Android sq lite database tutorial

10/16/2017 Android SQLite Database Tutorial
https://www.androidhive.info/2011/11/android-sqlite-database-tutorial/ 1/110
BEGINNER
BY RAVI TAMADA - NOVEMBER 27, 2011 - 0 COMMENTS
Android provides several ways to store user and app data. SQLite is one way of storing
user data. SQLite is a very light weight database which comes with Android OS. In this
tutorial I’ll be discussing how to write classes to handle all SQLite operations.
In this tutorial I am taking an example of storing user contacts in SQLite database. I am
using a table called Contacts to store user contacts. This table contains three columns id
(INT), name (TEXT), phone_number(TEXT).
    
Android SQLite Database Tutorial

Contacts Table Structure
Writing Contact Class
Before you go further you need to write your Contact class with all getter and setter
methods to maintain single contact as an object.
package com.androidhive.androidsqlite;
public class Contact {
//private variables
int _id;
String _name;
String _phone_number;
// Empty constructor
public Contact(){
}
// constructor
public Contact(int id, String name, String _phone_number){

this._id = id;
this._name = name;
this._phone_number = _phone_number;
}
// constructor
public Contact(String name, String _phone_number){
this._name = name;
this._phone_number = _phone_number;
}
// getting ID
public int getID(){
return this._id;
}
// setting id
public void setID(int id){
this._id = id;
}
// getting name
public String getName(){
return this._name;
}
// setting name
public void setName(String name){
this._name = name;
}
// getting phone number
public String getPhoneNumber(){
return this._phone_number;

}
// setting phone number
public void setPhoneNumber(String phone_number){
this._phone_number = phone_number;
}
}
Writing SQLite Database Handler Class
We need to write our own class to handle all database CRUD(Create, Read, Update and
Delete) operations.
1. Create a new project by going to File ⇒ New Android Project.
2. Once the project is created, create a new class in your project src directory and name it
as DatabaseHandler.java ( Right Click on src/package ⇒ New ⇒ Class)
3. Now extend your DatabaseHandler.java class from SQLiteOpenHelper.
public class DatabaseHandler extends SQLiteOpenHelper {
4. After extending your class from SQLiteOpenHelper you need to override two methods
onCreate() and onUpgrage()
onCreate() – These is where we need to write create table statements. This is called when
database is created.
onUpgrade() – This method is called when database is upgraded like modifying the table
structure, adding constraints to database etc.,

// All Static variables
// Database Version
private static nal int DATABASE_VERSION = 1;
// Database Name
private static nal String DATABASE_NAME = "contactsManager";
// Contacts table name
private static nal String TABLE_CONTACTS = "contacts";
// Contacts Table Columns names
private static nal String KEY_ID = "id";
private static nal String KEY_NAME = "name";
private static nal String KEY_PH_NO = "phone_number";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
+ KEY_PH_NO + " TEXT" + ")";
db.execSQL(CREATE_CONTACTS_TABLE);
}
// Upgrading database
@Override

public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);
// Create tables again
onCreate(db);
}
⇒All CRUD Operations (Create, Read, Update and
Delete)
Now we need to write methods for handling all database read and write operations. Here
we are implementing following methods for our contacts table.
// Adding new contact
public void addContact(Contact contact) {}
// Getting single contact
public Contact getContact(int id) {}
// Getting All Contacts
public List<Contact> getAllContacts() {}
// Getting contacts Count
public int getContactsCount() {}
// Updating single contact
public int updateContact(Contact contact) {}
// Deleting single contact
public void deleteContact(Contact contact) {}

⇒Inserting new Record
The addContact() method accepts Contact object as parameter. We need to build
ContentValues parameters using Contact object. Once we inserted data in database we
need to close the database connection.
public void addContact(Contact contact) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, contact.getName()); // Contact Name
values.put(KEY_PH_NO, contact.getPhoneNumber()); // Contact Phone Number
// Inserting Row
db.insert(TABLE_CONTACTS, null, values);
db.close(); // Closing database connection
}
⇒Reading Row(s)
The following method getContact() will read single contact row. It accepts id as parameter
and will return the matched row from the database.
public Contact getContact(int id) {
SQLiteDatabase db = this.getReadableDatabase();

Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID,
KEY_NAME, KEY_PH_NO }, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
Contact contact = new Contact(Integer.parseInt(cursor.getString(0)),
cursor.getString(1), cursor.getString(2));
// return contact
return contact;
}
getAllContacts() will return all contacts from database in array list format of Contact class
type. You need to write a for loop to go through each contact.
public List<Contact> getAllContacts() {
List<Contact> contactList = new ArrayList<Contact>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_CONTACTS;
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Contact contact = new Contact();
contact.setID(Integer.parseInt(cursor.getString(0)));
contact.setName(cursor.getString(1));
contact.setPhoneNumber(cursor.getString(2));

// Adding contact to list
contactList.add(contact);
} while (cursor.moveToNext());
}
// return contact list
return contactList;
}
getContactsCount() will return total number of contacts in SQLite database.
public int getContactsCount() {
String countQuery = "SELECT * FROM " + TABLE_CONTACTS;
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();
}
⇒Updating Record
updateContact() will update single contact in database. This method accepts Contact class
object as parameter.

public int updateContact(Contact contact) {
values.put(KEY_NAME, contact.getName());
values.put(KEY_PH_NO, contact.getPhoneNumber());
// updating row
return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
new String[] { String.valueOf(contact.getID()) });
}
⇒Deleting Record
deleteContact() will delete single contact from database.
public void deleteContact(Contact contact) {
db.delete(TABLE_CONTACTS, KEY_ID + " = ?",
db.close();
}
Complete DatabaseHandler.java Code:

import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
// All Static variables
// Database Version
// Database Name
private static nal String DATABASE_NAME = "contactsManager";
// Contacts table name
private static nal String TABLE_CONTACTS = "contacts";
// Contacts Table Columns names
private static nal String KEY_ID = "id";
private static nal String KEY_NAME = "name";
private static nal String KEY_PH_NO = "phone_number";
}
// Creating Tables
@Override

String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
+ KEY_PH_NO + " TEXT" + ")";
}
// Upgrading database
@Override
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);
// Create tables again
onCreate(db);
}
/**
* All CRUD(Create, Read, Update, Delete) Operations
*/
void addContact(Contact contact) {
values.put(KEY_NAME, contact.getName()); // Contact Name
values.put(KEY_PH_NO, contact.getPhoneNumber()); // Contact Phone
// Inserting Row
db.insert(TABLE_CONTACTS, null, values);
db.close(); // Closing database connection
}

Contact getContact(int id) {
Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID,
KEY_NAME, KEY_PH_NO }, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null)
// return contact
return contact;
}
public List<Contact> getAllContacts() {
List<Contact> contactList = new ArrayList<Contact>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_CONTACTS;
do {

}
return contactList;
}
public int updateContact(Contact contact) {
values.put(KEY_NAME, contact.getName());
values.put(KEY_PH_NO, contact.getPhoneNumber());
// updating row
return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
}
public void deleteContact(Contact contact) {
db.delete(TABLE_CONTACTS, KEY_ID + " = ?",
db.close();
}
String countQuery = "SELECT * FROM " + TABLE_CONTACTS;

cursor.close();
// return count
}
}
Usage:
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
public class AndroidSQLiteTutorialActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
DatabaseHandler db = new DatabaseHandler(this);
/**
* CRUD Operations

* */
// Inserting Contacts
Log.d("Insert: ", "Inserting ..");
db.addContact(new Contact("Ravi", "9100000000"));
db.addContact(new Contact("Srinivas", "9199999999"));
db.addContact(new Contact("Tommy", "9522222222"));
db.addContact(new Contact("Karthik", "9533333333"));
// Reading all contacts
Log.d("Reading: ", "Reading all contacts..");
List<Contact> contacts = db.getAllContacts();
for (Contact cn : contacts) {
String log = "Id: "+cn.getID()+" ,Name: " + cn.getName() + " ,Phone: " + cn.getPhoneNumb
// Writing Contacts to log
Log.d("Name: ", log);
}
}
}
Android Log Cat Report:
I am writing output to Log report. You can see your log report by going to Windows ⇒
Show View ⇒ Other.. ⇒ Android ⇒ Log Cat.

What’s Next?
If you feel comfortable with SQLite database, check out Android SQLite Database with
Multiple Tables which explains how to handle SQLite when your app needs more than one
table.
Ravi Tamada
Ravi is hardcore Android programmer and Android programming
has been his passion since he compiled his rst hello-world
program. Solving real problems of Android developers through
tutorials has always been interesting part for him.
DATABASE SQLITE
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Arise Rayamangalam
A problem with this type of method is if you want to add data say 100 nos then your code look
shabby and it will be very dif cult tot enter the data. You can use another method by which we can
enter the data using a Database Manager and later attach it to the Application. A simple tutorial with
source code is given in the following link

http://android-helper4u.blogspot.com/2013/03/d-databse-and-spinner-tutorial.html
Guest
Could I use this database to store dynamic elds such as latitude and longitude (for my app) which
gets refreshed every 10 sec. Is there a way to retrieve this data on a web server ?
Mohammad Alhobayyeb
Your tutorial is simple and clear.
I tried Vogella’s tutorial about SQLite but I get lost with it, although he is a good tutor in other parts,
but you beated him in SQLite part.
Thank you
Nirmal
you r right ,,he will give Some half half code,,so we confuse that data is going where
madV
just awsome man…
anjali
good.
anjali
it is good. but i have one doubt. how to creae multiple tables
Asif Hasan
Good example But how to add value like Email adress?
Giannis
Hi i get an error: table contacts has no column named phone, i run it in API level 15 i am really stack
and need ASAP help..please if anyone know asnwer me here or in my email: gveron@gmail.com
david molina
Did you make sure that you are creating that column in your table and is the exact name(spelling,

capitals, etc) I run into a similar problem but mine was resolved by adding onCreate before
manipulating the data, that way I make sure that if for any reason the table does not exists it will be
crated rst and I will not get any errors.
Garry Hickey
having same problem, says the column doesnt exist, why?
Akheloes
Just a benign thought : isn’t that the whole purpose of a database ?
me
Can you give an example in Usage of how updateContact works
Noah
Nice! However you can simplify the somewhat awkward
if (cursor.moveToFirst()) { do … while (cursor.moveToNext()); }
with a much cleaner
while (cursor.moveToNext()) { … }
Since the query / rawQuery moves the cursor before the rst entry.
Shahil Modan
Nice Tutorial i am new in android its help me a lot ….thank you !!!!!
kushi
helloo sir,
it has helped me very much thank you.but i do have got a problem please resolve my problem..
we r getting a o/p in logcat but i want to display data in listview that what ever the data stored in
sqlite database? please help me
thanks in advance

A guest
what is path of DB? where can i found my SQLite le here?
MAJK
Yeah, what is the path of database? Please answer as soon as possible.
BTW. Very useful tutorial !
Tonyoh87
Hey great tutorial.
I imported the project but I get the following errors:
[2013-05-05 17:34:18 – DemoActivity] Application package ‘AndroidManifest.xml’ must have a
minimum of 2 segments.
[2013-05-05 17:37:58 – Database] Error in an XML le: aborting build.
[2013-05-05 18:18:19 – Database] W/ResourceType( 8832): Bad XML block: header size 92 or total
size 0 is larger than data size 0
[2013-05-05 18:18:19 – Database]
C:UsersTonyoh87workspaceDatabasereslayoutactivity_main.xml:6: error: Error: No resource found
that matches the given name (at ‘text’ with value ‘@string/hello_world’).
[2013-05-05 18:18:19 – Database]
C:UsersTonyoh87workspaceDatabaseresmenuactivity_main.xml:2: error: Error: No resource found
that matches the given name (at ‘title’ with value ‘@string/menu_settings’).
[2013-05-05 18:19:28 – Database] W/ResourceType( 3340): Bad XML block: header size 119 or total
size 0 is larger than data size 0
[2013-05-05 18:19:28 – Database]
C:UsersTonyoh87workspaceDatabasereslayoutactivity_main.xml:6: error: Error: No resource found
that matches the given name (at ‘text’ with value ‘@string/hello_world’).

[2013-05-05 18:19:28 – Database]
C:UsersTonyoh87workspaceDatabaseresmenuactivity_main.xml:2: error: Error: No resource found
that matches the given name (at ‘title’ with value ‘@string/menu_settings’).
[2013-05-05 18:29:12 – AndroidSQLiteTutorial] Android requires compiler compliance level 5.0 or
6.0. Found ‘1.7’ instead. Please use Android Tools > Fix Project Properties.
Can you help me about this ?
nida
how to use “getAllContacts()” to display all user contacts in listview i m facing dif culty to do this
Tonyoh87
xed, please ignore my request
Tonyoh87
stupid question but how do we use the database ? I’m looking to use it for making a language
application
S
how value in id Column are generated and inserted
Deepu S.A

This is what a tutorial should be. I have nothing more to say. just perfect!.
Ali Fattahi
Hello
Thank you for your useful post , i have a question aboud sqlite
if I already have a sqlite database le how can I use in my project ?
Best Regards
Ali
Guest
a small correction : onUpgrage() shoudl be onUpgrade()
Shan
Great post ! A small correction : onUpgrage() shoudl be onUpgrade()
vsdf
Shoudl Should be Should
Guest
Thanks for pointing that out too!
Shan
Thanks for pointing that out too! It should be ‘should’ not ‘Should’
yasith
This helped me Thanks for writing the post.
Tejas
does any body know about maximum data base le size in(1.2 mb ) Assets folder.
will it cause any problem. What if it increases more than 1 mb. I know how to implement this. but is
there Any disadvantages of using it.

Sanjeev
Expecting content provider tutorial as good as this one soon sir…
anil
Thanks for this tutorial ……………..
anil
plz tell me How to display data from sqlite in textview.
majid
thanks for sample and good exmple.
Allen
Ravi,
Your getContact(int id) method will crash if there are no rows for the speci ed id. The returned
Cursor will never be null, but it could be empty. Cursor.moveToFirst() returns false if the Cursor is
empty, so the if condition should be:
if (Cursor.moveToFirst()) {}
instead of:
if (cursor != null) {}
Thanks for the tutorial, Ravi!
Milana
Hi Ravi,
can you please help me on coding of how to tag a photo which is in image view
Sanjay Mangroliya
Very Nice Example………..

Zach
Best tutorial for this I have seen, thanks!
Sandeep Saini
how to update the table with modi ed values…..????
and where to pass the ID…..??
Sadegh ghanbari
Nice example ,thank you.
http://www.AndroidSoftware.ir
Ryl
Hello
I am new with Android development..may i Know exactly how to write the output to textview ?
PrakashK Gowin
Use Edittext attribute in your .xml le
ryl
Solution by Ravi in previous comments
// setting name in textview
TextView txtName = (TextView) ndViewById(R.id.txtName);
// display name
txtName.setText(person.getName());
Do you knw how to share this contact database detail in another activity?
ryl
Hi Ravi, I would like to ask how can i share the contact database details in another activities?
PrakashK Gowin
Hi Ravi, Could You plz update us with some Apache Cordova (Phone Gap)Examples..

Saurabh Singh
nice example of data base–
but when i am doing some changes. on this code……..
like giving data from EditText
I am heaving a meney problem
…………………….
polash
Nice Tutorial………..
adnan
hi, good tutorial but i have got a problem. i am just adding and reading data but when i run it event
log doesn’t show something and emulator shows “Closed un expectedly” (i made some xml that why
m telling about emulator).
Moorthy
hi ravi.
nice tutorial,
wondering how to get Id of the record. am getting error
Thiago Borges
It doesn’t work for me. I’m getting:
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.androidhive.androidsqlite/com.androidhive.androidsqlite.AndroidSQLiteTutori
alActivity}: java.lang.IllegalStateException: attempt to re-open an already-closed object:
SQLiteDatabase: /data/data/com.androidhive.androidsqlite/databases/contactsManager
android fan
good tutorial…
Akhil
Hi…Can we use on Database Handler class for more than one table

Joseph
Nice tutorial, Only have a question: Where’s saved the SqLite db ? I want to take out for processing
syang
How are the “ids” generated?
Rowan
Fantastic tutorial. Worked perfectly.
Dan
Is it possible to view the tables in the database?
Jake
yes it is. Download SQLite plug-in from Mozilla Firefox browser click tools>there you get the SQLite
Manager. But download rst. Thanks.
volume_8091
And how can we save the table in a different le so that the user could save changes ?
raju
BRO Hats off for ur work, really its superb……..
the coding snippets and the way u explain the concepts in such an easy way and to the point its really
admirable…………….
madV
Awesome tut man..
Nilima Nandagavali
Thanks for this…..
Good Example!!!! :-))))
ASH
i got this error in handler lass .how we can x it?
ASH

Multiple markers at this line
– Contact cannot be resolved to a type
– Contact cannot be resolved to a type
– No enclosing instance of type contact is accessible. Must qualify the allocation with an enclosing
instance
of type contact (e.g. x.new A() where x is an instance of contact).
HOW WE CAN OVERCOME THIS ERROR
Govind Rao
Hi Sir,
i have one table like Team (Team_ID primary key and Team_Name UNIQUE)
when i start the my application i will work ne … rst time … and i inserted value like {1, ‘TeamA’}
{2,’TeamB’} the i close my application then .. again i try to insert same values … i am getting like”Error
insertionting Team_Name = teamB”.
please tell me the how cai solve the problem.
PrakashK Gowin
You cannot insert the same values again, because you have created the column Team_ID as primary.
So You need to give some other values for further insertion
arash ataafarin
Just For More Clari cation for newbie programmers,you should copy android_login_api folder in
c:/wamp/www or c:/xamp/htdoc
And if you use port 8080 to access xamp,wamp you should change links to :
loginURL = “http://10.0.2.2:8080/android_login_api/”;
registerURL = “http://10.0.2.2:8080/android_login_api/”;
Parth Sharma
I did this:
Contact contact = db.getContact(i.getExtras().getInt(“id”));
db.deleteContact(contact);

But still its not deleting anything but raising nullpointerexception(npe)
gds
Thanks man…. was hitting my head in the walls to get a hand on Android databases ….. this was the
best tutorial of all that came up on searching.
Thanks again
gds
yogesh
Its nice tutorial.
Using this i can i add and delete records in db but not able to update records.
So please reply for the same as early as possible for updating record using this tutorial.
Thanks in advance.
Techy
Its worth read article. Another blog also posted the same Topic with breaking everything in parts.
Getting started with DB in android
Lez-J
Hello my friend! when I try to execute your getAllContacts() method I have an outOfMemory
exception due to an in nite loop! but for people who have the same problem here is my way too x it:
public ArrayList getListContacts(SQLiteDatabase db){
ArrayList listeContacts = new ArrayList();
String query = “SELECT * FROM ” + TABLE_CONTACT;
//SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(query, null);

for(int i=0;i<cursor.getCount();i++){
banque.setName(cursor.getString(1));
banque.setPhoneNumber(cursor.getString(2));
listeContacts.add(contact);
cursor.moveToNext();
}
cursor.close();
return listeContacts;
}
Lez-J
sory for the previous post it’s about a project that I’m doing. but according with the object of this
tutorial
and sorry for my bad english I’m a french speaker
public ArrayList getListContacts(SQLiteDatabase db){
ArrayList listeContacts = new ArrayList();
String query = “SELECT * FROM ” + TABLE_CONTACT;

//SQLiteDatabase db = this.getWritableDatabase();
for(int i=0;i<cursor.getCount();i++){
listeContacts.add(contact);
cursor.moveToNext();
}
cursor.close();
return listeContacts;
}
radha
i need login activity with sqlite and sessions..can you please provide me link or any information
Amjad Mansour
thank you very much working
ilksen
I wanted to use this sample in my project. https://play.google.com/store/apps/details?

id=izasoft.kurumsal.uygulama maybe you can use Xml Source an alternative… Thanks your tutorial.
carterson2
Q: how big a table can you put in an Android cellphone? I have a 10GB table, and I am weary of
starting down this road, if queries will take minutes instead of seconds.. Thanks for posting. Any
advice appreciated!
Jim Pruett
Wikispeedia.org
Ravi Tamada
If you have larger database, you should not keep it in the device. You have to maintain a server and
make API calls from device and get the data.
Raja
if your data 10gb put data on server side not android phone
Sasuke Uchia
How did you make your table this big anyway. What it contains. There is no way you can create a
table that big, if you are not inserting special data type like Image, audio, Video…etc.
Anyway even if you will able to put it in your mobile phone. Do you know how much time it will take
to search and load the data. Even i think a computer may start hanging.
Anyway Good luck with that……(Why i suppose to care)
Harry May
I like this totorial, you explain it cleary and simple, thanks !!!
Hhayf
Hello.If someone could help me would be great.I installed this program,no errors,everything runs
normal,but after I ll in a form and press “add user” nothing happens.Can someone help me point the
problem?
A Friend from hiddle leaf
Well, you can’t just copy and use this class. You have to modi ed it according to your need.
Give me all the details about your layout what you want to save i will post a custom class for you.

Itachi Uchia
Nice Tutorials
Sasuke Uchia
Am i suppose to care. I am an avenger and i will avenge my clan
NarutoUzumaki of hidden leaf
Don’t you think you should use readable database to read all the contacts.
In getAllContacts
And what about the update query what will it update
Evgeniy Safronov
// Empty constructor
// setting id
etc.
Good tutorial but absolutely useless comments.
We are Titans….
You have disrespected me, Now you will face the wrath of titans
Itachi Uchia
Amaterasu – Burn in hell
Evgeniy Safronov
Wh.. why? You don’t agree that this is a good tutorial? 0_o
Tobi
Because Tobi is a good boy.
Yan Philippe
Hi, I don’t knowhow to simply delete a contact, can please someone help me?

//tablename is your tablename from which you want to delete
//KEY_ID is the column name
//keyid is the value
//Example you want to delete KEY_ID 20. (And remember you can also use any column you
//want in place of KEY_ID).
//Then keyid is 20 for your query
SQLiteDatabase db = getWritableDatabase();
String deleteQuery = “DELETE FROM ” + tablename +” WHERE “+KEY_ID+” =?”;
db.execSQL(deleteQuery, new String[]{String.valueOf(keyId)});
db.close();
suraj
its not working and also what about updating?
Working perfectly in my app.
By working what do you mean – giving Error, Exception, or wrong result.
In wrong result case i think you might entering wrong KEY_ID. KEY_ID is unique, and used to delete a
speci c contact.
Tobi
Load the data you want to update in an ArrayList of String then pass it to along with a userName ( any
uniquely identi ed attribute ) to update a particular contact.
Let say, you want to update user name, rst name, middle name, last name, email id,mobile number,
sex, and date of birth –
Use following code –
public int updateUser(String userName, ArrayList dataArray)
{
ContentValues values=new ContentValues();

String newUserName = dataArray.get(0);
values.put(KEY_USER_NAME, dataArray.get(0));
values.put(KEY_FIRST_NAME, dataArray.get(1));
values.put(KEY_MIDDLE_NAME, dataArray.get(2));
values.put(KEY_LAST_NAME, dataArray.get(3));
values.put(KEY_EMAIL_ID, dataArray.get(4));
values.put(KEY_MOBILE_NUMBER, dataArray.get(5));
values.put(KEY_SEX, dataArray.get(6));
values.put(KEY_DATE_OF_BIRTH, dataArray.get(7));
int index = db.update(TABLE_NAME, values , KEY_USER_NAME+”= ?”,new String[]
{String.valueOf(userName)} );
db.close();
return index;
}
amit
its xml
Jon
I am writing an app that queries an already created database (read only).
How do I connect to the database via its le?
All examples I have seen create the database on the y.
Jakub Pomykała

Have you found the solution? I’ve the same problem
Tobi
Hi there
Solution Founded
My Boy Itachi found it.
jit
so please tell us that solution..we want to access a already created database for readonly
purpose..example-to make a contacts app,which show results on inserting names in searchbox..
Tobi
Try this code :
public class DataBaseHelper extends SQLiteOpenHelper {
private Context mycontext;
//private String DB_PATH = mycontext.getApplicationContext().getPackageName()+”/databases/”;
private static String DB_NAME = “(datbasename).sqlite”;//the extension may be .sqlite or .db
public SQLiteDatabase myDataBase;
/*private String DB_PATH = “/data/data/”
+ mycontext.getApplicationContext().getPackageName()
+ “/databases/”;*/
public DataBaseHelper(Context context) throws IOException {
super(context,DB_NAME,null,1);
this.mycontext=context;
boolean dbexist = checkdatabase();
if (dbexist) {
//System.out.println(“Database exists”);
opendatabase();
} else {
System.out.println(“Database doesn’t exist”);

createdatabase();
}
}
public void createdatabase() throws IOException {
boolean dbexist = checkdatabase();
if(dbexist) {
//System.out.println(” Database exists.”);
} else {
this.getReadableDatabase();
try {
copydatabase();
} catch(IOException e) {
throw new Error(“Error copying database”);
}
}
}
private boolean checkdatabase() {
//SQLiteDatabase checkdb = null;
boolean checkdb = false;
try {
String myPath = DB_PATH + DB_NAME;
File db le = new File(myPath);
//checkdb = SQLiteDatabase.openDatabase(myPath,null,SQLiteDatabase.OPEN_READWRITE);
checkdb = db le.exists();
} catch(SQLiteException e) {
System.out.println(“Database doesn’t exist”);
}
return checkdb;
}
private void copydatabase() throws IOException {
//Open your local db as the input stream
InputStream myinput = mycontext.getAssets().open(DB_NAME);

// Path to the just created empty db
String out lename = DB_PATH + DB_NAME;
//Open the empty db as the output stream
OutputStream myoutput = new FileOutputStream(“/data/data/(packagename)/databases
/(datbasename).sqlite”);
// transfer byte to input le to output le
byte[] buffer = new byte[1024];
int length;
while ((length = myinput.read(buffer))>0) {
myoutput.write(buffer,0,length);
}
//Close the streams
myoutput. ush();
myoutput.close();
myinput.close();
}
public void opendatabase() throws SQLException {
//Open the database
String mypath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(mypath, null, SQLiteDatabase.OPEN_READWRITE);
}
public synchronized void close() {
if(myDataBase != null) {
myDataBase.close();
}
super.close();
}
}

Itachi Uchia
There are several ways, Simplest one is :-
Use “IF NOT EXISTS”
@Override
String CREATE_TABLE = “CREATE TABLE IF NOT EXISTS “+TABLE_NAME+”(” + all your columns + “);
” ;
db.execSQL(CREATE_TABLE);
}
If you still having troubles then let me know;
jit
we want to access a already created database for readonly purpose..example-to make a contacts
app,which show results on inserting names in searchbox..
Jon
This is the solution, more complicated than I thought
http://www.vogella.com/articles/AndroidSQLite/article.html
mich
BEST TUTORIAL ! THANKS SO MUCH!
André Kunde
Nice!
How can I use this List on a ListView component?
David E. Barrera
This is kinda tricky… ListView uses a layout to ll the list, hence you need an adapter… if using
android.R.layout.simple_list_item_1 it accepts String and from (using the Contact example) the
Contact you need to extract a String (Name probably) and load it into an ArrayList and this ArrayList
load it to the Adapter and this Adapter set it to the ListView…

jose
Great Tutorial, but can you tell me how can i show it in a ListView , and add images (icons)…
ThankYou
Itachi Uchia
First you need to learn about ListView – ( Use google to search, Open results, Prefer what suits you
best ) .
Second load the data from database into an ArrayList of type according to your need (Preferable
String) (1d, 2d .. . depends on your need )
Now load that data into a class and create objects, load that objects into an arrayList
Then use this new ArrayList to populate the ListView.
Finally – It is a big topic can’t be taught in a single comment.
Search this topic in google.
If you don’t know how to search in google then follow these links.
1. developer.android.com/guide/topics/ui/layout/listview.html
2. http://www.vogella.com/articles/AndroidListView/article.html
3. http://www.mkyong.com/android/android-listview-example/
4. http://www.youtube.com/watch?v=gaOsl2TtMHs
If you are a noob then watch youtube video in 4th link. It shows the simplest way to create ListView
with icons.
Vaibhav Luthra
I downloaded this example and used on my phone however when I go to log cat for checking results it
keeps running and I am unable to see any data..please suggest
Akamaru of Hidden Leaf
What do you want to say exactly ?
From your problem it looks like a in nite loop problem.
Can Gökdere
Hello, this is nice tutorial but there is a thing I do not understand. When to close or not close the
database and cursor? In this tutorial it seems random. Also, what happens if you close/do not close

Shikamaru of Hidden Leaf
This is a nice question to ask,
I would like to answer it as simple as possible
First, When we need to open a database :-
The answer is that – Whenever you want to access anything ( Tables, Views, Indexes . . . )
from a database you have to open it, in other words you have to open the connection between your
program code and database.
You can do it easily by using SQLiteDatabase in Android like this,
SQLiteDatabase db = this.getWritableDatabase(); //To write;
SQLiteDatabase db = this.getReadableDatabase(); //To Read
Any of those statements will open the default database for your app that is set by you in the
constructor of your database class.
So, if you want to access a database you have to open it ( In other words you have to open the
connection b/w your app and database. This is obvious that rst you have to create the connection. )
Second, Why you have to close a Database connection.
Remember that you must always close the Database connection if it is no longer needed for better
performance of your app. If a connection is opened then it will use system resources which will
reduce your app’s performance.
In Android You will get an Exception if you forget to do that, However if you want multiple
connections to a database through your app then you have to specify it clearly. In C# you do this by
using MultipleActiveResultSets=True;
If you forget to do that and you are accessing database concurrently ( In other words multiple
connections are opened for some purpose say – You have to read from one table and write to
another table in same database ) then you will get an Exception.
At last,
you should always:

1) Open connections as late as possible
2) Close connections as soon as possible
The connection itself is returned to the connection pool. Connections
are a limited resource. Any new connection you establish that has exactly the same connection string
will be able to reuse the connection from the pool.
Cursor are used to execute database queries in Android.
Formal De nition is – cursor is a interface provides random read-write access to the result set
returned by a database query.
Cursor implementations are not required to be synchronized so code using a Cursor from multiple
threads should perform its own synchronization when using the Cursor.
It is recommended to close all cursors when you are not using they anymore.
If you keep it opened, you will cause a memory leak on your application.
MMJQ
Bump, as the question is a good one and wasn’t answered. In the example in this post, the author calls
db.close() on insert and update operations but not on query retrieval operations. I’m particularly
curious about this as I’m trying very similar operations and frequently getting database locked
exceptions.
krunal
hello guy,
i develop application which have bulk inset record in database.
i have two question…
1) when record are inserted at time i can not read record, my query got in the queue, it is possible
that access data and insert data at time…?
2) what is the limit of sqlite data base..size…?
Itachi Uchia
1.

Simple answer for your question is – “IMPOSSIBLE”
Even if you getting success to do so – Means you are getting wrong results.
I think you should know the basics of Database –
Why database is better then le handling and other data storage methods.
Simple answer –
You can’t perform W-W, W-R, R-W operations simultaneously.
( W – write, R- read )
However you can execute in nite R-R operations at a same time.
Just think about the online Banking system or Railway reservation system.
In which there is a special feature of database is used which is Transaction.
It follows ACID.
which is Atomicity, Consistency, Isolation, Durability.
Atomicity – Either complete or not at all.
Consistency – After each transaction system will go from one consistent state to another consistent
state.
Isolation – Every transaction will executed in isolation of each other.
( Means if write query come rst it will executed rst ) There is just no way to give both write and
read operation at the same time. Even there is a difference of nano second System will detect it.
However if you got success to do so . db simply reject it or execute the operation which has higher
priority.

Durability – System must durable in time.
–Maybe it is very broad than a simple database but it may be help you to understand.–
2.
An SQLite database le is organized as pages. The size of each
page is a power of 2 between 512 and SQLITE_MAX_PAGE_SIZE. The default
value for SQLITE_MAX_PAGE_SIZE is 32768.
The SQLITE_MAX_PAGE_COUNT parameter, which is normally set to
1073741823, is the maximum number of pages allowed in a single database
le. An attempt to insert new data that would cause the database le
to grow larger than this will return SQLITE_FULL.
So we have 32768 * 1073741823, which is 35,184,372,056,064 (35 trillion bytes)!
You can modify SQLITE_MAX_PAGE_COUNT or SQLITE_MAX_PAGE_SIZE
in the source, but this of course will require a custom build of SQLite
for your application. As far as I’m aware, there’s no way to set a
limit programmatically other than at compile time (but I’d be happy to
be proven wrong).
gdguradio@gmail.com
please help me on this canyou show me how to solve this …..
” Contact getContact(int id) ”
how to use this function please give sample on how to do it like i want to get names only so i want to
check the column name only and get all the names that are john any sample on this?and how to use
other functions as well..
Sandeep Pareek
hi
I have a question, Where did this database got created? on sdcard? or on phone memory? I wanna
access that db le manually,

just to add, can I create a folder in SD card with some name as “contact db folder” and save that db
there in that folder on android?
Thanks for the best tute on SQL basics.
Tan Woon How
You can have a look on this http://instinctcoder.com/how-to-browse-android-emulator-sqlite-
database/
David E. Barrera
database is saved in internal memory…
Hasan Rahman Sawan
Hi, I am getting this error:
[2014-01-07 09:49:56 – Dex Loader] Unable to execute dex: java.nio.BufferOver owException.
Check the Eclipse log for stack trace.
[2014-01-07 09:49:56 – AndroidSQLiteTutorial] Conversion to Dalvik format failed: Unable to
execute dex: java.nio.BufferOver owException. Check the Eclipse log for stack trace.
[2014-01-07 09:53:09 – AndroidSQLiteTutorial] Dx
trouble writing output: already prepared
Please help. Thanks.
ZaidiSoft
Thank you much for a very good and useful tutorial. Quick question though. Is it possible to have add
contact and display all contacts in one activity. What I mean is, to have edit text and add new user
button as well as list view of all contacts on the same UI.
AyemMadScientist
Thanks for the tutorial. Btw any idea how can i load the data from database into gridView, or how
can i pass the data to String[]?

AyemMadScientist
Oh hey, im the OP. Already found the solution, and if you guys interested have a look: http://dj-
android.blogspot.in/2012/10/android-show-data-from-sqlite-db-into.html
wild974
I am looking for some help on how to use this tutorial to load what i have in the database to a
listView. Have been searching for days on how to do this with no luck. If someone could point me in
the right direction. I can post my code if need be.
hồng tươi nguyễn
1. you read all columns of database by function getAllContect as above
2.you need a custom listview by adapter , then you show your data in listview.
glenn
Under AndroidSQLiteTutorialActivity,
What does for (Contact cn : contacts){ does?
1.Dont understand what is cn and where it comes from.
2. What does : means?
Android@143
Its a new looping mechanism; it recommend on working with multiple objects.
Here,
‘cn’ is an object of Contact class.
contacts is the collection of Contact class objects.
This loop execute the total Contact objects present in the collection; and the checking is not needed.
Only the Contact class objects are looped.
gdguradio@gmail.com
check the column name only and get all the names that are john any sample on this?
broskie

So how would I add the database to a listView in another activity. I would like to click on a button that
will take you to another activity and display the name and phone number of each contact in a
listView with an onClick listener for each. Thanks for the help.
hồng tươi nguyễn
in activity you want to show databse :
1. you read all columns of database by function getAllContect as above
2.you need a custom listview by adapter , then you show your data in listview.
george
Hello. I need someone
to develop a simple app. will use java , php and sql. please reply to george.celsie@gmail.com
if you can help me. I will share the
credits :). Thanks
Nasif Ahmed
Can you please tell me why you use(_) _id, _name, _number insted of id, name, number?
Karim
I think it’s a coding style, to put _ before the name of local variables declared in a class.
George Imerlishvili
String countQuery = “SELECT * FROM ” + TABLE_CONTACTS;
cursor.close();
// return count

}
This function throws exception:
java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteQuery: SELECT *
FROM contacts
You must get count before cursor.close();
This is correct way:
int count = cursor.getCount();
cursor.close();
return count;
}
Joseph David
Try this:
.
.

.
cursor.close();
// return count
return count;
Shazwan
I can’t nd the database le. where does it saved?
Bhaskar
Windows -> Show View -> Other.. -> Android -> File Explorer
Data->Data->com.xxx.xxxx(Your package Name) ->Databases
LaLaRargh
I’m just wondering, but how would you call the updateContact method in your activity class? I’m
presuming it must be something like:
contacts = db.updateContacts(); ?
something along the lines of
contacts = db.updateContacts(new Contact(); ?
Thanks for any help.
Brian K. Trotter
I notice that the onUpgrade() function wipes the previous database and starts over. While I could see
some applications where that would be bene cial, I’d sure hate to lose a database with 100 contacts
in it just because I decided to add a eld for a 2nd phone number. Is there an easy way to upgrade a
table to add a eld without wiping the previous data?
Mehmet Yildiz
if we use existing database and wants to upgrade database what should write in upgrade methods

Bharat Jiyani
God Bless You
Matthew N
Thanks alot for a great tutorial! extremely helpful for a somewhat tricky topic for new android
developers!
Anshuman
Thanks for the codes and the idea. One question I had in mind was where to write this code?? Do I
create a separate package for the database or should I write the code in MainActivity.java itself??
Please help
Thank you
Shima Shirazi
Hi,
Thank you for Tutorial.
I would be very thankful if you answer my question:
Where can I see my database application in (android) phone?
I rooted the phone, but I can not nd folder such as /data/data/my_app/databade
Arsal
data->data->see your package name-> databases->
Kamolporn Sanamlao
I would like to thanks, this tutorial is helpful.
Hendrik
Hi, in the addContact method, can someone explain why only KEY_NAME and KEY_PH_NO are
being added? Does KEY_ID not need to be added? Thanks
Noman
because it is auto increment
Chrisantics
hello! how do i want to view the database in sqLite browser? I can’t seem to nd the .db le??

Shima Shirazi
Somebody answer my question, plz
Also Ravi
Never before have I gone through a tutorial like this and had it work on the rst time. Ravi Tamada
you are the man!
Abdullah Ben Nakhi
How do you store images in the SQLite database ?
aref chegini
Hello,
Thank you for Tutorial.
how do you store group data in the sqllite database and when im create a program in eclips and im
install in the mobail database is void .
Cnu Federer
Hi,
thanks for neat tutorial.
I’m unable to see the created db les physically in my device. (/data/data//)
do you have any idea why this happens?
Trevor L.
Thanks, your tutorials are much appreciated.
Zahidul Islam
good tutorial but one thing..data reinserted while run the tutorial again. i.e four rows inserted as 20
rows when run the tutorial 5 times. plz solve.
Faisal
this is not a problem ~
Jagdeep

cursor.close();
// return count
Error here cannot access the cursor after closing it better put the count in some another variable and
return that variable.
ramesh bs
You should not close the cursor after u query, cursor is the one which hold data & other objects. So if
u close, it wont give u count. Once all cursor operations is completed. close it
gdguradio@gmail.com
check the column name only and get all the names that are john any sample on this?because when i
use it , it throw an exception like this
” throw new CursorIndexOutOfBoundsException(mPos, getCount());”
and how to use
List contacts = db.getAllContacts();
without using this code
String log = “Id: “+cn.getID()+” ,Name: ” + cn.getName() + ” ,Phone: ” + cn.getPhoneNumber();
Log.d(“Name: “, log);
like if i want to use if to compare if i get same value from the name? like if i want to get all name of
john from the list
Milad Nozari
Thanks, good tutorial. But may I ask why are you using:
Integer.parseInt(cursor.getString(0));

instead of:
cursor.getInt(0);
Thanks
Manoj
it has store the data in string format
Manoj
Check this one…db.addContact(new Contact(“Ravi”, “9100000000”));
its storing data in string format…not stored in
db.addContact(new Contact(“Ravi”, 9100000000));
piter09100
Thank you, great tutorial
But I dont understand how you set IDs. My app gives ID=0 to every save and I dont know why??
David Doyle
The de nition for the I’d column using ‘Integer primary key’ should automatically increment on an
insert. If that is not working try ‘integer primary key auto increment not null’.
piter09100
Thanks, it works now, I’ve changed …+ KEY_ID + ” INTEGER PRIMARY KEY,”.. to …+ “KEY_ID
INTEGER PRIMARY KEY,”…
Sarthak Majithia
You need to change “INTEGER PRIMARY KEY” to “INTEGER PRIMARY KEY AUTO INCREMENT
NOT NULL”
Mike
Hi,

For the AndroidSQLiteTutorialActivity class, i am facing an error where the code
gives me an error saying: The constructor DatabaseHandler(SQLiteSubmit) is unde ned
Does anyone know how to solve it? Should the class extend SQLiteOpenHelper instead of Activity?
Sushreekant Mishra
Try DatabaseHandler db = new DatabaseHandler(AndroidSQLiteTutorialActivity.this);
Mike
Hi thanks for the help!
I am new to android development and databases. Can i check whether data SQLite database is only
accessible to 1 user/device?
For example, if there is a Contacts database, and many users all over the world want to access this
database to retrieve information, what kind of database should be used?
David Doyle
This only allows you to store in a db accessible on the device to one application. To use a shared db,
accessible from multiple devices, you’d need to call a web service (though you still might want to
store a local copy of any information for caching purposes).
santosh
how do i show this data in tablerow
Asad Ali Jogi
how to save data from soap to sqlite database in android
I am getting GetVehicles method of SOAP WSDL from SOAP web services and call that GetVehicles
result in TextView when clicking on a Button event.
when I run program , I want to store that result shown in TextView in Sqlite database?

How can I do that?
I have make a class getter Setter and databasehandler which extends SQLiteOpenHelper?
Jongsik
Very useful article! Thank you
Ravi Tamada
You are welcome
Umar Ashraf
Plz tel me if I want to show the output in an Amulator in the form of Listview, plz send me the code…
junka
Thank you very much for the tutorial. It worked very well except for the getContactsCount() function.
It was giving me an error saying that I was trying to read a value from a closed object. I changed the
code to:
int count = cursor.getCount(); //added line here
cursor.close();
return count;
}
After that everything was working smoothly. Thanks again.
Jomel
how to use that getContactCount
tok
Is there any possibility to add ArrayList as a type of row?

Anas
Nice article, very useful!
NewtoAndroid
The type java.lang.Object cannot be resolved. It is indirectly referenced from
required .class les
– The type java.lang.String cannot be resolved. It is indirectly referenced from
required .class les
Above error in DatabaseHandler.java le
NewtoAndroid
for — package com.androidhive.androidsqlite;
Midomed
what if I wanted to create a query to search for a particular id or a name?
Nika KirkitaZe
Hi. Thank you for this tutorial, it is really helpful.
Unfortunately my app gives ID = 0 to every time, i tried (INTEGER PRIMARY KEY),(‘_id’ INTEGER
PRIMARY KEY AUTOINCREMENT), (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL),
But i am getting same result always. what can i do?
FDM.Pro
Why use static variables in contact class?
FDM.Pro
Sorry in Handler not in contact.
Dilberius Bič Božji
Does anyone know how to display database in textview or in anything like database? I would like to
make a highscore but do not know the code to display strings in textview pls answer at
dilberius@gmail.com

mukesh
at logcat here elements add one by one when connection is generate………….
THE PROBLEM HERE
do {
}
REDUCE IT……..
THANKS WITH BEST REGARDS
baus
where is the the ” ( ” in the CREATE_CONTACTS_TABLE-String?
Agilitis
Hello everyone! I’m facing a pretty irritating problem… My app starts on my mobile but it shuts down
without any errors, any ideas?
Maryea
hyee ….
i am facing database upgradation problem.. using a pre populated sqlite database… it works ne.. bt
when i try to update it by inserting values in existing table using sqlite browser.. it never upgrades…
and shows no such record..
Any idea for solution???
Guest

never Forget to close the Cursor in method getAllContact!
Russelius Ernestius
some methods did not Close database or the Cursor…
Jason Flaherty
Hi, How do I create a method to check for existing records? I don’t want to add duplicates for
example. Thanks!
Kuev
+1 I was going to ask the same question… Anyone can help?
Ahmed Sobhy
realy am very happy now i can say that i may anderstand sqlite database android thanks
Syed Ahmed Ali
Awesome tutorial… got an idea on SQLite database
Jakub Šerých
Thanks for perfect tutorial. I have two questions:
1) How to prepare the SQLlite database and and ll it with the data before it is used in android app?
All the tutorials I have red are creating the empty database directly in the dbHelper onCreate, but I
already have the initial data, so I need to open the fully functional database in the app and not to
create the empty one.
2) How to dump the state of the database inside the phone onto the SD card and import the data back
to database when needed. It would be very usefull in the case of database upgrade.
Thanks for any info
Jakub
Ravi Tamada
1. For the rst question, you can insert the data in onCreate method of sqlite class or you can insert
the data from the starting point of your app.

2. For exporting the db to SDCard, you can try below link
http://stackover ow.com/questions/6540906/android-simple-export-and-import-of-sqlite-database
Jakub Šerých
Thanks! It seems perfect. Exporting/importing also solves the rst question, as I can create db and ll
it with data in SQLite Manager (FireFox plugin), pack it into *.apk and than import it in database
onCreate method.
Thx
Jakub
June
Hi Jakub,
Please have a look on the question I just asked to Ravi on the same context as of yours. May be you’ll
also be able to help.
June
Hi Ravi,
Is it possible to have a ready-made database instead of populating one while running the app? I mean
you just answred @jakuberch:disqus asking him to populate the data either of the two ways i.e.
inserting in onCreate or inserting from the starting point. I want the database ready to use after
installing the app only. How to achieve that? And how can I update the database from server in such
case?
Duke
Hi, Thanks for the Nice Tutorial.
This line is throwing error.
” contact.setID(Integer.parseInt(cursor.getString(0))); ”
Kindly advise.
Also, getContactsCount() was throwing exceptions, due to closed cursor, so i removed cursor.close().
now its working ne.
Guest

Thanks bro, its works
Guest
Hi,
Thanks alot for the tutorial. I have done all this.
Can I know how to connect this sql database with eclipse?
Can anyone help me please?
dr_ervina
Thanks a lot ravi for your very simple useful code
swhp
wow thanks ravi, it’s very simple but useful tutorial
Benz Narankz
Hey Ravi Tamada,
I have a database app that stores users’ names, phone numbers and email addresses, it works ne but
I wanted it to do some extra task. I created an itemOnClickListener to handle clicking on saved
contacts. Clicking on the listItems produces a popup menu with 3 options;
1. Call selected person
2. SMS this person
3. Send email
I created the pop up menu but now I want it to be in such a way that when I click on “Call selected
person” option, it should get the respective phone number from database and call it. Please help.
abhishek garg
numberFromDatabase = “111-333-222-4”;
String uri = “tel:” + numberFromDatabase.trim() ;
Intent intent = new Intent(Intent.ACTION_CALL);

intent.setData(Uri.parse(uri));
startActivity(intent);
name
you did very well ………
Appkart In
Hi Ravi , Some modi cation is needed in your code
1.You should also add id of contact in ContentValues in addContact().
2.Cursor can be null so that check null for whole code not only cursor.moveToFirst();
if (cursor != null) {
}
swagat
I did the same code, but app is throwing error- Unfortunately stopped. What is the reason??
bharat
hey can u help? How to connect an externally created sqlite database in android studio??
Hüseyin Mesecan
in getContactsCount: you write curser.close(); and then return curser.getCount(); why?
wathmal
why can’t we use cursor.getInt(0) instead of Integer.parseInt(cursor.getString(0)) ???
Ravi Tamada
Yeah, my mistake

rootbee
hi ravi.. i m going to build one my own app so could you please me.. bcz i m in confusion. if possible
mail me in here rootbee2014@gmail.com
Twelve
Useful tutorial, thx !
gourav
How to insert Paragraph in database and retrive it as a paragraph???
David Bu
Hi i am using ur code and by the way its the cleanest code ive seen ive watched your videos and glad
to no your from a c sharp background your code matches entity framework basically if only their was
an orm like that do you have an example of how to populate a listview using ur DBHandler class that
is the point I am stuck on at the min using the GetAlLContacts I am wanting to populate a listview
with it
Tejwinder
you saved my day
thanks Ravi
WanderFilho
Thank you very much for the explanation.
I’ve been looking for something like this on the web and you made it very simple and incisive.
TheFiddle47
What is the data type to add the photo of the contact? Its Byte[]?
yash
you can store images with BLOB..!!
bilgee
is BLOB is byte array ?

Chetan
if I want to store data in sqlite le for permenate storage of data then how i connect to that le where
i store that le SQLITE le
Gaurav
when i write statement that give me the error
List contacts = mDb.getAllStudentList();
The method getAllStudentList() is unde ned for the type SQLiteDatabase how to i solve
PrakashK Gowin
Write this getAllStudentList() method in your DbHandler Class with public access.
Gaurav meghanathi
actually i am trying to fetch data into sqlite-database in a list-view but this tutorial not much helpful..
mahboob gh
how to update my contact database whenever android local contacts changed . I need to store
contacts in database but I need to update it when a new contact is deleted or edited or inserted and
update local contact when in my app a eld changed,please help me.thank you
Gaurav meghanathi
how to set string log to listview and display that object
Rúben Diogo
I had the same question and I used a simple adapter. Check my code:
public class AndroidSQLiteTutorialActivity extends Activity {
/** Called when the activity is rst created. */
ArrayList<HashMap> contactList;
private static nal String TAG_NAME = “name”;
@Override
public void onCreate(Bundle savedInstanceState) {

setContentView(R.layout.main);
ListView test = (ListView) ndViewById(R.id.listView1);
/**
* CRUD Operations
* */
// Inserting Contacts
Log.d(“Insert: “, “Inserting ..”);
db.addContact(new Contact(“Ravi”, “9100000000”));
db.addContact(new Contact(“Srinivas”, “9199999999”));
db.addContact(new Contact(“Tommy”, “9522222222”));
db.addContact(new Contact(“Karthik”, “9533333333”));
// Reading all contacts
Log.d(“Reading: “, “Reading all contacts..”);
contactList = new ArrayList < HashMap > ();
String log = “Id: “+cn.getID()+” ,Name: ” + cn.getName() + ” ,Phone: ” + cn.getPhoneNumber();
Log.d(“Name: “, log);
String name = “” + cn.getName();
HashMap contact = new HashMap ();
// adding each child node to HashMap key => value
contact.put(TAG_NAME, name);

}
SimpleAdapter adapter = new SimpleAdapter(this, contactList, android.R.layout.simple_list_item_1,
new String[] { TAG_NAME }, new int[] { android.R.id.text1 });
test.setAdapter(adapter);
}
}
vnshetty
Hi , why we need SQLiteDatabase db = this.getWritableDatabase(); in getAllContacts()
function?,where we are only fetching the data from db. Cant we use SQLiteDatabase db =
this.getReadableDatabase(); ?
shivashish
thanks a lot sir for your simple and extremely helpful code.
Basha
Your tutorials are awesome yesterday I subscribed in your site. But still i didn’t get any con rmation
email from you.
BLAH
Can someone give me the example of deleting the user??
Abhay
`this.getReadableDatabase(); makes the app to crash
Ravi Tamada
Check the LogCat for errors.
Edward Lim
Just wanted to give a huge shoutout to you and your work, Its all thanks to you that I nally have my
app on the app store Although its just something simple I created, i created it because I found a
need for it. Check it out if you guys are interested, again huge thanks to your work!!!

https://play.google.com/store/apps/details?id=com.workoutlog.elcsgen.thesimpleworkoutlog
Midhun
There is an error in your getContactsCount() function. The cursor object is closed before calling
cursor.getCount().
JAMES
The database name has to end with .db
Sanket Prabhu
In future, can ORMLite/Realm takeover the SQlite? As a developer which is best as considering
functionality?
Usman Ishrat
Well elaborated… could be more helpful if you explain the parameters of the queries .
8Farhan Shaikh
if u understood program plz help ..i posted above my query plz help me out
Henrique Rosa
How can i exclude the table, not the rows, but the intire table?
8Farhan Shaikh
i have try to do above program but i stuck at main class ……. when initiate() the DatabaseHandler like
this DatabaseHandler db=new DatabaseHandler(this); in mainActivity class it says to impement
arguments … but when i sae in your mainActivity there is no argument expect(this)
please help me soon
Gergely Bindics
Hi!
Thank you for this tutorial, it was very useful.
There was one problem with it if I am correct.

Calling getContactsCount() method, my app crashed.
The problem was that you closed cursor and then tried to call its getCount() method.
So I stored cursor,getCount() int a variable, closed the cursor and then returned the variable.
Cheers!
Ravi Tamada
Yeah. Your code is correct.
masoud seraj
nice tutorial!
Sunil Singh
very nice for beginners
Shindou Takuto
where is code for update and delete contact? and i want to list it in list view.. thanks
Tim
@shindoutakuto:disqus not to be rude, but you should read up on how android components work
together to form an application. The code for updating and deleting is in the DatabaseHandler class,
its up to you to try to gure out how to put it together. The author shows a good example of how to
use it in the activity, just look by the “CRUD operations” comment. Great Job @ravi8x:disqus.
Homen
Nice tutorial
Rhiedzal Brilliant Marz
How showing database in layout?? please
AK
I am making a small app which will just add and delete products but It is not able to print the
database

I want to print the database but it is not entering in the while loop which is made to move the cursor
to access the product name
Here is my code for products.java class
package com. rstapp.sqliteexample;
public class Products {
private int _id;
private String _productname;
public Products(String productname) {
this._productname = productname;
}
public void set_id(int _id) {
this._id = _id;
}
public void set_productname(String _productname) {
this._productname = _productname;
}
public int get_id() {
return _id;
}
public String get_productname() {
return _productname;
}
}
Here is my code for MyDBHandler.java

import android.database.Cursor;
import android.content.ContentValues;
public class MyDBHandler extends SQLiteOpenHelper{
public static nal String DATABASE_NAME = “products.db”;
public static nal String TABLE_PRODUCTS = “products”;
public static nal String COLUMN_ID = “_id”;
public static nal String COLUMN_PRODUCTNAME = “productname”;
public MyDBHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int
version) {
super(context, name, factory, version);
}
@Override
String query = “CREATE TABLE ” + TABLE_PRODUCTS + “(” +
COLUMN_ID + ” INTEGER PRIMARY KEY AUTOINCREMENT, ” +
COLUMN_PRODUCTNAME + ” TEXT ” +
“);”;
db.execSQL(query);
}
@Override
db.execSQL(“DROP TABLE IF EXISTS ” + TABLE_PRODUCTS);
onCreate(db);
}

//Add a new row to the database
public void addProduct(Products product){
values.put(COLUMN_PRODUCTNAME,product.get_productname());
db.insert(TABLE_PRODUCTS, null, values);
Log.i(“database:”, String.valueOf(values));
db.close();
}
//Delete a product from the database
public void deleteProduct(String productname){
db.execSQL(“DELETE FROM ” + TABLE_PRODUCTS + ” WHERE ” + COLUMN_PRODUCTNAME + ”
=” ” + productname + ” “;”);
Log.i(“database:”, “yo”);
}
//Print out the the database as a string
public String databasetoString(){
String dbString=””;
String query = “SELECT * FROM ” + TABLE_PRODUCTS;
Log.i(“database:”, “print”);
Log.i(“database:”, “inif”);
do {
Log.i(“database:”, “inloop”);
dbString += cursor.getString(cursor.getColumnIndex(“productname”));
dbString += “n”;

}
db.close();
return dbString;
}
}
Here is my MainActivity.java code
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.EditText;/*
import android.view.Menu;
import android.view.MenuItem;*/
public class MainActivity extends AppCompatActivity {
EditText buckysInput;
TextView buckysText;
MyDBHandler dbHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.activity_main);
buckysInput = (EditText) ndViewById(R.id.buckysInput);
buckysText = (TextView) ndViewById(R.id.buckysText);
dbHandler = new MyDBHandler(this, null ,null ,1);

printDatabase();
}
/*@Override
public boolean onCreateOptionsMenu(Menu menu) {
// In ate the menu; this adds items to the action bar if it is present.
getMenuIn ater().in ate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection Simpli ableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
*/
//Add a product to the database
public void addButtonClick(View view){
Products products = new Products(buckysInput.getText().toString());
dbHandler.addProduct(products);
printDatabase();
}
//Delete items
public void deleteButtonClick(View view){

String inputText = buckysInput.getText().toString();
dbHandler.deleteProduct(inputText);
printDatabase();
}
public void printDatabase(){
Log.i(“db”, “entering database”);
String dbString = dbHandler.databasetoString();
buckysText.setText(dbString);
buckysInput.setText(“”);
Log.i(“db”, “exiting database”);
Log.i(“db”, String.valueOf(dbHandler));
}
}
XML code
Sathish Kumar
how to save the datas from the server to sqlite database
roopa
hi. iam new to sqlite.. and i need code from you sir.how to develop a program for name,phno,
city,country elds give from the key board and store data in sqlite and display in another activity
using list view.
roopa
sorry stored data display from another activity.
joejava
//MySQLiteHelper
package com.egci392.qz0428;

public class MySQLiteHelper extends SQLiteOpenHelper{
public static nal String TABLE_DATA = “data”;
public static nal String COLUMN_ID = “_id”;
public static nal String COLUMN_ROUTENAME = “routeName”;
public static nal String COLUMN_START_LATITUDE = “start_latitude”;
public static nal String COLUMN_START_LONGITUDE = “start_longitude”;
public static nal String COLUMN_STOP_LATITUDE = “stop_latitude”;
public static nal String COLUMN_STOP_LONGITUDE = “stop_longitude”;
public static nal String COLUMN_COLORFLAG = “color”;
private static nal String DATABASE_NAME = “data.db”;
// Database creation sql statement
private static nal String DATABASE_CREATE = “create table ”
+ TABLE_DATA + “(” + COLUMN_ID + ” integer primary key autoincrement, ”
+ COLUMN_ROUTENAME + ” text not null,”

+ COLUMN_START_LATITUDE + ” real not null,”
+ COLUMN_START_LONGITUDE + ” real not null,”
+ COLUMN_STOP_LATITUDE + ” real not null,”
+ COLUMN_STOP_LONGITUDE + ” real not null,”
+ COLUMN_COLORFLAG + ” text not null);”;
public MySQLiteHelper(Context context) {
super(context,DATABASE_NAME,null,DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
} //when the program runs will runs this command rst and table will be created
@Override
Log.w(MySQLiteHelper.class.getName(),
“Upgrading database from version ” + oldVersion + ” to ”
+ newVersion + “, which will destroy all old data”);
db.execSQL(“DROP TABLE IF EXISTS ” + TABLE_DATA);

onCreate(db);
}
}
Arpit
Thanks for the tutorial ravi sir but i wanna a know how to add .sql le in to the our SQLite database
Please help me suggest any link to do that and sorry for my english
Nirav Kalola
Very nice tutorial. thanks for sharing
Ravi Tamada
You are welcome
Elashry
how can match a new reading data with saved sqlite database
Kamaro Lambert
Man I love your tutorials they are very simple to understand and codes are very clean.
Goodness Adewale
“the codes are very clean” – very true
Ravi Tamada
Lucas Ofend
Please sir, i have an issue with the SQLite Database Restore button in c#.
Can you guide me please on how to restore an SQLite database in c#??
i’ll be very gratefull .
hezo
thank you ! it very useful .

Ravi Tamada
You are welcome!
Lucas Ofend
Please sir, i have an issue with the SQLite Database Restore button in c#.
Can you guide me please on how to restore an SQLite database in c#??
i’ll be very gratefull
DroidTalker
Hi,
@ravi8x:disqus thank u for rst of all.
i need a question:
In your opinion,
how do i have to choose database for any android application?
SQlite or PHP Mysql or else?
What i need to suggest?
Thank u very very much
Regards,
Nirav Kalola
Very nice tutorial
Shreedhar090
Thanks a lot man…
Ravi Tamada
You are welcome
Ahmad Muzzammil
how can i make an app that function read database not create, edit or even delete it? so there is a
search bar them if i insert an ID the result is detailview of the ID. Thank you

Ravi Godara
Thanks a lot for the code ….
A superb post for image upload & retrieve is also at
http://godara4ravi.blogspot.in/2016/03/select-image-from-gallery-upload.html
Luth M Nabil
Thanks for the Sample
Graham Washbrook
Thank you. Any reason why db.close() is not called in some of the CRUD operations?
Ravi Tamada
Yeah, please add it before return. Also I suggest you create a singleton class to initiate the sqlite.
Marcus Silva
Thank You Soooo much !!!
Great tutorial, well explained !
KC Raju Vysyaraju
it’s great and simple.
Thank you
orence cosmas
This is awesome! Thanks
Amit Jayant
Thanks a lot!
‫ارﺣﻢ‬
i have error in DatabaseHandler ? why?
FaisalHyder
As salam o alaikum.
Error, where? which error? Be speci c brother..

Gian Espinosa
Thanks!
rogue_shadow
Could you show how to use the update function? Thank you
AjayB
I see you have used db.close() at only at one place and cursor.close() at another place. Will that not
lead to issue of open db connections? Anyway I am looking for code that uses synchronized DB
connection to ensure that open collection do not hang the mobile device. DO you know of any good
example?
Ser
Hi folks, I have a question. Why did we create three constructor at Contacts.java?
Dravit Lochan Gupta
Not very sure, but maybe because if the developer puts id as auto incremental. empty constructor if
the default constructor malfunctions or something like that.
raj
it is ok. but how can we add a doc le or pdf le?
Neeraj Pant
how can add contact add in emergency list class from contact list in phone
Jan
Thanks a lot for this amazing tutorial!
cursor.close();
Should be
cursor.close();

return count;
Because now it throws an java.lang.IllegalStateException: attempt to re-open an already-closed
object when you call the getContactsCount() method.
Tushar
Just Wow man … Loved it (y)
Muhammad Maqsood
Tiger….!
Ahmed Aslam
Assalam-o-Alaikum. #Ravi in getContact(). U used this.getReadableDatabase(); but in
getAllContacts(). U used this.getWritableDatabase();. plz explain this. because both methods are
reading data from data base. why this difference. and what is the reason of this?
Ravi Tamada
It’s mistake. As we are not writing anything, the method should be readable db.
Dravit Lochan Gupta
I have a doubt.!
when an object of DatabaseHandler is made in AndroidSQLiteTutorialActivity, onCreate(), method of
DatabaseHandler will be called. won’t it give an error if a table with same name is found in the
system which was made at the time of previous execution of the application.
Dominic Claxton
I’m pretty sure using the helper and this function it creates the database if it doesn’t exist and ignores
this process if it already exists
Dravit Lochan Gupta
Can you explain in detail?
Heba
make sure that the constructor like this

}
Sushant
// In getting all contacts
do{
Asking to pass the “int id, String name, String _phone_number “.
What to write in this constructor?
Please help.
vishwa
Don’t write anything, Empty constructor will handle it.
while adding the contact you should ll something in that.
Hitesh Danidhariya
make an empty constructor
Anto Navis
Great you articles are really useful for me , i am a beginner for developing android app. your website
is so useful for me.
Adedara Klever Olanrewaju
Ravi, how do I set the results to a list view
Jeffy
//your listview
ListView list;
list = (ListView ) ndViewById(R.id.listView);
ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,contacts);

list.setAdapter(adapter)
//this would work
ospfkpoes
Its showing the list in hexadecimal values.. cant gure out what to do!!plz Help!!
Suhail Parvez
Hey Ravi , how do we store an Arraylist into the database table ?
Didn’t get much help in StackOver ow.
I know we have to split the arraylist and insert it one by one.
BUT, how do i store it in the table ?
Ravi Tamada
Can you give me the sample data in your ArrayList?
Suhail Parvez
Thie is the JSON coming in
“staff”: [
“John Doe”,
“2”,
“a”
],
or
“departments”: [
“Waste Management”,
“Medical Gases”,
“Hospital Wards”,
“Waste Compound”,
“BIOCHEMISTRY CHEMICALS”,
“Biochemistry Lab”,
“Catering and Household”,
“CDU”,
“Clinical Engineering”,
“Derrycourt Cleaning Services”,

“EMBU Lab”,
“Emergency”,
“Haematology/ Blood transfusion”,
“Histology”,
“Histology Dyes”,
“Household Services”,
“IMMRL”,
“Industrial Gases”,
“Medical Gases”,
“Metabolic”,
“Microbiology”,
“Mortuary”,
“Neurology”,
“Newborn Screening Lab”,
“Pharmacy”,
“Technical Services”
]
Burak Cakir
Hi Suhail,
It’s late but it might work for someone else. You should store your ArrayList as Json string. Then
when you need it, you can convert JSON string into Java objects by using GSON easily.
Suhail Parvez
I have posted my solution here .
(http://stackover ow.com/questions/39899007/insert-arraylist-in-sqlite-database?
noredirect=1#comment67084738_39899007)
wazaa20003
Ravi, how to select query using List?
Shiven Singh
Amazing tutorial..Really appreciate the effort you put in to make all these sweet tutorials
Thankyou from the whole community.

Leo
My good sir might I ask where is the xml le or how can i connect the database and xml le
ajaxkm
xml?
Kebaa Marush
remember is this example you don’t use any view but rather work with the Logcat,
George Zhao
Hi, thanks for your sharing. It helps me a lot.
But I have a question, I do not understand why you do not add the id into the value in the method
addContact().
shashank tiwari
Sir again needed your help i wanted to drop my sqlite tables but not able to call onupgrade method .is
there any alternate solution to dropping my sqlite tables and then recreating them.
Burak Cakir
Great tutorial Ravi, thanks.
But there is one mistake that you try to re-open the cursor which is already closed in
getContactsCount() method.
it should be xed like this :
cursor.close();
db.close();

return count ;
}
Shameem Ahsan
hi sir if u dont mind give me ur number , need help
james
How do you do it with getContactsById? sorry I’m new to this.
John Kimson Magat
Thanks for this great tutorial
but please someone help me with my problem
how do i put the result in ListView? i already tried it but it only show the last record
Ravi Tamada
Whats the code you are trying?
Keshav Tiwari
@ravi8x:disqus Sir I have the same prob. Its my rst time with databases. I have a custom object and
an adapter. Should I edit my object as Contact ? Should I send you the code?
Sgsh
How do I create the database in one class and then reference it from other classes?
Saathwik Nalige
This tutorial is awesome!!! Really helpful for beginners… have you devoloped any project based on
retro t???
and im getting value of phone number as name(name = ravi,phone_num = ravi) instead of the number
Chris Ryce
Thanks for this amazing tutorial. I’m a beginner in android development and just by your simple steps
of explaining this complex topic of maintaining SQL database in android, I’ve learnt so much.
There is a minor correction in getContactsCount() function. There shouldn’t be cursor.close() line
before the cursor.getCount(). So I think it should be like this, correct me if i’m wrong..

{
//rest of the code…..
int count=cursor.getCount();
cursor.close();
return count;
}
Ravi Tamada
Hi Chris
Thanks for pointing that out. Try reading Realm Database has it has more advantages over SQLite.
http://www.androidhive.info/2016/05/android-working-with-realm-database-replacing-sqlite-core-
data/
Chris Ryce
Can anyone tell me how to use this updateContact() function. And what integer value it is returning?
Ravi Tamada
Hi Chris
The updateContact() takes Contact object which you fetch using getContact() method. Modify the
values of contact object and pass it to updateContact().
Have a look at Realm Database. It’s much easier.
http://www.androidhive.info/2016/05/android-working-with-realm-database-replacing-sqlite-core-
data/
Chris Ryce
Thanks for your reply
Ravi Tamada
Chris Ryce
I have one more question. I have successfully applied the deleteContact() function but when I further

viewed the database, there is no update in the KEY_ID like-
ID NAME PHONE_NO
1 Chris 15654654
2 Andrew 11546586
3 Will 54556585
After deletion of “Andrew” record-
ID NAME PHONE_NO
1 Chris 15654654
3 Will 54556585
See, no change in the key_id like “Will” record should have id=2.
Is this limitations of SQLite or I’m doing something wrong?
Marius Zimta
String CREATE_CONTACTS_TABLE = “CREATE TABLE ” + TABLE_CONTACTS + “(”
+ KEY_ID + ” INTEGER PRIMARY KEY,” + KEY_NAME + ” TEXT,”
+ KEY_PH_NO + ” TEXT” + “)”;
}
in this function key_id is declared as primary key(that means, that the key must be unique). if you
delete your entry you are deleting also the unique key. in this example the primary key is
autoincremented.
Peter
put the internet permission outside permission tags
Peter Amit
application tags
Yogesh
Thank you very much for the code..

Ravi Tamada
You are welcome
Aditya Singh
you are awesome
Ravi Tamada
Lor’themar Theron
Thanks for your guide, but when i run app, its giving me error at three lanes
1. SQLiteDatabase db = this.getWritableDatabase(); // Updating single contact
2. SQLiteDatabase db = this.getWritableDatabase(); //Getting all contact
3. db.execSQL(CREATE_CONTACTS_TABLE); // creating table
What must i do?? When i tried others database examples, they r giving me same error on
getWritableDatabase, db.execSQL methods.
Dimas Prasetio
hey ravi
i wanna ask about this code :
public List getAllContacts() {
List contactList = new ArrayList();
// Select All Query
String selectQuery = “SELECT * FROM ” + TABLE_CONTACTS;
do {

}
return contactList;
}
if adding new value to sqlite and show into arraylist, the previous data not clear.
example :
i insert db.addContact(new Contact(“1”, “1”));
and the output will be :
1,1
and then i insert new one
i insert db.addContact(new Contact(“2”, “2”));
and the output will be :
1,1
2,2
how to change output only showing 2,2 ?
i try put fotolist.clear() before add but not working
whoisnva
If I instantiate the database in the MainActivity and want to access the data inside of a different
Fragment how do I achieve this to make a getAllContacts(); call?
whoisnva
Do I have to pass JSON to SQLlite or can I pass arraylist object direct?

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