Curso de android vox island

Training companion

ANDROID
TUTORIAL
http://android.voxisland.com
(c) 2010 VoxIsland

1

Chapter 2: Getting to know Android
History
In July 2005, Google acquired Android, Inc., a small startup company based in Palo Alto, California, USA. Android's cofounders who went to work at Google included Andy Rubin (co-founder of Danger), Rich Miner (co-founder of Wildfire
Communications, Inc.), Nick Sears (once VP at T-Mobile), and Chris White (headed design and interface development at
WebTV). At the time, little was known about the functions of Android, Inc. other than that they made software for
mobile phones. This began rumors that Google was planning to enter the mobile phone market.
At Google, the team led by Rubin developed a mobile device platform powered by the Linux kernel which they
marketed to handset makers and carriers on the premise of providing a flexible, upgradeable system.[citation needed] It
was reported that Google had already lined up a series of hardware component and software partners and signaled to
carriers that it was open to various degrees of cooperation on their part. More speculation that Google would be
entering the mobile-phone market came in December 2006. Reports from the BBC and The Wall Street Journal noted
that Google wanted its search and applications on mobile phones and it was working hard to deliver that. Print and
online media outlets soon reported rumors that Google was developing a Google-branded handset. More speculation
followed reporting that as Google was defining technical specifications, it was showing prototypes to cell phone
manufacturers and network operators.
Ultimately Google unveiled its smartphone Nexus One that uses the Android open source mobile operating system.
The device is manufactured by Taiwan's HTC Corporation, and became available on January 5, 2010.
source: wikipedia
http://android.voxisland.com - (c) VoxIsland 2010
2

The Open Handset Alliance

Mobile
Operators

Software
Companies

Commercialization
Companies

Semiconductors
Companies

Handset
Manufacturers

China Mobile
KDDI Corporation
NTT DoCoMo
Sprint Nextel
T-Mobile
Telecom Italia
Telefonica

Ascender Corporation
eBay
Esmertec
Google
LivingImage
Myriad Group|Myriad
NMS Communications
Nuance
Communications
PacketVideo
SkyPop
SONiVOX

Aplix
Noser Engineering
The Astonishing Tribe
Wind River Systems

Audience
Broadcom Corporation
Intel Corporation
Marvell Technology
Group
Nvidia Corporation
Qualcomm
SiRF|SiRF Technology
Holdings
Synaptics
Texas Instruments

High Tech Computer
Corporation|HTC
LG
Motorola
Samsung Electronics

Vodafone
Softbank
China Unicom

SVox

Borqs
Omron SW
Teleca
Sasken Comm Tech Ltd

ASUSTek
Garmin
Huawei Tech
Sony Ericsson
Toshiba
Acer

Borqs
Omron SW
Teleca
Sasken Comm Tech Ltd

founding members in bold
as of 03-2010

3

Android application development VS traductionnal development

Power

no need to address

limiting power
consumption is
crucial

big display

small display

CPU

Ghz

hunders of
Mhz

Memory

Gb

Mb

Storage

Tb or Gb

Gb or Mb

LIMITATIONS

2. Re-Usability of components (mashups)
will speed-up developments
3. Interchangeable apps
will speed-up developments

Computer

Screen

1. Limited resources
will slow-down developments

Android
phone

4

Chapter 3: Android development setup
4 download and install steps:
Java SDK
http://developers.sun.com/downloads/
Eclipse
http://www.eclipse.org/downloads/
Android SDK
http://developer.android.com/sdk/index.html
ADT
https://dl-ssl.google.com/android/eclipse

5

Chapter 3: Android development setup
Adding the Android SDK tools to your system's PATH:
MAC OS
go in your home directory
edit (or create) .bash_proﬁle
add the complete path to tools in the PATH variable (coma separated)
example: export PATH=${PATH}:/Developer/android-sdk-mac_86/tools/
GNU/LINUX
go in your home directory
edit .bash_proﬁle or .bash_rc
add the complete path to tools in the PATH variable (coma separated)
example: export PATH=${PATH}:/Developer/android-sdk-mac_86/tools/
WINDOWS
Explorer - right click on My Computer - click on Properties - click on Advanced tab - click on Environment
variable - double click on PATH - adding the path to tools in the variable
6

Chapter 4: Android development with Eclipse
BabySteps project:

package com.voxisland;
import android.app.Activity;
import android.os.Bundle;
public class BabySteps extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}

7

JAVA perspective:

8

DDMS perspective:

9

DEBUG perspective:

10

Chapter 5: Hello Android project structure
R.java class:

/* AUTO-GENERATED FILE. DO NOT MODIFY.
*
* This class was automatically generated by the
* aapt tool from the resource data it found. It
* should not be modified by hand.
*/

public final class R {
public static final class attr {
}
public static final class drawable {
public static final int icon=0x7f020000;
}
public static final class layout {
public static final int main=0x7f030000;
}
public static final class string {
public static final int app_name=0x7f040001;
public static final int hello=0x7f040000;
}
}

11

AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.voxisland"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".BabySteps"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="7" />
</manifest>

12

main.xml (layout):
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button

android:text="@+id/Button01"

android:id="@+id/Button01"


android:layout_height="wrap_content">
</Button>
<Button

android:text="hello"

android:id="@+id/Button02"


android:layout_height="wrap_content">
</Button>
</LinearLayout>

13

strings.xml:

<resources>
<string name="hello">Hello Chapter 4!</string>
<string name="app_name">Baby Steps</string>
</resources>

14

AndroidManifest.xml:
<activity android:name=".BabySteps"
<intent-filter>
</intent-filter>
</activity>
</application>
</manifest>

15

Chapter 6,7,8: The Joshua Project
The project once completed:

16

Layout:
A

B

C

<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
>
<TextView
android:id="@+id/myMessage"
/>
<LinearLayout



android:orientation="horizontal" >
D

E

<Button

android:layout_width="wrap_content"


android:id="@+id/myButton"

android:text="@string/answer"
/>
<CheckBox



android:id="@+id/iSpeakFrench"

android:text="Je parle FranÃ§ais"

android:checked="false"

android:textSize="5pt"/>


F

<LinearLayout


android:layout_height="20px"

android:orientation="horizontal">
G

H

I

<TextView



android:layout_weight="1"

android:gravity="center"

android:background="#ff0000"

android:textColor="#000000"

android:text="red" />
<TextView





android:background="#00ff00"


android:text="green" />

<TextView





android:background="#0000ff"


android:text="blue" />
</LinearLayout>

J

<RadioGroup



android:id="@+id/myRadioGroup"

android:orientation="horizontal">
K

<RadioButton



android:layout_marginLeft="35dp"


android:id="@+id/myRadioButtonRed"/>
<RadioButton





android:id="@+id/myRadioButtonGreen"/>
<RadioButton





android:id="@+id/myRadioButtonBlue"/>

L

M

</RadioGroup>

</LinearLayout>

</LinearLayout>

17


Layout:

B

D

E
G

H

I

C

F
K

L

M

J

A

18

Joshua class:

import
import
import
import
import
import
import
import
import
import

android.app.Activity;
android.graphics.Color;
android.os.Bundle;
android.view.View;
android.view.View.OnClickListener;
android.widget.Button;
android.widget.CheckBox;
android.widget.RadioButton;
android.widget.TextView;
android.widget.Toast;

public class Joshua extends Activity {
TextView myMessage;
OnClickListener myRadioClickListener;

@Override

final Button myButton=(Button)findViewById
(R.id.myButton);

final CheckBox iSpeakFrench=(CheckBox)findViewById
(R.id.iSpeakFrench);
iSpeakFrench.setOnClickListener(new
OnClickListener(){
@Override

public void onClick(View v) {

CheckBox v2=(CheckBox)v;

if (v2.isChecked()) {

myButton.setText("Salut Joshua");

} else {

myButton.setText("Hello Joshua");

}

}
} );
myButton.setOnClickListener(new
Button.OnClickListener() {
@Override


if (iSpeakFrench.isChecked()) {

Toast.makeText(Joshua.this,
R.string.joshuareponse, Toast.LENGTH_LONG).show
();

} else {

Toast.makeText(Joshua.this,
R.string.joshuaanswer, Toast.LENGTH_LONG).show();

}

}
});

myMessage=(TextView)findViewById(R.id.myMessage);
myRadioClickListener=new OnClickListener() {
@Override
RadioButton myRadioButton=(RadioButton)v;

switch(myRadioButton.getId()) {

case R.id.myRadioButtonRed:

myMessage.setTextColor(Color.RED);

break;

case R.id.myRadioButtonGreen:

myMessage.setTextColor(Color.GREEN);

break;

case R.id.myRadioButtonBlue:

myMessage.setTextColor(Color.BLUE);

break;

}

}
};
RadioButton rbred, rbgreen,rbblue;
rbred=(RadioButton)findViewById
(R.id.myRadioButtonRed);
rbgreen=(RadioButton)findViewById
(R.id.myRadioButtonGreen);
rbblue=(RadioButton)findViewById
(R.id.myRadioButtonBlue);
rbred.setOnClickListener(myRadioClickListener);
rbgreen.setOnClickListener(myRadioClickListener);
rbblue.setOnClickListener(myRadioClickListener);
}
}

19

SimpleList class (1/2):

Chapter 9: Lists
import java.util.ArrayList;
import java.util.Arrays;
import
import
import
import
import
import
import
import
import

android.app.AlertDialog;
android.app.ListActivity;
android.content.Context;
android.content.DialogInterface;
android.os.Bundle;
android.view.View;
android.widget.AdapterView;
android.widget.ArrayAdapter;
android.widget.AdapterView.OnItemLongClickListener;

public class SimpleList extends ListActivity {

String[] firstNames = {

"Abigail", "Alexander", "Alexis", "Alyssa", "Andrew", "Anna", "Anthony", "Ashley",

"Austin", "Ava", "Benjamin", "Brandon", "Brianna", "Caleb", "Chloe", "Christian",

"Christopher", "Daniel", "David", "Destiny", "Dylan", "Elijah", "Elizabeth", "Emma",

"Ethan", "Gabriel", "Grace", "Hailey", "Hannah", "Isabella", "James", "Jasmine",

"Jennifer", "Jessica", "John", "Jonathan", "Jose", "Joseph", "Joshua", "Julia",

"Justin", "Kaitlyn", "Katherine", "Kayla", "Kevin", "Lauren", "Logan", "Madison",

"Matthew", "Megan", "Mia", "Michael", "Morgan", "Natalie", "Nathan", "Nicholas",

"Noah", "Olivia", "Rachel", "Robert", "Ryan", "Samantha", "Samuel", "Sarah",

"Sophia", "Sydney", "Taylor", "Thomas", "Tyler", "Victoria", "William", "Zachary"

};
ArrayAdapter<String> adapter;
private String itemSelected;
private final Context context = this;

20

Chapter 9: Lists

SimpleList class (2/2):

@Override public void onCreate(Bundle savedInstanceState) {

OnItemLongClickListener itemDelListener = new OnItemLongClickListener() {

@Override

public boolean onItemLongClick(AdapterView<?> parent, View arg1,

int position, long arg3) {

itemSelected=parent.getItemAtPosition(position).toString();

AlertDialog.Builder builder = new AlertDialog.Builder(context);

builder.setMessage("Do you really want to delete "+itemSelected+"?");

builder.setCancelable(false);

builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

adapter.remove(itemSelected);

adapter.notifyDataSetChanged();

}

});

builder.setNegativeButton("No", new DialogInterface.OnClickListener() {

@Override


dialog.cancel();

}

});

builder.show();

return false;

}
};
ArrayList<String> myList = new ArrayList<String>(Arrays.asList(firstNames));
adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myList);
setListAdapter(adapter);
getListView().setOnItemLongClickListener(itemDelListener);

}
}

21

Chapter 10: Lists
ArrayAdapter:
A ListAdapter that manages a ListView backed by
an array of arbitrary objects. By default this class
expects that the provided resource id references a
single TextView. If you want to use a more complex
layout, use the constructors that also takes a field
id. That field id should reference a TextView in the
larger layout resource. However the TextView is
referenced, it will be filled with the toString() of
each object in the array. You can add lists or arrays
of custom objects. Override the toString() method
of your objects to determine what text will be
displayed for the item in the list. To use something
other than TextViews for the array display, for
instance, ImageViews, or to have some of data
besides toString() results fill the views, override
getView(int, View, ViewGroup) to return the type of
view you want.

Public Methods
void
add(T object)
Adds the specified object at the end of the array.
void
clear()
Remove all elements from the list.
Context
getContext()
Returns the context associated with this array adapter.
int
getCount()
View

T

getDropDownView(int position, View convertView, ViewGroup parent)
Get a View that displays in the drop down popup the data at the specified position in the data set.
getFilter()
Returns a filter that can be used to constrain data with a filtering pattern.
getItem(int position)

long

getItemId(int position)

int

getPosition(T item)
Returns the position of the specified item in the array.
getView(int position, View convertView, ViewGroup parent)

Filter

View
void
void
void
void
void
void

insert(T object, int index)
Inserts the specified object at the specified index in the array.
notifyDataSetChanged()
Notifies the attached View that the underlying data has been changed and it should refresh itself.
remove(T object)
Removes the specified object from the array.
setDropDownViewResource(int resource)
Sets the layout resource to create the drop down views.
setNotifyOnChange(boolean notifyOnChange)
Control whether methods that change the list (add(T), insert(T, int), remove(T), clear())
automatically call notifyDataSetChanged().
sort(Comparator<? super T> comparator)
Sorts the content of this adapter using the specified comparator.

22

Chapter 10: Long clicks
Deﬁnition:
The long click/touching is a gesture used on Android mobile devices. Long click/touching is touching an item and
pressing for a few seconds. Long clicks/touches on applications allows you to move them to the desktop, and long
touches on the desktop clock allow you to remove it.

getListView().setOnItemLongClickListener(itemDelListener);

23

Chapter 11: Dialog boxes

Adding a dialog box to the list example:

@Override
public boolean onItemLongClick(AdapterView<?> parent, View arg1, int position, long arg3) {






@Override




}

});


}

@Override


dialog.cancel();

}
});

builder.show();

return false;

24


Adding a dialog box to the list example:

@Override
public boolean onItemLongClick(AdapterView<?> parent, View arg1, int position, long arg3) {






@Override




}

});


}

@Override


dialog.cancel();

}
});

builder.show();

return false;

25

AlertDialog builder 1/3:


Public Methods
AlertDialog create()
Creates a AlertDialog with the arguments supplied to this builder.
AlertDialog.Builder setAdapter(ListAdapter adapter, DialogInterface.OnClickListener listener)
Set a list of items, which are supplied by the given ListAdapter, to be displayed
in the dialog as the content, you will be notified of the selected item via the supplied
listener.
AlertDialog.Builder setCancelable(boolean cancelable)
Sets whether the dialog is cancelable or not default is true.
AlertDialog.Builder setCursor(Cursor cursor, DialogInterface.OnClickListener listener, String
labelColumn)
Set a list of items, which are supplied by the given Cursor, to be displayed in the
dialog as the content, you will be notified of the selected item via the supplied
listener.
AlertDialog.Builder setCustomTitle(View customTitleView)
Set the title using the custom view customTitleView.
AlertDialog.Builder setIcon(Drawable icon)
Set the Drawable to be used in the title.
AlertDialog.Builder setIcon(int iconId)
Set the resource id of the Drawable to be used in the title.
AlertDialog.Builder setInverseBackgroundForced(boolean useInverseBackground)
Sets the Dialog to use the inverse background, regardless of what the contents is.
AlertDialog.Builder setItems(int itemsId, DialogInterface.OnClickListener listener)
Set a list of items to be displayed in the dialog as the content, you will be notified of
the selected item via the supplied listener.
AlertDialog.Builder setItems(CharSequence[] items, DialogInterface.OnClickListener listener)
AlertDialog.Builder setMessage(int messageId)
Set the message to display using the given resource id.

26



AlertDialog.Builder setMessage(CharSequence message)
Set the message to display.
AlertDialog.Builder setMultiChoiceItems(Cursor cursor, String isCheckedColumn, String labelColumn,
DialogInterface.OnMultiChoiceClickListener listener)
AlertDialog.Builder setMultiChoiceItems(int itemsId, boolean[] checkedItems,
AlertDialog.Builder setMultiChoiceItems(CharSequence[] items, boolean[] checkedItems,
AlertDialog.Builder setNegativeButton(CharSequence text, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the negative button of the dialog is pressed.
AlertDialog.Builder setNegativeButton(int textId, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the negative button of the dialog is pressed.
AlertDialog.Builder setNeutralButton(int textId, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the neutral button of the dialog is pressed.
AlertDialog.Builder setNeutralButton(CharSequence text, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the neutral button of the dialog is pressed.
AlertDialog.Builder setOnCancelListener(DialogInterface.OnCancelListener onCancelListener)
Sets the callback that will be called if the dialog is canceled.
AlertDialog.Builder setOnItemSelectedListener(AdapterView.OnItemSelectedListener listener)
Sets a listener to be invoked when an item in the list is selected.
AlertDialog.Builder setOnKeyListener(DialogInterface.OnKeyListener onKeyListener)
Sets the callback that will be called if a key is dispatched to the dialog.

27



AlertDialog.Builder setPositiveButton(CharSequence text, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the positive button of the dialog is pressed.
AlertDialog.Builder setPositiveButton(int textId, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the positive button of the dialog is pressed.
AlertDialog.Builder setSingleChoiceItems(int itemsId, int checkedItem, DialogInterface.OnClickListener
listener)
AlertDialog.Builder setSingleChoiceItems(CharSequence[] items, int checkedItem,
DialogInterface.OnClickListener listener)
AlertDialog.Builder setSingleChoiceItems(ListAdapter adapter, int checkedItem,
AlertDialog.Builder setSingleChoiceItems(Cursor cursor, int checkedItem, String labelColumn,
AlertDialog.Builder setTitle(int titleId)
Set the title using the given resource id.
AlertDialog.Builder setTitle(CharSequence title)
Set the title displayed in the Dialog.
AlertDialog.Builder setView(View view)
Set a custom view to be the contents of the Dialog.
AlertDialog show()
Creates a AlertDialog with the arguments supplied to this builder and show()'s
the dialog.

28

Intents1 class 1/2:

Chapter 12: Intents 1

import
import
import
import
import

android.content.Intent;
android.os.Bundle;
android.view.View;

public class Intents1 extends Activity {
/** Called when the activity is first created. */
@Override
Button myGalleryButton = (Button)findViewById(R.id.myGalleryButton);
Button myCallLogButton = (Button)findViewById(R.id.myCallLogButton);
Button myContactBookButton = (Button)findViewById(R.id.myContactBookButton);

myGalleryButton.setOnClickListener(new Button.OnClickListener() {

@Override


Intent myIntent = new Intent();

myIntent.setAction(Intent.ACTION_VIEW);

myIntent.setData(android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI);

startActivity(myIntent);

}
});

29

Intents1 class 2/2:


myCallLogButton.setOnClickListener(new Button.OnClickListener() {

@Override



myIntent.setAction(Intent.ACTION_CALL_BUTTON);


}
});

myContactBookButton.setOnClickListener(new Button.OnClickListener() {

@SuppressWarnings("deprecation")

@Override



myIntent.setAction(Intent.ACTION_VIEW);

myIntent.setData(android.provider.Contacts.People.CONTENT_URI);


}
});

}
}

30

Activity1 class:


import
import
import
import
import

android.os.Bundle;
android.view.View;

public class Activity1 extends Activity {
@Override
Button button = (Button)findViewById(R.id.goto2);
button.setOnClickListener(new Button.OnClickListener() {

});

@Override

Intent intent = new Intent(v.getContext(), Activity2.class);
startActivity(intent);
}

}
}

31


Activity2 class:
import
import
import
import
import

android.os.Bundle;
android.view.View;

public class Activity2 extends Activity{
@Override
setContentView(R.layout.main2);
Button button = (Button)findViewById(R.id.goback);
button.setOnClickListener(new Button.OnClickListener() {

});

@Override

Intent intent = new Intent();
setResult(RESULT_OK, intent);
finish();
}

}
}

32

Standard actions:
ACTION_MAIN
ACTION_VIEW
ACTION_ATTACH_DATA
ACTION_EDIT
ACTION_PICK
ACTION_CHOOSER
ACTION_GET_CONTENT
ACTION_DIAL
ACTION_CALL
ACTION_SEND
ACTION_SENDTO
ACTION_ANSWER
ACTION_INSERT
ACTION_DELETE
ACTION_RUN
ACTION_SYNC
ACTION_PICK_ACTIVITY
ACTION_SEARCH
ACTION_WEB_SEARCH
ACTION_FACTORY_TEST

33

Standard boradcast actions:
ACTION_TIME_TICK
ACTION_TIME_CHANGED
ACTION_TIMEZONE_CHANGED
ACTION_BOOT_COMPLETED
ACTION_PACKAGE_ADDED
ACTION_PACKAGE_CHANGED
ACTION_PACKAGE_REMOVED
ACTION_PACKAGE_RESTARTED
ACTION_PACKAGE_DATA_CLEARED
ACTION_UID_REMOVED
ACTION_BATTERY_CHANGED
ACTION_POWER_CONNECTED
ACTION_POWER_DISCONNECTED
ACTION_SHUTDOWN

34

Standard boradcast actions:
ACTION_TIME_TICK
ACTION_TIME_CHANGED
ACTION_TIMEZONE_CHANGED
ACTION_BOOT_COMPLETED
ACTION_PACKAGE_ADDED
ACTION_PACKAGE_CHANGED
ACTION_PACKAGE_REMOVED
ACTION_PACKAGE_RESTARTED
ACTION_PACKAGE_DATA_CLEARED
ACTION_UID_REMOVED
ACTION_BATTERY_CHANGED
ACTION_POWER_CONNECTED
ACTION_POWER_DISCONNECTED
ACTION_SHUTDOWN

35

Standard categories:

CATEGORY_DEFAULT
CATEGORY_BROWSABLE
CATEGORY_TAB
CATEGORY_ALTERNATIVE
CATEGORY_SELECTED_ALTERNATIVE
CATEGORY_LAUNCHER
CATEGORY_INFO
CATEGORY_HOME
CATEGORY_PREFERENCE
CATEGORY_TEST
CATEGORY_CAR_DOCK
CATEGORY_DESK_DOCK

36

Standard extra data:
EXTRA_ALARM_COUNT
EXTRA_BCC
EXTRA_CC
EXTRA_CHANGED_COMPONENT_NAME
EXTRA_DATA_REMOVED
EXTRA_DOCK_STATE
EXTRA_DOCK_STATE_CAR
EXTRA_DOCK_STATE_DESK
EXTRA_DOCK_STATE_UNDOCKED
EXTRA_DONT_KILL_APP
EXTRA_EMAIL
EXTRA_INITIAL_INTENTS
EXTRA_INTENT
EXTRA_KEY_EVENT

EXTRA_PHONE_NUMBER
EXTRA_REMOTE_INTENT_TOKEN
EXTRA_REPLACING
EXTRA_SHORTCUT_ICON
EXTRA_SHORTCUT_ICON_RESOURCE
EXTRA_SHORTCUT_INTENT
EXTRA_STREAM
EXTRA_SHORTCUT_NAME
EXTRA_SUBJECT
EXTRA_TEMPLATE
EXTRA_TEXT
EXTRA_TITLE
EXTRA_UID

37

Chapter 14: Option and Context menus
import
import
import
import
import

Options Menu

android.os.Bundle;
android.view.Menu;
android.view.MenuItem;

public class JAOptionsMenu extends Activity {
@Override
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
TextView tv = (TextView)findViewById(R.id.tv);
tv.setText("YOU PUSHED ITEM #"+String.valueOf(item.getItemId()));
return true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, Menu.FIRST,
Menu.NONE, "ONE").setIcon(R.drawable.barcode);
menu.add(0, Menu.FIRST+1, Menu.NONE, "TWO").setIcon(R.drawable.cards);
menu.add(0, Menu.FIRST+2, Menu.NONE, "THREE").setIcon(R.drawable.chart);
menu.add(0, Menu.FIRST+3, Menu.NONE, "FOUR").setIcon(R.drawable.clock);
menu.add(0, Menu.FIRST+4, Menu.NONE, "FIVE").setIcon(R.drawable.cloud);
menu.add(0, Menu.FIRST+5, Menu.NONE, "SIX").setIcon(R.drawable.dialog);
menu.add(0, Menu.FIRST+6, Menu.NONE, "SEVEN").setIcon(R.drawable.dice);
menu.add(0, Menu.FIRST+7, Menu.NONE, "HEIGHT").setIcon(R.drawable.disc);
return true;
}
}

38

Chapter 14: Option and Context menus
import
import
import
import
import
import
import
import
import

android.os.Bundle;
android.view.ContextMenu;
android.view.Menu;
android.view.MenuItem;
android.view.View;
android.view.ContextMenu.ContextMenuInfo;

Context Menu

public class JAContextMenu extends Activity {
@Override
TextView tv = (TextView)findViewById(R.id.tv);
tv.setOnCreateContextMenuListener(this);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, view, menuInfo);
menu.setHeaderTitle("Context menu");
menu.add(0, Menu.FIRST,
Menu.NONE, "EDIT");
menu.add(0, Menu.FIRST+1, Menu.NONE, "DELETE");
menu.add(0, Menu.FIRST+2, Menu.NONE, "ADD");
}
@Override
public boolean onContextItemSelected(MenuItem item) {
Toast.makeText(getApplicationContext(), item.getTitle().toString(), Toast.LENGTH_SHORT).show();
return true;
}
}

39

Chapter 15: Localization
1. Design your application
2. Choose your localization strategy: which countries, which languages?
3. Use no hard-coded strings or string constants; use R.string and strings.xml files.
4. Use no hard-coded drawables or layouts; use R.drawable and R.layout
5. Translate your strings files; localize your drawables.
6. Place your localized resources in the appropriate directories under 'res/'.
7. Create your final build or builds, using 'aapt' as necessary.
8. Upload your .apk file or files to Market, selecting the appropriate languages as you upload.
40

Chapter 16: Databases
import
import
import
import
import
import
import
import
import
import

android.content.ContentValues;
android.content.Context;
android.database.Cursor;
android.database.sqlite.SQLiteDatabase;
android.os.Bundle;
android.view.View;
android.view.View.OnClickListener;

public class MyDatabaseDemo extends Activity {

private static final String DATABASE_NAME = "JADB.db";

private static final String DATABASE_TABLE = "myTable";

private static final String DATABASE_CREATE = "create table "+DATABASE_TABLE+" (_id integer
primary key autoincrement, col1 text not null);";

@Override
Button
Button
Button
Button

butCreate
butAdd
butCount
butShow

=
=
=
=

(Button)findViewById(R.id.myButCreate);
(Button)findViewById(R.id.myButAdd);
(Button)findViewById(R.id.myButCount);
(Button)findViewById(R.id.myButShow);

// MORE HERE
}
}

41


@Override
Button
Button
Button
Button

butCreate
butAdd
butCount
butShow

=
=
=
=

(Button)findViewById(R.id.myButCreate);
(Button)findViewById(R.id.myButAdd);
(Button)findViewById(R.id.myButCount);
(Button)findViewById(R.id.myButShow);

butCreate.setOnClickListener(new OnClickListener() {

@Override


SQLiteDatabase myDB;

myDB = openOrCreateDatabase(DATABASE_NAME, Context.MODE_PRIVATE, null);

myDB.execSQL(DATABASE_CREATE);

myDB.close();

Toast.makeText(getApplicationContext(), "Table created",
Toast.LENGTH_SHORT).show();

}

});

42


butAdd.setOnClickListener(new OnClickListener() {

});

@Override



ContentValues newRow = new ContentValues();

newRow.put("col1", "ok");

myDB.insert(DATABASE_TABLE, null, newRow);

myDB.close();

Toast.makeText(getApplicationContext(), "row added", Toast.LENGTH_SHORT).show();
}

43


butCount.setOnClickListener(new OnClickListener() {

});

@Override



String[] resultColumns = new String[] {"_id", "col1"};

Cursor allRows = myDB.query(DATABASE_TABLE, resultColumns, null, null, null, null, null, null);

Integer c = allRows.getCount();

myDB.close();

Toast.makeText(getApplicationContext(), "count: "+c.toString(), Toast.LENGTH_SHORT).show();
}

44


butShow.setOnClickListener(new OnClickListener() {

}

@Override

String[] resultColumns = new String[] {"_id", "col1"};
Cursor allRows = myDB.query(DATABASE_TABLE, resultColumns, null, null, null, null, null, null);
String res = "RESULT IS:";
Integer cindex = allRows.getColumnIndex("col1");
if (allRows.moveToFirst()) {

do {

res += allRows.getString(cindex)+"-";

} while (allRows.moveToNext());
}
myDB.close();

Toast.makeText(getApplicationContext(), res, Toast.LENGTH_SHORT).show();

45

SQLite survival commands:
.backup ?DB? FILE
.bail ON|OFF
.databases
.dump ?TABLE? ...
.echo ON|OFF
.exit
.explain ON|OFF
.genfkey ?OPTIONS?

.header(s) ON|OFF
.help
.import FILE TABLE
.indices TABLE
.iotrace FILE
.load FILE ?ENTRY?
.mode MODE ?TABLE?

Backup DB (default "main") to FILE
Stop after hitting an error. Default OFF
List names and files of attached databases
Dump the database in an SQL text format
Turn command echo on or off
Exit this program
Turn output mode suitable for EXPLAIN on or off.
Options are:
--no-drop: Do not drop old fkey triggers.
--ignore-errors: Ignore tables with fkey errors
--exec: Execute generated SQL immediately
See file tool/genfkey.README in the source
distribution for further information.
Turn display of headers on or off
Show this message
Import data from FILE into TABLE
Show names of all indices on TABLE
Enable I/O diagnostic logging to FILE
Load an extension library
Set output mode where MODE is one of:
csv
Comma-separated values
column
Left-aligned columns. (See .width)
html
HTML <table> code
insert
SQL insert statements for TABLE
line
One value per line
list
Values delimited by .separator string
tabs
Tab-separated values
tcl
TCL list elements

.nullvalue STRING
.output FILENAME
.output stdout
.prompt MAIN CONTINUE
.quit
.read FILENAME
.restore ?DB? FILE
.schema ?TABLE?
.separator STRING
.show
.tables ?PATTERN?
.timeout MS
.timer ON|OFF
.width NUM NUM ...
sqlite>

Print STRING in place of NULL values
Send output to FILENAME
Send output to the screen
Replace the standard prompts
Exit this program
Execute SQL in FILENAME
Restore content of DB (default "main") from FILE
Show the CREATE statements
Change separator used by output mode and .import
Show the current values for various settings
List names of tables matching a LIKE pattern
Try opening locked tables for MS milliseconds
Turn the CPU timer measurement on or off
Set column widths for "column" mode

46

SQLite command line examples:

Adding a Column to a Table

Open/Create a Database

alter table {table name} ADD '{column name}' {data type};

This is done using the command line program.

Ex:

sqlite3 {database file name}

alter table my_things ADD 'description' varchar(50);

Ex:

Deleting a table

sqlite3 my_stuff_database.db

drop table {table name};

If the database exists it will be opened, if it doesn’t exist, it will be created.

Ex:

Print the database structure

drop table my_things;

.schema

Inserting Data into a Table

Print database structure and data

insert into {table name} values ({data}, {more data}, '{yet
more data}');

.dump

Ex:

Turn on column names on query results

.explain on

insert into my_things values (1, 'My first thing', 'It is
nice');

To turn it off do:

Transactions

.explain off

begin transaction;

Creating Tables

something

create table {table name} ('{column name}'
primary key, '{column name}' {data type});

{data

type}

commit;
Output query results to a ﬁle

Ex:

CREATE TABLE my_data('id' int primary key, 'name' varchar
(20), 'description' varchar(10));

.output {filename.txt}

47

Chapter 17: More on layouts
Most common layouts:
LinearLayout: when the order of arrangements of widgets/views of the layout needs to be horizontal or vertical manner, the
LinearLayout widget comes in handy. The direction of arrangement can be set to horizontal or vertical, default being horizontal.
TableLayout : as the name suggests, this layout object is used when the layout has widgets/views that need to be arranged into
rows and columns. This is similar to html tables. The cells can span columns. The TableLayout do not display its border. The
columns can be made to shrink and stretch by setting the respective properties. TableRow is another helper widget which should
be used in conjunction with the TableLayout.
RelativeLayout : when the position of each of the widgets/view is in relative/dependent to each other, then a relative layout is used.
That is for example, when a layout is needed such that it has a text view just to the left of an Edit Textbox, and a button just below
the EditText. The relation between the views are taken care in one iteration, hence if view B’s position is dependent on view A’s
position, view A must come first in the layout.
FrameLayout : this is a very simply layout which is used to hold a section of the screen blank, for displaying an item or group of
items at run time. All the elements added in the framelayout will be added to the top left of the screen.
AbsoluteLayout : when there is a need is to specify exact x and y co-ordinate position of the view, then AbsoluteLayout need to be
used. This layout should not be used as far as possible as it is difficult to maintain.
ListView: used to display list of items in a vertically scrolling list. ListView has many optimizations that are important for large lists.
ScrollView is used for vertically scrolling in which an infinite amount of space is given to the container to hold all the elements of the
view. A ScrollView should have one child which has the elements to be scrolled. A ScrollView cannot be used in conjunction with a
ListView since the list views optimizations will be nullified in effect.

48

LinearLayout

Example

Result

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
>
<TextView
android:layout_width="105px"
/>
<Button
android:text="Button"
android:layout_gravity="right"
android:layout_weight="0.2"
/>
<EditText
android:textSize="18sp"
android:layout_weight="0.8"
/>
</LinearLayout>

49

TableLayout

Example

<TableLayout
android:background="#000044">
<TableRow>
<TextView
android:text="User Name:"
android:width ="120px"
/>
<EditText
android:id="@+id/txtUserName"
android:width="200px" />
</TableRow>
<TableRow>
<TextView
android:text="Password:"
/>
<EditText
android:id="@+id/txtPassword"
android:password="true"
/>
</TableRow>
<TableRow>
<TextView />
<CheckBox android:id="@+id/chkRememberPassword"
android:text="Remember Password"
/>
</TableRow>
<TableRow>
<Button
android:id="@+id/buttonSignIn"
android:text="Log In" />
</TableRow>
</TableLayout>

Result

50

RelativeLayout

Example

<RelativeLayout
android:id="@+id/RLayout"
>
<TextView
android:id="@+id/lblComments"
android:text="Comments"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
/>
<EditText
android:id="@+id/txtComments"
android:layout_height="170px"
android:textSize="18sp"
android:layout_alignLeft="@+id/lblComments"
android:layout_below="@+id/lblComments"
android:layout_centerHorizontal="true"
/>
<Button
android:id="@+id/btnSave"
android:text="Save"
android:layout_below="@+id/txtComments"
android:layout_alignRight="@+id/txtComments"
/>
<Button
android:id="@+id/btnCancel"
android:text="Cancel"
android:layout_below="@+id/txtComments"
android:layout_alignLeft="@+id/txtComments"
/>
</RelativeLayout>

Result

51

FrameLayout


Example
<AbsoluteLayout
android:id="@+id/widget68"
xmlns:android="http://schemas.android.com/apk/
res/android"
>
<FrameLayout
android:layout_x="50px"
android:layout_y="50px"
>
<ImageView
android:src = "@drawable/logo"
/>
</FrameLayout>
</AbsoluteLayout>

Result

52

AbsoluteLayout


Example
<AbsoluteLayout
>
<FrameLayout
android:layout_x="50px"
android:layout_y="50px"
>
<ImageView
android:src = "@drawable/logo"
/>
<Button
android:text="Hello"
/>
</FrameLayout>
</AbsoluteLayout>

Result

53

ScrollView


<ScrollView
>
<LinearLayout
android:orientation="vertical">
<Button
android:id="@+id/button1"
android:text="Button 1"/>
<Button
<Button
<EditText
android:id="@+id/txt"
android:layout_height="300px"/>
<Button
<Button
</LinearLayout>
</ScrollView>

Example
Result

SCROLL

54

Chapter 18: Services and background processing
Class ServiceDemo:

public class ServiceDemo extends Activity {

Context savedThis = this;

@Override
Button startButton = (Button)findViewById(R.id.start);
Button stopButton = (Button)findViewById(R.id.stop);

startButton.setOnClickListener(new OnClickListener() {

@Override


// start the service

startService(new Intent(savedThis, MyService.class));

}
});

stopButton.setOnClickListener(new OnClickListener() {

@Override


// stop the service

stopService(new Intent(savedThis, MyService.class));

}
});

}
}

55

Class ServiceDemo:

import
import
import
import
import

android.app.Service;
android.media.MediaPlayer;
android.os.IBinder;

public class MyService extends Service {

MediaPlayer player;

@Override public IBinder onBind(Intent intent) {

return null;

}

@Override public void onCreate() {

Toast.makeText(this, "MyService Created", Toast.LENGTH_SHORT).show();

player = MediaPlayer.create(this, R.raw.cendrillon);

player.setLooping(false);

}

@Override public void onStart(Intent intent, int startid) {

Toast.makeText(this, "MyService Started", Toast.LENGTH_SHORT).show();

player.start();

}

@Override public void onDestroy() {

player.stop();

}
}

56

Layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
>
<TextView
android:text="@string/hello" />
<Button



android:id="@+id/start"

android:text="Start"/>
<Button



android:id="@+id/stop"

android:text="Stop"/>

</LinearLayout>

57

ServiceDemo manifest:
<activity android:name=".ServiceDemo"
<intent-filter>
</intent-filter>
</activity>
<service android:enabled="true" android:name=".MyService" />
</application>
</manifest>

58

See the services (only Android 2.0 and +):
Android 2.0 introduced a new "Running Services" activity available from the Application system settings. When brought up, it looks something like the left picture.

The main content is a list of all running services that may be of interest to the user, organized by the processes they run in. In the example here, we see three services:
•

GTalkService is part of the standard Google application suit; it is running in Google's "gapps" process, which currently consumes 6.8MB. It has been started for 3
hours 55 minutes, which on this device is the time from when it was first booted.
•
ActivityService is part of the Phonebook app, and its process consumes 4MB. This also has been running since boot.
•
SoftKeyboard is a third party input method. It has been running since I switched to it, about 4 minutes ago.
The user can tap on any of these services to control it; for normal services that are running because they were explicitly started, this will present a dialog allowing the
user to explicitly stop it (right picture).

59

Chapter 19: Security and permissions
requesting permissions
syntax:

<uses-permission android:name="string" />

examples:

<uses-permission
android:name="android.permission.ACCESS_LOCATION" />
<uses-permission
android:name="android.permission.ACCESS_GPS" />

60

requiring permissions
syntax:
<permission
android:description="string resource"
android:icon="drawable resource"
android:label="string resource"
android:name="string"
android:permissionGroup="string"
android:protectionLevel=["normal" | "dangerous" | "signature" | "signatureOrSystem"] />

examples:
<permission android:name="com.me.app.myapp.permission.DEADLY_ACTIVITY"
android:label="@string/permlab_deadlyActivity"
android:description="@string/permdesc_deadlyActivity"
android:permissionGroup="android.permission-group.COST_MONEY"
android:protectionLevel="dangerous" />

61

permissions 1/2


ACCESS_CHECKIN_PROPERTIES
Allows read/write access to the "properties" table in the checkin
database, to change values that get uploaded.
ACCESS_COARSE_LOCATION
Allows an application to access coarse (e.g., Cell-ID, WiFi)
location
ACCESS_FINE_LOCATION
Allows an application to access fine (e.g., GPS) location
ACCESS_LOCATION_EXTRA_COMMANDS
Allows an application to access extra location provider commands
ACCESS_MOCK_LOCATION
Allows an application to create mock location providers for testing
ACCESS_NETWORK_STATE
Allows applications to access information about networks
ACCESS_SURFACE_FLINGER
Allows an application to use SurfaceFlinger's low level features
ACCESS_WIFI_STATE
Allows applications to access information about Wi-Fi networks
ACCOUNT_MANAGER
Allows applications to call into AccountAuthenticators.
AUTHENTICATE_ACCOUNTS
Allows an application to act as an AccountAuthenticator for the
AccountManager
BATTERY_STATS
Allows an application to collect battery statistics
BIND_APPWIDGET
Allows an application to tell the AppWidget service which
application can access AppWidget's data.
BIND_INPUT_METHOD
Must be required by input method services, to ensure that only the
system can bind to them.
BLUETOOTH
Allows applications to connect to paired bluetooth devices
BLUETOOTH_ADMIN
Allows applications to discover and pair bluetooth devices
BRICK
Required to be able to disable the device (very dangerous!).
BROADCAST_PACKAGE_REMOVED
Allows an application to broadcast a notification that an application
package has been removed.

BROADCAST_SMS
Allows an application to broadcast an SMS receipt notification
BROADCAST_STICKY
Allows an application to broadcast sticky intents.
BROADCAST_WAP_PUSH
Allows an application to broadcast a WAP PUSH receipt
notification
CALL_PHONE
Allows an application to initiate a phone call without going through
the Dialer user interface for the user to confirm the call being
placed.
CALL_PRIVILEGED
Allows an application to call any phone number, including
emergency numbers, without going through the Dialer user
interface for the user to confirm the call being placed.
CAMERA
Required to be able to access the camera device.
CHANGE_COMPONENT_ENABLED_STATE
Allows an application to change whether an application
component (other than its own) is enabled or not.
CHANGE_CONFIGURATION
Allows an application to modify the current configuration, such as
locale.
CHANGE_NETWORK_STATE
Allows applications to change network connectivity state
CHANGE_WIFI_MULTICAST_STATE
Allows applications to enter Wi-Fi Multicast mode
CHANGE_WIFI_STATE
Allows applications to change Wi-Fi connectivity state
CLEAR_APP_CACHE
Allows an application to clear the caches of all installed
applications on the device.
CLEAR_APP_USER_DATA
Allows an application to clear user data
CONTROL_LOCATION_UPDATES
Allows enabling/disabling location update notifications from the
radio.
DELETE_CACHE_FILES
Allows an application to delete cache files.
DELETE_PACKAGES
Allows an application to delete packages.
DEVICE_POWER
Allows low-level access to power management

DIAGNOSTIC
Allows applications to RW to diagnostic resources.
DISABLE_KEYGUARD
Allows applications to disable the keyguard
DUMP
Allows an application to retrieve state dump information from
system services.
EXPAND_STATUS_BAR
Allows an application to expand or collapse the status bar.
FACTORY_TEST
Run as a manufacturer test application, running as the root user.
FLASHLIGHT
Allows access to the flashlight
FORCE_BACK
Allows an application to force a BACK operation on whatever is
the top activity.
GET_ACCOUNTS
Allows access to the list of accounts in the Accounts Service
GET_PACKAGE_SIZE
Allows an application to find out the space used by any package.
GET_TASKS
Allows an application to get information about the currently or
recently running tasks: a thumbnail representation of the tasks,
what activities are running in it, etc.
GLOBAL_SEARCH
This permission can be used on content providers to allow the
global search system to access their data.
HARDWARE_TEST
Allows access to hardware peripherals.
INJECT_EVENTS
Allows an application to inject user events (keys, touch, trackball)
into the event stream and deliver them to ANY window.
INSTALL_LOCATION_PROVIDER
Allows an application to install a location provider into the Location
Manager
INSTALL_PACKAGES
Allows an application to install packages.
INTERNAL_SYSTEM_WINDOW
Allows an application to open windows that are for use by parts of
the system user interface.

62

permissions 2/2


INTERNET
Allows applications to open network sockets.
MANAGE_ACCOUNTS
Allows an application to manage the list of accounts in the
AccountManager
MANAGE_APP_TOKENS
Allows an application to manage (create, destroy, Z-order)
application tokens in the window manager.
MODIFY_AUDIO_SETTINGS
Allows an application to modify global audio settings
MODIFY_PHONE_STATE
Allows modification of the telephony state - power on, mmi, etc.
MOUNT_FORMAT_FILESYSTEMS
Allows formatting file systems for removable storage.
MOUNT_UNMOUNT_FILESYSTEMS
Allows mounting and unmounting file systems for removable
storage.
PERSISTENT_ACTIVITY
Allow an application to make its activities persistent.
PROCESS_OUTGOING_CALLS
Allows an application to monitor, modify, or abort outgoing calls.
READ_CALENDAR
Allows an application to read the user's calendar data.
READ_CONTACTS
Allows an application to read the user's contacts data.
READ_FRAME_BUFFER
Allows an application to take screen shots and more generally get
access to the frame buffer data
READ_HISTORY_BOOKMARKS
Allows an application to read (but not write) the user's browsing
history and bookmarks.
READ_INPUT_STATE
Allows an application to retrieve the current state of keys and
switches.
READ_LOGS
Allows an application to read the low-level system log files.
READ_OWNER_DATA
Allows an application to read the owner's data.
READ_PHONE_STATE
Allows read only access to phone state.
READ_SMS
Allows an application to read SMS messages.

READ_SYNC_STATS
Allows applications to read the sync stats
REBOOT
Required to be able to reboot the device.
RECEIVE_BOOT_COMPLETED
Allows an application to receive the ACTION_BOOT_COMPLETED that is
broadcast after the system finishes booting.
RECEIVE_MMS
Allows an application to monitor incoming MMS messages, to record or
perform processing on them.
RECEIVE_SMS
Allows an application to monitor incoming SMS messages, to record or
perform processing on them.
RECEIVE_WAP_PUSH
Allows an application to monitor incoming WAP push messages.
RECORD_AUDIO
Allows an application to record audio
REORDER_TASKS
Allows an application to change the Z-order of tasks
RESTART_PACKAGES
Allows an application to restart other applications.
SEND_SMS
Allows an application to send SMS messages.
SET_ACTIVITY_WATCHER
Allows an application to watch and control how activities are started globally
in the system.
SET_ALWAYS_FINISH
Allows an application to control whether activities are immediately finished
when put in the background.
SET_ANIMATION_SCALE
Modify the global animation scaling factor.
SET_DEBUG_APP
Configure an application for debugging.
SET_ORIENTATION
Allows low-level access to setting the orientation (actually rotation) of the
screen.
SET_PREFERRED_APPLICATIONS
This constant is deprecated. No longer useful, see
addPackageToPreferred(String) for details.
SET_PROCESS_LIMIT
Allows an application to set the maximum number of (not needed)
application processes that can be running.

SET_PROCESS_LIMIT
Allows an application to set the maximum number of (not needed) application
processes that can be running.
SET_TIME_ZONE
Allows applications to set the system time zone
SET_WALLPAPER
Allows applications to set the wallpaper
STATUS_BAR
Allows an application to open, close, or disable the status bar and its icons.
SUBSCRIBED_FEEDS_READ
Allows an application to allow access the subscribed feeds ContentProvider.
UPDATE_DEVICE_STATS
Allows an application to update device statistics.
USE_CREDENTIALS
Allows an application to request authtokens from the AccountManager
VIBRATE
Allows access to the vibrator
WAKE_LOCK
Allows using PowerManager WakeLocks to keep processor from sleeping or
screen from dimming
WRITE_APN_SETTINGS
Allows applications to write the apn settings
WRITE_CALENDAR
Allows an application to write (but not read) the user's calendar data.
WRITE_CONTACTS
Allows an application to write (but not read) the user's contacts data.
WRITE_EXTERNAL_STORAGE
Allows an application to write to external storage
WRITE_GSERVICES
Allows an application to modify the Google service map.
WRITE_HISTORY_BOOKMARKS
Allows an application to write (but not read) the user's browsing history and
bookmarks.
WRITE_OWNER_DATA
Allows an application to write (but not read) the owner's data.
WRITE_SECURE_SETTINGS
Allows an application to read or write the secure system settings.
WRITE_SETTINGS
Allows an application to read or write the system settings.
WRITE_SMS
Allows an application to write SMS messages.
WRITE_SYNC_SETTINGS
Allows applications to write the sync settings


63

Chapter 20: Debugging
suffer function:

public void suffer() {
for (int i=0; i<1000; i++) {
for (int j=0; j<1000; j++) {
int k = i*j;
}
}
}

64

Traceview result:

Chapter 20: Debugging

65

Chapter 21: Publish an application
1. Test
2. Setup an Icon
3. Add a license
4. Clean-up your code
5. Version your application
6. Create a certiﬁcate
7. Export for release
8. Sign
9. Retest
10. Publish
66

Chapter 21: Publish an application
2. Setup an Icon:
Check the Icon Design Guidelines at http://developer.android.com/guide/practices/ui_guidelines/icon_design.html
6. Create a certiﬁcate
keytool -genkey -v -keystore com.voxisland -alias jaykey -keyalg RSA -validity 10000
8. Sign the application
jarsigner -verbose -keystore com.voxisland simplelist.apk jaykey
Optimize
zipalign -v 4 simplelist.apk simplelist2.apk

67

Curso de android vox island

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