Contoh bahan latihan programan mobile java

MEMULAI PEMROGRAMAN MOBILE
Contoh 1:
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class Midlet1 extends MIDlet {
private Display display;
public Midlet1(){
display = Display.getDisplay(this);
}
public void startApp() {
TextBox tb = new TextBox ("Hello MIDlet","Hello J2ME...!", 250,0);
display.setCurrent(tb);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
}
Contoh 2:
public class HelloMidlet extends MIDlet implements CommandListener {
Display display;
Command exitCommand = new Command("Exit", Command.EXIT, 1);
Alert helloAlert;
public HelloMidlet(){
helloAlert = new Alert(
"Judul MIDlet", "Selamat datang dipemrograman MIDlet!",
null, AlertType.INFO
);
helloAlert.setTimeout(Alert.FOREVER);
helloAlert.addCommand(exitCommand);
helloAlert.setCommandListener(this);
}
if (display == null){
}
display.setCurrent(helloAlert);
}
public void pauseApp() { }
public void destroyApp(boolean unconditional) { }
public void commandAction(Command c, Displayable d){
if (c == exitCommand){
destroyApp(true);
notifyDestroyed(); // Exit
}
}
}

HIGH LEVEL USER INTERFACE
Contoh 1:
package ora.ch4;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;
public class TextBoxMIDlet extends MIDlet {
// Maximum size of the text in the TextBox
private static final int MAX_TEXT_SIZE = 64;
// The TextBox
protected TextBox textBox;
// The MIDlet's Display object
protected Display display;
// Flag indicating first call of startApp
protected boolean started;
protected void startApp( ) {
if (!started) {
// First time through - initialize
// Get the text to be displayed
String str = null;
try {
InputStream is = getClass( ).getResourceAsStream(
"resources/text.txt");
InputStreamReader r = new InputStreamReader(is);
char[] buffer = new char[32];
StringBuffer sb = new StringBuffer( );
int count;
while ((count = r.read(buffer, 0, buffer.length)) > -1) {
sb.append(buffer, 0, count);
}
str = sb.toString( );
} catch (IOException ex) {
str = "Failed to load text";
}
// Create the TextBox
textBox = new TextBox("TextBox Example", str,
MAX_TEXT_SIZE, TextField.ANY);
// Create a ticker and install it
Ticker ticker = new Ticker("This is a ticker...");
textBox.setTicker(ticker);
// Install the TextBox as the current screen
display.setCurrent(textBox);
started = true;

}
}
protected void pauseApp( ) {
}
protected void destroyApp(boolean unconditional) {
}
}
Contoh 2:
import java.util.Timer;
import java.util.TimerTask;
public class SimpleStopWatch extends MIDlet implements CommandListener
{
Display dsp;
Form form;
TextField txt;
Command start;
Command pause;
Command exit;
Timer timer;
StartTime st;
public void startApp()
{
dsp = Display.getDisplay(this);
form = new Form("Simple StopWatch");
txt = new TextField("Waktu","",45, TextField.ANY);
start = new Command("Start", Command.OK,0);
pause = new Command("Pause", Command.OK,0);
exit = new Command("Exit", Command.EXIT,1);
form.append(txt);
form.addCommand(start);
form.addCommand(exit);
form.setCommandListener((CommandListener) this);
dsp.setCurrent(form);
}
public void pauseApp(){
}
}
public void commandAction(Command com, Displayable dis)
{
if(com == start)
{
form.removeCommand(start);
form.addCommand(pause);
timer = new Timer();
st = new StartTime();
timer.schedule(st,0,100);

}
else if(com == pause)
{
form.removeCommand(pause);
form.addCommand(start);
timer.cancel();
}
else if(com == exit)
{
destroyApp(false);
notifyDestroyed();
}
}
public class StartTime extends TimerTask
{
int a;
int dtk, detik, menit, jam;
public final void run()
{
++dtk;
if(dtk >= 9)
{
detik = detik + 1;
dtk = 0;
}
else if(detik > 59)
{
menit = menit + 1;
detik = 0;
}
else if(menit > 59)
{
jam = jam + 1;
menit = 0;
}
txt.setString(jam + ":" + menit + ":" + detik + ":" +
dtk);
}
}
}

LOW LEVEL USER INTERFACE
Contoh 1:
public class MIDPCanvas extends Canvas implements CommandListener {
public MIDPCanvas() {
}
public void paint(Graphics g) {
g.drawString("Sample Text", 0, 0, Graphics.TOP | Graphics.LEFT);
// desain form
int w = getWidth();
int h = getHeight();
g.setColor(0,0,0);
g.fillRect(0,0,w,h);
// shape line
g.setColor(0,174,0);
int z = 10;
g.drawLine(z, z, z=30, z);
//shape ractanggle
z += 15;
g.drawRect(z,z,100,50);
g.fillRect(20,132,88,44);
//shape mound ractanggle
g.setColor(255,255,255);
z +=75;
g.drawRoundRect(z,z,35,35,73,73);
//shape triangle
z +=15;
g.fillTriangle(z,z+30,z+60,z+30,z+60,z+100);
}
protected void keyPressed(int keyCode) {
}
protected void keyReleased(int keyCode) {
}
protected void keyRepeated(int keyCode) {
}
protected void pointerDragged(int x, int y) {
}
protected void pointerPressed(int x, int y) {
}
protected void pointerReleased(int x, int y) {
}
public void commandAction(Command command, Displayable displayable) {
}

}
Contoh 2:
package movingcircle;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
public class Midlet extends MIDlet implements CommandListener {
public MovingCircleCanvas canvas;
public Alert alert;
public static boolean isPaused = false;
private Command exitCmd = new Command("Exit", Command.EXIT, 99);
private Command pauseCmd = new Command("Pause", Command.SCREEN, 1);
private Command resumeCmd = new Command("Resume", Command.SCREEN, 0);
private int tempX, tempY;
public Midlet() {
// TODO Auto-generated constructor stub
canvas = new MovingCircleCanvas(this);
canvas.addCommand(exitCmd);
canvas.addCommand(pauseCmd);
canvas.setCommandListener(this);
}
protected void destroyApp(boolean arg0) throws
MIDletStateChangeException {
// TODO Auto-generated method stub
}
protected void pauseApp() {
}
protected void startApp() throws MIDletStateChangeException {
Display display = Display.getDisplay(this);
display.setCurrent(canvas);
canvas.mulai();
}
public void commandAction(Command c, Displayable s) {
if (c == exitCmd) {
try {
destroyApp(true);
notifyDestroyed();
} catch (MIDletStateChangeException e) {
e.printStackTrace();
}
} else if (c == pauseCmd) {
isPaused = true;
canvas.addCommand(resumeCmd);
canvas.removeCommand(pauseCmd);
tempX = canvas.speedBallX;

tempY = canvas.speedBallY;
canvas.speedBallX = 0;
canvas.speedBallY = 0;
} else if (c == resumeCmd) {
isPaused = false;
canvas.addCommand(pauseCmd);
canvas.removeCommand(resumeCmd);
canvas.speedBallX = tempX;
canvas.speedBallY = tempY;
// canvas.mulai();
}
}
}

PERSISTENCE
Contoh 1:
import javax.microedition.lcdui.Form;
import javax.microedition.rms.RecordFilter;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
public class RMSKonsep extends MIDlet
{
Input input;
public RMSKonsep()
{
input = new Input();
}
public void startApp()
{
Display.getDisplay(this).setCurrent(input);
}
public void pauseApp(){}
public void destroyApp(boolean n){ notifyDestroyed(); }
}
class Input extends Form implements CommandListener,RecordFilter
{
public TextField tf;
public TextField tfCari;
public RecordStore rs;
public Input()
{
super(“Input “);
try{
rs = RecordStore.openRecordStore(“KonsepRMS1.db”,true);
}catch(Exception e){}
tf = new TextField(“Input Data “,”",10,1);
tfCari = new TextField(“Cari Data “,”",10,1);
append(tf);
append(tfCari);
addCommand(new Command(“Lihat”,Command.BACK,1));
addCommand(new Command(“Tambah”,Command.OK,1));
addCommand(new Command(“Cari”,Command.OK,2));
setCommandListener(this);
}

public void tambahData(String strinput)
{
byte tempInput[];
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
try{
dos.writeUTF(strinput);
tempInput = bos.toByteArray();
try{
rs.addRecord(tempInput,0,tempInput.length);
System.out.println(strinput+” DIINPUT”);
}
public void tampilkanData()
{
byte tempTampil[];
RecordEnumeration re;
try{
re = rs.enumerateRecords(null, null, false);
while(re.hasNextElement())
{
int i = re.nextRecordId();
tempTampil = rs.getRecord(i);
ByteArrayInputStream bis = new
ByteArrayInputStream(tempTampil);
DataInputStream dis = new DataInputStream(bis);
String strinput = dis.readUTF();
System.out.println(i+”. “+strinput+”");
}
}
public void cariData()
{
RecordEnumeration reCari;
try{
rs = RecordStore.openRecordStore(“KonsepRMS1.db”,true);
reCari = rs.enumerateRecords(this, null, false);
}
public boolean matches(byte[] candidate)
{
boolean isMatches = false;
try{
ByteArrayInputStream bisC = new
ByteArrayInputStream(candidate);
DataInputStream dis = new DataInputStream(bisC);
String buff = dis.readUTF();
if(buff.equals(tfCari.getString()))
{
isMatches = true;
System.out.println(buff+” BERHASIL DITEMUKAN”);

}else{
isMatches = false;
}
return(isMatches);
}
public void commandAction(Command c, Displayable d)
{
if(c.getLabel()==”Tambah”)
{
if(tf.getString().length()!=0)
{
System.out.println(“Input Data”);
tambahData(tf.getString());
System.out.println(“”);
}else
{
System.out.println(“Isi Dulu Datanya”);
}
//System.out.println(tf.getString());
}
if(c.getLabel()==”Lihat”)
{
System.out.println(“Data yang telah diinput”);
tampilkanData();
System.out.println(“”);
}
if(c.getLabel()==”Cari”)
{
cariData();
}
}
}
Contoh 2:
package ListMenu;
import javax.microedition.rms.*;
import java.io.*;
public class ListMenu extends MIDlet implements CommandListener{
private List list;
private Command cmdKeluar;
private Command cmdKembali, cmdHasil, cmdbalik, cmdSimpan;
private TextField soal1, soal2, soal3, soal4, soal5, id;
private Form form;
int nilai1, nilai2, nilai3, nilai4, nilai5;
int Nakhir;
private RecordStore rs;
private RecordEnumeration re;
private Alert alert;
public ListMenu() {

form = new Form("Menu Utama");
cmdKeluar = new Command("Keluar", Command.EXIT, 0);
cmdKembali = new Command("Kembali", Command.BACK, 1);
cmdbalik = new Command("Kembali", Command.BACK, 1);
cmdHasil = new Command("Hasil", Command.OK, 2);
cmdSimpan = new Command("Simpan", Command.OK, 2);
alert = new Alert(null);
alert.setTimeout(Alert.FOREVER);
list = new List(null, Choice.IMPLICIT);
rs = null;
// membuat atau membuka record store
try
{
rs = RecordStore.openRecordStore("db_KodeBar", true);
}
catch (RecordStoreException RSE) //check kalau error = exception
{
alert.setString("Record store tidak dapat dibuka. " +"Aplikasi
akan dihetikan");
alert.setType(AlertType.ERROR);
display.setCurrent(alert, null);
System.exit(1);
}
}
display.setCurrent(form);
menuList();
}
}
notifyDestroyed();
}
public void menuList(){
list = new List("Menu Utama", List.IMPLICIT);
list.append("Latihan Berhitung", null);
list.append("Skor", null);
list.append("Keluar", null);
list.setCommandListener(this);
display.setCurrent(list);
}
public void UJIAN(){
form = new Form("Latihan Berhitung");
soal1 = new TextField("1. 2+3 = ?", "", 100, TextField.DECIMAL);
soal2 = new TextField("2. 8/2 = ?", "", 100, TextField.DECIMAL);
soal3 = new TextField("3. 3*4 = ?", "", 100, TextField.DECIMAL);
soal4 = new TextField("4. 7-3 = ?", "", 100, TextField.DECIMAL);
soal5 = new TextField("5. (7-3)*2 = ?", "", 100, TextField.DECIMAL);
form.append(soal1);
form.append(soal2);
form.append(soal3);
form.append(soal4);
form.append(soal5);
form.setCommandListener(this);
form.addCommand(cmdKembali);

form.addCommand(cmdHasil);
}
public void nama(){
form = new Form("SIMPAN HASIL");
id = new TextField("Masukkan nama anda : ","", 100, TextField.ANY);
form.append(id);
form.addCommand(cmdSimpan);
form.addCommand(cmdbalik);
}
public void commandAction(Command c, Displayable d) {
if (c == cmdKeluar){
destroyApp(true);
}
if(c.getLabel()=="Simpan"){
alert.setType(AlertType.INFO);
if (!id.equals(null)) //cek jika var ada isi nya
{
tambahRecord(id.getString());
alert.setString("Data lengkap !, Data sudah disimpan di RMS,
untuk melihat gunakan pilihan menu'nilai tertinggi' pada menu utama");
display.setCurrent(alert);
display.setCurrent(alert, list);
}
else //jika data kosong
{
alert.setString("Data Kurang !, isikan nama anda terlebih
dahulu.");
display.setCurrent(alert, form);
}
}
if(c.getLabel()=="Nilai Tertinggi"){
lihatRecord();
}
else if (c == cmdHasil){
nama();
}
else if (c == cmdbalik){
UJIAN();
}else if (c == cmdKembali){
menuList();
}else{
List menu = (List) display.getCurrent();
switch (menu.getSelectedIndex()){
case 0:
UJIAN();
break;
case 1:
lihatRecord();
break;
case 2:
destroyApp(true);
}
}
}
public void tambahRecord(String id)

{
int a = Integer.parseInt(soal1.getString());
int b = Integer.parseInt(soal2.getString());
int c = Integer.parseInt(soal3.getString());
int d = Integer.parseInt(soal4.getString());
int e = Integer.parseInt(soal5.getString());
if(a == 5){
a=2;
}
else if(a != 5){
a=0;
}
if(b==4){
b=2;
}
else if(b != 4){
b=0;
}
if(c==12){
c=2;
}
else if(c != 12){
c=0;
}
if(d==5){
d=2;
}
else if(d !=2 ){
d=0;
}
if(e==10){
e=2;
}
else if(e != 10){
e=0;
}
Nakhir = a + b + c + d + e;
byte[] temp = null;
try
{
//kosntruktor baos dan dos
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
//cari fungsi ini ByteArrayOutputStream dan DataOutputStream di
internet
dos.writeUTF(id);// tulis var pada dos
dos.writeInt(Nakhir);
temp = baos.toByteArray();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
try
{
rs.addRecord(temp, 0, temp.length); //masukan data pada RecordStore
} catch (RecordStoreNotOpenException rsnoe) {
rsnoe.printStackTrace();
} catch (RecordStoreException rse) {
rse.printStackTrace();

}
}
public void lihatRecord() {
byte[] temp = null;
list.setTitle("Nilai Tertinggi");
list.deleteAll();
try
{
re = rs.enumerateRecords(null, null, false); //enumerasi record
while (re.hasNextElement()) //jk elemen rs lbh dr satu
{
int i = re.nextRecordId();
temp = rs.getRecord(i);
ByteArrayInputStream bais = new ByteArrayInputStream(temp);
DataInputStream dis = new DataInputStream(bais);
try
{
String id = dis.readUTF();
//Integer Nakhir = dis.readUTF();
list.append(id + " = "+ Nakhir +" n",null);// tampilkan
}
catch (IOException ioe) {ioe.printStackTrace();}
}
list.addCommand(cmdKembali);
list.setCommandListener(this);
display.setCurrent(list);
}
catch (InvalidRecordIDException invID) {invID.printStackTrace();}
catch (RecordStoreNotOpenException rsnoe) {rsnoe.printStackTrace();}
catch (RecordStoreException rse) {rse.printStackTrace();}
}
}

WEB SERVICES
Contoh 1:
package org.secangkirkopipanas.xml;
import javax.microedition.io.*;
import java.io.*;
import org.kxml2.io.*;
import org.xmlpull.v1.*;
public class XmlParsing extends MIDlet implements CommandListener {
private Form main;
private StringItem siNim[];
private StringItem siNama[];
private StringItem siAlamat[];
private StringItem siJudul[];
private Command cmdExit;
private KXmlParser parser;
private int jumlah = 0;
public XmlParsing() {
main = new Form("Data Skripsi Mahasiswa");
siNim = new StringItem[10];
siNama = new StringItem[10];
siAlamat = new StringItem[10];
siJudul = new StringItem[10];
cmdExit = new Command("Exit", Command.EXIT, 0);
}
getXMLDocument();
main.addCommand(cmdExit);
main.setCommandListener(this);
display.setCurrent(main);
}
}
}
if (c == cmdExit) {
destroyApp(true);
}
}
public void getXMLDocument() {
HttpConnection conn;
DataInputStream dis;
DataOutputStream dos;
try {
conn = (HttpConnection) Connector.open(
"http://localhost:8081/xml/skripsi.xml");
conn.setRequestMethod(HttpConnection.GET);
conn.setRequestProperty("Content-Type", "text/xml");

dos = new DataOutputStream(conn.openDataOutputStream());
/**
* Proses untuk membuka koneksi dengan server untuk
* mengambil response dari server
*/
dis = new DataInputStream(conn.openDataInputStream());
if (conn.getResponseCode() == HttpConnection.HTTP_OK) {
/** Mengambil data XML dari server */
doParse(dis);
for (int i = 0; i < jumlah; i++) {
main.append(siNim[i]);
main.append(siNama[i]);
main.append(siAlamat[i]);
main.append(siJudul[i]);
main.append("---");
}
} else {
/** Koneksi Error */
main.append("Koneksi Error");
}
} catch (Exception e) {
/** Error */
main.append("Error: " + e);
}
}
public void doParse(InputStream isxml) {
parser = new KXmlParser();
try {
parser.setInput(new InputStreamReader(isxml));
parser.next();
parser.require(XmlPullParser.START_TAG, null, "teknik-
informatika");
while (parser.nextTag() != XmlPullParser.END_TAG) {
parser.require(XmlPullParser.START_TAG, null,
"mahasiswa");
siNim[jumlah] = new StringItem("NIM: ",
parser.getAttributeValue(0));
while (parser.nextTag() != XmlPullParser.END_TAG)
{
parser.require(XmlPullParser.START_TAG,
null, "nama");
siNama[jumlah] = new StringItem("Nama: ",
parser.nextText());
parser.require(XmlPullParser.END_TAG,
null, "nama");
parser.nextTag();
null, "alamat");
siAlamat[jumlah] = new StringItem("Alamat:
", parser.nextText());
null, "alamat");
parser.nextTag();
null, "judul");

siJudul[jumlah] = new StringItem("Judul:
", parser.nextText());
null, "judul");
}
parser.require(XmlPullParser.END_TAG, null,
"mahasiswa");
jumlah++;
}
parser.require(XmlPullParser.END_TAG, null, "teknik-
informatika");
} catch (Exception e) { e.printStackTrace(); }
}
}
Contoh 2:
package Tutorial.Parser;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.kxml2.io.KXmlParser;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
public class KesesuaianParse {
String url = "/Tutorial/XMLfile/Kesesuaian.xml";
String idkesesuaian;
String namakesesuaian;
public KesesuaianParse() {
}
public void parseNow(){
InputStream is = getClass().getResourceAsStream(url);
InputStreamReader reader = new InputStreamReader(is);
KXmlParser parser = new KXmlParser();
try {
parser.setInput(reader);
} catch (XmlPullParserException ex) {
ex.printStackTrace();
}
try {
parser.nextTag();
while(parser.getEventType() != XmlPullParser.END_DOCUMENT){
if(parser.getEventType() == XmlPullParser.START_TAG &&
parser.getName().equals("id_kesesuaian")){
parser.next();
idkesesuaian = parser.getText();
}
if(parser.getEventType() == XmlPullParser.START_TAG &&
parser.getName().equals("nama_kesesuaian")){
parser.next();
namakesesuaian = parser.getText();
}
parser.next();
}

} catch (XmlPullParserException ex) {
}
}
public String getIdkesesuaian() {
return idkesesuaian;
}
public String getNamakesesuaian() {
return namakesesuaian;
}
}
package Tutorial;
import Tutorial.Parser.KesesuaianParse;
import Tutorial.TextBox.ContohTextBox;
public class Midlet extends MIDlet {
private ContohTextBox textBox;
public Midlet() {
KesesuaianParse parse = new KesesuaianParse();
parse.parseNow();
textBox = new ContohTextBox(this, display, "textbox contoh",
parse.getIdkesesuaian()+"nn"+parse.getNamakesesuaian(), 159,
TextField.ANY);
display.setCurrent(textBox);
}
}
}
}
public void exit(){
destroyApp(false);
notifyDestroyed();
}
}

OPTIONAL PACKAGES
Contoh 1:
FormCamera.java
import java.io.DataOutputStream;
import java.util.Date;
import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Item;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import javax.microedition.media.control.VideoControl;
public class FormCamera extends Form {
private VideoControl control;
private Player player;
private Item videoItem;
public FormCamera() {
super("Camera ON");
initial();
}
public void initial() {
try {
player = Manager.createPlayer("capture://image");
player.realize();
control = (VideoControl) player.getControl("VideoControl");
if (control != null) {
videoItem = (Item)
control.initDisplayMode(control.USE_GUI_PRIMITIVE, null);
this.deleteAll();
this.append(videoItem);
control.setDisplayFullScreen(true);
control.setVisible(true);
}
player.start();
} catch (MediaException ex) {
}
}
public void shootNow() {
new SnapshotThread().start();
}
class SnapshotThread extends Thread {
public void run() {
try {
byte[] snap = control.getSnapshot("encoding=jpeg");
Date date = new Date(System.currentTimeMillis());

FileConnection fileconnection = (FileConnection)
Connector.open("file:///E:/Images/" + date.getTime() + ".jpg");
if (fileconnection.exists()) {
fileconnection.delete();
}
fileconnection.create();
DataOutputStream dataoutputstream =
fileconnection.openDataOutputStream();
dataoutputstream.write(snap, 0, snap.length);
dataoutputstream.flush();
dataoutputstream.close();
fileconnection.close();
player.close();
player = null;
control = null;
initial();
} catch (MediaException ex) {
} catch (NullPointerException ex) {
}
}
}
}
MidletCamera.java
public class MidletCamera extends MIDlet implements CommandListener{
private Command cmdShoot;
private Command cmdExit;
private Command cmdBack;
private FormCamera form;
public Display display;
public MidletCamera(){
cmdShoot = new Command("Shoot!",Command.OK, 1);
cmdExit = new Command("Exit", Command.EXIT, 2);
cmdBack = new Command("Back", Command.BACK, 2);
form = new FormCamera();
}
form.addCommand(cmdShoot);
form.addCommand(cmdExit);
}

}
}
if(c == cmdShoot){
form.shootNow();
}else if(c == cmdExit){
destroyApp(true);
notifyDestroyed();
}else if(c == cmdBack){
}
}
}
Contoh 2:
import javax.microedition.media.*;
import javax.microedition.media.control.*;
import javax.microedition.media.control.VideoControl;
public class VideoControlExample extends MIDlet implements CommandListener{
private Form form;
private Command exit, back, capture, camera;
private Player player;
private VideoControl videoControl;
private Video video;
public VideoControlExample() {
form = new Form("Capture Video");
exit = new Command("Exit", Command.EXIT, 0);
camera = new Command("Camera", Command.SCREEN, 1);
back = new Command("Back", Command.BACK, 2);
capture = new Command("Capture", Command.SCREEN, 3);
form.addCommand(camera);
}
}
public void pauseApp() {}
public void destroyApp(boolean unconditional){
notifyDestroyed();
}
public void commandAction(Command c, Displayable s){
String label = c.getLabel();
if (label.equals("Exit")){
destroyApp(true);
} else if (label.equals("Camera")) {
showCamera();

} else if (label.equals("Back"))
else if (label.equals("Capture")) {
video = new Video(this);
video.start();
}
}
public void showCamera(){
try{
player = Manager.createPlayer("capture://video");
player.realize();
videoControl = (VideoControl)player.getControl("VideoControl");
Canvas canvas = new VideoCanvas(this, videoControl);
canvas.addCommand(back);
canvas.addCommand(capture);
canvas.setCommandListener(this);
display.setCurrent(canvas);
player.start();
} catch (IOException ioe) {} catch (MediaException me) {}
}
class Video extends Thread {
VideoControlExample midlet;
public Video(VideoControlExample midlet) {
this.midlet = midlet;
}
public void run() {
captureVideo();
}
public void captureVideo() {
try {
byte[] photo = videoControl.getSnapshot(null);
Image image = Image.createImage(photo, 0, photo.length);
form.append(image);
player.close();
player = null;
videoControl = null;
} catch (MediaException me) { }
}
};
}
class VideoCanvas extends Canvas {
private VideoControlExample midlet;
public VideoCanvas(VideoControlExample midlet, VideoControl videoControl)
{
int width = getWidth();
int height = getHeight();
this.midlet = midlet;
videoControl.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, this);
try {
videoControl.setDisplayLocation(2, 2);
videoControl.setDisplaySize(width - 4, height - 4);
} catch (MediaException me) {}
videoControl.setVisible(true);
}

public void paint(Graphics g) {
int width = getWidth();
int height = getHeight();
g.setColor(255, 0, 0);
g.drawRect(0, 0, width - 1, height - 1);
g.drawRect(1, 1, width - 3, height - 3);
}
}

TOPIK TAMBAHAN
Contoh 1:
import java.util.*;
public class TimerMIDlet extends MIDlet implements CommandListener{
private Form form;
private Command exit, stop;
private Timer timer;
private TestTimerTask task;
private int count = 0;
public TimerMIDlet(){
form = new Form("Timer Example");
exit = new Command("Exit", Command.EXIT, 1);
stop= new Command("Stop", Command.STOP, 2);
form.append("Please wait for timer.. n");
form.addCommand(exit);
form.addCommand(stop);
}
public void startApp (){
timer = new Timer();
task = new TestTimerTask();
timer.schedule(task,5000);
}
public void pauseApp (){ }
public void destroyApp (boolean unconditional){
notifyDestroyed();
}
public void commandAction(Command c, Displayable d){
String label = c.getLabel();
if (label.equals("Stop")){
timer.cancel();
}else if (label.equals("Exit")) {
destroyApp(true);
}
}
private class TestTimerTask extends TimerTask{
public final void run(){
form.append("Timer Execute Count: " + ++count + "n");
}
}
}
Contoh 2:
import java.util.Vector;

import javax.microedition.io.ConnectionNotFoundException;
import javax.microedition.io.Connector;
import javax.microedition.io.PushRegistry;
import javax.wireless.messaging.MessageConnection;
import javax.wireless.messaging.MessageListener;
import javax.wireless.messaging.TextMessage;
public class PushMidlet extends MIDlet implements CommandListener,
MessageListener, Runnable {
Display display;
Form form;
/*MIDlet class name.*/
private String midletName = this.getClass().getName();
Command cmdExit = new Command("Exit", Command.EXIT, 1);
/*Command for registering alarm*/
Command cmdAlarm = new Command("Register Alarm", Command.ITEM, 0);
/*Command for registering SMS Port*/
Command cmdReg = new Command("Register SMS", Command.ITEM, 0);
/*Command for unregistering SMS Port*/
Command cmdUnreg = new Command("UNRegister SMS", Command.ITEM, 0);
Vector allConn = new Vector();
Thread thread;
String smsPort;
boolean firstTime;
public PushMidlet() {
smsPort = getAppProperty("SMS-Port");
firstTime = true;
form = new Form("Event Listener");
form.addCommand(cmdExit);
form.addCommand(cmdAlarm);
form.addCommand(cmdReg);
form.addCommand(cmdUnreg);
}
getListConnections();
}
}
}
/*Check for list of connections recieved*/
public void getListConnections() {
String regConnections[];
regConnections = PushRegistry.listConnections(true);
if (regConnections.length != 0) {
form.append("Launched using SMS Event to UN Register select
UNRegister SMS");
for (int i = 0; i < regConnections.length; i++) {

try {
MessageConnection msgconn = (MessageConnection)
Connector.open(regConnections[i]);
msgconn.setMessageListener(this);
allConn.addElement(msgconn);
} catch (SecurityException exSec) {
form.append("SecurityException=" + exSec);
} catch (IOException exIO) {
form.append("IOException==" + exIO);
}
}
} else {
if (firstTime) {
form.append("Manually launched");
form.append("Here you can select Register and Un Register
SMS also Register Alarm Dynamically");
firstTime = false;
}
regConnections = PushRegistry.listConnections(false);
}
}
/*Register the Alarm for certain period for auto launch*/
private void registerAlarm(final long duration) {
new Thread() {
public void run() {
long alarmTiming = System.currentTimeMillis() + duration;
try {
/*to register MIDlet for a time period*/
PushRegistry.registerAlarm(midletName, alarmTiming);
} catch (ClassNotFoundException ex) {
form.append("n ClassNotFoundException");
} catch (ConnectionNotFoundException ex) {
form.append("n ConnectionNotFoundException");
}
}
}.start();
}
public void commandAction(Command cmd, Displayable disp) {
if (cmd == cmdExit) {
exitMidlet();
} else if (cmd == cmdAlarm) {
registerAlarm(4000);
} else if (cmd == cmdReg) {
RegisterSMSConn();
} else if (cmd == cmdUnreg) {
UnRegisterSMSConn();
}
}
public void exitMidlet() {
closeConnections();
destroyApp(true);

notifyDestroyed();
}
/*Make dynamic connection registered for a specific sms port*/
public void RegisterSMSConn() {
thread = new Thread(this);
thread.start();
}
public void run() {
try {
/*To register Midlet for a port number*/
PushRegistry.registerConnection("sms://:" + smsPort, midletName,
"*");
closeConnections();
getListConnections();
} catch (ClassNotFoundException exe) {
}
}
/*To unregister the port dynamically*/
public void UnRegisterSMSConn() {
PushRegistry.unregisterConnection("sms://:" + smsPort);
}
public void closeConnections() {
if (allConn != null) {
while (allConn.isEmpty() == false) {
MessageConnection msgConn =
(MessageConnection) allConn.firstElement();
if (msgConn != null) {
try {
msgConn.setMessageListener(null);
msgConn.close();
} catch (Exception exp) {
}
}
allConn.removeElementAt(0);
}
}
}
/* Invokes when recieved message on specify port*/
public void notifyIncomingMessage(MessageConnection msgConn) {
TextMessage message = null;
try {
message = (TextMessage) msgConn.receive();
String sendAddr = message.getAddress();
form.setTitle(sendAddr);
String messageText = message.getPayloadText();
form.append(messageText);
form.append("Exception here" + ex);
}
}
}

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