サービスと通知のコード例

private NotificationManager mNM;
	int mCount;
	
	@Override
	public void onCreate() {
		mCount=0;
		
		mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
		showNotification();
	
   }

	private void showNotification() {
		
		PendingIntent contentIntent = PendingIntent.getActivity(
    			this, 0, 
    			new Intent(this, GBServiceActivity.class), 0);
		
		Notification notif= new Notification.Builder(this)
		.setContentTitle(getString(R.string.app_name))
		.setContentText(getText(R.string.service_started))
		.setSmallIcon(R.drawable.bickie_square_48)
		.setContentIntent(contentIntent)
		.build();
		
		mNM.notify(1, notif);

	}

@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		
		//ログに記録するなどの処理
		
		return START_STICKY;
	}

@Override
public void onDestroy() {
	//通知をキャンセル
	mNM.cancel(1);
	
	Toast.makeText(this, R.string.service_stopped, Toast.LENGTH_SHORT).show();
}

Handler mCountHandler = new Handler(){
		
	@Override
	 public void handleMessage(Message msg){
		super.handleMessage(msg);

		mCount=mCount+msg.arg1;
		
		
		Message replyMessage = Message.obtain(null,0, mCount, 0);
	    try{
	    	(msg.replyTo).send(replyMessage);
	    }catch(RemoteException e){}
		
	}
 };
 
 final Messenger mServiceMessenger = new Messenger(mCountHandler);	
 

@Override
public IBinder onBind(Intent intent) {
	return mServiceMessenger.getBinder();
}

private boolean mIsBound;
private boolean mIsRunning;
private TextView mTextCount;
private EditText mEditCount;
private Messenger mServiceMessenger;

@Override
protected void onCreate(Bundle savedInstanceState) {
	
	super.onCreate(savedInstanceState);
	setContentView(R.layout.gbmessenger);
	mIsRunning=false;
	
	mTextCount=(TextView)findViewById(R.id.textCount);
	mEditCount=(EditText)findViewById(R.id.inputChange);
	
}
	

public void onBtStartClick(View v) {
	startService(new Intent(this, GBService.class));
	mIsRunning=true;
}

public void onBtStopClick(View v) {
	stopService(new Intent(this, GBService.class));
	if(mIsRunning==true){
		mIsRunning=false;
	}
}

	private ServiceConnection mConnection = new ServiceConnection(){
		public void onServiceConnected(ComponentName className, IBinder service){
			
			
			mServiceMessenger = new Messenger(service);
			
			Toast.makeText(GBServiceActivity.this, R.string.bind_service,
					Toast.LENGTH_SHORT).show();	
		}
		
		public void onServiceDisconnected(ComponentName className){
			Toast.makeText(GBServiceActivity.this, R.string.unbind_service, 
					Toast.LENGTH_SHORT).show();				
		}
	};
	

public void onBtBindClick(View v) {
	bindService(new Intent(this, GBService.class), mConnection, Context.BIND_AUTO_CREATE);
	mIsBound = true;
	if(mIsRunning==false){mIsRunning=true;}
}

public void onBtUnbindClick(View v) {
	if(mIsBound){
		unbindService(mConnection);
		mIsBound = false;
	}
}

Handler mClientHandler =new Handler(){
	
	@Override
	 public void handleMessage(Message msg){
		super.handleMessage(msg);
		
		mTextCount.setText(Integer.toString(msg.arg1));
		
	}
	
 };
 
 final Messenger mClientMessenger= new Messenger(mClientHandler);

public void onBtCountClick(View v){

	//アクティビティがサービスに接続していない状態でメッセージを送るとエラーになる！
	if(mIsBound==false){
		Toast.makeText(this, R.string.please_bind, Toast.LENGTH_SHORT).show();
			//「サービスに接続してください」とメッセージを出す
			
		return; //処理を中断して強制終了を回避
	}

	int num = Integer.parseInt((mEditCount.getText()).toString());
	
	Message msg = Message.obtain(null,0,num, 0);
	msg.replyTo = mClientMessenger;
			
	try{
		
	    mServiceMessenger.send(msg);
	
	}catch(RemoteException e){}
				
}