APP_Service_ForegroundServiceController

[ForegroundServiceController.java]

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.foreground_service_controller);

        // Watch for button clicks.
        Button button = (Button)findViewById(R.id.start_foreground);
        button.setOnClickListener(mForegroundListener);
        button = (Button)findViewById(R.id.start_background);
        button.setOnClickListener(mBackgroundListener);
        button = (Button)findViewById(R.id.stop);
        button.setOnClickListener(mStopListener);
    }

    private OnClickListener mForegroundListener = new OnClickListener() {
        public void onClick(View v) {
            Intent intent = new Intent(ForegroundService.ACTION_FOREGROUND);
            intent.setClass(ForegroundServiceController.this, ForegroundService.class);
            startService(intent);
        }
    };

    private OnClickListener mBackgroundListener = new OnClickListener() {
        public void onClick(View v) {
            Intent intent = new Intent(ForegroundService.ACTION_BACKGROUND);
            intent.setClass(ForegroundServiceController.this, ForegroundService.class);
            startService(intent);
        }
    };

    private OnClickListener mStopListener = new OnClickListener() {
        public void onClick(View v) {
            stopService(new Intent(ForegroundServiceController.this,
                    ForegroundService.class));
        }
    };
}

[ForegroundService.java]

    static final String ACTION_FOREGROUND = "com.example.android.apis.FOREGROUND";
    static final String ACTION_BACKGROUND = "com.example.android.apis.BACKGROUND";
   
    private static final Class[] mStartForegroundSignature = new Class[] {
        int.class, Notification.class};
    private static final Class[] mStopForegroundSignature = new Class[] {
        boolean.class};
   
    private NotificationManager mNM;
    private Method mStartForeground;
    private Method mStopForeground;
    private Object[] mStartForegroundArgs = new Object[2];
    private Object[] mStopForegroundArgs = new Object[1];
   
    @Override
    public void onCreate() {
        mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
        try {
            mStartForeground = getClass().getMethod("startForeground",
                    mStartForegroundSignature);
            mStopForeground = getClass().getMethod("stopForeground",
                    mStopForegroundSignature);
        } catch (NoSuchMethodException e) {
            // Running on an older platform.
            mStartForeground = mStopForeground = null;
        }
    }

    // This is the old onStart method that will be called on the pre-2.0
    // platform.  On 2.0 or later we override onStartCommand() so this
    // method will not be called.
    @Override
    public void onStart(Intent intent, int startId) {
        handleCommand(intent);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        handleCommand(intent);
        // We want this service to continue running until it is explicitly
        // stopped, so return sticky.
        return START_STICKY;
    }

    void handleCommand(Intent intent) {
        if (ACTION_FOREGROUND.equals(intent.getAction())) {
   // In this sample, we'll use the same text for the ticker and the expanded notification
            CharSequence text = getText(R.string.foreground_service_started);

            // Set the icon, scrolling text and timestamp
            Notification notification = new Notification(R.drawable.stat_sample, text,
                    System.currentTimeMillis());

            // The PendingIntent to launch our activity if the user selects this notification
            PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
                    new Intent(this, ForegroundServiceController.class), 0);

            // Set the info for the views that show in the notification panel.
            notification.setLatestEventInfo(this, getText(R.string.local_service_label),
                           text, contentIntent);
           
            startForegroundCompat(R.string.foreground_service_started, notification);
           
        } else if (ACTION_BACKGROUND.equals(intent.getAction())) {
            stopForegroundCompat(R.string.foreground_service_started);
        }
    }
   
    /**
     * This is a wrapper around the new startForeground method, using the older
     * APIs if it is not available.
     */
    void startForegroundCompat(int id, Notification notification) {
        // If we have the new startForeground API, then use it.
        if (mStartForeground != null) {
            mStartForegroundArgs[0] = Integer.valueOf(id);
            mStartForegroundArgs[1] = notification;
            try {
                mStartForeground.invoke(this, mStartForegroundArgs);
            } catch (InvocationTargetException e) {
                // Should not happen.
                Log.w("ApiDemos", "Unable to invoke startForeground", e);
            } catch (IllegalAccessException e) {
                // Should not happen.
                Log.w("ApiDemos", "Unable to invoke startForeground", e);
            }
            return;
        }
       
        // Fall back on the old API.
        setForeground(true);
        mNM.notify(id, notification);
    }
   
    /**
     * This is a wrapper around the new stopForeground method, using the older
     * APIs if it is not available.
     */
    void stopForegroundCompat(int id) {
        // If we have the new stopForeground API, then use it.
        if (mStopForeground != null) {
            mStopForegroundArgs[0] = Boolean.TRUE;
            try {
                mStopForeground.invoke(this, mStopForegroundArgs);
            } catch (InvocationTargetException e) {
                // Should not happen.
                Log.w("ApiDemos", "Unable to invoke stopForeground", e);
            } catch (IllegalAccessException e) {
                // Should not happen.
                Log.w("ApiDemos", "Unable to invoke stopForeground", e);
            }
            return;
        }
       
        // Fall back on the old API.  Note to cancel BEFORE changing the
        // foreground state, since we could be killed at that point.
        mNM.cancel(id);
        setForeground(false);
    }
   
    @Override
    public void onDestroy() {
        // Make sure our notification is gone.
        stopForegroundCompat(R.string.foreground_service_started);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}