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POHow to stop handler inside BroadcastReceiver after phone call is answered or canceled?
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  1. POHow to stop handler inside BroadcastReceiver after phone call is answered or canceled?
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    copied!<p>I'm trying to create simple Android application that simulate camera flashlight blink while phone call is received. If the user answer or cancel the call, I want to stop the flashlight blink. I'm using Handler and Runnable to simulate blinking, but the problem is that I can't stop the handler after user answer or cancel the call. My source code:</p> <pre><code>public class CallReceiver extends BroadcastReceiver { private static Camera cam = null; private Handler handler = new Handler(); @Override public void onReceive(Context context, Intent intent) { //device is ringing if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_RINGING)) { if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) { startFlashBlink(); } } //call was answered or canceled else if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_IDLE) || intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_OFFHOOK)) { stopFlashBlink(); } } //for simulating flash blink Runnable flashBlinkRunnable = new Runnable() { public void run() { cam = Camera.open(); Parameters p = cam.getParameters(); p.setFlashMode(Parameters.FLASH_MODE_TORCH); cam.setParameters(p); cam.startPreview(); cam.stopPreview(); cam.release(); cam = null; handler.post(flashBlinkRunnable); } }; //start flash blink light public void startFlashBlink() { flashBlinkRunnable.run(); } //stop flash blink light public void stopFlashBlink() { handler.removeCallbacks(flashBlinkRunnable); if (cam != null) { cam.stopPreview(); cam.release(); cam = null; } } } </code></pre>
 

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