Android - Cant see the incoming calls when LayoutParams.TypeSystemError is displayed

Question

I\'m developing lock screen app. Here Lock screen is displayed on the top of the screen using this command \"WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;\"

But my prob

Answer 1

1. Add receiver in the manifest and ask for permission

2. Create class IncomingCall

   public class IncomingCall extends BroadcastReceiver {
   
   public void onReceive(Context context, Intent intent) {
   
       try {
               TelephonyManager telephonyManager = (TelephonyManager) context
                       .getSystemService(Context.TELEPHONY_SERVICE);
   
               MyPhoneStateListener PhoneListener = new MyPhoneStateListener();
   
               // Register listener for LISTEN_CALL_STATE
               telephonyManager.listen(PhoneListener, PhoneStateListener.LISTEN_CALL_STATE);
   
       } catch (Exception e) {
           e.printStackTrace();
       }
   

3. Implement PhoneStateListener in LockScreen and call onCallStateChanged

   private class LockScreen extends AppCompatActivity implements PhoneStateListener{
   
       public void onCallStateChanged(int state, String incomingNumber) {
   
           //Disable lockscreen when calls come
   
       }