android answer incoming call

I have intercepted incoming call and show my activity over standard screen. On this activity I have buttons "answer call" and "reject call", but I can't do it working.

I have found two solutions to answer/reject phone call programaticaly:

With ITelephony.aidl but it works only before api v10. So it is wrong way

With following:

private void acceptCall(Context context) {
  Intent buttonDown = new Intent(Intent.ACTION_MEDIA_BUTTON);
  buttonDown.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(
        KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
  context.sendOrderedBroadcast(buttonDown,
        "android.permission.CALL_PRIVILEGED");
    // froyo and beyond trigger on buttonUp instead of buttonDown
  Intent buttonUp = new Intent(Intent.ACTION_MEDIA_BUTTON);
  buttonUp.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(
        KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
  context.sendOrderedBroadcast(buttonUp,
        "android.permission.CALL_PRIVILEGED");
}


private void acceptCall(Context context) {
  Intent buttonDown = new Intent(Intent.ACTION_MEDIA_BUTTON);
  buttonDown.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(
        KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HEADSETHOOK));
  context.sendOrderedBroadcast(buttonDown,
        "android.permission.CALL_PRIVILEGED");
  // froyo and beyond trigger on buttonUp instead of buttonDown
  Intent buttonUp = new Intent(Intent.ACTION_MEDIA_BUTTON);
  buttonUp.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(
        KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
  context.sendOrderedBroadcast(buttonUp,
        "android.permission.CALL_PRIVILEGED");
}

from here http://www.codeproject.com/Tips/578817/Reject-and-Accept-an-Incoming-Call

However nothing! I click buttons and invoke methods above accordingly, and nothing happens. I tested it on several devices, and result the same.

Hmm, then I was successful with answering on samsung nexus one, but not on HTC with sense. Reject function doesnt work on both.

Solution

As result I have found http://androidbridge.blogspot.com/2011/05/how-to-answer-incoming-call-in-android.html

Here is solution which works on HTCs devices:

In Android 2.3.3 HTC Sensation this piece of code does not work. Reason is in 2.3.3 I found a HeadsetObserver listening for actual bluetooth plug-in event. So you need to send a Intent pretending there is a headset connected already. To fix this problem you need to send the ACTION_HEADSET_PLUG Intent before calling the above code.

So I added following code before accept call code:

Intent headSetUnPluggedintent = new Intent(Intent.ACTION_HEADSET_PLUG);
 headSetUnPluggedintent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
 headSetUnPluggedintent.putExtra("state", 1); // 0 = unplugged  1 = Headset with microphone 2 = Headset without microphone
 headSetUnPluggedintent.putExtra("name", "Headset");
 // TODO: Should we require a permission?
 sendOrderedBroadcast(headSetUnPluggedintent, null);

so final worked code is

    private void acceptCall() {
    setHeadSetConnectEmulated();
    Intent buttonUP = new Intent(Intent.ACTION_MEDIA_BUTTON);
    buttonUP.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
    IncomingCallActivity.this.getApplicationContext().sendOrderedBroadcast(buttonUP, "android.permission.CALL_PRIVILEGED");
}

private void setHeadSetConnectEmulated(){
    Intent headSetUnPluggedintent = new Intent(Intent.ACTION_HEADSET_PLUG);
    headSetUnPluggedintent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
    headSetUnPluggedintent.putExtra("state", 1); // 0 = unplugged  1 = Headset with microphone 2 = Headset without microphone
    headSetUnPluggedintent.putExtra("name", "Headset");
    // TODO: Should we require a permission?
    sendOrderedBroadcast(headSetUnPluggedintent, null);
}

private void rejectCall() {
    Intent buttonDown = new Intent(Intent.ACTION_MEDIA_BUTTON);
    buttonDown.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HEADSETHOOK));
    IncomingCallActivity.this.getApplicationContext().sendOrderedBroadcast(buttonDown, "android.permission.CALL_PRIVILEGED");
}