call auto answer in android example

Call auto answer android

         Call anto answer android is a great feature to attend the call without click any buttons.Its very useful when the user is in drive or hands busy with other works.

//study about call logs

Steps:
1.your have to check the phone is ringing or not.

TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);

if (tm.getCallState() != TelephonyManager.CALL_STATE_RINGING) {

return;

}

2)if phone is in ringing state answer the call.

// Simulate a press of the headset button to pick up the call

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");

Answer the phone calls using AIDL

// Set up communication with the telephony service

TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);

Class c = Class.forName(tm.getClass().getName());

Method m = c.getDeclaredMethod("getITelephony");

m.setAccessible(true);

ITelephony telephonyService;

telephonyService = (ITelephony)m.invoke(tm);

// Silence the ringer and answer the call!

telephonyService.silenceRinger();

//Answer the ringing call

telephonyService.answerRingingCall();

3)optional,If you want to set callautoanswer delay use,

try {

//set thread for delay auto call answer interval .

//here I set 2 seconds.

Thread.sleep(Integer.parseInt(prefs.getString("delay", "2")) * 1000);

} catch (InterruptedException e) {

// We don't really care

}

4)optional,To enable loudspeaker use this code,

AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

audioManager.setSpeakerphoneOn(true);

Download sample code