問題

I am working in Android technology last 1 years. Currently I want develop an application incoming call auto answer in Android 4.0.3 but in this version I am not getting any solution or can't find any api for this (ITelephony.aidl). Please suggest me.

回答1:

Its working code.

First find out that its incoming call using Phone state Broadcast Receiver.

filter.addAction("android.intent.action.PHONE_STATE");

mContext.registerReceiver(myCallReceiver, filter);

and then in onReceive(Context context, Intent intent) call answerPhoneHeadsethook() function.

private void answerPhoneHeadsethook(Context context) {

// 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");

}

回答2:

In order to answer or reject a phone call MODIFY_PHONE_STATE permission is needed. Unfortunately since 2.3 and onwards it is only available for system apps. (more info here)

A workaround to answer the call (originally from here):

Intent i = new Intent(Intent.ACTION_MEDIA_BUTTON);

KeyEvent event = new KeyEvent(KeyEvent.ACTION_DOWN,KeyEvent.KEYCODE_HEADSETHOOK);

i.putExtra(Intent.EXTRA_KEY_EVENT, event );

context.sendOrderedBroadcast(i, null);

回答3:

This works from Android 2.2 to 4.0 and now after adding the try catch to the last line it works for 4.1.2 and 4.2 Frankly speaking dont know how it works but it works for me.

Log.d(tag, "InSecond Method Ans Call");

// 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));

sendOrderedBroadcast(buttonUp, "android.permission.CALL_PRIVILEGED");

Intent headSetUnPluggedintent = new Intent(Intent.ACTION_HEADSET_PLUG);

headSetUnPluggedintent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);

headSetUnPluggedintent.putExtra("state", 0);

headSetUnPluggedintent.putExtra("name", "Headset");

try {

sendOrderedBroadcast(headSetUnPluggedintent, null);

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

This is working for me in Android 4.1.2 as well as i have tested on 4.2

This still gives an exception which is handled.

來源：https://stackoverflow.com/questions/11648587/incoming-call-auto-answer-in-android-4-0-3

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