android - 安卓接听电话

Question

android2.3之后我们不能使用java reflect来接听电话。所以找到了另一种方式来acswer：

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");
}

我在里面找到了一些信息mediaButtonBroadcastReceive，AudiaService但是我没有找到处理事件的直接类。谁能告诉我？