我正在写一个Android应用程序,我需要接听来电,做一些工作,然后结束通话.
在所有谷歌搜索之后,我可以找到两种不同的方法来实现这一点,这两种方法都不适用于Android的最新版本,特别是在4.1,Jelly Bean之后.

I.)使用广播接收器中的Java Reflection为“android.intent.action.PHONE_STATE”访问“com.android.internal.telephony.ITelephony”.下面的示例代码可以在数百个相关帖子中找到：

public class PhoneCallReceiver extends BroadcastReceiver {
 Context context = null;
 private static final String TAG = "Phone call";
 private ITelephony telephonyService;

@Override
 public void onReceive(Context context, Intent intent) {
  if (!intent.getAction().equals("android.intent.action.PHONE_STATE")) 
    return;

  Log.v(TAG, "Receving....");
  TelephonyManager telephony = (TelephonyManager) 
  context.getSystemService(Context.TELEPHONY_SERVICE);  
  try {
      Log.v(TAG, "Get getTeleService...");
      Class c = Class.forName(telephony.getClass().getName());
      Method m = c.getDeclaredMethod("getITelephony");
      m.setAccessible(true);
      telephonyService = (ITelephony) m.invoke(telephony);
      telephonyService.silenceRinger();
      Log.v(TAG, "Answering Call now...");
      telephonyService.answerRingingCall();
      Log.v(TAG, "Call answered...");
      //telephonyService.endCall();
  } catch (Exception e) {
   e.printStackTrace();
   Log.e(TAG,
           "FATAL ERROR: could not connect to telephony subsystem");
   Log.e(TAG, "Exception object: " + e);
  }
 }
}

这段代码的问题在于

<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" /> 

此方法需要工作,并且此权限已被定义为android v 2.3中的“仅适用于系统应用程序”.简而言之,普通用户应用程序无法再在清单文件中定义此权限.

II.)另一种方法是模拟推动Headset钩子,这使Android接听电话.这是通过广播“Intent.ACTION_MEDIA_BUTTON”来完成的,如下面的代码所示.

public class PhoneCallReceiver extends BroadcastReceiver {
 Context context = null;
 private static final String TAG = "Phone call";

 @Override
 public void onReceive(Context context, Intent intent) {
     if (!intent.getAction().equals("android.intent.action.PHONE_STATE")) 
         return;

     String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
     if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
         String number = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);

         Intent answer = new Intent(Intent.ACTION_MEDIA_BUTTON);
         answer.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
         context.sendOrderedBroadcast(answer, null);
         Log.d(TAG, "Answered incoming call from: " + number);
     }   
     return;
 } 
}

此方法适用于Android 4.1,之后android限制用户应用程序广播“Intent.ACTION_MEDIA_BUTTON”.

所以我的结论是,目前我们无法在Android 4.1或更高版本中实现这一目标.

有没有其他人找到这个问题的任何其他解决方案或解决方法？

解决方法:

这适用于从Android 2.2到4.0,现在将try catch添加到最后一行后,它适用于4.1.2和4.2坦率地说,不知道它是如何工作的,但它适用于我.

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) { 
    e.printStackTrace();
}

这对我在Android 4.1.2中工作以及我在4.2上测试过
这仍然是一个处理的异常.

编辑结束通话

希望这有助于所有寻找答案和结束通话的整体解决方案的人.

/**
 * Reject button click listener will reject the incoming call.
 */
private class RejectCallOnClickListener implements OnClickListener {
    @Override
    public void onClick(View v) {
        Log.d(tag, "OnRejectButton: " + "Reject OnClick");
        ignoreCall();
        exitCleanly();
    }
}

/**
 * ignore incoming calls
 */
private void ignoreCall() {
    if (USE_ITELEPHONY)
        ignoreCallAidl();
    else
        ignoreCallPackageRestart();
}
/**
 * AIDL/ITelephony technique for ignoring calls
 */
private void ignoreCallAidl() {
    try {
        // telephonyService.silenceRinger();

        telephonyService.endCall();
    } catch (RemoteException e) {
        e.printStackTrace();
        Log.d(tag, "ignoreCall: " + "Error: " + e.getMessage());

    } catch (Exception e) {
        e.printStackTrace();
        Log.d(tag, "ignoreCall" + "Error: " + e.getMessage());

    }
}
/**
 * package restart technique for ignoring calls
 */
private void ignoreCallPackageRestart() {
    ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
    am.restartPackage("com.android.providers.telephony");
    am.restartPackage("com.android.phone");
}
/**
 * cleanup and exit routine
 */
private void exitCleanly() {
    unHookReceiver();
    this.finish();

}