End call in android programmatically

Question

I see a lot of questions that it's impossible to end call programmatically in Android. At the same time, I see a lot of dialer apps in googleplay market where you can activate the call and drop it also. How do they work?

Edit: I've read somewhere that my app has to be system app. Then how to make it system, and what is the difference between system and user apps?

Answer 1

You do not need to be a system app. First, create package com.android.internal.telephony in your project, and put this in a file called "ITelephony.aidl":

package com.android.internal.telephony;   interface ITelephony {        boolean endCall();       void answerRingingCall();        void silenceRinger();   } 

Once you have that, you can use this code to end a call:

TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE); Class clazz = Class.forName(telephonyManager.getClass().getName()); Method method = clazz.getDeclaredMethod("getITelephony"); method.setAccessible(true); ITelephony telephonyService = (ITelephony) method.invoke(telephonyManager); telephonyService.endCall(); 

You could use this inside a PhoneStateListener, for example. For this to work, you require permissions in manifest:

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

Edit: Apologies for horrible formatting, I still can't figure out how to properly do code blocks here :/

Answer 2

For Android P (since Beta 2) and above, there is finally a formal API for endCall:

https://developer.android.com/reference/android/telecom/TelecomManager#endCall()

The ANSWER_PHONE_CALLS permission is required in manifest:

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

With the permission, for API level 28 or above:

TelecomManager tm = (TelecomManager) mContext.getSystemService(Context.TELECOM_SERVICE);  if (tm != null) {     boolean success = tm.endCall();     // success == true if call was terminated. } 

At the same time the original endCall() method under TelephonyManager is now protected by MODIFY_PHONE_STATE permission, and can no longer be invoked by non-system Apps by reflection without the permission (otherwise a Security Exception will be triggered).