In my app I will maintain a list of contacts.
Any calls from contacts in the list will be dropped. They will show under missed calls but the phone will not ring.
First create this Interface:
public interface ITelephony {
boolean endCall();
void answerRingingCall();
void silenceRinger();
}
Then Create this class that extends BroadcastReceiver
public class IncomingCallReceiver extends BroadcastReceiver {
private ITelephony telephonyService;
private String blacklistednumber = "+458664455";
@Override
public void onReceive(Context context, Intent intent) {
TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
try {
Class c = Class.forName(tm.getClass().getName());
Method m = c.getDeclaredMethod("getITelephony");
m.setAccessible(true);
ITelephony telephonyService = (ITelephony) m.invoke(tm);
Bundle bundle = intent.getExtras();
String phoneNumber = bundle.getString("incoming_number");
Log.e("INCOMING", phoneNumber);
if ((phoneNumber != null) && phoneNumber.equals(blacklistednumber)) {
telephonyService.silenceRinger();
telephonyService.endCall();
Log.e("HANG UP", phoneNumber);
}
} catch (Exception e) {
e.printStackTrace();
}
}
This will only block that single phonenumber, but you get the point.
In your manifest add this:
<receiver android:name=".IncomingCallReceiver">
<intent-filter android:priority="999">
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
</receiver>
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.PROCESS_INCOMING_CALLS" />