How to block a mobile number call and message receiving in android application development?

Question

I would like to implement an application for block a mobile number for receiving or sending calls and messages. In my application I am entering mobile number at EditText box then I am clicking a button for block the mobile number which has entered by the user.

I have implemented an activity class as follows:

public class BlockNumberActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ((Button)findViewById(R.id.block)).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                String mobileNumer = ((EditText)findViewById(R.id.mobileNum)).getText().toString();
                //How to block entered mobileNumber
            }
        });

        ((Button)findViewById(R.id.unblock)).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                String mobileNumer = ((EditText)findViewById(R.id.mobileNum)).getText().toString();
                //How to unblock entered mobileNumber
            }
        });
    }
}

I think we may use BroadcastReceiver. But I don't have more knowledge on it. Please give me an idea how to implement blocking or unblocking mobile number. Please any body help me.....

Try to see this [BlockIncoming Messages](http://stackoverflow.com/q/9378431/940096) & [Block Incoming Calls](http://stackoverflow.com/q/2334465/940096) — Praveenkumar, Mar 28 '12 at 10:28

Ronak Mehta · Accepted Answer · 2014-03-27T05:58:05.413

create PhoneCallReceiver .java

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;
public class PhoneCallReceiver extends BroadcastReceiver {  

@Override
public void onReceive(Context context, Intent intent) { 
    TelephonyManager telephony = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
    PhoneCallStateListener customPhoneListener = new PhoneCallStateListener(context);
    telephony.listen(customPhoneListener, PhoneStateListener.LISTEN_CALL_STATE);



}}

now create PhoneCallStateListener .java

import java.lang.reflect.Method;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.media.AudioManager;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.widget.Toast;

import com.android.internal.telephony.ITelephony;

public class PhoneCallStateListener extends PhoneStateListener {    

private Context context;
public PhoneCallStateListener(Context context){
    this.context = context;
}


@Override
public void onCallStateChanged(int state, String incomingNumber) {  
    SharedPreferences prefs=PreferenceManager.getDefaultSharedPreferences(context);

    switch (state) {

        case TelephonyManager.CALL_STATE_RINGING:       

              String block_number = prefs.getString("block_number", null);
            AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 
            //Turn ON the mute
            audioManager.setStreamMute(AudioManager.STREAM_RING, true);                 
            TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            try {
                Toast.makeText(context, "in"+block_number, Toast.LENGTH_LONG).show();
                Class clazz = Class.forName(telephonyManager.getClass().getName());
                Method method = clazz.getDeclaredMethod("getITelephony");
                method.setAccessible(true);
                ITelephony telephonyService = (ITelephony) method.invoke(telephonyManager);     
                //Checking incoming call number
                System.out.println("Call "+block_number);

                if (incomingNumber.equalsIgnoreCase("+91"+block_number)) {
                    //telephonyService.silenceRinger();//Security exception problem
                     telephonyService = (ITelephony) method.invoke(telephonyManager);
                     telephonyService.silenceRinger();
                    System.out.println(" in  "+block_number);
                    telephonyService.endCall();
                }
            } catch (Exception e) {
                Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
            }
            //Turn OFF the mute     
            audioManager.setStreamMute(AudioManager.STREAM_RING, false);
            break;
        case PhoneStateListener.LISTEN_CALL_STATE:

    }
    super.onCallStateChanged(state, incomingNumber);
}}

Now in src create this package com.android.internal.telephony now in this package Right Click -> New -> File now give name ITelephony.aidl and paste this code

package com.android.internal.telephony; 

interface ITelephony {      

  boolean endCall();     

  void answerRingingCall();      

  void silenceRinger(); 
}

NOTE: Code is tested in Android 2.2 (Froyo),2.3 (GingerBread)

how can i execute PhoneCallStateListener class in my app.I mean how it will execute? — prasad.gai, Mar 28 '12 at 09:51
insyead this u can specify this String block_number = "10 digit number"; — Ronak Mehta, Mar 28 '12 at 10:28
i am not getting incoming number at if(incomingNumber.equalsIgnoreCase("+91"+block_number)) — prasad.gai, Mar 28 '12 at 11:26
what ? String block_number = "10 digit number" and now u can use my above coding — Ronak Mehta, Mar 28 '12 at 11:29
i am not getting incoming number at if(incomingNumber.equalsIgnoreCase("5555215556")).i am asking for incomingNumber variable. — prasad.gai, Mar 28 '12 at 11:33
there is no value for incomingNumber for comparing with my 10 digit number — prasad.gai, Mar 28 '12 at 11:34
use country code like if(incomingNumber.equalsIgnoreCase("+91"+"5555215556")) ; — Ronak Mehta, Mar 28 '12 at 11:37
hey i am not getting incomingNumber value for comparring with "+91"+"5555215556" — prasad.gai, Mar 28 '12 at 11:38
not possible , use in device coz i am using this source in my app. — Ronak Mehta, Mar 28 '12 at 11:46
@Rstar BZZZZTTTT!!!! your code will certainly not work for ICS/JB and later because Google has blocked the MODIFY_PHONE_STATE permission since Gingerbread and thus will fail when invoking `endCall` or `cancelMissedCallsNotification` of the ITelephony type interface! See this [issue](https://code.google.com/p/android/issues/detail?id=15031) Otherwise feel free to prove me wrong on this! :) — t0mm13b, Jan 28 '13 at 02:58
@Rstar What permissions are required for this? And the intent-filter to use with the `BroadcastReceiver`. Also, does this work on ICS and Jellybean? — timemanx, Sep 29 '13 at 21:44
@Rstar Okay, I tested your code on my device. It seems it's working except for the `silenceRinger()` function which requires the `MODIFY_PHONE_STATE` permission. — timemanx, Sep 29 '13 at 23:54
why but i'm getting `NoSuchMethodException` at ` Method method = clazz.getDeclaredMethod("getITelephony");` ?? — Uniruddh, Mar 26 '14 at 13:20

score 3 · Answer 2 · edited May 23 '17 at 12:02

3

to block incoming call use this http://androidsourcecode.blogspot.in/2010/10/blocking-incoming-call-android.html and also this http://www.codeproject.com/Questions/333253/Block-Incoming-calls-in-android-without-single-rin ,http://www.anddev.org/post52643.html?hilit=incoming%20call#p52643 or to block outgoing see How to Block outgoing calls and Text SMS and Blocking outgoing calls and texts (BroadcastReceiver or Service?) , Android: Taking complete control of phone(kiosk mode), is it possible? How?

edited May 23 '17 at 12:02

Community

1
1

answered Mar 28 '12 at 09:20

Ronak Mehta

5,971
5
42
69

i would like block a mobile number which has entered by the user only – prasad.gai Mar 28 '12 at 09:28

score 2 · Answer 3 · answered Oct 20 '14 at 11:58

This Code works for me

  try {

            String serviceManagerName = "android.os.ServiceManager";
            String serviceManagerNativeName = "android.os.ServiceManagerNative";
            String telephonyName = "com.android.internal.telephony.ITelephony";
            Class<?> telephonyClass;
            Class<?> telephonyStubClass;
            Class<?> serviceManagerClass;
            Class<?> serviceManagerNativeClass;
            Method telephonyEndCall;
            Object telephonyObject;
            Object serviceManagerObject;
            telephonyClass = Class.forName(telephonyName);
            telephonyStubClass = telephonyClass.getClasses()[0];
            serviceManagerClass = Class.forName(serviceManagerName);
            serviceManagerNativeClass = Class.forName(serviceManagerNativeName);
            Method getService =
                    serviceManagerClass.getMethod("getService", String.class);
            Method tempInterfaceMethod = serviceManagerNativeClass.getMethod(
                    "asInterface", IBinder.class);
            Binder tmpBinder = new Binder();
            tmpBinder.attachInterface(null, "fake");
            serviceManagerObject = tempInterfaceMethod.invoke(null, tmpBinder);
            IBinder retbinder = (IBinder) getService.invoke(
                    serviceManagerObject, "phone");
            Method serviceMethod = telephonyStubClass.getMethod("asInterface",
                    IBinder.class);
            telephonyObject = serviceMethod.invoke(null, retbinder);
            telephonyEndCall = telephonyClass.getMethod("endCall");
            telephonyEndCall.invoke(telephonyObject);

        }
    } catch (Exception e) {
        e.printStackTrace();
        Toast.makeText(context, "Unable to Block Call", Toast.LENGTH_SHORT).show();


    }

score 0 · Answer 4 · edited May 18 '18 at 05:49

0

To block a call of any specific contact number, then this tutorial will help you in solving your problem. http://androiddesk.wordpress.com/2012/08/02/blocking-a-call-without-user-intervention-in-android/

edited May 18 '18 at 05:49

Sethuraman Srinivasan

1,528
1
20
34

answered Dec 20 '12 at 04:48

Pir Fahim Shah

10,505
1
82
81

score -1 · Answer 5 · answered Mar 21 '14 at 09:49

this code is working...

first download this class ITelephony

if ((state != null)
                && (state.equals(TelephonyManager.EXTRA_STATE_RINGING))) {
            CallLogReceiver.phoneNo = intent.getExtras().getString(
                    "incoming_number");

            if (CallLogReceiver.blockNo.equals(CallLogReceiver.phoneNo)) {

                Intent blockCallIntent = new Intent();
                blockCallIntent.setClassName("com.example.calllogdemo",
                        "com.example.calllogdemo.BlockCallActivity");
                blockCallIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                blockCallIntent
                        .putExtra("blockNo", CallLogReceiver.phoneNo);
                context.startActivity(blockCallIntent);
                try {
                    TelephonyManager telephonyManager = (TelephonyManager) context
                            .getSystemService(Context.TELEPHONY_SERVICE);

                    Class<?> classTelephony = Class
                            .forName(telephonyManager.getClass().getName());
                    Method methodGetITelephony = classTelephony
                            .getDeclaredMethod("getITelephony");

                    methodGetITelephony.setAccessible(true);

                    ITelephony telephonyService = (ITelephony)         methodGetITelephony
                            .invoke(telephonyManager);

                    telephonyService.endCall();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }

and use this permission in manifest file

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

How to block a mobile number call and message receiving in android application development?

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