Click here to Skip to main content
13,195,146 members (69,630 online)
Rate this:
Please Sign up or sign in to vote.
See more:
import java.lang.reflect.Method;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.widget.Toast;
public class PhoneCallStateListener extends PhoneStateListener {	
	private Context context;
	public PhoneCallStateListener(Context context){
		this.context = context;
	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");
		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);
		System.out.println(" in  "+block_number);
		} catch (Exception e) {
		Toast.makeText(context, e.toString(), Toast.LENGTH_LONG).show();
			//Turn OFF the mute		
		audioManager.setStreamMute(AudioManager.STREAM_RING, false);
		case PhoneStateListener.LISTEN_CALL_STATE:
		super.onCallStateChanged(state, incomingNumber);

Though this code i am able to block incoming calls but problems it rings for fraction of seconds before disconnection of time how can i directly disconnect phone without single ringing
Posted 20-Feb-12 20:16pm
cute_friend7077 8-Mar-13 0:07am
code is working on emulator but not on real device having os ICS 4.0.4
Rate this: bad
Please Sign up or sign in to vote.

Solution 2

public class myActivity extends BroadcastReceiver
public void onReceive(Context context, Intent intent)

String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
setResultData(null); //It will terminate the call
Toast.makeText(context, "Call Terminated" + number, 5000).show();


Hope it helps
Sahil Mahajan(eMM jAY)

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
Top Experts
Last 24hrsThis month

Advertise | Privacy |
Web03 | 2.8.171019.1 | Last Updated 25 Aug 2012
Copyright © CodeProject, 1999-2017
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100