OutgoingCallInterceptor.java

package nl.codestone.cookbook.outgoingcallinterceptor;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class OutgoingCallInterceptor extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        final String originalNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);

        this.setResultData("0123456789");

        final String newNumber = this.getResultData();

        String msg = "Intercepted outgoing call. Old number " + originalNumber + ", new number " + newNumber;

        Toast.makeText(context, msg, Toast.LENGTH_LONG).show();

    }

}