Android : How to send the incoming phone call number to another activity using intent

Like what the title says and i want to display the phone number to a textView then masking the last 4 digits if possible, but i can't run it properly, the application suddenly stops... here is a sample/reference code of what i want to do. If using toast it displays the number but when am using intent my code does not work runtime error

Sender(2nd Activity)

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.widget.Toast;


public class MyCallReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_RINGING)) {



            String incomingNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);

            Intent a = new Intent(context,MainActivity.class);
            a.putExtra("key", incomingNumber);
            context.startActivity(a);

    }

main activity

import android.os.Bundle;
import android.app.Activity;
import android.widget.TextView;

public class MainActivity extends Activity {

    TextView tv1,tv2;
    String gotBread;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initialize();
        tv1.setSelected(true);
        Bundle gotBasket = getIntent().getExtras();
        gotBread = gotBasket.getString("key");
        tv2.setText(gotBread);


    }

    public void initialize() {
        // TODO Auto-generated method stub
        tv1 = (TextView) this.findViewById(R.id.tV1);
        tv2 = (TextView) this.findViewById(R.id.tV2);
    }

}

here is my logcat hope it helps...

08-18 02:50:10.121: D/AndroidRuntime(1306): Shutting down VM 08-18 02:50:10.121: W/dalvikvm(1306): threadid=1: thread exiting with uncaught exception (group=0xb2a3fba8) 08-18 02:50:10.131: E/AndroidRuntime(1306): FATAL EXCEPTION: main 08-18 02:50:10.131: E/AndroidRuntime(1306): Process: com.example.detectincomingcall, PID: 1306 08-18 02:50:10.131: E/AndroidRuntime(1306): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.detectincomingcall/com.example.detectincomingcall.MainActivity}: java.lang.NullPointerException 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.ActivityThread.access$800(ActivityThread.java:135) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.os.Handler.dispatchMessage(Handler.java:102) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.os.Looper.loop(Looper.java:136) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.ActivityThread.main(ActivityThread.java:5017) 08-18 02:50:10.131: E/AndroidRuntime(1306): at java.lang.reflect.Method.invokeNative(Native Method) 08-18 02:50:10.131: E/AndroidRuntime(1306): at java.lang.reflect.Method.invoke(Method.java:515) 08-18 02:50:10.131: E/AndroidRuntime(1306): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 08-18 02:50:10.131: E/AndroidRuntime(1306): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 08-18 02:50:10.131: E/AndroidRuntime(1306): at dalvik.system.NativeStart.main(Native Method) 08-18 02:50:10.131: E/AndroidRuntime(1306): Caused by: java.lang.NullPointerException 08-18 02:50:10.131: E/AndroidRuntime(1306): at com.example.detectincomingcall.MainActivity.onCreate(MainActivity.java:21) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.Activity.performCreate(Activity.java:5231) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 08-18 02:50:10.131: E/AndroidRuntime(1306): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 08-18 02:50:10.131: E/AndroidRuntime(1306): ... 11 more