Принудительно закрыть в приложении для Android

В моем коде нет ошибки, но приложение закрывается при запуске. Ниже приведен код.

package com.amit.wozzle;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
private Button b1;
private Button b2;
private Button b3;
private Button b4;
private Button b5;
private Button b6;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    b1 = (Button) findViewById(R.id.g1);
    b2 = (Button) findViewById(R.id.g2);
    b3 = (Button) findViewById(R.id.g3);
    b4 = (Button) findViewById(R.id.g4);
    b5 = (Button) findViewById(R.id.g5);
    b6 = (Button) findViewById(R.id.g6);


    b1.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent r1= new Intent("com.amit.wozzle.GAMEPLAY");
            r1.putExtra("choice", 1);
            startActivity(r1);
        }
    });


    b2.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent r1= new Intent("com.amit.wozzle.GAMEPLAY");
            r1.putExtra("choice", 2);
            startActivity(r1);
        }
    });


    b3.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent r1= new Intent("com.amit.wozzle.GAMEPLAY");
            r1.putExtra("choice", 3);
            startActivity(r1);
        }
    });


    b4.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent r1= new Intent("com.amit.wozzle.GAMEPLAY");
            r1.putExtra("choice", 4);
            startActivity(r1);
        }
    });


    b5.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent r1= new Intent("com.amit.wozzle.GAMEPLAY");
            r1.putExtra("choice", 5);
            startActivity(r1);
        }
    });


    b6.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent r1= new Intent("com.amit.wozzle.GAMEPLAY");
            r1.putExtra("choice", 6);
            startActivity(r1);
        }
    });




}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

Это логкэт.

07-15 12:57:37.632: D/AndroidRuntime(666): Shutting down VM
07-15 12:57:37.632: W/dalvikvm(666): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-15 12:57:37.642: E/AndroidRuntime(666): FATAL EXCEPTION: main
07-15 12:57:37.642: E/AndroidRuntime(666): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.amit.wozzle/com.amit.wozzle.MainActivity}:    java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in    AdapterView
07-15 12:57:37.642: E/AndroidRuntime(666):  at   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
07-15 12:57:37.642: E/AndroidRuntime(666):  at   android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.os.Looper.loop(Looper.java:123)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.app.ActivityThread.main(ActivityThread.java:4627)
07-15 12:57:37.642: E/AndroidRuntime(666):  at java.lang.reflect.Method.invokeNative(Native Method)
07-15 12:57:37.642: E/AndroidRuntime(666):  at java.lang.reflect.Method.invoke(Method.java:521)
07-15 12:57:37.642: E/AndroidRuntime(666):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-15 12:57:37.642: E/AndroidRuntime(666):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-15 12:57:37.642: E/AndroidRuntime(666):  at dalvik.system.NativeStart.main(Native Method)
07-15 12:57:37.642: E/AndroidRuntime(666): Caused by: java.lang.UnsupportedOperationException: addView(View, LayoutParams) is not supported in AdapterView
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.widget.AdapterView.addView(AdapterView.java:461)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:622)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
07-15 12:57:37.642: E/AndroidRuntime(666):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.app.Activity.setContentView(Activity.java:1647)
07-15 12:57:37.642: E/AndroidRuntime(666):  at com.amit.wozzle.MainActivity.onCreate(MainActivity.java:23)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-15 12:57:37.642: E/AndroidRuntime(666):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
07-15 12:57:37.642: E/AndroidRuntime(666):  ... 11 more

Может ли кто-нибудь сказать, что за ошибка?