Anzeigefehler bei AlertDialog Button

1package com.test.keks;
2
3
4import android.app.Activity;
5import android.app.AlertDialog;
6import android.content.DialogInterface;
7import android.os.Bundle;
8import android.view.View;
9import android.widget.Button;
10
11public class Keks extends Activity {
12
13 @Override
14 public void onCreate(Bundle savedInstanceState) {
15 super.onCreate(savedInstanceState);
16 setContentView(R.layout.main);
17
18 Button b = (Button) findViewById(R.id.button);
19 b.setOnClickListener(new View.OnClickListener() {
20
21 @Override
22 public void onClick(View v) {
23 showDialog();
24 }
25 });
26 }
27
28 public void showDialog() {
29 AlertDialog.Builder builder = new AlertDialog.Builder(this);
30 builder.setTitle("AlertDialog");
31 builder.setMessage("this is a test button");
32 builder.setNeutralButton("OK", new DialogInterface.OnClickListener() {
33 @Override
34 public void onClick(DialogInterface dialog, int which) {
35 return;
36 }
37 });
38 AlertDialog alert = builder.create();
39 alert.show();
40 }
41
42}

1<?xml version="1.0" encoding="utf-8"?>
2<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
3 android:orientation="vertical"
4 android:layout_width="fill_parent"
5 android:layout_height="fill_parent"
6 >
7 <Button android:id="@+id/button"
8 android:layout_height="wrap_content"
9 android:layout_width="fill_parent"
10 android:text="AlertDialog Button"
11 android:layout_alignParentBottom="true"/>
12</RelativeLayout>