AlertDialog自定义控件

点击enter按钮会关闭对话框，留在当前Activity，点击exit按钮则退出应用。

首先是main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#FFFFFFFF"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

</LinearLayout>

主Activity代码CustomAlertDialogActivity.java：

package nbe.sense7.vinci.custom.alertdialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageButton;

public class CustomAlertDialogActivity extends Activity {
    /** Called when the activity is first created. */
    private Button button;
自定义对话框布局文件custom_alertdialog.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:layout_margin="15dp"
    android:gravity="center_horizontal"
    android:orientation="horizontal"
    android:background="@drawable/dialog_bg">
    
    <!-- enter button -->
    <ImageButton 
        android:id="@+id/enter_btn"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"