Android学习之对话框（复选按钮）

MyDialogDemo.java:

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MyDialogDemo extends Activity {
	private Button mybut = null ;	// 定义按钮
	private TextView mych = null ;	// 定义文本
	private String fruitData [] = new String[] { "苹果", "西瓜", "水蜜桃" };
	private boolean chData[] = new boolean[] { true, true, false };
	@Override 
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		super.setContentView(R.layout.main); // 调用布局管理器
		this.mybut = (Button) super.findViewById(R.id.mybut) ;	// 取得按钮
		this.mych = (TextView) super.findViewById(R.id.mych) ;	// 取得文本
		this.mybut.setOnClickListener(new OnClickListenerImpl()) ;	// 设置事件类
	}
	private class OnClickListenerImpl implements OnClickListener {
 
		@Override
		public void onClick(View view) {
			Dialog dialog = new AlertDialog.Builder(MyDialogDemo.this)
				.setIcon(R.drawable.pic_m) 
				.setTitle("请选择你喜欢吃的水果？")
				.setPositiveButton("确定", new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface dialog, int which) {
					}
				})
				.setNegativeButton("取消", new DialogInterface.OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						
					}
							})
					.setMultiChoiceItems(MyDialogDemo.this.fruitData,
							MyDialogDemo.this.chData,
							new DialogInterface.OnMultiChoiceClickListener() {
								@Override
								public void onClick(DialogInterface dialog,
										int which, boolean isChecked) {
									for (int x = 0; x < MyDialogDemo.this.fruitData.length; x++) {
										if(x == which && isChecked) {	// 当前选项被选中
											MyDialogDemo.this.mych
													.append(MyDialogDemo.this.fruitData[x]
															+ "、");
										}
									}
								}
							}).create();
			dialog.show() ;
		}
		
	}

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView
		android:id="@+id/mych"
		android:text="" 
		android:layout_width="wrap_content"
		android:layout_height="wrap_content" />
	<Button 
		android:id="@+id/mybut"
		android:text="选择水果"
		android:layout_width="wrap_content" 
		android:layout_height="wrap_content"/>
</LinearLayout> 

 friut_data.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
	<string-array name="fruit_labels">
		<item>苹果</item>
		<item>西瓜</item>
		<item>水蜜桃</item>
	</string-array>
</resources>