27-Dialog练习题，点击弹出一个对话框，选项是一个列表

MainActivity.java

package com.example.dialoglisttest;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.SimpleAdapter;import android.widget.TextView;public class MainActivity extends Activity {final int LIST_DIALOG = 0x001;// 定义一个资源数组，分别为图片和名称public int[] images = { R.drawable.bird, R.drawable.dolphin,R.drawable.panda };public String[] names = { "画眉鸟", "海豚", "熊猫" };@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button btnShow = (Button) findViewById(R.id.btnSelect);btnShow.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {// 显示DialogshowDialog(LIST_DIALOG);}});}@Overrideprotected Dialog onCreateDialog(int id) {switch (id) {case LIST_DIALOG:// 创建一个builder实例Builder builder = new AlertDialog.Builder(MainActivity.this);// 设置对话框的图标和名称builder.setIcon(R.drawable.tool);builder.setTitle("动物列表");// 创建一个List集合，用来存放列表项List<Map<String, Object>> listitems = new ArrayList<Map<String, Object>>();// 使用for循环将数据添加到listitems集合中去for (int i = 0; i < images.length; i++) {Map<String, Object> listitem = new HashMap<String, Object>();listitem.put("image", images[i]);listitem.put("names", names[i]);listitems.add(listitem);}// 创建SimpleAdapterSimpleAdapter adapter = new SimpleAdapter(this, listitems,R.layout.row, new String[] { "image", "names" }, new int[] {R.id.image, R.id.name });/** * 设置一个列表项 */builder.setAdapter(adapter, new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {TextView textView = (TextView) findViewById(R.id.text);ImageView imageView=(ImageView) findViewById(R.id.imageShow);textView.setText("你所选择的喜欢的动物是:" + names[which]);imageView.setImageResource(images[which]);}});// 创建builderbuilder.create();// 显示builderbuilder.show();}return null;}}

row.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <ImageView        android:id="@+id/image"        android:layout_width="80dp"        android:layout_height="80dp"        android:paddingLeft="10pt" />    <TextView        android:id="@+id/name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:paddingLeft="10pt" /></LinearLayout>

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:gravity="center_horizontal"    android:orientation="vertical" >    <TextView        android:id="@+id/text"        android:layout_width="fill_parent"        android:layout_height="50dp"        android:hint="显示你所选择的动物"        android:text=""        android:textSize="20dp" />    <ImageView        android:id="@+id/imageShow"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <Button        android:id="@+id/btnSelect"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="选择你所喜欢的的动物" /></LinearLayout>