(一)Dialog简介

Dialog是Android开发中需要经常使用的系统组件之一，AlertDialog可以显示一个、两个等多个按钮，使用setMessage()方法可以只显示字符串提示信息，当然用户也可以自定义自己的AlertDialog。

1. 构造方法

更改主题

2.  常用方法

（二）代码实现

MainActivity代码

package com.example.mydialog;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.widget.ListAdapter;
import android.widget.SimpleAdapter;
public class MainActivity extends Activity {
private ArrayList<HashMap<String, Object>> listItem;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
openDialog();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void openDialog() {
new AlertDialog.Builder(MainActivity.this).setTitle("自定义Dialog")
.setIcon(R.drawable.albums)
.setAdapter(getAdaper(), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
// 获取选中项的内容
Log.d("测试", listItem.get(which).get("ItemManager")
.toString());
}
}).show();
}
public ListAdapter getAdaper() {
listItem = new ArrayList<HashMap<String, Object>>();
HashMap<String, Object> map1 = new HashMap<String, Object>();
map1.put("ImageManager", R.drawable.compose);
map1.put("ItemManager", "录入");
listItem.add(map1);
HashMap<String, Object> map2 = new HashMap<String, Object>();
map2.put("ImageManager", R.drawable.camera);
map2.put("ItemManager", "拍照");
listItem.add(map2);
HashMap<String, Object> map4 = new HashMap<String, Object>();
map4.put("ImageManager", R.drawable.delete1);
map4.put("ItemManager", "删除");
listItem.add(map4);
SimpleAdapter listItemAdapter = new SimpleAdapter(this, listItem,
R.layout.mydialog,
new String[] { "ImageManager", "ItemManager" }, new int[] {
R.id.p_w_picpath, R.id.text });
return listItemAdapter;
}
}mydialog.xml文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="horizontal"android:gravity="center_vertical"><ImageView android:id="@+id/p_w_picpath"android:layout_width="38dp"android:layout_height="38dp"/><TextViewandroid:id="@+id/text"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_centerVertical ="true"android:textColor="#000000" /></RelativeLayout>

效果如下：