Android中的几种对话框（AlertDialog）

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Android中常用的对话框有【确认/取消】对话框 ,带3个按钮的对话框,列表对话框,单选列表对话框,多选列表对话框,水平进度对话框等。其中进度对话框由ProgressDialog创建，其他几种由AlertDialog.Builder创建。

常用方法：

setIcon 设置对话框标题栏左侧的那个图标

setTitle 设置对话框标题栏的提示信息

setMessage 设置对话框主体部分的提示信息

setPositiveButton 设置确定按钮

setNegativeButton 设置取消按钮

setCancelable设置对话框在点击返回键时是否会关闭

show 显示对话框

xml代码如下：

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.dialog.MainActivity" >    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="click1"        android:text="确定取消对话框" />     <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="click2"        android:text="带3个按钮的对话框" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="click3"        android:text="单选对话框" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="click4"        android:text="多选对话框" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:onClick="click5"        android:text="进度条对话框" /></LinearLayout>

主程序代码如下

package com.example.dialog;import android.app.Activity;import android.app.AlertDialog;import android.app.ProgressDialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.content.DialogInterface.OnMultiChoiceClickListener;import android.os.Bundle;import android.view.View;import android.widget.Toast;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);}public void click1(View v){    Builder builder = new AlertDialog.Builder(this);    //设置图标    builder.setIcon(android.R.drawable.ic_dialog_alert);    //设置标题    builder.setTitle("确定取消对话框");    //设置内容    builder.setMessage("确定取消对话框");    //设置确定按钮    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            Toast.makeText(MainActivity.this, "你选择了确定", 0).show();          }    });    //设置取消按钮    builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            Toast.makeText(MainActivity.this, "你选择了取消", 0).show();          }    });    builder.show();}public void click2(View v){    Builder builder = new AlertDialog.Builder(this);    //设置图标    builder.setIcon(android.R.drawable.ic_dialog_alert);    //设置标题    builder.setTitle("确定取消对话框");    //设置内容    builder.setMessage("三个按钮的对话框");    //设置确定按钮    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            Toast.makeText(MainActivity.this, "你选择了确定", 0).show();          }    });    //设置忽略按钮    builder.setNeutralButton("忽略", new OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            Toast.makeText(MainActivity.this, "你选择了忽略", 0).show();        }    });    //设置取消按钮    builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            Toast.makeText(MainActivity.this, "你选择了取消", 0).show();          }    });    builder.show();}public void click3(View v){    Builder builder = new AlertDialog.Builder(this);    //设置图标    builder.setIcon(android.R.drawable.ic_dialog_alert);    //设置标题    builder.setTitle("请选择");    final String[] items = new String[]{            "1",            "2",            "3",            "4",    };    //设置单选选项    builder.setSingleChoiceItems(items, 1, new OnClickListener() {        //dialog:触发此方法执行的那个对话框        @Override        public void onClick(DialogInterface dialog, int which) {            Toast.makeText(MainActivity.this, items[which], 0).show();            //对话框消失            dialog.dismiss();        }    });    //显示对话框    builder.show();}public void click4(View v){    //创建对话框创建器    AlertDialog.Builder builder = new Builder(this);    //设置图标    builder.setIcon(android.R.drawable.ic_dialog_alert);    //设置标题    builder.setTitle("请选择");    final String[] items = new String[]{            "1",            "2",            "3",            "4",            "5",            "6"    };    final boolean[] checkedItems = new boolean[]{            true,            false,            false,            false,            false,            true    };    //设置多选选项    builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() {        @Override        public void onClick(DialogInterface dialog, int which, boolean isChecked) {            //记录用户的选择            checkedItems[which] = isChecked;        }    });    builder.setPositiveButton("确定", new OnClickListener() {        @Override        public void onClick(DialogInterface dialog, int which) {            String text = "";            for (int i = 0; i < checkedItems.length; i++) {                text += checkedItems[i]? items[i] + "，": "";            }            Toast.makeText(MainActivity.this, text, 0).show();        }    });    builder.show();}public void click5(View v){    //创建进度条对话框    final ProgressDialog dialog = new ProgressDialog(this);    dialog.setTitle("正在加载中，请稍候...");    dialog.setMax(100);    dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);    Thread t = new Thread(){        public void run() {            for (int i = 0; i <= 100; i++) {                dialog.setProgress(i);                try {                    sleep(20);                } catch (InterruptedException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }            //进度消失            dialog.dismiss();        }    };    t.start();    dialog.show();} }

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