常用的Dialog有确认对话框，单选按钮对话框，多选按钮对话框，复选按钮对话框另外还有自定义的对话框

AlertDialog的常用方法

setTitle:为对话框设置标题

setMessage:为对话框设置内容

setIcon:为对话框设置图标

setItems设置对话框要显示的list

setMultiChoiceItems:一般用于复选框显示

setSingleChoiceItem:，设置单选按钮

setNeutralButton:普通按钮

setPositiveButton:添加确定按钮

setNegativeButton:添加取消按钮

setView:设置自定义样式

下面通过一个实例来了解这些方法

这是运行结果：

MainActivity.class

package com.example.alertdialog; import android.R.bool; import android.os.Bundle; import android.app.Activity; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.app.Dialog; import android.content.DialogInterface; import android.content.pm.LabeledIntent; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { private Button button1; private Button button2; private Button button3; private Button button4; private Button button5; private int mark=0; private String item[] = { "学生", "工人", "教师", "农民" }; private String multChoice[]={"旅游","电影","运动","读书"}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.btn_button1); button2 = (Button) findViewById(R.id.btn_button2); button3 = (Button) findViewById(R.id.btn_button3); button4 = (Button) findViewById(R.id.btn_button4); button5 = (Button) findViewById(R.id.btn_button5); button1.setOnClickListener(this); button2.setOnClickListener(this); button3.setOnClickListener(this); button4.setOnClickListener(this); button5.setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { //确认对话框 case R.id.btn_button1: { AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("确认对话框"); builder.setMessage("确认退出？"); builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "你单击了确定按钮", Toast.LENGTH_SHORT).show(); } }); builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "你单击了取消按钮", Toast.LENGTH_SHORT).show(); } }); builder.create(); builder.show(); break; } //列表对话框 case R.id.btn_button2: { AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("职业"); builder.setItems(item, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "你的职业是" + item[which], Toast.LENGTH_SHORT).show(); } }); builder.create(); builder.show(); break; } //多选对话框 case R.id.btn_button3: { final boolean choose[]=new boolean[multChoice.length]; AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("爱好"); builder.setMultiChoiceItems(multChoice, null, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { // TODO Auto-generated method stub choose[which]=isChecked; } }); builder.setPositiveButton("确认", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub String result=""; for(int i=0;i<multChoice.length;i++){ if(choose[i]){ result+=multChoice[i]+" "; } } Toast.makeText(MainActivity.this, "你的爱好["+result+"]", Toast.LENGTH_SHORT).show(); } }); builder.create(); builder.show(); break; } //单选对话框 case R.id.btn_button4: { mark=0; AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("职业"); builder.setSingleChoiceItems(item, 0, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub mark=which; } }); builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "你的职业:"+item[mark], Toast.LENGTH_SHORT).show(); } }); builder.create(); builder.show(); break; } //自定义对话框 case R.id.btn_button5: { LayoutInflater inflater=LayoutInflater.from(this); View view=inflater.inflate(R.layout.item, null); AlertDialog.Builder builder = new Builder(this); builder.setIcon(R.drawable.ic_launcher); builder.setTitle("自定义对话框"); builder.setView(view); builder.setNeutralButton("普通按钮", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this,"我是自定义的对话框哦",Toast.LENGTH_SHORT).show(); } }); builder.create(); builder.show(); break; } } } }

布局文件

activity_main.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" > <Button android:id="@+id/btn_button1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="确认对话框" /> <Button android:id="@+id/btn_button2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="列表对话框" /> <Button android:id="@+id/btn_button3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="多选对话框" /> <Button android:id="@+id/btn_button4" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="单选对话框" /> <Button android:id="@+id/btn_button5" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="自定义对话框" /> </LinearLayout> </RelativeLayout>

自定义的对话框布局文件

item.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="vertical" > <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:scaleType="fitCenter" android:src="@drawable/icon" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="我是自定义的对话框" /> </LinearLayout>

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