android:惯用的AlertDialog对话框及自定义对话框

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;		}		}	}}

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>

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>