Android_03_三种对话框

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MainActivity.java

package com.itheima.dialog;import android.os.Bundle;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.content.DialogInterface.OnMultiChoiceClickListener;import android.view.Menu;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);}//确定取消对话框public void click1(View v){AlertDialog.Builder builder = new Builder(this);//设置图标builder.setIcon(android.R.drawable.alert_dark_frame);//设置标题builder.setTitle("欲练此功必先自宫");//设置文本builder.setMessage("李志平，想清楚哦");//设置确定按钮builder.setPositiveButton("确定", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "感谢使用本软件,再见", 0).show();}});//设置取消按钮builder.setNegativeButton("取消", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "若不自宫,一定不成功", 0).show();}});//方法一：//使用创建器,生成一个对话框对象//AlertDialog ad = builder.create();//ad.show();//方法二：//也可以直接用builder的show()//一下两种对话框同理；builder.show();}//单选对话框public void click2(View v){AlertDialog.Builder builder = new Builder(this);builder.setTitle("请选择性别");final String[] items = new String[]{"男","女"};//关于setSingleChoiceItems()中的第二个参数，//-1表示默认都不选中，在本例中，0表示选中“男” ， 1表示选中“女”builder.setSingleChoiceItems(items, -1, new OnClickListener() {//which:用户所选的条目的下标//dialog:触发这个方法的对话框@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "您选择的是:" + items[which], 0).show();//关闭对话框dialog.dismiss();}});builder.show();}//多选对话框public void click3(View v){AlertDialog.Builder builder = new Builder(this);builder.setTitle("请选择您觉得帅的人");final String[] items = new String[]{"侃哥","赵帅哥","赵老师","赵师兄"};//表示对应默认的值final boolean[] checkedItems = new boolean[]{true,true,false,false};builder.setMultiChoiceItems(items, checkedItems, new OnMultiChoiceClickListener() {//which:用户点击的条目的下标//isChecked:用户是选中该条目还是取消该条目@Overridepublic void onClick(DialogInterface dialog, int which, boolean isChecked) {checkedItems[which] = isChecked;}});//设置一个确定按钮builder.setPositiveButton("确定", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {String text = "";for(int i = 0; i < 4; i++){text += checkedItems[i]? items[i] + "," : "";}Toast.makeText(MainActivity.this, text, 0).show();dialog.dismiss();}});builder.show();}}

activity_main.java

<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: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"     android:orientation="vertical"    >    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="确定取消对话框"         android:onClick="click1"        />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="单选对话框"         android:onClick="click2"        />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="多选对话框"         android:onClick="click3"        /></LinearLayout>

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