Android初级教程三个Dialog对话框小案例

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这里把三个对话框形式写在一个项目程序里面，用三个按钮控制显示什么样式的对话框。

先看布局文件代码：

<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"    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="click"/>        <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>

配置文件和之前写的配置方式一样。

看MainActivity总的代码：

package com.example.dialog;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.os.Bundle;import android.view.View;import android.widget.Toast;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }//这里是确定取消对话框    public void click(View v){    AlertDialog.Builder dialog = new AlertDialog.Builder(this);    dialog.setIcon(android.R.drawable.alert_dark_frame);    dialog.setTitle("欲练此功必先自宫");    dialog.setCancelable(false);    dialog.setMessage("东方教主，一统江湖！");    //设置确定按钮    dialog.setPositiveButton("确定", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "感谢使用，再见", 0).show();}});    //设置取消按钮    dialog.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();}});    //让对话框显示    dialog.show();    }    //设置单选    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"    };    builder.setSingleChoiceItems(items, -1, new OnClickListener() {//which：用户所选条目下标                         //dialog：出发这个方法的该对话框实例对象                       @Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "您的选择是："+items[which], 0).show();dialog.dismiss();}});        builder.show();    }        //设置多选对话框    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",    "找帅哥",    "杨道龙",    "小杨" };                //设置选中第几个选项final boolean[] checkedItems = new boolean[] { true, true, false, false };builder.setMultiChoiceItems(items, checkedItems,new OnMultiChoiceClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which,boolean isChecked) {checkedItems[which] = isChecked;}});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] + "," : "";//吐丝显示选中选项}Toast.makeText(MainActivity.this, text, 0).show();dialog.dismiss();}});builder.show();}}

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