Android初级教程三个Dialog对话框小案例

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() {
			
			@Override
			public 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() {
			
			@Override
			public 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
                       @Override
			public 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() {

					@Override
					public void onClick(DialogInterface dialog, int which,
							boolean isChecked) {
						checkedItems[which] = isChecked;

					}
				});

		builder.setPositiveButton("确定", new OnClickListener() {

			@Override
			public 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();
	}
}