简单Dialog

简单Dialog对话框
思路：
1.建一个构造器Builder，一般使用AlertDialog.Builder
2.设置标题Title，图片Icon，等一些通用属性
3.若是一般的提示信息，使用setMessage方法直接设置显示的文本

builder.setMessage("是否确认退出？");

若是列表项，则：

//items是一个字符串数组，用来显示list的文本信息
builder.setItems(items, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
            //这里可以通过which来判断是哪一个选项被点击，实现点击事件
            }
        });

若是单选框，则：

//items是一个字符串数组，用来显示radio的文本信息，第二个参数为默认选中状态
builder.setSingleChoiceItems(items,0,new DialogInterface.OnClickListener() {  
            @Override  
            public void onClick(DialogInterface dialog, int which) {  
            }  
        });  

若是多选列表，则

final boolean selected[]={true,false,true}; 
//第二个参数为默认选中状态,boolean类型的数组
builder.setMultiChoiceItems(items,selected,new DialogInterface.OnMultiChoiceClickListener() {  
            @Override  
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {  
            }  
        });  

若是一个View，则

builder.setView(new EditText(this));

若是一个自定义布局文件，则

LayoutInflater layoutInflater = getLayoutInflater();
        View view = layoutInflater.inflate(R.layout.activity_main,null);
setView(view);

4.设置积极（右）/消极（左）/中立（中）按钮

builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
            }
        });
builder.setNegativeButton();        //消极
builder.setNeutralButton();         //中立

5.别忘了，还有创建和显示

builder.create().show();

OK，这样一个简单的dialog就创建完成了，下面是源代码:

package com.example.dialogdemo;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //生成dialog
        dialogLayout();
    }
    /** * 简单dialog */
    private void dialog1(){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);        //得到构造器, alert:警告；警觉
        builder.setTitle("警告");
        builder.setMessage("是否确认退出？");
        builder.setIconAttribute(R.drawable.ic_launcher);
        //设置是按钮，右边，positive：积极地；正确的
        builder.setPositiveButton("是", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();                           //关闭dialog
                Toast.makeText(MainActivity.this, "确认"+which, Toast.LENGTH_LONG).show();
            }
        });
        //设置否按钮，左边，Negative：消极的；否定的
        builder.setNegativeButton("否", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();
                Toast.makeText(MainActivity.this, "否", Toast.LENGTH_LONG);
            }
        });
        //设置取消按钮，中间，Neutral：中性的；中间的
        builder.setNeutralButton("取消", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();
                Toast.makeText(MainActivity.this, "取消", Toast.LENGTH_LONG).show();
            }
        });
        builder.create().show();                                //显示dialog
    }
    /** * 简洁的写法 */
    private void dialog1_1(){  
           //先new出一个监听器，设置好监听 
           DialogInterface.OnClickListener dialogOnclicListener=new DialogInterface.OnClickListener(){  

               @Override  
               public void onClick(DialogInterface dialog, int which) {  
                   switch(which){  
                       case Dialog.BUTTON_POSITIVE:  
                           Toast.makeText(MainActivity.this, "确认" + which, Toast.LENGTH_SHORT).show();  
                           break;  
                       case Dialog.BUTTON_NEGATIVE:  
                           Toast.makeText(MainActivity.this, "取消" + which, Toast.LENGTH_SHORT).show();  
                           break;  
                       case Dialog.BUTTON_NEUTRAL:  
                           Toast.makeText(MainActivity.this, "忽略" + which, Toast.LENGTH_SHORT).show();  
                           break;  
                   }  
               }  
           };  
           //dialog参数设置 
           AlertDialog.Builder builder=new AlertDialog.Builder(this);  //先得到构造器 
           builder.setTitle("提示"); //设置标题 
           builder.setMessage("是否确认退出?"); //设置内容 
           builder.setIcon(R.drawable.ic_launcher);//设置图标，图片id即可 
           builder.setPositiveButton("确认",dialogOnclicListener);  
           builder.setNegativeButton("取消", dialogOnclicListener);  
           builder.setNeutralButton("忽略", dialogOnclicListener);  
           builder.create().show();  
       }  
    /** * 列表对话框 */
    private void dialogList(){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);                            //先建构造器
        final String [] items = new String[] {"清蒸","红烧","爆炒"};                              //匿名内部类不能引用非final类型变量
        builder.setTitle("Tips");                                                   //设置标题
        builder.setIcon(R.drawable.ic_launcher);                            //设置图片
        //设置列表项
        builder.setItems(items, new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();
                Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_LONG).show();
            }
        });
        //设置确定按钮
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                dialog.dismiss();
                Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_LONG).show();
            }
        });
        builder.create().show();
    }
    /** * 单选对话框 */
    private void dialogSingle(){
        //一款超简单的没有监听器的单选框dialog
        new AlertDialog.Builder(this).setTitle("单选Dialog").setSingleChoiceItems(new String[]{"sada","retger","zklcxw"}, 0, null).setPositiveButton("yes", null).setNeutralButton("no", null).create().show();
    }
    /** * 复选对话框 */
    private void dialogMulti(){
        new AlertDialog.Builder(this).setTitle("复选").setIcon(R.drawable.ic_launcher).setMultiChoiceItems(new String[]{"篮球","足球","月球"}, new boolean[]{false,false,true}, null).setPositiveButton("yes", null).setNegativeButton("no", null).setNeutralButton("cancel", null).create().show();
    }
    /** * editText对话框 */
    private void dialogView(){
        new AlertDialog.Builder(this).setTitle("ViewDialog").setView(new EditText(this)).setPositiveButton("yes", null).setNeutralButton("no", null).create().show();;
    }
    /** * 自定义布局dialog */
    private void dialogLayout(){
        LayoutInflater layoutInflater = getLayoutInflater();
        View view = layoutInflater.inflate(R.layout.activity_main,null);
        new AlertDialog.Builder(this).setTitle("SelfDialog").setView(view).setPositiveButton("yes", null).setNeutralButton("no", null).create().show();;
    }
}