Android学习之Dialog

在Android开发中，我们经常会需要在Android界面上弹出一些对话框，比如询问用户或者让用户选择。这些功能我们叫它Android Dialog对话框;

实例如下：

1.效果图：

2.XML代码：

 <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" >

     <Button
         android:id="@+id/button1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentLeft="true"
         android:layout_alignParentTop="true"
         android:text="信息提示框" />

     <Button
         android:id="@+id/button2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/button1"
         android:layout_below="@+id/button1"
         android:text="弹出单选按钮框" />

     <Button
         android:id="@+id/button3"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignRight="@+id/button2"
         android:layout_below="@+id/button2"
         android:text="弹出多选按钮框" />

     <Button
         android:id="@+id/button4"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/button3"
         android:layout_below="@+id/button3"
         android:text="弹出一组列表框" />

     <Button
         android:id="@+id/button5"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/button4"
         android:layout_below="@+id/button4"
         android:text="弹出进度条框" />

     <Button
         android:id="@+id/button6"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/button5"
         android:layout_below="@+id/button5"
         android:text="自定义布局框" />

 </RelativeLayout>

3.java代码：

 package com.example.alertdilog;

 import android.app.Activity;
 import android.app.Dialog;
 import android.app.AlertDialog;
 import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.Toast;

 import android.os.Bundle;

 public class MainActivity extends Activity implements OnClickListener {

     private Button Buttton1;
     private Button Buttton2;
     private Button Buttton3;
     private Button Buttton4;
     private Button Buttton5;
     private Button Buttton6;

     private EditText mUserNamEditText;
     private EditText mPwdEditText;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         initView();

     }

     private void initView() {
         Buttton1 = (Button) this.findViewById(R.id.button1);
         Buttton2 = (Button) this.findViewById(R.id.button2);
         Buttton3 = (Button) this.findViewById(R.id.button3);
         Buttton4 = (Button) this.findViewById(R.id.button4);
         Buttton5 = (Button) this.findViewById(R.id.button5);
         Buttton6 = (Button) this.findViewById(R.id.button6);

         Buttton1.setOnClickListener(this);
         Buttton2.setOnClickListener(this);
         Buttton3.setOnClickListener(this);
         Buttton4.setOnClickListener(this);
         Buttton5.setOnClickListener(this);
         Buttton6.setOnClickListener(this);
     }

     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
         getMenuInflater().inflate(R.menu.main, menu);
         return true;
     }

     @Override
     public void onClick(View view) {
         switch (view.getId()) {
         case R.id.button1: // 信息提示框
             AlertDialog();
             break;
         case R.id.button2:
             AlertRadioDialog(); // 弹出单选按钮
             break;
         case R.id.button3:
             AlertCheckBoxDialog();
             break;
         case R.id.button4:
             AlertListDialog();
             break;
         case R.id.button5:
             AlertProgressDialog();
             break;
         case R.id.button6:
             AlertziDialog();
             break;

         default:
             break;
         }
     }

     private void AlertziDialog() {
         // 动态加载布局生成View对象
         LayoutInflater layoutInflater = LayoutInflater.from(MainActivity.this);
         View view = layoutInflater.inflate(R.layout.login_alert, null);
         mUserNamEditText = (EditText) view.findViewById(R.id.edit_username);
         mPwdEditText = (EditText) view.findViewById(R.id.edit_password);

         AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
         builder.setTitle("登陆");
         builder.setIcon(R.drawable.ic_launcher).create();
         builder.setView(view);
         builder.setPositiveButton("确定", null);
         builder.setNegativeButton("取消", null);
         builder.show();
     }

     private void AlertListDialog() {
         // 指定下拉列表的显示数据
         final String[] cities = { "广州", "上海", "北京", "香港", "澳门", "深圳", "天津",
                 "武汉", "兰州", "长沙", "重庆", "西安", "成都", "安徽" };
         AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
         builder.setIcon(R.drawable.ic_launcher);
         builder.setTitle("选择一个城市");
         // 设置一个下拉的列表选择项
         builder.setItems(cities, new DialogInterface.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int which) {
                 Toast.makeText(MainActivity.this, "选择的城市为：" + cities[which],
                         Toast.LENGTH_SHORT).show();
             }
         });
         builder.show();
     }

     private void AlertRadioDialog() {
         final String[] sex = { "男", "女", "保密" };
         AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
         builder.setTitle("请选择性别");
         builder.setIcon(android.R.drawable.ic_dialog_info).create();
         builder.setSingleChoiceItems(sex, 0,
                 new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int which) {
                         Toast.makeText(MainActivity.this, "选择的是：" + sex[which],
                                 Toast.LENGTH_SHORT).show();
                         dialog.dismiss();
                     }
                 });
         builder.setNegativeButton("取消", null);
         builder.show();
     }

     private void AlertCheckBoxDialog() {
         AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
         builder.setTitle("请选择爱好");
         builder.setIcon(R.drawable.ic_launcher).create();
         builder.setMultiChoiceItems(new String[] { "打球", "谈朋友", "看小说", "写代码" },
                 null, null);
         builder.setPositiveButton("确定", null);
         builder.setNegativeButton("取消", null);
         builder.show();
     }

     private void AlertDialog() {
         AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
         builder.setTitle("信息提示");
         builder.setMessage("删除后不能回复，确认要删除吗？");
         builder.setIcon(R.drawable.ic_launcher).create();
         builder.setPositiveButton("确认", new AlertDialog.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int which) {
                 dialog.dismiss();
                 MainActivity.this.finish();
             }
         });
         builder.setNegativeButton("取消", new AlertDialog.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int which) {
                 dialog.dismiss();
             }
         });
         builder.show();
     }

     private void AlertProgressDialog() {
         ProgressDialog mypDialog = new ProgressDialog(MainActivity.this);
         // 设置ProgressDialog 标题
         mypDialog.setTitle("信息提示框");
         // 设置ProgressDialog 提示信息
         mypDialog.setMessage("Loading..........");
         // 设置ProgressDialog 标题图标
         mypDialog.setIcon(R.drawable.ic_launcher);
         // 设置ProgressDialog 进度条进度
         mypDialog.setProgress(59);
         // 设置ProgressDialog 的进度条是否不明确
         mypDialog.setIndeterminate(true);
         // 设置ProgressDialog 是否可以按退回按键取消
         mypDialog.setCancelable(true);
         // 显示出来来
         mypDialog.show();
     }

 }