android學習：對話方塊(Dialog)

使用AlerDialog建立對話方塊需要瞭解以下幾個方法：

setTitle()：給對話方塊設定title

setIcon()：給對話方塊設定表徵圖

setMessage()：設定對話方塊的提示資訊

setItems()：設定對話方塊要顯示的一個list，一般用於顯示幾個命令時

setSingleChoiceItems()：設定對話方塊顯示一個單選的List

setMultiChoiceItems()：用來設定對話方塊顯示一系列的複選框

setPositiveButton()：給對話方塊添加“YES”按鈕

setNegativeButton()：給對話方塊添加“NO”按鈕

MainActivity.java

package com.example.examples_04_14;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.app.ProgressDialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;public class MainActivity extends Activity {ProgressDialog m_Dialog;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Dialog dialog = new AlertDialog.Builder(MainActivity.this).setTitle("登陸提示")//設定標題.setMessage("這裡需要登入！")//設定內容.setPositiveButton("確定",//設定確定按鈕new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton){//點擊“確定”轉向登陸框LayoutInflater factory = LayoutInflater.from(MainActivity.this);//得到自訂對話方塊                final View DialogView = factory.inflate(R.layout.dialog, null);                //建立對話方塊                AlertDialog dlg = new AlertDialog.Builder(MainActivity.this)                .setTitle("登入框")                .setView(DialogView)//設定自訂對話方塊的樣式                .setPositiveButton("確定", //設定"確定"按鈕                new DialogInterface.OnClickListener() //設定事件監聽                {                    public void onClick(DialogInterface dialog, int whichButton)                     {                    //輸入完成後，點擊“確定”開始登陸                    m_Dialog = ProgressDialog.show                                   (                                 MainActivity.this,                                     "請等待...",                                     "正在為你登入...",                                      true                                   );                                                new Thread()                        {                           public void run()                          {                             try                            {                               sleep(3000);                            }                            catch (Exception e)                            {                              e.printStackTrace();                            }                            finally                            {                            //登入結束，取消m_Dialog對話方塊                            m_Dialog.dismiss();                            }                          }                        }.start();                     }                })                .setNegativeButton("取消", //設定“取消”按鈕                new DialogInterface.OnClickListener()                 {                    public void onClick(DialogInterface dialog, int whichButton)                    {                    //點擊"取消"按鈕之後退出程式                    MainActivity.this.finish();                    }                })                .create();//建立                dlg.show();//顯示}}).setNeutralButton("退出", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton){//點擊"退出"按鈕之後推出程式MainActivity.this.finish();}}).create();//建立按鈕// 顯示對話方塊dialog.show();}}

/layout/dialog.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="vertical">    <TextView        android:id="@+id/username1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="20dp"        android:layout_marginRight="20dp"        android:text="帳號"         android:gravity="left"        android:textAppearance="?android:attr/textAppearanceMedium"/>    <EditText         android:id="@+id/username2"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_marginLeft="20dp"        android:layout_marginRight="20dp"        android:scrollHorizontally="true"        android:autoText="false"        android:capitalize="none"        android:gravity="fill_horizontal"        android:textAppearance="?android:attr/textAppearanceMedium"/>        <TextView         android:id="@+id/passwd1"        android:layout_height="wrap_content"        android:layout_width="wrap_content"        android:layout_marginLeft="20dp"        android:layout_marginRight="20dp"        android:text="密碼"        android:gravity="left"        android:textAppearance="?android:attr/textAppearanceMedium"/>    <EditText         android:id="@+id/passwd2"        android:layout_height="wrap_content"        android:layout_width="fill_parent"        android:layout_marginLeft="20dp"        android:layout_marginRight="20dp"        android:scrollHorizontally="true"        android:autoText="false"        android:capitalize="none"        android:gravity="fill_horizontal"        android:password="true"        android:textAppearance="?android:attr/textAppearanceMedium"/>    </LinearLayout>