Android 自定義progressDialog實現

我們在項目中經常會遇到這樣一個應用場景:執行某個耗時操作時,爲了安撫用戶等待的煩躁心情我們一般會使用進度條之類的空間,在android中讓大家最 容易想到的就是progressbar或者progressDialog,區別在於前者是一個控件,後者是對話框。由於一些需求在彈出進度條時不希望用戶 能夠操作其他控件,所以只能使用progressDialog,這個時候有遇到了一個問題,我不想要progressDialog的黑色框框,感覺這樣跟 應用的整體風格不協調,這個時候就考慮了寫一個自定義的progressDialog。
         在網上搜過很多自定義progressDialog的例子,對着寫了下,但是沒有任何效果,不知道是自己使用的方法不對還是什麼地方出錯了。通過不斷的查找資料,寫了一個簡單的自定義progressDialog。先上圖看下效果:

Android 自定義progressDialog實現

1.String.xml 文件,progressDialog是繼承與Dialog,先設置一下progressDialog的風格,設置背景透明色。
01 <style name="CustomDialog" parent="@android:style/Theme.Dialog">  
02     <item name="android:windowFrame">@null</item>  
03         <item name="android:windowIsFloating">true</item>  
04         <item name="android:windowContentOverlay">@null</item>  
05         <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>  
06         <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>  
07     </style>  
08         
09     <style name="CustomProgressDialog" parent="@style/CustomDialog">  
10         <item name="android:windowBackground">@android:color/transparent</item>  
11         <item name="android:windowNoTitle">true</item>  
12     </style>
2.customprogressdialog.xml文件,定義自己的佈局,由於我的需求只需要一個進度條以及一串顯示的內容,所以佈局比較接單
01 <?xml version="1.0" encoding="utf-8"?>  
02 <LinearLayout  
03   xmlns:android="http://schemas.android.com/apk/res/android"  
04   android:layout_width="fill_parent"  
05   android:layout_height="fill_parent"  
06   android:orientation="horizontal">  
07     <ImageView  
08         android:id="@+id/loadingImageView"  
09         android:layout_width="wrap_content"  
10         android:layout_height="wrap_content"  
11         android:background="@anim/progress_round"/>  
12     <TextView  
13         android:id="@+id/id_tv_loadingmsg"  
14         android:layout_width="wrap_content"  
15         android:layout_height="wrap_content"  
16         android:layout_gravity="center_vertical"  
17         android:textSize="20dp"/>  
18 </LinearLayout>
3.progress_round.xml文件.這個文件爲了實現轉動的效果,循環顯示這些圖片。
01 <?xml version="1.0" encoding="utf-8"?>  
02 <animation-list  
03     xmlns:android="http://schemas.android.com/apk/res/android"  
04     android:oneshot="false">  
05     <item android:drawable="@drawable/progress_1" android:duration="200"/>  
06     <item android:drawable="@drawable/progress_2" android:duration="200"/>  
07     <item android:drawable="@drawable/progress_3" android:duration="200"/>  
08     <item android:drawable="@drawable/progress_4" android:duration="200"/>  
09     <item android:drawable="@drawable/progress_5" android:duration="200"/>  
10     <item android:drawable="@drawable/progress_6" android:duration="200"/>  
11     <item android:drawable="@drawable/progress_7" android:duration="200"/>  
12     <item android:drawable="@drawable/progress_8" android:duration="200"/>  
13 </animation-list>
4.CustomProgressDialog.java文件,這個是就是我們最終需要使用的progressDialog了。
01 /**************************************************************************************
02 * [Project]
03 *       MyProgressDialog
04 * [Package]
05 *       com.lxd.widgets
06 * [FileName]
07 *       CustomProgressDialog.java
08 * [Copyright]
09 *       Copyright 2012 LXD All Rights Reserved.
10 * [History]
11 *       Version          Date              Author                        Record
12 *--------------------------------------------------------------------------------------
13 *       1.0.0           2012-4-27         lxd ([email protected])        Create
14 **************************************************************************************/
15       
16 package com.lxd.widgets;
17   
18   
19 import com.lxd.activity.R;
20   
21 import android.app.Dialog;
22 import android.content.Context;
23 import android.graphics.drawable.AnimationDrawable;
24 import android.view.Gravity;
25 import android.widget.ImageView;
26 import android.widget.TextView;
27   
28   
29 /********************************************************************
30  * [Summary]
31  *       TODO 請在此處簡要描述此類所實現的功能。因爲這項註釋主要是爲了在IDE環境中生成tip幫助,務必簡明扼要
32  * [Remarks]
33  *       TODO 請在此處詳細描述類的功能、調用方法、注意事項、以及與其它類的關係.
34  *******************************************************************/
35   
36 public class CustomProgressDialog extends Dialog {
37     private Context context = null;
38     private static CustomProgressDialog customProgressDialog = null;
39       
40     public CustomProgressDialog(Context context){
41         super(context);
42         this.context = context;
43     }
44       
45     public CustomProgressDialog(Context context, int theme) {
46         super(context, theme);
47     }
48       
49     public static CustomProgressDialog createDialog(Context context){
50         customProgressDialog = new CustomProgressDialog(context,R.style.CustomProgressDialog);
51         customProgressDialog.setContentView(R.layout.customprogressdialog);
52         customProgressDialog.getWindow().getAttributes().gravity = Gravity.CENTER;
53           
54         return customProgressDialog;
55     }
56    
57     public void onWindowFocusChanged(boolean hasFocus){
58           
59         if (customProgressDialog == null){
60             return;
61         }
62           
63         ImageView imageView = (ImageView) customProgressDialog.findViewById(R.id.loadingImageView);
64         AnimationDrawable animationDrawable = (AnimationDrawable) imageView.getBackground();
65         animationDrawable.start();
66     }
67    
68     /**
69      
70      * [Summary]
71      *       setTitile 標題
72      * @param strTitle
73      * @return
74      *
75      */
76     public CustomProgressDialog setTitile(String strTitle){
77         return customProgressDialog;
78     }
79       
80     /**
81      
82      * [Summary]
83      *       setMessage 提示內容
84      * @param strMessage
85      * @return
86      *
87      */
88     public CustomProgressDialog setMessage(String strMessage){
89         TextView tvMsg = (TextView)customProgressDialog.findViewById(R.id.id_tv_loadingmsg);
90           
91         if (tvMsg != null){
92             tvMsg.setText(strMessage);
93         }
94           
95         return customProgressDialog;
96     }
97 }
5.接下來就是寫一個測試activity調用我們的progressDialog了。
01 package com.lxd.activity;
02   
03 import com.lxd.widgets.CustomProgressDialog;
04   
05 import android.app.Activity;
06 import android.os.AsyncTask;
07 import android.os.Bundle;
08 import android.view.Window;
09 import android.view.WindowManager;
10   
11 public class MainFrame extends Activity {
12     private MainFrameTask mMainFrameTask = null;
13     private CustomProgressDialog progressDialog = null;
14       
15     @Override
16     public void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         this.requestWindowFeature(Window.FEATURE_NO_TITLE);
19         this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
20         WindowManager.LayoutParams.FLAG_FULLSCREEN);
21           
22         setContentView(R.layout.main);
23           
24         mMainFrameTask = new MainFrameTask(this);
25         mMainFrameTask.execute();
26     }
27       
28     @Override
29     protected void onDestroy() {
30         stopProgressDialog();
31           
32         if (mMainFrameTask != null && !mMainFrameTask.isCancelled()){
33             mMainFrameTask.cancel(true);
34         }
35           
36         super.onDestroy();
37     }
38   
39     private void startProgressDialog(){
40         if (progressDialog == null){
41             progressDialog = CustomProgressDialog.createDialog(this);
42             progressDialog.setMessage("正在加載中...");
43         }
44           
45         progressDialog.show();
46     }
47       
48     private void stopProgressDialog(){
49         if (progressDialog != null){
50             progressDialog.dismiss();
51             progressDialog = null;
52         }
53     }
54       
55     public class MainFrameTask extends AsyncTask<Integer, String, Integer>{
56         private MainFrame mainFrame = null;
57           
58         public MainFrameTask(MainFrame mainFrame){
59             this.mainFrame = mainFrame;
60         }
61           
62         @Override
63         protected void onCancelled() {
64             stopProgressDialog();
65             super.onCancelled();
66         }
67   
68         @Override
69         protected Integer doInBackground(Integer... params) {
70               
71             try {
72                 Thread.sleep(10 * 1000);
73             } catch (InterruptedException e) {
74                 e.printStackTrace();
75             }
76             return null;
77         }
78               
79         @Override
80         protected void onPreExecute() {
81             startProgressDialog();
82         }
83   
84         @Override
85         protected void onPostExecute(Integer result) {
86             stopProgressDialog();
87         }
88               
89           
90           
91     }
92 }
這樣我們需要的progressDialog效果就出來了
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