Android入门之ProgressDialog（纯Java）

Android入门之ProgressDialog（纯Java）

注意：

1、ProgressDialog.STYLE_SPINNER为圆形不确定进度条

2、ProgressDialog.STYLE_HORIZONTAL为条形进图条，当设置为可确定进度的进度条时，在调用show()函数之前设置进度无效，百分比始终为0。第二进度可设置，但是在show()之前设置没什么意义。不管是静态显示抑或是动态显示，都要在show()函数调用之后再操作。

1. import Android.app.Activity;  
2. import android.app.ProgressDialog;  
3. import android.os.Bundle;  
4. import android.view.View;  
5. import android.view.View.OnClickListener;  
6. import android.widget.*;  
7.   
8. public class ProgressDialogTest extends Activity {  
9.   
10.     private RelativeLayout mainView=null;  
11.     private Button button1=null;  
12.     private Button button2=null;  
13.     private ProgressDialog pd1=null;  
14.     private ProgressDialog pd2=null;  
15.       
16.     public void onCreate(Bundle savedInstanceState) {  
17.         super.onCreate(savedInstanceState);  
18.         mainView=new RelativeLayout(this);  
19.         button1=new Button(this);  
20.         RelativeLayout.LayoutParams lp1=new RelativeLayout.LayoutParams(-2,-2);  
21.         lp1.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);  
22.         lp1.addRule(RelativeLayout.ALIGN_PARENT_LEFT);  
23.         button1.setLayoutParams(lp1);  
24.         button1.setText("圆形进度条");  
25.         button1.setOnClickListener(new OnClickListener(){  
26.             public void onClick(View v) {  
27.                 if(pd1==null){  
28.                     pd1_init();  
29.                 }  
30.                 pd1.show();  
31.             }  
32.         });  
33.         mainView.addView(button1);  
34.         button2=new Button(this);  
35.         RelativeLayout.LayoutParams lp2=new RelativeLayout.LayoutParams(-2,-2);  
36.         lp2.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);  
37.         lp2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);  
38.         button2.setLayoutParams(lp2);  
39.         button2.setText("条形进度条");  
40.         button2.setOnClickListener(new OnClickListener(){  
41.             public void onClick(View v) {  
42.                 if(pd2==null){  
43.                     pd2_init();  
44.                 }  
45.                 pd2.show();  
46.                 pd2.setProgress(50);  
47.                 /*一种动态加载效果 
48.                 new Thread() {    
49.                     int progress=0;  
50.                     public void run() {    
51.                         try {    
52.                             while (progress <= 100) {    
53.                                 // 由线程来控制进度    
54.                                 pd2.setProgress(progress++);    
55.                                 Thread.sleep(100);    
56.                             }    
57.                             pd2.cancel();    
58.                         } catch (Exception e) {    
59.                             pd2.cancel();    
60.                         }    
61.                     }    
62.                 }.start();    
63.                 */  
64.             }  
65.         });  
66.         mainView.addView(button2);  
67.         setContentView(mainView);  
68.     }  
69.     /*pd1初始化*/  
70.     void pd1_init(){  
71.         pd1=new ProgressDialog(this);  
72.         pd1.setIcon(android.R.drawable.ic_menu_info_details);  
73.         pd1.setTitle("正在联网");  
74.         pd1.setProgressStyle(ProgressDialog.STYLE_SPINNER);  
75.         pd1.setMessage("请稍后……");  
76.     }  
77.     /*pd2初始化*/  
78.     void pd2_init(){  
79.         pd2=new ProgressDialog(this);  
80.         pd2.setIcon(android.R.drawable.sym_def_app_icon);  
81.         pd2.setTitle("正在下载软件");  
82.         pd2.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);  
83.         pd2.setIndeterminate(false);  
84.         pd2.setMessage("测试");  
85.         pd2.setMax(100);  
86.         //pd2.setProgress(50);   在show()之前设置该值无效，show()之前固定进度为0   
87.         //pd2.setSecondaryProgress(75);//在show()之前有效，但是意义不大   
88.     }  
89. }