Android——简易进度条

 1 public class MainActivity extends Activity {
 2 
 3 
 4     
 5     private ProgressDialog progressDialog;
 6 
 7     // ............
 8 
 9     /**
10      * 显示进度对话框
11      */
12     private void showProgressDialog() {
13         if (progressDialog == null) {
14             progressDialog = new ProgressDialog(this);
15             progressDialog.setMessage("正在加载...");
16             progressDialog.setCanceledOnTouchOutside(false);
17         }
18         progressDialog.show();
19     }
20     
21     /**
22      * 关闭进度对话框
23      */
24     private void closeProgressDialog() {
25         if (progressDialog != null) {
26             progressDialog.dismiss();
27         }
28     }
29     
30 
31 }