Android——進度對話方塊

標籤：

java類代碼：

 1 //普通進度對話方塊 2     public void bt8_onClick(View v) 3     { 4         final ProgressDialog progressDialog = new ProgressDialog(this); 5         progressDialog.setMessage("請等待……"); 6         progressDialog.setTitle("進度對話方塊"); 7         progressDialog.setCancelable(false); 8         progressDialog.show(); 9         //不要寫業務代碼10         //開啟子線程11         //實現多線程：1.繼承 2.實現介面12         //1.繼承Thread，重寫run方法，再調用start()方法13         new Thread(){14             @Override15             public void run() {   //{}內表示繼承16                 //業務代碼17                 try {18                     //延時 線程19                     Thread.sleep(3000);20                 }21                 catch (Exception e)22                 {23 24                 }25                 //執行完業務代碼26                 //關閉27                 progressDialog.dismiss();28             }29         }.start();//{}start負責啟動子線程，自動執行run()方法30     }31     //水平進度對話方塊32     public void bt9_onClick(View v)33     {34         final ProgressDialog progressDialog = new ProgressDialog(this);35         progressDialog.setTitle("水平進度對話方塊");36         progressDialog.setMessage("正在載入……");37         progressDialog.setCancelable(false);38         //設定成水平39         progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);40         progressDialog.show();41 42         final TextView tv_2 = (TextView)findViewById(R.id.tv_2);43 44         //啟動子線程  實習介面 Runnable，run()45         new Thread(new Runnable() {46             @Override47             public void run() {48                 //類比進度變化49                 for (int i = 0; i <=100; i++){50                 progressDialog.setProgress(i);51                 try {52                     //延時 線程53                     Thread.sleep(200);54                 }55                 catch (Exception e)56                 {57 58                 }59                 }60                 //在子線程裡訪問UI線程的View61                 runOnUiThread(new Runnable() {62                     @Override63                     public void run() {64 65                         tv_2.setText("下載完成");66                     }67                 });68                 progressDialog.dismiss();69             }70         }).start();71     }

注意開啟多線程的方法

附思維導圖：

Android——進度對話方塊