在做手機(jī)開(kāi)發(fā)時(shí)，經(jīng)常碰到一些比較耗時(shí)的操作，這個(gè)時(shí)候進(jìn)度條就開(kāi)始派上用場(chǎng)了。
這個(gè)demo展示了ProgressBar進(jìn)度條和ProgressDialog進(jìn)度框。
一、ProgressDialog進(jìn)度框，效果如圖所示：

代碼如下：

復(fù)制代碼代碼如下:

//進(jìn)度對(duì)話(huà)框按鈕監(jiān)聽(tīng)
     class ProssButtonListener implements OnClickListener {
         @Override
         public void onClick(View v) {
             myDialog = ProgressDialog.show(ProgressbarDemo.this, "進(jìn)度條標(biāo)題",
                     "進(jìn)度條內(nèi)容", true);

             new Thread() {
                 public void run() {
                     try {
                         /* 在這里寫(xiě)上要背景運(yùn)行的程序片段 */
                         /* 為了明顯看見(jiàn)效果，以暫停3秒作為示范 */
                         sleep(3000);
                     } catch (Exception e) {
                         e.printStackTrace();
                     } finally {
                         // 卸載所創(chuàng)建的myDialog對(duì)象。
                         myDialog.dismiss();
                     }
                 }
             }.start(); /* 開(kāi)始運(yùn)行運(yùn)行線(xiàn)程 */
         }
     }

二、進(jìn)度條對(duì)話(huà)框，這里用兩種情況來(lái)動(dòng)態(tài)顯示進(jìn)度條刻度
1、handle方法
效果圖如下：

代碼如下：

復(fù)制代碼代碼如下:

//進(jìn)度條handle按鈕監(jiān)聽(tīng)
     class ProssBarHandleButtonListener implements OnClickListener {
         @Override
         public void onClick(View v) {
             progressBarHandle.setVisibility(View.VISIBLE);
             myProssBarhandleText.setVisibility(View.VISIBLE);
             progressBarHandle.setMax(1000); 
             new Thread() { 
                 public void run() {
                     for(int i=0;i<=1000;){
                     try {
                         /* 在這里寫(xiě)上運(yùn)行的進(jìn)度條 */
                         Message msg = new Message();
                         msg.what = 1;
                         msg.getData().putInt("size", i);
                         handler.sendMessage(msg);//handle發(fā)送消息
                         /* 為了明顯看見(jiàn)效果，以暫停1秒作為示范 */
                         sleep(100);
                         i+=10;
                     } catch (Exception e) {
                         handler.obtainMessage(-1).sendToTarget();
                         e.printStackTrace();
                     }  
                 }
                 }
             }.start(); /* 開(kāi)始運(yùn)行運(yùn)行線(xiàn)程 */
         }
     }

     //handle接收消息
      private Handler handler = new Handler(){

             @Override
             public void handleMessage(Message msg) {            
                 switch (msg.what) {
                 case 1:                
                     progressBarHandle.setProgress(msg.getData().getInt("size"));
                     float num = (float)progressBarHandle.getProgress()/(float)progressBarHandle.getMax();
                     int result = (int)(num*100);
                     System.out.println("progressBarHandle.getProgress()======="+progressBarHandle.getProgress());
                     myProssBarhandleText.setText(result+ "%");
                     if(progressBarHandle.getProgress()==progressBarHandle.getMax()){
                         Toast.makeText(ProgressbarDemo.this, "下載成功", 1).show();
                         progressBarHandle.setVisibility(View.GONE);
                         myProssBarhandleText.setVisibility(View.GONE);
                     }
                     break;

                 case -1:
                     Toast.makeText(ProgressbarDemo.this,"下載失敗", 1).show();
                     break;
                 }
             }
         };

2、使用AsyncTask方法，效果圖與handle效果一樣
具體代碼如下：

復(fù)制代碼代碼如下:

//進(jìn)度條synctask按鈕監(jiān)聽(tīng)
     class ProssBarSyncButtonListener implements OnClickListener {
         @Override
         public void onClick(View v) {
              new AsyncLoader().execute((Void)null);  
         }
     }

       
      //AsyncTask 任務(wù)執(zhí)行
     class AsyncLoader extends AsyncTask<Void, Integer, Integer> {
         @Override
 //         在doInBackground方法執(zhí)行前執(zhí)行
         protected void onPreExecute(){
             progressBarHandle.setVisibility(View.VISIBLE); 
             myProssBarhandleText.setVisibility(View.VISIBLE);
             progressBarHandle.setMax(100000);
         }

 //        做具體的耗時(shí)操作
         protected Integer doInBackground(Void... params) {
             //這里以1萬(wàn)的進(jìn)度條刻度來(lái)顯示
             int totalSize = 100000;
             for (int i = 0; i < 100000; ) { 
                 publishProgress(i);  //通過(guò)推送消息傳遞數(shù)據(jù)給onProgressUpdate方法執(zhí)行
                 i+=10;
             }
             return totalSize;
         }
 //        在doInBackground方法執(zhí)行過(guò)程中執(zhí)行
         protected void onProgressUpdate(Integer... progress) {
             progressBarHandle.setProgress(progress[0]);  
             float num = (float)progressBarHandle.getProgress()/(float)progressBarHandle.getMax();
             int result = (int)(num*100);
              myProssBarhandleText.setText(result+ "%");
         }

 //        在doInBackground方法結(jié)束后執(zhí)行
         protected void onPostExecute(Integer result) {
             Toast.makeText(ProgressbarDemo.this, "下載成功，下載了"+result, 1).show(); 
             myProssBarhandleText.setVisibility(View.GONE);
             progressBarHandle.setVisibility(View.GONE);
         }
     }