Android更新内部对话框中的TextView runOnUiThread

Question

我花了几个小时试图更新对话框中的文本视图，但失败了。

当单击该选项时，会显示新的对话框，并且在对话框中有文字和按钮，当我单击按钮时，textview将被更新。

这里是与按钮的onClick监听器代码：

start.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 
       for (int i = 0; i < 50 ; i ++){ 

        final String currentNum = String.valueOf(i + 1); 

        Thread t = new Thread() { 
          @Override 
          public void run() { 
          runOnUiThread(new Runnable() { 
           @Override 
           public void run() { 
            try { 
            Thread.sleep(1000); 
           } catch (InterruptedException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
           } 
            System.out.println(currentNum); //it is fine 
            currentNum.setText(currentNum); //it is the problem, the setText only work when the for loop is finished. 
           } 
          }); 
          } 
         }; 

         t.start(); 

       } 
      } 
     }); 

请让我知道如果你需要更多的信息。提前感谢！

//这是一个optionmenu

case R.id.action_refresh: 
    final TextView currentNum; 
    final ImageButton start; 

    String currentNum = Integer.toString(songList.size()); 

    final Dialog lyricsAnalysis = new Dialog(this,R.style.cust_dialog); 
    lyricsAnalysis.requestWindowFeature(Window.FEATURE_NO_TITLE); 
    lyricsAnalysis.setContentView(R.layout.analysis); 
    lyricsAnalysis.setCancelable(true); //back button to cancel 
    lyricsAnalysis.setCanceledOnTouchOutside(true); 


    start = (ImageButton) lyricsAnalysis.findViewById(R.id.start); 

    //first value 
    currentNum.setText(String.valueOf(currentNum)); 

    start.setOnClickListener(new OnClickListener() { 


     @Override 
     public void onClick(View arg0) { 
      for (int i = 0; i < 50 ; i ++){ 

       try { 
        Thread.sleep(1000); 
       } catch (InterruptedException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 

       updateTextView(lyricsAnalysis,i); 

      } 
     } 
    });  
    lyricsAnalysis.show(); 
    lyricsAnalysis.getWindow().setLayout(600, 1000); 
    break; 
} 
return super.onOptionsItemSelected(item); } 
public void updateTextView(Dialog dialog, int i) { 
    final TextView currentNum = (TextView) dialog.findViewById(R.id.currentNum); 
    currentNum.setText(Stri`enter code here`ng.valueOf(i)); 
    //return; 
} 

Answer 1

尝试此方法。这可能会帮助你。这是为我工作。（但我不是在对话框中使用）

public void updateTextView(String toThis) { 

    TextView textView = (TextView) findViewById(R.id.textView); 
    textView.setText(toThis); 

    //return; 
} 

Answer 2

尝试这样

int elapsedtime=0; 
    boolean isTimerRunning=false; 

Timer timerr; 

里面的onCreate

public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
    //declare your textview here; 
    timerr=new Timer(); 
       startTimer(); 
} 

    /* 
    * timer for displaying message bubble 
    */ 
    protected static void startTimer() { 
     isTimerRunning = true; 
     elapsedtime = 0; 
     // recordingseek.setProgress(0); 

     timerr.scheduleAtFixedRate(new TimerTask() { 
      public void run() { 

       // increase every sec 

elapsedtime++; 


        mmHandler.obtainMessage(1).sendToTarget(); 
        System.out.println("recording time" + elapsedtime); 

       if(elapsedtime==50) 
         timerr.cancel(); 


      } 
     }, 1000, 2000); 
    }; 

    public static Handler mmHandler = new Handler() { 

     public void handleMessage(Message msg) { 



      textview.setText(elapsedtime); 



} 
    }; 




    } 
};