更新片段后台线程中的TextView（UI线程）

Question

我试图用I值更新文本视图，因为它在后台线程中循环访问循环。我已经看过其他答案并尝试了几种方法，但没有更新。任何意见，我在做什么错误表示赞赏。

这是我最新的尝试：

 new Thread(){ 
      public void run(){ 
       // Start the detailed search of channels 
       YoutubeChannelInfoConnector yc = new YoutubeChannelInfoConnector(getActivity()); 
       channelinfosearchResults = yc.search(chanelIdToSearchStringBuilder.toString()); 

       handler.post(new Runnable(){ 
        public void run(){ 

           // Add the new influencers to the database 
           for (int i = 0; i < youtubeCompleteArraylistOfChannelsSearchedInDetail.size(); i++){ 

            final int finalI = i; 
            getActivity().runOnUiThread(new Runnable() { 
             public void run() { 
              String addedInt = String.valueOf(finalI); 
              newRecordsAddedToDatabaseTextView.setText(addedInt); 
             } 
            }); 

            Log.d("Database","record added " + i); 
           } 

           Toast.makeText(getActivity(), "Database Updated", Toast.LENGTH_SHORT).show(); 
           loadingview.setVisibility(View.GONE); 




          } else { 

           // continue in the detailed search of channels 
           searchYoutubeChannels(channelsToAdd); 
          } 
         } else { 
          Toast.makeText(getActivity(), "ERROR: THE SEARCH RETURNED NO RESULTS!", Toast.LENGTH_LONG).show(); 
         } 

        } 
       }); 
      } 
     }.start(); 
    } 

这可能不会让绝对意义上的，因为我不得不削减这么多行，使其有可能在计算器阅读。

基本上是：

我有新的线程，该线程我有一个可运行的，其运行的for循环如下的处理程序：

// Add the new influencers to the database 
           for (int i = 0; i < youtubeCompleteArraylistOfChannelsSearchedInDetail.size(); i++){ 

            final int finalI = i; 
            getActivity().runOnUiThread(new Runnable() { 
             public void run() { 
              String addedInt = String.valueOf(finalI); 
              newRecordsAddedToDatabaseTextView.setText(addedInt); 
             } 
            }); 

            Log.d("Database","record added " + i); 
           } 

我使用getActivity.runonUI，因为它是在一个片段运行。那 可能是代码运行的原因，但仍不能更新TextView？

UPDATE：

我也试过下面的代码用新的处理程序，但没有工作，要么：提前

final int finalI = i; 
            new Handler().post(new Runnable() { 
             @Override 
             public void run() { 
              String addedInt = String.valueOf(finalI); 
              newRecordsAddedToDatabaseTextView.setText(addedInt); 
             } 
            }); 

感谢您的帮助

Answer 1

做这样的

Handler handler=new Handler(); 
    handler.postDelayed(new Runnable() { 
     @Override 
     public void run() { 

      // Add the new influencers to the database 
      for (int i = 0; i < 100; i++){ 
       String addedInt = String.valueOf(i); 
       Log.e("data",addedInt); 
       view.setText(addedInt); 
       Toast.makeText(MainActivity.this, "Database Updated", Toast.LENGTH_SHORT).show(); 

     } 

     } 
    },2000); 

Answer 2

做这样的事情;

Handler handler=new Handler(Looper.getMainLooper()); 
     handler.postDelayed(new Runnable() { 
      @Override 
      public void run() { 

       // Add the new influencers to the database 
       for (int i = 0; i < 100; i++){ 
        String addedInt = String.valueOf(i); 
        Log.e("data",addedInt); 
        view.setText(addedInt); 
        Toast.makeText(MainActivity.this, "Database Updated", Toast.LENGTH_SHORT).show(); 

      } 

      } 
     },2000); 

Answer 3

使用此：

public class Data extends AsyncTask<Void,Void,String> { 
    @Override 
    protected String doInBackground(Void... params) { 
     Handler handler=new Handler(Looper.getMainLooper()); 
     handler.postDelayed(new Runnable() { 
      @Override 
      public void run() { 

       // Add the new influencers to the database 
       for (int i = 0; i < 100; i++){ 
        String addedInt = String.valueOf(i); 
        Log.e("data",addedInt); 
        view.setText(addedInt); 
        Toast.makeText(MainActivity.this, "Database Updated", Toast.LENGTH_SHORT).show(); 

       } 

      } 
     },2000); 

     return txt; 
    } 
}