活動未啓動

Question

我可以讓進度對話框停止，但TabbedView活動永遠不會啓動，只會進入黑屏。有任何想法嗎？

class DownloadWebPageTask extends AsyncTask<String, Void, String> { 
    private final ProgressDialog dialog = new ProgressDialog(MainScreen.this); 
    @Override 
     protected void onPreExecute() { 
      dialog.setMessage("Gathering data for\n"+selectedSportName+".\nPlease wait..."); 
      dialog.show(); 
     } 


    @Override 
    protected String doInBackground(String... urls) { 
     String response = ""; 
     updateMaps(); 
     return response; 
    } 



    @Override 
    protected void onPostExecute(String result) { 
     dialog.dismiss(); 
     startTabbedViewActivity(); 
    } 
} 


private void startTabbedViewActivity(){ 
    Intent intent = new Intent(this, TabbedView.class); 
    intent.putExtra(SPORT_NAME_EXTRA, selectedSportName); 
    intent.putExtra(HEADLINES_FOR_SPORT_EXTRA,   existingSportHeadlines.get(selectedSportName)); 
    intent.putExtra(SCORES_FOR_SPORT_EXTRA, existingSportScores.get(selectedSportName)); 
    intent.putExtra(SCHEDULE_FOR_SPORT_EXTRA, existingSportSchedule.get(selectedSportName)); 
    startActivity(intent); 
} 

我已經看過了Manifest文件，我沒有看到任何奇怪的東西。無法弄清楚這一點。

Answer 1

是活動的佈局導向正確

android:orientation="vertical" 

Answer 2

你忘所以根本沒有執行它添加@覆蓋上面的「onPostExecute」的方法。