android-view.ViewRootImpl $ CalledFromWrongThreadException

我試圖從Web服務獲取用戶名和用戶ID，我試圖改變他的價值取決於價值我從服務器獲得它，當我嘗試更改textview的onCreate函數外部值我有這樣的錯誤：

android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

Profile.java

public class Profile extends Activity { 

    TextView mymoUserName; 
    TextView mymoID; 

    @SuppressLint("NewApi") 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 

     setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);  

     setContentView(R.layout.profile); 

     getActionBar().hide(); 

     mymoUserName = (TextView)findViewById(R.id.profMymoUserName); 
     mymoID = (TextView)findViewById(R.id.profMymoID); 

     getUserInfo(); 

    } 

    protected void getUserInfo() 
    { 
     Thread t = new Thread() { 

      public void run() { 
       Looper.prepare(); 
       HttpClient client = new DefaultHttpClient(); 
       HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); 
       HttpResponse response; 

       String URL = "MY_URL"; 

       try { 
         HttpPost post = new HttpPost(URL); 

         List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3); 
         nameValuePairs.add(new BasicNameValuePair("section", "API")); 

         post.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

         response = client.execute(post); 

         if(response!=null) 
         { 
          String res = EntityUtils.toString(response.getEntity()); 
          JSONObject result = new JSONObject(res); 

          Toast.makeText(getBaseContext(), res , Toast.LENGTH_LONG).show(); 

          String username = result.getString("username"); 
          mymoUserName.setText(username); 

          String mymoId = result.getString("mymo_id"); 
          mymoID.setText(mymoId); 

         } 

       } catch(Exception e) { 
        e.printStackTrace(); 
        Toast.makeText(getBaseContext(), e.toString(), Toast.LENGTH_LONG).show(); 
       } 

       Looper.loop(); 
      } 
     }; 

     t.start();  
    } 

    @Override 
    public void onBackPressed() 
    { 
     finish(); 
    }

來源

2014-05-02 Abutouq

這是半自我說明的。和[搜索]（http://stackoverflow.com/search?q=%5Bandroid%5D+CalledFromWrongThreadException）給你休息。 – keyser

可能重複的[CalledFromWrongThreadException]（http://stackoverflow.com/questions/3413544/calledfromwrongthreadexception） – keyser

您從一個線程更新UI。你應該只從ui線程更新ui

Toast.makeText(getBaseContext(), res , Toast.LENGTH_LONG).show(); 
mymoUserName.setText(username); 
mymoID.setText(mymoId);

必須在ui線程中。可以使用runOnUiThread。

runOnUiThread(new Runnable() { 
@Override 
public void run() { 
     String res = EntityUtils.toString(response.getEntity()); 
     JSONObject result = new JSONObject(res); 
     Toast.makeText(getBaseContext(), res , Toast.LENGTH_LONG).show(); 

     String username = result.getString("username"); 
     mymoUserName.setText(username); 

     String mymoId = result.getString("mymo_id"); 
     mymoID.setText(mymoId); 

} 
});

但是您應該考慮使用AsyncTask。您可以在doInBackground更新UI onPreExecute，onPostExecute和onProgressUpdate

來源

2014-05-02 11:57:42 Raghunandan

對不起，但我是新的Android可以解釋更多:( – Abutouq

@Abutouq我應該擴展哪個主題 – Raghunandan

我是如何應該使用runOnUiThread我應該刪除表單我的代碼！ – Abutouq

您只能通過Android的UI線程訪問UI做你的後臺操作。在runOnUiThread中添加UI訪問語句，如下所示。

runOnUiThread(new Runnable() { 

     @Override 
     public void run() { 
      Toast.makeText(getBaseContext(), res , Toast.LENGTH_LONG).show(); 

      String username = result.getString("username"); 
      mymoUserName.setText(username); 

      String mymoId = result.getString("mymo_id"); 
      mymoID.setText(mymoId); 
     } 
    });

來源

2014-05-02 12:01:40 Mayur

android-view.ViewRootImpl $ CalledFromWrongThreadException

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