Android - 與mainUi線程同步

並道歉如果這個問題之前被問到.. 我是新手到android ..我使用HttpClient從servlet獲取響應.. 和servlet給我答覆作爲JSON對象.. 和我讀這使用緩衝讀者..Android - 與mainUi線程同步

這個東西，我使用的AsyncTask

以下是代碼片段..

public void onClickButtonLogin() { 
    button_login.setOnClickListener(new View.OnClickListener() {@ 
     Override 
     public void onClick(View v) { 
      if (logInFor.equalsIgnoreCase("Driver")) { 
       if (!TextUtils.isEmpty(editText_userName.getText().toString().trim()) && !TextUtils.isEmpty(editText_userName.getText().toString().trim())) { 
        doCheckUserAuthentication(editText_userName.getText().toString(), editText_password.getText().toString()); 
        if (isUserAuthenticate) { 
         if (loggedInUser.getRollNo() == 2) { 
          Intent intent = new Intent(getApplicationContext(), TruckingMenuDriverActivity.class); 
          startActivity(intent); 
         } else { 
          Toast toast = Toast.makeText(context, "Invalid username/password", Toast.LENGTH_SHORT); 
          toast.show(); 
          editText_userName.setText(""); 
          editText_password.setText(""); 
         } 
        } else { 
         Toast toast = Toast.makeText(context, "Invalid username/password", Toast.LENGTH_SHORT); 
         toast.show(); 
         editText_userName.setText(""); 
         editText_password.setText(""); 
        } 
       } else { 
        Toast toast = Toast.makeText(context, "Invalid username/password", Toast.LENGTH_SHORT); 
        toast.show(); 
        editText_userName.setText(""); 
        editText_password.setText(""); 
       } 
      } 
     } 
    }); 
} 

public void doCheckUserAuthentication(String userName, String password) { 
    LoginTask task1 = new LoginTask(); 
    task1.execute(userName, password); 
    /*if(task1.getStatus() != AsyncTask.Status.FINISHED){ 
     try { 
      wait(); 
     } catch (InterruptedException e) { 
      e.printStackTrace(); 
     } 
    }*/ 
}

小號我試圖更新isUserAuthenticate變量onPostExecute但它不更新.. 如果我第一次嘗試tun和ture在第二..我認爲可能是它的線程syncronization問題..但我不知道熱做主UI線程等待單元AnyncTask線程。完成.. 所以請幫助我..what我需要做的..提前謝謝..

來源

2013-07-19 Shekhar Khairnar

的問題是你是不是等待的AsyncTask作爲AsyncTask的替代品，您還可以使用以下代碼片段。

final String uname = editText_userName.getText().toString() 
final String password = editText_password.getText().toString() 
new Thread() { 
    @Override 
    public void run() { 
     doCheckUserAuthentication(uname, password); 

     runOnUiThread(new Runnable() { 

      @Override 
      public void run() { 
       if (isUserAuthenticate) { 
        if (loggedInUser.getRollNo() == 2) { 
         Intent intent = new Intent(getApplicationContext(), TruckingMenuDriverActivity.class); 
         startActivity(intent); 
        } else { 
         Toast toast = Toast.makeText(context, "Invalid username/password", Toast.LENGTH_SHORT); 
         toast.show(); 
         editText_userName.setText(""); 
         editText_password.setText(""); 
        } 
       } else { 
        Toast toast = Toast.makeText(context, "Invalid username/password", Toast.LENGTH_SHORT); 
        toast.show(); 
        editText_userName.setText(""); 
        editText_password.setText(""); 
       } 

      } 
     }); 
    } 

}.start();

來源

2013-07-19 06:22:14

將

if(isUserAuthenticate){ 
          if(loggedInUser.getRollNo() == 2){ 
           Intent intent = new Intent(getApplicationContext(),TruckingMenuDriverActivity.class); 
           startActivity(intent); 
          }else{ 
           Toast toast = Toast.makeText(context, "Invalid username/password", Toast.LENGTH_SHORT); 
           toast.show(); 
           editText_userName.setText(""); 
           editText_password.setText(""); 
          } 
         }else{ 
          Toast toast = Toast.makeText(context, "Invalid username/password", Toast.LENGTH_SHORT); 
          toast.show(); 
          editText_userName.setText(""); 
          editText_password.setText(""); 


} 
...

內onPostExecute

來源

2013-07-19 06:15:54 mromer

Android - 與mainUi線程同步

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