アンドロイドの非UIスレッドからUIを更新するにはどうすればよいですか？

Question

私はAsynkTaskを実行するLogin Fragmentを持っており、onPost（）でLogin Fragment UIを更新したいと思っています。既にThatの修正が必要です。非UIスレッドを作成するにはどうしたらいいですか？

がここに私のコードです： - 。

@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    m_Main = inflater.inflate(R.layout.login_screen, container, false); 
    ((AppCompatActivity) getActivity()).getSupportActionBar().hide(); 
    CMainActivity.m_Drawer.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED); 
    m_oLoginSession = new CLoginSessionManagement(getActivity()); 
    init();// initialize controls 
    return m_Main; 
} 

public void init() { 
    m_MainLayout = (LinearLayout) m_Main.findViewById(R.id.mainLayout); 


    m_InputMobile = (EditText) m_Main.findViewById(R.id.input_mobile); 
    m_InputPassword = (EditText) m_Main.findViewById(R.id.input_password); 

    m_LoginBtn = (AppCompatButton) m_Main.findViewById(R.id.btn_Login); 
    m_ChangePass = (AppCompatButton) m_Main.findViewById(R.id.btn_ChangePass); 
    m_ChangePass.setBackgroundColor(Color.TRANSPARENT); 
    m_ChangePass.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.container, new CChangePasswordScreen()).commit(); 
     } 
    }); 

    m_RegisterBtn = (AppCompatButton) m_Main.findViewById(R.id.btn_Register); 

    m_RegisterBtn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.container, new CRegistrationScreen()).commit(); 
     } 
    }); 
    m_LoginBtn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      new LoginAttempt().execute(); 
     } 
    }); 
} 

private class LoginAttempt extends AsyncTask<String, Void, String> { 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(getActivity()); 
     pDialog.setCancelable(false); 
     pDialog.setProgressStyle(android.R.style.Widget_ProgressBar_Small); 
     // and now the magic 
     pDialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND); 
     pDialog.getWindow().setGravity(Gravity.BOTTOM); 
     pDialog.getWindow().getAttributes().verticalMargin = 0.5f; 
     pDialog.show(); 

// CProgressBar.getInstance（）showProgressBar（getActivity（）、 "ログイン中...お待ちください"）; //進捗状況を示す.... ...... }

@Override 
    protected String doInBackground(String... params) { 
     getLoginDetails();// getting login details from editText........... 
     InputStream inputStream = null; 
     m_oJsonsResponse = new CJsonsResponse(); 
     isFirstLogin = true; 
     try { 
      // 1. create HttpClient 
      HttpClient httpclient = new DefaultHttpClient(); 
      // 2. make POST request to the given URL 
      HttpPost httpPost = new HttpPost(s_szLoginUrl); 
      String json = ""; 
      // 3. build jsonObject 
      JSONObject jsonObject = new JSONObject(); 
      jsonObject.put("agentCode", s_szMobileNumber); 
      jsonObject.put("pin", s_szPassword); 
      jsonObject.put("firstloginflag", m_oLoginSession.isLogin()); 
      // 4. convert JSONObject to JSON to String 
      json = jsonObject.toString(); 
      // 5. set json to StringEntity 
      StringEntity se = new StringEntity(json); 
      // 6. set httpPost Entity 
      httpPost.setEntity(se); 
      // 7. Set some headers to inform server about the type of the content 
      // httpPost.setHeader("Accept", "application/json"); ///not required 
      httpPost.setHeader("Content-type", "application/json"); 
      // 8. Execute POST request to the given URL 
      HttpResponse httpResponse = httpclient.execute(httpPost); 
      HttpEntity entity = httpResponse.getEntity(); 
      // 9. receive response as inputStream 
      inputStream = entity.getContent(); 
      System.out.print("InputStream...." + inputStream.toString()); 
      System.out.print("Response...." + httpResponse.toString()); 

      StatusLine statusLine = httpResponse.getStatusLine(); 
      System.out.print("statusLine......" + statusLine.toString()); 
      ////Log.d("resp_body", resp_body.toString()); 
      int statusCode = statusLine.getStatusCode(); 
      if (statusCode == 200) { 
       // 10. convert inputstream to string 
       if (inputStream != null) { 
        s_szresult = m_oJsonsResponse.convertInputStreamToString(inputStream); 
        //String resp_body = 
        EntityUtils.toString(httpResponse.getEntity()); 
       } 
      } else 
       s_szresult = "Did not work!"; 

     } catch (Exception e) { 
      Log.d("InputStream", e.getLocalizedMessage()); 
     } 
     return s_szresult; 
    } 

    @Override 
    protected void onPostExecute(final String response) { 
     super.onPostExecute(response); 
     m_Handler = new Handler(); 
     new Thread(new Runnable() { 
      @Override 
      public void run() { 
       m_Handler.post(new Runnable() { 
        @Override 
        public void run() { 
         CProgressBar.getInstance().hideProgressBar();// hide progressbar after getting response from server...... 
         try { 
          m_oResponseobject = new JSONObject(response);// getting response from server 
          new Thread() {// making child thread... 
           public void run() { 
            Looper.prepare(); 
            try { 
             getResponse();// getting response from server ........ 
             Looper.loop(); 
            } catch (JSONException e) { 
             e.printStackTrace(); 
            } 
           } 
          }.start(); 

         } catch (JSONException e) { 
          e.printStackTrace(); 
         } 
        } 
       }); 
      } 
     }).start(); 
    } 

    public void getResponse() throws JSONException { 
     if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Transaction Successful")) { 
      m_oLoginSession.setLoginData(s_szResponseMobile, s_szResponsePassword); 
      getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.container, new CDealMainListing()).commit(); 
      CToastMessage.getInstance().showToast(getActivity(), "You are successfully Logged In"); 
     } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Agentcode Can Not Be Empty")) { 
      CToastMessage.getInstance().showToast(getActivity(), "Please Enter Valid Mobile Number"); 
     } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Pin Can Not Be Empty")) { 
      CToastMessage.getInstance().showToast(getActivity(), "Please Enter Password"); 
     } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Invalid PIN")) { 
      CToastMessage.getInstance().showToast(getActivity(), "Please enter correct Password"); 
     } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Subscriber/Agent Blocked due to Wrong Attempts")) { 
      CToastMessage.getInstance().showToast(getActivity(), "You are blocked as You finished your all attempt"); 
     } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Connection Not Available")) { 
      CToastMessage.getInstance().showToast(getActivity(), "Connection Lost ! Please Try Again"); 
     } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Subscriber/Agent Not Found")) { 
      CToastMessage.getInstance().showToast(getActivity(), "User not found ! Kindly Regiter before Login"); 
     } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("OTP not verify")) { 
      CToastMessage.getInstance().showToast(getActivity(), "Otp not Verify ! Kindly Generate Otp on Sign Up"); 
     } 
    } 

    public void getLoginDetails() { 
     s_szMobileNumber = m_InputMobile.getText().toString(); 
     s_szPassword = m_InputPassword.getText().toString(); 
    } 
} 

}

Answer 1

これは他のスレッドと番目に実行されているためdoInBackground()からonPostExecute()におけるスレッドであるコードを移動EMはonPostExecute()

であなたのモック例UIを更新する：あなたはAsynkTaskを使用している場合

@Override 
    protected String doInBackground(String... params) { 

     //RUN ALL THAT YOU WANT IN A DIFFERENT THREAD 
    } 

    @Override 
    protected void onPostExecute(final String response) { 
     //REFRESH THE UI 
     } 

Answer 2

を、あなたはUIスレッド上の両方が実行onPreExecuteとonPostExecute方法に挑戦してみることができます。

または、ハンドラを使用してUIを更新することができます。

Answer 3

In your UI thread create an object of Handler like this 

private Handler handler = new Handler() { 
     @Override 
     public void handleMessage(Message msg) { 

      //Update UI here 
      //use msg.obj if you have sent Object from background thread 
      //use msg.what if you have sent Integer from background thread 

      //Update UI if you have just trigger the handler using sendEmptyMessage(your UI/View gets data from Global Variable) 


     } 
}; 

Two ways we can trigger Hanler which is created in UI thread 
1)handler.sendMessage(Message); 
2)handler.sendEmptyMessage(0); 

    Inside on postExecute of your AsyncTask write below Code based on your requirement 
     //Message msg=Message.obtain(); 
     //msg.obj=YourObject;//If you want to pass Object 
     //msg.what=Integer;//If you want to pass Integer 

     //handler.sendMessage(msg);//to send Message objectdefined above 
     handler.sendEmptyMessage(0);//If you simply want to trigger