Kann nicht zur Hauptaktivität von login activty gehen (mit Hintergrundaufgabe)

Question

Ich mache eine App mit einer Login-Funktion, aber ich habe ein Problem, wo ich, wenn ich richtige Kontoinformationen, kann ich nicht zur Haupttätigkeit gehen scheint die Login-Aktivität wieder aufzunehmen:

Mein Background von Login activty:

@Override 
protected void onPostExecute(String json) { 
try { 
    progressDialog.dismiss(); 
    JSONObject jsonObject = new JSONObject(json); 
    JSONArray jsonArray = jsonObject.getJSONArray("server_response"); 
    JSONObject jo = jsonArray.getJSONObject(0); 
    String code = jo.getString("code"); 
    String message = jo.getString("message"); 
    if (code.equals("reg_true")){ 
     showDialog("Register succes", message, code); 
    } 
    else if (code.equals("reg_false")){ 
     showDialog("Register fail", message, code); 
    } 
    else if (code.equals("login_true")){ 
     Intent intent = new Intent(activity, MainActivity.class); 
     intent.putExtra("message", message); 
     activity.startActivity(intent); 

     //activity.finish(); // i tried with finish but i loose the itent extra i need for sharedpreference 
    } 

Login-Klasse:

public class LoginActivity extends AppCompatActivity { 
EditText Mail,Password; 
Button Login; 
TextView toRegister; 
AlertDialog.Builder builder; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_login); 

    Mail = (EditText) findViewById(R.id.lMail); 
    Password = (EditText) findViewById(R.id.lPassword); 
    Login = (Button) findViewById(R.id.bLogin); 
    toRegister = (TextView)findViewById(R.id.toRegister); 

    toRegister.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      startActivity(new Intent(LoginActivity.this, RegisterActivity.class)); 
     } 
    }); 

    Login.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      if (Mail.getText().toString().equals("") || Password.getText().toString().equals("")){ 
       builder = new AlertDialog.Builder(LoginActivity.this); 
       builder.setTitle("Attention"); 
       builder.setMessage("Rempliser tout les champs"); 
       builder.setPositiveButton("OK", new DialogInterface.OnClickListener() { 
        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         dialog.dismiss(); 

        } 
       }); 
       AlertDialog alertDialog = builder.create(); 
       alertDialog.show(); 
      } 
      else{ 
       BackgroundTask bt = new BackgroundTask(LoginActivity.this); 
       bt.execute("login" ,Mail.getText().toString(), Password.getText().toString()); 
      } 
     } 
    }); 
} 

@Override 
public void onBackPressed() { 
    // Disable going back to the MainActivity 
    moveTaskToBack(true); 
} 

}

Falls etwas fehlt, können Sie meine mainactivty und Manifest auf Kern finden: https://gist.github.com/anonymous/efc3400df01a0b972a71

bearbeiten: log hier:

03-28 20:40:01.539 954-4500/? I/ActivityManager: START u0 {cmp=com.serk.comparateurL3F1/.MainActivity (has extras)} from uid 10169 on display 0 
03-28 20:40:01.550 954-4500/? D/ActivityManager: finishRunningVoiceLocked() >>>> 
03-28 20:40:01.562 954-4007/? W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@b2323bc attribute=null, token = android.os.BinderProxy@2dc1afc 
03-28 20:40:01.600 24100-24100/? I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead. 
03-28 20:40:01.659 954-4500/? I/ActivityManager: START u0 {cmp=com.serk.comparateurL3F1/.LoginActivity} from uid 10169 on display 0 
03-28 20:40:01.665 954-4500/? D/ActivityManager: finishRunningVoiceLocked() >>>> 
03-28 20:40:01.704 954-3708/? D/WindowManager: relayoutVisibleWindow: Window{452fac1 u0 com.serk.comparateurL3F1/com.serk.comparateurL3F1.MainActivity EXITING} mAnimatingExit=true, mRemoveOnExit=false, mDestroying=false 
03-28 20:40:01.716 954-972/? I/WindowManager: Destroying surface Surface(name=Wait...) called by com.android.server.wm.WindowStateAnimator.destroySurface:1738 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:816 com.android.server.wm.WindowState.destroyOrSaveSurface:1906 com.android.server.wm.AppWindowToken.destroySurfaces:357 
03-28 20:40:01.742 24100-24100/? W/OpenGLRenderer: Points are too far apart 4.000001 
03-28 20:40:01.882 24100-24100/? I/TextInputLayout: EditText added is not a TextInputEditText. Please switch to using that class instead. 
03-28 20:40:01.884 24100-24100/? I/TextInputLayout: EditText added is not a TextInputEditText. Please switch to using that class instead. 
03-28 20:40:02.065 954-972/? I/ActivityManager: Displayed com.serk.comparateurL3F1/.LoginActivity: +379ms (total +499ms) 
03-28 20:40:02.097 3156-3156/? I/Keyboard.Facilitator: onFinishInput() 
03-28 20:40:02.098 3156-3156/? I/Keyboard.Facilitator: onStartInput() 
03-28 20:40:02.109 3156-3156/? I/LatinIME: Starting input. Cursor position = 0,0 
03-28 20:40:02.114 954-4003/? I/WindowManager: Destroying surface Surface(name=com.serk.comparateurL3F1/com.serk.comparateurL3F1.MainActivity) called by com.android.server.wm.WindowStateAnimator.destroySurface:1738 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:816 com.android.server.wm.WindowState.destroyOrSaveSurface:1906 com.android.server.wm.WindowManagerService.tryStartExitingAnimation:2830 
03-28 20:40:02.152 3918-13832/? D/PhoneInterfaceManager: [PhoneIntfMgr] getDataEnabled: subId=1 phoneId=0 
03-28 20:40:02.153 3918-13832/? D/PhoneInterfaceManager: [PhoneIntfMgr] getDataEnabled: subId=1 retVal=true 
03-28 20:40:02.153 3218-3617/? D/TelephonyManager: getDataEnabled: retVal=true 
03-28 20:40:02.167 3156-3156/? I/Keyboard.Facilitator: resetDictionaries() : no-op 
03-28 20:40:02.168 3156-3156/? I/StatsUtilsManager: onLoadSettings() 
03-28 20:40:02.436 954-4005/? I/WindowManager: Destroying surface Surface(name=com.serk.comparateurL3F1/com.serk.comparateurL3F1.LoginActivity) called by com.android.server.wm.WindowStateAnimator.destroySurface:1738 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:816 com.android.server.wm.WindowState.destroyOrSaveSurface:1906 com.android.server.wm.WindowManagerService.tryStartExitingAnimation:2830 

Answer 1

Betrachten Sie, was Sie am Ende auf MainActivity.onCreate(...) tun.

Intent intent = new Intent(this, LoginActivity.class); 
startActivity(intent); 

Du Neubelebung der LoginActivity selbst. Wenn Sie das nicht tun möchten, entfernen Sie die obigen Zeilen, damit weiterhin ordnungsgemäß geladen wird.

Answer 2

Ich bin mir nicht sicher, ob ich den Grund habe, aber könnten Sie überprüfen, ob Sie das brauchen .. In Zeile 82 und 83 in Ihrer Haupttätigkeit.

Intent intent = new Intent(this, LoginActivity.class);   
startActivity(intent);