Вызов метода не родительской активности из фрагмента

Question

У меня есть одна активность входа, в которой я использую Google. после успешного входа я перехожу на главный экран. который имеет навигационный ящик. теперь из списка фрагментов я хочу выйти из Google, используя один из фрагментов. как я могу это достичь. Ниже мой код:

LoginActivity.java

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

     // Session Manager 
     session = new SessionManager(getApplicationContext()); 
     initUi(); 
     setupListeners(); 


    } 

    protected void onStart() { 
     super.onStart(); 
    } 

    protected void onStop() { 
     super.onStop(); 
     if (MyApplication.mGoogleApiClient.isConnected()) { 
     MyApplication.mGoogleApiClient.disconnect(); 
    } 
    } 

    private void initUi(){ 
     llGoogle = (LinearLayout)findViewById(R.id.activity_login_llsignin_google); 
    } 

    private void setupListeners(){ 
     llGoogle.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       if (session.isConnected()) { 
        getProfileInformation(); 
       } else { 
       } 
      } 
     }); 
    } 

    private void resolveSignInError() { 
    if (MyApplication.mConnectionResult.hasResolution()) { 
     try { 
      mIntentInProgress = true; 
      MyApplication.mConnectionResult.startResolutionForResult(this, RC_SIGN_IN); 
     } catch (SendIntentException e) { 
      mIntentInProgress = false; 
      MyApplication.mGoogleApiClient.connect(); 
     } 
    } 
} 

private void googlePlusLogin() { 
    MyApplication.googlePlusLogin(); 
     resolveSignInError(); 
} 

MyApplication.java

public class MyApplication extends Application implements 
ConnectionCallbacks, OnConnectionFailedListener, 
ResultCallback<People.LoadPeopleResult>{ 

    public static Typeface app_medium; 
    public static Typeface app_regular; 
    public static Typeface app_bold; 

    public static final String TAG = MyApplication.class.getSimpleName(); 

    private static SharedPreferences Pref; 

    private static MyApplication mInstance; 

    private static final int RC_SIGN_IN = 0; 

    // Google client to communicate with Google 
    public static GoogleApiClient mGoogleApiClient; 
    public boolean mIntentInProgress; 
    public static boolean signedInUser; 
    public static ConnectionResult mConnectionResult; 

    @SuppressWarnings("unused") 
    public void onCreate() { 

     super.onCreate(); 

     mInstance = this; 

     mGoogleApiClient = new GoogleApiClient.Builder(this) 
     .addConnectionCallbacks(this) 
     .addOnConnectionFailedListener(this) 
     .addApi(Plus.API, Plus.PlusOptions.builder().build()) 
     .addScope(Plus.SCOPE_PLUS_LOGIN).build(); 

     Pref = PreferenceManager 
       .getDefaultSharedPreferences(getApplicationContext()); 


     checkFBKey(); 

     app_regular = Typeface.createFromAsset(getAssets(), 
       "fonts/dax_regular.ttf"); 

     app_medium = Typeface.createFromAsset(getAssets(), 
       "fonts/dax_medium.ttf"); 

     app_bold = Typeface.createFromAsset(getAssets(), 
       "fonts/dax_bold.ttf"); 

    } 

    public static synchronized MyApplication getInstance() { 
     return mInstance; 
    } 


    /** 
    * set user login 
    * */ 
// public static void setUserFBLogin() { 
//  // TODO Auto-generated method stub 
//  Editor edit_login_detail = Pref.edit(); 
//  edit_login_detail.putBoolean(GeneralClass.temp_iUserFaceBookBLOGIN, 
//    true); 
//  edit_login_detail.commit(); 
// } 



    public void checkFBKey() { 

     PackageInfo info; 
     try { 
      info = getPackageManager().getPackageInfo(getPackageName(), 
        PackageManager.GET_SIGNATURES); 
      for (Signature signature : info.signatures) { 
       MessageDigest md; 
       md = MessageDigest.getInstance("SHA"); 
       md.update(signature.toByteArray()); 
       String something = new String(Base64.encode(md.digest(), 0)); 
       // String something = new 
       // String(Base64.encodeBytes(md.digest())); 
       Log.e("hash key", something); 
      } 
     } catch (NameNotFoundException e1) { 
      Log.e("name not found", e1.toString()); 
     } catch (NoSuchAlgorithmException e) { 
      Log.e("no such an algorithm", e.toString()); 
     } catch (Exception e) { 
      Log.e("exception", e.toString()); 
     } 

    } 

    public static void googlePlusLogin() { 
     if (!mGoogleApiClient.isConnecting()) { 
      signedInUser = true; 
     } 
    } 

    public static void googlePlusLogout() { 
     if (mGoogleApiClient.isConnected()) { 
      Plus.AccountApi.clearDefaultAccount(mGoogleApiClient); 
      mGoogleApiClient.disconnect(); 
      mGoogleApiClient.connect(); 
//   updateProfile(false); 
     } 
    } 

    public static void revokeGplusAccess() { 
     if (mGoogleApiClient.isConnected()) { 
      Plus.AccountApi.clearDefaultAccount(mGoogleApiClient); 
      Plus.AccountApi.revokeAccessAndDisconnect(mGoogleApiClient) 
        .setResultCallback(new ResultCallback<Status>() { 
         @Override 
         public void onResult(Status arg0) { 
          Log.e("LOGIN", "User access revoked!"); 
          mGoogleApiClient.connect(); 
         } 

        }); 
     } 
    } 

    @Override 
    public void onLowMemory() { 
     // TODO Auto-generated method stub 
     super.onLowMemory(); 
    } 

    @Override 
    public void onResult(LoadPeopleResult arg0) { 
     // TODO Auto-generated method stub 

    } 

    @Override 
    public void onConnectionFailed(ConnectionResult arg0) { 
     // TODO Auto-generated method stub 
     if (!arg0.hasResolution()) { 
      return; 
     } 

     if (!mIntentInProgress) { 
      // store mConnectionResult 
      MyApplication.mConnectionResult = arg0; 

      if (signedInUser) { 
      } 
     } 
    } 

    @Override 
    public void onConnected(Bundle arg0) { 
     // TODO Auto-generated method stub 
     Log.e("APPLICATION", "CONNECTED"); 
    } 

    @Override 
    public void onConnectionSuspended(int arg0) { 
     // TODO Auto-generated method stub 
     mGoogleApiClient.connect(); 
    } 


} 

Теперь я хочу использовать метод googlePlusLogout() в моем фрагменте. Как мне это сделать.?

Answer 1

Вы должны реализовать все свои глобальные учетные данные и методы в классе Application, поэтому вы вызываете его из любого класса Activity или Fragment.

Declare Установите LoginActivity как CurrentActivity в классе приложений и использование instanceOf вызова loginSuccessful метод LoginActivity из приложения на onConnected() метода. и вы можете вызвать метод logOut из фрагмента класса Application.

Проверить Следуйте примеру.

/** 
* @author AA-Sk 
* 
*/ 
public class MyApplication extends Application { 

    private Activity mCurrentActivity; 

    @Override 
    public void onCreate() { 
     super.onCreate(); 
    } 

    @Override 
    public void onConnected(Bundle mBundle) { 
     Activity mActivity = getmCurrentActivity(); 
     if (mActivity != null) { 
      if (mActivity instanceof LoginActivity) { 
       LoginActivity mLoginActivity = (LoginActivity) mActivity; 
       mLoginActivity.loginSuccessfull(mBundle); 
      } 
     } 
    } 

    private void googleLogout() { 
    } 

    public void setmCurrentActivity(Activity mCurrentActivity) { 
     this.mCurrentActivity = mCurrentActivity; 
    } 

    public Activity getmCurrentActivity() { 
     return mCurrentActivity; 
    } 

    /** 
    * @author AA-Sk 
    * 
    */ 
    public class LoginActivity extends Activity { 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 
      ((MyApplication) getApplication()).setmCurrentActivity(LoginActivity.this); 
     } 

     private void loginSuccessfull(Bundle mBundle) { 
      // Store Data from bundle and call another activity as user is successfully logged in. 
     } 

    } 

    /** 
    * @author AA-Sk 
    * 
    */ 
    public class SampleActivity extends FragmentActivity { 

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

    } 

    /** 
    * @author AA-Sk 
    * 
    */ 
    public class logout extends Fragment { 

     @Override 
     public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
     } 

     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
      return super.onCreateView(inflater, container, savedInstanceState); 
     } 

     public logout() { 
      ((MyApplication) getActivity().getApplication()).googleLogout(); 
     } 

    } 

}