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Quit other activity in Google plus integration does not work

I follow this tutorial , it works fine, but in my application I have a lot of activity like SplashActivity → MainActivity → MyNewMainActivity

MyNewMainActivtiy.java contains 3 fragments, for example SearchFragment → NearFragment → ProfileFragment

I successfully complete the login and get profile information and set the name and image in profileFragment . I set the logout button where I want to log out of Google plus and back to LoginActivity and when I find the googleplus login button again, it shows an error

07-02 11:24:04.815: E/AndroidRuntime(24382): FATAL EXCEPTION: main 07-02 11:24:04.815: E/AndroidRuntime(24382): java.lang.NullPointerException 07-02 11:24:04.815: E/AndroidRuntime(24382): at com.rstm.doctorrx.LoginActivity.resolveSignInError(LoginActivity.java:279) 07-02 11:24:04.815: E/AndroidRuntime(24382): at com.rstm.doctorrx.LoginActivity.signInWithGplus(LoginActivity.java:345) 07-02 11:24:04.815: E/AndroidRuntime(24382): at com.rstm.doctorrx.LoginActivity.onClick(LoginActivity.java:114) 07-02 11:24:04.815: E/AndroidRuntime(24382): at android.view.View.performClick(View.java:4222) 07-02 11:24:04.815: E/AndroidRuntime(24382): at android.view.View$PerformClick.run(View.java:17343) 07-02 11:24:04.815: E/AndroidRuntime(24382): at android.os.Handler.handleCallback(Handler.java:615) 07-02 11:24:04.815: E/AndroidRuntime(24382): at android.os.Handler.dispatchMessage(Handler.java:92) 07-02 11:24:04.815: E/AndroidRuntime(24382): at android.os.Looper.loop(Looper.java:137) 07-02 11:24:04.815: E/AndroidRuntime(24382): at android.app.ActivityThread.main(ActivityThread.java:4895) 07-02 11:24:04.815: E/AndroidRuntime(24382): at java.lang.reflect.Method.invokeNative(Native Method) 07-02 11:24:04.815: E/AndroidRuntime(24382): at java.lang.reflect.Method.invoke(Method.java:511) 07-02 11:24:04.815: E/AndroidRuntime(24382): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994) 07-02 11:24:04.815: E/AndroidRuntime(24382): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761) 07-02 11:24:04.815: E/AndroidRuntime(24382): at dalvik.system.NativeStart.main(Native Method)

LoginActivity.java

 package com.rstm.doctorrx; import java.util.ArrayList; import org.json.JSONObject; import android.app.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.IntentSender.SendIntentException; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.widget.Button; import android.widget.ImageButton; import android.widget.Toast; import com.doctorrx.integration.FacebookService; import com.doctorrx.integration.FacebookService.FacebookFriendListRequester; import com.doctorrx.integration.UserContext; import com.doctorrx.integration.Utils; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.common.api.ResultCallback; import com.google.android.gms.common.api.Status; import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks; import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener; import com.google.android.gms.plus.Plus; import com.google.android.gms.plus.model.people.Person; public class LoginActivity extends Activity implements OnClickListener , FacebookFriendListRequester, ConnectionCallbacks, OnConnectionFailedListener{ /** * A flag indicating that a PendingIntent is in progress and prevents us * from starting further intents. */ public static int socialLogin; private boolean mIntentInProgress; private ConnectionResult mConnectionResult; ImageButton cross_btn; ProgressDialog dialog; Button login_btn, signup_btn,google_btn,facbook_login_btn; private boolean mSignInClicked; private static final int RC_SIGN_IN = 0; private SharedPreferences mPrefs; // Logcat tag private static final String TAG = "MainActivity"; // Google client to interact with Google API private static GoogleApiClient mGoogleApiClient; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_login); cross_btn=(ImageButton)findViewById(R.id.cross_btn); login_btn=(Button)findViewById(R.id.login_btn); signup_btn=(Button)findViewById(R.id.register_btn); google_btn=(Button)findViewById(R.id.google_login_btn); facbook_login_btn=(Button)findViewById(R.id.facbook_login_btn); initialiseGoogleclient(); facbook_login_btn.setOnClickListener(this); google_btn.setOnClickListener(this); login_btn.setOnClickListener(this); signup_btn.setOnClickListener(this); cross_btn.setOnClickListener(this); // try { // PackageInfo info = getPackageManager().getPackageInfo( // "com.rstm.doctorrx", PackageManager.GET_SIGNATURES); // for (Signature signature : info.signatures) { // MessageDigest md = MessageDigest.getInstance("SHA"); // md.update(signature.toByteArray()); // Log.e("MY KEY HASH:", // Base64.encodeToString(md.digest(), Base64.DEFAULT)); // } // } catch (NameNotFoundException e) { // // } catch (NoSuchAlgorithmException e) {} } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.facbook_login_btn: socialLogin=404; dialog = new ProgressDialog(this); loadMyFriendList(); break; case R.id.cross_btn: startActivity(new Intent(v.getContext(),MainActivity.class)); overridePendingTransition(R.anim.fade_in, R.anim.fade_out); finish(); break; case R.id.login_btn: startActivity(new Intent(v.getContext(),LoginDetailActivity.class)); overridePendingTransition( R.anim.slide_in_up, R.anim.slide_out_up ); break; case R.id.register_btn: startActivity(new Intent(v.getContext(),SignupActivity.class)); overridePendingTransition( R.anim.slide_in_up, R.anim.slide_out_up ); break; case R.id.google_login_btn: socialLogin=401; initialiseGoogleclient(); signInWithGplus(); break; } } private void initialiseGoogleclient() { // TODO Auto-generated method stub mGoogleApiClient = new GoogleApiClient.Builder(this) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this).addApi(Plus.API) .addScope(Plus.SCOPE_PLUS_LOGIN).build(); } private void loadMyFriendList() { // TODO Auto-generated method stub if (Utils.haveNetworkConnection(this)) { dialog.setMessage("Verifying credentials..."); dialog.show(); FacebookService.instance().setContext(getApplicationContext()); if (!Utils.isAuthenticated()) { FacebookService.instance().fetchFacebookProfile(this); } else { UserContext.authorized = true; startActivity(new Intent(this,MyNewMainActivity.class)); overridePendingTransition( R.anim.slide_in_left, R.anim.slide_out_left); dialog.dismiss(); finish(); } } } @Override public void onListFetched(ArrayList<JSONObject> onLinefriends, ArrayList<JSONObject> idleLinefriends, ArrayList<JSONObject> offLinefriends) { // TODO Auto-generated method stub //dialog.dismiss(); } @Override public void onFbError() { // TODO Auto-generated method stub dialog.dismiss(); } public void onFacebookProfileRetreived(boolean isSuccess) { // override this method if (isSuccess) { startActivity(new Intent(this,MyNewMainActivity.class)); overridePendingTransition( R.anim.slide_in_left, R.anim.slide_out_left); dialog.dismiss(); finish(); } else { Toast.makeText(this, "Some Error occurred!", Toast.LENGTH_LONG).show(); dialog.dismiss(); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // super.onActivityResult(requestCode, resultCode, data); super.onActivityResult(requestCode, resultCode, data); if(socialLogin==404){ if (!UserContext.authorized) { FacebookService.instance().authorizeCallback(requestCode, resultCode, data); UserContext.authorized = true; //dialog.dismiss(); } } if(socialLogin==401) { if (requestCode == RC_SIGN_IN) { if (resultCode != RESULT_OK) { mSignInClicked = false; } mIntentInProgress = false; if (!mGoogleApiClient.isConnecting()) { mGoogleApiClient.connect(); } } } } // public void onStart() { // super.onStart(); // if (!Utils.haveNetworkConnection(this)) { // showNoConnectionDialog(); // } // } private void showNoConnectionDialog() { AlertDialog.Builder alt_bld = new AlertDialog.Builder(this); alt_bld.setMessage("Error in Network Connection!").setCancelable(false) .setPositiveButton("OK", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { finish(); } }); AlertDialog alert = alt_bld.create(); alert.setTitle("Error!"); alert.setIcon(R.drawable.ic_launcher); alert.show(); } @Override public void onConnectionFailed(ConnectionResult result) { // TODO Auto-generated method stub if (!result.hasResolution()) { GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), this, 0).show(); return; } if (!mIntentInProgress) { // Store the ConnectionResult for later usage mConnectionResult = result; if (mSignInClicked) { // The user has already clicked 'sign-in' so we attempt to // resolve all // errors until the user is signed in, or they cancel. resolveSignInError(); } } } @Override public void onConnected(Bundle paramBundle) { // TODO Auto-generated method stub mSignInClicked = false; // Get user information getProfileInformation(); if(socialLogin==401){ startActivity(new Intent(this,MyNewMainActivity.class)); overridePendingTransition( R.anim.slide_in_left, R.anim.slide_out_left); finish();} } @Override public void onConnectionSuspended(int paramInt) { // TODO Auto-generated method stub mGoogleApiClient.connect(); } protected void onStart() { super.onStart(); mGoogleApiClient.connect(); } protected void onStop() { super.onStop(); if (mGoogleApiClient.isConnected()) { mGoogleApiClient.disconnect(); } } /** * Method to resolve any signin errors * */ private void resolveSignInError() { if (mConnectionResult.hasResolution()) { try { mIntentInProgress = true; mConnectionResult.startResolutionForResult(this, RC_SIGN_IN); } catch (SendIntentException e) { mIntentInProgress = false; mGoogleApiClient.connect(); } } } /** * Updating the UI, showing/hiding buttons and profile layout * */ /** * Fetching user information name, email, profile pic * */ private void getProfileInformation() { try { if (Plus.PeopleApi.getCurrentPerson(mGoogleApiClient) != null) { Person currentPerson = Plus.PeopleApi .getCurrentPerson(mGoogleApiClient); String personName = currentPerson.getDisplayName(); String personPhotoUrl = currentPerson.getImage().getUrl(); String personGooglePlusProfile = currentPerson.getUrl(); String email = Plus.AccountApi.getAccountName(mGoogleApiClient); Log.e(TAG, "Name: " + personName + ", plusProfile: " + personGooglePlusProfile + ", email: " + email + ", Image: " + personPhotoUrl); // by default the profile url gives 50x50 px image only // we can replace the value with whatever dimension we want by // replacing sz=X // personPhotoUrl = personPhotoUrl.substring(0, // personPhotoUrl.length() - 2); if(mPrefs == null){ mPrefs = this.getSharedPreferences("MyGamePreferences", android.content.Context.MODE_PRIVATE); } SharedPreferences.Editor editor = mPrefs.edit(); editor.putInt("login",401); editor.putString("Guser_name", personName); editor.putString("Guserpic_url", personPhotoUrl); editor.commit(); UserContext.MyPicUrl=personPhotoUrl; UserContext.MyDisplayName=personName; } else { Toast.makeText(getApplicationContext(), "Person information is null", Toast.LENGTH_LONG).show(); } } catch (Exception e) { e.printStackTrace(); } } /** * Sign-in into google * */ private void signInWithGplus() { if (!mGoogleApiClient.isConnecting()) { mSignInClicked = true; resolveSignInError(); } } /** * Sign-out from google * */ public static void signOutFromGplus() { if (mGoogleApiClient.isConnected()) { Plus.AccountApi.clearDefaultAccount(mGoogleApiClient); mGoogleApiClient.disconnect(); //mGoogleApiClient.connect(); } } /** * Revoking access from google * */ public 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(TAG, "User access revoked!"); mGoogleApiClient.connect(); } }); } } }

profileFragment

 public class ProfileFragment extends Fragment { SharedPreferences mPrefs; Button logout_btn; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.profile_layout, container, false); TextView name =(TextView)rootView.findViewById(R.id.my_name); ImageView myimage=(ImageView)rootView.findViewById(R.id.my_pic); logout_btn=(Button)rootView.findViewById(R.id.logout_btn); logout_btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Editor editor = mPrefs.edit(); // for Normal Login if(mPrefs.getInt("login", -404)==201) { editor.putString("normal_login_username", ""); editor.putInt("normallogin", -201); } // for Gmail if(mPrefs.getInt("login", -404)==401) { LoginActivity.signOutFromGplus(); LoginActivity.socialLogin=-10; editor.putInt("login", -401); } // for Facebook if(mPrefs.getInt("login", -404)==404) { new MyAsyncTask().execute(); editor.putInt("login", -404); } editor.commit(); Intent intent = new Intent(getActivity(),LoginActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(intent); getActivity().finish(); } }); if(mPrefs == null){ mPrefs = getActivity().getSharedPreferences("MyGamePreferences", android.content.Context.MODE_PRIVATE); } if(mPrefs.getInt("login", -401)==401){ name.setText(mPrefs.getString("Guser_name", "Dummy User")); Utils.loadImageFromUrl(myimage, mPrefs.getString("Guserpic_url", "nothing found")); } if(mPrefs.getInt("login", -404)==404) { name.setText(mPrefs.getString("display_name", "Dummy User")); Utils.loadImageFromUrl(myimage, mPrefs.getString("profile_url", "nothing found")); } if(mPrefs.getInt("login", -404)==201) { name.setText(mPrefs.getString("normal_login_username", "Dummy User")); } return rootView; } @Override public void onStart() { super.onStart(); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { // TODO Auto-generated method stub super.onCreateOptionsMenu(menu, inflater); menu.clear(); inflater.inflate(R.menu.activity_main_actions, menu); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } public class MyAsyncTask extends AsyncTask<Void, Void, Void>{ @Override protected Void doInBackground(Void... params) { // TODO Auto-generated method stub try { FacebookService.instance().signout(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } } }

My problem is how to exit another fragmnet / activity form from googleplus. Any idea would be appreciated.

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2 answers

There are two ways to solve this problem.

  • Initialize GooglePlusClient by creating a global application using the singleton class / initializing it in the application class.

  • Or you should initialize gplusclient in all actions (for this, write an abstract / base activity class with all gplus functions, such as sigin, signout, and extend this base class in all activities where you want to process gplus functions.

Another suggestion: handle the GplusClient object (e.g. logout / login) in activity instead of fragment. The logic for exchanging information between fragments / actions is as follows

  • Define the interface in your fragment
  • Implement this interface
  • Communicate through this interface (for example: if you have a button in a fragment, click the button, call the interface function, which is implemented by activity and processes it in action). Google site will help you (with examples)

For example (BaseActivity example)

 public class GplusBaseActivity extends Activity implements PlusClientFragment.OnSignedInListener { public static final int REQUEST_CODE_PLUS_CLIENT_FRAGMENT = 1550; public static final int REQUEST_CODE_PLUS_CLIENT_PICK = 1551; public static final int REQUEST_CODE_PLUS_CLIENT_API = 1552; private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000; private PlusClientFragment mGPlusSignInFragment; protected PlusClient mPlusClient; protected Context mContext; protected LoginHelper.GplusLoginCallback mOnGplusLoginCallback; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mContext = this; mGPlusSignInFragment = PlusClientFragment.getPlusClientFragment(this, MomentUtil.ACTIONS); } @Override public void setupActionBar(ActionBar actionBar) { } public Context getContext() { return this; } public Activity getActivity() { return this; } public void gplusLogin(LoginHelper.GplusLoginCallback gplusLoginCallback) { mOnGplusLoginCallback = gplusLoginCallback; mGPlusSignInFragment.signIn(REQUEST_CODE_PLUS_CLIENT_FRAGMENT); } @Override public void onSignedIn(PlusClient plusClient) { mPlusClient = plusClient; Person currentPerson = plusClient.getCurrentPerson(); // After signin code } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_CODE_PLUS_CLIENT_FRAGMENT) { Ld("onActivityResult: from G+,requestCode: " + requestCode + ", resultCode:" + resultCode); mGPlusSignInFragment.handleOnActivityResult(requestCode, resultCode, data); } } private boolean servicesConnected() { int resultCode = GooglePlayServicesUtil .isGooglePlayServicesAvailable(this); if (ConnectionResult.SUCCESS == resultCode) { //Ld("Google Play services is available."); return true; } else { Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog( resultCode, this, CONNECTION_FAILURE_RESOLUTION_REQUEST); if (errorDialog != null) { ErrorDialogFragment errorFragment = new ErrorDialogFragment(); errorFragment.setDialog(errorDialog); errorFragment.show(getSupportFragmentManager(), "Locations Updates"); } return false; } } public void showSelectAccountsUI() { try { Intent intent = AccountPicker .newChooseAccountIntent(null, null, new String[]{"com.google"}, true, null, null, null, null); startActivityForResult(intent, REQUEST_CODE_PLUS_CLIENT_PICK); } catch (ActivityNotFoundException e) { e.printStackTrace(); L.wrong(mContext); servicesConnected(); } } private static class ErrorDialogFragment extends DialogFragment { private Dialog mDialog; public ErrorDialogFragment() { super(); mDialog = null; } public void setDialog(Dialog dialog) { mDialog = dialog; } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { return mDialog; } } public void gplusLogout() { if (mPlusClient != null) { Ld("Loggin out G+"); plusSignOut(mPlusClient); } } private void plusSignOut(PlusClient plusClient) { if (plusClient.isConnected()) { plusClient.clearDefaultAccount(); plusClient.disconnect(); } } public void logout(View view) { gplusLogout(); } }

An example of a core activity with fragments:

Suppose you have a LogoutFragment where you want to exit g +

 public class LogoutFragment extends Fragment { LogoutFragmentListener mLogoutFragmentListener; public interface LogoutFragmentListener{ public void onLogoutBtnClick(); } Button mLogoutButton; // this is your sign-out btn @Override public void onAttach(Activity activity) { super.onAttach(activity); try{ mLogoutFragmentListener=(LogoutFragmentListener)activity; }catch (Exception e){ throw new IllegalStateException("Parent activity should implement LogoutFragmentListener"); } } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); mLogoutButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mLogoutFragmentListener.onLogoutBtnClick(); } }); } ... ... }

and your main activity

 public class MainActivity extends GplusBaseActivity implements LogoutFragment.LogoutFragmentListener { ... ... @Override public void onLogoutBtnClick(){ gplusLogout(); // method from super class } }
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I solved the problem by running ConnectionCallbacks and the OnConnectionFailedListener interface in my MyNewMainActivity.java , which contains all my fragments (search, neighbors and profile) and the call function from ProfileFragment , like this

 ((MyNewMainActivity)getActivity()).signOutFromGplus();
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Source: https://habr.com/ru/post/971639/

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