Google+ sign out from a different activity

Question

I have started using the Google+ API for android, and I have created a sign-in application following this tutorial:

https://developers.google.com/+/mobile/android/sign-in

Now, the problem is that I want to create the sign out button from a different Activity, and what i tried to do didn't really worked..

My GPlusLogin code (Activity for the Google+ Login):

import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.content.IntentSender.SendIntentException; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import com.google.android.gms.common.*; import com.google.android.gms.common.GooglePlayServicesClient.ConnectionCallbacks; import com.google.android.gms.common.GooglePlayServicesClient.OnConnectionFailedListener; import com.google.android.gms.plus.PlusClient;  public class GPlusLogin extends Activity implements ConnectionCallbacks, OnConnectionFailedListener{      private static final int REQUEST_CODE_RESOLVE_ERR = 9000;     private static final String TAG = "GPlusLogin";      private ProgressDialog mConnectionProgressDialog;     private PlusClient mPlusClient;     private ConnectionResult mConnectionResult;      @Override     protected void onCreate(Bundle savedInstanceState) {         // TODO Auto-generated method stub         super.onCreate(savedInstanceState);         setContentView(R.layout.gplus_layout);         mPlusClient = new PlusClient.Builder(this, this, this).setVisibleActivities("http://schemas.google.com/AddActivity", "http://schemas.google.com/BuyActivity").build();         Bundle extras = getIntent().getExtras();         mConnectionProgressDialog = new ProgressDialog(this);         mConnectionProgressDialog.setMessage("Signing in...");          if(extras!=null){             if(extras.getString("signout")!=null){                 if (mPlusClient.isConnected()) {                     mPlusClient.clearDefaultAccount();                     mPlusClient.disconnect();                     mPlusClient.connect();                     finish();                     startActivity(getIntent());                 }             }         }else{              findViewById(R.id.sign_in_button).setOnClickListener(new OnClickListener() {                  public void onClick(View view) {                     // TODO Auto-generated method stub                     if (view.getId() == R.id.sign_in_button && !mPlusClient.isConnected()) {                         if (mConnectionResult == null) {                             mConnectionProgressDialog.show();                         } else {                             try {                                 mConnectionResult.startResolutionForResult(GPlusLogin.this, REQUEST_CODE_RESOLVE_ERR);                             } catch (SendIntentException e) {                                 // Try connecting again.                                 mConnectionResult = null;                                 mPlusClient.connect();                             }                         }                     }                 }             });         }     }      @Override     protected void onStart() {         // TODO Auto-generated method stub         super.onStart();         mPlusClient.connect();     }      @Override     protected void onStop() {         // TODO Auto-generated method stub         super.onStop();         mPlusClient.disconnect();     }      @Override     public void onConnectionFailed(ConnectionResult result) {         // TODO Auto-generated method stub         if (mConnectionProgressDialog.isShowing()) {             // The user clicked the sign-in button already. Start to resolve             // connection errors. Wait until onConnected() to dismiss the             // connection dialog.             if (result.hasResolution()) {                 try {                     result.startResolutionForResult(this, REQUEST_CODE_RESOLVE_ERR);                 } catch (SendIntentException e) {                     mPlusClient.connect();                 }             }         }          mConnectionResult = result;     }      @Override     protected void onActivityResult(int requestCode, int responseCode, Intent intent) {         if (requestCode == REQUEST_CODE_RESOLVE_ERR && responseCode == RESULT_OK) {             mConnectionResult = null;             mPlusClient.connect();         }     }      @Override     public void onConnected() {         // TODO Auto-generated method stub         mConnectionProgressDialog.dismiss();         Intent main = new Intent(GPlusLogin.this, MainActivity.class);         main.putExtra("result", true);         startActivity(main);     }      @Override     public void onDisconnected() {         // TODO Auto-generated method stub         Log.d(TAG, "disconnected");     }  } 

My Disconnect code on MainActivity:

import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView;   public class MainActivity extends Activity{      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         Bundle extras = getIntent().getExtras();         if(extras==null){             Intent intent = new Intent(this, GPlusLogin.class);             startActivity(intent);         }         TextView text1 = (TextView) findViewById(R.id.text1);         text1.setText("You Are Connected :D");          Button SignOut = (Button) findViewById(R.id.sign_out_gplus);         SignOut.setOnClickListener(new OnClickListener() {              @Override             public void onClick(View view) {                 // TODO Auto-generated method stub                 Intent intent = new Intent(MainActivity.this, GPlusLogin.class);                 intent.putExtra("signout", true);                 startActivity(intent);             }         });     }      @Override     public boolean onCreateOptionsMenu(Menu menu) {         // Inflate the menu; this adds items to the action bar if it is present.         getMenuInflater().inflate(R.menu.main, menu);         return true;     }   } 

Answer 1

Just add this on your new activity, where you want your logout-button for google+ to be there :

@Override protected void onStart() {     GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)             .requestEmail()             .build();     mGoogleApiClient = new GoogleApiClient.Builder(this)             .addApi(Auth.GOOGLE_SIGN_IN_API, gso)             .build();     mGoogleApiClient.connect();     super.onStart(); } 

and next:

 signout.setOnClickListener(new View.OnClickListener() {       @Override       public void onClick(View v) {           Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(                   new ResultCallback<Status>() {                       @Override                       public void onResult(Status status) {                           // ...                           Toast.makeText(getApplicationContext(),"Logged Out",Toast.LENGTH_SHORT).show();                           Intent i=new Intent(getApplicationContext(),MainActivity.class);                           startActivity(i);                       }                   });       }   });