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這是我第一次在這裏發帖，因爲我從來沒有過的需求，因爲每一個問題，我有已經回答了！如何在Android應用程序關閉後打開我的Google plus會話？
的事情是，我試圖登錄我與谷歌Android應用程序加號，但如果我關閉我的應用程序..我不知道怎麼看，如果用戶在已經簽署了..有什麼辦法做檢查嗎？
例如： - 你登錄我的應用程序，然後你去在MainActivity而不是登錄活動。 - 那你不註銷，你只需關閉我的應用程序的..也許半小時.. - 在那之後..你再次打開我的應用程序，而是去在MainActivity再次..你在登錄活動再次..
有沒有辦法知道，如果你已經登錄？
這是我的登錄類：
import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.Scope;
import com.google.android.gms.plus.Plus;
public final class LoginGPlusFragment extends Fragment implements
View.OnClickListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener
{
/* Request code used to invoke sign in user interactions. */
private static final int RC_SIGN_IN = 0;
/**
* True if we are in the process of resolving a ConnectionResult
*/
private boolean mIntentInProgress;
/**
* True if the sign-in button was clicked. When true, we know to resolve all
* issues preventing sign-in without waiting.
*/
private boolean mSignInClicked;
static GoogleApiClient mGoogleApiClient;
SignInButton btnLogin;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
return inflater.inflate(R.layout.fragment_gplus_login, container, false);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState)
{
Log.d("DEBUG","onViewCreated LoginGPlusFragment");
super.onViewCreated(view, savedInstanceState);
if(mGoogleApiClient == null || !mGoogleApiClient.isConnected())
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(Plus.API)
.addScope(new Scope("profile"))
.build();
else
Log.d("DEBUG","onViewCreated you're already connected");
btnLogin = (SignInButton)view.findViewById(R.id.sign_in_button);
btnLogin.setOnClickListener(this);
}
@Override
public void onConnectionFailed(ConnectionResult result)
{
Log.d("DEBUG","onConnectionFailed LoginGPlusFragment");
if (!mIntentInProgress)
{
if (mSignInClicked && result.hasResolution())
{
// The user has already clicked 'sign-in' so we attempt to resolve all
// errors until the user is signed in, or they cancel.
try
{
result.startResolutionForResult(getActivity(), RC_SIGN_IN);
mIntentInProgress = true;
} catch (IntentSender.SendIntentException e) {
// The intent was canceled before it was sent. Return to the default
// state and attempt to connect to get an updated ConnectionResult.
mIntentInProgress = false;
mGoogleApiClient.connect();
}
}
}
}
@Override
public void onClick(View view)
{
if (view.getId() == R.id.sign_in_button && !mGoogleApiClient.isConnecting())
{
mSignInClicked = true;
mGoogleApiClient.connect();
}
}
@Override
public void onResume()
{
super.onResume();
Log.d("DEBUG","onResume LoginGPlusFragment");
if(mGoogleApiClient!=null && mGoogleApiClient.isConnected())
launchChatActivity();
else
Log.d("DEBUG","onResume you are disconnected");
}
@Override
public void onConnected(Bundle bundle)
{
Log.d("DEBUG","onConnected LoginGPlusFragment");
mSignInClicked = false;
launchChatActivity();
}
private void launchChatActivity()
{
String accountName = Plus.AccountApi.getAccountName(mGoogleApiClient);
Log.d("DEBUG", "Connected with google. You are "+accountName);
btnLogin.setVisibility(View.INVISIBLE);
Intent i = new Intent(getActivity(), ChatActivity.class);
startActivity(i);
getActivity().finish();
}
@Override
public void onConnectionSuspended(int i)
{
Log.d("DEBUG","onConnectionSuspended LoginGPlusFragment");
mGoogleApiClient.connect();
}
@Override
public void onActivityResult(int requestCode, int responseCode, Intent data)
{
super.onActivityResult(requestCode, responseCode, data);
Log.d("DEBUG","onActivityResult LoginGPlusFragment");
if (requestCode == RC_SIGN_IN)
{
if (responseCode != getActivity().RESULT_OK)
{
mSignInClicked = false;
}
mIntentInProgress = false;
if (!mGoogleApiClient.isConnected())
{
mGoogleApiClient.reconnect();
}
}
}
}
非常感謝您！