检查用户是否在使用谷歌帐户looged

Question

我正在制作一个Android应用程序，它提供使用谷歌登录。我已成功登录。现在，我想在下次打开应用程序时将用户直接带到仪表板。那么如何检查他是否已经使用Google帐户登录过。

Answer 1

使用silentSignIn如下所示从GoogleSignInApi。这很棒。并且还使用sharedPreference将状态保持为loggedIn或loggedOut。

@Override 
public void onStart() { 
    super.onStart(); 

    OptionalPendingResult<GoogleSignInResult> opr = Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient); 

    //If the user is signIn and cached or else try again logging 
    Log.d(TAG, "Got cached sign-in|| " + opr.isDone()); 

    if (opr.isDone() && BankerPrefs.isLogin(this)) { 
     GoogleSignInResult result = opr.get(); 
     handleSignInResult(result); 
    } 
} 

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 

    // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...); 
    if (requestCode == RC_SIGN_IN) { 
     GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data); 
     handleSignInResult(result); 
    } 
}