Android: Error calling GoogleApiClient.connect()
问题 When i call method mGoogleApiClient.connect() the app crashes. the following code is copied from www.developers.google.com i want to implement Google Sign In functionality, but unable to do so. i also have edited the build.gradle file. in my Last app i could not add Leaderboards just because of this issue, and now again my next app needs Leaderboards, but this time i can't leave it. import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.api.GoogleApiClient