@Override
public void onStart() {
super.onStart();
OptionalPendingResult<GoogleSignInResult> opr =
Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient);
if (opr.isDone()) {
// If the user's cached credentials are valid, the OptionalPendingResult will be "done"
// and the GoogleSignInResult will be available instantly.
Log.d(TAG, "Got cached sign-in");
GoogleSignInResult result = opr.get();
handleSignInResult(result);
} else {
// If the user has not previously signed in on this device or the sign-in has expired,
// this asynchronous branch will attempt to sign in the user silently. Cross-device
// single sign-on will occur in this branch.
showProgressDialog();
opr.setResultCallback(
new ResultCallback<GoogleSignInResult>() {
@Override
public void onResult(GoogleSignInResult googleSignInResult) {
hideProgressDialog();
handleSignInResult(googleSignInResult);
}
});
}
}
@Override
public void onResume() {
super.onResume();
OptionalPendingResult<GoogleSignInResult> opr =
Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient);
if (opr.isDone()) {
GoogleSignInResult result = opr.get();
handleSignInResult(result);
showShortenBox(true);
showSignInButton(false);
} else {
opr.setResultCallback(
new ResultCallback<GoogleSignInResult>() {
@Override
public void onResult(GoogleSignInResult googleSignInResult) {
showSignInButton(true);
showShortenBox(false);
}
});
}
}