通过GoogleApiClient调用注销时出现非法状态异常 [英] Illegal state exception while calling signout through GoogleApiClient

问题描述

我想实施一个Google登录活动，一旦成功，该活动将打开我的下一个活动.如果用户从下一个活动中注销，我想回到Google登录活动并退出.但是，当我在onActivityResult中调用登出时，出现以下异常

I wanted to implement a Google signin activity which on success opens my next activity. If the user logs out from the next activity, I want to go back to Google signin activity and signout. However when I call signout in onActivityResult I get the following exception

Caused by: java.lang.IllegalStateException: GoogleApiClient is not connected yet.

这是相关代码

public class LoginActivity extends AppCompatActivity implements
    GoogleApiClient.OnConnectionFailedListener,
    View.OnClickListener {

private static final String TAG = "LoginActivity";
private static final int RC_SIGN_IN = 9001;

private GoogleApiClient mGoogleApiClient;
private GoogleSignInOptions gso;
private TextView mStatusTextView;
private ProgressDialog mProgressDialog;

@Override
protected void onCreate(Bundle savedInstanceState) {
    Log.d(TAG, "onCreate()");
    super.onCreate(savedInstanceState);
    setContentView(R.layout.signin_activity);

    // Views
    mStatusTextView = (TextView) findViewById(R.id.status);

    // Button listeners
    findViewById(R.id.sign_in_button).setOnClickListener(this);
    findViewById(R.id.sign_out_button).setOnClickListener(this);
    findViewById(R.id.disconnect_button).setOnClickListener(this);

    // [START configure_signin]
    // Configure sign-in to request the user's ID, email address, and basic
    // profile. ID and basic profile are included in DEFAULT_SIGN_IN.
    gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestEmail()
            .build();
    // [END configure_signin]

    // [START build_client]
    // Build a GoogleApiClient with access to the Google Sign-In API and the
    // options specified by gso.
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
            .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
            .build();
    // [END build_client]

    SignInButton signInButton = (SignInButton) findViewById(R.id.sign_in_button);
    signInButton.setSize(SignInButton.SIZE_STANDARD);
    signInButton.setScopes(gso.getScopeArray());
    // [END customize_button]
}

@Override
public void onStart() {
    Log.d(TAG, "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);
                }
            });
        }
}

// [START onActivityResult]
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.d(TAG, "onActivityResult()");
    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);
    }
    else if (requestCode == Constants.MAPS_ACTIVITY_FINISHED) {
        if (resultCode == Constants.SIGNOUT) {
            signOut();
        }
    }
}
// [END onActivityResult]


// [START handleSignInResult]
private void handleSignInResult(GoogleSignInResult result) {
    Log.d(TAG, "handleSignInResult:" + result.isSuccess());
    if (result.isSuccess()) {
        // Signed in successfully, show authenticated UI.
        GoogleSignInAccount acct = result.getSignInAccount();
        mStatusTextView.setText(getString(R.string.signed_in_fmt, acct.getDisplayName()));
        updateUI(true);
        Intent intent = new Intent(this, MapsActivity.class);
        startActivityForResult(intent, Constants.MAPS_ACTIVITY_FINISHED);
    } else {
        // Signed out, show unauthenticated UI.
        updateUI(false);
    }
}
// [END handleSignInResult]

// [START signIn]
private void signIn() {
    Log.d(TAG, "signin()");
    Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
    startActivityForResult(signInIntent, RC_SIGN_IN);
}
// [END signIn]

// [START signOut]
private void signOut() {
    Log.d(TAG, "signout()");
    Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(
            new ResultCallback<Status>() {
                @Override
                public void onResult(Status status) {
                    // [START_EXCLUDE]
                    updateUI(false);
                    // [END_EXCLUDE]
                }
            });
}
// [END signOut]
}

推荐答案

您的异常告诉您问题出在哪里:您的客户端未连接.首先，我建议您查看关于Google API客户端的本指南.

Your exception tells you what the problem is: your client is not connected. First of all I suggest that you check out this guide about Google API Client.

无论如何，您应该做的是将以下代码添加到您的应用中的某处:

Anyway, what you should do is add the following code somewhere to your app:

mGoogleApiClient.connect();

此代码将发送一个连接请求，如果一切正常，您的客户端将被连接.之后，在使用它之前，应检查客户端是否已连接，以免将来发生此错误:

This code will send a connection request, and if everything is fine, your client will get connected. After that, before you use it, you should check if the client is connected to avoid this error in future:

if (mGoogleApiClient.isConnected()) {
    // do your stuff with Google Api Client
}

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