android - GoogleApiClient 连接总是第一次失败但第二次成功

Question

我通过 GoogleApiClient 为应用设置了 google plus 登录。

每当应用程序首次安装并尝试通过 GoogleApiClient 建立连接时，它永远不会成功，并且总是以 onConnectionFailed 和 result 结束包含:

ConnectionResult{statusCode=SIGN_IN_REQUIRED, resolution=PendingIntent{4130e760: android.os.BinderProxy@4130e700}}

但是当第二次登录时，它的调用成功并且 onConnected 命中。为什么一次就能成功？

我的 Builder 参数有问题吗？

public void connectGoogleApi() {
    mGoogleApiClient = new GoogleApiClient.Builder(mainAppContext).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(Plus.API).addScope(Plus.SCOPE_PLUS_LOGIN).build();
    mGoogleApiClient.connect();
}

public void onConnectionFailed(ConnectionResult result) {
    if (!result.hasResolution()) {
        GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), this, 0).show();
        return;
    }

    if (!mIntentInProgress) {
        // Store the ConnectionResult for later usage
        mConnectionResult = result;
        resolveSignInError();
    }

}

Answer 1

正如官方文档所述here :

If you are using GoogleApiClient to connect to APIs that require authentication, like Google Drive or Google Play Games, there's a good chance your first connection attempt will fail and your app will receive a call to onConnectionFailed() with the SIGN_IN_REQUIRED error because the user account was not specified.