访问所有活动中的 GoogleApiClient 对象

如果大多数人想要使用 Google Plus 登录他们的应用程序，这似乎是一件简单的事情：s。

在活动 1 中：

我让用户登录。

登录后，我想让该用户对象全局可访问，因此我将其添加到 Application 对象中：

public class GlobalUserAccess extends Application {

    private GoogleApiClient mGoogleApiClient;

    public GlobalUserAccess(){
        mGoogleApiClient = null;
    }

    public void setClient(GoogleApiClient client){
        mGoogleApiClient = client;
    }

    public GoogleApiClient getClient(){
        return mGoogleApiClient;
    }
}

通过像这样绑定它：

GlobalUserAccess client = ((GlobalUserAccess) getApplicationContext());
client.setClient(mGoogleApiClient);

但是，当我尝试在活动 2 中访问它时：

GlobalUserAccess client = ((GlobalUserAccess) getApplicationContext());
String currentUser = Plus.AccountApi.getAccountName(client.getClient());

我收到错误：

E/GMPM: getGoogleAppId failed with status: 10

有人可以告诉我完成此任务的正确方法吗？我希望该用户对象可用于所有类，并且我在这方面花费了太多时间：|。

我是不是哪里搞砸了？啊...

编辑：活动 1 中的客户端创建代码

mGoogleApiClient = new GoogleApiClient.Builder(this)
        .addConnectionCallbacks(this)
        .addOnConnectionFailedListener(this)
        .addApi(Plus.API)
        .addScope(new Scope(Scopes.PROFILE))
        .addScope(new Scope(Scopes.EMAIL))
        .build();

我直接使用 Google 的 Git 存储库中的代码。它在活动 1 中成功登录并获取帐户信息。

在清单文件中添加 google play 位置服务依赖项和位置权限

AndroidManifest.xml

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

应用程序/build.gradle

compile 'com.google.android.gms:play-services-location:11.0.0'

GoogleApiHelper.java

public class GoogleApiHelper implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
        private static final String TAG = GoogleApiHelper.class.getSimpleName();
        private Context context;
        private GoogleApiClient mGoogleApiClient;
        private ConnectionListener connectionListener;
        private Bundle connectionBundle;

        public GoogleApiHelper(Context context) {
            this.context = context;
            buildGoogleApiClient();
            connect();
        }

        public GoogleApiClient getGoogleApiClient() {
            return this.mGoogleApiClient;
        }

        public void setConnectionListener(ConnectionListener connectionListener) {
            this.connectionListener = connectionListener;
            if (this.connectionListener != null && isConnected()) {
                connectionListener.onConnected(connectionBundle);
            }
        }

        public void connect() {
            if (mGoogleApiClient != null) {
                mGoogleApiClient.connect();
            }
        }

        public void disconnect() {
            if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
                mGoogleApiClient.disconnect();
            }
        }

        public boolean isConnected() {
            return mGoogleApiClient != null && mGoogleApiClient.isConnected();
        }

        private void buildGoogleApiClient() {
            mGoogleApiClient = new GoogleApiClient.Builder(context)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .addApi(LocationServices.API).build();

        }

        @Override
        public void onConnected(Bundle bundle) {
            connectionBundle = bundle;
            if (connectionListener != null) {
                connectionListener.onConnected(bundle);
            }
        }

        @Override
        public void onConnectionSuspended(int i) {
            Log.d(TAG, "onConnectionSuspended: googleApiClient.connect()");
            mGoogleApiClient.connect();
            if (connectionListener != null) {
                connectionListener.onConnectionSuspended(i);
            }
        }

        @Override
        public void onConnectionFailed(ConnectionResult connectionResult) {
            Log.d(TAG, "onConnectionFailed: connectionResult = " + connectionResult);
            if (connectionListener != null) {
                connectionListener.onConnectionFailed(connectionResult);
            }
        }

        public interface ConnectionListener {
            void onConnectionFailed(@NonNull ConnectionResult connectionResult);

            void onConnectionSuspended(int i);

            void onConnected(Bundle bundle);
        }
    }

App.java

public class App extends Application {
    private GoogleApiHelper googleApiHelper;
    private static App mInstance;

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

        mInstance = this;
        googleApiHelper = new GoogleApiHelper(mInstance);
    }

    public static synchronized App getInstance() {
        return mInstance;
    }

    public GoogleApiHelper getGoogleApiHelperInstance() {
        return this.googleApiHelper;
    }
    public static GoogleApiHelper getGoogleApiHelper() {
        return getInstance().getGoogleApiHelperInstance();
    }
}

Note:不要忘记将此子类的完全限定名称指定为 AndroidManifest.xml 标记中的“android:name”属性。

您可以通过回调获取 apiClient 并获取何时连接

App.getGoogleApiHelper().setConnectionListener(new GoogleApiHelper.ConnectionListener() {
            @Override
            public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

            }

            @Override
            public void onConnectionSuspended(int i) {

            }

            @Override
            public void onConnected(Bundle bundle, GoogleApiClient googleApiClient) {
                //this function will call whenever google api connected or already connected when setting listener
                //You are connected do what ever you want
                //Like i get last known location
                Location location = LocationServices.FusedLocationApi.getLastLocation(googleApiClient);
            }
        });

或者你也可以这样获取

if(App.getGoogleApiHelper().isConnected())
{
    //Get google api client from anywhere
    GoogleApiClient client = App.getGoogleApiHelper().getGoogleApiClient();
}