Question

我正在研究Google GeoFencing。我在项目中使用tabView，创建Google API客户端时无法在上下文中使用“ this”关键字。如果我调试手机，应用程序将崩溃。救救我

这是我的Java代码：

     private Context mContext;// ive tried using like this, 


 mClient = new GoogleApiClient.Builder(getContext()) //ive also tried with getActivity();
            .addConnectionCallbacks((GoogleApiClient.ConnectionCallbacks) getContext())
            .addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener) getContext())
            .addApi(LocationServices.API)
            .addApi(Places.GEO_DATA_API)
            .enableAutoManage((FragmentActivity) mContext, 
    (GoogleApiClient.OnConnectionFailedListener) getContext())
            .build();

    mClient.connect();
    mGeofencing = new Geofencing(mClient,getContext());

Answer 1

我认为您正在使用片段

请在getActivity()中使用getContext()

private Context mContext;


mClient = new GoogleApiClient.Builder(getActivity()) 
    .addConnectionCallbacks((GoogleApiClient.ConnectionCallbacks) getActivity())
    .addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener) getActivity())
    .addApi(LocationServices.API)
    .addApi(Places.GEO_DATA_API)
    .enableAutoManage((FragmentActivity) mContext, (GoogleApiClient.OnConnectionFailedListener) getActivity())
    .build();

mClient.connect();
mGeofencing = new Geofencing(mClient,getActivity());

希望这对您有帮助...

谢谢

Answer 2

使用getActivity（）并为您的Fragment或活动实现GoogleApiClient.ConnectionCallbacks，GoogleApiClient.OnConnectionFailedListener。

创建Google API客户端时getContext无法正常工作

2 个答案: