在Fragment中构建Google api客户端

Question

我在片段中构建google api客户端时遇到错误。我得到的错误是;

   java.lang.ClassCastException: net.janusjanus.we4x4_v1.upload cannot be cast to com.google.android.gms.common.api.GoogleApiClient$OnConnectionFailedListener

我已实施GoogleApiClient.ConnectionCallbacks，GoogleApiClient.OnConnectionFailedListener和LocationListener

并请求构建如下;

         mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener) getActivity())
            .addApi(LocationServices.API)
            .build();

首先我在声明新的GoogleApiClient.Builder时遇到了问题，我将其声明为;

          mGoogleApiClient = new GoogleApiClient.Builder(this)

作为错误加下划线，因此我必须尝试多种方式来声明它，getActivity()和getContext()。但我得到了同样的错误？

对于我在这里做错了什么以及正确的方法有什么想法？

Answer 1

在我的情况下，我必须声明GoogleApiClient.Builder如下;

 mGoogleApiClient = new GoogleApiClient.Builder(UploadPictures.this.getContext())

其中UploadPictures是片段名称。

希望这对某人有帮助。

Answer 2

实施GoogleApiClient.ConnectionCallbacks，GoogleApiClient.OnConnectionFailedListener和LocationListener

        @Override
        public void onConnectionFailed(ConnectionResult result) {
        }

        @Override
        public void onConnected(Bundle arg0) {
        }

        @Override
        public void onConnectionSuspended(int arg0) {
        }

        @Override
        public void onLocationChanged(Location location) {
        }

然后将代码更改为：

mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();