這拉位置的~就一行
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
只要mLastLocation不是null接下來都沒問題
喔還有再跑這行前都會確認mGoogleApiClient
 if (mGoogleApiClient != null) {
                if (mGoogleApiClient.isConnected())
                看下面初始化的地方

初始化
private void initGoogleApi() {
        status = (LocationManager) (this.getSystemService(Context.LOCATION_SERVICE));
        if (mGoogleApiClient == null) {
            mGoogleApiClient = new GoogleApiClient.Builder(this)
                    .addConnectionCallbacks(this)
                    .addOnConnectionFailedListener(this)
                    .addApi(LocationServices.API)
                    .build();
            mGoogleApiClient.connect();
        }
        if(!status.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            LogHelper.printDebugLog("No detect gps");
            String type = SharedpreferencesEditor.getString(SharedpreferencesEditor.Action.WEATHER_DATA_TYPE.key);
            if(type.equals(""))
                DialogUtils.makeAlertDialog(this, getString(R.string.dialog_title_gps_not_open_gps),
                        getString(R.string.dialog_message_gps_not_open_gps) + "臺北市中正區", getString(R.string.dialog_btn_confirm));
            else
                DialogUtils.makeAlertDialog(this, getString(R.string.dialog_title_gps_not_open_postal),
                        getString(R.string.dialog_message_gps_not_open_postal), getString(R.string.dialog_btn_confirm));
        }

        if (status.isProviderEnabled(LocationManager.GPS_PROVIDER) && status.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
            //如果GPS或網路定位開啟，呼叫locationServiceInitial()更新位置
            LogHelper.printDebugLog("No detect gpc");
            if (mGoogleApiClient != null) {
                if (mGoogleApiClient.isConnected())
                    getMyLocation();
                else
                    mGoogleApiClient.connect();
            } else {
                Toast.makeText(HomeActivity.this, "請開啟定位", Toast.LENGTH_LONG).show();
                startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)); //開啟設定頁面
            }
        }
    }


callback:
 @Override
    public void onConnected(@Nullable Bundle bundle) {
        getMyLocation();
    }