在我的设备中联想YT3-850F /联想YOGATab3出错

Question

使用School Management Software

Logcat错误 -

  

引起：java.lang.NullPointerException：at   in.junctiontech.school.NetworkChangeListener.onReceive（NetworkChangeListener.java:42）

@Override
public void onReceive(Context context, Intent intent) {
   // final SharedPreferences sp = context.getSharedPreferences("data_auto_send", MODE_PRIVATE);
    final SharedPreferences sp = Prefs.with(context).getSharedPreferences();
    final ConnectivityManager connMgr = (ConnectivityManager) context
            .getSystemService(CONNECTIVITY_SERVICE);

    final android.net.NetworkInfo wifi = connMgr
            .getNetworkInfo(ConnectivityManager.TYPE_WIFI);

    final android.net.NetworkInfo mobile = connMgr
            .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);


   }