我已经将收集到的数据分享给了下面的Firebase Crashlytics。许多用户因此而崩溃。我该如何解决这个问题？

致以问候。

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
       at com.myproject.utils.PreferencesUtils.setAdmobEnable(PreferencesUtils.java:3)
       at com.myproject.ui.MainActivity$9.onDataChange(MainActivity.java:220)

BaseActivity类：

protected Context mContext;

PreferencesUtils类：

public static boolean getAdMobEnable(final Context context) {
    SharedPreferences preferences = context.getSharedPreferences(
        Constants.SHARED_PREFERENCE, 0
    return preferences.getBoolean(Constants.ADMOB_ENABLE, true);
public static void setAdmobEnable(final Context context, boolean value) {
    SharedPreferences preferences = context.getSharedPreferences(
        Constants.SHARED_PREFERENCE, 0
    SharedPreferences.Editor editor = preferences.edit();
    editor.putBoolean(Constants.ADMOB_ENABLE, value);
    editor.apply();