该应用程序使用单例GameStorage为用户保存一些设置。它在模拟器和我自己的设备上运行良好，但从Google Play我得到了几个崩溃报告lateinit property prefs has not been initialized。
从Android 8.0到13.0一共有四份报告。
当应用启动时，在MainActivity中初始化单例

GameStorage.shared.init(applicationContext)

然后调用GameActivity中的方法：

if (GameStorage.shared.isSoundOn) {
    // ...
}

单例：

class GameStorage private constructor() : Activity() {

    private object HOLDER {
        val SHARED = GameStorage()
    }

    companion object {
        val shared: GameStorage by lazy { HOLDER.SHARED }
    }

    private lateinit var prefs: SharedPreferences

    private val prefsName = "GameStorage"

    fun init(context: Context) {
        prefs = context.getSharedPreferences(prefsName, Context.MODE_PRIVATE)
    }

    private fun read(key: String, defaultValue: Boolean): Boolean {
        return prefs.getBoolean(key, defaultValue)
    }

    fun write(key: String, value: Boolean) {
        val prefsEditor: SharedPreferences.Editor = prefs.edit()
        with(prefsEditor) {
            putBoolean(key, value)
            commit()
        }
    }

    var isSoundOn: Boolean
        get() {
            return read("isSoundOn", true)
        }
        set(value) {
            write("isSoundOn", value)
        }

    // ...
}