如何在伴随对象Kotlin中保留单例类对象的引用(How to keep the reference of the singleton class object in the companion ob

如何在伴随对象Kotlin中保留单例类对象的引用(How to keep the reference of the singleton class object in the companion object, Kotlin)

我要转换的代码如下：

public class AndroidLauncher extends AndroidApplication { public static AndroidLauncher androidLauncher; @Override protected void onCreate (Bundle savedInstanceState) { super.onCreate(savedInstanceState); androidLauncher = this; } }

android studio生成的代码是什么;

class AndroidLauncher : AndroidApplication() { protected override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) androidLauncher = this } companion object { var androidLauncher: AndroidLauncher } }

这段代码给了我错误，这是;

属性必须被初始化或是抽象的

我正在开发一个libgdx游戏，所以我会使用这种方法从我想要的任何地方使用Game对象。 它是一个单例类，所以它不会泄漏任何内存。

The code that I want to convert is the following;

public class AndroidLauncher extends AndroidApplication { public static AndroidLauncher androidLauncher; @Override protected void onCreate (Bundle savedInstanceState) { super.onCreate(savedInstanceState); androidLauncher = this; } }

What android studio generated code is this;

class AndroidLauncher : AndroidApplication() { protected override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) androidLauncher = this } companion object { var androidLauncher: AndroidLauncher } }

This code gives me error, which is;

Property must be initialized or be abstract

I'm developing a game with libgdx, so I'll use this approach to use the Game object from anywhere I want. It's a singleton class so it won't leak any memory.

最满意答案

使用lateinit来指示该字段稍后将被初始化。

companion object { lateinit var androidLauncher: AndroidLauncher }

Use lateinit to indicate that the field will be initialized later.

companion object { lateinit var androidLauncher: AndroidLauncher }