将对象放入包 [英] Put objects into bundle

问题描述

问候，

我有一个游戏，我要保存在移动画布捆绑的对象（creatues），这样，当有人暂停/离开应用程序，对象可以留他们在那里。

I have a game, and i want to save the objects ( creatues ) that move on canvas to a bundle so that when someone pauses/leaves the app, the objects can stay where they were.

我已经看过了LunarLanding游戏，他们节省了航天飞机的坐标成束，并从中读出我想要做相同的（如果没有更好的办法），但我有一个自定义类型的对象，我不知道如何保存它们，并从包中读取。

I have looked at the LunarLanding game where they save the coordinates of the space shuttle into bundles and read from them and i want to do same ( if there is no better way ) but i have objects of a custom type and i am not sure how to save them and read from the bundle.

我可以做保存单独的对象的所有部件，并把他们重新走到一起，但我有很多的对象，而且也只是丑陋的code做了这一切。

I could do the save of all the parts of the object individually and put them back together, but i have a lot of objects and that would just be ugly code to do all that.

这将是好了，如果我能一个对象保存到一个包，但到目前为止，我没有运气上搜索如何这样做互联网。

It would be just great if i could save an object to a bundle, but so far i had no luck searching the internet on how to do so.

我也想实施 Parcelable 来我的对象，但我想知道是否有任何其他方式。

I was also thinking about implementing Parcelable to my object, but i want to know if there is any other way.

有什么建议？
谢谢！

Any suggestions?
Thanks!

推荐答案

从技术上来说，的onSaveInstanceState（）方法被调用大多只在方向变化，如果我没记错的话。如果你想持久性数据，你应该使用的onPause（）或的onStop（）回调，和序列化的游戏状态。

Technically, the onSaveInstanceState() method is called mostly only on orientation change if I remember correctly. If you want to make persistent data, you should use the onPause() or onStop() callback, and serialize the game state.

你能做到这一点的方式要么是通过存储状态SQLite数据库（似乎矫枉过正），或者让这个你可以序列化，通过实施序列化跟踪的实体对象接口，和对象保存到文件中。

The ways you can do that is either by storing the state in a SQLite database (seems overkill), or make it so that you can serialize the object that keeps track of the entities via implementing the Serializable interface, and save the object to a file.

连载：

@Override
public void onPause()
{
    super.onPause();
    FileOutputStream out = null;
    try
    {
        out = openFileOutput("GameModelBackup",Context.MODE_PRIVATE);

        try
        {
            ObjectOutputStream oos = new ObjectOutputStream(out);
            oos.writeObject(gm);
        }
        catch(IOException e)
        {
            Log.d(this.getClass().toString(), e.getMessage());
        }
    }
    catch(FileNotFoundException e)
    {
        Log.d(this.getClass().toString(), e.getMessage());
    }
    finally
    {
        try
        {
            if(out != null) out.close();
        }
        catch(IOException e)
        {
            Log.d(this.getClass().toString(), e.getMessage());
        }
    }
} 

反序列化：

@Override
public void onResume()
{
    super.onResume();
    FileInputStream in = null;
    try
    {
        in = openFileInput("GameModelBackup");
        ObjectInputStream oos = new ObjectInputStream(in);
        try
        {
            gm = (GameModel)oos.readObject();
        }
        catch(ClassNotFoundException e)
        {
            gm = null;
        }
    }
    catch(IOException e)
    {
        Log.d(this.getClass().toString(), e.getMessage());
    }
    finally
    {
        try
        {
            if(in != null) in.close();
        }
        catch(IOException e) {}
    }
}

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