Android的Libgdx，调用在比赛结束后的另一项活动启动按钮上点击 [英] Android-Libgdx, Calling Another Activity after the Game starts on Button click

问题描述

我面临的一个主要问题，当我需要调用另一个活动是在比赛开始后，单击按钮时。本场比赛是通过启动（游戏）的Andr​​oidApplication接口方法调用。

I faced a major problem when I need to call another activity when the button is clicked after the Game is started. The Game is called via initiate(game, ) method from AndroidApplication interface.

在正常的活动，我可以方便地调用另一个活动，但它似乎是很难叫从实现AndroidApplication Libgdx类另一个活动。

In normal Activity, I can easily call the another Activity but it seems to be difficult to call another Activity from Libgdx class that implements AndroidApplication.

任何人都可以提出一个适当的方法来调用从实现AndroidApplication接口Libgdx类的活动？

Could anyone suggest a proper method to call the Activity from Libgdx class that implements AndroidApplication interface?

我试图做到这一点的一个星期，但似乎我的方法是完全错误的。

I tried to do this for a week but it seems that my method is totally wrong..

在此先感谢。

推荐答案

定义一个回调接口在你LibGdx类，并用它来通知你的Andr​​oidLauncher开始新的活动。

Define a callback interface in you LibGdx class, and use it to notify your AndroidLauncher to start the new activity.

例如在LibGdx游戏类：

For example in your LibGdx game class:

// Your Game class in the core package
public class MyGame extends Game {

    // Define an interface for your various callbacks to the android launcher
    public interface MyGameCallback {
        public void onStartActivityA();
        public void onStartActivityB();
        public void onStartSomeActivity(int someParameter, String someOtherParameter);
    }

    // Local variable to hold the callback implementation
    private MyGameCallback myGameCallback;

    // ** Additional **
    // Setter for the callback
    public void setMyGameCallback(MyGameCallback callback) {
        myGameCallback = callback;
    }

    @Override
    public void create () {
        ...
    }

    ...

    private void someMethod() {
        ...
        // check the calling class has actually implemented MyGameCallback
        if (myGameCallback != null) {

            // initiate which ever callback method you need.
            if (someCondition) {
                myGameCallback.onStartActivityA();
            } else if (someOtherCondition) {
                myGameCallback.onStartActivityB();
            } else {
                myGameCallback.onStartSomeActivity(someInteger, someString);
            }

        } else {
            Log.e("MyGame", "To use this class you must implement MyGameCallback!")
        }
    }
}

然后确保你的Andr​​oidLauncher实现所需的接口：

Then ensure your AndroidLauncher implements the required interface:

// Your AndroidLauncher
public class AndroidLauncher extends AndroidApplication implements MyGame.MyGameCallback {

    @Override
    protected void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();

        // create an instance of MyGame, and set the callback
        MyGame myGame = new MyGame;
        // Since AndroidLauncher implements MyGame.MyGameCallback, we can just pass 'this' to the callback setter.
        myGame.setMyGameCallback(this);

        initialize(myGame, config);
    }

    @Override
    public void onStartActivityA() {
        Intent intent = new Intent(this, ActivityA.class);
        startActivity(intent);
    }

    @Override
    public void onStartActivityB(){
        Intent intent = new Intent(this, ActivityB.class);
        startActivity(intent);
    }

    @Override
    public void onStartSomeActivity(int someParameter, String someOtherParameter){
        Intent intent = new Intent(this, ActivityA.class);

        // do whatever you want with the supplied parameters.
        if (someParameter == 42) {
            intent.putExtra(MY_EXTRA, someOtherParameter);
        }
        startActivity(intent);
    }

}

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