原由

Cocos creator官方推荐用多进程的方式发布到原生，没有单线程，但是需求方需要让我们把cocos用view的形式嵌入到某一个页面

效果图

ieh0p-9sfik.gif

工具信息

Cocos Dashboard: 1.2.3
Cocos Editor :3.4.2
Android studio :2021.3.1 Patch 1

第一步：把CocosActivity 改装成一个view

public class CocosNativeHelper implements SurfaceHolder.Callback, LifecycleObserver {
    private Activity activity;
    private ViewGroup viewGroup;
    private CocosSurfaceView mSurfaceView;
    private boolean mDestroyed;
    private boolean engineInit = false;

    public CocosNativeHelper(FragmentActivity activity, ViewGroup viewGroup) {
        this.activity = activity;
        this.viewGroup = viewGroup;
        activity.getLifecycle().addObserver(this);
        GlobalObject.setActivity(activity);
        CocosHelper.registerBatteryLevelReceiver(activity);
        CocosHelper.init(activity);
        CanvasRenderingContext2DImpl.init(activity);
        onLoadNativeLibraries();
        initView();
    }

    protected void initView() {
        ViewGroup.LayoutParams frameLayoutParams = new ViewGroup.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT);
        mSurfaceView = new CocosSurfaceView(activity);
        mSurfaceView.getHolder().addCallback(this);
        viewGroup.addView(mSurfaceView);
    }
    //设置游戏路径
    public void start(String path) {
        onCreateNative(activity, activity.getAssets(), getAbsolutePath(activity.getObbDir()), Build.VERSION.SDK_INT, path);
    }

    public void onDestroy() {
        onSurfaceDestroyNative();
        CocosHelper.unregisterBatteryLevelReceiver(activity);
        CanvasRenderingContext2DImpl.destroy();
        restartVm();
        viewGroup.removeView(mSurfaceView);
    }

    public void onPause() {
        onPauseNative();
    }

    public void onResume() {
        onResumeNative();
    }

    public void onStop() {
        onStopNative();
    }

    public void onStart() {
        onStartNative();
    }

    public void onLowMemory() {
        onLowMemoryNative();
    }


    private static String getAbsolutePath(File file) {
        return (file != null) ? file.getAbsolutePath() : null;
    }

    private void onLoadNativeLibraries() {
        try {
            ApplicationInfo ai = activity.getPackageManager().getApplicationInfo(activity.getPackageName(), PackageManager.GET_META_DATA);
            Bundle bundle = ai.metaData;
            String libName = bundle.getString("android.app.lib_name");
            System.loadLibrary(libName);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    private native void onCreateNative(Activity activity, AssetManager resourceManager, String obbPath, int sdkVersion, String path);

    private native void onSurfaceCreatedNative(Surface surface);

    private native void onSurfaceChangedNative(int width, int height);

    private native void onSurfaceDestroyNative();

    private native void onPauseNative();

    private native void onResumeNative();

    private native void onStopNative();

    private native void onStartNative();

    private native void onLowMemoryNative();

    private native void onWindowFocusChangedNative(boolean hasFocus);

    private native void restartVm();

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        if (!mDestroyed) {
            onSurfaceCreatedNative(holder.getSurface());

            engineInit = true;
        }
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        if (!mDestroyed) {
            onSurfaceChangedNative(width, height);
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        if (!mDestroyed) {
            onSurfaceDestroyNative();
            engineInit = false;
        }
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_CREATE)
    public void onOwnerCreate() {
        SDKWrapper.shared().init(activity);
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
    public void onOwnerOnResume() {
        SDKWrapper.shared().onResume();
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_START)
    public void onOwnerOnStart() {
        SDKWrapper.shared().onStart();
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
    public void onOwnerOnPause() {
        SDKWrapper.shared().onPause();
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
    public void onOwnerOnStop() {
        SDKWrapper.shared().onStop();
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
    public void onOwnerDestroy() {
        SDKWrapper.shared().onDestroy();
        onSurfaceDestroyNative();
    }
}

第二步：修改JniCocosActivity.cpp，使资源能够动态加载

为了后续游戏容器能动态设置本地下的游戏资源，需要修改JniCocosActivity.cpp里的Java_com_cocos_lib_CocosActivity_onCreateNative方法，增加路径参数 filePath，截图和代码都在下面

image.png

        if (!defaultResourcePath.empty()) {
            cc::FileUtilsAndroid::getInstance()->setDefaultResourceRootPath(defaultResourcePath);
        }

第三步：现在已经可以动态加载游戏，但是游戏切换还需要处理

在JniCocosActivity.cpp中，找到createGame方法的调用，在else中增加 game->restartVM();，
就可以做到游戏切换了，至此完结

image.png