HarmonyOS 鸿蒙Next 开发 Opengl ES native 应用

HarmonyOS 鸿蒙Next 开发 Opengl ES native 应用

本人鸿蒙新手，在开发native项目中，想使用Opengl ES 实现绘图功能，遇到了点问题，希望各位技术大佬帮忙看下！！

开发环境 deveco 3.1 API6

整体思路：

1. native层实现这4个方法

public static native void Init();
public static native void SurfaceChanged(int width, int height);
public static native void DrawFrame();
public static native void Destroy();

1. Java层用 SurfaceOps.Callback 调用 native方法

public class Triangle {
    private SCallBacks callBacks;
    private final Context mContext;
    private SurfaceOps surfaceOps;
    public Triangle(Context context) {
        this.mContext = context;
    }

    public SurfaceProvider initSliceLayout() {
        SurfaceProvider testSurfaceView = new SurfaceProvider(mContext);
        if(testSurfaceView.getSurfaceOps().isPresent()){
            surfaceOps = testSurfaceView.getSurfaceOps().get();
            callBacks = new SCallbacks();
            surfaceOps.addCallback(callBacks);
            surfaceOps.setKeepScreenOn(true);
        }
        testSurfaceView.setWidth(1080);
        testSurfaceView.setHeight(2000);

        testSurfaceView.pinToZTop(true);
        return testSurfaceView;
    }

    public void onDraw(){

    }

    private static class SCallbacks implements SurfaceOps.Callback {

        static {
            System.loadLibrary("entry");
        }

        @Override
        public void surfaceCreated(SurfaceOps ops) {
            nativeInit();
            YimaHiLog.log("create");
        }

        @Override
        public void surfaceChanged(SurfaceOps ops, int format, int width, int height) {
            nativeSurfaceChanged(width, height);
            YimaHiLog.log("change");
            nativeDrawFrame();
            YimaHiLog.log("draw");
        }

        @Override
        public void surfaceDestroyed(SurfaceOps ops) {
            nativeDestroy();
        }

        private static native void nativeInit();
        private static native void nativeSurfaceChanged(int width, int height);
        private static native void nativeDrawFrame();
        private static native void nativeDestroy();
    }

}

1. 在 MainAbilitySlice onStart 添加

@Override
public void onStart(Intent intent) {
    super.onStart(intent);
    super.setUIContent(myLayout);

    Triangle triangle = new Triangle(this);
    SurfaceProvider provider = triangle.initSliceLayout();
    myLayout.addComponent(provider);

}

为啥画不出来呢？？？？

如果各位大佬有类似的demo或文档也可以发给我。

本段代码在安卓端正常画出一条线，在鸿蒙这边不显示。。