小编Tho*_*tes的帖子

我尝试使用EGL初始化GLES(因为我想从主线程中绘制而不是使用渲染器并从onDrawFrame内部绘制).我收到错误:"确保SurfaceView或相关的SurfaceHolder具有有效的Surface".显然mEgl.eglCreateWindowSurface失败,因为surfaceHolder没有有效的表面.如何获得具有有效Surface的SurfaceHolder？

我的Activity.onCreate方法是:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    GLSurfaceView surfaceView = new GLSurfaceView(this);
    setContentView(surfaceView);
    SurfaceHolder surfaceHolder = surfaceView.getHolder();
    Surface surface = surfaceHolder.getSurface();
    Log.v("HelloAndroid", "surface.isValid()= " + Boolean.toString(surface.isValid()));

    EGL10 mEgl = (EGL10) EGLContext.getEGL();
    EGLDisplay mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
    int[] version = new int[2];
    mEgl.eglInitialize(mEglDisplay, version);
    EGLConfig[] configs = new EGLConfig[1];
    int[] num_config = new int[1];
    int[] configSpec = {
            EGL10.EGL_NONE
    };
    mEgl.eglChooseConfig(mEglDisplay, configSpec, configs, 1, num_config);
    EGLConfig mEglConfig = configs[0];
    EGLContext mEglContext = mEgl.eglCreateContext(mEglDisplay, mEglConfig,
            EGL10.EGL_NO_CONTEXT, null);
    EGLSurface mEglSurface = null;
    Log.v("HelloAndroid", …