Android onDrawFrame、requestRender和渲染线程？|OpenGLES2.0

我在OpenGL ES 2.0中使用游戏循环的外部线程运行我的应用程序时遇到问题

这是我的初级课程中的onCreate：

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


    mGLView = new MyGLView(this);

    System.out.println(running);

    setContentView(mGLView);

    loop = new GameLoop();

    //loop.run();  <- this is supposed to run the loop but when its called,
    // nothing really appears on screen. just title of the app.


}

所以基本上，如果我不调用

loop.run（）我得到一个静态图片，基本上是onDrawFrame的一个周期，完成后，logCat上不会弹出任何其他内容

接下来发生的事情是，如果我调用
loop.run（）
，基本上循环会一直进行下去，但屏幕上没有显示任何内容。我只看到一个标题屏幕，而不是glView

我做错了什么？还有其他方法更新屏幕吗？
线程必须用start（）而不是run（）启动。
哇，我真不敢相信这么简单！谢谢如果start确实启动了线程，那么run做什么呢？
private final static int maxFPS = 30;
private final static int maxFrameSkips = 5;
private final static int framePeriod = 1000 / maxFPS;

public static boolean running;
public final static String TAG = "test";

public GameLoop() {

}

@Override
public void run() {
    running = StartPoint.isRunning();
    long beginTime;
    long timeDiff;
    int sleepTime;
    int framesSkipped;
    sleepTime = 0;
    while (running) {

        running = StartPoint.isRunning();

        beginTime = System.currentTimeMillis();
        framesSkipped = 0;

        StartPoint.mGLView.requestRender(); // <- supposed to re-render?

        timeDiff = System.currentTimeMillis() - beginTime;
        sleepTime = (int) (framePeriod - timeDiff);

        if (sleepTime > 0) {
            try {
                Thread.sleep(sleepTime);

            } catch (InterruptedException e) {
            }
        }

        while (sleepTime < 0 && framesSkipped < maxFrameSkips) {

            sleepTime += framePeriod;
            framesSkipped++;
            Log.d(TAG, "Frames Skipped");
        }
    }

}

 private static final String TAG = "Renderer";

BoundsSquare square;

private final float[] mMVPMatrix = new float[16];
private final float[] mProjMatrix = new float[16];
private final float[] mVMatrix = new float[16];
private final float[] mRotationMatrix = new float[16];

private int camWidth,camHeight;

Camera2D cam;

Vector3 vec;
public long cycle = 0; // used this to determine how many cycles 
//went through, it is stuck on cycle 0, nothing else happens after first render

@Override
public void onDrawFrame(GL10 nope) {
    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);

    //set camera position
            cam.setFrustum(mProjMatrix, mVMatrix, mMVPMatrix);

    square.draw(mMVPMatrix);
    //square.animate(tick);


    //square.setBounds(vec);
    System.out.println("Cycle " + cycle + " Ended");
    cycle++;

}

@Override
public void onSurfaceChanged(GL10 nope, int width, int height) {


    cam.setRatio(width, height);

    GLES20.glViewport(0, 0, width, height);

}

public static int loadShader(int type, String shaderCode) {

    // create a vertex shader type (GLES20.GL_VERTEX_SHADER)
    // or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
    int shader = GLES20.glCreateShader(type); 

    // add the source code to the shader and compile it
    GLES20.glShaderSource(shader, shaderCode);
    GLES20.glCompileShader(shader);

    return shader;
}

@Override
public void onSurfaceCreated(GL10 gl,
        javax.microedition.khronos.egl.EGLConfig config) {
    GLES20.glClearColor(0.0f, 0.0f, 1.0f, 0.5f);
    camWidth=480;camHeight=320;
    cam= new Camera2D(0, 0, camHeight, camWidth);
    // initialize a square
    vec = new Vector3 (10,10,40,90);
    square = new BoundsSquare(vec);
    System.out.println("Surface Created");

}