一、自定义GLSurfaceView

• 继成SurfaceView，并实现其CallBack回调
• 自定义GLThread线程类，主要用于OpenGL的绘制操作
• 添加设置Surface和EglContext的方法
• 提供和系统GLSurfaceView相同的调用方法
  
  二、代码使用
  1、自定义MyEGLSurfaceView

public class MyEGLSurfaceView extends SurfaceView implements SurfaceHolder.Callback{private Surface surface;private EGLContext eglContext;private MyEGLThread mEGLThread;private MyGLRender mGLRender;public final static int RENDERMODE_WHEN_DIRTY = 0;//自动模式:GL线程以一 定的时间间隔自动的循环调用用户实现的onDrawFrame（）方法进行一帧一帧的绘制public final static int RENDERMODE_CONTINUOUSLY = 1;//"脏"模式 也就是说当用户需要重绘的时候，主动 “拉”这个重绘过程，有点类似于Canvas中的invalidate（），一般情况下使用脏模式，这样可以有效降低cpu负载private int mRenderMode = RENDERMODE_CONTINUOUSLY;public MyEGLSurfaceView(Context context) {this(context, null);}public MyEGLSurfaceView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public MyEGLSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);getHolder().addCallback(this);}public void setRender(MyGLRender mGLRender) {this.mGLRender = mGLRender;}//设置模式public void setRenderMode(int mRenderMode) {if(mGLRender == null){throw  new RuntimeException("must set render before");}this.mRenderMode = mRenderMode;}public void setSurfaceAndEglContext(Surface surface, EGLContext eglContext){this.surface = surface;this.eglContext = eglContext;}//获取EglContext上下文public EGLContext getEglContext(){if(mEGLThread != null){return mEGLThread.getEglContext();}return null;}//当需要重绘时，调用requestRender()方法public void requestRender(){if(mEGLThread != null){mEGLThread.requestRender();}}@Overridepublic void surfaceCreated(SurfaceHolder holder) {if(surface == null){surface = holder.getSurface();}//开启一个线程处理EGLmEGLThread = new MyEGLThread(new WeakReference<MyEGLSurfaceView>(this));mEGLThread.isCreate = true;mEGLThread.start();}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {mEGLThread.width = width;mEGLThread.height = height;mEGLThread.isChange = true;}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {mEGLThread.onDestory();mEGLThread = null;surface = null;eglContext = null;}public interface MyGLRender{void onSurfaceCreated();void onSurfaceChanged(int width, int height);void onDrawFrame();}//自定义MyEGLThread线程类，主要用于OpenGL的绘制操作static class MyEGLThread extends Thread{private WeakReference<MyEGLSurfaceView> meglSurfaceViewWeakReference;private EglHelper eglHelper = null;private Object object = null;private boolean isExit = false;private boolean isCreate = false;private boolean isChange = false;private boolean isStart = false;private int width;private int height;public MyEGLThread(WeakReference<MyEGLSurfaceView> meglSurfaceViewWeakReference) {this.meglSurfaceViewWeakReference = meglSurfaceViewWeakReference;}@Overridepublic void run() {super.run();isExit = false;isStart = false;object = new Object();eglHelper = new EglHelper();eglHelper.initEgl(meglSurfaceViewWeakReference.get().surface, meglSurfaceViewWeakReference.get().eglContext);while (true){if(isExit){//释放资源release();break;}if(isStart){if(meglSurfaceViewWeakReference.get().mRenderMode == RENDERMODE_WHEN_DIRTY){synchronized (object){try {object.wait();} catch (InterruptedException e) {e.printStackTrace();}}}else if(meglSurfaceViewWeakReference.get().mRenderMode == RENDERMODE_CONTINUOUSLY){try {Thread.sleep(1000 / 60);} catch (InterruptedException e) {e.printStackTrace();}}else{throw  new RuntimeException("mRenderMode is wrong value");}}onCreate();onChange(width, height);onDraw();isStart = true;}}private void onCreate(){if(isCreate && meglSurfaceViewWeakReference.get().mGLRender != null){isCreate = false;meglSurfaceViewWeakReference.get().mGLRender.onSurfaceCreated();}}private void onChange(int width, int height){if(isChange && meglSurfaceViewWeakReference.get().mGLRender != null){isChange = false;meglSurfaceViewWeakReference.get().mGLRender.onSurfaceChanged(width, height);}}private void onDraw(){if(meglSurfaceViewWeakReference.get().mGLRender != null && eglHelper != null){meglSurfaceViewWeakReference.get().mGLRender.onDrawFrame();if(!isStart){meglSurfaceViewWeakReference.get().mGLRender.onDrawFrame();}eglHelper.swapBuffers();}}private void requestRender(){if(object != null){synchronized (object){object.notifyAll();}}}public void onDestory(){isExit = true;requestRender();}public void release(){if(eglHelper != null){eglHelper.destoryEgl();eglHelper = null;object = null;meglSurfaceViewWeakReference = null;}}public EGLContext getEglContext(){if(eglHelper != null){return eglHelper.getmEglContext();}return null;}}}

2、创建一个MyRender类实现MyEGLSurfaceView.MyGLRender

public class MyRender  implements MyEGLSurfaceView.MyGLRender{private static final String TAG = "wq892373445";public MyRender(){}@Overridepublic void onSurfaceCreated() {Log.d(TAG, "onSurfaceCreated");}@Overridepublic void onSurfaceChanged(int width, int height) {GLES20.glViewport(0, 0, width, height);Log.d(TAG, "onSurfaceChanged");}@Overridepublic void onDrawFrame() {Log.d(TAG, "onDrawFrame");GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);GLES20.glClearColor(0.0f, 1.0f, 0.0f, 1.0f);}
}

3、继承MyGlSurfaceView

public class MyGlSurfaceView extends MyEGLSurfaceView{public MyGlSurfaceView(Context context) {this(context, null);}public MyGlSurfaceView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public MyGlSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);setRender(new MyRender());setRenderMode(MyEGLSurfaceView.RENDERMODE_WHEN_DIRTY);}
}

4、布局文件中使用

 <com.wq.myglsurfaceview.MyGlSurfaceViewandroid:layout_width="match_parent"android:layout_height="match_parent" />

最后效果如下：