GLSurfaceView使用-入门之HelloWorld--画背景图

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package com.example.opengl_01;import java.nio.ByteBuffer;import java.nio.ByteOrder;import java.nio.FloatBuffer;import javax.microedition.khronos.egl.EGLConfig;import javax.microedition.khronos.opengles.GL10;import android.app.Activity;import android.opengl.GLSurfaceView;import android.os.Bundle;import android.util.Log;public class MainActivity extends Activity { private final String TAG = "MainActivity"; private GLSurfaceView glSurefaceView; @Override public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  glSurefaceView = new GLSurfaceView(this);  glSurefaceView.setRenderer(new GLSurfaceViewRender());  this.setContentView(glSurefaceView); } @Override protected void onResume() {  super.onResume();  glSurefaceView.onResume(); } @Override protected void onPause() {  super.onStop();  glSurefaceView.onPause(); } class GLSurfaceViewRender implements GLSurfaceView.Renderer {  @Override  public void onSurfaceCreated(GL10 gl, EGLConfig config) {   Log.i(TAG, "onSurfaceCreated");   // 设置背景颜色   gl.glClearColor(0.0f, 0f, 1f, 0.5f);  }  @Override  public void onSurfaceChanged(GL10 gl, int width, int height) {   // 设置输出屏幕大小   gl.glViewport(0, 0, width, height);   Log.i(TAG, "onSurfaceChanged");  }  @Override  public void onDrawFrame(GL10 gl) {   Log.i(TAG, "onDrawFrame");   // 清除屏幕和深度缓存(如果不调用该代码, 将不显示glClearColor设置的颜色)   // 同样如果将该代码放到 onSurfaceCreated 中屏幕会一直闪动   gl.glClear(GL10.GL_COLOR_BUFFER_BIT);  } }}

           

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