OpenGL ES 2.0中搭建入门（二）

检测手机是否支持OpenGL 基本都支持

   /*检测是否支持OpenGLEs2.0*/
    private void checkSupported() {
        ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
        ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();
        supportsEs2 = configurationInfo.reqGlEsVersion >= 0x2000;

        boolean isEmulator = Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1
                && (Build.FINGERPRINT.startsWith("generic")
                || Build.FINGERPRINT.startsWith("unknown")
                || Build.MODEL.contains("google_sdk")
                || Build.MODEL.contains("Emulator")
                || Build.MODEL.contains("Android SDK built for x86"));
        supportsEs2 = supportsEs2 || isEmulator;
    }

Activity的生命周期

   /*生命周期*/
   @Override
   protected void onPause() {
       super.onPause();
       glSurfaceView.onPause();
   }

   @Override
   protected void onResume() {
       super.onResume();
       glSurfaceView.onResume();
   }

全部Activity代码

public class MainActivity extends AppCompatActivity {
    private boolean supportsEs2;
    private GLSurfaceView glSurfaceView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        checkSupported();
        if (supportsEs2){
            glSurfaceView = new GLSurfaceView(this);
           glSurfaceView.setEGLConfigChooser(8,8,8,8,16,0);
            glSurfaceView.setRenderer(new GLRenderer());

            setContentView(glSurfaceView);
        }else{
           // setContentView(R.layout.activity_main);
            Toast.makeText(MainActivity.this,"暂不支持OpenGL",Toast.LENGTH_SHORT).show();
        }


    }

    /*检测是否支持OpenGLEs2.0*/
    private void checkSupported() {
        ActivityManager activityManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
        ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();
        supportsEs2 = configurationInfo.reqGlEsVersion >= 0x2000;

        boolean isEmulator = Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1
                && (Build.FINGERPRINT.startsWith("generic")
                || Build.FINGERPRINT.startsWith("unknown")
                || Build.MODEL.contains("google_sdk")
                || Build.MODEL.contains("Emulator")
                || Build.MODEL.contains("Android SDK built for x86"));
        supportsEs2 = supportsEs2 || isEmulator;
    }

    /*生命周期*/
    @Override
    protected void onPause() {
        super.onPause();
        glSurfaceView.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        glSurfaceView.onResume();
    }
}

1Render 中代码

 public class GLRenderer implements GLSurfaceView.Renderer {

    @Override
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {

    }

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

    }

    @Override
    public void onDrawFrame(GL10 gl) {

    }
}

2 Renderer显示背景颜色

@Override
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
        gl.glClearColor(1f, 0f, 0f, 0f);
    }

    @Override
    public void onSurfaceChanged(GL10 gl, int width, int height) {
        gl.glViewport(0, 0, width, height);
    }

    @Override
    public void onDrawFrame(GL10 gl) {
        gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
    }

效果