Eclipse中通过Android模拟器调用OpenGL ES2.0函数操作步骤

package com.firstopenglproject.android;

import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
import android.content.pm.ConfigurationInfo;
import android.opengl.GLSurfaceView;
import android.os.Build;
import android.os.Bundle;
import android.view.Menu;
import android.widget.Toast;

public class FirstOpenGLProjectActivity extends Activity {
    private GLSurfaceView glSurfaceView;
    private boolean rendererSet = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_first_open_glproject);
        glSurfaceView = new GLSurfaceView(this);
        
        final ActivityManager activityManager = 
                (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        final ConfigurationInfo configurationInfo = 
                activityManager.getDeviceConfigurationInfo();
        final boolean supportsEs2 =
                configurationInfo.reqGlEsVersion >= 0x20000
                    || (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")));
        if (supportsEs2) {
            // Request an OpenGL ES 2.0 compatible context.
            glSurfaceView.setEGLContextClientVersion(2);
            // Assign our renderer.
            glSurfaceView.setRenderer(new FirstOpenGLProjectRenderer());
            rendererSet = true;
        } else {
            Toast.makeText(this, "This device does not support OpenGL ES 2.0.",
            Toast.LENGTH_LONG).show();
            return;
        }
        setContentView(glSurfaceView);
    }    
    @Override
    protected void onPause() {
        super.onPause();
        if (rendererSet) {
            glSurfaceView.onPause();
        }
    }

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

package com.firstopenglproject.android;

import static android.opengl.GLES20.GL_COLOR_BUFFER_BIT;
import static android.opengl.GLES20.glClear;
import static android.opengl.GLES20.glClearColor;
import static android.opengl.GLES20.glViewport;

import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;

import android.opengl.GLSurfaceView.Renderer;

public class FirstOpenGLProjectRenderer implements Renderer {
    @Override
    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {

        glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
    }

    @Override
    public void onSurfaceChanged(GL10 glUnused, int width, int height) {
        // Set the OpenGL viewport to fill the entire surface.
        glViewport(0, 0, width, height);
    }

    /**
     * OnDrawFrame is called whenever a new frame needs to be drawn. Normally,
     * this is done at the refresh rate of the screen.
     */
    @Override
    public void onDrawFrame(GL10 glUnused) {
        // Clear the rendering surface.
        glClear(GL_COLOR_BUFFER_BIT);
    }
}