float vertexArray[] = {-0.8f, -0.4f * 1.732f, 0.0f,0.0f, -0.4f * 1.732f, 0.0f,-0.4f, 0.4f * 1.732f, 0.0f,0.0f, -0.0f * 1.732f, 0.0f,0.8f, -0.0f * 1.732f, 0.0f,0.4f, 0.4f * 1.732f, 0.0f,
};

public void DrawScene(GL10 gl) {super.DrawScene(gl);ByteBuffer vbb= ByteBuffer.allocateDirect(vertexArray.length*4);vbb.order(ByteOrder.nativeOrder());FloatBuffer vertex = vbb.asFloatBuffer();vertex.put(vertexArray);vertex.position(0);gl.glLoadIdentity();gl.glTranslatef(0, 0, -4);gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertex);index++;index%=10;switch(index){case 0:case 1:case 2:gl.glColor4f(1.0f, 0.0f, 0.0f, 1.0f);gl.glDrawArrays(GL10.GL_TRIANGLES, 0, 6);break;case 3:case 4:case 5:gl.glColor4f(0.0f, 1.0f, 0.0f, 1.0f);gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 6);break;case 6:case 7:case 8:case 9:gl.glColor4f(0.0f, 0.0f, 1.0f, 1.0f);gl.glDrawArrays(GL10.GL_TRIANGLE_FAN, 0, 6);break;}gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);}

package com.example.gltest;import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;import javax.microedition.khronos.opengles.GL10;import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.Window;
import android.view.WindowManager;public class MainActivity extends Activityimplements IOpenGLDemo{float vertexArray[] = {-0.8f, -0.4f * 1.732f, 0.0f,-0.4f, 0.4f * 1.732f, 0.0f,0.0f, -0.4f * 1.732f, 0.0f,0.4f, 0.4f * 1.732f, 0.0f,};/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);this.requestWindowFeature(Window.FEATURE_NO_TITLE);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);mGLSurfaceView = new GLSurfaceView(this);mGLSurfaceView.setRenderer(new OpenGLRenderer(this));setContentView(mGLSurfaceView);}//        public void DrawScene(GL10 gl) {
//            gl.glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
//            // Clears the screen and depth buffer.
//            gl.glClear(GL10.GL_COLOR_BUFFER_BIT
//              | GL10.GL_DEPTH_BUFFER_BIT);
//
//        }public void DrawScene(GL10 gl) {//super.DrawScene(gl);
             ByteBuffer vbb= ByteBuffer.allocateDirect(vertexArray.length*4);vbb.order(ByteOrder.nativeOrder());FloatBuffer vertex = vbb.asFloatBuffer();vertex.put(vertexArray);vertex.position(0);gl.glLoadIdentity();gl.glTranslatef(0, 0, -4);gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertex);int index = 0;index ++;index%=10;switch(index){case 0:case 1:case 2:gl.glColor4f(1.0f, 0.0f, 0.0f, 1.0f);gl.glDrawArrays(GL10.GL_TRIANGLES, 0, 6);break;case 3:case 4:case 5:gl.glColor4f(0.0f, 1.0f, 0.0f, 1.0f);gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 6);break;case 6:case 7:case 8:case 9:gl.glColor4f(0.0f, 0.0f, 1.0f, 1.0f);gl.glDrawArrays(GL10.GL_TRIANGLE_FAN, 0, 6);break;}gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);}@Overrideprotected void onResume() {// Ideally a game should implement// onResume() and onPause()// to take appropriate action when the//activity looses focus
            super.onResume();mGLSurfaceView.onResume();}@Overrideprotected void onPause() {// Ideally a game should implement onResume()//and onPause()// to take appropriate action when the//activity looses focus
            super.onPause();mGLSurfaceView.onPause();}private GLSurfaceView mGLSurfaceView;}