glview.java

android 下学习openGL的一个不错demo

/***
 * Excerpted from "Hello, Android!",
 * published by The Pragmatic Bookshelf.
 * Copyrights apply to this code. It may not be used to create training material, 
 * courses, books, articles, and the like. Contact us if you are in doubt.
 * We make no guarantees that this code is fit for any purpose. 
 * Visit http://www.pragmaticprogrammer.com/titles/eband for more book information.
***/

package com.mot.opengl;

import android.content.Context;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;

class GLView extends SurfaceView implements SurfaceHolder.Callback {
   
   private final String TAG = "GLView";
   private GLThread glThread;
   private int type;
   
   GLView(Context context, int type) {
      super(context);
      this.type = type;

      // Install a SurfaceHolder.Callback so we get notified when
      // the underlying surface is created and destroyed
      getHolder().addCallback(this);
      
      // Use hardware acceleration if available
      getHolder().setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
   }

   
   public void surfaceCreated(SurfaceHolder holder) {
      
      // The Surface has been created so start our drawing thread
	   Log.e(TAG,"surfaceCreated");
      glThread = new GLThread(this,type);
      glThread.setRunning(true);
      glThread.start();
      
   }

   public void surfaceDestroyed(SurfaceHolder holder) {
	   Log.e(TAG,"surfaceDestroyed");
      // Stop our drawing thread. The Surface will be destroyed
      // when we return
	   glThread.setRunning(false);
      glThread.requestExitAndWait();
      glThread = null;
      
   }
   

   public void surfaceChanged(SurfaceHolder holder, int format,
         int w, int h) {
	   Log.e(TAG,"surfaceChanged");
      // TODO: handle window size changes
   }
   public GLThread getThread() {
       return glThread;
   }
}