opengl.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.app.Activity;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Toast;

public class OpenGL extends Activity {
	
	public static final int TYPE_CUBE = 100;
	   public static final int TYPE_RECTANGLE = 101;
	   
	   private static final int MENU_CUBE = Menu.FIRST + 1;
	   private static final int MENU_RECTANGLE = MENU_CUBE + 1;
	   
	   private GLView cube_view;
	   private GLView rectangle_view;
	   
	   @Override
	   public void onCreate(Bundle savedInstanceState) {
	      super.onCreate(savedInstanceState);
	      
	      startRectangle();
	   }
	   
	   private void startCube() {
		   
		   //if ( rectangle_view != null )
		   //	   rectangle_view.surfaceDestroyed(rectangle_view.getHolder());
		   
		   cube_view = new GLView(this, TYPE_CUBE);
		   cube_view.setOnClickListener(new OnClickListener () {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
		        Toast.makeText(v.getContext(),"Click Cube",Toast.LENGTH_SHORT).show();
			}
	    	  
	      });
		  cube_view.getHolder().setFormat(PixelFormat.TRANSPARENT);
		  cube_view.setOnTouchListener(mcubeTouchListener);
	      setContentView(cube_view);
	      
	   }
	   
	   private void startRectangle() {
		   
		   //if ( cube_view != null )
		//	   cube_view.surfaceDestroyed(cube_view.getHolder());
		   
		   rectangle_view = new GLView(this, TYPE_RECTANGLE);
		   rectangle_view.setOnClickListener(new OnClickListener () {
           
				@Override
				public void onClick(View v) {
					// TODO Auto-generated method stub
			        Toast.makeText(v.getContext(),"Click Rectangle",Toast.LENGTH_SHORT).show();
				}
		    	  
		      });
		   
	    	//rectangle_view.setOnTouchListener(mrectangleTouchListener);
		      rectangle_view.getHolder().setFormat(PixelFormat.TRANSLUCENT);
		      setContentView(rectangle_view);
	   }
	   
	   @Override
	   public boolean onCreateOptionsMenu(Menu menu) {

	       super.onCreateOptionsMenu(menu);
	       
	       menu.add(0, MENU_CUBE, 0, R.string.menu_cube)
	                .setIcon(R.drawable.ic_menu_gallery)
	                .setAlphabeticShortcut('C');

	       menu.add(0, MENU_RECTANGLE, 0, R.string.menu_rectangle)
	       			.setIcon(R.drawable.ic_menu_gallery)
	       			.setAlphabeticShortcut('C');
	       
	       return true;
	   }
	   
	   @Override
	   public boolean onOptionsItemSelected(MenuItem item) {
	       switch (item.getItemId()) {
	           case MENU_CUBE:
	               startCube();
	               return true;
	           case MENU_RECTANGLE:
	        	   startRectangle();
	               return true;
	       }
	       return super.onOptionsItemSelected(item);
      }
	   
	   private View.OnTouchListener mcubeTouchListener = new View.OnTouchListener(){
		   Point start, last;  
		@Override
		public boolean onTouch(View arg0, MotionEvent arg1) {
			// TODO Auto-generated method stub
			final int action = arg1.getAction();
             
     		final float x = arg1.getX();
     		final float y = arg1.getY();

     		switch (action) {
    		case MotionEvent.ACTION_DOWN:
    		 Log.e("a222302" ,"OnTouchListener ACTION_DOWN");
    		 start = new Point((int)x, (int)y);
 			 last = start;
    		 cube_view.getThread().setRunning(false);
    		 break;
    		case MotionEvent.ACTION_MOVE:
    			float angle0 = Math.abs(Math.abs((last.x - start.x) / 2f % 90) - 45);
     			float angle1 = Math.abs(Math.abs((x - start.x) / 2f % 90) - 45);
    			 
    			 //cube_view.scrollBy(20, 0);
    			 last = new Point((int)x, (int)y);
    			 break;
    		case MotionEvent.ACTION_UP: 
    			 Log.e("a222302" ,"OnTouchListener ACTION_UP");
    			 cube_view.getThread().setRunning(true);
    			break;
			}
			return false;
		}
	   
};
}