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《HTML5与CSS3权威指南》范例及代码，共22章

[实例简介]Open GL 入门级示例 [实例截图] [核心代码]package com.china.gltry;import javax.microedition.khronos.egl.EGL10;import javax.microedition.khronos.egl.EGL11;import javax.microedition.khronos.egl.EGLConfig;import javax.microedition.khronos.egl.EGLContext;import javax.microedition.khronos.egl.EGLDisplay;import javax.microedition.khronos.egl.EGLSurface;import javax.microedition.khronos.opengles.GL;import android.view.SurfaceHolder;/** * An EGL helper class. */public class EGLHelper{ public EGLHelper() { } /** * Initialize EGL for a given configuration spec. * @param configSpec */ public void start(int[] configSpec){ /* * Get an EGL instance */ mEgl = (EGL10) EGLContext.getEGL(); /* * Get to the default display. */ mEglDisplay = mEgl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY); /* * We can now initialize EGL for that display */ int[] version = new int[2]; mEgl.eglInitialize(mEglDisplay, version); EGLConfig[] configs = new EGLConfig[1]; int[] num_config = new int[1]; mEgl.eglChooseConfig(mEglDisplay, configSpec, configs, 1, num_config); mEglConfig = configs[0]; /* * Create an OpenGL ES context. This must be done only once, an * OpenGL context is a somewhat heavy object. */ mEglContext = mEgl.eglCreateContext(mEglDisplay, mEglConfig, EGL10.EGL_NO_CONTEXT, null); mEglSurface = null; } /* * Create and return an OpenGL surface */ public GL createSurface(SurfaceHolder holder) { /* * The window size has changed, so we need to create a new * surface. */ if (mEglSurface != null) { /* * Unbind and destroy the old EGL surface, if * there is one. */ mEgl.eglMakeCurrent(mEglDisplay, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT); mEgl.eglDestroySurface(mEglDisplay, mEglSurface); } /* * Create an EGL surface we can render into. */ mEglSurface = mEgl.eglCreateWindowSurface(mEglDisplay, mEglConfig, holder, null); /* * Before we can issue GL commands, we need to make sure * the context is current and bound to a surface. */ mEgl.eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext); GL gl = mEglContext.getGL(); return gl; } /** * Display the current render surface. * @return false if the context has been lost. */ public boolean swap() { mEgl.eglSwapBuffers(mEglDisplay, mEglSurface); /* * Always check for EGL_CONTEXT_LOST, which means the context * and all associated data were lost (For instance because * the device went to sleep). We need to sleep until we * get a new surface. */ return mEgl.eglGetError() != EGL11.EGL_CONTEXT_LOST; } public void finish() { if (mEglSurface != null) { mEgl.eglMakeCurrent(mEglDisplay, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_SURFACE, EGL10.EGL_NO_CONTEXT); mEgl.eglDestroySurface(mEglDisplay, mEglSurface); mEglSurface = null; } if (mEglContext != null) { mEgl.eglDestroyContext(mEglDisplay, mEglContext); mEglContext = null; } if (mEglDisplay != null) { mEgl.eglTerminate(mEglDisplay); mEglDisplay = null; } } EGL10 mEgl; EGLDisplay mEglDisplay; EGLSurface mEglSurface; EGLConfig mEglConfig; EGLContext mEglContext;}

动态添加控件--超出导航屏幕

package com.hsx.imageloader.adapter;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import com.hsx.imageloader.listener.AnimateFirstDisplayListener;import com.nostra13.universalimageloader.core.DisplayImageOptions;import com.nostra13.universalimageloader.core.ImageLoader;import com.nostra13.universalimageloader.core.assist.ImageLoadingListener;import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;import com.hsx.imageloader.R;public class ItemAdapter extends BaseAdapter {DisplayImageOptions options;private ImageLoadingListener animateFirstListener = new AnimateFirstDisplayListener();String[] imageUrls;Context context;public ItemAdapter(String[] imageUrls, Context context) {super();this.imageUrls = imageUrls;this.context = context;options = new DisplayImageOptions.Builder().showStubImage(R.drawable.ic_launcher)//设置图片在下载期间显示的图片.showImageForEmptyUri(R.drawable.ic_launcher)//设置图片Uri为空或是错误的时候显示的图片.showImageOnFail(R.drawable.ic_launcher)//设置图片加载/解码过程中错误时候显示的图片.cacheInMemory(true)//是否緩存都內存中.cacheOnDisc(true)//是否緩存到sd卡上.displayer(new RoundedBitmapDisplayer(20)).build();}private class ViewHolder {public TextView text;public ImageView image;}@Overridepublic int getCount() {return imageUrls.length;}@Overridepublic Object getItem(int position) {return position;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(final int position, View convertView, ViewGroup parent) {final ViewHolder holder;if (convertView == null) {LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);convertView = inflater.inflate(R.layout.item_list_image, parent, false);holder = new ViewHolder();holder.text = (TextView) convertView.findViewById(R.id.text);holder.image = (ImageView) convertView.findViewById(R.id.image);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}holder.text.setText("Item " (position 1));// ImageLoaderImageLoader imageLoader = ImageLoader.getInstance();imageLoader.displayImage(imageUrls[position], holder.image, options, animateFirstListener);return convertView;}}

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