使用 AChartEngine 库在安卓Android中创建图表

    使用SQLite缓存数据,缓存 大图片 小图片 文字 等信息

android的局域网聊天的android的局域网聊天的源代码源代码(LAN chat android' s source code)

通过开源的zx，来制作自己的二维码，实现自定义二维码和自定义扫描器，其中包含了扫描decode和encode，通过这个demon，改写自己的二维码

通过链接下载图片

Android 下拉列表选值初级实例，通过血型选择来练习下拉框的使用。 　　super.onCreate(savedInstanceState); 　　setContentView(R.layout.main); 　　m_TextView = (TextView) findViewById(R.id.TextView1); 　　m_Spinner = (Spinner) findViewById(R.id.Spinner1); 　　//将可选内容与ArrayAdapter连接 　　adapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item, m_Countries); 　　//设置下拉列表的风格 　　adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 　　//将adapter添加到m_Spinner中 　　m_Spinner.setAdapter(adapter); 　　//添加Spinner事件监听 　　m_Spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() { 　　 @Override 　　 public void onItemSelected(AdapterView arg0, View arg1, int arg2, long arg3) 　　 { 　　 m_TextView.setText("你的血型是：" + m_Countries[arg2]); 　　 //设置显示当前选择的项 　　 arg0.setVisibility(View.VISIBLE); 　　 } 　　});

纯java语言编写的水波现象，就是有点慢，希望后来者改进，达到更真实的效果，希望大家多多指教，里面附带有水波实现的推算，非常详细。。。。。。。。。。。。。。。。。。。。。。。。。。

[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;}

android 随机验证码 例子源码

AndEngine是一款Android平台的开源2D游戏引擎。著名的休闲游戏 Flappy Bird就是使用的该引擎开发。AndEngine基于libGDX框架开发，使用OpenGL ES进行图形绘制,底层使用C++编写,通过JNI调用来实现,因此比较高效,功能强大。同时集成了Box2D物理引擎，因此能实现一些较为复杂的物理效果。在Rokon(另一个Android 2D游戏引擎)宣布停止更新以后，AndEngine成为Android最为流行的2D游戏引擎。相较Libgdx引擎：AndEngine拥有更多的游戏组件与扩展功能；并且它在默认情况下已经可以支持中文；采用屏幕坐标系绘也更符合一般Android绘图习惯。