自定义控件模仿SlidingDrawer，实现更好的效果

{"取色器","图片压缩","屏幕截图","放大镜","WebView_JS交互","PhoneGap","代码编辑器" ,"android 支持的系统级服务表 ","获取系统应用列表","图片左右滑动效果","图片左右滑动效果(带按钮)", "Android实现图表绘制和展示","断点续传下载","常用Intent.Action","图片缩放圆角倒影Bitmap/Drawable转换", "SlidingDrawer抽屉效果","Android顶部与底部菜单","GroupActivity测