从Android Launcher源码学习自定义标签【转】

res/values/attrs.xml <declare-styleable name="CellLayout"><!-- The width of a single cell --><attr name="cellWidth" format="dimension"></attr><!-- The height of a single cell --><attr name="cellHeight" format="dimension"></attr> ..... </declare-styleable> res/layout-port/workspace_screen.xml <com.android.launcher.celllayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher" android:layout_width="fill_parent" android:layout_height="fill_parent" launcher:cellwidth="80dip" launcher:cellheight="96dip" ....></com.android.launcher.celllayout> src/com.android.launcher.CellLayout.java public CellLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CellLayout, defStyle, 0); mCellWidth = a.getDimensionPixelSize(R.styleable.CellLayout_cellWidth, 10); mCellHeight = a.getDimensionPixelSize(R.styleable.CellLayout_cellHeight, 10); ..... } 根据颜色看, 应该很清晰: 1. 蓝色部分是自己定义的styleable和attr的名称, 代码和XML里要一致; 2. 绿色部分是自定义的命名空间名称, 也只要上下保持一致即可; 3. 红色部分是View所在的包名, 不允许有误. 参考:http://blog.youkuaiyun.com/Android_Tutor/archive/2010/04/21/5508615.aspx http://hi.baidu.com/lck0502/blog/item/8d4e453f80cf43cf7c1e714b.html