学步园

// 当前视图顶部，底部，左侧，右侧与其他视图间填充区域

android:layout_marginTop
android:layout_marginBottom
android:layout_marginLeft
android:layout_marginRight

java代码设置

		RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		// 单位是px
		layoutParams.topMargin = 66;
		layoutParams.bottomMargin = 66;
		layoutParams.leftMargin = 66;
		layoutParams.rightMargin = 66;

// 当前视图内顶部，底部，左侧，右侧填充区域 (非RelativeLayout属性)

android:paddingTop
android:paddingBottom
android:paddingLeft
android:paddingRight

// 在指定ID视图上面，下面，左侧，右侧

android:layout_above
android:layout_below
android:layout_toLeftOf
android:layout_toRightOf

Java代码设置

		RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		
		layoutParams.addRule(RelativeLayout.ABOVE, R.id.viewId);
		layoutParams.addRule(RelativeLayout.BELOW, R.id.viewId);
		layoutParams.addRule(RelativeLayout.LEFT_OF, R.id.viewId);
		layoutParams.addRule(RelativeLayout.RIGHT_OF, R.id.viewId);

 
// 与制定ID视图baseLine，顶部，底部，左侧，右侧边缘对齐

android:layout_alignBaseline
android:layout_alignTop
android:layout_alignBottom
android:layout_alignLeft
android:layout_alignRight

Java代码设置

		RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		
		layoutParams.addRule(RelativeLayout.ALIGN_BASELINE, R.id.viewId);
		layoutParams.addRule(RelativeLayout.ALIGN_TOP, R.id.viewId);
		layoutParams.addRule(RelativeLayout.ALIGN_BOTTOM, R.id.viewId);
		layoutParams.addRule(RelativeLayout.ALIGN_LEFT, R.id.viewId);
		layoutParams.addRule(RelativeLayout.ALIGN_RIGHT, R.id.viewId);

// 与父视图顶部，底部，左侧，右侧边缘对齐

android:layout_alignParentTop
android:layout_alignParentBottom
android:layout_alignParentLeft
android:layout_alignParentRight

Java代码设置

		RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		
		layoutParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
		layoutParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
		layoutParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
		layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

// 横向居中，纵向居中，针对与父视图剧中

android:layout_centerHorizontal
android:layout_centerVertical
android:layout_centerInParent

Java代码设置

		RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		
		layoutParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
		layoutParams.addRule(RelativeLayout.CENTER_VERTICAL);
		layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT);

** Include 与 mege标签

参考资料：

Re-using Layouts with <include/>

Romain Guy   Android Layout Tricks #3: Optimize, Part 1

** ViewGroup相关配置

1. clipChildren

android:clipChildren setClipChildren(boolean)Defines whether a child is limited to draw inside of its bounds or not. 
定义是否限制子视图在它的范围内进行绘制。默认是true

2. clipToPadding
android:clipToPadding setClipToPadding(boolean)Defines whether the ViewGroup will clip its drawing surface so as to exclude the padding area. 
定义ViewGroup是否将剪切它的绘制界面并排除padding区域。默认是true

参考资料：

ViewGroup API

原文地址：http://blog.csdn.net/love_world_/article/details/8426935