关于View的属性
自定义动态设置View的大小属性
使用LayoutParams来设置view的宽高.
int textLen = AddShopActivity.mCategoryItemNames1[type][textPos].length();
final int dimension = (int) (getResources().getDimension(R.dimen.text_size));
int left = dimension * textLen
+ (int) (getResources().getDimension(R.dimen.rl_left));
RelativeLayout.LayoutParams lp2 = new LayoutParams(left
+ (int) (getResources().getDimension(R.dimen.rl_right)),
(int) (getResources().getDimension(R.dimen.rl_height)));
lp2.setMargins(0, (int) (getResources().getDimension(R.dimen.rl_top)),
0, (int) (getResources().getDimension(R.dimen.rl_top)));
mRL01.setLayoutParams(lp2);
mDeleteBt = (Button) mRLMain.findViewById(R.id.deletebt);
MarginLayoutParams marginsParams = new MarginLayoutParams(
mDeleteBt.getLayoutParams());
marginsParams.setMargins(left, 0, 0, 0);
RelativeLayout.LayoutParams lp = new LayoutParams(marginsParams);
ViewGroup内部View的图层关系
bar.bringToFront();
在辛显龙Blog中是这样解释的： Android中的ViewGroup是通过一个Array来保存其Children，当调用某个childView的bringToFront时，是将该childView放在其Parent的Array数组的最后，ViewGroup的dispatchDraw在draw时是按照Array从前往后依次调用drawChild的，这样最后一个childView就在最前面了。