android动态修改布局

LinearLayout.LayoutParams linearParams =(LinearLayout.LayoutParams) textView.getLayoutParams(); //取控件textView当前的布局参数 linearParams.height = 20;// 控件的高强制设成20
 

linearParams.width = 30;// 控件的宽强制设成30   

textView.setLayoutParams(linearParams); //使设置好的布局参数应用到控件

RelativeLayout.LayoutParams lp = (LayoutParams) logo.getLayoutParams();
// 如果没有水平居中，说明是软键盘收起，否则是开始时的初始化或者因为此处if条件里的语句修改控件导致的再次布局，忽略掉，否则无限循环
if (lp.getRules()[RelativeLayout.CENTER_HORIZONTAL] == 0) {
// 居中Logo
lp.addRule(RelativeLayout.CENTER_HORIZONTAL);
lp.addRule(RelativeLayout.ALIGN_PARENT_LEFT, 0);

// 还原Logo为原来大小
int height = logo.getHeight();
int width = logo.getWidth();
lp.width = width * 2;
lp.height = height * 2;
logo.setLayoutParams(lp);

// Logo下的文字
RelativeLayout.LayoutParams labelParams = (LayoutParams) label.getLayoutParams();
labelParams.addRule(RelativeLayout.CENTER_HORIZONTAL); // 设置水平居中
labelParams.addRule(RelativeLayout.BELOW, R.id.logo); // 设置显示到Logo下面
labelParams.addRule(RelativeLayout.RIGHT_OF, 0); // 取消显示到Logo右面
labelParams.addRule(RelativeLayout.CENTER_VERTICAL, 0); // 取消垂直居中
label.setLayoutParams(labelParams);