int start, int before, int count) {
//这里的s就是输入框之后之中的内容
if(s.toString().isEmpty()){
//这里的setLayoutParams...方法就是设置一个控件大小的方法,LayoutParams(width,heigh,weight)
bt1.setLayoutParams(new LinearLayout.LayoutParams...(100, 100, 0));
bt2.setLayoutParams(new LinearLayout.LayoutParams(0, 0, 0.0f));...}
else{
bt2.setLayoutParams(new LinearLayout.LayoutParams(100, 100, 0));...bt1.setLayoutParams(new LinearLayout.LayoutParams(0, 0, 0.0f));
}