Android的XML属性编程

Question

我改变我的按钮的风格是这样的：

RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)btBroadcast.getLayoutParams(); 
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); 
params.addRule(RelativeLayout.CENTER_VERTICAL); 
btBroadcast.setLayoutParams(params); 

如何添加上述这四个规则是什么？

android:layout_marginRight="16dp" 
android:scaleType="centerInside" 
android:layout_width="20" 
android:layout_height="20" 

Answer 1

RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)btBroadcast.getLayoutParams(); 
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); 
params.addRule(RelativeLayout.CENTER_VERTICAL); 
params.height = 10; 
params.width = 20; 
params.rightMargin = 10; 
btBroadcast.setScaleType(ImageView.ScaleType.CENTER); 
btBroadcast.setBackgroundResource(R.drawable.image); 
btBroadcast.requestLayout();