动态添加ImageView 设置setPadding不起作用问题

imageView.setLayoutParams(new LayoutParams(12,12)); 
imageView.setPadding(20, 0, 20, 0);

设置ImageView的setPadding(20, 0, 20, 0); 不起作用

改为

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(12, 12); 
params.setMargins(0, 0,13, 0); 
imageView = new ImageView(NavigationActivity.this); 
imageView.setLayoutParams(params);