动态设置控件边距

ImageView mImageButton = (ImageView)findViewById(R.id.xxx);

相对布局中：

RelativeLayout.LayoutParams myButtonParams = (RelativeLayout.LayoutParams) mImageButton.getLayoutParams();

myButtonParams.rightMargin = 120;

线性布局中：

LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mImageButton.getLayoutParams();

lp.leftMargin = 120;

mImageButton.setLayoutParams(myButtonParams);//(lp);