LinearLayout 如何动态设置 margin？
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(10, 20, 30, 40);
imageView.setLayoutParams(lp);
android中如何在代码中直接设置View的layout_weight属性
tvColu2.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT, 1.0f));