如何使用代码而不是 xml 设置 ImageView 的边距

How to set margin of ImageView using code, not xml(如何使用代码而不是 xml 设置 ImageView 的边距)

问题描述

我想将未知数量的 ImageView 视图添加到我的布局中并带有边距.在 XML 中，我可以像这样使用 layout_margin:

I want to add an unknown number of ImageView views to my layout with margin. In XML, I can use layout_margin like this:

<ImageView android:layout_margin="5dip" android:src="@drawable/image"/>

有ImageView.setPadding()，但没有ImageView.setMargin().我认为它与 ImageView.setLayoutParams(LayoutParams) 类似，但不知道该输入什么.

There is ImageView.setPadding(), but no ImageView.setMargin(). I think it's along the lines of ImageView.setLayoutParams(LayoutParams), but not sure what to feed into that.

有人知道吗?

推荐答案

android.view.ViewGroup.MarginLayoutParams 有一个方法 setMargins(left, top, right, bottom).直接子类是:FrameLayout.LayoutParams、LinearLayout.LayoutParams 和 RelativeLayout.LayoutParams.

android.view.ViewGroup.MarginLayoutParams has a method setMargins(left, top, right, bottom). Direct subclasses are: FrameLayout.LayoutParams, LinearLayout.LayoutParams and RelativeLayout.LayoutParams.

使用例如线性布局:

LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(left, top, right, bottom);
imageView.setLayoutParams(lp);

MarginLayoutParams

这会以像素为单位设置边距.要扩展它，请使用

This sets the margins in pixels. To scale it use

context.getResources().getDisplayMetrics().density

DisplayMetrics

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