Android and android Official Website

Android and android Official Website

We can usually set margin directly in xml, such:

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

However, in some cases, it needs to be written in java code, but the View itself does not have the setMargin method. What should I do?

After reading the android api, we found that android. view. ViewGroup. MarginLayoutParams has a setMargins (left, top, right, bottom) method ).

Its direct subclasses include: FrameLayout. LayoutParams, LinearLayout. LayoutParams and RelativeLayout. LayoutParams.

Usage:

LinearLayout. layoutParams lp = new LinearLayout. layoutParams (LinearLayout. layoutParams. WRAP_CONTENT, LinearLayout. layoutParams. WRAP_CONTENT); lp. setMargins (10, 20, 30, 40); imageView. setLayoutParams (lp );

If this method does not work, you can use the control that needs to modify margin, such as the previous imageView. There is a getLayout method, and the obtained layout can be strongly converted to LinearLayout or another type, then set the margin.

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