• 02-Jan-2023
Lightrun Team
Author Lightrun Team
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This is a glossary of all the common issues in Google Flexbox Layout

Troubleshooting Common Issues in Google Flexbox Layout

Lightrun Team
Lightrun Team
02-Jan-2023

Project Description

Google’s Flexbox Layout is a graphical layout system for the Android operating system that is implemented in the Android Support Library. It is based on the CSS Flexible Box Layout Module, which is a layout system that provides a flexible way to lay out elements within a container.

Like the CSS Flexbox layout, Google’s Flexbox Layout allows developers to specify how to align and distribute space among elements within a container. It provides a number of properties that can be used to control the layout of elements, such as the flex-direction, align-items, and justify the content.

Google’s Flexbox Layout is particularly useful for building responsive layouts that work well on a variety of different screen sizes and device types. It is widely used in Android app development and is a key tool for building user interfaces that are flexible and adaptable to different device form factors and screen sizes.

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The following issues are the most popular issues regarding this project:

RecyclerView render issue if wrapped inside NestedScrollView

One solution to the issue of a RecyclerView not rendering correctly when it is wrapped inside a NestedScrollView is to use the NestedScrollingChildHelper class to manually dispatch touch events to the RecyclerView.

To do this, you can create a custom NestedScrollView that overrides the onTouchEvent and onInterceptTouchEvent methods and uses the NestedScrollingChildHelper to dispatch the touch events to the RecyclerView. Here’s an example of how you might do this:

public class CustomNestedScrollView extends NestedScrollView {
   private NestedScrollingChildHelper mChildHelper;

   public CustomNestedScrollView(Context context) {
       super(context);
       mChildHelper = new NestedScrollingChildHelper(this);
       setNestedScrollingEnabled(true);
   }

   @Override
   public boolean onTouchEvent(MotionEvent ev) {
       mChildHelper.startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL);
       boolean result = super.onTouchEvent(ev);
       mChildHelper.stopNestedScroll();
       return result;
   }

   @Override
   public boolean onInterceptTouchEvent(MotionEvent ev) {
       mChildHelper.startNestedScroll(ViewCompat.SCROLL_AXIS_VERTICAL);
       boolean result = super.onInterceptTouchEvent(ev);
       mChildHelper.stopNestedScroll();
       return result;
   }
}

You can then use this custom NestedScrollView in your layout instead of the regular NestedScrollView, and it should properly dispatch touch events to the RecyclerView.

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