👀 Views: 56 💬 Answers: 1 📅 Created: 2025-06-05

android custom-view viewgroup layout Java

I'm trying to figure out I'm collaborating on a project where I've been struggling with this for a few days now and could really use some help. I keep running into I'm facing an issue when trying to implement a custom `ViewGroup` for a complex layout in Android 14. My custom `ViewGroup` overrides the `onMeasure` method to calculate its size based on the children's dimensions. However, when I set the layout parameters, the `ViewGroup` does not seem to measure its children correctly. Instead, it appears to collapse to zero height. Here's the code I've implemented: ```java public class CustomLayout extends ViewGroup { public CustomLayout(Context context) { super(context); } public CustomLayout(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width = MeasureSpec.getSize(widthMeasureSpec); int height = 0; // Initialize height // Measure children for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); measureChild(child, widthMeasureSpec, heightMeasureSpec); height += child.getMeasuredHeight(); // Aggregate height } setMeasuredDimension(width, height); } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { int currentTop = 0; for (int i = 0; i < getChildCount(); i++) { View child = getChildAt(i); child.layout(left, currentTop, right, currentTop + child.getMeasuredHeight()); currentTop += child.getMeasuredHeight(); } } } ``` I've also ensured that I'm using `wrap_content` for the height in the layout XML. The strange thing is that when I log the measured dimensions in `onMeasure`, it shows the correct values, but the view is not rendered properly in the UI. I've tried calling `requestLayout()` after measuring, but it doesn't seem to help. Additionally, I noticed that if I remove all child views, the `ViewGroup` still collapses, which leads me to believe there might be an issue with how I’m handling the measuring logic. The only error I see in the logcat is `View not laid out correctly`. What could I be missing here? Any guidance on ensuring that my custom layout measures and lays out its children correctly would be greatly appreciated. What's the correct way to implement this? This is happening in both development and production on Windows 10. Any advice would be much appreciated. I'm working on a REST API that needs to handle this. Any ideas what could be causing this? What are your experiences with this?