How to set a maximum height with wrap content in android?

Question

In android, how can you create a scroll view that\'s got a max height, and wrap contents, basically it wraps the content vertically, but has a maximum height?

I trie

Answer 1

1.) Create a class to handle setting maximum height to what is passed by the user:

public class OnViewGlobalLayoutListener implements ViewTreeObserver.OnGlobalLayoutListener {


private Context context;
private int maxHeight;
private View view;

public OnViewGlobalLayoutListener(View view, int maxHeight, Context context) {
    this.context = context;
    this.view = view;
    this.maxHeight = dpToPx(maxHeight);
}

@Override
public void onGlobalLayout() {
    if (view.getHeight() > maxHeight) {
        ViewGroup.LayoutParams params = view.getLayoutParams();
        params.height = maxHeight;
        view.setLayoutParams(params);
    }
}

public int pxToDp(int px) {
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    int dp = Math.round(px / (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    return dp;
}

public int dpToPx(int dp) {
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    int px = Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    return px;
}
}

2.) Attach this to the view and pass the maximum height in DP:

messageBody.getViewTreeObserver()
            .addOnGlobalLayoutListener(
             new OnViewGlobalLayoutListener(messageBody, 256, context)
             );

Thanks to @harmashalex for the inspiration. I made modifications to as setting the layout params didn't work by @harma's code. Also, dp-to-px conversion is necessary to offload wondering about it.