实现ScrollviewSupportMaxHeight

public class ScrollviewSupportMaxHeight extends ScrollView {
   
    public final int MAX_HEIGHT = 150;

    public ScrollviewSupportMaxHeight(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        measureChildren(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), measureHeight(heightMeasureSpec));
    }
   
    private int measureHeight(int heightMeasureSpec) {
        int size = 0;
        if(MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY) {
            size = getChildAt(0).getMeasuredHeight();
        } else {
            size = MeasureSpec.getSize(heightMeasureSpec);
        }
        return size > MAX_HEIGHT ? MAX_HEIGHT : size;
    }
}