Android自定义ScrollView最大高度

MaxHeightScrollView.java

public class MaxHeightScrollView extends ScrollView {
    private int maxHeight;

    public MaxHeightScrollView(Context context) {
        super(context);
    }

    public MaxHeightScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
        if (!isInEditMode()) {
            init(context, attrs);
        }
    }

    public MaxHeightScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        if (!isInEditMode()) {
            init(context, attrs);
        }
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public MaxHeightScrollView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        if (!isInEditMode()) {
            init(context, attrs);
        }
    }

    private void init(Context context, AttributeSet attrs) {
        if (attrs != null) {
            TypedArray styledAttrs = context.obtainStyledAttributes(attrs, R.styleable.MaxHeightScrollView);
            //200 is a defualt value
            int DEFAULT_HEIGHT = 200;
            maxHeight = styledAttrs.getDimensionPixelSize(R.styleable.MaxHeightScrollView_max_height, DEFAULT_HEIGHT);

            styledAttrs.recycle();
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}

values/attr.xml

<declare-styleable name="MaxHeightScrollView">
    <attr name="max_height" format="dimension"/>
</declare-styleable>

转载自Stack Overflow：

layout - Android: why is there no maxHeight for a View? - Stack Overflow

原作者：SlickDev