【Android】日常记录：ScrollView嵌套ListView

MyScrollView.java

public class MyScrollView extends ScrollView {

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

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            onTouchEvent(ev);
            return false;
        }
        return true;
    }
}

MyListView.java

public class MyListView extends ListView {

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

    private float lastY;

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            getParent().getParent().requestDisallowInterceptTouchEvent(true);
        } else if (ev.getAction() == MotionEvent.ACTION_MOVE) {
            if (lastY > ev.getY()) {
                // 如果是向上滑动，且不能滑动了，则让ScrollView处理
                if (!canScrollList(1)) {
                    getParent().getParent().requestDisallowInterceptTouchEvent(false);
                    return false;
                }
            } else if (ev.getY() > lastY) {
                // 如果是向下滑动，且不能滑动了，则让ScrollView处理
                if (!canScrollList(-1)) {
                    getParent().getParent().requestDisallowInterceptTouchEvent(false);
                    return false;
                }
            }
        }
        lastY = ev.getY();
        return super.dispatchTouchEvent(ev);
    }

}