筆記記錄

/**
 * @packageName:com.huidaxuan.ic2cloud.app2b.view.diy.scrollview
 * @className: MyScrollViewClearLinstener
 * @description:設(shè)置子view試圖滑動沖突
 * @author: dingchao
 * @time: 2020-06-28 09:41
 */
/*ScrollView低版本適配*/
public class MyScrollViewClearListener extends ScrollView {
    private OnScrollChanged mOnScrollChanged;

    private HorizontalListView horizontalListView;


    public MyScrollViewClearListener(Context context) {
        this(context, null);
    }

    public MyScrollViewClearListener(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public MyScrollViewClearListener(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {

    }

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);
        if (mOnScrollChanged != null)
            mOnScrollChanged.onScroll(l, t, oldl, oldt);

        View view = this.getChildAt(0);
        if (this.getHeight() + this.getScrollY() == view.getHeight()) {
            _calCount++;
            if (_calCount == 1) {
                if (_listener != null) {
                    _listener.srollToBottom();

                }

            }
        } else {
            _calCount = 0;

        }
    }

    public void setOnScrollChanged(OnScrollChanged onScrollChanged) {
        this.mOnScrollChanged = onScrollChanged;
    }

    public interface OnScrollChanged {
        void onScroll(int l, int t, int oldl, int oldt);
    }


    /**
     * 接口回調(diào)
     */
    private ScrollViewListener scrollViewListener = null;

    public interface ScrollViewListener {
        void onScrollChanged(MyScrollViewClearListener scrollView, int x, int y,
                             int oldx, int oldy);

    }

    public void setScrollViewListener(ScrollViewListener scrollViewListener) {
        this.scrollViewListener = scrollViewListener;
    }

    /**
     * 重寫的onScrollChanged方法監(jiān)聽坐標
     * 這個監(jiān)聽在源碼中沒有寫成回調(diào)的樣子葡兑，
     * 只是寫成了方法的樣子，由于修飾這個方法的修飾符是protected，
     * （protected只能在本類损话，子類岔擂，同一包中調(diào)用）玲昧，
     * 所以拿到ScrollView對象后在無法activity中調(diào)用此方法耙饰，
     * 所以只能重寫后摩瞎，子類中自動調(diào)用拴签，
     * 所以要想在activity調(diào)用，
     * 就要寫回調(diào)愉豺，
     * 上面就是我寫的回調(diào)
     * 在Android源碼中這種寫法很多篓吁，在很多控件中都有
     */
//    @Override
//    protected void onScrollChanged(int x, int y, int oldx, int oldy) {
//        super.onScrollChanged(x, y, oldx, oldy);
//        if (scrollViewListener != null) {
//            scrollViewListener.onScrollChanged(this, x, y, oldx, oldy);
//        }
//    }


    //滑動到底部監(jiān)聽添加
    private OnScrollBottomListener _listener;
    private int _calCount;

    public interface OnScrollBottomListener {
        void srollToBottom();
    }

    public void registerOnScrollViewScrollToBottom(OnScrollBottomListener l) {
        _listener = l;
    }

    public void unRegisterOnScrollViewScrollToBottom() {
        _listener = null;
    }


    /**
     * 覆寫onInterceptTouchEvent方法，點擊操作發(fā)生在ListView的區(qū)域的時候,
     * 返回false讓ScrollView的onTouchEvent接收不到MotionEvent蚪拦，而是把Event傳到下一級的控件中
     */
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        if (horizontalListView != null && checkArea(horizontalListView, ev)) {
            return false;
        }
        return super.onInterceptTouchEvent(ev);
    }

    /**
     * 測試view是否在點擊范圍內(nèi)
     * 還差豎向滑動的判斷不完美（后續(xù)完善杖剪，不影響用戶觸摸操作）
     *
     * @param v
     * @return
     */
    private boolean checkArea(View v, MotionEvent event) {
        float x = event.getRawX();
        float y = event.getRawY();
        int[] locate = new int[2];
        v.getLocationOnScreen(locate);
        int l = locate[0];
        int r = l + v.getWidth();
        int t = locate[1];
        int b = t + v.getHeight();
        if (l < x && x < r && t < y && y < b) {
            return true;
        }
        return false;
    }

    public HorizontalListView getHorizontalListView() {
        return horizontalListView;
    }

    public void setHorizontalListView(HorizontalListView horizontalListView) {
        this.horizontalListView = horizontalListView;
    }
}

使用

//設(shè)置去除在scrollview中hlv的滑動監(jiān)聽影響
        msv_home.setHorizontalListView(hlv_menu);