Android判斷view在屏幕可見

/**
 * 判斷當前view是否在屏幕可見
 */
public static boolean getLocalVisibleRect(Context context, View view, int offsetY) {
    Point p = new Point();
    ((Activity) context).getWindowManager().getDefaultDisplay().getSize(p);
    int screenWidth = p.x;
    int screenHeight = p.y;
    Rect rect = new Rect(0, 0, screenWidth, screenHeight);
    int[] location = new int[2];
    location[1] = location[1] + UIUtils.dip2px(context, offsetY);
    view.getLocationInWindow(location);
    view.setTag(location[1]);//存儲y方向的位置
    if (view.getLocalVisibleRect(rect)) {
        return true;
    } else {
        return false;
    }
}

經常配合滑動事件使用

scrollView.setOnScrollListener(new ObservableScrollView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(ObservableScrollView view, int scrollState) {
                
            }

            @Override
            public void onScroll(ObservableScrollView view, boolean isTouchScroll, int l, int t, int oldl, int oldt) {
                
            }
        });

    }