使用幻灯片删除项目列表视图 - 就像 Gmail [英] Remove item listview with Slide - Like Gmail

问题描述

我正在开发一个带有列表视图中的商店列表的应用程序.我需要当我向右(或向左)滑动 listview 的项目时，这个项目应该从列表视图中删除.

I am developing an application with a shop list in a listview. I need that when I swipe the item of listview to the right(or left), this item should get deleted from the listview.

我有我的列表视图，只需要函数来完成它.

I have my listview and only need the function to do it.

提前致谢.

推荐答案

我就是这样实现这个效果的.我们有一个 ListView lvSimple 并且我们将 onTouchListener 添加到我们的 lvSimple.这是我的工作代码.

This is how I realize this effect. We have a ListView lvSimple and we add onTouchListener to our lvSimple. This is my working code.

float historicX = Float.NaN, historicY = Float.NaN;
static final int DELTA = 50;
enum Direction {LEFT, RIGHT;}
...
ListView lvSimple = (ListView) findViewById(R.id.linLayout);
...
lvSimple.setOnTouchListener(new OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {

        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                historicX = event.getX();
                historicY = event.getY();
                break;

            case MotionEvent.ACTION_UP:
                if (event.getX() - historicX < -DELTA) {
                    FunctionDeleteRowWhenSlidingLeft();
                    return true;
                }
                else if (event.getX() - historicX > DELTA) {
                    FunctionDeleteRowWhenSlidingRight();
                    return true;
                }
                break;

            default:
                return false;
        }
        return false;
    }
});

其中函数 FunctionDeleteRowWhenSlidingLeft() 在我们向左滑动时调用，FunctionDeleteRowWhenSlidingRight() - 分别向右滑动.在此功能中，您需要粘贴动画代码.

where function FunctionDeleteRowWhenSlidingLeft() is calling when when we sliding to the left, FunctionDeleteRowWhenSlidingRight() - to the right respectively. In this function you need paste code for animation.

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