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在列表视图中拖曳项目的问题
原标题:issues in dragging item in list view
  • 时间:2012-05-23 10:39:49
  •  标签:
  • android

我创建了一个 ListView 列表, 它包含一个项目列表。 列表视图中的每个项目都有不同的图像。 我想要的是拖放列表视图中的每个图像, 意味着我可以移动列表视图中的项目位置 。

我想做的是:

  1. 我可以将列表中的每个图像从一个位置拖放到另一个位置。

  2. 单击列表视图中每个图像后,我要打开一个对话框。

如何做到这一点?请帮我举个合适的例子。

最佳回答

看看下面的“强势”DragNDropListView

@Override
    public boolean onTouchEvent(MotionEvent ev) {
        final int action = ev.getAction();
        final int x = (int) ev.getX();
        final int y = (int) ev.getY();  

        if (action == MotionEvent.ACTION_DOWN && x < this.getWidth()/4) { 
            mDragMode = true;
        }

.

不使用上面的代码, 仅在列表视图中允许拖放 。

@Override
public boolean onTouchEvent(MotionEvent ev) {
    final int action = ev.getAction();
    final int x = (int) ev.getX();
    final int y = (int) ev.getY();

    int mWidth = this.getWidth() / 4;  //calculating the quarter part
    if (action == MotionEvent.ACTION_DOWN && x >= (mWidth * 2) && x < (mWidth * 3) ) {
        mDragMode = true;
    }

.

1) 无论 < 坚固> > < /坚固 > 值即将到来,你都需要检查它,就像要让拖放启用的地方一样。

2) To give a full privileged to user so that they can drag from any point of the lsit item use this

if (action == MotionEvent.ACTION_DOWN ) //don t check for x-position.
{
..
}

请看上面的代码

希望这能帮到你

@Anshuman 问得好

问题回答

检查 < a href=" "http://www.google.co.in/url?sa=t&rct=j&q=rag%20and%20dlop%20example%20in%20android%20and%2020listview%20echarlow&source=web&cd=3&ved=0CFKQFAC&url=http://ericharlow.blogspot.com/2010/10/经验-android-drag-and-droid-and-dropp-list.html&ei=jsK8T5D3ELSrQftorC1Dw&usg=AFQjEqVMKCVxrP0TSWxid3xUamp;cad=rja" rel="nofolt" > this < a a非常简单的例子。

他用过

private ArrayList<String> mContent; //in DragNDropAdapter class

您需要使用 < 强 > 图像 < / 强 >, 请在 < 强 > 整个软件包 < / 强 > 上自定义

private ArrayList<Image> mContent; //in DragNDropAdapter class




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