ListView's item - move on touch

StackOverflow https://stackoverflow.com/questions/20628419

  •  02-09-2022
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Question

I want to move each items of my listview by drag. I set OnTouch for listview and drag and drop items by set left and right margin. This is my procedure:

private void setLastViewDistance(float distanceX, View lastView) {
    if (lastView.getLayoutParams().getClass() == AbsListView.LayoutParams.class)
        lastView = ((ViewGroup) lastView).getChildAt(0);

    LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) lastView.getLayoutParams();
    lp.leftMargin = (int) distanceX;
    lp.rightMargin = -(int) distanceX;
    lastView.setLayoutParams(lp);
    lastView.postInvalidate();
}

But this code is slow motion in phone device. is any idea like setLeft(not work) setRight(not work) or...? thank you!

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Solution

It looks like this question is nearly the same as yours: android drag view smooth

Drag and drop in listview is somehow complicated... But there's a library for that (https://github.com/bauerca/drag-sort-listview) or you can read this drag and drop tutorial: http://www.vogella.com/articles/AndroidDragAndDrop/article.html

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