How does Android solve the problem of blacklist when dragging listview?

Recently, listview is used to display some string data. It is found that if you do not hold down the text part and drag the listview, everything is fine, but if you hold down the text part, all the text parts will become black.
The solution is actually very simple. The root cause of the problem is the cache color. There are two methods:

1. In the layout XML file
Add the following attributes to listview.

Android: cachecolorhint = "#00000000 ″

2.Code, Use the setcachecolorhint Method for listview. // Http://www.my400800.cn

1 LV. setcachecolorhint (color. Transparent );

Note: when using the code, you cannot use LV. setbackgroundcolor (color. Transparent) to set the background color of the LV to transparent. Otherwise, it will not work.