Get a warning when creating an Android project using eclipse

The warning message is as follows:

[2014-12-06 11:41:59-appcompat_v7] Warning:unable to write Jarlist cache File/home/fuhd/work/workspace/android/appcompat_v7/bin/jarlist.cache

When you create an Android project, the minimum requirements for the SDK are not selected (by default). After you create the project, a Appcompat_v7 folder appears. To the Appcompat_v7/bin directory, you can not find jarlist.cache files, legends to refresh the Appcompat_v7 file only (for the Jarlist.cache is unclear so, do not know what to use, which is seen from the foreign website).

Why appears Appcompat_v7 folder, foreigner explanation:

The Appcompat_v7 folder is added because your use of an action bar component.

What does this have to do with our warning above? The foreigner said, the minimum version of the Support SDK was adjusted to 14, it was resolved. Not only will appcompat_v7 not appear, but warnings will not be:

<USES-SDK android:minsdkversion= "android:targetsdkversion="/>

Get a warning when creating an Android project using eclipse