Android Studio no marked region found along edge found along top edge

For a variety of reasons, the 9 chart is not 9 chart format, but in eclipse will not error, in the Android studio will be error

Error:9-patch Image D:\download\avatar-android-master\avatar-android-master\sample\src\main\res\ Drawable-hdpi\abc_list_divider_holo_dark. 9 . png malformed.           Image must is at least 3x3 (1x1 without frame) pixels.:sample:mergedebugresources FAILED

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Regular anti-compilation students should be accustomed to this problem.

The solution is to draw a black line from the new tool.

Android Studio can also be easily plotted directly.

The one above is a mistake,

Must have a black line

Draw the line also has the skill, you move the mouse to the corner to turn the arrow to become <--> when click on it.

Android Studio no marked region found along edge found along top edge