Theme. AppCompat. Light. Darkactionbar not found

problem ： 

Due to the update Android Of sdk, Prompt after opening the previous project Theme.AppCompat.Light.DarkActionBar The theme cannot be found .

reason ：

SDK After the update , The catalogue of topics may change in the new version , So there is a problem that cannot be found .

solve ：

Delete the previously imported V7 package , Re import the new version v7, And then in style Modify the theme inside  Theme.AppCompat.Light.DarkActionBar that will do .

How to modify the theme ：

modify parent value , With  @android:style/   start , Find a new theme that is close to the original theme and clean Just click on the project .

The above is the solution process when I can't find resources such as themes , Leave this article hoping to help other friends ...