My answer may be a late one, but i hope that it'll deals with the actual reason and sure it could be helpful for those who are going to search about the same problem in future.
This type of errors,
1. Android Google Maps Failed to find style 'mapViewStyle' in current theme
2. Failed to find style 'imageButtonStyle' in current theme
3. Failed to find style 'editTextStyle' in current theme
4. Failed to find style 'textViewStyle' in current theme
Anything from the above list it may be,
We have selected the unavailable Theme for the layout.
The selected theme is not available in themes.xml file.
The selected theme is belongs to higher version sdk, but our current target sdk is lower one.
when you copy the whole layout file and try to implement it in your project.
a. Your may forgot to copy themes.xml file
b. You may have lower target sdk, the original layout created with higher target sdk.
(Open and View the layout file in the Graphical Layout View, and look at the top Right corner.
There your themes for the layout have been selected.)
So click the dropdown list for theme selection and choose the available themes according to your project themes and targeted sdk themes.
If the theme is a custom one , if you are required it , then copy the themes.xml file to your project from the source where you copied the layout xml file.
If the theme is sdk avail theme, if you are required it , then change your target according to your selected theme.
Hope,This might be helpful for somebody.
This is an exact copy of your answer stackoverflow.com/questions/8513278/. This issue is not related to the themes.xml, as the theme is inherited from the Maps API.