Execution failed for task ': App:dexdebug '.

Possible problems and solutions (organized from http://bbs.csdn.net/topics/391006536):

1. If it is a first-lap environment, the operation fails. This may be the reason why the installation package path has spaces.
2. If the previous operation of the project is normal, the landlord marked the red part, I do not know where the problem. But just look at the title of the problem, there are some because the project path for the Chinese character (I met today, the project to a full English path on it)

3. Remove the unwanted jar package, and focus on troubleshooting ANDROID.SUPPORT:APPCOMPAT-V7 and COM.ANDROID.SUPPORT:SUPPORT-V4 packages this has to be imported using the Compile method.

The underlying principle is to be explored.

Execution failed for task ': App:dexdebug '.