This post introduce basic setup for opencv project dev in google glass, which can be taken as a tutorial for google glass opencv4android in android studio.
Environment: OpenCV4Android 2.4.9, android studio 0.8.9, java 1.8, java sdk API level 20, Glass Dev Kit Preview 19. We assume that environment has already been setup or downloaded.
The current stable verion is 2.4.9. You can get it here.. After you extract it, you can see folder structures. In the
apk folder, you need to install the
OpenCV_2.4.9_Manager_2.18_armv7a-neon.apk which is the compatiable OpenCV Manager version for google glass.
This OpenCV Manager works as a service in the android system, to provide service to opencv apps. More explanations .
Create a Google Glass Project
Current version android studio provide a bootstrap dialog for you to create a google glass project, just remember to select the glass sdk at the second page, and you only select phone sdk when you need a phone module in your project. I suggest you to pick the
Immersive rather than
livecard for activity style.
At the time this post was written, the API level for google glass is
Glass Development Kit Preview API level 19. Thus the
minSdkVersion in your
build.gradle should be 19, and the
compileSdkVersion should be
'Google Inc.:Glass Development Kit Preview:19'(This should be automatic taken care of, if you have the latest android studio.).
This automatically generated code in the main activity may not suit your usage. You may need rewrite all of theHowever, the next step before you start to code your OpenCV project, is to import OpenCV library to your current project. You can do this by
import module the path as
/path to/OpenCV-2.4.9-android-sdk/sdk/java. After the import, you need manually edit the
build.gradle file for this module
openCVLibrary249, to make it smiliar as the main project module as following:
Then you need go to your main module setting to make the
openCVLibrary249 to be the dependency of the project module.
After this, you can see that the dependencies part in your main module should be
Now you can start to work on your opencv project on Google Glass. Have fun !
Update: some error may come with automatically generated top-level
build.gradle file which is in the root level of the project. Please keep it clean with no top-level dependency declared.