-
Notifications
You must be signed in to change notification settings - Fork 1
Build for Android
-
Clone the GIT repository into a directory of your choice
-
Install the latest CMake. You need at least CMake Version 3.3.
-
Install the Android Studio:
- from developer.android.com
- Install with all options left as default.
- Remember where the Android SDK gets installed (e.g. c:\Users???\AppData\Local\Android\sdk)
- or with JetBrains Toolbox:
- On the Welcome Screen choose first More Actions > SDK Manager to install first the latest Android SDK.
- from developer.android.com
-
Startup Android Studio and choose Import project (Eclipse ADT, Gradle, etc.)
- Choose the build.gradle file in the folder apps/app-Demo-SLProject/android
-
The SLProject demo app targets the Android SDK 24 (= Android 6.0)
- If not installed the IDE gives you a link for all missing SDK versions.
- The min. SDK needed is 21 (Android 5.0)
-
The SLProject uses the Android NDK (native development kit). If not installed:
- Open the SDK manager with Tools > SDK Manager
- Select the tab SDK Tools
- Check the NDK option and click Apply
- Check also the Google USB Driver option and click Apply
- If the missing NDK error is still present, restart Android Studio and install possibly new package updates.
-
Build the project with Hammer button or with Build > Make Project (Ctrl-F9)
- The app can only run on real but not on virtual devices because the prebuilt OpenCV libraries (_lib/prebuilt/Android) are only built for the arm architectures armeabi-v7a and arm64-v8a. To run the app in a virtual device you would have to build OpenCV also for Android on the x86 architecture.
-
After a successful build you can start the app on a USB-connected device by clicking the green start button.
- If your device is not listed in the Deployment Targets dialog please check again your USB driver. In some cases, you have to download the appropriate driver from the device manufacturer.
-
Release Build:
-
Click on the left border the Build Variants tab.
-
Set the Active Build Variant to release.
-
in build.gradle edit the signingConfigs to set the password of the SLProject keystore.
signingConfigs {
release { keyAlias 'slproject-release-key' keyPassword '....' // Change to your key password storeFile file('../slproject-release-key') storePassword '....' // Change to your store password }
}
-
Choose Build -> Build bundle -> Build APK
Another way is to generate a new KeyStore
- Choose Build > Generate Signed Bundle or APK and select APK.
- Create or choose a signed keystone file in a secure file location.
- Fill in the Key store password, Key alias and Key password and click Next.
- Choose release and press Create. The APK gets signed and written to the destination folder.
- Then modify the build.gradle to use your Keystore with the provided password.
-