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Document Android development with Maven Central package.

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doc/tutorials/introduction/android_binary_package/dev_with_OCV_on_Android.markdown
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@ -18,7 +18,7 @@ This tutorial assumes you have the following installed and configured:
- Android Studio
- JDK
- Android SDK and NDK
- OpenCV for Android SDK from official [release page on Github](https://github.com/opencv/opencv/releases)
- Optional: OpenCV for Android SDK from official [release page on Github](https://github.com/opencv/opencv/releases)
or [SourceForge](https://sourceforge.net/projects/opencvlibrary/). Advanced: as alternative the SDK may be
built from source code by [instruction on wiki](https://github.com/opencv/opencv/wiki/Custom-OpenCV-Android-SDK-and-AAR-package-build).
@ -26,8 +26,9 @@ If you need help with anything of the above, you may refer to our @ref tutorial_
If you encounter any error after thoroughly following these steps, feel free to contact us via OpenCV [forum](https://forum.opencv.org). We'll do our best to help you out.
Hello OpenCV sample
-------------------
Hello OpenCV sample with SDK
----------------------------
In this section we're gonna create a simple app that does nothing but OpenCV loading. In next section we'll extend it to support camera.
@ -115,6 +116,43 @@ In addition to this instruction you can use some video guide, for example [this
![](images/run_app.png)
Hello OpenCV sample with Maven Central
--------------------------------------
Since OpenCV 4.9.0 OpenCV for Android package is available with Maven Central and may be installed
automatically as Gradle dependency. In this section we're gonna create a simple app that does nothing
but OpenCV loading with Maven Central.
1. Open Android Studio and create empty project by choosing ***Empty Views Activity***
![](images/create_empty_project.png)
2. Setup the project:
- Choose ***Java*** language
- Choose ***Groovy DSL*** build configuration language
- Choose ***Minumum SDK*** with the version number not less than OpenCV supports. For 4.9.0 minimal SDK version is 21.
![](images/setup_project.png)
3. Edit `build.gradle` and add OpenCV library to Dependencies list like this:
@code{.gradle}
dependencies {
implementation 'org.opencv:opencv:4.9.0'
}
@endcode
`4.9.0` may be replaced by any version available as [official release](https://central.sonatype.com/artifact/org.opencv/opencv).
4. Before using any OpenCV function you have to load the library first. If you application includes other
OpenCV-dependent native libraries you should load them ***after*** OpenCV initialization. Add the folowing
code to load the library at app start:
@snippet samples/android/tutorial-1-camerapreview/src/org/opencv/samples/tutorial1/Tutorial1Activity.java ocv_loader_init
Like this:
![](images/sample_code.png)
5. Choose a device to check the sample on and run the code by pressing `run` button
![](images/run_app.png)
Camera view sample
------------------