Initial commit

.gitignore

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+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+build/

README.md

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+# Native OpenCV with Android Studio
+
+This application is a sample Android Studio project (tested on 1.4.1) with native OpenCV.
+
+It gets the camera frames, make JNI calls with its gray matrices references as parameters, add some random noise to the images from a C++ method, and render the generated frames.
+
+## Usage
+Here is how to use this project to run native OpenCV code.
+
+* Make sure you have Android SDK up to date, with NDK installed
+* Download latest OpenCV SDK for Android from OpenCV.org and decompress the zip file.
+* Clone this project
+* Create a symlink named `jniLibs` in `app/src/main` that points to `$OPENCV_SDK/sdk/native/libs`
+* In `app/build.gradle` change lines 29 and 30 to points to your OPENCV_SDK
+* Sync gradle
+* Run the application
+
+
+## How to create the native OpenCV project from scratch
+Here is how I made this project.
+
+I used mostly [this](http://stackoverflow.com/questions/27406303/opencv-in-android-studio), [this](http://stackoverflow.com/questions/32171259/opencv-with-android-studio-1-3-using-new-gradle-undefined-reference) and [that](https://github.com/jlhonora/opencv-android-sample)
+
+
+* Download latest OpenCV sdk for Android from OpenCV.org and decompress the zip file.
+* Import OpenCV to Android Studio, From File -> New -> Import Module, choose sdk/java folder in the unzipped opencv archive.
+* Add module dependency by Application -> Module Settings, and select the Dependencies tab. Click + icon at bottom, choose Module Dependency and select the imported OpenCV module.
+
+* Make a symlink named `jniLibs` in `app/src/main` that points to `OPENCV_SDK/sdk/native/libs`
+
+* In application build.gradle use `grandle-experimental:0.3.alpha7`
+ replace
+     `classpath 'com.android.tools.build:gradle:1.3.0'`
+ with
+     `classpath 'com.android.tools.build:gradle-experimental:0.3.0-alpha7'`
+
+
+* In gradle-wrapper.properties, use grade 2.6
+```
+    distributionBase=GRADLE_USER_HOME
+    distributionPath=wrapper/dists
+    zipStoreBase=GRADLE_USER_HOME
+    zipStorePath=wrapper/dists
+    distributionUrl=https\://services.gradle.org/distributions/gradle-2.6-all.zip
+```
+
+* In openCVLibrary module, use the `model` plugin and make sure you use java 7
+```
+    apply plugin: 'com.android.model.library'
+
+    model {
+
+        compileOptions.with {
+            sourceCompatibility=JavaVersion.VERSION_1_7
+            targetCompatibility=JavaVersion.VERSION_1_7
+        }
+
+        android {
+            compileSdkVersion = 19
+            buildToolsVersion = "19.1"
+
+            defaultConfig.with {
+                minSdkVersion.apiLevel = 19
+                targetSdkVersion.apiLevel = 19
+            }
+        }
+    }
+```
+
+* In app `build.gradle`: use the `model` plugin, make sure you use java 7, add opencv native stuff, remove unused
+  dependencies
+
+ Remove the following lines:
+
+```
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:appcompat-v7:23.1.1'
+    compile 'com.android.support:design:23.1.1'
+```
+
+And add OpenCV stuff:
+ See the file [here](https://github.com/leadrien/opencv_native_androidstudio/blob/master/app/build.gradle)
+ (You have to set the OpenCV SDK location in it)
+
+
+
+* In the app module, delete the following files and folders:
+```
+  src/main/res/values-21
+  src/main/res/values-w820dp
+  src/main/res/values/stypes.xml
+```
+
+* In `src/main/res/menu/menu_main.xml` remove `app:showAsAction="never"`
+
+* In `AndreoidManifest.xml` remove the following lines:
+```
+    android:theme="@style/AppTheme"
+    android:theme="@style/AppTheme.NoActionBar" >
+```
+
+  And add the camera permissions:
+
+```
+    <uses-permission android:name="android.permission.CAMERA"/>
+
+    <uses-feature android:name="android.hardware.camera"/>
+    <uses-feature android:name="android.hardware.camera.autofocus"/>
+    <uses-feature android:name="android.hardware.camera.front"/>
+    <uses-feature android:name="android.hardware.camera.front.autofocus"/>
+```
+
+* [Here](https://github.com/leadrien/opencv_native_androidstudio/blob/master/app/src/main/java/ch/hepia/lsn/opencvnative/MainActivity.java) is an example of the Activity.
+
+
+* In `app/src/main` add a new directory named `jni`
+  Create a new cpp class, named `native_opencv.h` `native_opencv.cpp`
+
+* [Here](https://github.com/leadrien/opencv_native_androidstudio/blob/master/app/src/main/jni/mymodule.cpp) is an example of C++ code that add random noise to a frame

app/.gitignore

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+/build