Update to SDK 27, gradle 3.0.1

.gitignore

@@ -1,7 +1,9 @@
 
-# Created by https://www.gitignore.io/api/android
+# Created by https://www.gitignore.io/api/androidstudio
+
+### AndroidStudio ###
+# Covers files to be ignored for android development using Android Studio.
 
-### Android ###
 # Built application files
 *.apk
 *.ap_
@@ -18,9 +20,13 @@ gen/
 out/
 
 # Gradle files
+.gradle
 .gradle/
 build/
 
+# Signing files
+.signing/
+
 # Local configuration file (sdk path, etc)
 local.properties
 
@@ -30,23 +36,97 @@ proguard/
 # Log Files
 *.log
 
-# Android Studio Navigation editor temp files
+# Android Studio
+/*/build/
+/*/local.properties
+/*/out
+/*/*/build
+/*/*/production
+captures/
 .navigation/
+*.ipr
+*~
+*.swp
 
-# Android Studio captures folder
-captures/
+# Android Patch
+gen-external-apklibs
+
+# External native build folder generated in Android Studio 2.2 and later
+.externalNativeBuild
+
+# NDK
+obj/
 
-# Intellij
+# IntelliJ IDEA
 *.iml
+*.iws
+/out/
+
+# User-specific configurations
+.idea/libraries/
 .idea/workspace.xml
 .idea/tasks.xml
-.idea/libraries
+.idea/.name
+.idea/compiler.xml
+.idea/copyright/profiles_settings.xml
+.idea/encodings.xml
+.idea/misc.xml
+.idea/modules.xml
+.idea/scopes/scope_settings.xml
+.idea/dictionaries
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+.idea/datasources.xml
+.idea/dataSources.ids
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
 
-# Keystore files
-*.jks
+# OS-specific files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
 
-# External native build folder generated in Android Studio 2.2 and later
-.externalNativeBuild
+# Legacy Eclipse project files
+.classpath
+.project
+.cproject
+.settings/
 
-### Android Patch ###
-gen-external-apklibs
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.war
+*.ear
+
+# virtual machine crash logs (Reference: http://www.java.com/en/download/help/error_hotspot.xml)
+hs_err_pid*
+
+## Plugin-specific files:
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Mongo Explorer plugin
+.idea/mongoSettings.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### AndroidStudio Patch ###
+
+!/gradle/wrapper/gradle-wrapper.jar
+
+
+# End of https://www.gitignore.io/api/androidstudio

README.md

@@ -13,7 +13,7 @@ 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
+* Make sure you have Android SDK up to date, with NDK installed and CMake
 * 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 `YOUR_OPENCV_SDK/sdk/native/libs`

app/CMakeLists.txt

@@ -6,7 +6,7 @@
 cmake_minimum_required(VERSION 3.4.1)
 
 # OpenCV stuff
-include_directories(/opt/opencv-android-sdk-v3.0/sdk/native/jni/include)
+include_directories(/opt/opencv-android-sdk/sdk/native/jni/include)
 add_library( lib_opencv SHARED IMPORTED )
 set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so)
 

app/build.gradle

@@ -1,11 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
     defaultConfig {
         applicationId "ch.hepia.iti.opencvnativeandroidstudio"
         minSdkVersion 19
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -36,10 +36,6 @@ android {
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
-    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
-        exclude group: 'com.android.support', module: 'support-annotations'
-    })
-    compile 'com.android.support:appcompat-v7:26.1.0'
-    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:appcompat-v7:27.0.2'
     compile project(':openCVLibrary300')
 }

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0'
+        classpath 'com.android.tools.build:gradle:3.0.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

openCVLibrary300/build.gradle

@@ -1,11 +1,11 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
 
     defaultConfig {
         minSdkVersion 19
-        targetSdkVersion 26
+        targetSdkVersion 27
     }
 
     buildTypes {