Init

native_opencv/android/.gitignore

@@ -0,0 +1,10 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx/
+src/main/jniLibs/

native_opencv/android/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.4.1)
+
+include_directories(../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_java4.so)
+
+find_library(log-lib log)
+
+add_library(native_opencv SHARED ../ios/Classes/native_opencv.cpp)
+target_link_libraries(native_opencv lib_opencv ${log-lib})

native_opencv/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java

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+package io.flutter.plugins;
+
+import io.flutter.plugin.common.PluginRegistry;
+
+/**
+ * Generated file. Do not edit.
+ */
+public final class GeneratedPluginRegistrant {
+  public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
+  }
+}

native_opencv/android/build.gradle

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+group 'com.example.native_opencv'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.0.3'
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+apply plugin: 'com.android.library'
+
+android {
+    packagingOptions {
+        pickFirst 'lib/arm64-v8a/libopencv_java4.so'
+        pickFirst 'lib/armeabi-v7a/libopencv_java4.so'
+        pickFirst 'lib/x86/libopencv_java4.so'
+        pickFirst 'lib/x86_64/libopencv_java4.so'
+    }
+    compileSdkVersion 28
+
+    defaultConfig {
+        minSdkVersion 24
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+
+        externalNativeBuild {
+            cmake {
+                // Enabling exception, RTTI and setting C++ standard version
+                cppFlags '-frtti -fexceptions -std=c++11'
+
+                // Shared runtime for shared libraries
+                arguments "-DANDROID_STL=c++_shared"
+            }
+        }
+    }
+
+    externalNativeBuild {
+        cmake {
+            path "CMakeLists.txt"
+        }
+    }
+
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+}
+
+dependencies {}

native_opencv/android/gradle.properties

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+org.gradle.jvmargs=-Xmx1536M
+android.enableR8=true
+android.useAndroidX=true
+android.enableJetifier=true

native_opencv/android/gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

native_opencv/android/settings.gradle

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+rootProject.name = 'native_opencv'

native_opencv/android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.example.native_opencv">
+</manifest>

native_opencv/android/src/main/java/com/example/native_opencv/NativeOpencvPlugin.java

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+package com.example.native_opencv;
+
+import androidx.annotation.NonNull;
+
+import io.flutter.embedding.engine.plugins.FlutterPlugin;
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
+import io.flutter.plugin.common.MethodChannel.Result;
+
+/** NativeOpencvPlugin */
+public class NativeOpencvPlugin implements FlutterPlugin, MethodCallHandler {
+  /// The MethodChannel that will the communication between Flutter and native Android
+  ///
+  /// This local reference serves to register the plugin with the Flutter Engine and unregister it
+  /// when the Flutter Engine is detached from the Activity
+  private MethodChannel channel;
+
+  @Override
+  public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
+    channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "native_opencv");
+    channel.setMethodCallHandler(this);
+  }
+
+  @Override
+  public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
+    if (call.method.equals("getPlatformVersion")) {
+      result.success("Android " + android.os.Build.VERSION.RELEASE);
+    } else {
+      result.notImplemented();
+    }
+  }
+
+  @Override
+  public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
+    channel.setMethodCallHandler(null);
+  }
+}