pkgs/jni/android/src/main/java/com/github/dart_lang/jni/JniPlugin.java

// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package com.github.dart_lang.jni;

import android.app.Activity;
import android.content.Context;
import androidx.annotation.NonNull;
import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.embedding.engine.plugins.activity.ActivityAware;
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
import io.flutter.plugin.common.PluginRegistry.Registrar;

public class JniPlugin implements FlutterPlugin, ActivityAware {

  @Override
  public void onAttachedToEngine(@NonNull FlutterPluginBinding binding) {
    setup(binding.getApplicationContext());
  }

  public static void registerWith(Registrar registrar) {
    JniPlugin plugin = new JniPlugin();
    plugin.setup(registrar.activeContext());
  }

  private void setup(Context context) {
    initializeJni(context, getClass().getClassLoader());
  }

  @Override
  public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {}

  // Activity handling methods
  @Override
  public void onAttachedToActivity(@NonNull ActivityPluginBinding binding) {
    Activity activity = binding.getActivity();
    setJniActivity(activity, activity.getApplicationContext());
  }

  @Override
  public void onDetachedFromActivityForConfigChanges() {}

  @Override
  public void onReattachedToActivityForConfigChanges(@NonNull ActivityPluginBinding binding) {
    Activity activity = binding.getActivity();
    setJniActivity(activity, activity.getApplicationContext());
  }

  @Override
  public void onDetachedFromActivity() {}

  native void initializeJni(Context context, ClassLoader classLoader);

  native void setJniActivity(Activity activity, Context context);

  static {
    System.loadLibrary("dartjni");
  }
}