shell/platform/android/io/flutter/plugin/platform/PlatformViewFactory.java

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package io.flutter.plugin.platform;

import android.content.Context;
import io.flutter.plugin.common.MessageCodec;

public abstract class PlatformViewFactory {
  private final MessageCodec<Object> createArgsCodec;

  /** @param createArgsCodec the codec used to decode the args parameter of {@link #create}. */
  public PlatformViewFactory(MessageCodec<Object> createArgsCodec) {
    this.createArgsCodec = createArgsCodec;
  }

  /**
   * Creates a new Android view to be embedded in the Flutter hierarchy.
   *
   * @param context the context to be used when creating the view, this is different than
   *     FlutterView's context.
   * @param viewId unique identifier for the created instance, this value is known on the Dart side.
   * @param args arguments sent from the Flutter app. The bytes for this value are decoded using the
   *     createArgsCodec argument passed to the constructor. This is null if createArgsCodec was
   *     null, or no arguments were sent from the Flutter app.
   */
  public abstract PlatformView create(Context context, int viewId, Object args);

  /** Returns the codec to be used for decoding the args parameter of {@link #create}. */
  public final MessageCodec<Object> getCreateArgsCodec() {
    return createArgsCodec;
  }
}