# Package io.flutter.plugin.common

package io.flutter.plugin.common

- Class
  Description
  ActivityLifecycleListener
  BasicMessageChannel<T>
  A named channel for communicating with the Flutter application using basic, asynchronous message passing.
  BasicMessageChannel.MessageHandler<T>
  A handler of incoming messages.
  BasicMessageChannel.Reply<T>
  Message reply callback.
  BinaryCodec
  A `MessageCodec` using unencoded binary messages, represented as `ByteBuffer`s.
  BinaryMessenger
  Facility for communicating with Flutter using asynchronous message passing with binary messages.
  BinaryMessenger.BinaryMessageHandler
  Handler for incoming binary messages from Flutter.
  BinaryMessenger.BinaryReply
  Binary message reply callback.
  BinaryMessenger.TaskQueue
  An abstraction over the threading policy used to invoke message handlers.
  BinaryMessenger.TaskQueueOptions
  Options that control how a TaskQueue should operate and be created.
  ErrorLogResult
  An implementation of `MethodChannel.Result` that writes error results to the Android log.
  EventChannel
  A named channel for communicating with the Flutter application using asynchronous event streams.
  EventChannel.EventSink
  Event callback.
  EventChannel.StreamHandler
  Handler of stream setup and teardown requests.
  FlutterException
  Thrown to indicate that a Flutter method invocation failed on the Flutter side.
  JSONMessageCodec
  A `MessageCodec` using UTF-8 encoded JSON messages.
  JSONMethodCodec
  A `MethodCodec` using UTF-8 encoded JSON method calls and result envelopes.
  JSONUtil
  MessageCodec<T>
  A message encoding/decoding mechanism.
  MethodCall
  Command object representing a method call on a `MethodChannel`.
  MethodChannel
  A named channel for communicating with the Flutter application using asynchronous method calls.
  MethodChannel.MethodCallHandler
  A handler of incoming method calls.
  MethodChannel.Result
  Method call result callback.
  MethodCodec
  A codec for method calls and enveloped results.
  PluginRegistry
  Container class for Android API listeners used by `ActivityPluginBinding`.
  PluginRegistry.ActivityResultListener
  Delegate interface for handling activity results on behalf of the main `Activity`.
  PluginRegistry.NewIntentListener
  Delegate interface for handling new intents on behalf of the main `Activity`.
  PluginRegistry.RequestPermissionsResultListener
  Delegate interface for handling result of permissions requests on behalf of the main `Activity`.
  PluginRegistry.UserLeaveHintListener
  Delegate interface for handling user leave hints on behalf of the main `Activity`.
  PluginRegistry.WindowFocusChangedListener
  Delegate interface for handling window focus changes on behalf of the main `Activity`.
  StandardMessageCodec
  MessageCodec using the Flutter standard binary encoding.
  StandardMethodCodec
  A `MethodCodec` using the Flutter standard binary encoding.
  StringCodec
  A `MessageCodec` using UTF-8 encoded String messages.