JSONMessageCodec class Null safety
MessageCodec with UTF-8 encoded JSON messages.
Supported messages are acyclic values of these forms:
On Android, messages are decoded using the org.json library.
On iOS, messages are decoded using the NSJSONSerialization library.
In both cases, the use of top-level simple messages (null, bool, num,
and String) is supported (by the Flutter SDK). The decoded value will be
null/nil for null, and identical to what would result from decoding a
singleton JSON array with a Boolean, number, or string value, and then
extracting its single element.
The type returned from decodeMessage is dynamic (not Object?), which
means no type checking is performed on its return value. It is strongly
recommended that the return value be immediately cast to a known type to
prevent runtime errors due to typos that the type checker could otherwise
catch.
- Implemented types
Constructors
- JSONMessageCodec()
-
Creates a MessageCodec with UTF-8 encoded JSON messages.
const
Properties
- hashCode → int
-
The hash code for this object.
read-onlyinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
Methods
-
decodeMessage(
ByteData? message) → dynamic -
Decodes the specified
messagefrom binary.override -
encodeMessage(
Object? message) → ByteData? -
Encodes the specified
messagein binary.override -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited