Flutter Platform channel简介

Flutter中通过Platform Channel实现Flutter和原生端的数据传递

类型对照表

The following table shows how Dart values are received on the platform side and vice versa:

Dart	Java	Kotlin	Obj-C	Swift
null	null	null	nil (NSNull when nested)	nil
bool	java.lang.Boolean	Boolean	NSNumber numberWithBool:	NSNumber(value: Bool)
int	java.lang.Integer	Int	NSNumber numberWithInt:	NSNumber(value: Int32)
int, if 32 bits not enough	java.lang.Long	Long	NSNumber numberWithLong:	NSNumber(value: Int)
double	java.lang.Double	Double	NSNumber numberWithDouble:	NSNumber(value: Double)
String	java.lang.String	String	NSString	String
Uint8List	byte[]	ByteArray	FlutterStandardTypedData typedDataWithBytes:	FlutterStandardTypedData(bytes: Data)
Int32List	int[]	IntArray	FlutterStandardTypedData typedDataWithInt32:	FlutterStandardTypedData(int32: Data)
Int64List	long[]	LongArray	FlutterStandardTypedData typedDataWithInt64:	FlutterStandardTypedData(int64: Data)
Float64List	double[]	DoubleArray	FlutterStandardTypedData typedDataWithFloat64:	FlutterStandardTypedData(float64: Data)
List	java.util.ArrayList	List	NSArray	Array
Map	java.util.HashMap	HashMap	NSDictionary	Dictionary

拓展

FIDL：Flutter与原生通讯的新姿势，不局限于基础数据类型

参考资料

Flutter官方文档： Writing custom platform-specific code (opens new window)