call

Description:

call

call #












You can use the package to open the dylib defined in the assets field of pubsepc.yaml.



1.Prepare your dynamic link library #

Write your C-code

// file: ${PROJECT_ROOT}/assets/main.c

int add(int a, int b) {
return a + b;
}
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Compile it to a dylib

gcc -shared -fPIC -o libadd.so main.c # Linux
gcc -shared -fPIC -o libadd.dll main.c # Windows
clang -shared -fPIC -o libadd.dylib main.c # MacOS

# file: ${PROJECT_ROOT}/assets/libadd.dll
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2. Declare the assets path #
You should declare path of the dylib in the pubspec.yaml file as images.
flutter:
assets:
- assets/libadd.dll # Fill it in according to your storage location
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3. Write flutter core code to call native function. #
import 'package:flutter/material.dart';

import 'dart:ffi' as ffi;
import 'package:call/call.dart';

typedef FuncNative = ffi.Int32 Function(ffi.Int32, ffi.Int32);
typedef FuncDart = int Function(int, int);



void main() => runApp(App());

class App extends StatefulWidget {
@override
_AppState createState() => _AppState();
}

class _AppState extends State<App> {
@override
Widget build(BuildContext context) {
var dll = getDyLibModule('assets/libadd.dll'); // use it as images.
var add = dll.lookupFunction<FuncNative, FuncDart>('add');

return Text(
add(999, 54639).toString(),
textDirection: TextDirection.ltr
);
}
}
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4. Run the flutter application #
Finally, You can see the number 55638 in the top left corner of the application.