问题描述
我创建了一个带有图像选择器的应用,我想在所选图片中嵌入文本或图像并将其保存到图库。
?我的应用
?我试着创造这个
这是我用于图像选择器的代码
import 'dart:io';
import 'package:Flutter/material.dart';
import 'package:image_picker/image_picker.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,title: 'Flutter Watermark',home: HomePage(),);
}
}
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
File _pickedImage;
Future pickAnImage() async {
final pickedFile =
await ImagePicker().getimage(source: ImageSource.gallery);
setState(() {
_pickedImage = File(pickedFile.path);
});
}
_saveImage() {
//Todo: Save image to gallery
}
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,home: Scaffold(
appBar: AppBar(
title: Text("Flutter Watermark"),),body: SingleChildScrollView(
child: Center(
child: Column(
children: <Widget>[
_pickedImage == null
? TextButton(
child: Text("Pick an Image"),onpressed: pickAnImage,)
: Column(
children: [
Image.file(_pickedImage),SizedBox(
height: 50.0,TextButton(
onpressed: _saveImage,child: Text("Save Image"))
],],);
}
}
我遵循了以下教程,但它冻结了应用程序,我无法实现它。
教程
https://medium.com/flutter-community/add-watermark-over-image-in-flutter-e7353e3cf603
有人可以帮我吗?
解决方法
您可以尝试使用this dependency:
正如作者所建议的,this example 与您的查询相似
import 'dart:io';
import 'package:image/image.dart';
void main() {
// Create an image
Image image = Image(320,240);
// Draw some text using 24pt arial font
drawString(image,arial_24,'Hello World');
// Save the image to disk as a PNG
File('test.png').writeAsBytesSync(encodePng(image));
}
从该 link 下载的图像。