标签：uil state not layout grant access idg scan topic
一、Flutter 扫描二维码条形码插件 barcode_scan
1、安装
2、配置权限
Add the camera permission to your AndroidManifest.xml
Add the BarcodeScanner activity to your AndroidManifest.xml. Do NOT modify the name.
3、检查、配置 build.gradle
dependencies: barcode_scan: ^1.0.0
<activity android:name="com.apptreesoftware.barcodescan.BarcodeScannerActivity"/>
3.1 编辑你的 android 目录下面的 build.gradle (Edit your project-level build.gradle file to look like this)
注意:官方文档配置的kotlin_version的版本是1.2.31，但是实际发现1.2.31 会报错。所以本项目使用 1.3.0。
...
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
} }
3.2 编辑你的 android/app 目录下面的 build.gradle (Edit your app-level build.gradle file to look like this)
implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
...
}
4、使用
class ScanPage extends StatefulWidget {
ScanPage({Key key}) : super(key: key);
_ScanPageState createState() => _ScanPageState(); }
class _ScanPageState extends State<ScanPage> {
Future _scan() async { try {
String barcode = await BarcodeScanner.scan(); setState(() {
return this.barcode = barcode; });
} on PlatformException catch (e) {
if (e.code == BarcodeScanner.CameraAccessDenied) {
setState(() {
return this.barcode = ‘The user did not grant the camera
permission!‘; });
} else {
setState(() {
return this.barcode = ‘Unknown error: $e‘; });
}
} on FormatException{
setState(() => this.barcode = ‘null (User returned using the "back"-button before scanning anything. Result)‘);
} catch (e) {
setState(() => this.barcode = ‘Unknown error: $e‘);
} }
@override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: FloatingActionButton(
child: Icon(Icons.camera_roll),
onPressed: _scan, ),
appBar: AppBar( title: Text("扫码"),
),
body:Text("扫码--${barcode}"), );
} }
二、Flutter 使用barcode_scan提示如下 错误解决方案
Android dependency ‘androidx.core:core’ has different version for the compile (1.0.0) and runtime (1.0.2) classpath. You should manually set the same version via DependencyResolution
http://bbs.itying.com/topic/5d0468735923fe0334c35ea2
标签：uil state not layout grant access idg scan topic
原文地址：https://www.cnblogs.com/zhaofeis/p/12763078.html
