颤振将PDF数据发送到打印机

Question

我已使用wifip2p 插件成功发现并连接到打印机。 我想通过将 URL 或资产发送到打印机来打印 PDF 文件。

请告诉我如何在连接打印机后通过将 PDF 数据发送到打印机进行打印。感谢您回答问题。

搜索打印

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/services.dart';
import 'package:wifip2p/wifip2p.dart';

class SearchIconButton extends StatelessWidget {
  const SearchIconButton({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {

    Size size = MediaQuery.of(context).size;

    return Stack(
      children: <Widget>[
        Positioned(
          right: size.width * 0.02,
          bottom: size.height * 0.02,
          child: FloatingActionButton(
            onPressed: () async{
              try{
                await WifiP2P.discoverDevices();
              }on PlatformException{
                print('Error!');
              }
            },
            child: Icon(Icons.search),
          ),
        ),

      ],
    );
  }
}

写下打印名称

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/services.dart';
import 'package:wifip2p/wifip2p.dart';

class WritePrintName extends StatelessWidget {
  const WritePrintName({Key? key}) : super(key: key);

  Future<void> conntectToDevice(int position) async{
    CircularProgressIndicator();
    try{
      await WifiP2P.connectToDevice(position);
    }on PlatformException{
      print('Error!');
    }
  }

  @override
  Widget build(BuildContext context) {

    Size size = MediaQuery.of(context).size;

    return Positioned(
      top: size.height * 0.1,
      child: StreamBuilder(
        stream: WifiP2P.peerListChangeEvent,
        builder: (BuildContext context, AsyncSnapshot<List<String>> snapshot){
          if(snapshot.hasData){
            List<Container> list = [];
            for(int nIndex=0; nIndex<snapshot.data!.length; nIndex++){
              list.add(Container(
                width: size.width,
                height: size.height * 0.05,
                alignment: Alignment.center,
                child: TextButton(
                  onPressed: (){
                    conntectToDevice(nIndex);
                  },
                  child: Text(snapshot.data![nIndex], textAlign: TextAlign.center,),
                ),
              ));
            }
            return Column(children: list,);
          }
          return Container(
            width: size.width,
            height: size.height * 0.05,
            alignment: Alignment.center,
            child:Text(
              '검색된 프린터가 없습니다.',
              style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
            ) ,
          );
        },
      ),
    );
  }
}

Answer 1

您可以通过安装this 包来做到这一点：