import 'dart:io'; import 'dart:math'; import 'dart:typed_data'; import 'package:flutter/material.dart'; import 'package:nearby_connections/nearby_connections.dart'; import 'package:image_picker/image_picker.dart'; void main() => runApp(MyApp()); class MyApp extends StatefulWidget { @override _MyAppState createState() => _MyAppState(); } class _MyAppState extends State { @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( appBar: AppBar( title: const Text('Plugin example app'), ), body: Body(), ), ); } } class Body extends StatefulWidget { @override _MyBodyState createState() => _MyBodyState(); } class _MyBodyState extends State { final String userName = Random().nextInt(1000).toString(); final Strategy strategy = Strategy.P2P_STAR; String cId = "0"; //currently connected device ID File tempFile; //stores the file being transferred Map map = Map(); @override Widget build(BuildContext context) { return Center( child: Column( children: [ Wrap( children: [ RaisedButton( child: Text("checkPermission"), onPressed: () async { if (await Nearby().checkPermissions()) { Scaffold.of(context).showSnackBar(SnackBar( content: Text("Location permissions granted :)"))); } else { Scaffold.of(context).showSnackBar(SnackBar( content: Text("Location permissions not granted :("))); } }, ), RaisedButton( child: Text("askPermission"), onPressed: () async { await Nearby().askPermission(); }, ), ], ), Text("User Name: " + userName), Wrap( children: [ RaisedButton( child: Text("Start Advertising"), onPressed: () async { try { bool a = await Nearby().startAdvertising( userName, strategy, onConnectionInitiated: (id, info) { oci(id, info); }, onConnectionResult: (id, status) { showSnackbar(status); }, onDisconnected: (id) { showSnackbar("Disconnected: "+id); }, ); showSnackbar(a); } catch (exception) { showSnackbar(exception); } }, ), RaisedButton( child: Text("Stop Advertising"), onPressed: () async { await Nearby().stopAdvertising(); }, ), ], ), Wrap( children: [ RaisedButton( child: Text("Start Discovery"), onPressed: () async { try { bool a = await Nearby().startDiscovery( userName, strategy, onEndpointFound: (id, name, serviceId) { print("in callback"); showModalBottomSheet( context: context, builder: (builder) { return Center( child: Column( children: [ Text("id: " + id), Text("Name: " + name), Text("ServiceId: " + serviceId), RaisedButton( child: Text("Request Connection"), onPressed: () { Navigator.pop(context); Nearby().requestConnection( userName, id, onConnectionInitiated: (id, info) { oci(id, info); }, onConnectionResult: (id, status) { showSnackbar(status); }, onDisconnected: (id) { showSnackbar(id); }, ); }, ), ], ), ); }, ); }, onEndpointLost: (id) { showSnackbar(id); }, ); showSnackbar(a); } catch (e) { showSnackbar(e); } }, ), RaisedButton( child: Text("Stop Discovery"), onPressed: () async { await Nearby().stopDiscovery(); }, ), ], ), RaisedButton( child: Text("Stop All Endpoints"), onPressed: () async { await Nearby().stopAllEndpoints(); }, ), RaisedButton( child: Text("Send Random Bytes Payload"), onPressed: () async { String a = Random().nextInt(100).toString(); showSnackbar("Sending $a to $cId"); Nearby().sendBytesPayload(cId, Uint8List.fromList(a.codeUnits)); }, ), RaisedButton( child: Text("Send File Payload"), onPressed: () async { File file = await ImagePicker.pickImage(source: ImageSource.gallery); if (file == null) return; int payloadId = await Nearby().sendFilePayload(cId, file.path); showSnackbar("Sending file to $cId"); Nearby().sendBytesPayload( cId, Uint8List.fromList( "$payloadId:${file.path.split('/').last}".codeUnits)); }, ), ], ), ); } void showSnackbar(dynamic a) { Scaffold.of(context).showSnackBar(SnackBar( content: Text(a.toString()), )); } /// Called on a Connection request (on both devices) void oci(String id, ConnectionInfo info) { showModalBottomSheet( context: context, builder: (builder) { return Center( child: Column( children: [ Text("id: " + id), Text("Token: " + info.authenticationToken), Text("Name" + info.endpointName), Text("Incoming: " + info.isIncomingConnection.toString()), RaisedButton( child: Text("Accept Connection"), onPressed: () { Navigator.pop(context); cId = id; Nearby().acceptConnection( id, onPayLoadRecieved: (endid, payload) async { if (payload.type == PayloadType.BYTES) { String str = String.fromCharCodes(payload.bytes); showSnackbar(endid + ": " + str); if (str.contains(':')) { // used for file payload as file payload is mapped as // payloadId:filename int payloadId = int.parse(str.split(':')[0]); String fileName = (str.split(':')[1]); if (map.containsKey(payloadId)) { if (await tempFile.exists()) { tempFile.rename( tempFile.parent.path + "/" + fileName); } else { showSnackbar("File doesnt exist"); } } else { //add to map if not already map[payloadId] = fileName; } } } else if (payload.type == PayloadType.FILE) { showSnackbar(endid + ": File transfer started"); tempFile = File(payload.filePath); } }, onPayloadTransferUpdate: (endid, payloadTransferUpdate) { if (payloadTransferUpdate.status == PayloadStatus.IN_PROGRRESS) { print(payloadTransferUpdate.bytesTransferred); } else if (payloadTransferUpdate.status == PayloadStatus.FAILURE) { print("failed"); showSnackbar(endid + ": FAILED to transfer file"); } else if (payloadTransferUpdate.status == PayloadStatus.SUCCESS) { print( "success, total bytes = ${payloadTransferUpdate.totalBytes}"); showSnackbar(endid + ": SUCCESS in file transfer (file is un-named in downloads) "); if (map.containsKey(payloadTransferUpdate.id)) { //rename the file now String name = map[payloadTransferUpdate.id]; tempFile.rename(tempFile.parent.path + "/" + name); } else { //bytes not received till yet map[payloadTransferUpdate.id] = ""; } } }, ); }, ), RaisedButton( child: Text("Reject Connection"), onPressed: () async { Navigator.pop(context); try { await Nearby().rejectConnection(id); } catch (e) { showSnackbar(e); } }, ), ], ), ); }, ); } }