Loc-Chain/nearby_connections
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added file example, updated readme

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Prerak Mann 2019-08-16 01:00:35 +05:30
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8
README.md
View File

@ -1,6 +1,7 @@
# nearby_connections
An **android** flutter plugin for the Nearby Connections API
Currently supports Bytes and Files.
[![pub package](https://img.shields.io/pub/v/nearby_connections.svg)](https://pub.dartlang.org/packages/nearby_connections)
@ -27,8 +28,11 @@ Add these to AndroidManifest.xml
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Optional: only required for FILE payloads -->
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
```
Since ACCESS_FINE_LOCATION is considered to be dangerous system permissions, in addition to adding them to your manifest, you must request these permissions at runtime.
Since ACCESS_FINE_LOCATION and READ_EXTERNAL_STORAGE is considered to be dangerous system permissions, in addition to adding them to your manifest, you must request these permissions at runtime.
##### As a convinience the library provides methods to check and request location permissions
```java
@ -41,7 +45,7 @@ Nearby().askPermission()
## Work Flow
The work flow is similar to the [android nearby connections library](https://developers.google.com/nearby/connections/overviewoverview)
The work flow is similar to the [Android Nearby Connections library](https://developers.google.com/nearby/connections/overview)
### Advertise for connection
```dart

69
example/lib/main.dart
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@ -35,32 +35,40 @@ class Body extends StatefulWidget {
class _MyBodyState extends State<Body> {
final String userName = Random().nextInt(1000).toString();
final Strategy strategy = Strategy.P2P_STAR;
String cId = "0";
String cId = "0"; //currently connected device ID
File tempFile; //stores the file being transferred
Map<int, String> map = Map();
@override
Widget build(BuildContext context) {
return Center(
child: Column(
children: <Widget>[
Wrap(
children: <Widget>[
RaisedButton(
child: Text("checkPermission"),
onPressed: () async {
if (await Nearby().checkPermissions()) {
Scaffold.of(context)
.showSnackBar(SnackBar(content: Text("yes")));
Scaffold.of(context).showSnackBar(SnackBar(
content: Text("Location permissions granted :)")));
} else {
Scaffold.of(context)
.showSnackBar(SnackBar(content: Text("No")));
Scaffold.of(context).showSnackBar(SnackBar(
content: Text("Location permissions not granted :(")));
}
},
),
RaisedButton(
child: Text("askPermission(location)"),
child: Text("askPermission"),
onPressed: () async {
await Nearby().askPermission();
},
),
],
),
Text("User Name: " + userName),
Wrap(
children: <Widget>[
RaisedButton(
child: Text("Start Advertising"),
onPressed: () async {
@ -75,7 +83,7 @@ class _MyBodyState extends State<Body> {
showSnackbar(status);
},
onDisconnected: (id) {
showSnackbar(id);
showSnackbar("Disconnected: "+id);
},
);
showSnackbar(a);
@ -90,6 +98,10 @@ class _MyBodyState extends State<Body> {
await Nearby().stopAdvertising();
},
),
],
),
Wrap(
children: <Widget>[
RaisedButton(
child: Text("Start Discovery"),
onPressed: () async {
@ -149,6 +161,8 @@ class _MyBodyState extends State<Body> {
await Nearby().stopDiscovery();
},
),
],
),
RaisedButton(
child: Text("Stop All Endpoints"),
onPressed: () async {
@ -171,8 +185,12 @@ class _MyBodyState extends State<Body> {
if (file == null) return;
Nearby().sendFilePayload(cId, file.path);
int payloadId = await Nearby().sendFilePayload(cId, file.path);
showSnackbar("Sending file to $cId");
Nearby().sendBytesPayload(
cId,
Uint8List.fromList(
"$payloadId:${file.path.split('/').last}".codeUnits));
},
),
],
@ -205,12 +223,32 @@ class _MyBodyState extends State<Body> {
cId = id;
Nearby().acceptConnection(
id,
onPayLoadRecieved: (endid, payload) {
onPayLoadRecieved: (endid, payload) async {
if (payload.type == PayloadType.BYTES) {
showSnackbar(
endid + ": " + String.fromCharCodes(payload.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) {
@ -227,6 +265,15 @@ class _MyBodyState extends State<Body> {
"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] = "";
}
}
},
);