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
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@ -1,6 +1,7 @@
# nearby_connections # nearby_connections
An **android** flutter plugin for the Nearby Connections API 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) [![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.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_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 ##### As a convinience the library provides methods to check and request location permissions
```java ```java
@ -41,7 +45,7 @@ Nearby().askPermission()
## Work Flow ## 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 ### Advertise for connection
```dart ```dart

261
example/lib/main.dart
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@ -35,119 +35,133 @@ class Body extends StatefulWidget {
class _MyBodyState extends State<Body> { class _MyBodyState extends State<Body> {
final String userName = Random().nextInt(1000).toString(); final String userName = Random().nextInt(1000).toString();
final Strategy strategy = Strategy.P2P_STAR; 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 @override
Widget build(BuildContext context) { Widget build(BuildContext context) {
return Center( return Center(
child: Column( child: Column(
children: <Widget>[ children: <Widget>[
RaisedButton( Wrap(
child: Text("checkPermission"), children: <Widget>[
onPressed: () async { RaisedButton(
if (await Nearby().checkPermissions()) { child: Text("checkPermission"),
Scaffold.of(context) onPressed: () async {
.showSnackBar(SnackBar(content: Text("yes"))); if (await Nearby().checkPermissions()) {
} else { Scaffold.of(context).showSnackBar(SnackBar(
Scaffold.of(context) content: Text("Location permissions granted :)")));
.showSnackBar(SnackBar(content: Text("No"))); } else {
} Scaffold.of(context).showSnackBar(SnackBar(
}, content: Text("Location permissions not granted :(")));
}
},
),
RaisedButton(
child: Text("askPermission"),
onPressed: () async {
await Nearby().askPermission();
},
),
],
), ),
RaisedButton( Text("User Name: " + userName),
child: Text("askPermission(location)"), Wrap(
onPressed: () async { children: <Widget>[
await Nearby().askPermission(); RaisedButton(
}, child: Text("Start Advertising"),
), onPressed: () async {
Text("UserName: " + userName), try {
RaisedButton( bool a = await Nearby().startAdvertising(
child: Text("Start Advertising"), userName,
onPressed: () async { strategy,
try { onConnectionInitiated: (id, info) {
bool a = await Nearby().startAdvertising( oci(id, info);
userName, },
strategy, onConnectionResult: (id, status) {
onConnectionInitiated: (id, info) { showSnackbar(status);
oci(id, info); },
}, onDisconnected: (id) {
onConnectionResult: (id, status) { showSnackbar("Disconnected: "+id);
showSnackbar(status);
},
onDisconnected: (id) {
showSnackbar(id);
},
);
showSnackbar(a);
} catch (exception) {
showSnackbar(exception);
}
},
),
RaisedButton(
child: Text("Stop Advertising"),
onPressed: () async {
await Nearby().stopAdvertising();
},
),
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: <Widget>[
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);
},
);
},
),
],
),
);
}, },
); );
}, showSnackbar(a);
onEndpointLost: (id) { } catch (exception) {
showSnackbar(id); showSnackbar(exception);
}, }
); },
showSnackbar(a); ),
} catch (e) { RaisedButton(
showSnackbar(e); child: Text("Stop Advertising"),
} onPressed: () async {
}, await Nearby().stopAdvertising();
},
),
],
), ),
RaisedButton( Wrap(
child: Text("Stop Discovery"), children: <Widget>[
onPressed: () async { RaisedButton(
await Nearby().stopDiscovery(); 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: <Widget>[
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( RaisedButton(
child: Text("Stop All Endpoints"), child: Text("Stop All Endpoints"),
@ -171,8 +185,12 @@ class _MyBodyState extends State<Body> {
if (file == null) return; if (file == null) return;
Nearby().sendFilePayload(cId, file.path); int payloadId = await Nearby().sendFilePayload(cId, file.path);
showSnackbar("Sending file to $cId"); 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; cId = id;
Nearby().acceptConnection( Nearby().acceptConnection(
id, id,
onPayLoadRecieved: (endid, payload) { onPayLoadRecieved: (endid, payload) async {
if (payload.type == PayloadType.BYTES) { if (payload.type == PayloadType.BYTES) {
showSnackbar( String str = String.fromCharCodes(payload.bytes);
endid + ": " + 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) { } else if (payload.type == PayloadType.FILE) {
showSnackbar(endid + ": File transfer started"); showSnackbar(endid + ": File transfer started");
tempFile = File(payload.filePath);
} }
}, },
onPayloadTransferUpdate: (endid, payloadTransferUpdate) { onPayloadTransferUpdate: (endid, payloadTransferUpdate) {
@ -227,6 +265,15 @@ class _MyBodyState extends State<Body> {
"success, total bytes = ${payloadTransferUpdate.totalBytes}"); "success, total bytes = ${payloadTransferUpdate.totalBytes}");
showSnackbar(endid + showSnackbar(endid +
": SUCCESS in file transfer (file is un-named in downloads) "); ": 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] = "";
}
} }
}, },
); );