我试图编写简单的android文件交换应用程序，主要使用来自https://developers.google.com/nearby/connections/android/exchange-data和Walkietalkie应用程序的代码段。
但我仍然坚持传输文件有效负载第二个sendPayload，onPayloadTransferUpdate仅在发送端调用。发现，广告，连接到端点，一切正常。发件人是＆＃34;发送＆＃34;，但是Reciever只获取带有id和filename的字符串消息并等待（onPayloadTransferUpdate仅为第一个sendPayload调用2次）然后什么都没有，在发送者完成传输后断开连接。
public void sendFile(String uri) {
File file = new File(uri);
if (file.exists() && mEstablishedConnections.values().size() > 0) {
for (Endpoint endpoint : mEstablishedConnections.values()) {
try {
// Open the ParcelFileDescriptor for this URI with read access.
ParcelFileDescriptor pfd = getContentResolver().openFileDescriptor(Uri.fromFile(file), "r");
Payload filePayload = Payload.fromFile(pfd);
// Construct a simple message mapping the ID of the file payload to the desired filename.
String payloadFilenameMessage = filePayload.getId() + ":" + Uri.fromFile(file).getLastPathSegment();
// Send this message as a bytes payload.
Nearby.Connections.sendPayload(mGoogleApiClient,
endpoint.getId(),
Payload.fromBytes(payloadFilenameMessage.getBytes("UTF-8")));
// Finally, send the file payload.
Nearby.Connections.sendPayload(mGoogleApiClient,
endpoint.getId(),
filePayload);
} catch (FileNotFoundException | UnsupportedEncodingException e) {
e.printStackTrace();
}
}
} else {
Log.e(TAG, "sendFile: EstablishedConnections == 0");
}
}
private final PayloadCallback mPayloadCallback = new PayloadCallback() {
@Override
public void onPayloadReceived(String endpointId, Payload payload) {
Log.d(TAG, String.format("onPayloadReceived(endpointId=%s, payload=%s)", endpointId, payload));
try {
if (payload.getType() == Payload.Type.BYTES) {
Log.d(TAG, "onPayloadReceived: Payload.Type.BYTES");
String payloadFilenameMessage = new String(payload.asBytes(), "UTF-8");
Log.d(TAG, "onPayloadReceived: BYTES " + payloadFilenameMessage);
addPayloadFilename(payloadFilenameMessage);
} else if (payload.getType() == Payload.Type.FILE) {
// Add this to our tracking map, so that we can retrieve the payload later.
incomingFilePayloads.put(payload.getId(), payload);
Log.d(TAG, "onPayloadReceived: Payload.Type.FILE");
} else if (payload.getType() == Payload.Type.STREAM) {
//payload.asStream().asInputStream()
Log.d(TAG, "onPayloadReceived: Payload.Type.STREAM");
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
@Override
public void onPayloadTransferUpdate(String endpointId, PayloadTransferUpdate update) {
Log.d(TAG, String.format("onPayloadTransferUpdate(endpointId=%s, update=%s)",
endpointId, update));
switch(update.getStatus()) {
case PayloadTransferUpdate.Status.IN_PROGRESS:
break;
case PayloadTransferUpdate.Status.SUCCESS:
Log.d(TAG, "onPayloadTransferUpdate: SUCCESS");
Payload payload = incomingFilePayloads.remove(update.getPayloadId());
if (payload != null && payload.getType() == Payload.Type.FILE) {
// Retrieve the filename that was received in a bytes payload.
String newFilename = filePayloadFilenames.remove(update.getPayloadId());
java.io.File payloadFile = payload.asFile().asJavaFile();
// Rename the file.
payloadFile.renameTo(new File(payloadFile.getParentFile(), newFilename));
}
break;
case PayloadTransferUpdate.Status.FAILURE:
Log.d(TAG, "onPayloadTransferUpdate: FAILURE");
break;
}
}
};
除了google示例walkietalkie之外还有一个有效的例子吗？
发件人
D / ShareService：sendFile：filename message -7668342386822656500：a73ecba18dc6c8506ed89c1ed47c9948.mp4
D / ShareService：onPayloadTransferUpdate（endpointId = osUc，update = com.google.android.gms.nearby.connection.PayloadTransferUpdate@e16fc0a8） D / ShareService：onPayloadTransferUpdate：57 D / ShareService：onPayloadTransferUpdate：1048576 D / DiscoveryActivity：onNext：ShareState {state =＆＃39;发送＆＃39;，stateCode = 800} D / ShareService：onPayloadTransferUpdate（endpointId = osUc，update = com.google.android.gms.nearby.connection.PayloadTransferUpdate@813731ce） D / ShareService：onPayloadTransferUpdate：1055744 D / DiscoveryActivity：onNext：ShareState {state =＆＃39;发送＆＃39;，stateCode = 800} D / ShareService：onPayloadTransferUpdate（endpointId = osUc，update = com.google.android.gms.nearby.connection.PayloadTransferUpdate@81372a4c） 11-01 07：35：20.790 D / ShareService：onPayloadTransferUpdate：SUCCESS 11-01 07：35：41.587 D / ShareService：disconnectedFromEndpoint（endpoint = Endpoint {id = osUc，name = 87389}） 11-01 07：35：41.587 D / ShareService：onEndpointDisconnected
收件人
D / ShareService：onConnectionResponse（endpointId = ABVq，result = com.google.android.gms.nearby.connection.ConnectionResolution@9edd5e3） D / ShareService：connectedToEndpoint（endpoint = Endpoint {id = ABVq，name = 08043}） D / ShareService：onEndpointConnected D / ShareService：stopDiscovering D / ShareService：stopAdvertising
D / ShareService：onPayloadReceived（endpointId = ABVq，payload = com.google.android.gms.nearby.connection.Payload@516155e） D / ShareService：onPayloadReceived：Payload.Type.BYTES D / ShareService：onPayloadReceived：BYTES -7668342386822656500：a73ecba18dc6c8506ed89c1ed47c9948.mp4 D / ShareService：onPayloadTransferUpdate（endpointId = ABVq，update = com.google.android.gms.nearby.connection.PayloadTransferUpdate@ba6f47ac） D / ShareService：onPayloadTransferUpdate：57 D / ShareService：onPayloadTransferUpdate（endpointId = ABVq，update = com.google.android.gms.nearby.connection.PayloadTransferUpdate@ba6f402a） 11-01 08：10：52.525 D / ShareService：onPayloadTransferUpdate：SUCCESS 11-01 08：11：12.355 D / ShareService：disconnectedFromEndpoint（endpoint = Endpoint {id = ABVq，name = 08043}） D / ShareService：onEndpointDisconnected
onPayloadTransferUpdate：第一次字符串传输的成功
延迟
Payload bytePayload = outgoingPayloads.remove(update.getPayloadId());
if (bytePayload != null && bytePayload.getType() == Payload.Type.BYTES) {
if (endpnt != null && filePayload != null) {
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Nearby.Connections.sendPayload(mGoogleApiClient,
endpnt.getId(),
filePayload);
}
}
文件：///data/data/com.package.name/files/folder/a73ecba18dc6c8506ed89c1ed47c9948.mp4
答案 0 :(得分：2)
如果您需要，我可以提供一个工作示例，但您几乎拥有它。一些指示：