In purpose to get storage permissions in Android 11 I have found here a nice code which works fine for me
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.Q) {
if(!Environment.isExternalStorageManager()){
try {
Uri uri = Uri.parse("package:" + BuildConfig.APPLICATION_ID);
Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION, uri);
intent.addCategory("android.intent.category.DEFAULT");
intent.setData(Uri.parse(String.format("package:%s", getApplicationContext().getPackageName())));
startActivity(intent);
} catch (Exception ex){
Intent intent = new Intent();
intent.setAction(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
startActivity(intent);
}
}
} else {
if(ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 100);
}
}
But Android 11 has more strict rules for access to the folders like ...Android/data/...
There is an opinion, that indeed applications can not have access to Android/data/ content anymore.
At the same time there are Files Explorers type of applications that can do it easily after getting an additional/special permision (see a snapshot below)
Could anyone help me how can I make same request for permission as shown on the snapshot above?
Related
to make our apps working indoor to fetch location we need Network Location Services switch to be on
And we're using this function to detect any setting that still off
We noticed the response which is LocationSettingsStates, when the switch on or off is always true
Am I using wrong function to detect it??
The class and methods mentioned in the original post are the right ones to be used for checking network location service availability.
Please refer to a partial code extracted from Huawei sample code obtained from Github
public void checkSettings(View view) {
new Thread() {
#Override
public void run() {
try {
CheckSettingsRequest checkSettingsRequest = new CheckSettingsRequest();
LocationRequest locationRequest = new LocationRequest();
checkSettingsRequest.setLocationRequest(locationRequest);
checkSettingsRequest.setAlwaysShow(false);
checkSettingsRequest.setNeedBle(false);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(checkSettingsRequest.getLocationRequest())
.setAlwaysShow(checkSettingsRequest.isAlwaysShow())
.setNeedBle(checkSettingsRequest.isNeedBle());
settingsClient.checkLocationSettings(builder.build())
.addOnCompleteListener(new OnCompleteListener<LocationSettingsResponse>() {
#Override
public void onComplete(Task<LocationSettingsResponse> task) {
if (task != null && task.isSuccessful()) {
LocationSettingsResponse response = task.getResult();
if (response == null) {
return;
}
LocationSettingsStates locationSettingsStates =
response.getLocationSettingsStates();
stringBuilder.append(",\nisLocationPresent=")
.append(locationSettingsStates.isLocationPresent());
stringBuilder.append(",\nisLocationUsable=")
.append(locationSettingsStates.isLocationUsable());
stringBuilder.append(",\nisNetworkLocationUsable=")
.append(locationSettingsStates.isNetworkLocationUsable());
stringBuilder.append(",\nisNetworkLocationPresent=")
.append(locationSettingsStates.isNetworkLocationPresent());
stringBuilder.append(",\nisHMSLocationUsable=")
.append(locationSettingsStates.isHMSLocationUsable());
stringBuilder.append(",\nisHMSLocationPresent=")
.append(locationSettingsStates.isHMSLocationPresent());
LocationLog.i(TAG, "checkLocationSetting onComplete:" + stringBuilder.toString());
}
}
})
.addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(Exception e) {
LocationLog.i(TAG, "checkLocationSetting onFailure:" + e.getMessage());
int statusCode = 0;
if (e instanceof ApiException) {
statusCode = ((ApiException) e).getStatusCode();
}
switch (statusCode) {
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
android.util.Log.i(TAG,
"Location settings are not satisfied. Attempting to upgrade "
+ "location settings ");
try {
// Show the dialog by calling startResolutionForResult(), and check the
// result in onActivityResult().
if (e instanceof ResolvableApiException) {
ResolvableApiException rae = (ResolvableApiException) e;
rae.startResolutionForResult(CheckSettingActivity.this, 0);
}
} catch (IntentSender.SendIntentException sie) {
android.util.Log.i(TAG, "PendingIntent unable to execute request.");
}
break;
default:
break;
}
}
});
} catch (Exception e) {
LocationLog.i(TAG, "checkLocationSetting exception:" + e.getMessage());
}
}
}.start();
}
The execution results when “network location service” is turned on and off are shown below. It shows the state with true and false respectively.
In some phone, LocationSettings interface may not be able to get the exact state.
You can set the Priority to be PRIORITY_BALANCED_POWER_ACCURACY and use requestLocationUpdatesWithCallback interface to get location update.
If the network location is not enabled, you will get the error code NETWORK_LOCATION_SERVICES_DISABLED 10105.
Then it means the switch is not enabled.
I'm trying to write an infinite length response body and detect when a client disconnects so I can stop writing. I'm used to getting socket exceptions or similar when a client closes the connection but that doesn't seem to be happening when writing directly to Response.Body. I can close the client applications and the server side just keeps on writing. I've included the relevant code below. It's entirely possible there is a better way to do it but this came to mind. Basically I have a live video feed which should go on forever. I'm writing to ResponseBody as chunked content (No content length, flushing after each video frame). The video frames are received via an event callback from elsewhere in the program so I'm subscribing to the events in the controller method and then forcing it to stay open with the await Task.Delay loop so the Response stream isn't closed. The callback for H264PacketReceived is formatting the data as a streaming mp4 file and writing it to the Response Stream. This all seems to work fine, I can play the live stream with ffmpeg or chrome, but when I close the client application I don't get an exception or anything. It just keeps writing to the stream without any errors.
public class LiveController : ControllerBase
{
[HttpGet]
[Route("/live/{cameraId}/{stream}.mp4")]
public async Task GetLiveMP4(Guid cameraId, int stream)
{
try
{
Response.StatusCode = 200;
Response.ContentType = "video/mp4";
Response.Headers.Add("Cache-Control", "no-store");
Response.Headers.Add("Connection", "close");
ms = Response.Body;
lock (TCPVideoReceiver.CameraStreams)
{
TCPVideoReceiver.CameraStreams.TryGetValue(cameraId, out cameraStream);
}
if (this.PacketStream == null)
{
throw new KeyNotFoundException($"Stream {cameraId}_{stream} not found");
}
else
{
connected = true;
this.PacketStream.H264PacketReceived += DefaultStream_H264PacketReceived;
this.PacketStream.StreamClosed += PacketStream_StreamClosed;
}
while(connected)
{
await Task.Delay(1000);
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
finally
{
connected = false;
this.PacketStream.H264PacketReceived -= DefaultStream_H264PacketReceived;
this.PacketStream.StreamClosed -= PacketStream_StreamClosed;
}
}
private bool connected = false;
private PacketStream PacketStream;
private Mp4File mp4File;
private Stream ms;
private async void PacketStream_StreamClosed(PacketStream source)
{
await Task.Run(() =>
{
try
{
Console.WriteLine($"Closing live stream");
connected = false;
ms.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
});
}
private async void DefaultStream_H264PacketReceived(PacketStream source, H264Packet packet)
{
try
{
if (mp4File == null && packet.IsIFrame)
{
mp4File = new Mp4File(null, packet.sps, packet.pps);
var _p = mp4File.WriteHeader(0);
await ms.WriteAsync(mp4File.buffer, 0, _p);
}
if (mp4File != null)
{
var _p = mp4File.WriteFrame(packet, 0);
var start = mp4File._moofScratchIndex - _p;
if (_p > 0)
{
await ms.WriteAsync(mp4File._moofScratch, start, _p);
await ms.FlushAsync();
}
}
return;
}
catch (Exception ex)
{
connected = false;
Console.WriteLine(ex.ToString());
}
}
Answering my own question.
When the client disconnects mvc core sets the cancellation token HttpContext.RequestAborted
By monitoring and/or using that cancellation token you can detect a disconnect and clean everything up.
That said, the entire design can be improved by creating a custom stream which encapsulates the event handling (producer/consumer). Then the controller action can be reduced to.
return File(new MyCustomStream(cameraId, stream), "video/mp4");
The File Method already monitors the cancellation token and everything works as you'd expect.
I have installed SenseNet version 6.5 (Code from codeplex). Wanted to upload the files in content repositry using Sensenet Client API, unfortunately it is not working with bulk upload.
string [] fileEntries = Directory.GetFiles(#"C:\Users\conyna\Downloads\Chirag");
foreach (string fileName in fileEntries)
{
using (Stream fs = File.OpenRead(fileName))
{
string fn = Path.GetFileName(fileName);
Task<SenseNet.Client.Content> x = SenseNet.Client.Content.UploadAsync("/Root/Sites/Default_Site/workspaces/(apps)/DocumentLibrary", fn, fs);
}
}
There are two problems with the code above:
you have to 'await' for async methods. Currently you start the task with the UploadAsync method, but you do not wait for it to finish, which casuses problems, because the file stream closes immediately after starting the upload task. Please upload files in an async way (of course you'll have to make your caller method async too, but that is the point of using an async api):
await Content.UploadAsync(...)
You may also consider using the Importer class in the client, it is able to import full directory structures.
You are trying to upload into an (apps) folder, which is not a correct target, that was designed to contain applications (mostly pages). It would be better if you uploaded into a document library in a workspace, for example:
/Root/Sites/Default_Site/workspaces/Document/SampleWorkspace/DocumentLibrary
We created a small application with SN ClientLibrary. I think, you can use this application/information/code.
This application can upload entire folders via Client Libray. Please check it out my Github repository: https://github.com/marosvolgyiz/SNClientLibraryUploader
There is relevant upload method:
public async Task Upload()
{
try
{
Console.WriteLine("Initilization...");
ClientContext.Initialize(new[] { sctx });
Console.WriteLine("Upload Started");
//Is Parent exists
var content = await Content.LoadAsync(Target);
if (content != null)
{
//Uploading files
var tasks = new List<Task>();
foreach (var file in Files)
{
string fileTargetFolder = Target + file.DirectoryName.Replace(Source, "").Replace(BaseDirectory, "").Replace("\\", "/");
var fileTargetContentFolder = await Content.LoadAsync(fileTargetFolder);
if (fileTargetContentFolder == null)
{
if (CreateFolderPath(Target, file.DirectoryName.Replace(Source, "")))
{
fileTargetContentFolder = await Content.LoadAsync(fileTargetFolder);
Console.WriteLine("#Upload file: " + file.FullName);
tasks.Add(Content.UploadAsync(fileTargetContentFolder.Id, file.Name, file.OpenRead()));
LoggerClass.LogToCSV("File uploaded", file.Name);
}
else
{
LoggerClass.LogToCSV("File target folder does not exist or you do not have enough permission to see! File can not be uploaded. ", file.Name);
}
}
else
{
Console.WriteLine("#Upload file: " + file.FullName);
tasks.Add(Content.UploadAsync(fileTargetContentFolder.Id, file.Name, file.OpenRead()));
LoggerClass.LogToCSV("File uploaded", file.Name);
}
}
await Task.WhenAll(tasks);
}
else
{
Console.WriteLine("Target does not exist or you do not have enough permission to see!");
LoggerClass.LogToCSV("Target does not exist or you do not have enough permission to see!");
}
Console.WriteLine("Upload finished.");
}
catch (Exception ex)
{
LoggerClass.LogToCSV(ex.Message);
}
}
I hope my answer is helpful to you.
Br,
maros
Guys I have gone from Lollypop to Nougat and am trying to get my camera to take a picture in my app
I understand you now have to grant permissions at run time and have tried the following
static final Integer CAMERA = 0x5;
public void onCreate(Bundle savedInstanceState) {
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
askForPermission(Manifest.permission.CAMERA,CAMERA);
}
private void askForPermission(String permission, Integer requestCode) {
Toast.makeText(this, permission, Toast.LENGTH_SHORT).show();
if (ContextCompat.checkSelfPermission(newstart.this, permission) != PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(newstart.this, permission)) {
//This is called if user has denied the permission before
//In this case I am just asking the permission again
ActivityCompat.requestPermissions(newstart.this, new String[]{permission}, requestCode);
} else {
ActivityCompat.requestPermissions(newstart.this, new String[]{permission}, requestCode);
}
} else {
Toast.makeText(this, "" + permission + " is already granted.", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if(ActivityCompat.checkSelfPermission(this, permissions[0]) == PackageManager.PERMISSION_GRANTED){
Toast.makeText(this, "Permission check", Toast.LENGTH_SHORT).show();
switch (requestCode) {
//Location
case 1:
break;
//Write external Storage
case 3:
break;
//Read External Storage
case 4:
Intent imageIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(imageIntent, 11);
break;
//Camera
case 5:
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, 12);
}
break;
}
Toast.makeText(this, "Permission granted", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show();
}
}
This is the first activity in my app on startup and no matter what I try It keeps toasting permission denied and will not let me grant permissions
If I try just to take a photo it crashes the app so I know I need to grant permission to use camera
Any Ideas where I'm going Wrong
Any help appreciated
Mark
file:// is not allowed anymore.
You should send the URI through content:// scheme instead which is the URI scheme for Content Provider.
From Developer Guide
you can also change the target SDK from 24 to 23 it will fix it.(not recommended)
I've run into a bit of an issue with the iPhone simulator when trying to access a WCF REST service.
I've asked the question on the Xamarin forums, but no joy.
Some context:
I have a PCL for a Xamarin cross platform project, in VS 2012.
I use the Portable Microsoft HttpClient package and the Json.NET package.
I have a pretty simple WCF REST service sitting in the background.
When testing
I can access the service fine from a browser on the dev machine.
I can access it fine using a console application going via the PCL.
I can access it fine via the app, from a real android device on the WiFi network of
the same corporate network.
I can access it fine from Safari on the build Mac.
I can access it fine from Safari on the iPhone simulator on the build Mac.
The issue is, as soon as I try to access the service via the app on the iPhone simulator, I get a 407, Proxy Access Denied error.
Here is the code I'm using to set up the connection:
private static HttpRequestMessage PrepareRequestMessage(HttpMethod method, string baseUri,
string queryParameters, out HttpClient httpClient, string bodyContent)
{
var finalUri = new Uri(baseUri + queryParameters);
var handler = new HttpClientHandler();
httpClient = new HttpClient(handler);
var requestMessage = new HttpRequestMessage(method, finalUri);
if (handler.SupportsTransferEncodingChunked())
{
requestMessage.Headers.TransferEncodingChunked = true;
}
if (method == HttpMethod.Post || method == HttpMethod.Put)
{
requestMessage.Content =
new StringContent(bodyContent, Encoding.UTF8, "application/json");
}
return requestMessage;
}
That code gives me the 407 error.
I have tried setting the proxy by using various combinations of SupportsProxy and SupportsUseProxy. (Both returning false from the simulator.)
I've tried forcing the proxy settings regardless. I've tried setting the credentials on the handler itself. I've tried playing with the UseDefaultCredentials and UseProxy flags. I've also tried setting the IfModifiedSince value in the message header. I've tried using the PortableRest package as well.
All of that only seemed to make things worse. Where I was initially getting the 407 error, the call to httpClient.GetAsync would just immediately return null.
I am at a bit of a loss here, so any help would be greatly appreciated.
PS. For completeness, the rest of the surrounding code that makes the call: (please forgive crappy exception handling, I'm still playing around with the errors)
public static async Task<T> SendRESTMessage<T>(HttpMethod method, string baseUri,
string queryParameters, T contentObject)
{
HttpClient httpClient;
var payload = string.Empty;
if (contentObject != null)
{
payload = JsonConvert.SerializeObject(contentObject);
}
var requestMessage =
PrepareRequestMessage(method, baseUri, queryParameters, out httpClient, payload);
HttpResponseMessage responseMessage = null;
try
{
if (method == HttpMethod.Get)
{
responseMessage = await httpClient.GetAsync(requestMessage.RequestUri);
}
else
{
responseMessage = await httpClient.SendAsync(requestMessage);
}
}
catch (HttpRequestException exc)
{
var innerException = exc.InnerException as WebException;
if (innerException != null)
{
throw new Exception("Unable to connect to remote server.");
}
}
return await HandleResponse<T>(responseMessage);
}
private static async Task<T> HandleResponse<T>(HttpResponseMessage responseMessage)
{
if (responseMessage != null)
{
if (!responseMessage.IsSuccessStatusCode)
{
throw new Exception("Request was unsuccessful");
}
var jsonString = await responseMessage.Content.ReadAsStringAsync();
var responseObject = JsonConvert.DeserializeObject<T>(jsonString);
return responseObject;
}
return default(T);
}
This was my attempt at implementing IWebProxy quick and dirty, which I think could have made things worse:
public class MyProxy : IWebProxy
{
private System.Net.ICredentials creds;
public ICredentials Credentials
{
get
{
return creds;
}
set
{
creds = value;
}
}
public Uri GetProxy(Uri destination)
{
return new Uri("proxy addy here");
}
public bool IsBypassed(Uri host)
{
return true;
}
}
Thanks again for taking the time to read my question.
So I finally got it working.
Turns out it was something really stupid, but being new to iOS mobile dev and the fact that the service worked via Safari on the simulator threw me for a loop.
I read that the simulator uses the proxy settings as defined on the Mac. So I went to the network settings and added the service address to the proxy bypass list.
Works like a charm now.
If anybody feels there is a better way to do this, please add your opinions.