Develop Reference

how do i get Android.Media.SetPreferredDevice() to work

So making a mobile application that works on UWP, IOS and Android but since not all librarys work on every platform I'm using the library based on what device is used by
if (Device.RuntimePlatform == Device.Android) { }
And I'm currently only working on the Android part of the application.
I'm using Android.Media to play a single audio file out of multiple speakers. And to do that I'm using a Picker that has the available audio output devices. This part works.
But I'm getting a error while trying to select the PreferredDevice:
Java.Lang.NoSuchMethodError: 'no non-static method "Landroid/media/MediaPlayer;.setPreferredDevice(Landroid/media/AudioDeviceInfo;)Z"'
The code line that is giving the error is:
mediaPlayer1.SetPreferredDevice(audioDeviceInfo);
the full method that is being run is:
newoutput.SelectedIndexChanged += (changed, args) =>
{
Context context = Android.App.Application.Context;
AudioManager audioMan = (AudioManager)context.GetSystemService(Context.AudioService);
AudioDeviceInfo audioDeviceInfo = audioMan.GetDevices(GetDevicesTargets.Outputs)[newoutput.SelectedIndex];
mediaPlayer1.SetPreferredDevice(audioDeviceInfo);
};
I can't find many examples that use the method and they don't usually go with a mediaplayer that is created by button press.

You can use this code
private AudioDeviceInfo findAudioDevice(int deviceType) {
AudioManager manager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
AudioDeviceInfo[] adis = manager.getDevices(GET_DEVICES_OUTPUTS);
for (AudioDeviceInfo adi : adis) {
if (adi.getType() == deviceType) {
return adi;
}
}
return null;
}
Then set your input:
audioRecord.setPreferredDevice(findAudioDevice([newoutput.SelectedIndex]));

How to get Visual Studio Output Window content via EnvDTE (Non Package)

I'm writing an out of process console program that automate Visual Studio (2012).
i need to get the content of the output pane either read it at once or preferably register to a notification on each line added to the output window.
I've seen some examples that only apply when writing a package, but they won't apply when doing so for an out of process program.
the big problem at the moment is that i can't get the output window service via GetService of a Service Provider. it always returns null.
I'm not sure i can get it if i'm not writing a package.

This seems to work for me
public string GetOutput()
{
const string buildOutputPaneGuid = "{1BD8A850-02D1-11D1-BEE7-00A0C913D1F8}";
const string vsWindowKindOutput = "{34E76E81-EE4A-11D0-AE2E-00A0C90FFFC3}";
var outputWindow = dte.Windows.Item(/*EnvDTE.Constants.*/vsWindowKindOutput);
var outputWindowDynamic = outputWindow.Object;
foreach(OutputWindowPane pane in outputWindowDynamic.OutputWindowPanes)
{
if (pane.Guid == buildOutputPaneGuid)
{
try
{
pane.Activate();
var sel = pane.TextDocument.Selection;
sel.StartOfDocument(false);
sel.EndOfDocument(true);
return sel.Text;
}
catch (Exception ex)
{
return null;
}
}
}
return null;
}

What need I do to get this code to work in a Portable Class Library?

I'm wondering if the Portable Class Library is even more restricted in functionality than the Compact Framework.
I'm trying to port a CF/Windows CE app (runs on a handheld device) to a Xamarin solution that will target Android, iOS, Windows Phone, and perhaps other things.
One of the problems I run into, though, is that this legacy code (which works under CF):
public static List<string> GetXMLFiles(string fileType, string startingDir)
{
const string EXTENSION = ".XML";
string dirName = startingDir;
// call it like so: GetXMLFiles("ABC", "\\"); <= I think the double-whack is what I need for Windows CE device...am I right?
var fileNames = new List<String>();
try
{
foreach (string f in Directory.GetFiles(dirName))
{
string extension = Path.GetExtension(f);
if (extension != null)
{
string ext = extension.ToUpper();
string fileNameOnly = Path.GetFileNameWithoutExtension(f);
if (fileNameOnly != null &&
((ext.Equals(EXTENSION, StringComparison.OrdinalIgnoreCase)) &&
(fileNameOnly.Contains(fileType))))
{
fileNames.Add(f);
}
}
}
foreach (string d in Directory.GetDirectories(dirName))
{
fileNames.AddRange(GetXMLFiles(fileType, d));
// from Brad Rem's answer here: http://stackoverflow.com/questions/22186198/why-is-this-function-returning-nothing-although-there-is-a-match/22186351?noredirect=1#22186351
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return fileNames;
}
...won't compile in the Xamarin/CPL solution. I get, "The name 'Directory' does not exist in the current context" and right-clicking that word does not afford a "resolve" option.
Is there a way to get PCL to recognize "Directory" or must I completely rewrite the code? If the latter, does anybody have any suggestions on what to do/use in its stead?
Relatedly, is there an URL that will show me what is [not] available in PCL and/or a site that will show how much of a provided block of code is "PCL-ready"?
UPDATE
The first image in this article is very illuminating. Later on, it specifically talks about "Directory" not being available in the PCL scenario.
UPDATE 2
I downloaded the PCLStorage package referenced by Daniel Plaisted below to allow me to access the file system within a PCL project.
Using the sample code at the start of the download page [http://pclstorage.codeplex.com/] as a starting point, I've gotten this far:
public async Task<List<string>> GetXMLFiles(string fileType, string startingDir)
{
const string EXTENSION = ".XML";
IFolder rootFolder = FileSystem.Current.LocalStorage;
IFolder folder = await rootFolder.GetFolderAsync(startingDir, CreationCollisionOption.OpenIfExists); //CreateFolderAsync(startingDir, CreationCollisionOption.OpenIfExists);
List<string> fileNames = await folder.GetFilesAsync(EXTENSION);
return fileNames;
}
...but "EXTENSION" as the arg to GetFilesAsync() is not right. I get with this, "Argument 1: cannot convert from 'string' to 'System.Threading.CancellationToken'"
So what need I do to get all the *.XML files the folder?
UPDATE 3
This compiles, but I'm not at all sure it's the right way to do it, besides the fact that it simply gets all the files from the folder, rather than just those that match "*.XML":
public async Task<List<IFile>> GetXMLFiles(string fileType, string startingDir)
{
const string EXTENSION = ".XML";
IFolder rootFolder = FileSystem.Current.LocalStorage;
IFolder folder = await rootFolder.GetFolderAsync(startingDir, System.Threading.CancellationToken.None);
IList<PCLStorage.IFile> fileNames = await folder.GetFilesAsync(System.Threading.CancellationToken.None);
return fileNames.ToList();
}

Since in a PCL I was unable to get a StreamWriter from a string (it required a stream), I created a simple interface to get some of the data from the platform implementation. You can also do this with DirectoryInfo and FileInfo.
https://github.com/sami1971/SimplyMobile/blob/master/Core/SimplyMobile.Text/IStreamLocator.cs
The implementation is really simple as well, only needs one single compiler flag for WP8:
https://github.com/sami1971/SimplyMobile/blob/master/WP8/SimplyMobile.Text.Platform/StreamLocator.cs
Recursively search for *.XML files:
private static void PrintDirectory(IStreamLocator locator, string dir)
{
foreach (var file in locator.GetFileNames(dir, "*.XML"))
{
System.Diagnostics.Debug.WriteLine(file);
}
foreach (var di in locator.GetFolderNames(dir, "*"))
{
PrintDirectory(locator, di);
}
}

Windows Phone applications do not use the file system of the operating
system and are restricted to using isolated storage to persist and
access files, so this namespace does not provide any additional
functionality.
http://msdn.microsoft.com/en-us/library/windowsphone/develop/system.io%28v=vs.105%29.aspx

Xamarin has a scanner which will give you a rough idea of the portability of your code: http://scan.xamarin.com/
For some guidance on how to deal with non-portable APIs from PCLs, see my blog post: How to Make Portable Class Libraries Work for You
For file IO in particular, you can try my PCL Storage library.

Another option is to use Shim if all your platforms are supported by it.
API coverage for file operations isn't exhaustive, but it gets you a long way. As a bonus, it also gives you access to a bunch of other stuff.

ResourceMap not found error when referencing a resource file within a portable class library

The problem I am facing has as follows:
I have developed a portable class library to encapsulate a service connection. Inside this class library there is a Resources.resw file containing strings. These strings are called only by methods of the class library (for example to override ToString() methods).
As I said this is a portable class library. If I reference it as a dll, or even as a project inside another solution, it gets built and compiles correctly. Then I make a call using a method of this library within my application, say
ClientFacadeConnector connector = new ClientFacadeConnector();
ICollection<SearchResult> results = null;
string message = string.Empty;
if (maxResults != -1) //Search with max Results
{
try
{
if (!contextQuery.Trim().Equals(string.Empty))
{
results = await connector.GetConnected().SearchAsync(contextQuery, query, maxResults);
message = "Search with ContextQuery " + contextQuery + ", Query " + query + ", max results " + maxResults.ToString();
}
else
{
results = await connector.GetConnected().SearchAsync(query, maxResults, true);
message = "...using normal Query search, Query " + query + ", max results " + maxResults.ToString();
}
}
catch (IQserException ex)
{
message = ex.Message;
}
}
if (results != null)
{
ICollection<LocalSearchResult> contentResults = new List<LocalSearchResult>();
foreach (SearchResult s in results)
{
var q = s.ToString();
var contentItem = await connector.GetConnected().GetContentAsync(s.ContentId);
LocalSearchResult lContent = new LocalSearchResult(contentItem);
lContent.Score = s.Score;
lContent.Relevance = s.Relevance;
lContent.MarkFullText(query);
contentResults.Add(lContent);
}
At the point where I call s.ToString() method, I get an error "Resource Map not found".
To explain where this comes from:
public static class AppResources
{
private static ResourceLoader resourceLoader;
static AppResources()
{
// Load local file Resources.resw by default
resourceLoader = new ResourceLoader();
}
public static string GetResources(string key)
{
if (string.IsNullOrEmpty(key))
throw new ArgumentNullException("key");
return resourceLoader.GetString(key);
}
}
and inside the overridden ToString() method there is code that looks as follows:
public override string ToString()
{
StringBuilder buf = new StringBuilder(AppResources.GetResources("InstrSearchResultContent"));
if (ContentId != -1)
{
buf.Append(AppResources.GetResources("StringContent") + " ID:" + ContentId.ToString() + " | ");
}
else
{
buf.Append(AppResources.GetResources("StringNo") + AppResources.GetResources("StringContent") + "ID" + " | ");
}
...
The resource file is called resources.resw and is the default resw file that ResourceLoader calls if no other is called.
Strangely enough, if I copy the resource file inside the client application locally, it is referenced correctly by all calls to the class library resource file and everything works.
This class library is supposed to be an SDK when finished. Do I need to distribute the resource file separately?
Such a problem I have never experienced with normal Class libraries and resx files. Resw is giving me the creeps..

It looks like you have to specify the name of the resource map when you create the ResourceLoader, like this:
resourceLoader = new ResourceLoader("Assembly/ResourceFile");
For example, if your class library was called "Company.Lib.dll", and your resource file was "Resources.resw", you would use:
resourceLoader = new ResourceLoader("Company.Lib/Resources");
This doesn't seem to be documented fully on MSDN - it suggests that you can just specify the name of your resource file, but it might be that that only works for resource files that are in the Windows Store application project. It was this page that showed me that, for libraries, you need to specify the assembly name as well.

I also had similar issue even with repeating all steps from How to load string resources.
The problem was that my Resources.resw file was empty. When I added some fake string to it all started working as expected.

I had a similar issue which i resolved by changing the Build Action of the resw file to PRIResource in the properties. I had renamed an existing resx to resw but the documentation doesn't mention that you also have to change the build action.

Accepted answer posted by #Rory MacLeod may no longer be true. I tried and VS warned that ResourceLoader(String) is deprecated. The following worked in my case:
var loader = ResourceLoader.GetForCurrentView();
string localName = loader.GetString("someKey");

I faced a similar issue when developing a UWP app with a class library.
So I have a /Strings/en-Us/Resource.resw file in my library.
ResourceLoader.GetForCurrentView().GetString("someKey");
gives an exception
new ResourceLoader("Company.Lib/Resources").GetString("someKey");
gives me a deprecation warning but works.
My solution which does not give a warning is this:
ResourceLoader.GetForViewIndependentUse("AssemblyNamespace/Resources").GetString("someKey");

C# SAPI in a web service

var speechEngine = new SpVoiceClass();
SetVoice(speechEngine, job.Voice);
var fileMode = SpeechStreamFileMode.SSFMCreateForWrite;
var fileStream = new SpFileStream();
try
{
fileStream.Open(filePath, fileMode, false);
speechEngine.AudioOutputStream = fileStream;
speechEngine.Speak(job.Script, SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak | SpeechVoiceSpeakFlags.SVSFDefault); //TODO: Change to XML
//Wait for 15 minutes only
speechEngine.WaitUntilDone((uint)new TimeSpan(0, 15, 0).TotalMilliseconds);
}
finally
{
fileStream.Close();
}
This exact code works in a WinForm app, but when I run it inside a webservice I get the following
System.Runtime.InteropServices.COMException was unhandled
Message="Exception from HRESULT: 0x80045003"
Source="Interop.SpeechLib"
ErrorCode=-2147201021
Does anyone have any ideas what might be causing this error? The error code means
SPERR_UNSUPPORTED_FORMAT
For completeness here is the SetVoice method
void SetVoice(SpVoiceClass speechEngine, string voiceName)
{
var voices = speechEngine.GetVoices(null, null);
for (int index = 0; index < voices.Count; index++)
{
var currentToken = (SpObjectToken)voices.Item(index);
if (currentToken.GetDescription(0) == voiceName)
{
speechEngine.SetVoice((ISpObjectToken)currentToken);
return;
}
}
throw new Exception("Voice not found: " + voiceName);
}
I have given full access to USERS on the folder C:\Temp where the file is to be written. Any help would be appreciated!

I don't think the System.Speech works in windows service. It looks like there is a dependency to Shell, which isn't available to services. Try interop with SAPI's C++ interfaces. Some class in System.Runtime.InteropServices may help on that.

Our naming convention requires us to use a non-standard file extension. This works fine in a Winforms app, but failed on our web server. Changing the file extension back to .wav solved this error for us.

Make sure you explicitly set the format on the SPFileStream object. ISpAudio::SetState (which gets called in a lower layer from speechEngine.Speak) will return SPERR_UNSUPPORTED_FORMAT if the format isn't supported.

I just got the webservice to spawn a console app to do the processing. PITA :-)