Hi I'm developing J2ME application and I'm interested that
is it possible to get GPS time (time is sent by GPS sattelites)?
how to get it?
The Location class has method getTimestamp() but I'm not sure if it returns satellite fix time.
The Location class has method getExtraInfo(String). If you call it with application/X-jsr179-location-nmea you will get NMEA string of current fix. There is definitely info about satellite fix time.
Could you not return the coordinates using javax.microedition.location.Coordinates
You could then work out the current time in that timezone given the current coordinates?
Related
I'm using the SpotifyAPI-NET on GitHub from JohnnyCrazy to play and pause songs on my Spotify desktop client. This works fine.
Now I want to change the playing position of the currently playing song. So I only want to say something like "SetPlayingPosition(64)" to play the current song from position "01:04". It seems that the SpotifyLocalAPI didn't support this feature.
To play and pause a song the API uses a message with the following format:
http://127.0.0.1:4381/remote/pause.json?pause=true&ref=&cors=&_=1520448230&oauth=oauth&csrf=csrf
I tried to find a summary of possible commands in this format, but I didn't find anything.
Is there something like http://127.0.0.1:4381/remote/seek.json... that I can use to seek to a specific position?
EDIT:
I tried to write my own method in the RemoteHandler class in the local portion of the SpotifyAPI. With this method I can set the position in the current playback.
Here's my code:
internal async Task SendPositionRequest(double playingPositionSec) //The desired playback position in seconds
{
StatusResponse status = GetNewStatus(); //Get the current status of the local desktop API
string trackUri = "spotify:track:" + status.Track.TrackResource.ParseUri().Id; //The URI of the current track
TimeSpan playingPositionTimeSpan = TimeSpan.FromSeconds(playingPositionSec);
string playingPosStr = playingPositionTimeSpan.ToString(#"mm\:ss"); //Convert the playingPosition to a string (Format mm:ss)
string playingContext = "spotify:artist:1EfwyuCzDQpCslZc8C9gkG";
await SendPlayRequest(trackUri + "#" + playingPosStr, playingContext);
if (!status.Playing) { await SendPauseRequest(); }
}
I need to call the SendPlayRequest() method with the correct playingContext because when the current song is part of a playlist and you call SendPlayRequest() without the context, the next song isn't from the playlist anymore.
But you can see that I use a fixed context at the moment.
So my question is now: How can I get the context (playlist, artist, ...) of the currently played song with the SpotifyLocalAPI?
The SeekPlayback method of the library you mentioned lets you seek through playback on whatever device your user is listening on. You can find the docs here.
Seeking playback is not currently possible using the Spotify Local API portion of that library.
I have a EmbeddedMediaPlayerComponent and I want to check before playing if the video has audio track.
The getMediaPlayer().getAudioTrackCount() method works fine but only when I play the video and I am inside the public void playing(MediaPlayer mp) event.
I also tryed
getMediaPlayer().prepareMedia("/path/to/media", null);
getMediaPlayer().play();
System.out.println("TRACKS: "+getMediaPlayer().getAudioTrackCount());
But it does not work. it says 0.
I also tryed:
MediaPlayerFactory factory = new MediaPlayerFactory();
HeadlessMediaPlayer p = factory.newHeadlessMediaPlayer();
p.prepareMedia("/path/to/video", null);
p.parseMedia();
System.out.println("TRACKS: "+p.getAudioTrackCount());
But it also says -1. Is there a way I can do that ? or using another technique?
The track count is not metadata, so using parseMedia() here is not going to help.
parseMedia() will work to get e.g. ID3 tag data, title, artist, album, and so on.
The track data is usually not available until after the media has started playing, since it is the particular decoder plugin that knows how many tracks there are. Even then, it is not always available immediately after the media has started playing, sometimes there's an indeterminate delay (and no LibVLC event).
In applications where I need the track information before playing the media, I usually would use something like the native MediaInfo application and parse the output - this has a plain-text out format, or an XML output format and IIRC the newer versions have a JSON output format. The downside is you have to launch a native process to do this, I use CommonsExec for things like this. It's pretty simple and does work even though it's not a pure Java solution, but neither is vlcj!
A slight aside if you did actually want the meta data there is an easier way, just use
this method on the MediaPlayerFactory:
public MediaMeta getMediaMeta(String mediaPath, boolean parse);
This gives you the meta data without having to prepare, play or parse media.
I am new in J2ME app development field. I am developing GPS based app using Nokia Maps for series 40 mobiles. I want such emulator which provide GPS(to retrieve & set current coordinates & many other purposes). I search a lot on google but I didn't found such emulator.... even what ever emulators provide by Nokia SDKs; they also don't have GPS capability... Then how should I get such emulator??
You can download the latest Nokia IDE (which includes the Nokia Maps Plugin) here:
Emulator download
The emulator associated with the SDK includes tools to simulate JSR-179 location calls (e.g. Cell-Id/GPS), you can play back coordinates for a saved file and receive them at regular intervals. Look at the emulator's Tools > Route Editor menu.
The confusion here is the difference between GPS positioning and Cell-Id positioning. There are currently no series 40 mobiles (that I know of) with a GPS unit - hence positioning will need to be done by Cell-ID - In this case the only way to retrieve frequent location updates in the Cell-ID scenario is to call the getLocation() method within a repeating loop. Retrieving location objects via the locationUpdated() method, can only be done in a GPS-based location retrieval.
In summary you can get a location from any Java ME phone supporting JSR-179, you won't be using GPS though.
To get a location use the following:
cellIdLocator = getCellIdProvider();
cellIdLocator.getLocation(DEFAULT_TIMEOUT);
Where the cell-id provider can be held in a singleton
private LocationProvider cellIdLocator;
public LocationProvider getCellIdProvider() throws LocationException {
if (cellIdLocator == null) {
int[] methods = {
Location.MTA_ASSISTED | Location.MTE_CELLID
| Location.MTY_NETWORKBASED};
cellIdLocator = LocationUtil.getLocationProvider(methods, null);
}
return cellIdLocator;
}
is it possible to detect vibration on the iPhone? I'm trying to figure out how to detect when the user smacks a desk or table when the phone is sitting on it. I remember reading somewhere you could detect a smack on a wooden table using the mic and AVFoundation. Any ideas?
Thanks
if you go down the microphone route, something like this might do the trick:
//somewhere during setup call this line
[anAVAudioRecorder setMeteringEnabled:YES];
//then in a method used to poll the audioMeter
[anAVAudioRecorder updateMeters];
averagePower = [anAVAudioRecorder averagePowerForChannel:0];
if (averagePower > threshold ) {
[musicPlayerClass play];
}
Hello
I am using mgtwitterengine in iphone to call twitter API. I want to retrive followers name
in my iphone.
I used textfield.text=[_engine getFollowersIncludingCurrentStatus:YES]; but it is not showing correct result. it only show some alphabets...
could anyone tell me how to do this.
you are using
NSLog(#"%#",[_engine getFollowersIncludingCurrentStatus:YES]);
getFollowersIncludingCurrentStatus not responding the result, it returns connection identifier which is DF387EE5-05CE-40E3-A12D-4D016C581233 in your case
your API response will come in this method
- (void)userInfoReceived:(NSArray *)userInfo forRequest:(NSString *)identifier
this is delegate method you have to add this in your class.
[_engine getFollowersIncludingCurrentStatus:YES];
use like this it may help you, i got the values and printing on console