I'd like to get access to my currently running applications applicationDescriptor object. I want this so that I can get the current version number and, on the initial screen have a title like "MyApp Version x.x.x" where I get x.x.x from the ApplicationDescriptor.getVersion()
One way that I've found is to use:
ApplicationManager manager = ApplicationManager.getApplicationManager();
ApplicationDescriptor[] descriptors = manager.getVisibleApplications();
//Loop round descriptors then use...
ApplicationDescriptor myApp = manager.getProcessId(descriptors[x]);
Using the loop to check all applications seems a bit long winded to me, i'm hoping that there is an easier route.
Thanks
Got it:
ApplicationDescriptor.currentApplicationDescriptor().getVersion()
Related
I would like to turn off vlc's hardware acceleration option to avoid some lagging issue caused by a graphic card's driver bug. I tried to pass in that option in the prepareMedia method. That didn't help (as it would when I did it through command line: vlc --no-overlay 'path-to-video'). It actually even seemed to make the playback a bit more laggy. Below is part of my code to set up the player. I actually tried playMedia("path-to-video","--no-overlay") and that didn't work either.
mediaPlayerComponent = new EmbeddedMediaPlayerComponent();
player = mediaPlayerComponent.getMediaPlayer();
...
player.prepareMedia("path-to-video","--no-overlay");
Some of those options must be passed when creating the MediaPlayerFactory rather than when playing the media - as to why it's like this, well it's just how LibVLC works.
If you're using EmbeddedMediaPlayerComponent you can do something like this to supply those options:
mediaPlayerComponent = new EmbeddedMediaPlayerComponent() {
protected String[] onGetMediaPlayerFactoryArgs() {
return new String[] {"--no-overlay"};
}
}
Note that this will replace the default media player factory arguments so you might like to specify some other ones too - these are the defaults:
protected static final String[] DEFAULT_FACTORY_ARGUMENTS = {
"--video-title=vlcj video output",
"--no-snapshot-preview",
"--quiet-synchro",
"--sub-filter=logo:marq",
"--intf=dummy"
};
So that is how you set such native VLC options, but whether this particular option will do what you actually want (and without any other side effects) is another matter.
I use Grails 2.0.0 in NetBeans with the Geolocation support plugin version 0.4
using this plugin, I can display the map with my position marker, but I get an exception when I try to calculate the distance between two positions:
No such property: GeoUtils for class: org.grails.plugin.geolocation.GeolocationService
This is a piece of my code:
Coordinates f = new Coordinates()
f.setAltitude(31.634227951365595)
f.setLongitude(-8.00504207611084)
Coordinates t = new Coordinates()
t.setAltitude(31.63271158235246)
t.setLongitude(-7.999967336654663)
GeoPosition positionFrom = new GeoPosition()
positionFrom.setCoords(coordinatesFrom)
GeoPosition p = new GeoPosition()
p.setCoords(coordinatesTo)
GeolocationService g = new GeolocationService()
double test = g.distance(positionFrom, positionTo)
The probleme is in grails-app/services/org/grails/plugin/geolocation/GeolocationService.groovy:
double distance(GeoPosition positionFrom, GeoPosition positionTo) {
LatLngTool.distance(**GeoUtils**.convertGeopositionToLatLng(positionFrom), GeoUtils.convertGeopositionToLatLng(positionTo), getLengthUnit())
}
The geolocation plugin is broken. Till the author fixes it, you may want to fork it yourself and fix it for your application
In GeolocationService.groovy import the GeoUtils class
import org.grails.plugin.geolocation.utils.GeoUtils
Then in BuildConfig.groovy, refer to this modified version instead,
grails.plugin.location.geolocation = "<local_path_to>/geolocation"
afaik, that should be enough to proceed.
Thinks Mr Aldrin for the response, really there is a lot of errors in the source code of this plugin I emailed the developer but he didn't answer me. but I could solve all of thos problemes and i can now use it.
If there is someone who needs help at this level, I can send to him the corrected version .. haj.abdel( at ) gmail
I am developing a mobile application using phonegap, Initially I have developed using WEBSQL but now I m planning to move it on INDEXDB. The problem is it does not have direct support on IOS , so on doing much R&D I came to know using IndexedDB Polyfil we can implement it on IOS too
http://blog.nparashuram.com/2012/10/indexeddb-example-on-cordova-phonegap.html
http://nparashuram.com/IndexedDBShim/
Can some please help me how to implement this as there are not enough documentation for this and I cannot figure out a any other solution / api except this
I have tested this on safari 5.1.7
Below is my code and Error Image
var request1 = indexedDB.open(dbName, 5);
request1.onsuccess = function (evt) {
db = request1.result;
var transaction = db.transaction(["AcceptedOrders"], "readwrite");
var objectStore = transaction.objectStore("AcceptedOrders");
for (var i in data) {
var request = objectStore.add(data[i]);
request.onsuccess = function (event) {
// alert("am again inserted")
// event.target.result == customerData[i].ssn;
};
}
};
request1.onerror = function (evt) {
alert("IndexedDB error: " + evt.target.errorCode);
};
Error Image
One blind guess
Maybe your dbName contains illegal characters for WebSQL database names. The polyfill doesn't translate your database names in any kind. So if you create a database called my-test, it would try to create a WebSQL database with the name my-test. This name is acceptable for an IndexedDB database, but in WebSQL you'll get in trouble because of the - character. So your database name has to match both, the IndexedDB and the WebSQL name conventions.
... otherwise use the debugger
You could set a break point onto your alert(...); line and use the debugger to look inside the evt object. This way you may get either more information about the error itself or more information to share with us.
To do so, enable the development menu in the Safari advanced settings, hit F10 and go to Developer > Start debugging JavaScript (something like that, my Safari is in a different language). Now open then "Scripts" tab in the developer window, select your script and set the break point by clicking on the line number. Reload the page and it should stop right in your error callback, where you can inspect the evt object.
If this doesn't help, you could get the non-minified version of the polyfill and try set some breakpoints around their open function to find the origin of this error.
You could try my open source library https://bitbucket.org/ytkyaw/ydn-db/wiki/Home. It works on iOS and Android.
On many sites I saw printed out my current city where I am (eg "Hello to Berlin."). How they do that? What everything is needed for that?
I guess the main part is here javascript, but what everything I need for implementing something like this to my own app? (or is there some gem for Rails?)
Also, I would like to ask for one thing yet - I am interesting in the list of states (usually in select box), where user select his state (let's say Germany), according to the state value are in another select displayed all regions in Germany and after choosing a region are displayed respective cities in the selected region.
Is possible anywhere to obtain this huge database of states/cities/regions? Would be interesting to have something similar in our app, but I don't know, where those lists get...
You need a browser which supports the geolocation api to obtain the location of the user (however, you need the user's consent (an example here) to do so (most newer browsers support that feature, including IE9+ and most mobile OS'es browsers, including Windows Phone 7.5+).
all you have to do then is use JavaScript to obtain the location:
if (window.navigator.geolocation) {
var failure, success;
success = function(position) {
console.log(position);
};
failure = function(message) {
alert('Cannot retrieve location!');
};
navigator.geolocation.getCurrentPosition(success, failure, {
maximumAge: Infinity,
timeout: 5000
});
}
The positionobject will hold latitude and longitude of the user's position (however this can be highly inaccurate in less densely populated areas on desktop browsers, as they do not have a GPS device built in). To explain further: Here in Leipzig in get an accuracy of about 300 meters on a desktop computer - i get an accuracy of about 30 meters with my cell phone's GPS device.
You can then go on and use the coordinates with the Google Maps API (see here for reverse geocoding) to lookup the location of the user. There are a few gems for Rails, if you want. I never felt the need to use them, but some people seem to like them.
As for a list of countries/cities, we used the data obtainable from Geonames once in a project, but we needed to convert it for our needs first.
Internet Service Providers buy up big chunks of IP addresses, so what you're most likely seeing is a backtrace your IP to a known ISP. They have a database with ISP's and their location in the world, so they can try to see where you're from. You could try to use a site like http://www.ipaddresslocation.org/ to do your work. If you look around, there is bound to be a site that lets you enter an IP and get a location, so you just send a POST request to that site with your visitor's IP and scrape the location from the response.
Alternatively you could try to look for an ISP database that has location and what chunks of the IP range they have been allocated. You could probably find one for money, but a free one might be harder to find.
Alternatively, check out this free database http://www.maxmind.com/app/geolite
I've found getCurrentPosition() to often be inaccurate since it doesn't spend a lot of time waiting on the GPS to acquire a good accuracy. I wrote a small piece of JavaScript that mimics getCurrentPosition() but actually uses watch position and monitors the results coming back until they are better accuracy.
Here's how it looks:
navigator.geolocation.getAccurateCurrentPosition(onSuccess, onError, {desiredAccuracy:20, maxWait:15000});
Code is here - https://github.com/gwilson/getAccurateCurrentPosition
Correc syntax would be :
navigator.geolocation.getCurrentPosition(successCallBack, failureCallBack);
Use :
navigator.geolocation.getCurrentPosition(
function(position){
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
console.log("Latitude : "+latitude+" Longitude : "+longitude);
},
function(){
alert("Geo Location not supported");
}
);
If you prefer to use ES6 and promises here is another version
function getPositionPromised() {
function successCb(cb) {
return position => cb(position);
}
function errorCb(cb) {
return () => cb('Could not retrieve geolocation');
}
return new Promise((resolve, reject) => {
if (window.navigator.geolocation) {
navigator.geolocation.getCurrentPosition(successCb(resolve), errorCb(reject));
} else {
return reject('No geolocation support');
}
})
}
And you can use it like this:
getPositionPromised()
.then(position => {/*do something with position*/})
.catch(() => {/*something went wrong*/})
Here is an another api to find out the location in PHP,
http://ipinfodb.com/ip_location_api.php
I have been using geoip.maxmind.com for quite a while and it works 100%. It can be accessed via HTTP requests.
i'm create a dating website using symfony 1.4 (it's my first project using symfony). the problem is there server freezes if there is only 10 or less users online. i tryied optimizing my js, css, sprites using yslow i got grade A but still the problem is always there. that's why i think the way i build the application might be wrong so here is the website naijaconnexion.com i'm asking u for advices and things to do so i overcome this problem
If i wasn't clear enough just ask, if you want cpanel admin access i'll post it
i realy realy needs your help
for instance i have this code on my home page action does it seems ok or it needs to be optimized and how
$this->me = $this->getUser()->getGuardUser()->getPerson();
$this->cities = Doctrine_Core::getTable('City')->findByDql("zipcode=''");
$this->countries = Doctrine_Core::getTable('City')->findByDql("zipcode='10'");
$this->contacts = $this->me->getContacts();
$this->favorites = $this->me->getFavorites();
$this->matches = $this->me->getMatches();
$this->pager = new sfDoctrinePager('Conversation', sfConfig::get('app_home_conversations_per_page'));
$this->pager->setQuery($this->me->getConversationsQuery());
$this->pager->setPage($request->getParameter('page', 1));
$this->pager->init();
without HYDRATE_ARRAY
i can do this
if i use HYDRATE_ARRAY
will i be able to do stuff like $this->contacts[0]['username'];
help please
The problem is doctrine...
Try to fetch the needed values as array and set a limit!
How many objects are returned by the following queries:
$this->cities = Doctrine_Core::getTable('City')->findByDql("zipcode=''");
$this->countries = Doctrine_Core::getTable('City')->findByDql("zipcode='10'");
$this->contacts = $this->me->getContacts();
$this->favorites = $this->me->getFavorites();
$this->matches = $this->me->getMatches();
? Do not forget that they are object with references to other objects!
And yes, this will work $this->contacts[0]['username'];.
if you join the tables with the doctrine query, you can access related entities too - without executing additional queries.
$this->contacts = Doctrine_Core::getTable('Contact')
->createQuery('c')
->leftJoin('c.Users u')
->addWhere('...')
->execute(array(), Doctrine_Core::HYDRATE_ARRAY);
$this->contacts[0]['Users'][0]['username']