Is there any way to launch the android widgets list from activity? Some like on sample code:
Preference button = (Preference)findPreference("button");
button.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
#Override
public boolean onPreferenceClick(Preference arg0) {
Intent myIntent = new Intent();
myIntent.setClassName(packageName, className);
startActivity(myIntent);
return true;
}
});
or another way to access the list of widgets?
Related
There's a project called Web App Template (aka WAT - http://wat.codeplex.com/) that allows you to wrap a webapp as a Windows 8 / Windows Phone 8 application. I've done that to an app, now I'm trying to add the "rate my app" feature to it. I don't see where/if I can inject code for this component to be added.
I'm following a guide here: http://developer.nokia.com/community/wiki/Implement_%22Rate_My_App%22_in_under_60_seconds
I'm stuck at Step 5 - where do I add the Event Handler? There is no MainPage.xaml.cs and I don't see any similar files.
I imagine that WAT is calling another library to load a web browser. Is there some way I can inject an Event Handler and method into this library?
I suggest not to prompt the user with 'rate my app' thing in the first opening of the app as user should be given some time to see what the app looks like and how it functions. Therefore, keeping the number of app launches and asking to rate the app after some 5th - 10th launch of app will make more sense. Besides you should check if you already prompted the user to rate your app, if so never prompt again. (Otherwise you will piss them off with 'rate my app' thing)
In order to achieve this, you should at first keep the app launch count in app settings class.
The interface for storing any kind of setting:
public interface ISettingService
{
void Save();
void Save(string key, object value);
bool AddOrUpdateValue(string Key, object value);
bool IsExist(string key);
T Load<T>(string key);
T GetValueOrDefault<T>(string Key, T defaultValue);
}
The rating service class that consumes the above interface to store such count and settings:
public class RatingService
{
private const string IsAppRatedKeyName = "isApprated";
private const string TabViewCountKeyName = "tabViewCount";
private const bool IsAppratedDefault = false;
private const int TabViewCountDefault = 0;
private const int ShowRatingInEveryN = 7;
private readonly ISettingService _settingService;
[Dependency]
public RatingService(ISettingService settingService)
{
_settingService = settingService;
}
public void RateApp()
{
if (_settingService.AddOrUpdateValue(IsAppRatedKeyName, true))
_settingService.Save();
}
public bool IsNeedShowMessage()
{
return (_settingService.GetValueOrDefault(TabViewCountKeyName, TabViewCountDefault)%ShowRatingInEveryN) == 0;
}
public void IncreaseTabViewCount()
{
int tabCount = _settingService.GetValueOrDefault(TabViewCountKeyName, TabViewCountDefault);
if (_settingService.AddOrUpdateValue(TabViewCountKeyName, (tabCount + 1)))
_settingService.Save();
}
public bool IsAppRated()
{
return _settingService.GetValueOrDefault(IsAppRatedKeyName, IsAppratedDefault);
}
}
This is how you will run such functionality and prompt the user to rate the app (if previously not rated) anywhere in your project (mainpage or some other page where user launches some functionality):
private void RunRating()
{
if (!RatingService.IsAppRated() && RatingService.IsNeedShowMessage())
{
MessageBoxResult result = MessageBox.Show("Review the app?", "Would you like to review this awesome app?",
MessageBoxButton.OKCancel);
//show message.
if (result == MessageBoxResult.OK)
{
RatingService.RateApp();
new MarketplaceReviewTask().Show();
}
}
}
I have a list of theaters and I created a secondary tile from my application to navigate directly to specific theater. I pass the id of the theater in query string :
I load the theaters from a WCF service in the file "MainViewModel.cs"
In my home page, I have a list of theaters and I can navigate to a details page.
But when I want to navigate from the tile, I have an error...
The Tile :
ShellTile.Create(new Uri("/TheaterDetails.xaml?selectedItem=" + theater.idTheater, UriKind.Relative), tile, false);
My TheaterDetails page :
public partial class TheaterDetails : PhoneApplicationPage
{
theater theater = new theater();
public TheaterDetails()
{
InitializeComponent();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (!App.ViewModel.IsDataLoaded)
{
App.ViewModel.LoadData();
}
if (DataContext == null)
{
string selectedIndex = "";
if (NavigationContext.QueryString.TryGetValue("selectedItem", out selectedIndex))
{
int index = int.Parse(selectedIndex);
theater = (from t in App.ViewModel.Theaters
where t.idTheater == index
select t).SingleOrDefault();
DataContext = theater;
....
....
....
The error :
https://dl.dropboxusercontent.com/u/9197067/error.png
Like if the data were not loaded...
Do you have an idea where the problem come from ?
The solution could be easy but I am a beginner... Maybe it's because I load the data asynchronously and the application doesn't wait until it's done...
Thanks
EDIT :
My LoadData() method :
public void LoadData()
{
client.GetTheatersCompleted += new EventHandler<ServiceReference1.GetTheatersCompletedEventArgs>(client_GetTheatersCompleted);
client.GetTheatersAsync();
// Other get methods...
this.IsDataLoaded = true;
}
private void client_GetTheatersCompleted(object sender, ServiceReference1.GetTheatersCompletedEventArgs e)
{
Theaters = e.Result;
}
You should check to see which variable is actually null. In this case it looks to be Theaters (otherwise the error would have thrown earlier).
Since Theaters is populated from a web call it is most likely being called asynchronously, in other words when you return from LoadData() the data is not yet there (it's still waiting for the web call to come back), and is waiting for the web service to return its values.
Possible solutions:
Make LoadData() an async function and then use await LoadData(). This might require a bit of rewriting / refactoring to fit into the async pattern (general introduction to async here, and specific to web calls on Windows Phone here)
A neat way of doing this that doesn't involve hacks (like looping until the data is there) is to raise a custom event when the data is actually populated and then do your Tile navigation processing in that event. There's a basic example here.
So the solution that I found, thanks to Servy in this post : Using async/await with void method
I managed to use async/await to load the data.
I replaced my LoadData() method by :
public static Task<ObservableCollection<theater>> WhenGetTheaters(ServiceClient client)
{
var tcs = new TaskCompletionSource<ObservableCollection<theater>>();
EventHandler<ServiceReference1.GetTheatersCompletedEventArgs> handler = null;
handler = (obj, args) =>
{
tcs.SetResult(args.Result);
client.GetTheatersCompleted -= handler;
};
client.GetTheatersCompleted += handler;
client.GetTheatersAsync();
return tcs.Task;
}
public async Task LoadData()
{
var theatersTask = WhenGetTheaters(client);
Theaters = await theatersTask;
IsDataLoaded = true;
}
And in my page :
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
if (!App.ViewModel.IsDataLoaded)
{
await App.ViewModel.LoadData();
}
I want to use google map v2 to load the map using either gps or internet, I can do it using just internet.
when I connect my application to internet, the map is loaded successfully, but if i used just gps the map doesn't show even though I have already activiate the gps in my phone and in my app.
this is my code, first i get my location then i load the mapp
setContentView(R.layout.google_map_layout);
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (!enabled) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
} else {
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
Toast.makeText(RestaurantsNearBy.this,
location.getLatitude() + "", Toast.LENGTH_LONG).show();
LatLng currentLocation = new LatLng(location.getLatitude(),
location.getLongitude());
new getRestaurantNearBy().execute(currentLocation.latitude,
currentLocation.longitude);
map = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
map.setInfoWindowAdapter(new InfoWindowAdapter() {
private final View window = getLayoutInflater().inflate(
R.layout.restaurant_marker, null);
#Override
public View getInfoWindow(Marker marker) {
return null;
}
#Override
public View getInfoContents(Marker marker) {
TextView tv_title = ((TextView) window
.findViewById(R.id.tv_title));
TextView tv_description = ((TextView) window
.findViewById(R.id.tv_description));
ImageView iv_image = ((ImageView) window
.findViewById(R.id.iv_image));
AddressMap oneAddres = markersMap.get(marker);
tv_title.setText(oneAddres.getRestaurant().getName());
tv_description.setText(oneAddres.getDescription());
Restaurant r = markersMap.get(marker).getRestaurant();
if (Restaurant.getRestaurant(r.getID()) != null) {
if (Restaurant.getRestaurant(r.getID()).getImage() != null) {
iv_image.setImageBitmap(Restaurant
.getRestaurant(r.getID()).getImage());
} else {
try {
iv_image.setImageBitmap(r
.getImageFromWebService());
} catch (Exception e) {
iv_image.setImageResource(R.drawable.unknown);
}
}
} else {
iv_image.setImageBitmap(r.getImageFromWebService());
}
return window;
}
});
map.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {
#Override
public void onInfoWindowClick(Marker marker) {
final AddressMap oneAddress = markersMap.get(marker);
AlertDialog alertDialog3 = new AlertDialog.Builder(
RestaurantsNearBy.this).create();
alertDialog3.setTitle("Order !");
alertDialog3
.setMessage("Do you want to order from the restaurant "
+ oneAddress.getRestaurant().getName());
alertDialog3.setIcon(R.drawable.more_information);
alertDialog3.setButton("Yes",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog,
int which) {
Basket.setRestaurant(oneAddress
.getRestaurant());
dialog.dismiss();
Intent addAddressIntent = new Intent(
RestaurantsNearBy.this,
OrderMeal.class);
startActivity(addAddressIntent);
}
});
alertDialog3.setButton2("No",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog,
int which) {
dialog.dismiss();
}
});
alertDialog3.show();
}
});
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(
currentLocation, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
Log.d("Provider ", provider + " has been selected.");
onLocationChanged(location);
} else {
Toast.makeText(RestaurantsNearBy.this, "Sorry we couldn't define your location",
Toast.LENGTH_SHORT).show();
}
}
You should use proper tags, Google Maps can be found on loads of platforms, and you have a question about the android versions, so at least add Android tag.
On the question: Google Maps NEEDS active internet connection, when you first load the maps. V2 does some decent caching on your SD card (sometimes a bit excessive too), allowing you to later check thoose already loaded maps offline, but the principle is: no active internet connection, no Google Maps.
ps: GPS is NOT an internet connection.
By default you can't load the map data properly if you aren't connected with wifi or mobile connection. GPS only lets you find your position.
I followed this tutorial: http://android-er.blogspot.com/2013/03/embed-google-map-in-webview.html
I'm trying to just use the Google Map in the WebView, but it can't get my current location. I've enabled JavaScript on the WebView. What else do I have to enable?
Does anyone know why that might be? Shouldn't it prompt me to use my current location?
Note that I am not interested in using a MapView as an alternative whatsoever. I'm trying to find out what I need to set on the WebView or maybe on the device's location services?
You should permit the web view to access your location by overriding the method onGeolocationPermissionsShowPrompt like this:
webView.setWebChromeClient(new WebChromeClient(){
#Override
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
callback.invoke(origin, true, false);
}
});
On API 5.x and below, you will need
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
in your AndroidManifest.xml.
But to allow permissions for geolocation on API 6.0+, you have to request the permission at runtime.
To do this, use
private String mGeolocationOrigin;
private GeolocationPermissions.Callback mGeolocationCallback;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// other setup
myWebView.setWebChromeClient(new MyWebChromeClient());
}
private WebChromeClient mWebChromeClient = new WebChromeClient() {
#Override
public void onGeolocationPermissionsShowPrompt(String origin,
GeolocationPermissions.Callback callback) {
// Geolocation permissions coming from this app's Manifest will only be valid for devices with API_VERSION < 23.
// On API 23 and above, we must check for permission, and possibly ask for it.
final String permission = Manifest.permission.ACCESS_FINE_LOCATION;
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M ||
ContextCompat.checkSelfPermission(MainActivity.this, permission) == PackageManager.PERMISSION_GRANTED) {
// we're on SDK < 23 OR user has already granted permission
callback.invoke(origin, true, false);
} else {
if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, permission)) {
// user has denied this permission before and selected [/] DON'T ASK ME AGAIN
// TODO Best Practice: show an AlertDialog explaining why the user could allow this permission, then ask again
} else {
// ask the user for permissions
ActivityCompat.requestPermissions(MainActivity.this, new String[] {permission}, RP_ACCESS_LOCATION);
mGeolocationOrigin = origin;
mGeolocationCallback = callback;
}
}
}
}
and receive the result:
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case RP_ACCESS_LOCATION:
boolean allow = false;
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// user has allowed these permissions
allow = true;
}
if (mGeolocationCallback != null) {
mGeolocationCallback.invoke(mGeolocationOrigin, allow, false);
}
break;
}
}
in your activity.
You can try GreenDroid with Google Maps.
Checkt it out: https://github.com/cyrilmottier/GreenDroid
You'd have to enable android.permission.ACCESS_FINE_LOCATION and android.permission.INTERNET,
Create a LocationManager instance and LocationListener instance
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 10, locationListener);
and add onLocationChanged(Location loc) method that inside of it have your loc generate the longitude and latitude (String long = loc.getLongitude(); String lat = loc.getLatitude();)
and now use long, lat to generate your mapPath string and continue to generate the WebView
You can use this for ref: http://www.rdcworld-android.blogspot.in/2012/01/get-current-location-coordinates-city.html
so I've been looking for this for a week now and reading though every problem similar but none seemed to ask the same problem as mine exactly(try reverse engineering other solution similar to what I want with no success.
explained caveman style: I'm trying to create list using Metadata.
I open with a multi dialog and select more than one mp3
I put the file in an ArrayList<File>
I loop though the files with an enhanced for loop and extract metadata using a media variable
The info for the metadata ( like "artist") is what i want to save in an ArrayList for example
the problem is that the listener only works way after the enhanced loop has finished which results in
ArrayList<String> having one object with nothing in it
here is a sample:
ArrayList<String> al;
String path;
public void open(){
files=chooser.showOpenMultipleDialog(new Stage());
for( File f:files){
path=f.getPath();
Media media = new Media("file:/"+path.replace("\\", "/").replace(" ", "%20"));
al= new ArrayList<String>();
media.getMetadata().addListener(new MapChangeListener<String, Object>() {
public void onChanged(Change<? extends String, ? extends Object> change) {
if (change.wasAdded()) {
if (change.getKey().equals("artist")) {
al.add((String) change.getValueAdded());
}
}
}
});
}//close for loop
//then i want to see the size of al like this
system.out.println(al.size());
//then it returns 1 no matter how much file i selected
//when i system out "al" i get an empty string
the other way to read a media source metadata with adding a listener is extract that information in the mediaplayer .setOnReady(); here is an example part of the java controller class
public class uiController implements Initializable {
#FXML private Label label;
#FXML private ListView<String> lv;
#FXML private AnchorPane root;
#FXML private Button button;
private ObservableList<String> ol= FXCollections.observableArrayList();
private List<File> selectedFiles;
private final Object obj= new Object();
#Override
public void initialize(URL url, ResourceBundle rb) {
assert button != null : "fx:id=\"button\" was not injected: check your FXML file 'ui.fxml'.";
assert label != null : "fx:id=\"label\" was not injected: check your FXML file 'ui.fxml'.";
assert lv != null : "fx:id=\"lv\" was not injected: check your FXML file 'ui.fxml'.";
assert root != null : "fx:id=\"root\" was not injected: check your FXML file 'ui.fxml'.";
// initialize your logic here: all #FXML variables will have been injected
lv.setItems(ol);
}
#FXML private void open(ActionEvent event) {
FileChooser.ExtensionFilter extention= new FileChooser.ExtensionFilter("Music Files", "*.mp3","*.m4a","*.aif","*.wav","*.m3u","*.m3u8");
FileChooser fc= new FileChooser();
fc.setInitialDirectory(new File(System.getenv("userprofile")));
fc.setTitle("Select File(s)");
fc.getExtensionFilters().add(extention);
selectedFiles =fc.showOpenMultipleDialog(root.getScene().getWindow());
if(selectedFiles != null &&!selectedFiles.isEmpty()){
listFiles();
}
}
/**
* Convert each fie selected to its URI
*/
private void listFiles(){
try {
for (File file : selectedFiles) {
readMetaData(file.toURI().toString());
synchronized(obj){
obj.wait(100);
}
}
} catch (InterruptedException ex) {
}
System.gc();
}
/**
* Read a Media source metadata
* Note: Sometimes the was unable to extract the metadata especially when
* i have selected large number of files reasons i don't known why
* #param mediaURI Media file URI
*/
private void readMetaData(String mediaURI){
final MediaPlayer mp= new MediaPlayer(new Media(mediaURI));
mp.setOnReady(new Runnable() {
#Override
public void run() {
String artistName=(String) mp.getMedia().getMetadata().get("artist");
ol.add(artistName);
synchronized(obj){//this is required since mp.setOnReady creates a new thread and our loopp in the main thread
obj.notify();// the loop has to wait unitl we are able to get the media metadata thats why use .wait() and .notify() to synce the two threads(main thread and MediaPlayer thread)
}
}
});
}
}
the few changes that have made is used an ObservableList to store the artist name from the metadata
in the code you will find this
synchronized(obj){
obj.wait(100);
}
I do this because the mediaplayer .setOnReady() creates a new thread and the loop is in the main application thread, The loop has to wait for some time before the other thread is created and we are able to extract the metadata, and in the .setOnReady() there is a
synchronized(obj){
obj.notify;
}
to wake up the main thread hence the loop is able to move to the next item
I admit that this may not be the best solution to do this but am welcomed to anyone who has any better way on how to read JavaFx media metadata from a list of files
The full Netbeans project can be found here https://docs.google.com/file/d/0BxDEmOcXqnCLSTFHbTVFcGIzT1E/edit?usp=sharing
plus have created a small MediaPlayer Application using JavaFX which expolits use of the metadata https://docs.google.com/file/d/0BxDEmOcXqnCLR1Z0VGN4ZlJkbUU/edit?usp=sharing
You can use the following function to retrieve the metadata for a given Media object:
public static void initializeMetaData(Media media) {
final Ref<Boolean> ready = new Ref<>(false);
MediaPlayer mediaPlayer = new MediaPlayer(media);
mediaPlayer.setOnReady(() -> {
synchronized (ready) {
ready.set(false);
ready.notify();
}
});
synchronized (ready) {
if (!ready.get()) {
try {
ready.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
However, do not call initializeMetaData from a JavaFX thread, otherwise the thread runs into a deadlock.
PS: It's really ridiculous that one has to build such a workaround. I hope that in future Media will provide an initialize() method which does this job.
My solution to that issue was this:
public class MediaListener implements MapChangeListener<String, Object>
{
public String title = null;
public String artist = null;
public String album = null;
private final Consumer<MediaListener> handler;
private boolean handled = false;
public MediaListener(Consumer<MediaListener> handler)
{
this.handler = handler;
}
#Override
public void onChanged(MapChangeListener.Change<? extends String, ?> ch)
{
if (ch.wasAdded())
{
String key = ch.getKey();
switch (key)
{
case "title":
title = (String) ch.getValueAdded();
break;
case "artist":
artist = (String) ch.getValueAdded();
break;
case "album":
album = (String) ch.getValueAdded();
break;
}
if (!handled && title != null && artist != null && album != null)
{
handler.accept(this);
handled = true;
}
}
}
}
It may not be the best way but it's way cleaner than creating a new MediaPlayer per file.
Example usage:
Media media = Util.createMedia(path);
media.getMetadata().addListener(new MediaListener((data) ->
{
// Use the data object to access the media
}));