In my application I'm downloading movies from the server. Some of them are very big (4gb or more). I tried to implement my own download manager as a service and it was not quit good. On some devices the app just crashes into itself without any notice, and overall the download seems to be too slowly.
So, I wanted to use Android's default DownloadManager, but my only problem is that I can't pause/resume it.
Is there a way to implement that?
From what I can tell by looking at the source code, this isn't supported (although the DownloadManager will automatically retry after failures on its own and after system reboots, etc.).
If you haven't seen this or this already, it looks like there is some useful information there on how to implement your own service yourself with these capabilities.
I found another very impressive library
https://github.com/Trinea/android-common
You can pause by set the Downloads.Impl.COLUMN_CONTROL to Downloads.Impl.CONTROL_PAUSED.
And resume by set the Downloads.Impl.COLUMN_CONTROL, Downloads.Impl.CONTROL_RUN
public void pauseOrResumeDownload(boolean pause, long... ids) {
ContentValues values = new ContentValues();
if (pause) {
values.put(Downloads.Impl.COLUMN_CONTROL, Downloads.Impl.CONTROL_PAUSED);
} else {
values.put(Downloads.Impl.COLUMN_STATUS, Downloads.Impl.STATUS_PENDING);
values.put(Downloads.Impl.COLUMN_CONTROL, Downloads.Impl.CONTROL_RUN);
}
mResolver.update(mBaseUri, values, getWhereClauseForIds(ids), getWhereArgsForIds(ids));
}
Related
for awhile now, I am working on a media playing app. In this app, I also programmed a little 5 Band EQ using mainly this code:
try
{
AppPreferencesClass ap = new AppPreferencesClass(ctx);
if (Activity_Player.eq != null)
{
Activity_Player.eq.Dispose();
}
Activity_Player.eq = new Android.Media.Audiofx.Equalizer(0, Activity_Player.mediaPlayerSessionId);
Activity_Player.eq.SetEnabled(true);
await Task.Run(() =>
{
if (Activity_Player.EqActive)
{
if (ap.getAwesomeSound())
{
Activity_Player.eq.SetBandLevel(0, Convert.ToInt16(Activity_Equalizer.awesomesound0));
Activity_Player.eq.SetBandLevel(1, Convert.ToInt16(Activity_Equalizer.awesomesound1));
Activity_Player.eq.SetBandLevel(2, Convert.ToInt16(Activity_Equalizer.awesomesound2));
Activity_Player.eq.SetBandLevel(3, Convert.ToInt16(Activity_Equalizer.awesomesound3));
Activity_Player.eq.SetBandLevel(4, Convert.ToInt16(Activity_Equalizer.awesomesound4));
}
else
{
Activity_Player.eq.SetBandLevel(0, Convert.ToInt16(ap.getEQ0()));
Activity_Player.eq.SetBandLevel(1, Convert.ToInt16(ap.getEQ1()));
Activity_Player.eq.SetBandLevel(2, Convert.ToInt16(ap.getEQ2()));
Activity_Player.eq.SetBandLevel(3, Convert.ToInt16(ap.getEQ3()));
Activity_Player.eq.SetBandLevel(4, Convert.ToInt16(ap.getEQ4()));
}
}
});
}
catch
{
}
For many days, this worked just fine but out of NO WHERE, the catch block sometimes gets activated. But only occasionally.On other times, try works fine but there are just no more changes to the audio being played. This is odd enough, since I never changed anything on this code after it starting working.
I then tried another phone (Samsung S4) on my code and the eq worked just perfectly.
So this got me googleing and I think I might have heard that there can only be as many audiosession IDs after you just would run out. I tested and the audio session ID used here is somewhere at 74,000.
So this could be an issue I thought but this would easialy be tested because I already had this very app running in the google play store just an older version of it. I am 100 percent positive, that in this version the EQ worked on my phone. Otherwise I would have not uploaded that version.
Anyway, I downloaded my old app from the play store and here we go:
It doesnt work anymore. The EQ in the old version also has simply NO effect on the audio. While ofcourse on my other phones this old version works perfectly.
Before I am going to reset my own personal phone I wanted to ask you guys if this could be infact the case.
Another thing is, that I am using many static variables in order to get the EQ to work right. Actually, the variable EQ itself is static. Do maybe static variables sort of leave a "trace" behind and maybe I have set the eq up just "too" many times? Although I am disposing of the object before intialising it again (see in my code).
Summing up:
1.) Can there maybe be a maxmium number of EQ or AudioSessionIDs and I have passed those?
2.) Can creating static variables over and over again in my code cause a memory leak so big, even deinstalling the app doesnt do anything?
Thank you!
This is the error log:
11-20 12:16:43.736 E/AudioEffect(16990): set(): AudioFlinger could not create effect, status: -38
11-20 12:16:43.736 E/AudioEffects-JNI(16990): Error setting AudioEffect
11-20 12:16:43.737 E/AudioEffect-JAVA(16990): Error code -19 when initializing AudioEffect.
Thread started: #311-20 12:16:43.745 V/MediaPlayerNative(16990): unrecognized message: (6, 0, 0)
After 2 days of googeling and trying evetything out, here is the issue:
NOT CALLING RELEASE() will have you eventually have to REBOOT your phone. It wont allow too many instances of an EQ to be set.
Solution:
if (eq != null)
{
eq.Release();
}
After reading the documentation on Spotify's Android Media Notifications API, https://beta.developer.spotify.com/documentation/android-sdk/guides/android-media-notifications/, I successfully managed to receive the notifications metadata and it is displayed properly on my app.
However, the notifications metadata is only updated when the queue changes, when the track changes, and when playback is changed, so unless one of these three actions happens, the "positionInMs" intent extra isn't sent.
As of right now as a workaround I am simply starting a timer using the time the intent was sent, the last known playback position, and the track duration to track current playback position.
This seemed to work at first, but after further testing I've realized that the timer I set can go out of sync, if the track the user is listening to freezes because of a slow internet connection.
Any ideas to properly track the playback position, while accounting for a slow internet connection? Or are there any alternatives I should look into?
I understand that this question is rather old, but I am going to answer anyway if anyone else comes across it.
I recommend constantly querying Spotify to get the playback position. One way you can do this is by using a timer and querying Spotify every given time frame. The below example queries Spotify every 100ms. If you want to reduce/increase the numbers of queries, you can simply use stopwatch.setClockDelay() and provide your required time
For instance, you can use this timer library
implementation 'com.yashovardhan99.timeit:timeit:1.2.0'
Then use the following code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.spotify);
Stopwatch stopwatch = new Stopwatch();
stopwatch.setOnTickListener(this);
stopwatch.start();
}
#Override
public void onTick(Stopwatch stopwatch) {
Data.getAndroidSpotifyAppRemote().getPlayerApi().getPlayerState().setResultCallback(new CallResult.ResultCallback<PlayerState>() {
#Override
public void onResult(PlayerState playerState) {
Log.d("TAG", playerState.playbackPosition);
}
});
}
Don't forget to add the following code at the top of your class:
implements Stopwatch.OnTickListener
I have being upgrading an application to use the new Mobile Android GNSK but I have noticed that using the new MusicID-Stream is a little bit tricky. If the "identifyAlbumAsync" method get executed before the "audioProcessStart" method(since this need to be executed in a different thread), the application just crashes. In the Gracenote Demo application, the "audioProcessStart" method is continuously running so there is no need to synchronize its execution with the "identifyAlbumAsync" method call. Is it the way it is supposed to be used? It will be convenient if the application didn't crashed at least when the methods are not executed in order. Also in our application, we don't want to have the "audioProcessStart" method continuously like it is done in the demo application. We only want to run the "audioProcessStart" method when the user request identification and when the song playing gets identified , we want to stop the audio processing by calling "audioProcessStop". Is there an easy way to do this? Right now, we are getting the Thread where "identifyAlbumAsync" is running to sleep for 2 seconds in order to make sure that the Thread where the "audioProcessStart" method is supposed to run has time to get executed. Thank you in advance for your prompt response
In the upcoming 1.2 release, IGnMusicIdStreamEvents includes a callback that signals audio-processing has started, and an ID can be synced with this, e.g.:
#Override
public void musicIdStreamProcessingStatusEvent( GnMusicIdStreamProcessingStatus status, IGnCancellable canceller ) {
if (GnMusicIdStreamProcessingStatus.kStatusProcessingAudioStarted.compareTo(status) == 0) {
try {
gnMusicIdStream.identifyAlbumAsync();
} catch (GnException e) { }
}
}
Thanks for the feedback, you're right about this issue. Unfortunately right now sleeping is the best solution. But we are adding support for an explicit sync event in an upcoming release, please stay tuned.
I want to check if my app is running on a background mode.
The problem is that i have many activities(list activities, map activities etc.). Initially I have tried in the life cycle's resume and pause(or the onUserLeaveHint) methods to set a static boolean as true or false and work with this way. But this obviously can't work because when I move from one activity to another, the previous one get paused.
Also, I've read here on stackoverflow that the getRunningTasks() should be used only for debugging purposes. I did a huge research but I can't find a solution. All I want to do is to be able to detect if a the app is running on a background. Can anyone propose me a way, or express any thought on how can I do that?
You can try the same mechanism (a boolean attribute) but on application side rather than activity side. Create a class which extends Application, declare it in the manifest file under <application android:name=YourClassApp>.
EDIT: I assume you know that activities aren't intended for background processing, if not you should take a look at the Services.
I don't know if this will help but you can use
getApplicaton().registerActivityLifecycleCallbacks(yourClass);
To get a birds eye view of how your activities are displayed in the FG. (For older s/w you can use this)
If your Application has a Service you could have a static get/set which accesses a static variable. Do not do this in Activities though, it causes mem leaks.
But realistically speaking there is no tidy way of tracking if your application is running or not.
I had the same problemen when overwriting the Firebase push messaging default behavior (show notifications only when in the background) I checked how Firebase did this by looking in the .class file com.google.firebase.messaging.zzb:53 (firebase-messaging:19.0.1) which appears to us getRunningAppProcesses. Mind you FireBase is created by Google them self. So I'm assuming it's pretty save to use. Cleaned up version:
List<ActivityManager.RunningAppProcessInfo> runningApps;
boolean isInForeground =false;
if ((runningApps = ((ActivityManager)this.getApplication().getSystemService(Context.ACTIVITY_SERVICE)).getRunningAppProcesses()) != null) {
Iterator runningApp = runningApps.iterator();
int myPid = Process.myPid();
while(runningApp.hasNext()) {
ActivityManager.RunningAppProcessInfo processInfo;
if ((processInfo = (ActivityManager.RunningAppProcessInfo)runningApp.next()).pid == myPid) {
isInForeground = processInfo.importance == 100;
break;
}
}
}
I want to develop an application (or service) that will count the number of times I open http://www.google.com url. But I do not know if this is possible with Android.
I want to do a research on this field but I do not know how to start. As far I was looking, there is no intent fired when some uri in the browser is oppened, but I guess there is so way to do this. I do not expect to be simple but I hope it is possible. My hope is the fact that some applications measure the network traffic, meaning everything is somehow tracked.
This isn't guaranteed to work across all flavours of Android, but according to the documentation you can read the browser database.
Browser is a static helper that provides access to the bookmarks database and, handily for your requirements, also exposes browser history via a method called getAllVisitedUrls.
Cursor cursor=Browser.getAllVisitedUrls(getContentResolver());
cursor.moveToFirst();
int occasions=0;
while (cursor.moveToNext()) {
String urlVisited=cursor.getString(cursor.getColumnIndex(BookmarkColumns.URL));
if (urlVisited.contains("www.google.")) {
occasions++;
}
Log.d("History",cursor.getString(cursor.getColumnIndex(BookmarkColumns.URL)));
}
Log.d("History","occasions="+occasions);
EDIT: Sorry to update this after it's been accepted as an answer, but contrary to what I initially wrote you can indeed register to listen for changes to the bookmarks URI:
getContentResolver().registerContentObserver(Browser.BOOKMARKS_URI, true,
new ContentObserver(new Handler()) {
#Override
public void onChange(boolean selfChange) {
Log.d("History","Bookmarks has changed");
super.onChange(selfChange);
}
});
I hope that's helpful.
EDIT: I neglected to mention that you need to add a permission to your manifest: com.android.browser.permission.READ_HISTORY_BOOKMARKS