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I am trying to write a simple application that gets updated. For this I need a simple function that can download a file and show the current progress in a
ProgressDialog
. I know how to do the ProgressDialog
, but I'm not sure how to display the current progress and how to download the file in the first place.Nov 17, 2014 Download java apk 1.0 for Android. Directory of java. By adding tag words that describe for Games&Apps, you're helping to make these Games. Apr 28, 2014 You can use Java in your Android. You can run java files, class files, and jar files. Also you can compile, decompile your own java programs with this application. 이제 Java를 여러분의 디바이스에서 사용할 수 있습니다. 여러분은 java 파일, class 파일, jar 파일을 실행할 수 있습니다. 또한 java 파일을 class 파일로 컴파일 할 수 있으며, class. This Game i Played in 2010 on my sister Phone Nokia 2700 Classic then again played on J2me Loader on My Android in 2019 September, because j2me loader can't support snake iii, now j2me loader. Java software for your computer, or the Java Runtime Environment, is also referred to as the Java Runtime, Runtime Environment, Runtime, JRE, Java Virtual Machine, Virtual Machine, Java VM, JVM, VM, Java plug-in, Java plugin, Java add-on or Java download. Find out what to look for in the latest version of Android Studio, including support for Kotlin, Java 8, and a wealth of new tools and plugins. If you're new to Android Studio, this tutorial series will get you started. I'll briefly introduce the Android development platform, then show you how to. Download the official Android IDE and developer tools to build apps for Android phones, tablets, wearables, TVs, and more. Java, and C/C languages.
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Tom LeeseTom Leese9,7371010 gold badges3939 silver badges6161 bronze badges
12 Answers
There are many ways to download files. Following I will post most common ways; it is up to you to decide which method is better for your app.
This method will allow you to execute some background processes and update the UI at the same time (in this case, we'll update a progress bar).
This is an example code:
The
AsyncTask
will look like this:The method above (
doInBackground
) runs always on a background thread. You shouldn't do any UI tasks there. On the other hand, the onProgressUpdate
and onPreExecute
run on the UI thread, so there you can change the progress bar:For this to run, you need the WAKE_LOCK permission.
The big question here is: how do I update my activity from a service?. In the next example we are going to use two classes you may not be aware of:
ResultReceiver
and IntentService
. ResultReceiver
is the one that will allow us to update our thread from a service; IntentService
is a subclass of Service
which spawns a thread to do background work from there (you should know that a Service
runs actually in the same thread of your app; when you extends Service
, you must manually spawn new threads to run CPU blocking operations).Download service can look like this:
Add the service to your manifest:
And the activity will look like this:
Here is were
ResultReceiver
comes to play:2.1 Use Groundy library
Groundy is a library that basically helps you run pieces of code in a background service, and it is based on the
ResultReceiver
concept shown above. This library is deprecated at the moment. This is how the whole code would look like:The activity where you are showing the dialog...
A
GroundyTask
implementation used by Groundy to download the file and show the progress:And just add this to the manifest:
It couldn't be easier I think. Just grab the latest jar from Github and you are ready to go. Keep in mind that Groundy's main purpose is to make calls to external REST apis in a background service and post results to the UI with easily. If you are doing something like that in your app, it could be really useful.
2.2 Use https://github.com/koush/ion
GingerBread brought a new feature,
DownloadManager
, which allows you to download files easily and delegate the hard work of handling threads, streams, etc. to the system.First, let's see a utility method:
Method's name explains it all. Once you are sure
DownloadManager
is available, you can do something like this:Download progress will be showing in the notification bar.
First and second methods are just the tip of the iceberg. There are lots of things you have to keep in mind if you want your app to be robust. Here is a brief list:
- You must check whether user has an internet connection available
- Make sure you have the right permissions (
INTERNET
andWRITE_EXTERNAL_STORAGE
); alsoACCESS_NETWORK_STATE
if you want to check internet availability. - Make sure the directory were you are going to download files exist and has write permissions.
- If download is too big you may want to implement a way to resume the download if previous attempts failed.
- Users will be grateful if you allow them to interrupt the download.
Unless you need detailed control of the download process, then consider using
DownloadManager
(3) because it already handles most of the items listed above.But also consider that your needs may change. For example,
DownloadManager
does no response caching. It will blindly download the same big file multiple times. There's no easy way to fix it after the fact. Where if you start with a basic HttpURLConnection
(1, 2), then all you need is to add an HttpResponseCache
. So the initial effort of learning the basic, standard tools can be a good investment.This class was deprecated in API level 26. ProgressDialog is a modal dialog, which prevents the user from interacting with the app. Instead of using this class, you should use a progress indicator like ProgressBar, which can be embedded in your app's UI. Alternatively, you can use a notification to inform the user of the task's progress. For more details Link
Don't forget to add permissions to your manifest file if you're gonna be downloading stuff from the internet!
Ziem4,17077 gold badges4343 silver badges7676 bronze badges
MnightmareMnightmare1,27911 gold badge99 silver badges55 bronze badges
Yes the code above will work .But if you are updating your
progressbar
in onProgressUpdate
of Asynctask
and you press back button or finish your activity AsyncTask
looses its track with your UI .And when you go back to your activity, even if download is running in background you will see no update on progressbar. So on OnResume()
try to run a thread like runOnUIThread
with a timer task that updates ur progressbar
with values updating from the AsyncTask
running background.Don't forget to Destroy the thread when ur activity is not visible.
Charuක10.9k55 gold badges3636 silver badges7676 bronze badges
sheetalsheetal2,50511 gold badge2424 silver badges3939 bronze badges
I'd recommend you to use my Project Netroid, It's based on Volley. I have added some features to it such as multi-events callback, file download management. This could be of some help.
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VinceStylingVinceStyling3,09522 gold badges2222 silver badges4040 bronze badges
I have modified
CharuකAsyncTask
class to handle creation of progressDialog
at the same context .I think following code will be more reusable.(it can be called from any activity just pass context,target File,dialog message)10.9k55 gold badges3636 silver badges7676 bronze badges
The SyrianThe Syrian
Do not forget to replace '/sdcard...' by new File('/mnt/sdcard/...') otherwise you will get a FileNotFoundException
ENSATEENSATE
I found this blog post very helpful, Its using loopJ to download file, it has only one Simple function, will be helpful to some new android guys.
Java Application For Android Download
chintan adatiyachintan adatiya
While I was starting to learn android development, I had learnt that
ProgressDialog
is the way to go. There is the setProgress
method of ProgressDialog
which can be invoked to update the progress level as the file gets downloaded.The best I have seen in many apps is that they customize this progress dialog's attributes to give a better look and feel to the progress dialog than the stock version. Good to keeping the user engaged with some animation of like frog, elephant or cute cats/puppies. Any animation with in the progress dialog attracts users and they don't feel like being kept waiting for long.
Bhargav Rao♦32.8k2121 gold badges9696 silver badges115115 bronze badges
SandeepSandeep2,46355 gold badges3333 silver badges7676 bronze badges
My personal advice is to use Progress Dialog and build up before execution , or initiate at
Sam RadOnPreExecute()
, publish progress often if you use horizontal style of progress bar of the progress dialog. The remaining part is to optimize the algorithm of doInBackground
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Raju yourPepeRaju yourPepe
Java Apps For Phones
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Use Android Query library, very cool indeed.You can change it to use
ProgressDialog
as you see in other examples, this one will show progress view from your layout and hide it after completion.Java For Android Download Apk
CharuකJava Games For Android Download
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RenetikRenetik
vishnuc156vishnuc156
I am adding another answer for other solution I am using now because Android Query is so big and unmaintained to stay healthy. So i moved to this https://github.com/amitshekhariitbhu/Fast-Android-Networking.
RenetikRenetik
protected by Hans OlssonDec 7 '11 at 11:13
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