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. GingerBread brought a new feature, DownloadManager , which allows you to download files easily and delegate the hard work of handling threads, streams, etc.
Method's name explains it all. Once you are sure DownloadManager is available, you can do something like this:. 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:. 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. So the initial effort of learning the basic, standard tools can be a good investment.
This class was deprecated in API level 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! 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.
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.
I have modified AsyncTask class to handle creation of progressDialog at the same context. I think following code will be more reusable. 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.
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. Any animation with in the progress dialog attracts users and they don't feel like being kept waiting for long.
My personal advice is to use Progress Dialog and build up before execution , or initiate at OnPreExecute , 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. 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. I am adding another answer for other solution I am using now because Android Query is so big and unmaintained to stay healthy. You can observer the progress of the download manager using LiveData and coroutines, see the gist below.
How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Stop Googling Git commands and actually learn it! The function returns the number of bytes copied.
If the value of the variable i is -1, then it indicates that the contents of the file are over 2GB. When the returned value is -1, you can use the function copyLarge inputStream, fileOS in place of the copy inputstream, fileOS function to handle this load. Both of these functions buffer the inputstream internally. The internal buffer means we do not have to use the BufferedInputStream class to enhance our code performance and helps us avoid writing boilerplate code. Another library managed by the Apache organization is the HttpComponents package.
This library uses the request-response mechanism to download the file from a given URL. The first step to downloading a file is to create an HTTP client object that would issue the request to the server. For this, we will be using the CloseableHttpClient class. The code snippet that creates a new HTTP client is as follows:.
We then need to create an HttpGet or HttpPost object to send the request to the server. The request is created by the following line of code:. The execute request function is applied to the client object and returns with a response from the server. Once the request is sent to the server we need a response object to receive the data sent from the server.
To catch the response from the server we use the HttpResponse class object. The data sent by the server in the form of a message is obtained through the getEntity function. Active 10 months ago. Viewed 8k times. Furqan Hussain Furqan Hussain 3 3 silver badges 14 14 bronze badges. Is there any necessary tagging "javascript"? Add a comment. Active Oldest Votes. Quick learner Quick learner 8, 2 2 gold badges 32 32 silver badges 47 47 bronze badges.
The question specially asks how to download to the internal storage. What is the file is executable, not image, how can I decode it. Where is the url of the fire to be downloaded — Hasan A Yousef. After some searching on google i think its a permission problem because these files are private to the application. So how do I make these files public? How are we doing? Please help us improve Stack Overflow.
Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Collectives on Stack Overflow. Learn more. Android open downloaded file Ask Question. Asked 7 years, 10 months ago. Active 4 years, 6 months ago.
0コメント