Reading previous posts, I can check all the content provider there are on my system.
I was wondering what is the correct way of making Uri's for the content resolver? Do we just put the whole path like Uri.parse("content://org.company.example.sampleprovider/items"); or should we go step by step like
Uri.builder.scheme("content://");
Uri.builder.authority("org.company.example.sampleprovider");
What is the correct next step to get the items? How is the Uri.matcher used? in this whole procedure?
Related
I need to track and update download status(start,pause,play,done) of multiple files in a list that I get from some Api (can't share), onto a RecyclerView.
I am also getting a fileId so each file can be distinguished.
I need download tracking based on the fileId because the Download list is also searchable, it means that the position of items will change and so we can't rely on position based ViewHolder refreshing.
Also if for some reason you close the app, and then go back to the list, search the file, it should show the file download status.
Now there are three options :
a) WorkManager based implementation (how this option can be implemented?)
b) PRDownloader (how this option can be implemented?)
c) Or Android's download manager? (Need to be sure that we need to show progress of multiple files at
same time in a list.)
Which one is better and more reliable?
Which one is the shortest method?
Also can someone share if you have code based on work manager?(how
will you manage to relate fileId to workManger's work id. Do I
need to make a DB table for keeping track of downloads by the Worker?
How to use LiveData from workManager, iff we can in the ViewHolder )
[Reference to Blog/Code/Repos will be most helpful]
Answering my own question(strange!).
I used Fetch Downloader Library
Initialized and used the "Fetch Instance" as a Singleton
Added the download using tag (Maybe I wrongly used the tag. It was supposed to be used for group of downloads. But I used one tag for each download. But it worked.)
Now I did following in the ViewHolder's bind() method :
Took the file Id as a "tag" and removed the FetchObserver linked to
the "tag" i.e. Id using the method of "Fetch Instance" (//will update
the method)
Then again find the download in the "Fetch
Instance" using the Id as "tag".(getDownloadsByTag() method)
If there is a download, you will receive a downloadList whose 0th
element will be your download because I am using one tag per download
and not for group.
Now add the FetchObserver again for that
"tag".
Inside the FetchObserver's lambda, update the progress and other values.
Note : The code can not be shared for non-disclosure purposes. Can share small snippets if you find this confusing.
In my project a wearos app communicates with a handheld mobile app using dataitems. My wearOS app sends data by placing and changing a data item in the data layer.
Before placing the item I want to load/get the item before potentially overwriting its content. I can recieve it using dataClient.getDataItems(). Yet to me this just seems not optimal, I wanna use dataClient.getDataItem(uri). In order to get the specific item I merely need the uri.
uri format: wear://<node_id>/<path>
The only thing I dont know is the node_id of my creator node. Through logging I have seen, that, even doe I create a new DataClient everytime, when I put a new item to data layer, the node id stays same. Yet I couldnt find a way to access the id.
I feel like there should be a simple function like getLocalNodeId() to get the missing uri part. Am I wrong?
No idear, why that took me so long to find:
var node_id = Tasks.await(getNodeClient(context).localNode).id
I am doing direct queries to wikipedia's website via an android app.
However, sometimes when I get "REDIRECT" queries, and my redirect suggestion has a # sign in it, I don't really know how to handle it. I know I can just throw everything out past the # sign, but that means I'm looking up something that is relatively unimportant.
Here is an example link;
http://en.wikipedia.org/w/api.php?action=query&prop=extracts&titles=Poof_(The_Fairly_OddParents)&format=json
I can just redirect to List_of_The_Fairly_OddParents_characters, but I want to know if there is anything useful I can do with the "#Poof" because I'm sure that the information is there for a reason.
I could not find anything on MediaWiki APIs.
Please help!
Thanks
Most of the time the part after the hash is a section title (though it is simply appended to the new URL, so it can be, and occasionally is, used to point to other kinds of anchors), so you can locate the section (with the mobileview action for example) and with the section index you can query the HTML for that section. (extracts does not support sections, so you you must use something else and enforce length limits manually.)
The hash points to a named anchor or ID in the target document. So if you're parsing the page content, then ideally you'd find the anchor tag or ID and return the content that follows that element, rather than starting at the beginning of the content.
So, what I'm actually looking for is this solution: Get/pick an image from Android's built-in Gallery app programmatically but working in a preference and not in an activity.
I created a class that I put in my setting and I want to use that class to be able to find the URI of an image selected by the user on its phone. I couldn't use the code in that link because of "startActivityForResult". Which is not available in a preference.
Any idea how to bypass this ?
PROGRESS REPORT:
So, I tried some stuff in the mean time. Instead, in my settings, I added the following:
<Preference
android:key="test"
android:title="open image"
android:persistent="true">
<intent android:action="android.intent.action.GET_CONTENT"
android:value="image/*"/>
</Preference>
First, instead of "GET_CONTENT", it was "PICK", but with it, I can only go with Google Docs and the Sim Card Tool Kit, which is far from the gallery or any thing to browse the file system.
With "GET_CONTENT", it crashes.
I also added the "android.permission.WRITE_EXTERNAL_STORAGE" premission, even if I just want to read. But I didn't found any (let put this as a sub question, if there's a way to just ask to read and not write).
PROGRESS REPORT #2
I replaced android:value by android:mimeType and I goes directly to the gallery. Now, just need to know if I really got the URI and it's solved.
PROGRESS REPORT #3
At this point, here's the real problem. When I go through my SharedPreferences, the value stays empty, even after selecting an images. So, I guess there a little hack to do. So now, that's the question. Based on the example of my preference screen above, how can I retrieve the value of "test", assuming that when the intent is called, it put it somewhere ?
I finally found a solution... it's not as feng shui as I would like, but it works.
I simply code the preference screen by hand and then I was able to access the "startActivityForResult" function.
From this point, it took 3 to 5 minutes to solve it and finalize all the details.
Hope it helps some people.
You have an example there: http://www.anddev.org/code-snippets-for-android-f33/preference-screen-with-custom-views-t8472.html
But the one I used was on google, but I couldn't find the link.
Looking at content providers, I'm not quite clean on the typical usage of the getType() method. The API doc says about implementing this method that
This allows [applications] to retrieve the MIME
type for a URI when dispatching
intents.
Could anyone describe a typical case where using it would be particularly useful?
For example, you're writing content provider for picture gallery. You should mention in your getType() method that you provide pictures - jpg or png. So, when one will launch image gallery, it will be able to show built-in pictures and pictures provided by your content provider.
In pseudocode the user of contentProvider do something like:
List contentProviders = getProviders();
List resultProviders;
final Type type = Type.JPG;
for (ContentProvider provider : contentProviders) {
if (type == provider.getType()) {
resultProviders.add(provider);
}
}
This is pseudocode, but I hope you will got the idea.
As I understand it, a use case could be the following:
App A contains the content provider. App B uses that content provider to retrieve all the data items from App A. The user then picks one of these (in App B) and after that an activity in App A to show/edit/delete the selected data item should be started. So App B then creates an intent, and to make sure that an activity in App A handles it, you need to set the (mime-)type of the intent to the mime-type of the uri (the show/edit/delete activities in App A has added this mime type to their intent filters).