I'm using a flutter for a new project and everything's been great until today.
The app we're building allows our employees to download and view some internal file types on their devices. One feature request we have gotten is to show how much storage space the device has left. Some of our employees download a lot of files and keep running out of space. I tried searching for a way to do this but I can't find anything. It's the first time so far I've been completely blocked using Flutter.
Does anyone know of a way to get the fee storage space a device has for both iPhone and Android?
This is a perfect use case for platform channels which could be part of your main project, or implemented in a plugin.
On Android, use StatFs; on iOS use volumeAvailableCapacityForOpportunisticUsageKey.
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I'm trying to create a map viewer for an existing C# WinForms application. I've installed and hooked up the GreatMaps (GMap.net) controls no problem and that's all working fine. The quirk in this is that it needs to work offline (as it's an application that gets used by users who aren't always in locations where there's a mobile signal).
The offline cache mode works fine for GMap but, we've got to build the cache beforehand which we can do but, as we need the whole of the UK, will be a pain (especially as we have to go down to street level).
Does anybody know if there any existing cache files that we can download and use? I've looked at downloading OSM files but haven't got the faintest idea how to use them, convert them (into the gmdb format that GMap seems to use).
Any ideas?
Check out VectorTileRenderer (https://github.com/AliFlux/VectorTileRenderer) which has a demo for Gmap.net. All you need is an MBTiles file which you can download for free at OpenMapTiles.org (https://openmaptiles.com/downloads/europe/british-isles/)
I am new in reactjs and I have a task in hand. I need to be build and application which is capable to scan a mykad(Malaysian ID card) through camera. Details like name, address, image can be extracted. I googled a bit about open source tesseract but it is not giving me the right information and also some of the informations are misspelled. If anyone can guide me in the right direction.
Eventually I will develop a PWA and deploy in mobiles as well
If you're looking for a free solution, Tesseract.js is your way to go: https://tesseract.projectnaptha.com
You need to be aware that reading data from MyKads will not only require OCR component, but also specifying semantics for the document. Meaning, you'll need to tell tesseract where the name is, where the address is, etc.
Also, tesseract will not be able to detect the document on the image. For this you'll need to use a different tool.
Disclaimer: I'm working at Microblink where we develop commercial OCR products, including one for reading data from IDs. For PWAs we have an JavaScript / TypeScript component which uses WASM to process the IDs. It supports not only MyKads but more than 500 document types in the world.
Github link: https://github.com/BlinkID/blinkid-in-browser
I've read a few threads where this is discussed. Shai's response has always been that files can only be read, but not written into shared locations
Perhaps saving other type of files isn't so simple but shouldn't there be an option for saving pictures in CN1?
I haven't seen the Whatsapp Clone code, but if it truly is a clone shouldn't it have the option to share pictures (and possibly files). Or is it a simple text chat that perhaps shares pictures that can never be saved outside the app?
I also read somewhere (6 months ago) that Shai said that this should be a feature of CameraKit. Does this mean that this feature is in development? If so, that would be great. But having an ETA would also be great to align with our own devs
If it isn't being developed, can I at least know if this is something I can develop natively within CN1?
We expose the full file system so you can write to any place the native App can write to. Native apps don't have write access to the gallery directory and need to explicitly request it to put a file there. This can be accomplished easily in any external cn1lib (e.g. we could do it in camera kit) but haven't done it for camera kit or the whatsapp clone.
AFAIK there's no RFE open on this feature so I can't even tell you if it's assigned to a specific milestone.
Part of the process used in my app involves taking a photo (done with Capture.capturePhoto()). The photo is then resized to a small square of 200px and finally sent to a server.
I am able to delete the resized image with FileSystemStorage.delete() however the initial photo taken with Capture.capturePhoto() cannot be deleted because of the app being sand boxed (as described in this SO question )
This can be embarrassing for the user because these photos are polluting their gallery (the photos have no value for the user).
As deleting the initial photo is not possible, I was wondering if I could force the Captured photo to be stored in cache so that it gets automatically removed by the OS.
Maybe this question could be a solution for Android but I would prefer to avoid having to go native?
Consequently is it possible with Codename one to take a photo that will only be temporary and be deleted automatically ?
Thanks a lot,
Cheers
We try to delete the file automatically but since the OS takes the photo some platforms just stick it in the gallery and there isn't much we can do there. It's literally a matter of "this works on Android device A and fails on Android device B".
Apps like snapchat etc. don't use the device camera app but instead use the low level camera API's which are more complex and flaky. At this time we don't map these API's in Codename One so if you need something with lower level control you will need to use native interfaces. This is a non-trivial API though.
I am planning to develop a hybrid mobile app using ionic. One of the features i need is offline google map. Is there a way how to do it?
It depends on the requirements of your application whether this will be possible. Are your users on "modern" devices A.K.A is HTML5 fully supported? Do your users need to view/edit the map globally, or just in a specific area? Does the map really need to be provided by google? I'll address some issues below to point you in possible takes on this problem.
Do you really need google maps? (Most optimal scenerio)
First of, do you really need google maps? Also relevant: how far do your users need to zoom their maps? If it can be any maps, and zooming is not really of high priority (if it is, including all map tiles will make the app eat all storage), you could probably use map-tiles as a packaged part of your app, and display them with a library like http://leafletjs.com/. The library is well documented, and provides a map-interface for a variety of map-providers. It will be do-able to configure this to use your own local map-tiles. You could include map-tiles for multiple zoom levels if necessary, and limit the min/max zoom-levels to the tiles you actually have available. This will make your maps work offline.
I can't or don't wan't to provide my own tiles make sure that you really looked into the option, there is systems out there that provide map-tiles you could use (check https://www.mapbox.com/ for example)
Okay, so you really don't want to do what I suggested. What are the options now? Javascript mapping-solutions typically render tiles based on the location of the map you want to see and the zooming level. These tiles are requested to the tile-provider. I do not know how to implement this for google exactly, you might need some research on this - I'll try to help you see a direction. There will be requests to get the tiles from the servers. I checked with http://maps.google.com what images are loaded when trying to navigate the map: (example (click)). Find out what url's are used in your situation, we will need these kind of url's later (just inspect the network tab in your browser console and see which requests are made when scrolling in your map). When we only need our users to work in a certain area when offline we could use service workers to cache the responses of these requests when we are online, and serve those caches when we are offline. Read more on service workers here (click).
Advantage: Real offline map-functionality for any tile you visited before (as long as your cache wasn't overflown, depending on your implementation of the service workers, and for service-worker supported browsers/devices).
Disadvantages: No support for tiles that were never put in the cache (AKA: never seen before). Another one: this will only work for devices that support service workers. Might be an option in situations where you either don't care about users using "older" devices, or where you can control the user's device choices. Note that using crosswalk could ease your developing efforts here, since you only have to consider one browser-runtime then: but crosswalk also doesn't support older devices.
However: This solution could be fine for people that will need to work in a specific area, which might be true for the case provided by #vipul-r If you or your users know in advance where they need their maps to work, you can instruct/help them in loading & caching their maps correctly.
If you can't work on either of these 2 solutions, then I highly doubt there will be a way to do it. I don't see any other way to the best of my knowledge.