Download Android Sdk Offline
Angelo Dearring
By enabling persistence, any data that the Firebase Realtime Database client would sync while online persists to disk and is available offline, even when the user or operating system restarts the app. This means your app works as it would online by using the local data stored in the cache. Listener callbacks will continue to fire for local updates.
The Firebase Realtime Database client automatically keeps a queue of all write operations that are performed while your app is offline. When persistence is enabled, this queue is also persisted to disk so all of your writes are available when the user or operating system restarts the app. When the app regains connectivity, all of the operations are sent to the Firebase Realtime Database server.
If your app uses Firebase Authentication, the Firebase Realtime Database client persists the user's authentication token across app restarts. If the auth token expires while your app is offline, the client pauses write operations until your app re-authenticates the user, otherwise the write operations might fail due to security rules.
The Firebase Realtime Database stores data returned from a query for use when offline. For queries constructed while offline, the Firebase Realtime Database continues to work for previously loaded data. If the requested data hasn't loaded, the Firebase Realtime Database loads data from the local cache. When network connectivity is available again, the data loads and will reflect the query.
Assume that the user loses connection, goes offline, and restarts the app. While still offline, the app queries for the last two items from the same location. This query will successfully return the last two items because the app had loaded all four items in the query above.
If the app were to request the last six items while offline, it would get 'child added' events for the four cached items straight away. When the device comes back online, the Firebase Realtime Database client synchronizes with the server and gets the final two 'child added' and the 'value' events for the app.
Even with persistence enabled, transactions are not persisted across app restarts. So you cannot rely on transactions done offline being committed to your Firebase Realtime Database. To provide the best user experience, your app should show that a transaction has not been saved into your Firebase Realtime Database yet, or make sure your app remembers them manually and executes them again after an app restart.
For many presence-related features, it is useful for your app to know when it is online or offline. Firebase Realtime Database provides a special location at /.info/connected which is updated every time the Firebase Realtime Database client's connection state changes. Here is an example:
Is there a setting I'm missing to use the Android app in offline mode? My home network isn't exposed publicly. It would be the PERFECT program if the app supported an offline mode for shopping. Download the shopping list created in the site and while at the store, scan the item on the list with the scanner, then upload when home and connected to the site to update the inventory with the newly purchased items. If this is already implemented, can someone point me to the setting?
I have a 14 hour flight soon and so I bought the android version so I could play it on my tablet during the flight. I disconnected from my wifi to try to play and I'm just stuck on the login page with an option telling me to "purchase the full game" even though I already bought it. I'm really frustrated right now. Device is Samsung Tablet S7. Feeling pushed to pirate a game I already own (on two damn platforms) since they're making it hard to enjoy it. The game isn't even opening anymore (even with internet), just keeps crashing.
Business Calendar 2, and Business Calendar 2 Pro appear to suffer from a serious bug that makes successful export/import impossible and poses serious privacy/security issues. See -deleted-offline-calendar-events-in-android-actually-deleted
vcCalendar Lite looked promising. It has a completely offline calendar mode that does not even use Android's calendar system. But when editing a recurring event to specify an end data, the user loses every edit they made to that series. For example, if the user had deleted the second event in the series, it will suddenly reappear.
RockPaperLz - I know your post is from many years ago now, but it still has value here in 2022! In 2022, by finally moving off of my very first old smartphone from 2016, I just now learned about the dreaded Android offline calendar "marked for deletion" phenomenon. Here is how I solved my situation - which for people like you are me, is not normally encountered by most Android users (who willingly give Google their data...). My story:
Edit: I noticed deleted events (even from years ago) in my .ics export, like you mentioned. I investigated, and initially thought that the problem didn't happen with Etar, so I mistakenly thought Samsung's S Planner was the culprit. However, I tried to reproduce the problem again, and found out that whether this problem occurs probably depends on the version of the com.android.providers.calendar (Calendar Storage) system app. I've updated the answer at security.stackexchange.com to reflect this as well.
With some other apps (like Samsung's S Planner) I noticed the same export issue that you mention (about deleted events still appearing in calendar exports). Etar doesn't suffer from the same issue, deleted events are properly cleaned up (even if you use local/offline calendars rather than cloud-based calendars).
Theoretically you can work offline by going to File > Settings > Build, Execution, Deployment > Gradle and checking Offline Work. You will unfortunately have to sync the project while on a working internet connection at least once to have the necessary dependencies downloaded for your project.
If you allow me the comment, it would be even greater, if useres could know that (and all the other innovations and changes since v1.0) from the user manual @ docs.nextcloud.com/android/android_app.html
It is an Excel-sheet which lies on the NC 15.0.5 server and which I edit alternately on Win10 PC and on my Sony XA smartphone (with the original MS Excel App). It seems that edits on the android are synched to the server correctly, but when I edit on the Win-side the sync to android is broken. You can see the red dot with cross inside in the nextcloud client at the file, and when I try to open it with the Excel App there comes a message that there is a conflict between server and client.
It seems that edits on the android are synched to the server correctly, but when I edit on the Win-side the sync to android is broken. You can see the red dot with cross inside in the nextcloud client at the file
Mark files or folders "offline" to read them anytime, even when you aren't connected to the Internet. Offline edits made to the files sync the next time your Android device connects to the Web, so you get the latest version of the file.
Once you mark a file or folder offline, OneDrive also lists it in a Files Available Offline view. Tap the Me icon at the bottom of the app, tap Files Available Offline to instantly find all your offline files and folders.
To always have access to a file on your PC or Mac, right-click the file and select Always keep on this device. The file will download to your device and will always be available even when you're offline.
I want to develop a full offline app, where the map data is included in the apk, for android (java). First I started using the mapbox sdk but unfortunately I noticed that they have a tile limitation of 6k Tiles and I couldn't figure out how to load OpenStreetMap data...
when i use my form offline, it initialized correctly, but when i try to get list and show some views (and initialize them) i get the following message:
what can i do about it? are there any other things i should do differently , when it comes to offline mobile forms.
You will see that there are a number of considerations you need to take into account when creating a form for offline usage, one of which is the need to execute any submit rules within a "batch" execution type. One thing to be aware of when using a batch execution type, is that you cannot guarantee the sequence of execution of rules e.g. you might have 2 rules, the first of which creates a parent record and returns an ID value which you use in a second rule to create one or more child records. All the rules within the batch execution type will execute at the same time, which means that you cannot guarantee that rule 1 will execute before rule 2.
Is there for Android an app or something that is like Google Forms but works completely offline and allows to feed a table such as Excel (or any other excel-similar format) with simple data (words, numbers)? I didn't find any solution to this but can't believe that it doesn't exist! I would like to track my spending and therefore it would be much easier to have a form to enter the data on my Android instead of always opening an Excel or Open Office sheet on my Android.
ArcGIS Field Maps stores offline replicas in an SQLite database or runtime geodatabase (as .geodatabase files) before they are synchronized to the feature service. In the event the offline edits cannot be synchronized, the locally stored edits are extracted from the mobile device and converted to a file geodatabase. The instructions provided describe the steps to do this in ArcGIS Field Maps on iOS and Android operating systems, and how to work with or convert the recovered data in ArcGIS Pro.
In online operation, you read to and write from a IRemoteTable. When using offline sync, you read to and write from a IOfflineTable instead. The IOfflineTable is backed by an on-device SQLite database, and synchronized with the backend database.
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