herald-for-android | Reliable mobile Bluetooth communications - Android library | iOS library
kandi X-RAY | herald-for-android Summary
kandi X-RAY | herald-for-android Summary
This is a new, original, free and open source cross-platform proximity detection solution that has been developed according to epidemiology requirements (Ferretti, et al., 2020) for controlling COVID-19. This Bluetooth Low Energy (BLE) based solution offers accurate and frequent distance measurements between phones running iOS 9.3+ and Android 5.0+, including devices that do not support BLE advertising (circa 35% in the UK).
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Initializes the payloads of the given sensor
- Triggers the reading of a sensor
- Marks the sensor as being detected
- Process a sensor
- Synchronized
- Broadcast a characteristic write
- Detects signal characteristic data type
- Starts an advertising entry
- Starts Bluetooth server
- Encrypts data using AES - 256
- Deterise point measurements
- Initializes the sensor
- Analyzes the source and output
- Decrypt data
- Registers a social mixing score unit
- Called when a Bluetooth device is discovered
- Get payload sharing data for a given peer
- Broadcast a characteristic
- Analyze data
- Clicked click on a temporal history unit
- Read data from the log file
- Performs the performance test of this class
- Called when a device has been updated
- Returns a view at a specific position
- Decodes a base64 string
- Creates the initial state
herald-for-android Key Features
herald-for-android Examples and Code Snippets
Community Discussions
Trending Discussions on Mobile
QUESTION
so I'am trying to learn dart and flutter and everything went well so far. But now I'am stuck at an error which I cannot handle. I coded a function which is supposed to asynchronously return the actual BTC price from https://blockchain.info/ticker.
Only thing it returns is errors:
...ANSWER
Answered 2022-Mar-29 at 00:29To get rid of that error you need to use the bang operator to tell the compiler that snapshot.data won't be null.
QUESTION
ANSWER
Answered 2022-Mar-19 at 06:15My suggestion is to use ion-footer.
QUESTION
Very new to react native and javascript... I am trying to call a function and it doesn't seem to do anything.
Here is the fragment of code where the function is called:
...ANSWER
Answered 2022-Feb-24 at 16:20You need to start your component with a capital letter:
Note: Always start component names with a capital letter.
so change renderButtons to RenderButtons
QUESTION
What I'm trying to do is make a counter in Flutter which will be in this shape:
I'm fairly new regarding flutter and dart so I have tried to put this element inside of a Card but yeah I faced some issues due to overflow and it would be great if someone could give me a hint or point me to the right direction.
Here is my code for counter:
...ANSWER
Answered 2022-Feb-09 at 20:19Create a container and add decoration to it. Then inside the container use a row widget. In row use Iconbutton and text .
QUESTION
I'm building an app where I have a page which gives information about a specific trading card. I want the page to be scrollable, but I also want to have a grid on the page, with each grid cell showing one data point. I made the grid using GridView.count().
My problem is that instead of have a page which I can scroll through, the top half of the page stays static, while the grid is scrollable. How do I make the grid static, while the rest of the page scrollable? I intend to have more data below this grid as well, and I want to user to be able to scroll to see all of it, with the grid being a static component of the page.
Here's my code:
...ANSWER
Answered 2022-Feb-06 at 09:47You can provide physics: NeverScrollableScrollPhysics() on GridView to disable scroll effect. If you want scrollable as secondary widget use primary: false,
To have Full Page scrollable, you can use body:SingleChildScrollView(..) or better using body:CustomScrollView(..)
QUESTION
I am posting this question to help future readers. After upgrading to Flutter 2.8 I suddenly got this error when trying to run my app:
ANSWER
Answered 2021-Dec-26 at 14:20Turns out this error was caused by a popular library I used (settings_ui) that does not work with this version of Flutter (settings_ui: ^1.0.0).
For future readers: Use a later version of this package. There is currently an open issue on github that addresses this.
Update 2022: Dev on settings_ui seems to have gone AWOL and no longer merging PR's the community has forked this project to: https://pub.dev/packages/flutter_settings_ui and here updates are properly merged and a fix has been released in version 1.0.1
For people facing this issue now:
As a monkey patch you can follow the steps in the GitHub issue and edit the package files locally:
In cupertino_settings_item.dart
change final ListTileTheme tileTheme = ListTileTheme.of(context); to final tileTheme = ListTileTheme.of(context);
And change _iconColor(ThemeData theme, ListTileTheme tileTheme) to _iconColor(ThemeData theme, ListTileThemeData tileTheme).
QUESTION
I use this code to scroll:
...ANSWER
Answered 2021-Oct-26 at 05:16what i did, use a listView and reverse true and in children use the list of map.reversed, i am giving you my code example below.
QUESTION
I am fairly new to the Firemonkey framework after working with VCL for many years so hopefully this question is not too simple.
I am listing Dynamic Listview Items which I update from a database. I have created the position/layout of the text within the Listview Item using design mode . My question is when I change screen orientation from portrait to landscape do I have to manually change the 'X' position of the text items located within my listview and their width so that the full landscape width of the screen is utilized? There appears to be no anchors for dynamically created Listview items. (The text items just have their generic names for the time being.)
I have a pic below of what I am trying to describe. First pic shows deign mode in portrait and second in landscape.
Any suggestions greatly appreciated.
...ANSWER
Answered 2021-Dec-22 at 23:30The Accessory, Detail and Text items have an Align property that can take values Center, Leading or Trailing. They are recalculated and adjust their position with changes in the screen orientation.
Additionally some items have a separate property, TextAlign, which sets the position for a text within the space of the Align result.
QUESTION
I used this flutter package to implement a color picker in my app. My Widget looks something like this:
ANSWER
Answered 2021-Dec-19 at 00:02please check out this and you need to palette type as paletteType: PaletteType.hueWheel,. use the same package as used.
QUESTION
I have a mobile application developed using Ionic. Now I want to redevelop it in flutter and publish a new update, would that be possible? will google play and AppStore allow that?
...ANSWER
Answered 2021-Dec-17 at 19:07There is no constraint on development language. But,
- You need to use same certificates/keys for iOS App
- You need to use same key-store/keys for Android App
- If you are using local database or file storage, then you should follow the same path in your newly created app as well. If you are using any third-party library to manage the db or file paths, then it may be in different location altogether. (This one actually happened to me. When I migrated my app from a cross-platform framework to Native the database path got changed in release version)
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install herald-for-android
Hardware Apple computer (MacBook Pro Late 2013 to Late 2019) running macOS Catalina (10.15.4). One or more Apple iPhones (iPhone 4S, SE, 5, 6, 7, X, 11) running iOS (9.3 to 14.2). One or more Android phones (Samsung A10, A20, A70, J6, S10) running Android (8.0 to 10.0).
Software Xcode (11.7) for building and deploying the iOS app to test devices. Android Studio for Mac (4.01) for building and deploying the Android app. RStudio for Mac (1.3.1073) for analysing, visualising and summarising test results (optional).
Clone iOS and Android repos in Xcode and Android.
Build, deploy and run test app on iOS and Android devices with Bluetooth OFF.
Allow test app to access Bluetooth and Location, move app to background, and lock test devices.
Switch Bluetooth ON while devices are locked and app is in background to start test.
Place devices within 8 metres of each other and wait for 10 to 30 minutes.
Switch Bluetooth OFF while devices are locked and app is in the background to end test.
Open app on each device to quickly check other devices were detected and most recent detection time.
Download plain text CSV log data files from each device for detailed analysis.
The proximity detection solution has been integrated into a standalone test app on iOS and Android for ease of evaluation, and to demonstrate how it can be applied in your own apps. The test app will detect, identify and measure distance for all iOS and Android devices within detection range, present the results on a simple user interface, and also write the results to local device storage for download and analysis.
Open Xcode.
Select menu item Source Control > Clone to clone the iOS repo as a new project.
Select Target > Signing & Capabilities to edit Team and Bundle identifier to resolve name clash if required.
Select Herald.xcodeproj then select Target > Signing & Capabilities to edit Team and Bundle identifier to resolve name clash if required.
Connect iPhone to computer with USB cable, unlock device, select device in Xcode.
Select menu item Product > Run to build and deploy test app.
Expect the test app to open on the device.
Open Android Studio.
Select menu item VCS > Git > Clone to clone the Android repo as a new project.
Select menu item File > Sync Project with Gradle Files to show both app and herald modules.
Select menu item Build > Make Project to build app and herald modules.
Enable Developer Mode on Android phone (Settings > About > Software > Tap Build number repeatedly).
Connect Android phone to computer with USB cable, select device in Android Studio.
Select menu item Run > Run 'app' to build and deploy test app.
Expect the test app to open on the device.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
