I have a MVVM app, which needs Bluetooth through the entire app. The only screen that doesn't require Bluetooth is the Onboarding screen. In the first screen, the app starts automatically searching for devices, which requires BLUETOOTH_SCAN to function properly. I have attempted numerous things to request the runtime permissions and check if the Bluetooth is on, but nothing seemed to work. I'd greatly appreciate any help.
I have tried calling the functions in the onResume() of the activity, but it slows down the app a significant lot. I have also tried requesting the permissions when the startScan() function gets called, but that seems to crash, because in order to start the scan I need to have the permissions allowed and the bluetooth adapter should be initialized, a.k.a Bluetooth should be turned on
Did you had a look at this Answer?
https://stackoverflow.com/a/69972855/20356055
It describes very good how to request the bluetooth permissions.
And don't forget to add the permissions in the manifest ;)
Related
I'm trying to troubleshoot an issue on watchOS.
I'm not sure how to reproduce the problem I'm seeing, but I do encounter it occasionally during testing on a real device in the wild, so I'm trying to use os_log in order to diagnose the problem after the fact.
As a first step, to make sure I understand how how to write to the log and access it later, I've attempted to log an event any time the app first loads.
In the ExtensionDelegate.swift file for my app, I added this:
import os.log
extension OSLog {
private static var subsystem = Bundle.main.bundleIdentifier!
static let health = OSLog(subsystem: subsystem,
category: "health")
}
Then, I updated the applicationDidBecomeActive delegate function with this:
func applicationDidBecomeActive() {
os_log("App Started",
log: OSLog.health,
type: .error)
}
I know it's not really an error message, but from what I've read, messages that are not .error are not written to saved to the log for later. I want to make sure it gets written to the log like a real error would.
I installed the sysdiagnose profile, then installed the the most recent version of my app.
After testing the app for the day, I attempted to export the file. Following the instructions I've found elsewhere, I produced a sysdiagnose on Apple Watch by holding the Digital Crown and Side button for two seconds (and felt the haptic feedback when I released).
Then, I put the watch on the charger for a few minutes per the instructions here, which recommended 15 minutes.
I opened the Watch app on my paired iPhone, then went to General > Diagnostic Logs and downloaded the sysdiagnose from Apple Watch, and sent it to my computer with AirDrop.
This gave me a tarball file (for example, sysdiagnose_2021.03.05_17-01-57-0700_Watch-OS_Watch_18S801.tar.gz). Once I decompressed that, I had a folder of lots of files and subfolders.
After poking around in this folder, I figured my best bet was to look in the system_logs.logarchive file. I opened that in the macOS Console app, set the Showing dropdown to All Messages, and looked around the time I opened the app. I didn't see any log output from my app.
I also filtered for "App Started" (the log message from my app) and didn't find anything.
Then, I filtered by category for "health" and didn't find the event I had logged.
Is system_logs.logarchive the correct place to be looking for the log output from my app?
If not, where should I be looking? Or what am I doing wrong?
I really want a better understanding of how I can log messages on Apple Watch so I can view them later so I can make my Apple Watch apps more robust, but I'm at a dead end.
Am I looking in the wrong place? Or am I setting up the logging wrong? Or is it something else? I would appreciate any guidance about this!
According to the Apple Dev Forms, sysdiagnose allows you to view the logs on your apple watch.
I am currently looking through the options of creating an offline indication for the nuxt/pwa project. Since this moment, app is running perfectly offline, but what I want to do is to push a small notification when there is no connection saying something simple such as "you are currently offline".
I can see that there are multiple ways of doing this such as writing the event listener directly in the default layout, but my question is which one is the most suitable and reliable for the nuxt setup.
I think you don't need to write your own event listener, as this seems to be taken care of by the nuxt already. The network status seems to be accessible via $nuxt helper's isOnline and isOffline properties. Check out this example:
https://nuxtjs.org/api/$nuxt/
I have not worked with this yet, but I think it might be what you are looking for.
Note: Make sure to copy the whole link, as stackoverflow cuts it off at /$nuxt.
I want to create a Metro app for learning and personal consumption purposes to do all sorts of low-level device API work, such as tracking power consumption, enumerating processes and calculating CPU usage per process, etc... Unfortunately, these Desktop APIs are forbidden from Metro applications.
My first attempt to work around this was to create a non-windows store C++ library, which has the WINAPI_FAMILY variable set correctly in order to use functions like QueryIdleProcessorCycleTime() and CallNtPowerInformation(). Unfortunately, it is this latter function call that fails when I pass it the ProcessorInformation token in the first argument, with a STATUS_ACCESS_DENIED return code.
Interestingly, CallNtPowerInformation() works just fine when given SystemBatteryState as the first argument, so I imagine there is some kind of access privilege I am missing when running as a Metro app for getting processor info. I read that Metro apps are run with quite restricted privileges, and so I am looking for a way to increase these privileges to allow my API calls to go through properly. To test that it is the process privileges and not a coding error, I used the C++ library from a console application, and everything worked just fine.
I would really like to not have to create a second, desktop background process that does all the dirty work and communicates the results to the Metro app over a socket. I realize this can work, but I would rather have everything housed in the same process space.
I tried using MULTI_MODE_PROCESS above API Level 11. But still I am not getting updating values in activity and values were updated in remote service. I am not able to share preferences in remote service and activity even in froyo,ginger bread versions.Is this a bug in Android ? Any solution we have for this ?
Without code, it's not clear exactly what you're doing, but my guess is that you did the same thing I did at first: simply change your existing call to getSharedPreferences() to use MULTI_MODE_PROCESS and expect synchronization. That's not enough; you also must call getSharedPreferences() again (with the multi-process flag) before accessing the SharedPreferences that may have been changed by another process.
I'm going to preface this by saying that I understand the new Windows 8 application lifecycle and how it is now 100% up to the user to decide if they want to terminate the app or not. So, I guess what I'm looking to find is a way to pseudo-restart my app, although I'm open to other suggestions as I'm pretty new to designing Modern UI apps.
I'm building an app that interfaces with a Web 2.0 service that requires authentication via OAuth. Fortunately the Windows 8 WebAuthenticationBroker makes this simple: it displays an asynchronous modal window that houses the web frame to allow the user to sign in and I get to provide a callback method when its done.
Now, obviously I only want to display this sign-in screen if I don't already have a session key stored for the user in roamingSettings.values. I used the Grid App template in Visual Studio, and I execute these functions in default.js as soon as the app is activated (checking roamingStorage, calling WebAuthBroker, etc). Now, the Grid App template provides a data.js to allow me to define some of the REST endpoints that I want to fetch. The main problem is that I can't fetch these REST endpoints until the user is authenticated! Yet they still have to (at least, I think) be declared in data.js ahead of time. So what I'm doing now to avoid errors in the event that the user isn't signed in, is the following:
if (roamingSettings.values[sessionKey]){
list = getFeedItems(); // my function that issues all the REST calls
} else {
list = new WinJS.Binding.List();
}
This works fine if the app is manually restarted after authentication is complete, but I would really rather have a way of completely reloading the app asynchronously after authentication is complete. I've spent a ton of time on this already and I'm getting extremely annoyed because I've seen other apps do this (Instametrogram, for example).
Any ideas?
To answer the core question here, how do you soft restart: window.location.reload() is all you need. This just does the refresh in place.
However, what you are actually looking to do is reset the datasource on the ListView instance -- all you need to do is get hold of that control at runtime, and re-assign the data source to it. E.g.:
var lv = document.getElementById("myListView");
lv.winControl.itemSource = list;
An example of this should also be in the app you have from when it currently assigns the list to the listview.