Can I access an app’s data folder by installing a custom build of that app?

I want to access the data for two apps (Mozilla Firefox and Google Authenticator) on my non-rooted[1] Android 6.0.1 phone, to transfer it to a new phone.

Unfortunately, both of these apps have android:allowBackup and android:debuggable set to false in their manifests, which prevents backups using adb.

They store their data here:

/data/data/org.mozilla.firefox/ /data/data/com.google.android.apps.authenticator2/ 

Using the Android dev tools, can I just install a custom build or modified APK of these apps with the appropriate flags set? Or will that wipe the app data, or would the certificate mechanism prevent me from installing such an APK?

[1] Rooting using Towelroot is not possible due to a reasonably up-to-date kernel. “Kingroot” is perhaps possible but looks too fishy to me. I understood that unlocking the bootloader would wipe the device, losing my app’s data.

Digital Apps blog, suitable for tech niche

Why are you selling this site?
I don't have enough time to operate the site to its full potential

How is it monetized?
via Google AdSense or any other CPC or CPM method you prefer

Does this site come with any social media accounts?
No but i can setup them for the buyer according to what they request

How much time does this site take to run?
usually 2 or 3 hours daily do add contents would be enough

What challenges are there with running this…

Digital Apps blog, suitable for tech niche

Third-party contact apps to backup contacts to Google from Samsung devices

The Contact apps that ships with Samsung devices does not seem to have a function to reliably backup all contacts on the phone and SIM storage to Google accounts.

Is there any third-party app that’d let me reliably do so? Bonus points if it’d let me sort which contact goes to which Google accounts registered on the device.

As a last resort, if there’s no such app, I don’t mind if I can get to backup to storage with which I can transfer the contacts to a different device.

PS I intentionally point to a specific model because I need to do so from two different Samsung devices and both their contact apps did not let me move all contacts to Google account. One of them does have .vcf export, but the other doesn’t. I want a more universal solution if at all possible.

PPS The device that can do .vcf export has Google accounts correctly setup on both the new and old devices but all contacts has not been synced, hence the question.

How to prevent an app’s notification from updating while the screen is off?

I have a bootleggers ROM (Android 9 pie) installed on a Motorola Moto E 2015 phone. I have a setting, enabled in adaptive display settings, which makes the screen to turn on, when a new notification is received. It is a good feature, but my music player (AIMP) updates it’s notification each time a new song starts playing, which makes the display to turn on (pulse) often and use additional battery. I could avoid that by turning off the notifications for AIMP completely, but I want to see the notification when the screen is on.

Is it possible to prevent the notification from updating while the screen is off?

Another way to solve this would be to turn off the notifications for AIMP, when the screen is turned off, and then turn them on again when the screen turns on (using tasker, for example). But the drawback of this approach is that once turned on, the notification does not appear until the next song, so it is not possible to see the current song in the notification this way.

Remove Apps from iPhone

How to remove app from an iPhone? That is easy with current ID installed app. But when the app is installed by an old ID which is removed from iPhone by now, how to do that?

Those apps were installed by an old ID. The old ID is removed.

From the new ID – When I hold the app icon on home screen, the ‘x’ icon to remove does not appear. At ‘Setting -> General -> iPhone Storage’, the uninstall option does not appear.

This is a company owned iPhone and the previous ID is removed.

Remove Apps from iPhone

How to remove app from an iPhone? That is easy with current ID installed app. But when the app is installed by an old ID which is removed from iPhone by now, how to do that?

Those apps were installed by an old ID. The old ID is removed.

From the new ID – When I hold the app icon on home screen, the ‘x’ icon to remove does not appear. At ‘Setting -> General -> iPhone Storage’, the uninstall option does not appear.

This is a company owned iPhone and the previous ID is removed.

How does ui ux design work for android apps

How does a ui/ux designer provide android app designs? As far as I know a designer will provide a psd file to the developer. But android apps come in different screen sizes. So how does the developer get their required image/icons in different sizes?

Also does the designer need guidlines from the developer on sizes or ratios? example- this icon needs to be of this size.

Or does the designer just give one psd and developer converts them for different screen sizes?

What are the best practices of designing database to serve multiple apps within one ecosystem?

To clarify the question here is the scenario. There is a web app which implements RESTfull API with JWT authorization. It runs on PHP/mySQL at the back and Angular2 in front.

Then comes another app which would need to use the same user credentials as the first one but it has its own context. The two apps will integrate with each other over time more and more, however the extent to which they will integrate with each other is still unclear, except for authorization and subscription payments. Think Atlassian ecosystem as a broad example of integration and account administration.

How would you design the database and APIs around it in such a case?

How to format the time in this Google Apps Script

I want to format a Google Sheet cell when I read it in my script but it comes out 25 minutes later.
The cell’s time is 20:00:00 but the output is 20:25. I am using this

var formattedDate = Utilities.formatDate(time, "GMT+2", HH:mm"); 

Without using it the time comes as 1899-12-30T18:25:08.000Z even though the cell’s content is 20:00:00. Any ideas?