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    Android Dev - Weekly Questions Thread - February 09, 2021

    February 09, 2021

    Android Dev - Weekly Questions Thread - February 09, 2021

    Weekly Questions Thread - February 09, 2021

    Posted: 09 Feb 2021 06:00 AM PST

    This thread is for simple questions that don't warrant their own thread (although we suggest checking the sidebar, the wiki, our Discord, or Stack Overflow before posting). Examples of questions:

    • How do I pass data between my Activities?
    • Does anyone have a link to the source for the AOSP messaging app?
    • Is it possible to programmatically change the color of the status bar without targeting API 21?

    Large code snippets don't read well on reddit and take up a lot of space, so please don't paste them in your comments. Consider linking Gists instead.

    Have a question about the subreddit or otherwise for /r/androiddev mods? We welcome your mod mail!

    Also, please don't link to Play Store pages or ask for feedback on this thread. Save those for the App Feedback threads we host on Saturdays.

    Looking for all the Questions threads? Want an easy way to locate this week's thread? Click this link!

    submitted by /u/AutoModerator
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    Terraria on Stadia cancelled after developer's Google account gets locked

    Posted: 08 Feb 2021 10:25 AM PST

    How do you guys do TDD (unit test) with Android Studio?

    Posted: 09 Feb 2021 02:16 AM PST

    How do you guys do TDD (unit test) with Android Studio?

    I always try to start a new public functions with several open tests where my return expectations are defined.

    I come from a Typescript development background and I am a fan of TDD. When working in typescript projects I can (in WebStorm) run my tests with a watch flag to let my tests run again when I change a source or test file.

    But even when Android Studio shows a "toggle auto-test" button, it does not do anything and I have to always trigger the "re run" test manually.

    ​

    Toggle auto-test in Android Studio

    How do you guys do TDD in Android Studio?

    submitted by /u/distante
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    Google and the Android Team joins the Rust foundation

    Posted: 08 Feb 2021 12:12 PM PST

    raywenderlich android course

    Posted: 09 Feb 2021 08:26 AM PST

    I was thinking to take the raywenderlich android course but their are no reviews .can anyone give a short review about their courses please. And does they cover all the topics via tutorial or i need to read the books for that particular topic.

    submitted by /u/Wonderful_Leader_241
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    how to send a data from Arduino to simple custom android app

    Posted: 09 Feb 2021 07:24 AM PST

    I am absolute beginner in android app my background is web development. I would like to send a data through REST API from Arduino to a simple a Android application, but I need it send from one direction just from Arduino to app only. if any data sent from Arduino shows without refreshing IDK how that implement in Android app

    submitted by /u/Khaldon_MK
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    Is there a way to check if someone redeems a promo code for a paid app? (Similar to seeing who purchased an app)

    Posted: 08 Feb 2021 10:25 PM PST

    Are redemption codes ghost purchases? Or is there some hidden interface in the Google console to actually see the code redemptions?

    submitted by /u/poetryrocksalot
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    Any idea about how to use Android Emulator M1 preview with intelli J

    Posted: 09 Feb 2021 06:59 AM PST

    I'm having a M1 MBP 16gb ram. For me android studio is slow as it is not ported natively on Apple silicon so. I downloaded Intelli J which is natively available but when I run the android emulator and press run button it is not deploying in the emulator but intelli j detect the android emulator. How to solve it

    submitted by /u/kudoshinichi-8211
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    Access to raw network data

    Posted: 09 Feb 2021 06:36 AM PST

    Hi,

    I'm building an android app in React Native. React Native is mostly for the UI. The app has a module written in C that contains an algorithm that processes network data. I need to give the C module access to raw network data, essentially to measure traffic volume. Appreciate any thoughts, or pointers in the right direction.

    submitted by /u/flipyouforreal1
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    Inapp purchases - hot to reliable keep track of user purchases on multiple devices (is it enough to only call queryPurchases()? Or do I also need queryPurchaseHistoryAsync()?)

    Posted: 09 Feb 2021 01:31 AM PST

    I read official google in-app payment docs, and it is such a frustrating experience...Whole documentation is very vague and unclear.

    For example it recommends to use cached method queryPurchases() - but what if user buys a new device? or delete google play cache? Not a single word about these cases...And not a single word about refunds.

    Other tutorials, and some examples sometimes use also server method queryPurchaseHistoryAsync(), but it does not seem to make much sense either, because this is all what google documentation says:

    void queryPurchaseHistoryAsync (String skuType, PurchaseHistoryResponseListener listener) Returns the most recent purchase made by the user for each SKU, even if that purchase is expired, canceled, or consumed.

    So basically it also returns refunded or cancelled orders - and it is not possible to distinguish between orders, which makes it effectivelly useless.

    Can anybody please point me in the right direction, where is the whole thing explained properly?

    All I want to know is how to reliably keep track of active user purchases, so I can unlock content on multiple devices. Also how to handle refunds? (whether manual by me, or automatic 15-minute refunds) and again, reflect this on all user devices?

    How to achieve this? Is there any good info about it out there? Thanks a lot!

    submitted by /u/throwaway41142095
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    App promotion with GoogleAds

    Posted: 09 Feb 2021 05:11 AM PST

    Hi, im also currently trying to promote my app with google ads. I got a 120$ bonus when i invest 120$.After the first day i got a lot of clicks but not many installs. It´s about 1$ for each install.I'll get poor before I have a few installs:-(

    submitted by /u/Shoddy-Recording-178
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    Best processor for running multiple emulators at the same time

    Posted: 09 Feb 2021 05:05 AM PST

    I'm planning to test an app on multiple emulators at the same time (15-20 emulators running at any time).

    I'm not really a hardware guy and I'm not so familiar with android studio emulator requirements either. What would be a good processor for this purpose? The budget is around $500-700 for the processor alone. What should I be looking for? As many cores as possible? Or maybe a big number of PCIe lanes? (like in the threadripper)
    Thanks!

    submitted by /u/Zapakitu
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    Should i comply to Google Policies also on "alt" stores or only on Google Play Store?

    Posted: 09 Feb 2021 04:55 AM PST

    I would like to distribute an alternate version of my app through third party stores, that version would not comply with Google Play policies (it will have some extra permission mainly). If i sign the app with the same key and give it the same package name could i still be banned from the main store or these rules do not apply if an app is installed from a third party tool?

    Off course i am not talking about a malicious app, just an app that requests permissions that cannot normally be granted (es reading SMS or Calls log to implement an unread counter)

    submitted by /u/Ultramen
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    Any tips for improving this word guessing game design? maps, rewards, characters and ....

    Posted: 09 Feb 2021 04:45 AM PST

    How to make Sorting visualizer and pathfinding algorithm visualizer?

    Posted: 09 Feb 2021 02:47 AM PST

    Bare with me as I am a complete noob. Most of the tutorials I see on Internet use JavaScript to make these visualizers and all I know is Android studio and java. I was just wondering if it's even possible to make an app showcasing these 2 visualizers just using Java and Android studio.

    submitted by /u/masculinetailor
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    Possible? Run App on Button-Combination

    Posted: 09 Feb 2021 02:14 AM PST

    Hey, I'm thinking about creating an App. But for this App it would be vital to be started from the Lockscreen with i.e. pushing the louder and lock button on your phone. Is something like this possible without having a rooted device?

    submitted by /u/archimedes839
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    How many of you use your own thread pools when working with Coroutines?

    Posted: 09 Feb 2021 01:27 AM PST

    I'm currently adding support for Coroutines to an app I'm working in and I'm wondering if the current thread pools provided by Kotlin are enough to any Android app. I'm talking about the threads used by Dispatchers.IO and Dispatchers.Default under the hood.

    What are your experiences using these Dispatchers? Have you ever had to provide a custom thread-pool to the coroutines engine? Thanks

    submitted by /u/peterstark4
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    Shady OEM battery optimization practices

    Posted: 08 Feb 2021 09:41 AM PST

    As you may already know, for years now, OEMs have been altering internal core Android components for the sake of battery optimization, while breaking basic functionality that we rely on for building our apps. These include things like blocking broadcast messages, disabling wakelocks, and terminating background services/apps.

    In the last Android 11 AMA, the Android team promised to look into this issue, and implement some measures to make OEMs be more transparent about their activities, such as alerting users about OS restrictions that are being applied on apps.

    Nothing has changed since then however. Samsung, in its recent Android update, has implemented even more shady tactics, making it virtually impossible to do anything in the background, all without user consent or notification.

    This has to stop. Google has to act, and the only way that can happen is we (the community) make Google understand that we are not willing to put up with shit like this anymore.

    If you have a moment, please read and star this issue so that it can get some attention from Google.

    submitted by /u/black__
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    Google hints at Android 12 launch; expected to drop first beta this month

    Posted: 08 Feb 2021 10:48 PM PST

    Is there any way to have a MacBook Pro *NOT* charge a USB-C phone (e.g. S10) while it's plugged in but still have ADB etc?

    Posted: 08 Feb 2021 02:12 PM PST

    I'd love to use wireless ADB but unfortunately I don't have the option in this scenario.

    The phone has an option which allows me to charge my MacBook from my phone (!) but I can't find a way to have data transfer with no charging either way...

    submitted by /u/ClassyJacket
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    Link to Android command line tools

    Posted: 08 Feb 2021 01:10 PM PST

    The download links at https://developer.android.com/studio#command-tools are not responding for me. Does anyone have the full URL for commandlinetools-linux-6858069_latest.zip?

    submitted by /u/precocityAndroid
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    Windows File Explorer - ADB Context Menu

    Posted: 08 Feb 2021 01:32 PM PST

    Greetings Programs.

    I'm relatively new to Android/AS development, and wondering if anybody knows of any ADB tools/plugins that can be integrated into the Windows File Explorer via its right-click context menus.

    I use Android Studio for running code on my device, but when I come to generate a release apk, I've been using the command-line to install it (adb install -r -d <filename.apk>). Not the end of the world to type it of course, but wondering if there are any Windows File Explorer options, so that I can right-click on a generated release apk and install it?

    Or am I missing some way of doing this with the generated release apk from within Android Studio?

    Many thanks.

    submitted by /u/TooOldToCareIsTaken
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