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    Android-DEV roadmap Android Dev

    September 02, 2018

    Android-DEV roadmap Android Dev

    Android-DEV roadmap

    Posted: 02 Sep 2018 02:46 AM PDT

    Hi! I saw many of roadmaps for all kind of developers, but I've never saw something similar for android-developers, does something exist for us? Cause there is for ios-developers if somebody has it, than share please it with me, I would be grateful

    submitted by /u/FepeProg
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    Best Practices For Mobile Form Design

    Posted: 02 Sep 2018 01:43 PM PDT

    Working on a Halloween Project? I have 30 free to use Silent Hill inspired ambient and ominous horror tracks for you!

    Posted: 02 Sep 2018 11:54 AM PDT

    Introduction

    I'm a massive fan of anything creepy and all things horror, and I've been working on some instrumental horror music and ambiences, which I'm giving away here to use for whatever purpose you see fit :)

    Link to all 30 tracks in one video on youtube: https://www.youtube.com/watch?v=yNExRHVRy6w

    ​

    Wave files of all 30 tracks availble at:https://1drv.ms/u/s!AtxCDoMGd8TagXYdR4na0xfkF8LL

    Any questions or requests etc don't hesitate to ask!

    Please consider subscribing on Youtube to be updated with my work as I'm currently working on a sequel to this project!

    ​

    INFO ON WORK:

    Heavily inspired by Silent Hill amongst other horror franchises. All instrumental various types of creepy ominous thriller etc style music. Styles covered here include dark ominous music, ambient synth based relaxing but slightly creepy, ranging to out right brutal horror soundscapes. Other influences here include the sound tracks for Halloween, Stranger Things, SAW, Resident Evil, Game of Thrones, Vertigo, Cape Fear, Forbidden Siren... Loads more, I could probably go on for days. Musically inspired specifically by the amazing music of Akira Yamaoka... A style that is impossible to imitate, and would be an insult to try! but it's the spirit of Yamaoka's music and the atmosphere that I have to capture here more than anything! I'm a massive fan of all horror and creepy things, and this is a compilation of "creepy" music that I've made over the course of learning to make music... anything else I produce going forward is likely to be a lot better, but theres still a lot I love about this music I've created and maybe someone out there will get a kick out of it!​

    LICENSE INFO:

    Attribution CC BY Scott ARC

    This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials.

    https://creativecommons.org/licenses/by/2.0/

    submitted by /u/scottarc
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    Why use SingleLiveEvent LiveData at all?

    Posted: 02 Sep 2018 06:38 AM PDT

    I see in a google sample code, we have a special class SingleLiveEvent (extends MutableLiveData) to handle a case where a view can undesirably receive the same event on configuration change (like rotation)

    This class seems useful when there is a requirement to show a dialog only once on some event broadcast. With the LiveData, the same event will be received again by the view (activity or fragment) on device rotation, causing the dialog to reappear even when explicitly dismissed.

    But there is a catch with SingleLiveEvent. You can only have one observer. If you add another, you can never know which observer is notified. SingleLiveEvent is a half-baked idea. Now imagine incorporating it with error handling observable LiveData.

    LiveData simply follows a observer pattern and I don't think the above mentioned use case is worthy enough to have its own variation of the observable class. So how do we solve the dialog problem?

    Rather than changing the behavior of LiveData, we should just stick with the fundamentals of MVVM pattern and if there is a need, we should rather have View notify the ViewModel about the dismissed dialog. VM can reset or change the state of the event after that.

    I know, it's easy to forget to notify ViewModel and we are increasing the responsibility of the View. But after all, that's the job of the View: to notify VM of any user action.

    Thoughts?

    submitted by /u/binary-baba
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    How can we check that an android app is performing its HTTP traffic using TLS/SSL

    Posted: 02 Sep 2018 01:11 PM PDT

    Typically, when I'm on a web browser on a desktop, I can check that the site is using TLS/SSL by visually inspecting the "https" protocol in the URL and can click the icon, depending on the browser, and checking out the certificate.

    I haven't used banking and credit card apps in the past few years because I was unsure of how I'd verify the same on Android apps - so how can I verify an app is using SSL for its requests?

    submitted by /u/Alinon
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    I built a library to handle double click on Android

    Posted: 02 Sep 2018 03:52 PM PDT

    Android Studio: MVVM + Single source of truth Pattern

    Posted: 02 Sep 2018 03:42 PM PDT

    Strange issue with 'installs by user' stat on play console

    Posted: 01 Sep 2018 11:22 PM PDT

    Context : So I have two apps on play store and both are relatively young. Slowly they started getting downloads and for last 2-3 weeks I'm noticing this strange issue. In my both apps, installs by user number goes down automatically after 2-3 days. E.g On Aug 29th, One of my app had 112 downloads. (This number play console showed me once after processing all the data midnight that day as they claim). It stays 112 for 3 days. Now when I checked again today, for the same day it shows me 104. This has been happening to me since last few weeks and every time I check data, some previous day is affected (Usually it's 3rd or 4th day before the current day). This also reflects in my total number of downloads. Every time I refresh my total number of downloads screen, It goes down by 10-15.

    I've also got screenshots.
    29th August (Before)
    29th August (Now)

    Have you guys experienced this before? Is it normal? First time I contacted play console guys and they gave me one of their template answers. Second time they asked for screen shots, I provided them but no reply since 3 days now.

    ​

    submitted by /u/Apsaliya
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    Beginner Issues - Barebone app for FCM

    Posted: 02 Sep 2018 02:54 AM PDT

    New to android but with coding experience otherwise.

    For a prototype involving IBM Bluemix, I'm trying to create a simple app that will receive and show the notifications.

    ​

    Steps I followed

    1- Cloned app template from https://github.com/firebase/quickstart-android/tree/master/messaging

    --a-- The sample app has required Firebase settings in gradle and manifest files

    2- Setup Firebase service

    --a-- Downloaded Json file and placed in app folder

    3- Setup up AVD - Pixel with Android 7

    --a-- Build Successful, Sync Successful, Deployed to AVD

    5- Pushed a notification via the Firebase service

    --a-- It does not show up in the app

    --b-- I had setup a prototype web app in IBM BLuemix which is able to receive these push notifications

    6- I thought of trying makeroid.io, but they are tied up with onesignal for configuration, which I cannot use.

    7- Somewhere I read that possibly due to missing Google play services, emulators may not be able to receive the notifications. I did try to export the app to my OP3 but with no success.

    ​

    I fail to understand what I'm missing in setting up the sample code. Looking for some help on what might be the issue .

    Alternatively, if there is any demo/sample app which I can use to jump start will be of great help.

    ​

    Edit1 : Grammar + pt 7

    submitted by /u/lifemoments
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    Constraint layout attribute disappeared for me. What to do?

    Posted: 02 Sep 2018 04:48 AM PDT

    Here is an image of the problem:

    https://imgur.com/a/xhI06mv

    In one project I have this constraint menu attribute. In the other i don't, and I don't know how to enable it again.

    submitted by /u/BigBootyBear
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    First attempt at MVP. Looking for feedback.

    Posted: 02 Sep 2018 08:52 AM PDT

    Hey everyone.

    I've built an app (fairly simple in functionality) in order to try and attempt to incorporate MVP architecture. This is my first attempt at the same.

    Would really appreciate some feedback with regards to both MVP as well as my code.

    Here's the repo - https://github.com/GauravR31/Notes

    submitted by /u/GauravR31
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    External Sources through ADB

    Posted: 02 Sep 2018 08:15 AM PDT

    Hello People 👋

    Im testing my app on an Android Smart TV, and I was wondering... there is a way to actually display the external sources of the tv (HDMI 1-2-3 Etc...) via ADB? Or it's impossibile completely?

    At the moment as soon as I select the input source the view stays completely black and I can't control the OS anymore until I physically go, get the remote and go back to the "Android TV menu"

    submitted by /u/crospa91
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    How to process video files frame-by-frame?

    Posted: 02 Sep 2018 08:10 AM PDT

    If I want to read a frame from a video file, adjust the frame, and write the frame to a new video file, where is the documentation on how to do that? Basically, I want to decompress a video frame in to an RGB buffer where I can access pixels with X/Y coordinates, and write out a modified video file with the same height/width/etc. Does Android have a preferred way of doing this, or do you have to pull in some 3rd party library like OpenCV for Android?

    submitted by /u/who1234567890
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    Looking for an app to build

    Posted: 02 Sep 2018 07:59 AM PDT

    anyone got a good app to build to show in interview and just something hard enough and not impassable and tedious to build alone like a multiplayer game...

    im eager to learn, practice and grow but i just cant find the right idea....

    ​

    was thinking about a simple chat application using firebase and AppWarp.

    what do you think?

    submitted by /u/michaelkatan
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    How to update all visible fragments at the same time?

    Posted: 01 Sep 2018 08:32 PM PDT

    Hello everyone! I hope the title makes sense lol. I need help with this problem I've been struggling with for the past two weeks, working on and off, after school and work.

    I have twelve fragments in a ViewPager. All together they represent a year. I'm using the observable pattern.

    Now I'm using the observable pattern to update my 12 `UpcomingGamesFragment` fragments

    ​

    Here's my `UpcomingGamesFragment` class with the method I call to update the fragment's data.

    ​

     public class UpcomingGamesFragment extends Fragment implements Observer { public void loadReleaseData(final int refresh) { if (mDatabaseLoading == null) { Log.d(TAG, "Fragment filter " + mFilter + " [fragment is null]"); return; } else { Log.d(TAG, "Updating fragment: " + mFilter); } if (AppUtil.doesInternetWork(getActivity())) { // Viewpager does not load all fragments in memory, contents will be null mDatabaseLoading.setVisibility(View.VISIBLE); mUpcomingList.setVisibility(View.VISIBLE); mEmptyTextInfo.setVisibility(View.GONE); noInternetTxt.setVisibility(View.GONE); mUpcomingPageLayout.setClickable(false); Query query = mDatabaseRef.child("releases") .child(mRegion) .child("data") .orderByChild("m_y") .equalTo(mFilter); if (mFilter.equals("future")) { // Get all future releases Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.MONTH, Calendar.getInstance().get(Calendar.MONTH)); calendar.set(Calendar.YEAR, Calendar.getInstance().get(Calendar.YEAR) + 1); query = mDatabaseRef.child("releases") .child(mRegion) .child("data") .orderByChild("date") .startAt(calendar.getTimeInMillis()); } query.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { if (dataSnapshot.hasChildren()) { if (refresh == 1) { // Toast.makeText(getContext(), "adasfsdz", Toast.LENGTH_SHORT).show(); resetList(); Toast.makeText(getContext(), "Refreshing list...", Toast.LENGTH_SHORT).show(); } for (DataSnapshot data : dataSnapshot.getChildren()) { _Release release = data.getValue(_Release.class); if (release != null) { if (mSelectedPlatforms.isEmpty()) { // No platform filter set add all releases! if (release.getGame() != null) { mUpcomingReleases.add(release); } } else { if (release.getGame() != null) { // If current platform is in ours shared pref of platforms if (!Collections.disjoint(release.getPlatform(), mSelectedPlatforms)) { mUpcomingReleases.add(release); } } } } mUpcomingGamesAdapter.notifyDataSetChanged(); } // Check if list empty, if it is no releases matching platforms filter if (mUpcomingReleases.isEmpty()) { mEmptyTextInfo.setText("No releases found matching your platforms"); mEmptyTextInfo.setVisibility(View.VISIBLE); } } else { mEmptyTextInfo.setText("No releases found for this month"); mEmptyTextInfo.setVisibility(View.VISIBLE); } mDatabaseLoading.setVisibility(View.GONE); } @Override public void onCancelled(DatabaseError databaseError) { mDatabaseLoading.setVisibility(View.GONE); } }); } } @Override public void update() { loadReleaseData(0); } }

    And I have another fragment `UpcomingViewPagerFragment` that contains the `viewpager` which contains the 12 `UpcomingGamesFragment` fragments, this fragment is the observable, here it is:

     public class UpcomingViewPagerFragment extends Fragment implements Observable { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_upcoming_view_pager, container, false); // Viewpager mViewPager = view.findViewById(R.id.pager); mViewPager.setOffscreenPageLimit(3); // Get TabLayout from Main TabLayout tabLayout = ((MainActivity)getActivity()).mTabLayout; tabLayout.setupWithViewPager(mViewPager); mSectionsPagerAdapter = new SectionsPagerAdapter(getActivity().getSupportFragmentManager()); Calendar calendar = Calendar.getInstance(); SimpleDateFormat monthFormatter = new SimpleDateFormat("MMMM"); // Add 11 months [Maximum] to show the releases for the next year [14 fragments in total] // First page recently released [-1] gets the last month of the current month calendar.add(Calendar.MONTH, -1); for (int i = 0; i < 14; i++) { String title = monthFormatter.format(calendar.getTime()) + " " + calendar.get(Calendar.YEAR); String queryId = (calendar.get(Calendar.MONTH) + 1) + "_" + calendar.get(Calendar.YEAR); if (i == 13) { // the last one queryId = "future"; title = "Near future"; } UpcomingGamesFragment upcomingGamesFragment = new UpcomingGamesFragment(); mSectionsPagerAdapter.addFragment(upcomingGamesFragment, title, queryId); calendar.add(Calendar.MONTH, 1); // Log.d(TAG, "Added fragment: " + title + " : " + queryId); // Adding observers this.addObserver(upcomingGamesFragment); } mViewPager.setAdapter(mSectionsPagerAdapter); // Because the first page will always be the recently released mViewPager.setCurrentItem(1, true); return view; } @Override public void addObserver(Observer o) { mObserversList.add(o); } @Override public void deleteObserver(Observer o) { mObserversList.remove(o); } @Override public void notifyObservers() { for (Observer observer: mObserversList) { observer.update(); } } }

    Some code was omitted for clarity, like both fragment's default constructor

    ​

    And when I call the method to update all 12 fragments `notifyObervers()` in my `MainActivity` I always get that the component `mDatabaseLoading` is `null` (please see the `loadReleasData()` method) and so the visible fragments don't get updated, any idea why the components are always `null`?

    submitted by /u/luckyfart
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    Android app dev internship?

    Posted: 02 Sep 2018 05:45 AM PDT

    Good day all!

    I've been trying to get my foot in the door, but not very proactively. I'm out of practice for a long while now, and had been doing the Udacity's beginner's course, which I'm trying to force myself to get back on.

    However, I'm unemployed and have a couple interviews lined up at small start-ups. I've already had an opportunity squandered, so don't to waste one anymore.

    One of those startups have arranged for the interview tomorrow, and specifically expect to at least know this: https://www.javatpoint.com/java-tutorial

    https://www.javatpoint.com/android-tutorial

    Now my question is, is it a good idea to go for internship when I can already apply for full time roles? (which I prefer less ATM because of the clumsy recruiting process when compared to intern recruitment). Is it the right time to apply? Should I just go to the interviews to know what kind of questions they ask, instead of focusing that time to complete the Udacity course? What do you expect an intern to know about Android for him to be able to add value to whatever goal the company / team is trying to achieve? How much is enough to begin?

    PS: this is an alt account, and my location is Mumbai.

    submitted by /u/androidBaahubali
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    A Rotary Dialer Loading for Android

    Posted: 02 Sep 2018 05:34 AM PDT

    Is there a tool to calculate how percentage of the day is past?

    Posted: 02 Sep 2018 11:46 AM PDT

    Do you think it's a good idea to use fragments for popup windows? I normally see people creating an entire other activity to use as a popup window instead, but wouldn't just using fragments be better?

    Posted: 01 Sep 2018 06:53 PM PDT

    Any advice is appreciated.

    submitted by /u/thatisit_
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    Battery usage of Location Services

    Posted: 02 Sep 2018 12:51 AM PDT

    Hello,

    are there any statistics how much percentage of battery usage are gone when Location Services are always on using high accuracy but optimized (wifi...)? I mean in normal conditions. Always enabled by the Android system, but GPS is only accessed a few times the day, let's say 5 times, because we took a photo. Maybe 5% of the entire battery capacity per day? Or only 10 minutes? I can't find anything on Google.

    submitted by /u/denny_weinberg
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    Need help with android file system and ADB

    Posted: 02 Sep 2018 12:50 AM PDT

    Because of stupid limitations on APK and OBB size I have to manually put my asset bundle on devices.

    This is where I faced the problem. First, what the absolute path even looks like on Android? No SD card, just internal storage.

    Second - how to upload files files on my android device? I am working with Oculus GO and simply copying my asset bundle through file explorer does not work apparently (the progress bar never moves).

    I tried using ADB, but it gives me some crap about 'remote secure_mkdirs failed: No such file or directory' for Android/data/com.company.app/files/ and 'remote couldn't create file: Read-only file system' for just android

    What am I doing wrong here?

    submitted by /u/Barsik_The_CaT
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    Add Google Fit integration to my app

    Posted: 01 Sep 2018 05:40 PM PDT

    Hi, I recently made a running app to store informations about my running session. After a run I would like to add the informations (such as duration and distance) to the Google Fit app to keep trace of it. Is there any good guide on how to add an activity to Google Fit?

    submitted by /u/zrock562
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