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    Wednesday, February 5, 2020

    Home Unlabelled Android Dev - X-post: Google has paid Android developers about half of what Apple has - r/apple

    Android Dev - X-post: Google has paid Android developers about half of what Apple has - r/apple

    February 05, 2020

    Android Dev - X-post: Google has paid Android developers about half of what Apple has - r/apple

    X-post: Google has paid Android developers about half of what Apple has - r/apple

    Posted: 04 Feb 2020 11:41 PM PST

    How to become a better android programmer?

    Posted: 05 Feb 2020 07:25 AM PST

    Hi all,

    I'm a junior android developer and I want to improve. I would like to know, which in your opinion are the best libraries,frameworks,design patterns, etc... to focus on.

    For example I've read about Dagger and Retrofit (I'm using Volley) and about MVVM, even RxAndroid seems cool. I want to start to implement unit tests and I'm also learning Kotlin.

    There are a lot of things, but which are the things that are worth to learn for real?

    submitted by /u/TheScanf
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    Android Styling: Themes vs Styles

    Posted: 04 Feb 2020 01:56 PM PST

    The Iowa Fracases: Voting Apps Need Better Testing & Monitoring

    Posted: 05 Feb 2020 07:31 AM PST

    Activity onCreate not called until screen is unlocked?

    Posted: 05 Feb 2020 04:11 AM PST

    I have a Service running in my app that starts an activity whenever a condition is met, however if this condition is met when the screen is locked, the onCreate callback doesn't fire until I unlock the device.

    I have added the following to the activity in my manifest

    android:showOnLockScreen="true"
    android:turnScreenOn="true"

    I've also tried adding the relevant flags to the Window of the activity in onCreate, however since onCreate never fires while the device is locked this doesn't make a difference.

    How can I get the activity's onCreate to fire when the screen is locked and in turn, turn the screen on and show over the lock screen of my phone?

    submitted by /u/d0zza
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    Wait for retrofit response before passing data to RecycleView adapter

    Posted: 05 Feb 2020 06:35 AM PST

    I have 2 retrofit calls: one gets a list of ints and based of those ints I make another series of calls in a loop - HackerNews API.

    How to wait for retrofit to finish or is there another solution?Something like loading the data as it comes in maybe?

    MainActivity

    public class MainActivity extends AppCompatActivity { private RecyclerView mRecyclerView; private RecyclerView.Adapter mAdapter; private RecyclerView.LayoutManager mLayoutManager; private List<DataResponse> dataResponses = new ArrayList<>(); private Observable<List<Integer>> ids; private List<Observable<DataResponse>> requests = new ArrayList<>(); @SuppressLint("CheckResult") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor(); interceptor.setLevel(HttpLoggingInterceptor.Level.BODY); OkHttpClient client = new OkHttpClient.Builder() .addInterceptor(interceptor) .build(); Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://hacker-news.firebaseio.com/v0/") .addConverterFactory(GsonConverterFactory.create()) .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .client(client) .build(); HackerNewsApi hackerNewsApi = retrofit.create(HackerNewsApi.class); Call<List<Integer>> idlist = hackerNewsApi.getPosts(); idlist.enqueue(new Callback<List<Integer>>() { @Override public void onResponse(Call<List<Integer>> call, Response<List<Integer>> response) { // Log.e("onSubscribe", "YOUR DATA IS HERE: " + response.body()); for (Integer i=0;i<10;i++){ Call<DataResponse> story = hackerNewsApi.getStory(response.body().get(i)); story.enqueue(new Callback<DataResponse>() { @Override public void onResponse(Call<DataResponse> call, Response<DataResponse> st) { // Log.e("onSubscribe", "STORY IS HERE: " + st.body().getTitle()); if(st.isSuccessful()) { dataResponses.add(st.body()); } } @Override public void onFailure(Call<DataResponse> call, Throwable t) { t.getMessage(); } }); } mRecyclerView = findViewById(R.id.recyclerView); mRecyclerView.setHasFixedSize(true); mLayoutManager = new LinearLayoutManager(getApplicationContext()); Log.e("onSubscribe", "YOUR DATA IS HERE: " + dataResponses); mAdapter = new ExampleAdapter(dataResponses); mRecyclerView.setLayoutManager(mLayoutManager); mRecyclerView.setAdapter(mAdapter); } @Override public void onFailure(Call<List<Integer>> call, Throwable t) { t.getMessage(); } }); } }

    Retrofit Class

    public interface HackerNewsApi { @GET("topstories.json?print=pretty") Call<List<Integer>> getPosts(); @GET("item/{id}.json?print=pretty") Call<DataResponse> getStory(@Path("id") Integer id); }
    submitted by /u/epoxxy
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    Do I need to use third party Recycler View library?

    Posted: 04 Feb 2020 10:01 PM PST

    If I do what are your recommendations?

    Thanks in advance!

    submitted by /u/LoneWalker20
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    Bench marking an App?

    Posted: 05 Feb 2020 08:22 AM PST

    Issue:

    I have a developer who insists on using Progaurd. I'd like to test our app both without Progaurd, and with to see the performance differences.

    Options I've found while googling are very sketchy, does anyone have any suggestions from experience?

    details:

    The problem is we get issues which only occur in production and when the test user sends us a stacktrace, it is obfuscated. We cannot recreate the issues in dev/locally, so the stack trace is important. I'd like to see if progaurd is really worth it in terms of performance

    Edit:

    fekete777 pointed out I can return the stacktrace into a usable form (see manual), however I'd still like to test to see progaurds performance gain, for my own curiousity

    submitted by /u/dusty-trash
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    Violation of Impersonation policy, looking for advice

    Posted: 05 Feb 2020 01:29 AM PST

    Today I got my app removed because it contains a copyrighted word in the name. The email explains that I should rename it to something like [app name] for [copyrighted word] and that's what I'm going to do. However, I have some concerns about the package name. It looks like this: com.[my name].[copyrightedword][app name]. Is it safe to keep it the same or should I change it as well just in case and submit a new app?

    submitted by /u/koczmen
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    Gesture listener for toddlers?

    Posted: 05 Feb 2020 06:53 AM PST

    As an Android dev with a 2 year old daughter, I've noticed that most Android apps are really difficult for my 2 year old to operate. Even the toddler game apps. The thing is, when I watch her try to drag the puzzle piece or touch the cat icon, it looks like she's doing it correctly almost every time. But her 90% gesture precision results in 30% gesture recognition.

    Is anyone aware of a library or project that provides "sloppy" touch recognition? I would imagine this could also be useful for accessibility purposes, for users who lack 100% muscle control.

    submitted by /u/mattrob33
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    Alter type with typealias

    Posted: 05 Feb 2020 06:38 AM PST

    Streaming data from a home cinema device using RXJava on Android

    Posted: 05 Feb 2020 02:42 AM PST

    Permission question: Manifest.permission.READ_PHONE_STATE

    Posted: 05 Feb 2020 06:02 AM PST

    Hi Guys,

    Newbie here again, I came across this permission that apparently the company I am working with requires to perform and analyze the transaction from customer. I have read many different opinions about it, but can any of you please tell me what kind of data / information does this permission request from the user?

    Thanks, a couple of virtual beers for you all =).

    J.

    submitted by /u/James_Iha
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    Will Android 11 kill legacy apps?

    Posted: 04 Feb 2020 12:31 PM PST

    My concern is regarding the storage issue. As far as I know, even apps targeting older API level and using File based methods for storing data on internal storage will also not work.

    So, seeing the total number of applications that still use this technique to store data, does in mean that Android 11 will render many apps useless? Will there be any backlash from the users?

    submitted by /u/SayantanRC
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    The path to DX deprecation

    Posted: 04 Feb 2020 09:53 AM PST

    How to Maintain Your Brand Identity with a Product

    Posted: 04 Feb 2020 11:13 PM PST

    Anyone else experiencing users unable to install apps from Google Play Store?

    Posted: 04 Feb 2020 04:18 PM PST

    Hey there - I was contacted by one of my users a while back that they were unable to install the app. I actually met up with them and they showed me how they tried to install it - the app would download but when the system tried to install it, they got a popup message saying:

    Can't install [appname]

    Try again, and if it still doesn't work, see common ways to fix the problem

    Send Feedback | Ok

    The user is using a Pixel 2 running Android 10 - and I have other users on the same device and OS version, so this isn't some compatibility problem. And my app itself has no restrictions on which devices can or can't install it. Additionally this is all based in North America so I think localization shouldn't be an issue.

    I tried to get the user to clear the cache for Google Play among other things but to no avail After some google-fu I found this post from the Google Support forums. Seems like others are also experiencing it.

    Have any of you experienced this problem with your users? Any steps or help to fix it? For what it's worth the only thing I can think about is because I have an Open Beta Track in Google Play.

    submitted by /u/SoJexy
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    Can anyone eli5 this Intent constructor?

    Posted: 04 Feb 2020 02:51 PM PST

    Hi new to Kotlin + android development.

    Just started doing a basic tutorial and playing around with android dev.

    I have two activities one main and another second activity. I want to pass some information from main to secondary.

    As far as I understand it, intents are pretty much that as in I intend to do this so it is an action to be performed, much like in the English language.

    Anyway part of the code in mainactivity says:

    val intent: Intent = Intent(this, SecondActivity::class.java)

    startactivity(intent)

    So I am declaring an immutable object of type Intent and I am passing two arguments to the constructor, the first basically says that the intent is from this current activity where the code is written (in this case mainactivity) and the other activity we are starting is the second activity. We then use the function startactivity to move us over to the second activity (i.e. to change the page on the app, and then we can use the onCreate method of that activity to do what we want, which is just to copy some information in this case).

    My question is this:

    1. Can anyone explain if I am roughly correct in what I am saying.

    2. Can anyone explain (in simple terms if possible) why the second parameter is "SecondActivity::class.java". I have never seen this :: notation before and I don't understand why I can't just write SecondActivity?

    ​

    Thank you!

    submitted by /u/ikihsin2
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    Unable to use adb no permission oppo

    Posted: 04 Feb 2020 05:38 PM PST

    Usb debug and dev mode working but still adb device cant get access. Output shows device no permission

    submitted by /u/Theguy3653
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    Bottom NavigationView Inside Fragment With ChildFragmentManager Creates Overlap View

    Posted: 04 Feb 2020 03:30 PM PST

    I'm trying to show Material Bottom Navigation Inside Fragment. My Bottom Navigation View has three fragments inside it. I solve the problem when the Fragment creates a new instance every time when we select the Navigation item. But the real problem occurs when I navigate to another fragment from my Navigation Drawer. Here's how my Bottom Navigation structure looks like.

    Main Fragment (All the following items are the bottom navigation view items inside Main Fragment).

    1. Home Fragment
    2. Notification Fragment
    3. Search Fragment
      Here's how I'm adding, showing, and removing fragment with Fragment Manager. It is an extension function.

    ​

    fun FragmentManager.hideAndShowFragment( newFragment: Fragment, containerId: Int, hideFragmentInstance: Fragment? = null ) { beginTransaction().apply { if (hideFragmentInstance == null) { add(containerId, newFragment) commit() return } if (fragments.contains(hideFragmentInstance)) hide(hideFragmentInstance) if (fragments.contains(newFragment)) show(newFragment) else add(containerId, newFragment) commit() } }

    In the above code, the first condition is for when there is no fragment showing and don't need to hide the previous fragment. And then if the FragmentManager List<Fragment>
    contains the previous fragment first hide, then show the new fragment accordingly.

    And this how I'm calling this extension function.

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?) : View { ///// other stuff bottomNav.setOnNavigationItemSelectedListener { menuItem -> val previousFragment = getCurrentShowingFragment(currentId) val newFragment = getNewFragment(menuItem.itemId) childFragmentManager.hideAndShowFragment(newFragment, CONTAINER_ID, previousFragment) currentId = menuItem.itemId } // First time childFragmentManager.hideAndShowFragment(getNewFragment(currentId), CONTAINER_ID, null) }

    Now when I try to navigate to another fragment with Navigation Drawer and came back by pressing back button the current showing fragment view sticks to the screen even I try to click on other bottom nav items it just never disappears.

    Here is the video demonstration.

    Thanks for your time.

    submitted by /u/programming-nerd
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