Android Navigation Component View.SYSTEM_UI_FLAG_VISIBLE adds blank whitespace between statusbar and actionbar View.SYSTEM_UI_FLAG_VISIBLE adds additional whitespace to UI. I tried to add View.SYSTEM_UI_FLAG_LAYOUT_STABLE flag but additional transparent gap still exist between actionbar and statusbar. How i can return to statusbar visible mode from fullscreeen mode programmatically? First fragment screenshot: Second fragment screenshot: ...

Filter null keys and values from map in Kotlin I have an extension function that filters away entries with null keys or values: fun Map.filterNotNull(): Map = this.mapNotNull { it.key?.let { key -> it.value?.let { value -> key to value } } }.toMap() This works for a map with nullable keys and values: assert(mapOf(null to "x", "y" to null, "a" to "b").filterNotNull() == mapOf("a" to "b")) But not in one that has non-nullable keys or values: assert(mapOf("x" to null, "a" to "b").filterNotNull() ==...

String request in Kotlin class I m new in Kotlin and I'm trying to do a string request (with volley library and PHP) I did this (like a Java) val addUrl = "myurl" val queue = Volley.newRequestQueue(this) val postRequest = object : StringRequest(Request.Method.POST, addUrl, Response.Listener { response -> //Toast.makeText(this, response, Toast.LENGTH_SHORT).show() }, Response.ErrorListener { //Toast.makeText(this, "Something wrong", Toast.LENGTH_SHORT).show() }) {...

is there a way to change the textview text in the MainActivity whenever the text in recyclerview row changed in Kotlin I an trying to do a simple app, in which I use RecyclerView. Here are my files. MainActivity.kt activity_main.xml --> which has RecyclerView (recylerViewMain) single_row.xml --> single row for recyclerViewMain MainAdapter.kt --> where all bindings , ViewHolder and inflating I have also Product.kt --> model for Products Now, here what i am trying to do. I have added Plus and Minus buttons on the side of itemUnit and whenever i click those items it does the job i wanted, increasing...

How to serve https requests in Ktor programatically To serve https requests in Ktor, their documentation states you need to set some config properties (ktor.security.ssl) in application.conf, such that Ktor can find the ssl certificate. However, I want to retrieve the ssl certificate from another server (via an encrypted connection). Can I setup my Ktor server in such a way that I retrieve this certificate and enable https on server startup?

How to parse json array with multiple nested objects Err0r i get is Expected Begin_Object was Begin_array i have looked at other questions but they do solve my problem. can anyone please show me how I can parse a JSON nested object so that I can access the values of each? ...i get he below error Err0r i get is Expected Begin_Object was Begin_array Here is my json data class Blog ( @Json(name="number") val id_no: String="", @Json(name="area_number") val facility_ref_no: String = "", @Json(name="slot_number") val slot_ref_no: String? = "",...

Android kotlin : mutable live data change not reflecting/updating the layout using data binding in xml I have created sample project to use the Android data binding with xml layout. Also used MVVM with mutable live data. Screen Layout has a switch widget and linear layout in same layout. I am just trying to hide/show the linearlayout on state change of switch widget. Everything is coded as per concept. Also it is working properly with default value for switch widget(checked = true/false) if assign in viewmodel. but its not working at runtime. Expected Result : On state change of switch....

Graphql Tools: Map entity type to graphql type Im using graphql java tools in my spring application. I have an entity like this: @Entity data class Image( @Id @GeneratedValue(strategy = GenerationType.SEQUENCE) @Column(nullable = false) val id: Long = 0 ) { @Lob @Column(nullable = false) var image: Blob? = null } And in the GraphQL schema I want to have a different type: type Image { id: ID! image: String! } Starting this wont work, ofcourse, because of a schema parsing...

Room freeze when use coroutine flow->collect I'm using Room (v. 2.2.1) with coroutines support (v. 1.3.2) and following setup @Entity(tableName = "simple_table") data class SimpleEntity( @PrimaryKey(autoGenerate = true) val id: Long = 0 ) @Dao interface SimpleDao { @Query("SELECT * FROM simple_table WHERE id = :id") fun getContact(id: Long): Flow @Insert suspend fun insert(entity: SimpleEntity) } Then after I inserted data into simple_table with autogenerated id 1 I trying to query...

Android BottomNavigationView Icon and text label overlap each other in Emulator tablet I have created layout with help of sdp Library and ssp Library, When testing in Nexus 10 API 24 emulator, BottomNavigationView show icon and text label which overlap each other. It work fine with mobile screen. BottomNavigationView : android.support.design.widget.BottomNavigationView, Bottom navigation height : @dimen/_43sdp equivalent to 56dp in...

Activity not passing intent to onActivityResult() This is the Kotlin main activity, which is having problems receiving data from the second activity (posted after this) class MainActivity : AppCompatActivity() { private val LOG_TAG = MainActivity::class.java.simpleName val EXTRA_MESSAGE = "com.example.android.twoactivities.extra.MESSAGE" val TEXT_REQUEST = 1 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } fun launchSecondActivity(view: View)...

Android Studio 3.5 indexing issues with instant libs Error Log: com.intellij.util.IncorrectOperationException: Incorrect package name: null at com.intellij.psi.impl.PsiElementFactoryImpl.createPackageStatement(PsiElementFactoryImpl.java:449) at com.intellij.psi.impl.source.PsiJavaFileBaseImpl.setPackageName(PsiJavaFileBaseImpl.java:125) at com.android.tools.idea.databinding.psiclass.LightBrClass.(LightBrClass.kt:111) at...

I want to crawl this part using jsoup I want to crawl "엘지 V40 ThinQ" and "1,049,400" using jsoup. Please help me to solve this problem. I used select() like this val nameParse01: Elements = doc.select("div.l-grid").select(".disclosure-list-area").select(".disclosure-list>tbody") but I couldn't got data what I want This is the code of the site I am trying to. 공시지원금...

Simple unit test for Apache Camel SNMP route I'm having some trouble getting a working Camel Spring-Boot unit test written, that tests a simple SNMP route. Here is what I have so far: SnmpRoute.kt open class SnmpRoute(private val snmpProperties: SnmpProperties, private val repository: IPduEventRepository) : RouteBuilder() { @Throws(Exception::class) override fun configure() { logger.debug("Initialising with properties [{}]", snmpProperties) from("snmp0.0.0.01161?protocol=udp&type=TRAP")...

Moshi crashing at float values I have this model class data class RvRange(val low: Int?, val high: Int?) My JSON response is {"low":60799.999999999985,"high":168800.00000000003} I want Moshi to automatically convert those float/Double values to Int but it crashes. is there any solution to this problem?

How to implement Navigation Drawer in my activity? I am writing a simple coupon application, but I am struggling to implement a navigation drawer in my activity. I have a toolbar with a tabbed navigation. I'd like to have a "hamburger" style button in my toolbar which will allow me to open my navigation drawer. I have no clue how to implement this. I'd be extremely happy if someone helped me! Photo of my layout in Android Studio:

Kotlin EMV android.nfc.Tag.setConnectedTechnology Error So I have to do a presentation on EMV technology in computer science my graduation year in high school. I want to give the class a real life aplication of this technology, because I have a bit of expierience in programming. I used the EMV Libary from devnied on GitHub. I got this Error from my code, I tried to look it up online but didn't really find something. I would be so thankful if somebody could help me. Error: 2019-11-12 192255.450 8543-8556/com.example.projectz W/System.err:...

java.lang.RuntimeException: Cannot create an instance of class yodgorbek.komilov.musobaqayangiliklari.viewmodel.MainViewModel I am developing news and I have implemented viewmodel in fragment class but I run the code I am getting the following exception from fragment class java.lang.RuntimeException: Cannot create an instance of class yodgorbek.komilov.musobaqayangiliklari.viewmodel.MainViewModel at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.java:184) at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.java:241)...

android cameraX API brightness issue I'm using CameraX Api in my app and I'm faced with a problem with "Auto-Brightness Adjustment". Actually, In some devices, it works well but in others, camera preview is very dark compared to the original camera. Here somebody had the same issue but with Camera2 API. It is worth mention that when I tested <a href="https://github.com/android/camera-samples" rel="nofollow noreferrer">google camera...

Blank screen with RecyclerView No adapter attached I'm tying to parse JSON in recyclerview. App compiles fine but it's outputting empty/blank screen BlogAdapter.kt class BlogAdapter(private val blogList: List) : RecyclerView.Adapter() { override fun getItemCount()= blogList.size private var mContext: Context? = null override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder { this.mContext=parent.context; return ViewHolder( LayoutInflater.from(parent.context).inflate(...

How to show dialog like Google maps shows to enable GPS Hello everyone, Im struggling with Google Maps API, I want to show the same dialog that google maps shows when you click current location button.

How can I have multiple TextViews inside a RecyclerView list item I know that RecyclerView lists are flexible and that it's possible to have multiple views in each item. I can't find any good example code that will help me implement this. I am trying to implement a simple RecyclerView list with each list item as a custom .xml layout that I have created. What must be done in for the RecyclerView.Adapter to be able to access each different view by its ID from the custom layout file and be able to update each value? I've basically copied the following code...

How to serialize Flux style actions with nested payload with Jackson? I'm trying to set up custom serialization with jackson for "Flux Standard Actions". An example JSON: { type: 'ADD_TODO', payload: { text: 'Do something.' } } I've tried by declaring an interface with @JsonSubTypes: @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type") @JsonSubTypes( JsonSubTypes.Type(value = AddTodoAction::class) ) interface Action...

When my InputFilter source comes in as spannable, the source does not remove the characters I filter out I am filtering most characters and numbers out in this use case. When I type several 'filtered' characters, let's say 555, the source of each following filter event still has those 5's in it, even though they have been filtered out. This means that after typing 555, and having nothing appear in the EditText, I have to backspace 3 times before I actually start backspacing what is in the EditText. Not only that, but my 'invalid input' toast fires on every backspace, because my source still has...

Problem searching sqlite database in kotlin First of all i'm nobbie in Kotlin, trying to learn at home, started making a program for company i work for. Made SQLite database consists of 4 tables, one of them is "Empeloyees" that have data of employees at the company including departments and professions. Second table records Holidays taken by those employees. This is My Main Activity code: class DBHelper(context: Context) : SQLiteOpenHelper(context, DB_Name, null, 1) { override fun onCreate(db: SQLiteDatabase) {...

Best API to do background task in android? Which is fastest Kotlin Coroutines or Work Manager API to fetch images and videos from an Android phone. Or any other Methods ?

Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull I'm getting this error 2019-11-13 113313.507 17714-17714/com.nandrezholdingslimited.pebblar E/AndroidRuntime: FATAL EXCEPTION: main Process: com.nandrezholdingslimited.pebblar, PID: 17714 java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter p1 at com.nandrezholdingslimited.pebblar.features.map.MapViewModel$docList$1.invoke(Unknown Source:2) at...

Receive transformation map function to send into `List&lt;&gt;.mapNotNull()` Im trying to write a function like transform that receives a function that will be used inside of mapNotNull but I cant find a way to do it. Example val items: List = listOf(null, "cosa") fun transform(transformer: (String) -> String?) { items.mapNotNull(transformer) // String? = { null } val map = transform(transformer) print(map) } You can check how this works here: <a...

Flutter error: Could not download bundletool.jar (com.android.tools.build:bundletool:0.9.0) pls how can I resolve this flutter error What went wrong: A problem occurred configuring project ':flutter_udid'. Could not resolve all artifacts for configuration 'flutter udidclasspath'. Could not download bundletool.jar (com.android.tools.buildbundletool0.9.0) Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/bundletool/0.9.0/bundletool-0.9.0.jar'. Read timed out Could not download kotlin-stdlib.jar...

Animation with TranslateY is holding Constraints before you start: I'm using Kotlin I'm using ConstraintLayout (switching to LinearLayout or RelativeLayout is not an option) I have my layout as follows: ... And my animation is developed as follows: myRefer.animate() .translationY(-myRefer.height.toFloat()) .alpha(0.0f) So far so good, no problem with the animation, everything goes as expected. The problem is, I thought that from the moment I'm using TranslateY, the ScrollView...