Navigating using a navigation drawer and fragments I am currently using a navigation drawer with navigation fragments, however I cant figure out how to combine the navigation drawer so that when you press one of the buttons on the navigation drawer, it navigates to the respective fragment. I have created 3 fragments already. I am trying to do this as well while using binding as well but so far without any luck. Anyone got some suggestions? This is my MainAvtivity: class MainAppActivity : AppCompatActivity() { private lateinit var...

How to save string to pdf? Do you know how to save string to pdf. I use this code and it doesn't work or it saves somewhere else. fun stringToPdf(data: String) { // val extstoragedir = Environment.getExternalStorageDirectory().toString(); val path = applicationContext.filesDir.absolutePath val extstoragedir = path val fol = File(extstoragedir, "sample.pdf"); val folder = File(fol, "pdf"); if (!folder.exists()) { val bool = folder.mkdir(); } //...

OsmDroid: User agent doesn't work with Fragments Every example available on the internet tells us to use this line of code to get the user agent (without it the map won't load). osm.osmdroid.config.Configuration.getInstance() .load(applicationContext, this.getPreferences(Context.MODE_PRIVATE)) The problem is that applicationContext yields "Unresolved reference". Same goes for this.getPreferences(). I've tried to put that code into MainActivity (no fragments) and it works. Is there any way to replace it in this context?

Saving CheckBox States When Switching Between Activities (Kotlin) I'm making an Android app in Android Studio for my girlfriend to help her keep track of her tasks at work. The app has multiple to-do lists using RecyclerView. Since each checklist has their own activity, and she will be switching between them, how do I save which boxes have been checked so that they remained checked when switching between activities? Here is the RecyclerView adapter code for one of the to-do lists that also contains the Checkbox code. package com.mattkalichman.coffee import...

Class does not show override methods from inheritance class I have created class ScreenDrawer that has 3 functions. And I have a class ChatsScreen that inherits the ScreenDrawer. But for some reason when I click Ctrl+O in Android Studio I don't see methods that I can override as I can do in MainActivity that extends AppCompatActivity. So how I need to organize classes so my ChatsScreen could see ScreenDrawer methods by inherit it. Here is my ChatsScreen Here is my...

ANDROID STUDIO BLE: How do I add the LeDeviceListAdapter class to my BLE project? I am new to Android Studio and to BLE. I am working on a program that will scan for a beacon to read information. I am following this tutorial and the closest solution to my problem I found so far was this post. I am trying to get my app to respond to...

Equals() between objects of inconvertible types SQLite Android in all my insertData methods im getting this warning fun insertDataOwnerTable(nickname: String, ownername: String, ownersPhone: String, pin: Int, dateSignup: String, country: String, ownersMail: String): Boolean { val db = this.writableDatabase val cv = ContentValues() cv.put(NICKNAME_COL, nickname) cv.put(NAME_COL, ownername) cv.put(PHONE_COL, ownersPhone) cv.put(USER_PIN, pin) cv.put(DATE_SIGNUP, dateSignup)...

RecyclerView and OnItemClick: No value passed for parameter 'click' in Fragment I'm trying to implement an OnClick listener for specific items in a recyclerview. I've done it before with activities, but now I want to do this in a fragment and I've run into a problem. I'm getting the error No value passed for parameter 'click'. This is the line of code that gives that error: recyclerAdapterAbstract = abstractList.let {AbstractAdapter(requireActivity(),it)} This the only error Android Studio is currently showing me. The logcat doesn't show any error. Only the Build Output...

why is my android studio showing Unresolved reference: ExpressionBuilder:49?

Installing SDK (Java) in flutter APP MainActivity.kt I am a new bee to coding. I am getting an error while Initialise the SDK in my app Application file as @Override public void onCreate() { super.onCreate(); Cuelinks.initialize(this); } the error is : * What went wrong: Execution failed for task ':app:compileReleaseKotlin'.

Compilation error. See log for more details

My app is a flutter app. I need to paste the above code in MainActivity.kt I would be very thankful if I get any solution. Please help

Kotlin String.split().filterIndexed() is returning empty list with size 1 fun main() { val delDetails = "2-hello,3-world,4-why,5-is,6-it,7-like,8-this" val delDetailEmpty = "" val delPositions = delDetailEmpty.split("-",",").filterIndexed { index, _ -> index % 2 ==0}.toMutableList() println(delPositions.size) //it returns empty list [] with size 1 println(delDetailEmpty.toList().size) //this returns empty list [] with size 0 } println(delPositions.size) returns empty list [] with size 1 whereas, println(delDetailEmpty.toList().size) this returns empty list []...

When will Jetpack Compose launch recomposition and what will be recomposition.? I was told "You need to create scopes if you need to have scoped recompositions" by Thracian in the question. It seems that I can't find the policy from official documnet. The Code A is based the answer of Thracian. I get Result A when I run Code A. 1: When will MyColumn(Calendar.getInstance().time.toSeconds()) be launched ? 2: Why is CallMyColumn()...

kapt.use.worker.api is deprecated After build I get this warning: 'kapt.use.worker.api' is deprecated and scheduled to be removed in Kotlin 1.8 release. Knowing that I have in my gradle.properties : kapt.use.worker.api=true and in my Module level build.gradle : apply plugin: 'kotlin-kapt' then, what is the alternative to the deprecated line ?

easy way to flag library functions as deprecated / forbidden in android studio I have a mixed Java / Kotlin project in Android studio with the usual bunch of androix libraries. Is there an easy way (short of writing custom lint/detekt/ktlint rules) to essentially deprecate certain usages of third party libraries? Assuming I have no way of actually changing the code in the library itself. For example, the library has a method foo, I'd like all usages of that method to be flagged and break the build.

Kotlin shuffle a list and validate list value with user value I have a list that holds string values as directions, for each time is started is shuffle the list val directions = mutableListOf("left","right","up","down") directions.shuffle() I am running a continuous loop to check if the percentage value has grown to a certain point before breaking the loop if(progress != 100){ //continue until progress is 100 } I send the instructions to the user and if they match the progress value increases when(directions){ "left" -> { // print...

How to change "val" values in an object withotu changing the definition to "var"? I have a complex Kotlin data class, say something like this: data class Post( val message: Message, val dateAndTime: LocalTime, val postAuthor: Author?, val visitorsVisitedTimes: List ) and each of Message, LocalTime, ... are different data classes. I have an object of above Post data class. I want to parse it, access visitorsVisitedTimes field value, for each pair, replace Author object with corresponding postAuthor. I have to make similar changes in the Message object as...

My Exo player not working with youtube url? I used Youtube extractor library https://github.com/HaarigerHarald/android-youtubeExtractor it is showing java.io.FileNotFoundException: <a href="https://www.youtube.com/get_video_info?video_id=TNAMFEo07PU&amp;eurl=https%3A%2F%2Fyoutube.googleapis.com%2Fv%2FTNAMFEo07PU" rel="nofollow...

Compose deep link is causing my view model data to be empty I am working on a project that uses jetpack compose and whenever i load a composable through deep links, any data that gets loaded quickly appears then goes missing. my deep link is pretty straight forward composable( DestinationScreen.Screen.route + "/{index}", arguments = listOf(navArgument("index") { type = NavType.StringType }), deepLinks = listOf(navDeepLink { uriPattern ="pattern/job/{index}" }) ) { entry ->...

kotlin findViewById returns null I have the following code which after clicking on the button findViewById returns null but when I set the onclick attribute of the picture itself to change the picture there is no null exception returned. This code returns null exception: private lateinit var imageView1: ImageView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } fun change(view: View){ try { imageView1 =...

Destructuring declaration initializer of type Array&lt;String?&gt; must have a 'component6()' function in Kotlin I am having one issue in Destructuring in kotlin. I am doing one functionality in A/B Testing. Previously this was in if-else case and that time it works fine. Now moved it to Kotlin file and when i am trying to add 6th params(need to add more params) I am getting the error "Destructuring declaration initializer of type Array must have a 'component6()' function". I am pasting my code here, Could anyone please help me to resolve this error. class SampleRepository( private val...

How to get the current time using Event Channel? I need to get current time using Event Channel.Receive on button click. I don't understand how to write code in kotlin file. How can I get the current time using Event Channel? I have attached the Flutter code and kotlin file below. class HomePage extends StatefulWidget { const HomePage({Key? key}) : super(key: key); @override State createState() => _HomePageState(); } class _HomePageState extends State { static const EventChannel _eventPlatform =...

How can I search data from firebase using searchview in kotlin? I need some help about add search view to android studio kotlin project and it related to Firebase Firestore

Android - How to make a pop up message notification like this? The pop up message is the Green one. I tried to use snackbar but many says Snackbar cant make custom layout and Toast doesnt have an action. So what should I use to make that green pop up message?

Logging in FlutterActivity not appearing in VS Code I'm developing a Flutter app, using VS Code. I've added some logging to my FlutterActivity, as follows: package com.example.package import android.os.Bundle import android.util.Log import io.flutter.embedding.android.FlutterActivity class MainActivity: FlutterActivity() { val TAG = this.javaClass.name override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) Log.d(TAG, "Hello World!") } //... When I run my app, I expect to see...

create objects based on elements of a list Suppose I have the below lists and data classes in Kotlin: val qrtr = listOf("Q1", "Q2", "Q3", "Q4") data class X(val name: String, val location: String) val x1 = X("John Doe", "USA") val x2 = X("Jane Doe", "Singapore") val allX = listOf(x1, x2) data class Y(val title: String, val rating: Double) val y1 = Y("Senior", 4.8) val y2 = Y("Junior", 4.5) val allY = listOf(y1, y2) Is there an easy way to create another list using a 3rd data class using the above lists of allX, allY and qrtr. data...

How to add spaces between numbers with Kotlin How can I convert Float into a format like "2 000 000.00 USD" with Kotlin?

Please help me find errors in this small piece of code I am into Android Development. I don't know Kotlin just Java but had to submit a project in Kotlin so I wrote the code in Java and Used the inbuilt "Convert Java code to Kotlin Code" feature of Android Studio. But the converted code has some errors, I don't know how to solve them. Heres the code: package com.varunsen.newcards import android.os.Bundle import android.view.View import android.widget.ArrayAdapter import android.widget.ListView import android.widget.TextView import...

Error executing DDL "create table users (...)" via JDBC Statement I am trying to learn how to use the H2 database in my Spring Boot application but am running into trouble with respect to creating a table representing the defined entity located in User.kt. Seemingly the table creation fails and as such the data insertion from data.sql reasonably so also fails. I don't understand what I am doing wrong. I am not sure if it's relevant or not but I have googled around for a while to try and solve this and came across some comment or two somewhere saying...

Multithreading - working with threads in Kotlin I am currently studying the basins and want to understand the work with multithreading, but I can not understand the task Calculate f (x) * g (x) using 2 auxiliary threads: one calculates f (x) and the other g (x). The main program performs I / O and operation *. Note that the functions f and g - can be partially defined (ie "loop" and never return the result). It is necessary to process such situation correctly and to ask the user: "to continue calculation, to stop or to continue, without...