Android border around each letter on a textview I would like to add a border independently around each letter of my textview like this example : Actually I have a basic TextView in purple , but I would like to add yellow border as you can see on this image. I tried many solutions but nothing work especially , let me know if you have something. Thanks !

Room recursive nested objects Here i have category object which can have child categories. I'm trying to store child categories with Room's Relation instead of using TypeConverter. But i get StackOverflowError exception. What's the best way to handle this situation? Is there any...

how to skip the song that media player is playing I want that my mediaplayer should skip the song, if it is previously being played. if I am resetting the mediaplayer, then it is not skipping rather the whole application resets. Whenever this activity is called my mediaplayer is getting reset. I want that my mediaplayer should reset only under the condition stated. Here is my overridden onActivityCreated method in which I've implemented that part to play song in my application: override fun onActivityCreated(savedInstanceState:...

How to check whether a type is an enum in Kotlin? At runtime, I am trying to verify whether a particular KClass is an enum type or not. What is the best way to do so? Can this be done without relying on a particular runtime (e.g., JVM or JS)? fun isEnum( type: KClass ): Boolean { ... ? }

Recycler view android Whenever a change a value in the onbind function of my adapter, a new item is added override fun onBindViewHolder(holder: ViewHolder, position: Int) { holder.postItemTitle.text= items[position].title var post:Post=items[position] val user_id=1 var user_liked=post.users_liked if(user_liked.contains(user_id)){ post.liked=true } if(post.liked){ holder.postLikeBtn.setImageDrawable(context.resources.getDrawable(R.drawable.likered))...

RxTextView in Kotlin cannot extract String from KFunction1 In Java I use RxTextView and call .subscribe() in Fragment to invoke and transmit String as a parameter to a method in Presenter. Everything works fine. Java: compositeDisposable.add( RxTextView.textChanges(searchEditText) .map(CharSequence::toString) .debounce(500, TimeUnit.MILLISECONDS) .distinctUntilChanged() .observeOn(AndroidSchedulers.mainThread())...

Context with programmatically overridden settings I'd like to create a bunch of Views with a context that is based on some style, but also some dynamically calculated overrides. I'd like to create a Context that encapsulates all that, so that I can pass that to various different View constructors. To make my question more complete, without the dynamic part, I'd be using a ContextThemeWrapper like this: // in my onCreate val styling = ContextThemeWrapper(this, R.style.TextBase_OutputText) val v1 = TextView(styling) val v2 = Button(styling)...

Kotlin plugin error: Could not generate a proxy class for class I have created Gradle plugin written in Kotlin but after I had included it into my project I faced following error: Failed to apply plugin [id 'my-plugin'] Could not generate a proxy class for class MyTask This is code of my plugin, I was using custom gradle task class MyPlugin : Plugin { override fun apply(project: Project) { with(project.tasks) { create("uploadTask", MyTask::class.java) } } } class MyTask : DefaultTask() { @TaskAction fun run() {...

Kotlin : The specified child already has a parent. You must call removeView() on the child's parent first Can anyone tell me what is the problem. This is the code: package com.mohdjey.user.inflate import android.support.v7.app.AppCompatActivity import android.os.Bundle import android.os.strictmode.WebViewMethodCalledOnWrongThreadViolation import android.view.LayoutInflater import android.view.View import android.widget.ImageView import android.widget.LinearLayout import android.widget.TextView import com.mohdjey.user.inflate.R.id.root_layout import...

warp MVP presenter inside viewmodel in android? one of mvp presenter pattern disadvantages is handling activity state or orientation change , while viewmodel survive orientation changes , so can i wrap presenter inside a viewmodel and still using MVP ?

Room: how to check whether row exists In my repository class, I want to fetch data only if none exists in a Room table. How to check whether any row exists in a table?

Nested relation of the same type According to the documentation relations could be referenced to Pojo classes only. How to define nested dependency of the same type? @Entity(tableName = "humans") data class Human { @Relation val children:List }

Kotlin function parameter with receiver, called from Groovy Kotlin and Groovy both provide a way to write a high-order function where the function parameter has an implicit receiver. class KotlinReceiver { fun hello() { println("Hello from Kotlin") } } fun withKotlinReceiver(fn: KotlinReceiver.() -> Unit) { KotlinReceiver().fn() } withKotlinReceiver { hello() } In Groovy, one can achieve similar results with a closure delegate: class GroovyReceiver { void hello() { println("Hello from Groovy") } }...

Immutable data class to mutable I have a immutable data class which I use as a standard template. I want to create a wrapper which contains this prototype, but in the process I want to transform the prototype from immutable to mutable. Is there any way one would transform all fields from val to var, and collections from immutable to mutable, without creating duplicate class?

Android things: DP 7 retired PeripheralManagerService and I have issue with PeripheralManager I have 1 project based on this: https://github.com/Nilhcem/i2cfun-androidthings https://github.com/neuberfran/SmartDrive5 (the latter is my project) But, when I change PeripheralManagerService to PeripheralManager (DP 7 and APi level 27) try { PeripheralManager manager = PeripheralManager.getInstance();...

check internet connectivity android I tried the answer from this (the accepted answer). I can use the "PING" method but the UI went black since it says it will blocks the UI Thread. It didnt look good and disturbing so I tried to use the second method "Connect to a Socket on the Internet" but I dont know how to use the class in Kotlin. this is the result of converted Java to kotlin by android studio...

Kotlin Access variables inside DatePickerDialog.OnDateSetListener I have few variables declared and initialized inside in a function below in DatePickerDialog.OnDateSetListener: fun pickDate(view: View) { val eventDate = (findViewById(R.id.event_date_text_)) val c = Calendar.getInstance() val year = c.get(Calendar.YEAR) val month = c.get(Calendar.MONTH) val day = c.get(Calendar.DAY_OF_MONTH) val months = arrayOf("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec") var monthOfYear = 0 val dpd =...

(Kotlin)NullPointerException in xml elements using callback with Dagger 2 object instance NullPointerException in textview when I try to change text by dagger 2 instance object. Note: Using a common instance (new Myobjcet(this)) works. Activity class MainActivity : AppCompatActivity(), MyCallBack{ @Inject lateinit var myObject: MyObject override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) mytextview.text = "first change" val...

How to test reading from/updating file in MVP? I'm trying to change my app from having no design pattern to using MVP. Originally I had the following code: override fun onCreateInputView(): View { //favoritesData is an instance variable, same with "Gson", "parser", "favorites", and "stringArrayListType" favoritesData = File(filesDir, "favorites_data.json") if (favoritesData.exists()) { favorites = Gson.fromJson(parser.parse(FileReader(favoritesData)), stringArrayListType) } } and fun updateFavoritesFile() {...

android listview baseadapter slow and lag in scrolling Hello guys i am trying i have make a listview with baseAdapter that show's a ImageView's with text view for every item (Image and Text for every item ) every thing is fine my problem is the listview scrolling is too lagy and slow this my cod ListAdapter class MyListAdapter:BaseAdapter { var ListLocal = ArrayList() var mCtx : Context?=null constructor(ListArrayList,mCtxContext){ this.ListLocal = List this.mCtx = mCtx } override fun getView(position: Int, convertView: View?,...

Organize imports on merge conflict automatically This is about a small workflow improvements. Questions Is there a command line tool that I can use in a Github bot to automatically organize import statements on merge conflicts. Example master branch: File A: import package.A import package.C feature branch: File A: import package.A import package.B Those 2 branches will lead to a merge conflict that looks something like this: import package.A

>>>>>> master

import package.C ========== import package.B

Converting Flowable<List<T>> to Single<Boolean> I have an function in @Dao. Lets call that class DaoClass abstract fun getData() : Flowable Now, I want to check if list of data returned is empty or not. I dug through the DaoClass_Impl (generated at build time) and I found out that the Flowable won't be empty. So, getData().isEmpty will always return false. So what I did was getData().singleOrError().map{it.isEmpty()} to return if the returned list is actually empty. But I am having problem as the value is not getting emitted.

Dialog Alert in kotlin I need to click to button 'b_avanca_c' if the user don't fill the field 'editTextNomeVelhinho' present the dialog alert and after the user fill the 'editText' must forward for layout 'C_aviso', as well as if 'editText' is filled from the beginning. In this case the aplications always goes to 'if' and even after it is filled in the dialog box always appears. fun b_avancar_c(view: View) { val nomeIdoso :String nomeIdoso=editTextNomeVelhinho.text.toString()...

Connection to service and display to editText I'm new to the kotlin world, anda i need HELP!! I have this class 'E_ex1Por' that make connections the a Service in Python to Kotlin with Android. package com.example.asus.aprendecomigovelhinho import android.annotation.SuppressLint import android.content.Intent import android.support.v7.app.AppCompatActivity import android.os.Bundle import android.support.v7.widget.LinearLayoutManager import android.view.View import com.google.gson.GsonBuilder...

Populating a Kotlin Data Class using Gson I am attempting to populate a Kotlin data class from a corresponding string value. I looked at: Kotlin Data Class from Json using GSON but what I am attempting to do is not tracking exactly the same: fun convertStringToObject(stringValue: String?, clazz: Class): Any? { return if (stringValue != null) { try { val gson = Gson() gson.fromJson(stringValue,...

Kotlin and use padEnd() twice I tried using padEnd() twice on a String. The first time the padEnd() extension function works as expected, but the second time, it does not add the any characters I tried. My code: var s = "Hi -> " s = s.padEnd(10, 'O') s = s.padEnd(5, ' ') println(s) My output: Hi -> OOOO I am using kotlin version 1.2.50. I also tried <a...

How can i hide some portion of a view in android? in image one i want hide some portion of options such that user have to rotate his phone like in image 2

Android studio - App not install and launch while do the Debug or Run I have created a new app, this is built successfully, but is not install and launch the app while I try to do Debug or Run. My android studio version is 3.1.3 apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin' apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' apply plugin: 'realm-android' apply plugin: 'kotlin-kapt' apply plugin: 'io.fabric' android { compileSdkVersion 27 defaultConfig {...

Apk gets crashed on other devices I am working on app.i tried to create an apk of the app and install in other devices.but it shows App has been Unfortunately Stoppped. But in my phone(redmiNote 4 APi 24)Apk works fine.i tested in samsung(api 17) and on one kitkat version phone(in these devices it is crashing) My build gradle(project) apply plugin: 'com.android.application' apply plugin: 'kotlin-android'...

What does a CREATOR field look like? My Parcelable class wants me to include a CREATOR field, but I have no idea what such a field looks like. I have silenced the complaint with SupressLint in the meanwhile, but would like to have that CREATOR field. Any idea what it looks like? @SuppressLint("ParcelCreator") @Parcelize class RecipeTemplate: Parcelable { var recipeHeader: String? = null var recipeText: String? = null var recipeImage: String? = null var recipeKey: String? = null }