How to get a char from user in terminal? How can i get input from terminal for character in Kotlin? I tried using readline(), but throws me an error fun asciiConverter(){ print("Enter the character to convert into ASCII : ") var characterVariable : Char = readLine() println("ASCII value is : ${characterVariable.toInt()}") } The above code throws me an error, Type mismatch. Required : Char, Found : String? I don't know how to change a string to character. Is there any other function like readline() to get character?...

i am having an issue with this android studio Kotlin program: I am running an app that has 2 buttons, one for increasing value and another for decreasing value. in this I need to run the values between 10 and 0 but I couldn't do it(whenever I run the app, it goes below 0 and over 10). class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) var count = 10 val textCount = findViewById(R.id.textView) as TextView...

how i can crop image while selecting image from gallery? im referring this tutorial--> http://www.androidcoding.in/2018/02/17/android-upload-image-using-retrofit-library-part2/ this tutorial only does selecting an image from gallery not cropping it actually my idea is use to select an image from gallery and upload that image using retrofit post which you will find in my code -->this is implemented only left is...

Need an example of a custom View that inherits from LinearLayout I am trying to create a simple weather app, and I'd like to create a custom View that inherits from LinearLayout. I haven't found any examples online, so it would be great if somebody could help me out. My LinearLayout custom view should have three textviews. Examples would be greatly appreciated. Thanks in advance!

How to open an image and put something in it I have an image that has some blank space I need to put some numbers inside blank spaces and save a new image there is no need to show anything as UI and all things will do in the background

How to get the author of an Android Studio project? I got an Java/Kotlin app built with Gradle and compressed with a .zip extension that was developed in Android Studio. After extracting, how can I find out the author of an existing project who created it?

Android : Kotlin : MVVM : Why viewModel.onButtonClicked() causes the app crash? Logcat Message : java.lang.IllegalStateException: Could not find method @={() -> viewModel.onBtnClicked()(View) in a parent or ancestor Context for android:onClick attribute defined on view class androidx.appcompat.widget.AppCompatButton with id 'button' File1 : activity_main.xml File 2 : MainActivity.kt class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) val binding: ActivityMainBinding =...

Crash not appearing in firebase issues after adding a new app to existing app There is a an app on firebase and on Android studio.These apps was not connected and I connected both of them. But I could not change package namein firebase So I changed applicationIdin Android studio.The android app was created in kotlin.I added this throw new RuntimeException("Test Crash"); // Force a crash to OnCreate.After 5 min I could see in Firebase from Crash-free statistics part one issue was reported. But Issues part it says No issues found.So how can I fix this problem?

Can anyone help me, that why array list in kotlin not storing data after initialization I am trying to fetch data from the firebase realtime database and I am storing it in a list of User data class to display it in the recycler view but the list is not storing any data. I tried to add some dummy data during initialization and that is working perfectly but after initialization, it is not storing anything I tried with the mutable list too but that is also not working The main fragment where I am retrieving the data class UserChatFragment : Fragment() { lateinit var mobileno:...

save Instance State in Android studio Kotlin I am having issues on adding saveInstanceState in this program to save the textview output while changing from portrait to landscape mode . HELP needed class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) var count = 10 val textCount = findViewById(R.id.textView) as TextView val buttonred = findViewById(R.id.injury) as Button val...

Unable to resolve host for Qualtrics API Hi i am facing an unresolve host problem. I have tried my corporate network and my own network and it fails for this code. When I enter the android screen for this, the error in logcat shows up. I have tried 2 networks and doesnt work. The floating action button also does not respond when I click on it. The Qualtrics.instance().initialize is the one leading to the HTTP error. Can someone help me with the problem? Code Log.d("TAG", "Initializing Qualtrics")...

How to have a string Bold into a textView with Kotlin? I want to have a string Bold into a textView with Kotlin, here's my code : val priceTxt = "10.000" ///example val msgTxtPrice = "starting from ".plus(" ").plus(currency) .plus(priceTxt) val spannable = SpannableString(priceTxt) val indexStart = msgTxtPrice.indexOf(priceTxt) val indexEnd = indexStart + priceTxt.length spannable.setSpan( StyleSpan(Typeface.BOLD), indexStart, indexEnd,...

how to reopen app just when it is not in background after tap on FCM notitiction I'm using FCM to send notifications to my app, but there is a problem. if my user is using the app and just press the home button( not back key) to exit the app and got a notification, then press on the notification, my app will reopen. if the user presses the back button, he/she exits from the reopened app and he/she will be directed to the last state of the app just before pressing the home button.(in the other word, the user should presses back button twice, once for exiting from reopened...

Arrow Meta in Android Has anyone succeeded in including Arrow Meta in an Android Project? I have been trying to do this and the first issue I encountered was that it is not working with kotlin 1.3.7 (here there is a question related to that). After downgrading to 1.3.61, I follow the example we have <a...

Extract JSONObject and iterate through HashMap field I am trying to iterate through a value (that is a hashMap) of a JSONObject. First I get a server response that is a String. Then I turn it into a String! like this: val responseString = response.serverResponse Then I turn it into a JSONObject like this: val jsonObj = JSONObject(responseString.toString()).get("data") I do the second step because I only want to keep the LinkedHashMap shown in the picture attached. But the second step returns type "Any" and then I cant iterate through the...

Is it possible to make sure only one row in an Android Room database contains a boolean value 'true'? I want to have a list of accounts saved by the user, but there should be one active account, therefore there should be one account flagged with isActive=true in the Android Rooms Database. Is this possible? The only thing I could find was that Android Room saves a boolean as 1 (true) or 0 (false).

Create a table in room database android studio kotlin I want to create a table in room database in android studio using kotlin with the following columns table_id INTEGER, user VARCHAR2(10 BYTE) NOT NULL, pwd VARCHAR2(10 BYTE) NOT NULL, date DATE, value VARCHAR2(4000 BYTE) dt_code VARCHAR2(100 BYTE) i am created entity class is this correct @Entity data class User( @PrimaryKey val table_id : Int, val user : String, val pwd: String, val date: Date, val value: String, val dt_code: String, )

How to transform mutable map with certain data to array list? I have a mutable map with key of week days and values of time range items: MutableMap Period(start, end) For example: monday: [Period = {start: "11:00", end: "12:12"}, Period = {start: "15:00", end: "16:12"}], tuesday: [] and etc I need to transform this map to array list like that: [(Period = {start: "11:00", end: "12:12"}, [monday, tuesday, friday]), (Period={start: "15:00", end: "16:12"}, [sunday, monday, thursday]) etc] Could anyone help with that please?

Google Play In-App Review API. How to check if the user has rated the app? Is it possible to check if the user has rated the app using In-App Review API?

@SpringBootTest classes run in same thread although configured concurrently I have several test classes that are annotated with @SpringBootTest and also AutoConfigureMockMvc. They look like this: @SpringBootTest @AutoConfigureMockMvc class ThymeleafFormatIT { @Autowired lateinit var mvc: MockMvc @Test fun

test something

{} } Since there are several of these tests, currently five, I want to run the test classes in parallel. I want to take the time it takes to run these tests down as far as possible. Since I use Junit 5 and Maven, I have configured...

image is not uploading after crop using retrofit android im referring to this tutorial for cropping --> https://www.android-examples.com/android-image-cropping-example-tutorial-pick-gallery-camera/ it is placing the cropped image in imageview in edit profile activity on submitting it is showing success that updated successfully.. but on acccount activity it is not showing image on profilepic... when debugged it is...

Load Retrofit image into Imageview I am using Retrofit and Glide for a simple Image and textView. In my "Description" fragment I want to display the image from the api into the ImageView just under the textView. My recyclerView images work perfectly, but how would I display a single image from the retrofit/api into this Description class. I added val imageView:ImageView = view!!.findViewById(R.id.item_image) But I am lost after this. This is the fragment with the textview and where I want to place the ImageView under...

Keep updating the same activity with different data on button click I have an android application that asks users a few questions, kind of a survey. Each question has an YES and a NO Button. So when the user presses either YES or NO button, a new Button to go to the next question becomes visible over the YES and NO buttons. When the user clicks on the next question button it changes the textview for the question to the next question text as well as the imageView for that question changes. I am making use of DataBinding along with LiveData. I have created a...

Convert String to Map without regex I have a server that returns a String of this format: {"success":true, "visible":false, "data": {"ref":"asfdasfsadfaeweatsagsdfsad", "userRef":"asdfsadfsa","accountType":"REAL",balance":43}, "code":"2200", "msg":null, "msgRef":null, "successAndNotNull":true, "failedOrNull":false, "failed":false, "failedAndNull":false}` Then I extract the data by doing this: val jsonObj : Any! = JSONObject(serverResponse.toString()).get("data").toString() and I end up with this String:...

Getting empty List from datasnapshot from firestore using kotlin I have stored data in firestore database in array. I have created an array in document(user) and inserted custom object (Data class) in that array. Now I want to access that array and for that I have created two data class data class Student( var studentFirstName: String? = null, var studentLastName: String? = null, var studentRollNo: String? = null, var fkSemesterId: String? = null, var fkDivisionId: String? = null, var fkSectionId: String? = null, var studentGender: Any? = null, var...

How to make if String doesn't ends with in Kotlin I had my own idea but it didn't work String.text != String.text.toString().lastOrNull() in arrayOf('+', '-', '/', '*', '.') With error operator "!=' cannot be applied to 'CharSequence!' 'and Boolean' Full: if(operation && currentOpperand.text != currentOpperand.text.toString().lastOrNull() arrayOf('+', '-', '/', '*', '.') (I want to make if Boolean "operation" == true and string doesn't ends with this array of chars print "+". (making calculator))

Elegant Kotlin Object Enriching I would like to output an object based upon an input object. I want to enrich it by populating an empty array contained within the input object. The new array is based on an existing array contained in the object. The output object is deep equal to the input object except it contains the new array. I have developed the following code block: fun enrich(a: T1) { val b = mutableListOf() a.forEach { it1 -> val bb = mutableListOf() it1.aa.forEach { it2 -> val...

java.lang.RuntimeException: Applying effect in wrong GL context! in android app while applying the filters on images I have searched for this question but couldn't find any solution to that. I am developing a photo editor app that uses a third-party library to apply effects on the images. I am showing all the filters that are available in-app in horizontal recyclerview. But when I scroll the recycler view my application crashes. Here is my adapter code. class MyFilterAdapter ():RecyclerView.Adapter(){ lateinit var...

Android studio 4.0 Could not resolve all artifacts for configuration ':classpath'.Received status code 403 from server: OK I have installed Android studio in Mac when i try to create new project it is not building for Kotlin and Java both languages. Bellow exception is for Java project. Exception is: org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project 'SampleJavaApp'. at org.gradle.configuration.project.LifecycleProjectEvaluator.wrapException(LifecycleProjectEvaluator.java:80) at...

Find type of data structure What type of data structure is this? I am pretty confused about it and prevents me from completing my work. Is there a way to find out? I think it is a JSON string. [{"id":"sfdfs", "balance":{"amount":133, "type":"GBP"}}]