Blue moving direction arrow accuracy is not the same as calculated from GPS (Maps SDK) I'm using Maps SDK. As default i have blue point location and when device moving we can see arrow of movement direction. I'm drawing line from this point by using method: SphericalUtil.computeOffset(gps.myLocation, 150.0, gps.bearing) Then i just draw polyline from my location to this end location. And it's ok it's working fine and it's the same as Maps arrow moving direction. But we are changing min zoom to Map's min zoom (2000km) i have issue as presented on a screenshot. Accuracy of my...

How to Save Content Uri of Image and Video in External Storage? I get uri from External Storage using Document Tree. now i want to save selected uri in my App folder that's in External Storage?

How to show image in fragment ImageView from firebase storage I wanted to know is there a way i can show my image view image in fragment. The image i am getting is from Firebase storage and passing the bitmap value through a view Model function and including the value in the fragment. I wanted to know is there a better way to do this? Also when there is no image, the image still shows when i pair it up with androidswipetorefresh listener Main Activity Code val imageName = auth.currentUser?.uid val storageRef =...

App made with JetPack Compose is hanging beyond expectation I am new to JetPack Compose. I am leanring Compose and was following https://developer.android.com/jetpack/compose/tutorial But when I ran the application in my android device, the app was extremely slow. Simple things like expanding long message and changing color of message is taking so much time. I have googled the problem and found: <a...

How to refer to a public method of a java Activity class from the Kotlin companion object? I have a mix of Kotlin and Java code in my Android App. I need to refer to a public void method declared in an Activity having java code from a Kotlin companion object. I tried some ways including making the method static but of no use. // java code class SampleActivity extends Activity{ public void toggleMark(boolean canTic) { // some code } } //Kotlin code class MyUtils { companion object { fun setTicPref(context: Context) { // some code...

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.shop, PID: 5381 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.shop, PID: 5381 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.shop/com.example.shop.activities.DashboardActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.appcompat.app.ActionBar.setTitle(java.lang.CharSequence)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449) at...

grpc kotlin plugin is not generating dsl code I have an existing project which is using gradle with kotlin DSL. I have setup protobuf code auto-generation with gradle build. Kotlin grpc code is generated and I am able to implement my backend using flows and coroutines. But the kotlin DSL code is not getting generated. So I am currently left with usage of verbose boilerplate driven builder pattern for creating my objects. Below is my protobuf plugin setup. protobuf { // generatedFilesBaseDir = "generated-sources" protoc {...

TextField onValueChanged not calling I have a readonly TextField that takes value from DatePicker (not composable). The problem is that when value of TextField changes the onValueChange callback doesn't calls. When i try to change value via user input (make readonly = false) i works fine. So any solutions to call onValueChange without user input? Some code: val start = remember { mutableStateOf(state.timeStart) } OutlinedTextField( value = DateTimeConverter.formatLogsTime(start.value), onValueChange = {...

Android CameraX NoSuchMethodError: No static method getOrCreateInstance(Landroid/content/Context;) I run Android emulator and crash at "cameraProviderFuture = ProcessCameraProvider.getInstance(requireActivity())" this line. Why? override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) val barcodeScannerOptions = BarcodeScannerOptions.Builder() .setBarcodeFormats( Barcode.FORMAT_QR_CODE ) .build() cameraProviderFuture =...

Reduce Application size when using NDK I am using cropping library which include ABI filters so when I generate apk or bundle its size is to much unto 308Mb so is there any way to reduce apk size without using ABi Filters. this is my Gradle default config. defaultConfig { applicationId "com.document.scanner.fast.scan.pdf.create.pdf.test" //com.document.scanner.fast.scan.pdf.create.pdf.editor //com.document.scanner.fast.scan.pdf.create.pdf.test minSdkVersion 23 targetSdkVersion 30 versionCode 1...

Android Studio Sync Error: java.lang.NullPointerException I use Android Studio Arctic Fox and Kotlin 1.6. I just downloaded my app source code from GitHub, and when I sync it in Android Studio, it fails and outputs this stacktrace. When I checked it it's not helpful at all to me and doesn't point to anything in my app code or any dependencies. Can anyone explain? Cause: java.lang.NullPointerException at org.jetbrains.plugins.gradle.tooling.serialization.internal.IdeaProjectSerializationService.(IdeaProjectSerializationService.java:46) at...

How do multiline text in Android Studio I am practing Android Studio trying to make a simple App, with multiline text.. I tried writing the text how I know how to from kivy, and I read this sometime before, using """ text\n another text """ Here's the textView Code: it doesn't seem to work, and I tried writng it plainly, like: "Text\n Another Text" and it works, but this can be really difficult to go through, is you are working with really long texts.. just in case, Here's the textView code to the second way I tried:...

How to draw ImageVector on Canvas jetpack compose I am converting SVG to vector asset by importing it to android studio. How can I draw that vector to canvas with jetpack compose. The only option I see is drawImage, which only takes ImageBitmap. But this is a vector and not a bitmap, so is there a way to just draw ImageVector. val logoVector: ImageVector = ImageVector.vectorResource(id = R.drawable.diasyst_logo)

how do p-256 scalar multi in kotlin? so i want deriveSharedKey in kotlin , i already have x, y and privkey, i have reference from my friend but in golang like this: func deriveSharedKey(privKey ecdsa.PrivateKey, publicX []byte, publicY []byte) []byte { x := new(big.Int) x.SetBytes(publicX) y := new(big.Int) y.SetBytes(publicY) curve := elliptic.P256() shared, _ := curve.ScalarMult(x, y, privKey.D.Bytes()) key := sha256.Sum256(shared.Bytes()) return key[:] } and i already try write in kotlin...

Android Kotlin Is there any way to disable Pending Purchase? We are using Google Play Billing Library 4.0 to sell in-apps consumable purchases. This is the initialization code. BillingClient.newBuilder(this) .enablePendingPurchases() .setListener { _, _ -> } .build() Once I thought it is impossible to disable Pending Purchases in Google Play Billing Library 4.0 because the build can’t go through If I remove enablePendingPurchases(). However, I found another app in which it shows unavailability of Pending Purchase, so I want to know how to...

WebRTC Android failed to display participants videos we are trying to implement multi party webRTC using sockets.The video of participant do not display on the screen. The IP and port of stun and turn server if working absolutely fine. please tell what is wrong with the code MainActivity.kt package com.jmm.brsap.multipartywebrtc import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.util.Log import org.json.JSONObject import org.webrtc.* import org.webrtc.PeerConnection.IceServer import java.lang.Math.log...

retrofit request @Part and @Query in kotlin android I want to send Image as form-data and userId as Params in retrofit android.I have tried many solution but did not got any success. here is my code and api. @Multipart @POST("upload/profile") fun uploadProfilePhoto(@Part image: MultipartBody.Part, @Query("userId") userId: String): Call val photoContent = RequestBody.create(MediaType.parse("image/*"), file) val photo =...

Changing the value in Map I'm studying kotlin. Now I'm solving a problem: if there is a key in the map, then add one, and if there is not, then put 10. I wrote the code, but maybe it can be simplified without using an intermediate variable? val map = mutableMapOf() val value = map["key"] map["key"] = if (value != null) (value.toInt()+1).toString() else "10"

What does Jetpack Compose Modifier.composed do? In official documents defined as Declare a just-in-time composition of a Modifier that will be composed for each element it modifies. composed may be used to implement stateful modifiers that have instance-specific state for each modified element, allowing the same Modifier instance to be safely...

Convert SQL to Spring Data Specification I need some help to convert SQL to Spring Data Specifications, it's a bit weird one: ( select cm.id from chat_room join chat_participant cp on chat_room.id = cp.room join chat_message cm on chat_room.id = cm.room where cp.user = 736671 and chat_room.created > '2021-06-01' and not exists( select * from chat_message cm2 where cm2.room = chat_room.id and cm2.created > cm.created ) ) should comes up to something like this override fun...

Creating a custom drawable Hi I'm trying to create a custom drawable that looks like the vector image (dark blue). I've created a vector drawable for this shape however it's going to be the background of the view who's content changes in terms of height and so the vector drawable is not maintaining its aspect ratio. I'f I create a drawable in XML like the following, it maintains its aspect ratio however I'm not sure how to clip the bottom part to make it match the shape of the vector drawable attached in this...

ClassCastException When Initialising Interface ViewModel Using by navGraphViewModels() [with Hilt] I have a fragment flow scoped with a navigation graph and want to scope my ViewModels accordingly. However, I don't want all the ViewModel instances to have access to all methods and variables, therefore each ViewModel is an interface implemented in the base ViewModel. I am using by navGraphViewModels() delegation in each of the Fragments but it seems to be unable to cast the interface to the base class. The trace error is: java.lang.ClassCastException: java.lang.Object cannot be cast to...

Android ACRA - Bearer Authentication Hello I implemented ACRA error repporting to my project (https://github.com/ACRA/acra) and it works. But I have one problem, is it possible to specify authentication in HTTP Sender other than the basic one? I need to send HTTP request with Bearer authentication. Is it possible somehow with ACRA or should I use something else? Thank you

How to convert API date to string in Kotlin within my recyclerview adapter? I need to convert API date from this (yyyy-MM-dd HHmmss) format to (oct 18) like this @Throws(ParseException::class) private fun getFormate(date: String): String? { val d: Date = SimpleDateFormat("yyyy-MM-dd hhmmss", Locale.ENGLISH).parse(date) //Log.d("Date", String.valueOf(d)); val cal = Calendar.getInstance() cal.time = d return SimpleDateFormat("MMM dd").format(cal.time) } inside of onBindViewHolder val thisModelResponse: ExpiryData =...

I get Failed to connect to /127.0.0.1:50051 at grpc android kotlin app I am trying to make an example app to practice grpc in android with kotlin. I used wire framework for creating kotlin files from proto file and connecting to server. Problem is I get "Failed to connect to /127.0.0.1:50051" error when try to reach to my local grpc server. Tested this server with BloomRPC and works correctly. Here is the screenshot of bloomRPC. Here is my code. val uiScope =...

DatePicker dialog may showing improper date in kotlin Below is the function I am using to diplay date picker dialog in android. private fun openPurchaseDatePickerDialog( yearToDisplay: Int, monthToDisplay: Int, dayToDisplay: Int ) { try { activity?.let { KeyboardUtils.hideKeyboard(it) } val calendar = Calendar.getInstance() val dialog = DatePickerDialog(activity, { _, year, month, day_of_month -> calendar[Calendar.YEAR] = year calendar[Calendar.MONTH] = month...

Compose Layout: Align relative to centered item (eg. toRightOf) Is there a way in Compose to align a composable next to a centered item without using ConstraintLayout? I want to achieve this: I could use a Spacer and Weights like this Row( modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.Center, verticalAlignment = Alignment.CenterVertically, ) {...

Kotlin - setOnclickListener button is not working So the Problem is, I don't know why, but the setOnClickListener is not reacting (Toasting) when I klick it. Testet it several times and just doesn't react. private lateinit var signInButton: Button override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_login) initVariables() addListeners() } private fun initVariables() { signInButton = findViewById(R.id.sign_in_button) } private fun addListeners() {...

Is there a Kotlin "eval" I have a bunch of strings like these Hello $World I say hello to $User, too I was thinking I could somehow let kotlin parse this as a kotlin string, and I'd just have to set the variables World and User to get an evaluated string... How is this possible? Why I want to do this? I used bash's envsubst before, and had to move away from this, since things were getting too complicated. But now I have no easy way to replace strings in a file anymore... Thanks

Converting C to Kotlin Working on a Kotlin Multiplatform project. Need to integrate SQLCipher, which we have done for the Android part, and now I am working on the iOS side. I have built SQLCipher and integrated using c_interop. SQLCipher documentation for Swift says this: var rc: Int32 var db: OpaquePointer? = nil var stmt: OpaquePointer? = nil let password: String = "correct horse battery staple" rc = sqlite3_open("memory", &db) rc = sqlite3_key(db, password, Int32(password.utf8CString.count)) I have done this...