kotlin

问题 I have created a library, in it I have a room database with one Table OfflineData . I listen to new rows inserted in the OfflineData table. I also listen to changes happening in the network connection. I want to combine them both. what I want to listen to a function which returns list of from the table when when there is new row inserted and has internet connection whet the connection comes back on and there is data in the OfflineData table. OfflineDatabaseManager - I have getOfflineData()

问题 I'm trying to include a single source file for the Main-Class of a jar -- actually I have a toplevel directory of such files, demo/ , but I don't want them all in a jar. I want separate jars, each using only one of these. This seems like sort of an anti-pattern in gradle, as the fundamental mechanism infers or prefers that I should instead place each in a distinct sourceSet . Ugh. A casual reading of the docs implies Jar.from() might be useful this way: "Specifies the source files or

问题 This question already has an answer here : How to replace multiple substring of a string at one time? (1 answer) Closed 14 days ago . I have a string that comes from user: Below is an exact example var message = "You purchased $name on $date" Am within a Firebase Listener where variable querySnapshot is carrying data, how can looop through message and replace every occurence of $ to take the variable immediately after $ eg date and make the message be like below message = "You purchased +

问题 I am previewing camera feed to texture view using cameraX. How to draw a rectangle on the screen using coordinates that i have? I don't want a complex function. I simply want to draw a rectangle. I am using kotlin and android studio 4.0. 回答1: I would go for an ImageView overlapping on top of the Textureview at the same xml. This imageview will load a transparent bitmap that will have only the rectangle drawn. If you have the coordinates u have to do: val myRectPaint = Paint() myRectPaint

问题 I'm making an login page.What i have done is--> 1.When user typed right login details -->it will take him to next successful home page 2.When user typed wrong login details-->displayed an error response from API that email or password is wrong try again later.. So basically what I want is--> When user forgot to fill field like email or password, it should give response from API like "data is missing". Here is my json: { "status": 400, "message": "Data missing.", "user_msg": "Data missing" }

问题 I'm initializing a recyclerView using a room local database but it's taking too much time. The recycler view is in a view pager and it takes a lot of time to load. It also blocks the page and avoids the user to click on the other widgets of the view while loading. Is there a way to avoid it to block the application and to make to loading faster? cashflows.apply { layoutManager = LinearLayoutManager(requireContext()) setHasFixedSize(true) itemsOM = mutableListOf<TransactionItem>() if (

问题 The bounty expires in 5 days . Answers to this question are eligible for a +300 reputation bounty. BioGeek wants to draw more attention to this question. A previous answer provides code for reading the quantization tables of jpeg files in Java. However it uses javax.imageio.ImageIO which, according to this answer, isn't available on the Android platform. How can I read read the quantization tables of jpeg files on Android in Kotlin or the Java subset available on Android? edit I have found

问题 I have a mutableMap, val invoiceAdditionalAttribute = mutableMapOf<String, Any?>() invoiceAdditionalAttribute.put("clinetId",12345) invoiceAdditionalAttribute.put("clientName", "digital") invoiceAdditionalAttribute.put("payload", "xyz") I want to convert it into json string the output should be, "{\"clinetId\"=\"12345\", \"clientName\"=\"digital\", \"payload\"=\"xyz\"}" Currently, I am using Gson library, val json = gson.toJson(invoiceAdditionalAttribute) and the output is {"clinetId":12345,

问题 I have been using data binding for the past few weeks and now am trying to use a two way data binding for a custom view with a 'value' attribute. My problem is that I get the following error when building. Cannot find a getter for <com.twisthenry8gmail.dragline.DraglineView app:value> that accepts parameter type 'long' Now it was my understanding that the binding library will automatically use my public setters and getters however the most confusing part is adding a redundant inverse binding

问题 I have a basic work manager class BackgroundSyncWorker ( appContext: Context, workerParams: WorkerParameters ): Worker(appContext, workerParams) { override fun doWork(): Result { return Result.success() } } And I want to inject my repository into this to do some work in my database. I've set Koin up correctly but can't seem to find a way of how to inject my dependency into the Worker. I've tried inheriting the KoinComponent and trying to do it using that, but by inject() doesn't exist, but