Posts (page 237)
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8 min readTo consume an infinite stream in Kotlin, you can use a combination of a while loop, lazy evaluation, and sequences.
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9 min readTo read a large JSON file with Kotlin, you can follow these steps:Import the required libraries: To parse JSON, you need to include the kotlinx.serialization library in your project. Add the following dependency to your build.gradle file: implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.2.0" Define a data class: Create a Kotlin data class that matches the structure of your JSON data. Include all the properties that you want to extract from the JSON. import kotlinx.
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8 min readTo set up a callback from a service to an activity in Kotlin, you can follow these steps:Define an interface: Create an interface in your activity file that will define the callback functions. For example: interface MyCallback { fun onResult(result: String) } Implement the interface in the activity: In your activity file, implement the interface defined above and override the callback functions.
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7 min readIn Kotlin, there are multiple ways to persist a login token, which is used for maintaining user sessions and authentication purposes. Here are some common approaches:SharedPreferences: This is the simplest way to store small amounts of data. Using SharedPreferences, you can save the login token as a key-value pair in the device's local storage. File storage: Kotlin provides file system APIs to read and write data from specific files.
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6 min readTo create a list of available currencies in Kotlin, you can make use of the Currency class provided by the Java platform. Here is an outline of the steps involved:Import the necessary class: import java.util.Currency Get the list of available currencies: val availableCurrencies: Set<Currency> = Currency.
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5 min readTo get the path to a folder using Kotlin, you can utilize the java.nio.file package. Here's how you can achieve it:Import the required package at the top of your Kotlin file: import java.nio.file.Paths Use the Paths.get() method to obtain a Path object representing the folder's path. Provide the desired folder's name or its parent directory, if applicable: val folderPath = Paths.get("/path/to/folder") Replace "/path/to/folder" with the actual path to your folder.
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5 min readTo edit nested JSON in Kotlin, you can follow these steps:Import the necessary packages: In your Kotlin file, import the appropriate packages to work with JSON data. Usually, the org.json package is used. import org.json.JSONArray import org.json.JSONObject Access the JSON data: First, you need to access the JSON data in your code. You can either read it from a file, API response, or create it programmatically.
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4 min readIn Kotlin, you can set the visibility of a button, or any other View, by using the visibility property. The visibility property accepts three constants: View.VISIBLE, View.INVISIBLE, and View.GONE.View.VISIBLE makes the button visible and takes up space in the layout.View.INVISIBLE hides the button, but it still occupies space in the layout.View.GONE hides the button and also removes it from the layout, so it does not take up any space.
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5 min readIn Kotlin Android, you can convert a base64 string into an image using the following steps:Import the required classes for decoding the base64 string and handling bitmap images: import android.graphics.Bitmap import android.graphics.BitmapFactory import android.util.Base64 Create a function to convert the base64 string to a bitmap image: fun getBitmapFromBase64(base64String: String): Bitmap { // Decode the base64 string into byte array val decodedBytes = Base64.
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7 min readTo get HTML content from a WebView in Kotlin, you can follow the steps below:Get a reference to the WebView in your Kotlin code. Make sure you have initialized and loaded the desired HTML content in the WebView. val webView: WebView = findViewById(R.id.webView) To retrieve the HTML content from the WebView, you can use the evaluateJavascript method and a callback interface. This method executes a JavaScript function on the WebView and returns the result to the callback. webView.
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10 min readSecure cookie attributes are used to enhance the security of HTTP cookies in an HTTPS environment. When implementing these attributes, you need to consider the following:Secure flag: This attribute ensures that the cookie is only transmitted over secure connections (HTTPS) and not over unencrypted HTTP. By setting the secure flag, the cookie will only be sent back to the server when the connection is secure, preventing potential interception of sensitive information.
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7 min readIn Kotlin, creating a generic adapter involves creating a class that extends the RecyclerView.Adapter class and uses generics to accommodate different data types. Here's an overview of the steps involved:Import the necessary Kotlin and Android libraries: import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import androidx.recyclerview.widget.RecyclerView Create a generic class that extends RecyclerView.Adapter.