Posts (page 47)
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5 min readTo have two radio buttons side by side in Kotlin, you can create a RadioGroup view in your layout XML file and then add two RadioButton views inside it. Set the orientation of the RadioGroup to horizontal to display the radio buttons next to each other. You can customize the appearance and behavior of the radio buttons by setting attributes like text, id, and checked state in your Kotlin code. By doing this, you can have two radio buttons side by side in your Kotlin app.
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6 min readIn Kotlin, you can print the exception message using the "printStackTrace()" method. This method is available on the Throwable class, which is the superclass of all exceptions in Kotlin. By calling the "printStackTrace()" method on the caught exception, you can print the exception message along with the stack trace to the standard error output. This can be helpful for debugging and troubleshooting your code.
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6 min readTo save data in a service class in Kotlin, you can create variables within the service class that hold the data you want to save. These variables can have either a private or public visibility modifier, depending on whether you want them to be accessible from outside the service class.You can then update these variables with the data you want to save whenever needed, and retrieve them when required.
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4 min readTo get the selected index from a list in Kotlin, you can use the indexOf method on the list. This method takes in the element you are looking for and returns its index in the list. You can then store this index in a variable for further use in your code. For example: val myList = listOf("apple", "banana", "cherry") val selectedElement = "banana" val selectedIndex = myList.
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5 min readIn a Kotlin coroutine, a thread refers to a sequence of instructions that can be executed independently. Each coroutine can run on a specific thread, which allows multiple coroutines to run concurrently in a single application.Threads in Kotlin coroutines are lightweight, meaning that they are not operating system level threads. Instead, coroutines manage their own execution flow and can suspend and resume their execution without blocking the entire application.
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7 min readTo import a text file from Firebase into a Kotlin app, you can use the Firebase Realtime Database or Firebase Storage to store and retrieve the text file. First, set up Firebase in your Kotlin app by adding the Firebase SDK and configuring it with your Firebase project credentials. Then, you can use Firebase's APIs to upload the text file to Firebase Storage or save the text file data to the Firebase Realtime Database as a string.
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5 min readTo scrape a simple text in Kotlin, you typically need to use a library such as Jsoup, which is a popular HTML parsing library for Java and Kotlin.Here are the steps to scrape a simple text using Jsoup in Kotlin:Add the Jsoup library to your Kotlin project. You can do this by adding the following dependency to your build.gradle file: dependencies { implementation 'org.jsoup:jsoup:1.13.1' } Use Jsoup to connect to the webpage from which you want to scrape the text: import org.jsoup.
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2 min readIn Kotlin, we use ::class.java to get the java.lang.Class object of a class or type. This is commonly used in scenarios where we need to reflect on the class itself, such as when working with libraries that require passing class objects as parameters, or when using Java-based APIs that expect class objects. By using ::class.java, we can obtain the necessary Class object to interact with the underlying Java components effectively.
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3 min readTo convert an enum from another enum in Kotlin, you can simply create a function that takes the value of the original enum as a parameter and returns the equivalent value of the target enum. You can achieve this by using when expressions to map each value of the original enum to the corresponding value of the target enum. This way, you can easily convert an enum from one type to another in Kotlin.
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4 min readTo initialize a nxm List<List<String>> matrix in Kotlin, you can use the listOf function to create a list of lists. Each inner list represents a row in the matrix, and the outer list contains all the rows. You can also use nested loops to populate the matrix with values.[rating:f8e7b244-16c9-4deb-b39c-cdcab74f465d]What is the format of a nxm list matrix in Kotlin?In Kotlin, a nxm list matrix can be represented as a list of lists. Each inner list represents a row in the matrix.
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6 min readTo parse only certain parts of a JSON file in Kotlin, you can use a library like Gson or Jackson to convert the JSON string into a data class object. Then, you can access only the parts of the data that you are interested in by navigating through the object structure. This allows you to extract the specific information you need from the JSON file without having to parse the entire file.[rating:f8e7b244-16c9-4deb-b39c-cdcab74f465d]What is the role of JSON parsing in web development using Kotlin.
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5 min readTo track celestial objects with a telescope, you first need to align your telescope properly. This involves setting up the telescope and pointing it towards a known reference point in the sky. Once the telescope is aligned, you can start tracking celestial objects by adjusting the telescope's position and movement controls to keep the object in view. This may involve making small adjustments to the telescope's direction and angle as the object moves across the sky.