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6 min readTo return a boolean when using coroutines in Kotlin, you can use a standard approach with the suspend keyword in your function signature. You can define a suspend function that performs a certain task and returns a boolean value based on the result of that task. Within the function, you can use coroutine builders such as async or launch to achieve asynchronous operation.
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5 min readTo make an HTTP request within onCreate in Kotlin, you can use libraries such as Retrofit or Volley.First, you need to add the necessary dependencies for the library you choose in your build.gradle file. Then, you can create an instance of the HTTP client and make a request to the desired endpoint.For example, with Retrofit, you would define an interface with the HTTP methods you want to use and create a Retrofit object with the base URL.
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7 min readTo make dependent input fields in Kotlin, you can use methods like addTextChangedListener() on your EditText fields to listen for changes in the input. By doing this, you can set up logic to update other input fields based on the changes in the dependent field. You can also use observers or data binding to keep track of the values in the input fields and update them accordingly.
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4 min readTo justify text in a TextView in Kotlin, you can use the gravity property and set it to Gravity.CENTER. This will center the text horizontally within the TextView. Alternatively, you can use the textAlign property and set it to center. Both of these approaches will justify the text in the TextView to the center.[rating:f8e7b244-16c9-4deb-b39c-cdcab74f465d]What is the impact of text justification on text wrapping in a TextView in Kotlin.
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4 min readTo create a custom method for the by operator in Kotlin, you need to define a class that implements the ReadOnlyProperty interface. This interface has a single method getValue() which will be called by the by operator to get the value of the property. Inside the getValue() method, you can return any custom logic to calculate the value of the property.Here is an example of how to create a custom method for the by operator in Kotlin: import kotlin.properties.ReadOnlyProperty import kotlin.reflect.
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4 min readTo disable compose reloading in Kotlin, you can remove the recompose function that triggers the recomposition of the UI elements. Instead, you can manually trigger recomposition only when needed by using the Modifier.recompose function. This way, you have more control over when the UI elements are recomposed, allowing you to optimize performance and avoid unnecessary re-renders of the UI.
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5 min readTo convert a string to JSON in Kotlin, you can use the JSONObject class from the org.json package. Simply create a new JSONObject instance passing the string as a parameter, and then you can access the JSON properties using the appropriate methods provided by the JSONObject class. Remember to handle any exceptions that may occur during the conversion process.[rating:f8e7b244-16c9-4deb-b39c-cdcab74f465d]How to create a JSON object from a string in Kotlin.
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5 min readTo parse a timestamp from Firestore to Kotlin, you can retrieve the timestamp data from Firestore as a Timestamp object. Once you have this object, you can convert it to a Long Unix timestamp using the toDate().time method. This will give you the milliseconds since epoch timestamp that you can then use in your Kotlin code as needed.Here is an example of how you can parse a timestamp from Firestore to Kotlin: // Assuming you have a Firestore document snapshot val timestamp = documentSnapshot.
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7 min readTo read properties as immutable strings in Kotlin, you can use the val keyword to declare the property as read-only. This means that the property can only be initialized once and cannot be changed afterwards.For example, you can declare a read-only property like this: val name: String = "Hello" In this case, the name property is of type String and is initialized with the value "Hello". Since it is declared with the val keyword, it cannot be reassigned to a different value.
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5 min readIn Kotlin, giving context to a fragment involves providing the necessary information and environment for the fragment to properly function within an activity. This can be done by passing arguments to the fragment using a bundle, setting up the fragment's view within the activity layout, and managing the fragment's lifecycle within the activity.One common way to give context to a fragment is by passing arguments through a bundle when creating an instance of the fragment.
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4 min readTo parse a JSON array in Kotlin, you can use the built-in library called "org.json" or a third-party library like Gson or Jackson. You can start by creating a JSON array object from the string representation of your JSON data. Once you have the JSON array object, you can iterate through its elements using a for loop or a forEach loop. You can then access and extract the values of each element using the appropriate methods provided by the library you are using.