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Overview

The Space Flight News app provides several Kotlin extension functions to simplify common Android operations. These extensions enhance readability and reduce boilerplate code. Package: com.bsvillarraga.spaceflightnews.core.extensions

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Context Extensions

Source: ContextExtensions.kt

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isPermissionGranted

Checks if a specific permission is granted. 
fun Context.isPermissionGranted(permission: String): Boolean
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permission
String
required
The permission string to check (e.g., Manifest.permission.CAMERA)
Returns: true if the permission is granted, false otherwise Example: 
if (context.isPermissionGranted(Manifest.permission.POST_NOTIFICATIONS)) {
    // Send notification
}

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Date Extensions

Source: DateExtensions.kt

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toFormattedDate

Converts an ISO 8601 date string to a human-readable format. 
fun String.toFormattedDate(): String
Input Format: yyyy-MM-dd'T'HH:mm:ss'Z' (ISO 8601 UTC) Output Format: dd/MM/yyyy hh:mm a (e.g., “04/03/2026 02:30 PM”) Returns: Formatted date string, or the original string if parsing fails Example: 
val isoDate = "2026-03-04T14:30:00Z"
val formattedDate = isoDate.toFormattedDate()
// Result: "04/03/2026 02:30 PM"

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Image Extensions

Source: ImageExtensions.kt

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toResourceGlide

Loads an image from a local resource using Glide. Supports both regular images and GIFs. 
fun ImageView.toResourceGlide(context: Context, image: Int)
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context
Context
required
Android context for Glide
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image
Int
required
Resource ID of the image (e.g., R.drawable.placeholder)
Example: 
imageView.toResourceGlide(context, R.drawable.loading_animation)

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toNetworkGlide

Loads an image from a URL using Glide. 
fun ImageView.toNetworkGlide(context: Context, image: String)
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context
Context
required
Android context for Glide
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image
String
required
URL of the image to load
Example: 
imageView.toNetworkGlide(context, article.imageUrl)

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RecyclerView Extensions

Source: RecyclerViewExtensions.kt

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init

Initializes a RecyclerView with a LinearLayoutManager and adapter. 
fun RecyclerView.init(adapter: RecyclerView.Adapter<*>, context: Context)
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adapter
RecyclerView.Adapter<*>
required
The adapter to set on the RecyclerView
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context
Context
required
Context for creating the LinearLayoutManager
Example: 
recyclerView.init(articlesAdapter, context)

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onLoadMoreScrollListener

Adds a scroll listener that triggers pagination when the user scrolls to the bottom. 
fun RecyclerView.onLoadMoreScrollListener(loadMore: () -> Unit)
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loadMore
() -> Unit
required
Callback function invoked when the user reaches the bottom of the list
Example: 
recyclerView.onLoadMoreScrollListener {
    viewModel.loadNextPage()
}

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SearchView Extensions

Source: SearchViewExtensions.kt

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queryTextListener

Configures a SearchView with callbacks for query submission and text changes. 
fun SearchView.queryTextListener(
    onSubmit: (String) -> Unit, 
    onTextChanged: (String?) -> Unit
)
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onSubmit
(String) -> Unit
required
Callback invoked when the user submits a search query
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onTextChanged
(String?) -> Unit
required
Callback invoked when the search text is cleared (empty or null)
Example: 
searchView.queryTextListener(
    onSubmit = { query ->
        viewModel.searchArticles(query)
    },
    onTextChanged = { query ->
        if (query.isNullOrEmpty()) {
            viewModel.clearSearch()
        }
    }
)

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Dependencies

These extensions use the following libraries:
  • Glide - Image loading (for Image extensions)
  • AndroidX - Core Android libraries
  • RecyclerView - List components

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