Bundler

Android Intent & Bundle extensions that insert and retrieve values elegantly.

Including in your project

Download Maven Central Jitpack

Gradle

Add below codes to your root build.gradle file (not your module build.gradle file).

allprojects {
    repositories {
        jcenter()
    }
}

And add a dependency code to your module's build.gradle file.

dependencies {
    implementation "com.github.skydoves:bundler:1.0.2"
}

Usage

Intent

intentOf is an expression for creating an Intent using Kotlin DSL style and we can put extras using the putExtra method. Also, we can put extras using the + keyword in front of a key/value pair.

val intent = intentOf {
    putExtra("posterId", poster.id) // put a Long type 'posterId' value.
    putExtra("posterName" to poster.name) // put a String type 'posterName' value.
    putExtra("poster", poster) // put a Parcelable type 'poster' value.

    +("id" to userInfo.id) // put a Long type 'id' value.
    +("name" to userInfo.nickname) // put a String type 'name' value.
    
    -"name" // remove a String type 'name' value.
}

StartActivity

We can start activities using the intentOf expression like below.

intentOf<SecondActivity> {
    putExtra("id" to userInfo.id)
    putExtra("name" to userInfo.nickname)
    putExtra("poster", poster)
    startActivity([email protected])
}

We can also use other options for creating an intent.

intentOf {
    setAction(Intent.ACTION_MAIN)
    addCategory(Intent.CATEGORY_APP_MUSIC)
    setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
    startActivity([email protected])
}

bundle

bundle is an expression for initializing lazily extra values from the intent.

class SecondActivity : AppCompatActivity() {

  private val id: Long by bundle("id", -1) // initializes a Long extra value lazily.
  private val name: String by bundle("name", "") // initializes a String extra value lazily.
  private val poster: Poster? by bundle("poster") // initializes a Parcelable extra value lazily.

  // -- stubs -- //

We can initialize a Parcelable value with a defaut value.

private val poster: Poster? by bundle("poster") { Poster.create() }

Also, we can initialize type of Array and ArrayList using bundleArray and bundleArrayList expression.

// initialize lazily without default values.
private val posterArray by bundleArray<Poster>("posterArray")
private val posterListArray by bundleArrayList<Poster>("posterArrayList")

or

// initialize lazily with default values.
private val posterArray by bundleArray<Poster>("posterArray") { arrayOf() }
private val posterListArray by bundleArrayList<Poster>("posterArrayList") { arrayListOf() }

Fragment

The below example shows setting arguments using the intentOf expression.

arguments = intentOf {
    +("id" to userInfo.id)
    +("name" to userInfo.nickname)
    +("poster" to poster)
}.extras

We can initialize argument values lazily in Fragments using the bundle expression like below.

- val id: Long = arguments?.getLong("id", -1) ?: -1
+ val id: Long by bundle("id", -1)
- val poster: Poster? = arguments?.getParcelable("poster")
+ val poster: Poster? by bundle("poster")

GitHub