-
-
Save mcxiaoke/f6eb2eb8049d1cfc352a to your computer and use it in GitHub Desktop.
How to use Parcelable in Kotlin v1.0.0-beta-4589
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Inline function to create Parcel Creator | |
| inline fun <reified T : Parcelable> createParcel(crossinline createFromParcel: (Parcel) -> T?): Parcelable.Creator<T> = | |
| object : Parcelable.Creator<T> { | |
| override fun createFromParcel(source: Parcel): T? = createFromParcel(source) | |
| override fun newArray(size: Int): Array<out T?> = arrayOfNulls(size) | |
| } | |
| // custom readParcelable to avoid reflection | |
| fun <T : Parcelable> Parcel.readParcelable(creator: Parcelable.Creator<T>): T? { | |
| if (readString() != null) return creator.createFromParcel(this) else return null | |
| } | |
| // EXAMPLE with custom classes | |
| data class User( | |
| var _id: String? = null, | |
| var email: String? = null, | |
| var name: Name? = null, | |
| var phone: String? = null, | |
| var additional: Additional? = null | |
| ) : Parcelable { | |
| protected constructor(parcelIn: Parcel) : this() { | |
| this._id = parcelIn.readString() | |
| this.email = parcelIn.readString() | |
| this.name = parcelIn.readParcelable(Name.CREATOR) | |
| this.phone = parcelIn.readString() | |
| this.additional = parcelIn.readParcelable(Additional.CREATOR) | |
| } | |
| override fun describeContents(): Int { | |
| return 0 | |
| } | |
| override fun writeToParcel(dest: Parcel, flags: Int) { | |
| dest.writeString(_id) | |
| dest.writeString(email) | |
| dest.writeParcelable(name, 0) | |
| dest.writeString(phone) | |
| dest.writeParcelable(additional, 0) | |
| } | |
| companion object { | |
| val CREATOR = createParcel { User(it) } | |
| } | |
| } | |
| data class Name( | |
| var first: String? = null, | |
| var last: String? = null | |
| ) : Parcelable { | |
| protected constructor(parcelIn: Parcel) : this() { | |
| this.first = parcelIn.readString() | |
| this.last = parcelIn.readString() | |
| } | |
| override fun describeContents(): Int { | |
| return 0 | |
| } | |
| override fun writeToParcel(dest: Parcel, flags: Int) { | |
| dest.writeString(first) | |
| dest.writeString(last) | |
| } | |
| companion object { | |
| val CREATOR = createParcel { Name(it) } | |
| } | |
| } | |
| data class Additional( | |
| var licensePlate: String? = null | |
| ) : Parcelable { | |
| protected constructor(parcelIn: Parcel) : this() { | |
| this.licensePlate = parcelIn.readString() | |
| } | |
| override fun writeToParcel(dest: Parcel, flags: Int) { | |
| dest.writeString(this.licensePlate) | |
| } | |
| override fun describeContents(): Int { | |
| return 0 | |
| } | |
| companion object { | |
| val CREATOR = createParcel { Additional(it) } | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment