RecyclerView Adapter Library with different models and different layouts as convenient as possible.

Jan Rabe

Last update: Dec 26, 2022

Related tags

Kotlin adapter recyclerview mvvm android-library update sort

Overview

RecyclerView Presenter

Convenience library to handle different view types with different presenters in a single RecyclerView.

How to install

repositories {
    maven {
	url "https://jitpack.io"
    }
}

dependencies {
    implementation 'com.github.kibotu:RecyclerViewPresenter:-SNAPSHOT'
}

How to use

Create a presenter, e.g. PhotoPresenter or LabelPresenter

class LabelPresenter : Presenter<String>(R.layout.label_presenter_item) {

    private val View.label: TextView
        get() = findViewById(R.id.label)

    override fun bindViewHolder(viewHolder: RecyclerView.ViewHolder, item: PresenterViewModel<String>, payloads: MutableList<Any>?) = with(viewHolder.itemView) {
        logv { "bindViewHolder ${viewHolder.adapterPosition} $item payload=$payloads" }
        label.text = "${item.model}"
    }
}

Add the PresenterAdapter to your RecyclerView

val adapter = PresenterAdapter()
list.adapter = adapter

adapter.registerPresenter(PhotoPresenter())
adapter.registerPresenter(LabelPresenter())
adapter.registerPresenter(NumberPresenter())

Submit list of models with presenter matching layout to the adapter, e.g.:

val items = mutableListOf<PresenterViewModel<*>>()

for (i in 0..99) {
    items.add(PresenterModel(createRandomImageUrl(), R.layout.photo_presenter_item))
    items.add(PresenterModel(createRandomImageUrl(), R.layout.label_presenter_item))
    items.add(PresenterModel(createRandomImageUrl(), R.layout.number_presenter_item))
}

adapter.submitList(items)

5.1 Add click listener to adapter

adapter.onItemClick { item, view, position ->
    snack("$position. ${item.model}")
}

5.2 or pass to your RecyclerViewModel

val item = PresenterViewModel(createRandomImageUrl(), R.layout.photo_presenter_item) { item, view, position -> 
	snack("$position. $item")
})

Updating item

adapter.submitList(newItems)

Circular

adapter.isCircular = true

// Note: use adapter scroll methods for correct scroll position when using circular
adapter.smoothScrollToPosition(0)
adapter.scrollToPosition(0)

Notes

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Let me know what you think: [email protected]

Contributions welcome!

License

Copyright 2021 Jan Rabe

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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Comments

Issue #2. ViewBinding support

What are your thoughts on these changes? It works fine, but refactoring of all presentation classes should be required after upgrade.

Please add #hacktoberfest-accepted, if you want to merge :)

opened by dionep 1