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EfficientAdapter

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Create a new adapter for a RecyclerView or ViewPager is now much easier.

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최종 버전 다운로드 (.zip)

- .gitignore
- build.gradle
- gradle.properties
- proguard-rules.pro
- .gitignore
- build.gradle
- proguard-rules.pro
- - gradle-wrapper.jar
  - gradle-wrapper.properties
- bintrayv1.gradle
- installv1.gradle
.gitignore
build.gradle
CHANGELOG.md
gradle.properties
gradlew
gradlew.bat
LICENSE
README.md
settings.gradle

# 설치 가이드

1. 코드 내려받기

git clone https://github.com/StanKocken/EfficientAdapter

깃허브에서 프로젝트 코드 전체를 내 컴퓨터로 내려받습니다.

cd EfficientAdapter

방금 내려받은 프로젝트 폴더 안으로 이동합니다.

2. Gradle (Java/Kotlin)

보통 추천

사전 준비물

Git GitHub에서 프로젝트 코드를 내려받으려면 필요합니다.
JDK (Java) Java/Kotlin 프로젝트를 빌드/실행하려면 필요합니다.
Gradle 레포에 포함된 gradlew(Gradle Wrapper)를 쓰면 Gradle을 따로 설치할 필요가 없습니다.

./gradlew build

Gradle로 빌드를 진행합니다.

✅ BUILD SUCCESSFUL 메시지가 뜨면 성공입니다. build/ 폴더에 결과물이 생성됩니다.

// repository documentation

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# Efficient Adapter for Android

Create a new adapter for a [RecyclerView](https://developer.android.com/jetpack/androidx/releases/recyclerview) or [ViewPager](https://developer.android.com/reference/kotlin/androidx/viewpager/widget/ViewPager) is now much easier.

## Overview

Create a list of elements into a [RecyclerView](https://developer.android.com/jetpack/androidx/releases/recyclerview) or [ViewPager](https://developer.android.com/reference/kotlin/androidx/viewpager/widget/ViewPager) is not that easy for a beginner, and repetitive for others. The goal of this library is to simplify that for you.

## How does it work?

Create a class ViewHolder (`BookViewHolder` for example). The method `updateView` will be call with the object, when an update of your view is require:

public class BookViewHolder extends EfficientViewHolder<Book> {
        public BookViewHolder(View itemView) {  super(itemView); }

@Override
        protected void updateView(Context context, Book object) {
            TextView textView = findViewByIdEfficient(R.id.title_textview);
            textView.setText(object.getTitle());
			// or just
			setText(R.id.title_textview, object.getTitle());
        }
    }

Give this ViewHolder class to the constructor of the adapter (SimpleAdapter) of your [RecyclerView](https://developer.android.com/jetpack/androidx/releases/recyclerview), with the resource id of your item view and the list of objects:

EfficientRecyclerAdapter<Plane> adapter = new EfficientRecyclerAdapter<Plane>(R.layout.item_book, BookViewHolder.class, listOfBooks);
    recyclerView.setAdapter(adapter);

And that's it!

It's also working with a [ViewPager](https://developer.android.com/reference/kotlin/androidx/viewpager/widget/ViewPager):

EfficientPagerAdapter<Plane> adapter = new EfficientPagerAdapter<Plane>(R.layout.item_book, BookViewHolder.class, listOfBooks);
    viewPager.setAdapter(adapter);

## Other features

### Heterogenous list
For a list of different kind of objects, layout, viewholder…

EfficientRecyclerAdapter adapter = new EfficientRecyclerAdapter(generateListObjects()) {
        @Override
        public int getItemViewType(int position) {
            if (get(position) instanceof Plane) {
                return VIEW_TYPE_PLANE;
            } else {
                return VIEW_TYPE_BOOK;
            }
        }

@Override
        public Class<? extends EfficientViewHolder> getViewHolderClass(int viewType) {
            switch (viewType) {
                case VIEW_TYPE_BOOK:
                    return BookViewHolder.class;
                case VIEW_TYPE_PLANE:
                    return PlaneViewHolder.class;
                default:
                    return null;
            }
        }

@Override
        public int getLayoutResId(int viewType) {
            switch (viewType) {
                case VIEW_TYPE_BOOK:
                    return R.layout.item_book;
                case VIEW_TYPE_PLANE:
                    return R.layout.item_plane;
                default:
                    return 0;
            }
        }
    };

### Efficient findViewById()

Because `findViewById(int)` is CPU-consuming (this is why we use the ViewHolder pattern), this library use a `findViewByIdEfficient(int id)` into the ViewHolder class.

You can use it like a `findViewById(int id)` but the view return will be cached to be returned into the next call.

Your view id should be unique into your view hierarchy, but sometimes is not that easy (with an include for example). It's now easier to find a subview by specify the parent of this subview with `findViewByIdEfficient(int parentId, int id)` to say "the view with this id into the parent with this id".

### Let the element be clickable

Your ViewHolder class can override the method `isClickable()` to tell is this element is clickable or not.

By default, the view is clickable if you have a listener on your adapter.

## Proguard

This library includes the proguard configuration file.
If you want to add it manually:

-keepclassmembers public class * extends com.skocken.efficientadapter.lib.viewholder.EfficientViewHolder {
        public <init>(...);
    }

## Gradle

dependencies {
        compile 'com.skocken:efficientadapter:2.4.0'
    }

## Android Support library

If you are still using the deprecated Android Support Library (instead of AndroidX), please use the dependency 2.3.X instead.

## License

* [Apache 2.0](http://www.apache.org/licenses/LICENSE-2.0.html)

## Contributing

Please fork this repository and contribute back using
[pull requests](https://github.com/StanKocken/EfficientAdapter/pulls).

Any contributions, large or small, major features, bug fixes, additional
language translations, unit/integration tests are welcomed and appreciated
but will be thoroughly reviewed and discussed.