MagicAdapter

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This is a super lightweight tool library that can quickly implement recycleview complex adapters.

Feature

• Based on Kotlin
• Based on Databinding
• No longer need to maintain adapter, there is only one MagicAdapter globally
• No longer need to maintain viewholder
• Support multiple item view types
• Provide some basic callbacks
• Easily expand headers and footers
• Easily expand recycleview animation and events
• No reflection, high efficiency
• Super lightweight, less than 34 KB

Setup

1. Add jcenter repository to root's build.gradle

allprojects {
    repositories {
        ...
        jcenter()
    }
}

2. Turn on databinding in app's build.gradle

android {
    ...
    dataBinding {
        enabled = true
    }
}

3. Add dependencies in app's build.gradle (please use the latest version)

dependencies {
    ...
    implementation 'com.xuyefeng:magicadapter:1.0.3'
}

Usage

1. Create a RecycleView item layout file image_item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>

        <variable
            name="item"
            type="com.blue.helloadapter.ImageItem" />
    </data>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp">

        <ImageView
            android:id="@+id/iv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true" />
    </RelativeLayout>
</layout>

Please note that the name of the XXXItem declared here must be item

---

2. Create a XXXItem corresponding to the item layout file, such ad ImageItem

class ImageItem(
        val resId: Int
) : BaseItem() {

    override fun getLayout(): Int = R.layout.image_item_layout

    override fun onBinding(holder: ItemViewHolder) {
        (binding as ImageItemLayoutBinding).apply {
            iv.setImageResource(resId)
            iv.setOnClickListener {
                Toast.makeText(iv.context, "click image on ${holder.adapterPosition}", Toast.LENGTH_SHORT).show()
            }
        }
    }
}

Here is a description of the BaseItem:

• Can get the Adapter of RecycleView binding
• Can get the ViewHolder corresponding to item
• Can get the Databinding corresponding to item

---

3. Create a TextItem and a ButtonItem in the same way, and then you can add data.

val adapter = MagicAdapter()
adapter.addItem(ImageItem(R.drawable.s1))
adapter.addItem(TextItem())
adapter.addItem(ButtonItem())
recyclerView.adapter = adapter

---

4. If you need a callback, you can do it like this

adapter.itemClick = {
    val position = it.adapterPosition
    val item = it.item
    val binding = it.binding
    ...
}
adapter.itemLongClick = {
    ...
}
adapter.viewAttached = {
    ...
}
adapter.viewDetached = {
    ...
}

It's over here, adding a complex adapter to a recycleview can be as simple as that.

License

Apache-2.0