Reusing adapters with concatenating models (example)

delegateadapter/src/main/java/com/livermor/delegateadapter/delegate/KDelegateAdapter.kt

@@ -6,8 +6,7 @@ import kotlinx.android.extensions.LayoutContainer
 /**
  * @author dumchev on 04.11.17.
  */
-abstract class KDelegateAdapter<T>
-    : BaseDelegateAdapter<KDelegateAdapter.KViewHolder, T>() {
+abstract class KDelegateAdapter<T> : BaseDelegateAdapter<KDelegateAdapter.KViewHolder, T>() {
 
     open fun onCreated(view: View) = Unit
 

example/src/main/java/com/livermor/dumchev/delegateadapters/base/KotlinBaseExampleActivity.kt

@@ -6,6 +6,7 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.livermor.delegateadapter.delegate.diff.DiffUtilCompositeAdapter
 import com.livermor.dumchev.delegateadapters.base.adapter.CheckDelegateAdapter
+import com.livermor.dumchev.delegateadapters.base.adapter.ConcatenatingAdapter
 import com.livermor.dumchev.delegateadapters.base.adapter.GenerateItemsDelegateAdapter
 import com.livermor.dumchev.delegateadapters.base.adapter.TextDelegateAdapter
 import kotlinx.android.synthetic.main.activity_base_example.*
@@ -17,6 +18,7 @@ class KotlinBaseExampleActivity : AppCompatActivity() {
                 .add(GenerateItemsDelegateAdapter { generateNewData() })
                 .add(TextDelegateAdapter())
                 .add(CheckDelegateAdapter())
+                .add(ConcatenatingAdapter(View.OnClickListener { generateNewData() }))
                 .build()
     }
 

example/src/main/java/com/livermor/dumchev/delegateadapters/base/MockDataFactory.java

@@ -3,6 +3,7 @@
 import com.livermor.delegateadapter.delegate.diff.DiffUtilItem;
 import com.livermor.dumchev.delegateadapters.R;
 import com.livermor.dumchev.delegateadapters.base.model.CheckItem;
+import com.livermor.dumchev.delegateadapters.base.model.ConcatenetedModel;
 import com.livermor.dumchev.delegateadapters.base.model.ImageItem;
 import com.livermor.dumchev.delegateadapters.base.model.TextItem;
 
@@ -22,13 +23,18 @@ static List<DiffUtilItem> prepareData() {
         Random random = new Random();
         for (int i = 0; i < SIZE; i++) {
             DiffUtilItem item;
-            int type = random.nextInt(3);
+            int type = random.nextInt(4);
             if (type == 0) {
                 item = new TextItem("Title " + i, "Description " + i);
             } else if (type == 1) {
                 item = new ImageItem("Title " + i, R.mipmap.ic_launcher_round);
-            } else {
+            } else if (type == 2) {
                 item = new CheckItem("You still love this lib", true);
+            } else {
+                item = new ConcatenetedModel(
+                    new ImageItem("Title " + i, R.mipmap.ic_launcher_round),
+                    new TextItem("Title " + i, "Description " + i)
+                );
             }
             objects.add(item);
         }

example/src/main/java/com/livermor/dumchev/delegateadapters/base/adapter/ConcatenatingAdapter.kt

@@ -0,0 +1,24 @@
+package com.livermor.dumchev.delegateadapters.base.adapter
+
+import android.view.View
+import com.livermor.delegateadapter.delegate.KDelegateAdapter
+import com.livermor.dumchev.delegateadapters.R
+import com.livermor.dumchev.delegateadapters.base.model.ConcatenetedModel
+
+/**
+ * @author dumchev on 11/12/2018.
+ */
+class ConcatenatingAdapter(clicks: View.OnClickListener) : KDelegateAdapter<ConcatenetedModel>() {
+
+    private val textDelegateAdapter by lazy { TxtDelegateAdapter() }
+    private val imageDelegateAdapter by lazy { ImageDelegateAdapter(clicks) }
+
+    override fun KViewHolder.onBind(item: ConcatenetedModel) {
+        with(textDelegateAdapter) { onBind(item.textViewModel) }
+        with(imageDelegateAdapter) { onBind(item.imageViewModel) }
+    }
+
+    override fun getLayoutId(): Int = R.layout.composite_item
+
+    override fun isForViewType(item: Any): Boolean = item is ConcatenetedModel
+}

example/src/main/java/com/livermor/dumchev/delegateadapters/base/model/ConcatenetedModel.kt

@@ -0,0 +1,13 @@
+package com.livermor.dumchev.delegateadapters.base.model
+
+import com.livermor.delegateadapter.delegate.diff.KDiffUtilItem
+
+/**
+ * @author dumchev on 11/12/2018.
+ */
+data class ConcatenetedModel(
+    val imageViewModel: ImageItem,
+    val textViewModel: TextItem
+) : KDiffUtilItem {
+    override val id: Any = "" + imageViewModel.id() + textViewModel.id()
+}

example/src/main/res/layout/composite_item.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="wrap_content"
+              android:background="@color/yellowBg"
+              android:orientation="vertical">
+
+    <include layout="@layout/image_item"/>
+
+    <include layout="@layout/text_item"/>
+
+</LinearLayout>

example/src/main/res/values/colors.xml

@@ -3,4 +3,5 @@
     <color name="colorPrimary">#3F51B5</color>
     <color name="colorPrimaryDark">#303F9F</color>
     <color name="colorAccent">#FF4081</color>
+    <color name="yellowBg">#fffdb9</color>
 </resources>