Set the position of the view holder as a tag for easy retrieval to emulate getAdapterPosition in ViewHolder

Author: Jawnnypoo

adapterflowlayout/build.gradle

@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.2"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.0"
 
     defaultConfig {
-        minSdkVersion 9
-        targetSdkVersion 24
+        minSdkVersion 15
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }

adapterlayout/build.gradle

@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.2"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.0"
 
     defaultConfig {
-        minSdkVersion 9
-        targetSdkVersion 24
+        minSdkVersion 15
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
@@ -23,7 +23,7 @@ android {
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile 'com.android.support:recyclerview-v7:24.2.1'
+    compile 'com.android.support:recyclerview-v7:25.0.0'
 }
 
 apply from: 'https://raw.githubusercontent.com/Commit451/gradle-android-javadocs/1.0.0/gradle-android-javadocs.gradle'

adapterlayout/src/main/java/com/commit451/adapterlayout/AdapterLayout.java

@@ -0,0 +1,36 @@
+package com.commit451.adapterlayout;
+
+import android.support.v7.widget.RecyclerView;
+
+/**
+ * Provides access to some of the public API of AdapterLayout in a way that will be available for any given
+ * AdapterLayout
+ */
+public class AdapterLayout {
+
+    /**
+     * Get the position in the AdapterLayout of the View holder.
+     * Use this instead of {@link RecyclerView.ViewHolder#getAdapterPosition()}
+     *
+     * @param viewHolder the holder to find the position of
+     * @return the index of the holder, or -1 if not found
+     */
+    public static int getAdapterPosition(RecyclerView.ViewHolder viewHolder) {
+        return getPosition(viewHolder);
+    }
+
+    /**
+     * Get the position in the AdapterLayout of the View holder.
+     * Use this instead of {@link RecyclerView.ViewHolder#getLayoutPosition()}
+     *
+     * @param viewHolder the holder to find the position of
+     * @return the index of the holder, or -1 if not found
+     */
+    public static int getLayoutPosition(RecyclerView.ViewHolder viewHolder) {
+        return getPosition(viewHolder);
+    }
+
+    private static int getPosition(RecyclerView.ViewHolder viewHolder) {
+        return (int) viewHolder.itemView.getTag(R.id.adapter_layout_list_position);
+    }
+}

adapterlayout/src/main/java/com/commit451/adapterlayout/AdapterLayoutDelegate.java

@@ -92,7 +92,6 @@ public void setAdapter(@Nullable RecyclerView.Adapter adapter) {
      *
      * @return the adapter
      */
-    @Nullable
     public RecyclerView.Adapter getAdapter() {
         return mAdapter;
     }
@@ -125,8 +124,10 @@ private void addViewAt(int index) {
 
     private void addViewAt(int viewType, int index) {
         RecyclerView.ViewHolder viewHolder = mAdapter.onCreateViewHolder(mViewGroup, viewType);
+        //setting the lib to min 4.0 to avoid leaks from doing this
         viewHolder.itemView.setTag(R.id.adapter_layout_list_holder, viewHolder);
         viewHolder.itemView.setTag(R.id.adapter_layout_list_view_type, viewType);
+        viewHolder.itemView.setTag(R.id.adapter_layout_list_position, index);
         mViewGroup.addView(viewHolder.itemView);
         mAdapter.onBindViewHolder(viewHolder, index);
     }

adapterlayout/src/main/java/com/commit451/adapterlayout/AdapterLinearLayout.java

@@ -43,7 +43,6 @@ public void setAdapter(RecyclerView.Adapter adapter) {
         mAdapterLayoutDelegate.setAdapter(adapter);
     }
 
-    @Nullable
     public RecyclerView.Adapter getAdapter() {
         if (mAdapterLayoutDelegate != null) {
             return mAdapterLayoutDelegate.getAdapter();

adapterlayout/src/main/res/values/ids.xml

@@ -2,4 +2,5 @@
 <resources>
     <item name="adapter_layout_list_holder" type="id" />
     <item name="adapter_layout_list_view_type" type="id"/>
+    <item name="adapter_layout_list_position" type="id"/>
 </resources>

app/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.2"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.0"
 
     defaultConfig {
         applicationId "com.commit451.adapterlayout.sample"
         minSdkVersion 15
-        targetSdkVersion 24
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
@@ -25,8 +25,8 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:24.2.1'
-    compile 'com.android.support:design:24.2.1'
+    compile 'com.android.support:appcompat-v7:25.0.0'
+    compile 'com.android.support:design:25.0.0'
     compile 'com.jakewharton:butterknife:7.0.1'
     compile project(':adapterlayout')
     compile project(':adapterflowlayout')

app/src/main/java/com/commit451/adapterlayout/sample/CheeseAdapter.java

@@ -4,6 +4,8 @@
 import android.view.View;
 import android.view.ViewGroup;
 
+import com.commit451.adapterlayout.AdapterLayout;
+
 import java.util.ArrayList;
 import java.util.Collection;
 
@@ -14,14 +16,6 @@ public class CheeseAdapter extends RecyclerView.Adapter<CheeseViewHolder> {
 
     private Listener mListener;
     private ArrayList<Cheese> mValues;
-    private final View.OnClickListener mOnClickListener = new View.OnClickListener() {
-        @Override
-        public void onClick(View v) {
-            int position = (int) v.getTag(R.id.list_position);
-            Cheese cheese = getItemAt(position);
-            mListener.onItemClicked(cheese);
-        }
-    };
 
     public CheeseAdapter(Listener listener) {
         mListener = listener;
@@ -73,17 +67,23 @@ public void clear() {
 
     @Override
     public CheeseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
-        CheeseViewHolder holder = CheeseViewHolder.inflate(parent);
-        holder.itemView.setOnClickListener(mOnClickListener);
+        final CheeseViewHolder holder = CheeseViewHolder.inflate(parent);
+        holder.itemView.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //Takes the place of holder.getAdapterPosition()
+                int position = AdapterLayout.getAdapterPosition(holder);
+                Cheese cheese = getItemAt(position);
+                mListener.onItemClicked(cheese);
+            }
+        });
         return holder;
     }
 
     @Override
     public void onBindViewHolder(final CheeseViewHolder holder, int position) {
         Cheese cheese = getItemAt(position);
         holder.bind(cheese);
-        holder.itemView.setTag(R.id.list_position, position);
-        holder.itemView.setTag(R.id.list_holder, holder);
     }
 
     @Override

app/src/main/res/values/ids.xml

@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.0'
+        classpath 'com.android.tools.build:gradle:2.2.2'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
         classpath 'com.github.ben-manes:gradle-versions-plugin:0.13.0'