Minor refactoring

app/src/main/java/com/paktalin/vocabularynotebook/VocabularyAdapter.java

-package com.paktalin.vocabularynotebook;
-
-import android.support.annotation.NonNull;
-import android.support.v7.widget.RecyclerView;
-import android.util.Log;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.TextView;
-
-import com.paktalin.vocabularynotebook.pojo.WordItemPojo;
-
-import java.util.List;
-
-public class VocabularyAdapter extends RecyclerView.Adapter<VocabularyAdapter.ViewHolder> {
-    private static final String TAG = "VN/" + VocabularyAdapter.class.getSimpleName();
-    private List<WordItemPojo> wordItems;
-
-    public VocabularyAdapter(List<WordItemPojo> wordItems) {
-        this.wordItems = wordItems;
-        Log.d(TAG, "wordItems: " + wordItems);
-    }
-
-    @NonNull
-    @Override
-    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
-        View view = LayoutInflater.from(parent.getContext())
-                .inflate(R.layout.list_item, parent, false);
-        return new ViewHolder(view);
-    }
-
-    @Override
-    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
-        WordItemPojo item = wordItems.get(position);
-        Log.d(TAG, "bind item: " + item);
-        holder.tvWord.setText(item.getWord());
-        holder.tvTranslation.setText(item.getTranslation());
-    }
-
-    @Override
-    public int getItemCount() {
-        return wordItems.size();
-    }
-
-    class ViewHolder extends RecyclerView.ViewHolder {
-        TextView tvWord, tvTranslation;
-
-        ViewHolder(View itemView) {
-            super(itemView);
-            tvWord = itemView.findViewById(R.id.tvWord);
-            tvTranslation = itemView.findViewById(R.id.tvTranslation);
-        }
-    }
-}

app/src/main/java/com/paktalin/vocabularynotebook/VocabularyAdapter.kt

+package com.paktalin.vocabularynotebook
+
+import android.support.v7.widget.RecyclerView
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.TextView
+
+import com.paktalin.vocabularynotebook.pojo.WordItemPojo
+
+class VocabularyAdapter(private val wordItems: List<WordItemPojo>) : RecyclerView.Adapter<VocabularyAdapter.ViewHolder>() {
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val view = LayoutInflater.from(parent.context)
+                .inflate(R.layout.word_item, parent, false)
+        return ViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val item = wordItems[position]
+        holder.tvWord.text = item.word
+        holder.tvTranslation.text = item.translation
+    }
+
+    override fun getItemCount(): Int {
+        return wordItems.size
+    }
+
+    inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        var tvWord: TextView = itemView.findViewById(R.id.tvWord)
+        var tvTranslation: TextView = itemView.findViewById(R.id.tvTranslation)
+
+    }
+
+    companion object { private val TAG = "VN/" + VocabularyAdapter::class.java.simpleName }
+}
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