一覧画面を表示する処理を書く

Author: c5apple

app/src/main/java/com/example/kotlin_qiita_client/MainActivity.kt

@@ -1,12 +1,54 @@
 package com.example.kotlin_qiita_client
 
+import android.content.Context
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.ImageView
+import android.widget.ListView
+import android.widget.TextView
+import com.squareup.picasso.Picasso
 
 class MainActivity : AppCompatActivity() {
 
+    lateinit private var mAdapter: ListAdapter
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        mAdapter = ListAdapter(this, R.layout.list_item)
+
+        val listView = findViewById<ListView>(R.id.list_view) as ListView
+        listView.adapter = mAdapter
+    }
+
+    private inner class ListAdapter(context: Context, resource: Int) :
+        ArrayAdapter<Item>(context, resource) {
+
+        override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+            var convertView = convertView
+            if (convertView == null) {
+                // 再利用可能なViewがない場合は作る
+                convertView = layoutInflater.inflate(R.layout.list_item, null)
+            }
+
+            val imageView = convertView?.findViewById<ImageView>(R.id.image_view) as ImageView
+            val itemTitleView = convertView.findViewById<TextView>(R.id.item_title) as TextView
+            val userNameView = convertView.findViewById<TextView>(R.id.user_name) as TextView
+
+            imageView.setImageBitmap(null) // 残ってる画像を消す（再利用された時）
+
+            // 表示する行番号のデータを取り出す
+            val result = getItem(position)
+
+            Picasso.with(context).load(result.user?.profile_image_url).into(imageView)
+            itemTitleView.text = result.title
+            userNameView.text = result.user?.name
+
+            return convertView
+        }
     }
 }