Android の単純な ListView のバリエーション

ArrayAdapter を android.R.layout.simple_list_item_1 で4パターン
SimpleAdapter の android.R.layout.simple_list_item_2 で1パターンです

package app.lightbox.winofsql.jp.listviewaction;
 
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
 
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
public class MainActivity extends Activity {
 
        private ArrayAdapter<String> strArrayAdapter = null;
        private ArrayAdapter<MyData> arrayMyData = null;
        private ListView listview = null;
        private String [] strData1 = null;
        private String [] strData1Url = null;
        private String [] strData2 = null;
        private SimpleAdapter itemsAdapter = null;
 
        // ListView にセットする配列用クラス
        class MyData {
                public String title = null;
                public String url = null;
                public MyData(String myTitle,String myUrl) {
                        title = myTitle;
                        url = myUrl;
                }
                // toString で呼び出された内容が ListView に表示されます
                @Override
                public String toString() {
                        return title;
                }
        }
 
        // https://developer.android.com/guide/components/intents-common.html#Browser
        private void callBrowser( String url ) {
                // ブラウザの呼び出し
                Uri uri = Uri.parse(url);
                Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                if (intent.resolveActivity(getPackageManager()) != null) {
                        startActivity(intent);
                        return;
                }
 
                // 対応するアプリが無い
                Toast.makeText(
                                MainActivity.this,
                                "ブラウザを呼び出せません",
                                Toast.LENGTH_LONG
                ).show();
                return;
 
        }
 
        @Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);
 
                // ListView のインスタンスを取得
                listview = (ListView) MainActivity.this.findViewById(R.id.listView);
                // クリックした時のイベント作成
                listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                        @Override
                        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                                // クリックされたビューの内部データ
                                Object data = (Object)parent.getItemAtPosition(position);
                                // クラス名を取得
                                Log.i("lightbox","data type:" + data.getClass().getName());
                                String myClass = "app.lightbox.winofsql.jp.listviewaction.MainActivity$MyData";
                                String simple = "java.util.HashMap";
                                // 専用クラスの場合
                                if ( myClass.equals(data.getClass().getName()) ) {
                                        MyData myData = (MyData)data;
                                        Log.i("lightbox", "title:" + myData.title);
                                        Log.i("lightbox", "url:" + myData.url);
 
                                        // ブラウザの呼び出し
                                        callBrowser(myData.url);
                                        return;
                                }
 
                                if ( simple.equals(data.getClass().getName()) ) {
                                        Map map = (Map)data;
                                        Log.i("lightbox", "title:" + map.get("item1"));
                                        Log.i("lightbox", "url:" + map.get("item2"));
 
                                        // ブラウザの呼び出し
                                        callBrowser(map.get("item2").toString());
                                        return;
                                }
 
                                // 単純な文字列の場合
                                String myData = (String)data;
                                Log.i("lightbox", "text:" + (String)data);
 
                        }
                });
 
                // 単純な文字列配列用
                strArrayAdapter = new ArrayAdapter<String>(
                        MainActivity.this,
                        android.R.layout.simple_list_item_1,
                        android.R.id.text1
                );
                // 専用クラス用
                arrayMyData = new ArrayAdapter<MyData>(
                                MainActivity.this,
                                android.R.layout.simple_list_item_1,
                                android.R.id.text1
                );
 
                // タイトルデータ(1)
                strData1 = new String[]{
                        "Yahoo! ニュース","Yahoo! 雨雲ズームレーダー",
                        "ねとらぼ","GIGAZINE","Twitter","OneDrive",
                        "楽天市場","ウィキペディア","Yahoo!テレビ",
                        "＠IT","Stack Overflow","Android Developers"
                };
                // タイトルデータ(1) の URL データ
                strData1Url = new String[]{
                        "http://news.yahoo.co.jp/",
                        "http://weather.yahoo.co.jp/weather/zoomradar/",
                        "http://nlab.itmedia.co.jp/",
                        "http://gigazine.net/",
                        "http://twitter.com/",
                        "http://onedrive.live.com/",
                        "http://www.rakuten.co.jp/",
                        "https://ja.wikipedia.org",
                        "http://tv.yahoo.co.jp/",
                        "http://www.atmarkit.co.jp/",
                        "http://stackoverflow.com/",
                        "http://developer.android.com/index.html"
                };
 
                // タイトルデータ(2)
                strData2 = new String[]{
                        "GIGAZINE","Twitter","OneDrive","楽天市場",
                        "ウィキペディア","Yahoo! ニュース",
                        "Yahoo! 雨雲ズームレーダー","Yahoo!テレビ",
                        "ねとらぼ","＠IT","Stack Overflow",
                        "Android Developers","Facebook","Dropbox"
                };
 
        }
 
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
                getMenuInflater().inflate(R.menu.menu_main, menu);
                return true;
        }
 
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
                int id = item.getItemId();
 
                // 文字列を一つ一つ add して ListView を作成します
                if (id == R.id.lv_action1) {
                        // ArrayAdapter をクリア
                        strArrayAdapter.clear();
                        for( int i = 0; i < strData1.length; i++ ) {
                                strArrayAdapter.add(strData1[i]);
                        }
                        listview.setAdapter(strArrayAdapter);
                        return true;
                }
 
                // 配列をそのままセットして ListView を作成します
                if (id == R.id.lv_action2) {
                        // ArrayAdapter をクリア
                        strArrayAdapter.clear();
                        // でき上がっている配列をそのままセット
                        strArrayAdapter.addAll(strData2);
                        listview.setAdapter(strArrayAdapter);
                        return true;
                }
 
                // List をそのままセットして ListView を作成します
                if (id == R.id.lv_action3) {
                        // ArrayAdapter をクリア
                        strArrayAdapter.clear();
                        // 配列から List を作成
                        List<String> list = Arrays.asList(strData1);
                        // List を指定する addAll
                        strArrayAdapter.addAll(list);
                        listview.setAdapter(strArrayAdapter);
                        return true;
                }
 
                // 専用クラス用のアダプタで ListView を作成します
                if (id == R.id.lv_action4) {
                        // ArrayAdapter をクリア
                        arrayMyData.clear();
                        // 配列から作成
                        for( int i = 0; i < strData1.length; i++ ) {
                                arrayMyData.add(new MyData(strData1[i],strData1Url[i]));
                        }
                        listview.setAdapter(arrayMyData);
                        return true;
                }
 
                // SimpleAdapter で複数項目の表示
                if (id == R.id.lv_action5) {
                        // 内部データを作成
                        List list = new ArrayList<Map<String, ?>>();
                        for( int i = 0; i < strData1.length; i++ ) {
                                Map map = new HashMap();
                                // 名前は文字列で適当に付けます( item1, item2 )
                                map.put("item1", strData1[i]);
                                map.put("item2", strData1Url[i]);
                                list.add(map);
                        }
 
                        // 複数項目のビュー用のインスタンス
                        itemsAdapter = new SimpleAdapter(
                                // 1)
                                MainActivity.this,
                                // 2)
                                list,
                                // 3) 二つの項目を持つビュー
                                android.R.layout.simple_list_item_2,
                                // 4) ここで項目を一致させる
                                new String[] { "item1", "item2" },
                                // 5) 実際のビューの id と一致させる
                                new int[] { android.R.id.text1, android.R.id.text2 }
                        );
                        listview.setAdapter(itemsAdapter);
                        return true;
                }
 
                return super.onOptionsItemSelected(item);
        }
}


画面定義

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingBottom="@dimen/activity_vertical_margin"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_vertical_margin"
                tools:context=".MainActivity">
 
        <ListView
                android:id="@+id/listView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentStart="true"
                android:layout_alignParentTop="true"/>
 
</RelativeLayout>

メニュー

<menu xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                tools:context=".MainActivity">
        <item
                android:id="@+id/lv_action1"
                android:title="ArrayAdapter add"
                android:orderInCategory="100"
                android:showAsAction="never"/>
        <item
                android:id="@+id/lv_action2"
                android:title="ArrayAdapter addAll Array"
                android:orderInCategory="100"
                android:showAsAction="never"/>
        <item
                android:id="@+id/lv_action3"
                android:title="ArrayAdapter addAll List"
                android:orderInCategory="100"
                android:showAsAction="never"/>
        <item
                android:id="@+id/lv_action4"
                android:title="ArrayAdapter addAll MyData"
                android:orderInCategory="100"
                android:showAsAction="never"/>
        <item
                android:id="@+id/lv_action5"
                android:title="SimpleAdapter で複数項目"
                android:orderInCategory="100"
                android:showAsAction="never"/>
 
</menu>