【Listactivity.java】

public class ListActivity extends Activity {

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // データの作成
    List<CustomData> objects = new ArrayList<CustomData>();

    Bitmap image;
    image = BitmapFactory.decodeFile(getResources(), R.drawable.ic_lancher);

    CustomData item = new CustomData();

    item.setImage(image);

    for ( int i = 1; i <= 3; i++ ) {
      item.setId(i);
      item.setNumber(String.valueOf(i));
      objects.add(item);
    }

    CustomAdapter customAdapter = new CustomAdapter(this, 0, objects);
    ListView listView = (ListView)findViewById(R.id.list);
    listView.setAdapter(customAdapter);
  }

}

class CustomAdapter extends ArrayAdapter<CustomData> {
  private LayoutInflater layoutInflater_;

  public CustomAdapter(Context context, int textViewResourceId, List<CustomData> objects) {
    super(context, textViewResourceId, objects);
    layoutInflater_ = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    // 特定の行(position)のデータを得る
    CustomData item = (CustomData)getItem(position);
    // convertViewは使い回しされている可能性があるのでnullの時だけ新しく作る
    if (null == convertView) {
      convertView = layoutInflater_.inflate(R.layout.list_item, null);
    }

    // CustomDataのデータをViewの各Widgetにセットする
    ImageView imageView;
    imageView = (ImageView)convertView.findViewById(R.id.imageView1);
    imageView.setImageBitmap(item.getImage());

    TextView textView;
    textView = (TextView)convertView.findViewById(R.id._id);
    textView.setText(String.valueOf(item.getId()));

    TextView textView2;
    textView2 = (TextView)convertView.findViewById(R.id.number);
    textView2.setText(item.getNumber());

    return convertView;
  }
} 

class CustomData {
  private Bitmap image_;
  private int id_;
  private String number_;

  public void setImage(Bitmap image) {
    image_ = image;
  }
  public Bitmap getImage() {
    return image_;
  }

  public void setId(int id) {
    id_ = id;
  }
  public int getId() {
    return id_;
  }

  public void setNumber(String number) {
    number_ = number;
  }
  public String getNumber() {
    return number_;
  }
}

【main.xml】

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >

  <ListView
    android:id="@+id/list"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />

</LinearLayout>

【list_item.xml】

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="horizontal"
  android:padding="8px" >

  <ImageView
    android:id="@+id/imageView1"
    android:layout_width="80sp"
    android:layout_height="50sp" />

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:layout_marginLeft="6px" >

    <TextView
      android:id="@+id/_id"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:textSize="15sp" />

    <TextView
      android:id="@+id/number"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:textSize="15sp" />

  </LinearLayout>

</LinearLayout>

ListView関連で参考にさせていただいたURL
http://techbooster.jpn.org/andriod/ui/1282/
http://lablog.lanche.jp/archives/220
http://slumbers99.blogspot.com/2011/08/android-listview.html
http://labs.techfirm.co.jp/android/cho/751
http://d.hatena.ne.jp/tomstay/20110421/1303391426
http://www.adakoda.com/android/000077.html