
 
package org.androidtown.mylist;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
    ListView listView;
    SingerAdapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.listView);
        adapter = new SingerAdapter();
        listView.setAdapter(adapter);
    }
    class singerAdapter extends BaseAdapter{
        String[] names={"소녀시대","걸스데이","시스타","포미닛"};
        @Override
        public int getCount() {
            return names.length;
        }
        @Override
        public Object getItem(int position) {
            return names[position];
        }
        @Override
        public long getItemId(int position) {
            return position;
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            TextView view = new TextView(getApplicationContext());
            view.setText(names[position]);
            view.setTextSize(50,0f);
            return view;
        }
    }
}
 
--------------------------------------
 
<?xml version="1.0" encoding="utf-8"?>
<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="org.androidtown.mylist.MainActivity">
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />
    <ListView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/listView"
        android:layout_below="@+id/button"
        android:layout_alignParentEnd="true" />
</RelativeLayout>
 
이렇게 하고있는데 에러가 나네요 책에선 잘되는데;