public class MainActivity extends Activity {    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //...
    }
    public void btnShowByCursorAdapter(View v) {
        Cursor c = service.getScrollCursor(0, 20);
        SimpleCursorAdapter sa = new SimpleCursorAdapter(this, R.layout.item, c, 
                new String[]{"name","sex","phone","email"}, new int[]{R.id.name,R.id.sex,R.id.phone,R.id.email});
        listViewShowItem.setAdapter(sa);
    }    
    public void btnShowBySimpleAdapter(View v) {
        //...
    }    
    //....还有很多方法
}