Android ListView数据展示

Android ListView数据显示

package cn.itcast.db;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import cn.itcast.domain.Person;import cn.itcast.service.PersonService;import android.app.Activity;import android.content.ContentResolver;import android.content.ContentValues;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.Button;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.SimpleCursorAdapter;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class MainActivity extends Activity {    private PersonService personService;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                this.personService = new PersonService(this);               ListView listView = (ListView) this.findViewById(R.id.listView);        Cursor cursor = personService.getCursorScrollData(0, 5);        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.item, cursor,        new String[]{"_id", "name", "amount"}, new int[]{R.id.id, R.id.name, R.id.amount});        listView.setAdapter(adapter);        listView.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {ListView lView = (ListView)parent;Cursor data = (Cursor)lView.getItemAtPosition(position);int personid = data.getInt(data.getColumnIndex("_id"));Toast.makeText(MainActivity.this, personid+"", 1).show();}});        /*        List<Person> persons = personService.getScrollData(0, 5);        List<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();        for(Person person : persons){        HashMap<String, Object> item = new HashMap<String, Object>();        item.put("id", person.getId());        item.put("name", person.getName());        item.put("amount", person.getAmount());        data.add(item);        }        SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item,        new String[]{"id", "name", "amount"}, new int[]{R.id.id, R.id.name, R.id.amount});        listView.setAdapter(adapter);                listView.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {ListView lView = (ListView)parent;HashMap<String, Object> item = (HashMap<String, Object>)lView.getItemAtPosition(position);Toast.makeText(MainActivity.this, item.get("id").toString(), 1).show();}});*/                Button button = (Button) this.findViewById(R.id.insertbutton);        button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {ContentResolver contentResolver = getContentResolver();Uri insertUri = Uri.parse("content://cn.itcast.providers.personprovider/person");ContentValues values = new ContentValues();values.put("name", "itcastliming");values.put("amount", 100);Uri uri = contentResolver.insert(insertUri, values);Toast.makeText(MainActivity.this, "添加完成", 1).show();}});    }}