android_adapter

package com.example.myfirstapp;

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;

public class PersonManagementActivity extends Activity {
    @Override
    protected void onCreate(Bundle state) {
        super.onCreate(state);
        setContentView(R.layout.activity_person_management);
        DBOpenHelper db=new DBOpenHelper(this);
        PersonService personService=new PersonService();
        personService.setDbOpenHelper(db);

        /*采用SimpleAdapter
        List<Person> personList=personService.queryPerson();
        List<Map<String,Object>> data=new ArrayList<Map<String,Object>>();
        for(Person person:personList){
            Map<String,Object> map=new HashMap<String,Object>();
            map.put("_id", person.getId());
            map.put("name", person.getName());
            map.put("age", person.getAge());
            data.add(map);
        }
        SimpleAdapter adapter=new SimpleAdapter(this,data,R.layout.activity_person_listviewitem,
                                                new String[]{"id","name","age"},
                                                new int[]{R.id.id,R.id.name,R.id.age});
                                                */
        
        Cursor c=personService.queryPersonCursor();
        //采用SimpleCursorAdapter 必须要有一个'_id'的字段
        SimpleCursorAdapter adapter=new SimpleCursorAdapter(this,R.layout.activity_person_listviewitem,c,
                                                            new String[]{"_id","name","age"},
                                                            new int[]{R.id.id,R.id.name,R.id.age});
        
        ListView listView=(ListView) findViewById(R.id.listView);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new OnItemClickListener() {
            public 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(PersonManagementActivity.this, item.get("_id").toString(),1).show();
                Cursor c=(Cursor) lView.getItemAtPosition(position);
                Toast.makeText(PersonManagementActivity.this,c.getString(c.getColumnIndex("_id")),1).show();
            }
        });
        
    }
}