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();

            }

        });

        

    }

}