赵雅智_ListView_SimpleAdapter

项目步骤

详细案例

查找的方法

public List<Map<String, Object>> getData() {
SQLiteDatabase db = dh.getWritableDatabase();
List<Map<String, Object>> data = new ArrayList<Map<String, Object>>();
Cursor c = db
.rawQuery(
"select userid ,username,userage,usersalary,userphone from users",
null);

while (c.moveToNext()) {
Map<String, Object> map = new HashMap<String, Object>();
map.put("id", c.getInt(c.getColumnIndex("userid")));
map.put("name", c.getString(c.getColumnIndex("username")));
map.put("age", c.getInt(c.getColumnIndex("userage")));
map.put("phone", c.getString(c.getColumnIndex("userphone")));
data.add(map);
}
db.close();
return data;
}

布局文件

ArrayAdapter实现类（主程序）

package com.example.android_sqlite;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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.SimpleAdapter;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;

import com.example.android_sqlite.dao.impl.UserDaoImpls;
import com.example.android_sqlite.database.DatabaseHelper;

/**
* SimpleAdapter
*
* @author zhaoyazhi
*
*/
public class MainActivity extends Activity implements OnItemClickListener {
private ListView lv_users;// 视图层

// model层 相关的对象的声明
private DatabaseHelper dh;
private UserDaoImpls userDao;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

// 模型层
dh = new DatabaseHelper(this);// 创建数据库
userDao = new UserDaoImpls(dh);// 获取显示数据 model
List<Map<String, Object>> data = userDao.getData();// 查询获取数据

// 控制层 依赖于模型层
SimpleAdapter adapter = new SimpleAdapter(this, data,
R.layout.item_phone, new String[] { "name", "phone", "id",
"age" }, new int[] { R.id.tv_name, R.id.tv_phone,
R.id.tv_id, R.id.tv_age });

// 视图层 依赖于控制层
lv_users = (ListView) findViewById(R.id.lv_users);
lv_users.setAdapter(adapter);

// 注冊点击事件
lv_users.setOnItemClickListener(this);

}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long arg3) {

// 获取点击我的数据
Toast.makeText(this, parent.getItemAtPosition(position) + "", 0).show();

}

}