public class DbManager
{
	private static final int BUFFER_SIZE = 2046;
	public static final String DB_NAME = "school_out.db";
	public static final String DB_PATH = "/data"
			+ android.os.Environment.getDataDirectory().getAbsolutePath()
			+ "包名" + "/";
	public static final String DB_FILE = DB_PATH + DB_NAME;

	private Context mContext;
	private SQLiteDatabase database;

	public DbManager(Context context)
	{
		super();
		this.mContext = context;
	}

	public void openDatabase()
	{
		closeDatebase();
		database = openDateBase();
	}

	/**
	 * 
	 * <b>功能名:</b> 打开数据库 <br/>
	 * <b>功能描述:</b> <br/>
	 * <b>创建时间:</b> 2013-8-6 <br/>
	 * <b>修改时间:</b> 2013-8-6 <br/>
	 * 
	 * @return
	 */
	public SQLiteDatabase openDateBase()
	{
		File file = new File(DB_FILE);
		// 如果文件不存在,将 raw 下的db文件复制到 data/data下面
		if (!file.exists())
		{
			File filePath = new File(DB_PATH);
			if(!file.exists())
				filePath.mkdirs();
			
			// // 打开raw中得数据库文件，获得stream流
			InputStream stream = this.mContext.getResources().openRawResource(
					R.raw.school_out);
			try
			{
				// 将获取到的stream 流写入道data中
				FileOutputStream outputStream = new FileOutputStream(DB_FILE);
				byte[] buffer = new byte[BUFFER_SIZE];
				int count = 0;
				while ((count = stream.read(buffer)) > 0)
				{
					outputStream.write(buffer, 0, count);
				}
				outputStream.close();
				stream.close();
			}
			catch (FileNotFoundException e)
			{
				e.printStackTrace();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
		}
		SQLiteDatabase database = SQLiteDatabase.openOrCreateDatabase(DB_FILE,
				null);
		return database;
	}
	
	public SchoolBean getBean(String schoolName)
	{
		SchoolBean bean = null;
		Cursor cursor = this.database.rawQuery("SELECT * FROM school_out where name = '" + schoolName + "'", null);
		
		try
		{
			int index = cursor.getCount();
			System.out.println(index);
			if(index != 0){
				cursor.moveToFirst();
				bean = new SchoolBean();
				bean.setId(cursor.getString(cursor.getColumnIndex("sid")));
				bean.setSchoolName(cursor.getString(cursor.getColumnIndex("name")));
		    }
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}finally
		{
			cursor.close();
		}
		
		return bean;
	}

	/**
	 * 获取学校数据（拉取10 条）
	 * */
	public ArrayList<SchoolBean> getSchoolList(String where)
	{
		ArrayList<SchoolBean> nameList = new ArrayList<SchoolBean>();
		Cursor cursor = this.database.rawQuery(
				"SELECT * FROM school_out where name like '%" + where
						+ "%' limit 0, 20", null);
		try
		{
			for (int i = 0; i < cursor.getCount(); i++)
			{
				cursor.moveToPosition(i);
				SchoolBean bean = new SchoolBean();
				bean.setId(cursor.getString(cursor.getColumnIndex("sid")));
				bean.setSchoolName(cursor.getString(cursor.getColumnIndex("name")));
				nameList.add(bean);
			}
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}finally{
			cursor.close();
		}
		return nameList;
	}
	
//	public SchoolBean[] getSchoolData(String where)
//	{
//		ArrayList<SchoolBean> lists = getSchoolList(where);
//		return (SchoolBean[]) lists.toArray();
//	}

	/**
	 * 
	 * <b>功能名:</b> 关闭数据库 <br/>
	 * <b>功能描述:</b> <br/>
	 * <b>创建时间:</b> 2013-8-6 <br/>
	 * <b>修改时间:</b> 2013-8-6 <br/>
	 */
	public void closeDatebase()
	{
		if (database != null && database.isOpen())
		{
			database.close();
		}
	}
}

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