读取assets或者raw目录下的sqlite数据库

693579551

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();
}
}
}