将raw里面的数据库文件写入到data中

package com.city.list.db;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import com.city.list.main.R;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.os.Environment;

/**
* 将raw中得数据库文件写入到data数据库中
* @author sy
*
*/
public class DBManager
{
private final int BUFFER_SIZE = 400000;
private static final String PACKAGE_NAME = "com.city.list.main";
public static final String DB_NAME = "china_city_name.db";
public static final String DB_PATH = "/data" + Environment.getDataDirectory().getAbsolutePath() + "/" + PACKAGE_NAME ; // 存放路径
private Context mContext;
private SQLiteDatabase database;

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

/**
* 被调用方法
*/
public void openDateBase()
{
this.database = this.openDateBase(DB_PATH + "/" + DB_NAME);

}

/**
* 打开数据库
*
* @param dbFile
* @return SQLiteDatabase
* @author sy
*/
private SQLiteDatabase openDateBase(String dbFile)
{
File file = new File(dbFile);
if (!file.exists())
{
// 打开raw中得数据库文件，获得stream流
InputStream stream = this.mContext.getResources().openRawResource(R.raw.china_city_name);
try
{
// 将获取到的stream 流写入道data中
FileOutputStream outputStream = new FileOutputStream(dbFile);
byte[] buffer = new byte[BUFFER_SIZE];
int count = 0;
while ((count = stream.read(buffer)) > 0)
{
outputStream.write(buffer, 0, count);
}
outputStream.close();
stream.close();
SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(dbFile, null);
return db;
} catch (FileNotFoundException e)
{

e.printStackTrace();
} catch (IOException e)
{

e.printStackTrace();
}
}
return database;
}

public void closeDatabase()
{
if (database != null && database.isOpen())
{
this.database.close();
}
}
}