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(); } }}
原标题：将raw里面的数据库文件写入到data中
关键词：数据库
我知道了 