Android db file copy backup 資料庫 檔案 複製 備份

備份資料庫或檔案到其他位置，加入下列程式碼

try {
         File sd = Environment.getExternalStorageDirectory(); //複製到哪裡
         File data = Environment.getDataDirectory(); //原始位置

         if (sd.canWrite()) {
             String currentDBPath = "//data//com.httc.pipeline//xxx.db"; //原始位置檔名
             String backupDBPath = "xxx.db"; //複製位置檔名
             File currentDB = new File(data, currentDBPath);
             File backupDB = new File(sd, backupDBPath);
             Log.i("currentDB", currentDB+"");
             Log.i("backupDB", backupDB+"");
             if (currentDB.exists()) { //原始檔案存在
                 FileChannel src = new FileInputStream(currentDB).getChannel();
                 FileChannel dst = new FileOutputStream(backupDB).getChannel();
                 dst.transferFrom(src, 0, src.size()); //開始複製
                 Log.i("dst", dst+"");
                 src.close();
                 dst.close();
             }
         }
     } catch (Exception e) {
       Log.i("eDB", e+"");
     }

參考來源: http://stackoverflow.com/questions/1995320/how-to-backup-database-file-to-sdcard-on-android