Andorid Room数据库如何导出db

Question

因为我已经从下面的代码中导出了数据库文件，但是我无法打开导出的文件，我如何打开导出的文件？

 String dbName = Constants.DATABASE_NAME ; // Name without .db
 String currentDBPath = context.getDatabasePath(dbName).getPath();

 String backupDBPath = MyHelper.getDbExportPath() + "/" + dbName;
 File currentDB = new File(currentDBPath);
 File backupDB = new File(backupDBPath);
 if (currentDB.exists()) {
         FileChannel src = new FileInputStream(currentDB).getChannel();
         FileChannel dst = new FileOutputStream(backupDB).getChannel();
         dst.transferFrom(src, 0, src.size());
         src.close();
         dst.close();
}

Answer 1

对于currentDBPath，不考虑.db扩展，但对于backupDBPath，它需要.db扩展

String backupDBPath = MyHelper.getDbExportPath() + "/" + dbName + ".db";

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