Question

我想将我的数据库文件存储在drawable文件夹中，然后在SD-Card中创建备份。在尝试这样做时，我发现在为drawable文件夹指定的路径中存在问题。我这样做：

尝试{

        File sd = Environment.getExternalStorageDirectory();

        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            //db = openOrCreateDatabase("demodatabase.sqlite",SQLiteDatabase.CREATE_IF_NECESSARY,null);
    currentDBPath = "//drawable//demodatabase.sqlite";



   db=openOrCreateDatabase(uri.toString(), 0, null);
        System.out.println("====="+ currentDBPath);
        backupDBPath = "{demodatabase.sqlite}";

        File currentDB = new File(data,  currentDBPath);

        File backupDB = new File(sd, 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();

        }

        } }catch (Exception e) {}

提前完成。

Answer 1

你会把这些文件放在drawable文件夹中，但是放在你的资源文件夹中，只需使用

就可以得到这些文件的输入流

context.getAssets().open("demodatabase.sqlite")

数据库存储和检索

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