将数据库文件从Dropbox还原到本地内存

时间:2014-05-29 18:51:23

标签: android dropbox

我在dropbox上实现了数据库备份,我想将数据库从dropbox恢复到内部存储器(data \ data \\ database),  我认为是禁止直接写,可以通过Dropbox上的文件流读取,打开本地文件,清除里面的数据,并将流刷新到文件中? 如果是的话,任何人都有代码吗?

我希望能够清楚。  这是我的代码......

private boolean downloadDropboxFile(String dbPath, File localFile) throws IOException{

    BufferedInputStream br = null;
    BufferedOutputStream bw = null;

    try {
        if (!localFile.exists()) {
            localFile.createNewFile(); //otherwise dropbox client will fail silently
        }
        byte[] buffer = new byte[4096];
        DropboxInputStream fd = mApi.getFileStream (dbPath, null);
        br = new BufferedInputStream(fd, buffer.length);
        bw = new BufferedOutputStream(new FileOutputStream(localFile));


        int read;
        while (true) {
            read = br.read(buffer);
            if (read <= 0) {
                break;
            }
            bw.write(buffer, 0, read);
        }
    } catch (DropboxException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
        //in finally block:
        if (bw != null) {
            bw.close();
        }
        if (br != null) {
            br.close();
        }
    }

    return true;
}

0 个答案:

没有答案