在 Android 上下载文本文件 [英] Download a text file on Android

问题描述

我需要从服务器下载一个文本文件并将其保存在内存中.然后逐行阅读.更好 - 直接从服务器逐行读取.

I need to download a text file from a server and just save it in memory. Then go line by line and read it. Better off - read line by line directly from the server.

将其保存在内存中"意味着不将其写入文件.

'save it in memory' means without writing it to a file.

你会怎么做?

谢谢！

推荐答案

这有什么不可能?试试这个代码:注意创建文件的 CONTEXT 可能是一个 Activity/ApplicationContext/等.

What's so impossible about it ? Try this code: Notice that CONTEXT creating the file could be an Activity/ApplicationContext/etc.

public boolean downloadFile(final String path)
    {
        try
        {
            URL url = new URL(path);

            URLConnection ucon = url.openConnection();
            ucon.setReadTimeout(5000);
            ucon.setConnectTimeout(10000);

            InputStream is = ucon.getInputStream();
            BufferedInputStream inStream = new BufferedInputStream(is, 1024 * 5);

            File file = new File(CONTEXT.getDir("filesdir", Context.MODE_PRIVATE) + "/yourfile.png");

            if (file.exists())
            {
                file.delete();
            }
            file.createNewFile();

            FileOutputStream outStream = new FileOutputStream(file);
            byte[] buff = new byte[5 * 1024];

            int len;
            while ((len = inStream.read(buff)) != -1)
            {
                outStream.write(buff, 0, len);
            }

            outStream.flush();
            outStream.close();
            inStream.close();

        }
        catch (Exception e)
        {
            e.printStackTrace();
            return false;
        }

        return true;
    }

这是一个简单的文件读/写，使用活动 context .

It's a simple file R/W with the usage of the activity context .

根据您最近更改的问题，我在此处发布:

EDIT : As per your recently changed question, I am posting this here :

试试这段代码:

try {
    // Create a URL for the desired page
    URL url = new URL("ksite.com/thefile.txt");

    // Read all the text returned by the server
    BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
    String str;
    while ((str = in.readLine()) != null) {
        // str is one line of text; readLine() strips the newline character(s)
    }
    in.close();
} catch (MalformedURLException e) {
} catch (IOException e) {
}

这应该有效

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