java - 如何在 Android 中将文件转换为 base64(如 .pdf、.text)？

Question

如何将SD卡文件(.pdf,.text)转换为base 64字符串发送给服务器

Answer 1

这个方法对我有用

String encodeFileToBase64Binary = encodeFileToBase64Binary(yourFile);    

private String encodeFileToBase64Binary(File yourFile) {
    int size = (int) yourFile.length();
    byte[] bytes = new byte[size];
    try {
        BufferedInputStream buf = new BufferedInputStream(new FileInputStream(yourFile));
        buf.read(bytes, 0, bytes.length);
        buf.close();
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    String encoded = Base64.encodeToString(bytes,Base64.NO_WRAP);
    return encoded;
}