如何在Android中將文件轉換爲基礎64（如.pdf，.txt）？

Question

如何隱蔽的SD卡文件（.PDF，.TXT）立足64字符串，字符串發送到服務器

Answer 1

嘗試這些代碼

 File dir = Environment.getExternalStorageDirectory(); 
     File yourFile = new File(dir, "path/to/the/file/inside/the/sdcard.ext"); 
     String encodeFileToBase64Binary = encodeFileToBase64Binary(yourFile); 

     private static String encodeFileToBase64Binary(File fileName) throws IOException { 
       byte[] bytes = loadFile(fileName); 
       byte[] encoded = Base64.encodeBase64(bytes); 
       String encodedString = new String(encoded); 
       return encodedString; 
     } 

Answer 2

所有你需要做的就是讀取文件的字節數組，然後用Base64.encodeToString(byte[], int)來將其轉換爲Base64字符串。