Java tutorial
//package com.java2s; import android.util.Base64; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; public class Main { public static File convertBase64IntoFile(String base64, String path) { File dwldsPath = new File(path); byte[] pdfAsBytes = convertBase64IntoByte(base64); FileOutputStream os; try { os = new FileOutputStream(dwldsPath, false); os.write(pdfAsBytes); os.flush(); os.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return dwldsPath; } public static byte[] convertBase64IntoByte(String base64) { byte[] decodedString = Base64.decode(base64, Base64.DEFAULT); return decodedString; } }