How to decode base64 string and convert it into PDF/JPG and save it in storage

Give READ_STORAGE and Write_STORAGE Permission in Manifest and dont forget for RunTime Permission.

 public static void storetoPdfandOpen(Context context, String base) {



    String root = Environment.getExternalStorageDirectory().toString();

    Log.d("ResponseEnv",root);

    File myDir = new File(root + "/WorkBox");
    if (!myDir.exists()) {
        myDir.mkdirs();
    }

    Random generator = new Random();
    int n = 10000;
    n = generator.nextInt(n);

    String fname = "Attachments-" + n + ".pdf";
    File file = new File(myDir, fname);
    if (file.exists())
        file.delete();
    try {

        FileOutputStream out = new FileOutputStream(file);
        byte[] pdfAsBytes = Base64.decode(base, 0);
        out.write(pdfAsBytes);
        out.flush();
        out.close();


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

    File dir = new File(Environment.getExternalStorageDirectory(), "WorkBox");
    File imgFile = new File(dir, fname);
    Intent sendIntent = new Intent(Intent.ACTION_VIEW);

    Uri uri;
    if (Build.VERSION.SDK_INT < 24) {
        uri = Uri.fromFile(file);
    } else {
        uri = Uri.parse("file://" + imgFile); // My work-around for new SDKs, causes ActivityNotFoundException in API 10.
    }

    sendIntent.setDataAndType(uri, "application/pdf");
    sendIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
    context.startActivity(sendIntent);

}

You can try this:

FileOutputStream fos = new FileOutputStream(filepath);
fos.write(Base64.decode(base64String, Base64.NO_WRAP));
fos.close();

Where:

• filepath: Path to the new file
• base64String: Your base64 string that you want to convert