Android - การเข้ารหัสข้อมูลด้วย RSA น่ะคับ ซึ่งติดปัญหา function บางอย่างเกิด Error

try{
                        text_cipher = encrypt(filecopy, original);          
                        encrypt_text.setText(decrypt(filecopy1,text_cipher));
                        //encrypt_text.setText(text_cipher);
                        edtPhone.setText(original);

                    } catch (FileNotFoundException ep){
                        encrypt_text.setText(ep.toString());
                    } catch (IOException ep){
                        encrypt_text.setText(ep.toString());
                    }catch (NoSuchAlgorithmException ep){
                        encrypt_text.setText(ep.toString());
                    }catch (InvalidKeySpecException ep){
                        encrypt_text.setText(ep.toString());
                    }catch (NoSuchPaddingException ep){
                        encrypt_text.setText(ep.toString());
                    }catch (InvalidKeyException ep){
                        encrypt_text.setText(ep.toString());
                    }catch (IllegalBlockSizeException ep){
                        encrypt_text.setText(ep.toString());
                    }catch (BadPaddingException ep){
                        encrypt_text.setText(ep.toString());
                    }

    public static String decrypt(String filePath1, String encrypted) throws IOException, NoSuchAlgorithmException, InvalidKeySpecException,NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {

        InputStream stream = new FileInputStream(filePath1);
        byte[] encodedKey1 = new byte[stream.available()];
        stream.read(encodedKey1);
        X509EncodedKeySpec publicKeySpec1 = new X509EncodedKeySpec(encodedKey1);
        KeyFactory kf1 = KeyFactory.getInstance("RSA");
        PublicKey pkPublic1 = kf1.generatePublic(publicKeySpec1);

        Cipher pkCipher1 = Cipher.getInstance("RSA/ECB/PKCS1PADDING");
        pkCipher1.init(Cipher.DECRYPT_MODE, pkPublic1);

        byte[] decoded = Base64Coder.decode(encrypted);
        byte[] decryptedInByte = pkCipher1.doFinal(decoded);
        return new String(decryptedInByte);
        // return encrypted;
    }