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    <p>public class MainActivity extends Activity {</p> <pre><code> @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button encryptButton = (Button) findViewById(R.id.button1); Button DecryptButton = (Button) findViewById(R.id.button2); encryptButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub try { encrypt(); } catch (InvalidKeyException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); DecryptButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub try { decrypt(); } catch (InvalidKeyException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchPaddingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); } /** * Here is Both function for encrypt and decrypt file in Sdcard folder. we * can not lock folder but we can encrypt file using AES in Android, it may * help you. * * @throws IOException * @throws NoSuchAlgorithmException * @throws NoSuchPaddingException * @throws InvalidKeyException */ static void encrypt() throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException { // Here you read the cleartext. File extStore = Environment.getExternalStorageDirectory(); FileInputStream fis = new FileInputStream(extStore + "/sampleFile"); // This stream write the encrypted text. This stream will be wrapped by // another stream. FileOutputStream fos = new FileOutputStream(extStore + "/encrypted"); // Length is 16 byte SecretKeySpec sks = new SecretKeySpec("MyDifficultPassw".getBytes(), "AES"); // Create cipher Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, sks); // Wrap the output stream CipherOutputStream cos = new CipherOutputStream(fos, cipher); // Write bytes int b; byte[] d = new byte[8]; while ((b = fis.read(d)) != -1) { cos.write(d, 0, b); } // Flush and close streams. cos.flush(); cos.close(); fis.close(); } static void decrypt() throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException { File extStore = Environment.getExternalStorageDirectory(); FileInputStream fis = new FileInputStream(extStore + "/encrypted"); FileOutputStream fos = new FileOutputStream(extStore + "/decrypted"); SecretKeySpec sks = new SecretKeySpec("MyDifficultPassw".getBytes(), "AES"); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.DECRYPT_MODE, sks); CipherInputStream cis = new CipherInputStream(fis, cipher); int b; byte[] d = new byte[8]; while ((b = cis.read(d)) != -1) { fos.write(d, 0, b); } fos.flush(); fos.close(); cis.close(); } </code></pre> <p>} </p>
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    1. POHow do i decrypt a file in Android with AES?
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    1. USHasan Masud
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    1. POHow do i decrypt a file in Android with AES?
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    1. COSolved it a while ago and this is basically how I did it, forgot to update my answer so I'll mark this as correct
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      1. USPontus Backlund
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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