Developer Libraries » Trusted Intents

        android:id="@+id/generate_pin"

        android:icon="@android:drawable/ic_menu_set_as"

        android:showAsAction="ifRoom|withText"

        android:title="@string/generate_pin"/>

    <item

    <string name="generate_pin">Generate Pin</string>

            case R.id.generate_pin:

                generatePin(appEntry, intent);

                return true;

    @SuppressLint("WorldReadableFiles")

    @SuppressWarnings("deprecation")

    private void generatePin(AppEntry appEntry, Intent intent) {

        String packageName = appEntry.getPackageName();

        try {

            for (X509Certificate x509 : getX509Certificates(this, packageName)) {

                Properties prop = new Properties();

                prop.load(new StringBufferInputStream(x509.getSubjectDN().getName()

                        .replaceAll(",", "\n")));

                prop.list(System.out);

                String name;

                if (prop.containsKey("OU") && prop.containsKey("O"))

                    name = (String) prop.get("OU") + prop.get("O");

                else if (prop.containsKey("O"))

                    name = (String) prop.get("O");

                else if (prop.containsKey("OU"))

                    name = (String) prop.get("OU");

                else if (prop.containsKey("CN"))

                    name = (String) prop.get("CN");

                else

                    name = "Unknown";

                name = name.replaceAll("[^A-Za-z0-9]", "");

                String fileName = name + "Pin.java";

                Log.i("AppListFragment", "subjectdn: " + x509.getSubjectDN().getName());

                final FileOutputStream os = openFileOutput(fileName,

                        Context.MODE_WORLD_READABLE);

                os.write(("\n\n"

                        + "import info.guardianproject.secureintents.CertificatePin;\n\n"

                        + "public final class "

                        + name

                        + "Pin extends CertificatePin {\n\n"

                        + "\tprotected final static byte[] certificate = ").getBytes());

                os.write(Arrays.toString(x509.getEncoded())

                        .replaceAll("\\[", "{").replaceAll("\\]", "}")

                        .getBytes());

                os.write(";\n}\n".getBytes());

                os.close();

                Log.i("AppListFragment", "wrote " + fileName);

                String subject = packageName + " - " + x509.getIssuerDN().getName()

                        + " - " + x509.getNotAfter();

                Uri uri = Uri.fromFile(getFileStreamPath(fileName));

                Intent i = new Intent(Intent.ACTION_SEND);

                i.setType("text/x-java-source");

                i.putExtra(Intent.EXTRA_STREAM, uri);

                i.putExtra(Intent.EXTRA_TITLE, subject);

                i.putExtra(Intent.EXTRA_SUBJECT, subject);

                startActivity(Intent.createChooser(i, getString(R.string.save_cert_using)));

            }

        } catch (CertificateException e) {

            e.printStackTrace();

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }