Developer Libraries » Trusted Intents

        android:id="@+id/save"

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

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

    <item

        android:id="@+id/virustotal"

        android:showAsAction="ifRoom|withText"

    <string name="save_cert_using">Save certificate using:</string>

import android.app.Activity;

import android.content.Context;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager.NameNotFoundException;

import android.content.pm.Signature;

import java.io.ByteArrayInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.security.cert.CertificateException;

import java.security.cert.CertificateFactory;

import java.security.cert.X509Certificate;

    private PackageManager pm;

    private void saveCertificate(AppEntry appEntry, Intent intent) {

        if (pm == null)

            pm = getActivity().getApplicationContext().getPackageManager();

        Activity activity = getActivity();

        String packageName = appEntry.getPackageName();

        PackageInfo pkgInfo;

        try {

            pkgInfo = pm.getPackageInfo(packageName, PackageManager.GET_SIGNATURES);

            CertificateFactory certFactory = CertificateFactory.getInstance("X509");

            for (Signature sig : pkgInfo.signatures) {

                byte[] cert = sig.toByteArray();

                InputStream inStream = new ByteArrayInputStream(cert);

                X509Certificate x509 = (X509Certificate) certFactory.generateCertificate(inStream);

                String fileName = packageName + ".cer";

                final FileOutputStream os = activity.openFileOutput(fileName,

                        Context.MODE_WORLD_READABLE);

                os.write(cert);

                os.close();

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

                        + " - " + x509.getNotAfter();

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

                Intent i = new Intent(Intent.ACTION_SEND);

                i.setType("application/pkix-cert");

                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 (NameNotFoundException e) {

            e.printStackTrace();

        } catch (CertificateException e) {

            e.printStackTrace();

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

                case R.id.save:

                    saveCertificate(appEntry, intent);

                    break;