/**
   * Shows "call via" menu allowing user to selected from multiple providers.
   *
   * @param context the android context
   * @param v the View that will contain the popup menu.
   * @param destination target callee name.
   */
  private static void showCallViaMenu(final Context context, View v, final String destination) {
    PopupMenu popup = new PopupMenu(context, v);

    Menu menu = popup.getMenu();

    Iterator<ProtocolProviderService> registeredProviders =
        AccountUtils.getRegisteredProviders().iterator();

    while (registeredProviders.hasNext()) {
      final ProtocolProviderService provider = registeredProviders.next();
      String accountAddress = provider.getAccountID().getAccountAddress();

      MenuItem menuItem = menu.add(Menu.NONE, Menu.NONE, Menu.NONE, accountAddress);

      menuItem.setOnMenuItemClickListener(
          new MenuItem.OnMenuItemClickListener() {
            public boolean onMenuItemClick(MenuItem item) {
              createCall(context, destination, provider);

              return false;
            }
          });
    }

    popup.show();
  }
  /**
   * Creates new call to target <tt>destination</tt>.
   *
   * @param context the android context
   * @param destination the target callee name that will be used.
   */
  private static void createCall(Context context, String destination) {
    Iterator<ProtocolProviderService> allProviders =
        AccountUtils.getRegisteredProviders().iterator();

    if (!allProviders.hasNext()) {
      logger.error("No registered providers found");
      return;
    }

    createCall(context, destination, allProviders.next());
  }
  /** Initializes "select account" spinner with existing accounts. */
  private void initAccountSpinner() {
    Spinner accountsSpiner = (Spinner) findViewById(R.id.selectAccountSpinner);

    Iterator<ProtocolProviderService> providers = AccountUtils.getRegisteredProviders().iterator();

    List<AccountID> accounts = new ArrayList<AccountID>();

    int selectedIdx = -1;
    int idx = 0;

    while (providers.hasNext()) {
      ProtocolProviderService provider = providers.next();

      OperationSet opSet = provider.getOperationSet(OperationSetPresence.class);

      if (opSet == null) continue;

      AccountID account = provider.getAccountID();
      accounts.add(account);
      idx++;

      if (account.isPreferredProvider()) {
        selectedIdx = idx;
      }
    }

    AccountsListAdapter accountsAdapter =
        new AccountsListAdapter(
            this, R.layout.select_account_row, R.layout.select_account_dropdown, accounts, true);
    accountsSpiner.setAdapter(accountsAdapter);

    // if we have only select account option and only one account
    // select the available account
    if (accounts.size() == 1) accountsSpiner.setSelection(0);
    else accountsSpiner.setSelection(selectedIdx);
  }
 /**
  * Creates an android call.
  *
  * @param context the android context
  * @param callButtonView the button view that generated the call
  * @param contact the contact address to call
  */
 public static void createAndroidCall(Context context, View callButtonView, String contact) {
   if (AccountUtils.getRegisteredProviders().size() > 1)
     showCallViaMenu(context, callButtonView, contact);
   else createCall(context, contact);
 }
  /**
   * Initializes buttons panel.
   *
   * @param uiContact the <tt>UIContact</tt> for which we initialize the button panel
   */
  private void initButtonsPanel(UIContact uiContact) {
    this.remove(chatButton);
    this.remove(callButton);
    this.remove(callVideoButton);
    this.remove(desktopSharingButton);
    this.remove(addContactButton);

    clearCustomActionButtons();

    if (!isSelected) return;

    UIContactDetail imContact = null;
    // For now we support instance messaging only for contacts in our
    // contact list until it's implemented for external source contacts.
    if (uiContact.getDescriptor() instanceof MetaContact)
      imContact = uiContact.getDefaultContactDetail(OperationSetBasicInstantMessaging.class);

    int x = (statusIcon == null ? 0 : statusIcon.getIconWidth()) + LEFT_BORDER + H_GAP;

    // Re-initialize the x grid.
    constraints.gridx = 0;
    int gridX = 0;

    if (imContact != null) {
      x += addButton(chatButton, ++gridX, x, false);
    }

    UIContactDetail telephonyContact =
        uiContact.getDefaultContactDetail(OperationSetBasicTelephony.class);

    // Check if contact has additional phone numbers, if yes show the
    // call button
    ContactPhoneUtil contactPhoneUtil = null;

    // check for phone stored in contact info only
    // if telephony contact is missing
    if (uiContact.getDescriptor() != null
        && uiContact.getDescriptor() instanceof MetaContact
        && telephonyContact == null) {
      contactPhoneUtil = ContactPhoneUtil.getPhoneUtil((MetaContact) uiContact.getDescriptor());

      MetaContact metaContact = (MetaContact) uiContact.getDescriptor();
      Iterator<Contact> contacts = metaContact.getContacts();

      while (contacts.hasNext()) // && !hasPhone)
      {
        Contact contact = contacts.next();

        if (!contact.getProtocolProvider().isRegistered()) continue;

        contactPhoneUtil.addDetailsResponseListener(
            contact, new DetailsListener(treeNode, callButton, uiContact));
      }
    }

    // for SourceContact in history that do not support telephony, we
    // show the button but disabled
    List<ProtocolProviderService> providers =
        AccountUtils.getOpSetRegisteredProviders(OperationSetBasicTelephony.class, null, null);

    if ((telephonyContact != null && telephonyContact.getAddress() != null)
        || (contactPhoneUtil != null && contactPhoneUtil.isCallEnabled() && providers.size() > 0)) {
      x += addButton(callButton, ++gridX, x, false);
    }

    UIContactDetail videoContact =
        uiContact.getDefaultContactDetail(OperationSetVideoTelephony.class);

    if (videoContact != null
        || (contactPhoneUtil != null && contactPhoneUtil.isVideoCallEnabled())) {
      x += addButton(callVideoButton, ++gridX, x, false);
    }

    UIContactDetail desktopContact =
        uiContact.getDefaultContactDetail(OperationSetDesktopSharingServer.class);

    if (desktopContact != null
        || (contactPhoneUtil != null && contactPhoneUtil.isDesktopSharingEnabled())) {
      x += addButton(desktopSharingButton, ++gridX, x, false);
    }

    // enable add contact button if contact source has indicated
    // that this is possible
    if (uiContact.getDescriptor() instanceof SourceContact
        && uiContact.getDefaultContactDetail(OperationSetPersistentPresence.class) != null
        && AccountUtils.getOpSetRegisteredProviders(
                    OperationSetPersistentPresence.class, null, null)
                .size()
            > 0
        && !ConfigurationUtils.isAddContactDisabled()) {
      x += addButton(addContactButton, ++gridX, x, false);
    }

    // The list of the contact actions
    // we will create a button for every action
    Collection<SIPCommButton> contactActions = uiContact.getContactCustomActionButtons();

    int lastGridX = gridX;
    if (contactActions != null && contactActions.size() > 0) {
      lastGridX = initContactActionButtons(contactActions, gridX, x);
    } else {
      addLabels(gridX);
    }

    if (lastAddedButton != null) setButtonBg(lastAddedButton, lastGridX, true);

    this.setBounds(0, 0, treeContactList.getWidth(), getPreferredSize().height);
  }