Add additional email addresses in create key

Graphics/get-material-icons.sh

@@ -40,6 +40,7 @@ python copy OpenKeychain communication grey vpn_key 24
 python copy OpenKeychain navigation grey chevron_left 24
 python copy OpenKeychain navigation grey chevron_right 24
 python copy OpenKeychain social grey person 48
+python copy OpenKeychain communication grey email 24
 
 # navigation drawer sections
 python copy OpenKeychain communication black vpn_key 24

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateKeyEmailFragment.java

@@ -20,17 +20,30 @@ package org.sufficientlysecure.keychain.ui;
 import android.app.Activity;
 import android.content.Context;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
 import android.support.v4.app.Fragment;
+import android.support.v7.widget.DefaultItemAnimator;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
 import android.widget.EditText;
+import android.widget.ImageButton;
+import android.widget.TextView;
 
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.ui.CreateKeyActivity.FragAction;
+import org.sufficientlysecure.keychain.ui.dialog.AddEmailDialogFragment;
+import org.sufficientlysecure.keychain.ui.dialog.SetPassphraseDialogFragment;
 import org.sufficientlysecure.keychain.ui.widget.EmailEditText;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class CreateKeyEmailFragment extends Fragment {
 
     public static final String ARG_NAME = "name";
@@ -38,10 +51,14 @@ public class CreateKeyEmailFragment extends Fragment {
 
     CreateKeyActivity mCreateKeyActivity;
     EmailEditText mEmailEdit;
+    RecyclerView mEmailsRecyclerView;
     View mBackButton;
     View mNextButton;
 
     String mName;
+    ArrayList<EmailAdapter.ViewModel> mAdditionalEmailModels;
+
+    EmailAdapter mEmailAdapter;
 
     /**
      * Creates new instance of this fragment
@@ -86,6 +103,7 @@ public class CreateKeyEmailFragment extends Fragment {
         mEmailEdit = (EmailEditText) view.findViewById(R.id.create_key_email);
         mBackButton = view.findViewById(R.id.create_key_back_button);
         mNextButton = view.findViewById(R.id.create_key_next_button);
+        mEmailsRecyclerView = (RecyclerView) view.findViewById(R.id.create_key_emails);
 
         // initial values
         mName = getArguments().getString(ARG_NAME);
@@ -108,10 +126,45 @@ public class CreateKeyEmailFragment extends Fragment {
                 createKeyCheck();
             }
         });
+        mEmailsRecyclerView.setHasFixedSize(true);
+        mEmailsRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
+        mEmailsRecyclerView.setItemAnimator(new DefaultItemAnimator());
+
+        mAdditionalEmailModels = new ArrayList<>();
+        mEmailAdapter = new EmailAdapter(mAdditionalEmailModels, new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                addEmail();
+            }
+        });
+        mEmailsRecyclerView.setAdapter(mEmailAdapter);
 
         return view;
     }
 
+    private void addEmail() {
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                if (message.what == SetPassphraseDialogFragment.MESSAGE_OKAY) {
+                    Bundle data = message.getData();
+
+                    // add new user id
+                    mEmailAdapter.add(
+                            data.getString(AddEmailDialogFragment.MESSAGE_DATA_EMAIL)
+                    );
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(returnHandler);
+
+        AddEmailDialogFragment addEmailDialog = AddEmailDialogFragment.newInstance(messenger);
+
+        addEmailDialog.show(getActivity().getSupportFragmentManager(), "addEmailDialog");
+    }
+
     @Override
     public void onAttach(Activity activity) {
         super.onAttach(activity);
@@ -121,14 +174,137 @@ public class CreateKeyEmailFragment extends Fragment {
     private void createKeyCheck() {
         if (isEditTextNotEmpty(getActivity(), mEmailEdit)) {
 
+            ArrayList<String> emails = new ArrayList<>();
+            for (EmailAdapter.ViewModel holder : mAdditionalEmailModels) {
+                emails.add(holder.toString());
+            }
+
             CreateKeyPassphraseFragment frag =
                     CreateKeyPassphraseFragment.newInstance(
                             mName,
-                            mEmailEdit.getText().toString()
+                            mEmailEdit.getText().toString(),
+                            emails
                     );
 
             mCreateKeyActivity.loadFragment(null, frag, FragAction.TO_RIGHT);
         }
     }
 
+    public static class EmailAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+        private List<ViewModel> mDataset;
+        private View.OnClickListener mFooterOnClickListener;
+        private static final int TYPE_FOOTER = 0;
+        private static final int TYPE_ITEM = 1;
+
+        public static class ViewModel {
+            String email;
+
+            ViewModel(String email) {
+                this.email = email;
+            }
+
+            @Override
+            public String toString() {
+                return email;
+            }
+        }
+
+        // Provide a reference to the views for each data item
+        // Complex data items may need more than one view per item, and
+        // you provide access to all the views for a data item in a view holder
+        public static class ViewHolder extends RecyclerView.ViewHolder {
+            // each data item is just a string in this case
+            public TextView mTextView;
+            public ImageButton mDeleteButton;
+
+            public ViewHolder(View itemView) {
+                super(itemView);
+                mTextView = (TextView) itemView.findViewById(R.id.create_key_email_item_email);
+                mDeleteButton = (ImageButton) itemView.findViewById(R.id.create_key_email_item_delete_button);
+            }
+        }
+
+        class FooterHolder extends RecyclerView.ViewHolder {
+            public Button mAddButton;
+
+            public FooterHolder(View itemView) {
+                super(itemView);
+                mAddButton = (Button) itemView.findViewById(R.id.create_key_add_email);
+            }
+        }
+
+        // Provide a suitable constructor (depends on the kind of dataset)
+        public EmailAdapter(List<ViewModel> myDataset, View.OnClickListener onFooterClickListener) {
+            mDataset = myDataset;
+            mFooterOnClickListener = onFooterClickListener;
+        }
+
+        // Create new views (invoked by the layout manager)
+        @Override
+        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+            if (viewType == TYPE_FOOTER) {
+                View v = LayoutInflater.from(parent.getContext())
+                        .inflate(R.layout.create_key_email_list_footer, parent, false);
+                return new FooterHolder(v);
+            } else {
+                //inflate your layout and pass it to view holder
+                View v = LayoutInflater.from(parent.getContext())
+                        .inflate(R.layout.create_key_email_list_item, parent, false);
+                return new ViewHolder(v);
+            }
+        }
+
+        // Replace the contents of a view (invoked by the layout manager)
+        @Override
+        public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
+            if (holder instanceof ViewHolder) {
+                ViewHolder thisHolder = (ViewHolder) holder;
+                // - get element from your dataset at this position
+                // - replace the contents of the view with that element
+                final ViewModel model = mDataset.get(position);
+
+                thisHolder.mTextView.setText(model.email);
+                thisHolder.mDeleteButton.setOnClickListener(new View.OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        remove(model);
+                    }
+                });
+            } else if (holder instanceof FooterHolder) {
+                FooterHolder thisHolder = (FooterHolder) holder;
+                thisHolder.mAddButton.setOnClickListener(mFooterOnClickListener);
+            }
+        }
+
+        // Return the size of your dataset (invoked by the layout manager)
+        @Override
+        public int getItemCount() {
+            return mDataset.size() + 1;
+        }
+
+        @Override
+        public int getItemViewType(int position) {
+            if (isPositionFooter(position)) {
+                return TYPE_FOOTER;
+            } else {
+                return TYPE_ITEM;
+            }
+        }
+
+        private boolean isPositionFooter(int position) {
+            return position == mDataset.size();
+        }
+
+        public void add(String email) {
+            mDataset.add(new ViewModel(email));
+            notifyItemInserted(mDataset.size() - 1);
+        }
+
+        public void remove(ViewModel model) {
+            int position = mDataset.indexOf(model);
+            mDataset.remove(position);
+            notifyItemRemoved(position);
+        }
+    }
+
 }

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateKeyFinalFragment.java

@@ -47,6 +47,9 @@ import org.sufficientlysecure.keychain.ui.CreateKeyActivity.FragAction;
 import org.sufficientlysecure.keychain.util.Log;
 import org.sufficientlysecure.keychain.util.Preferences;
 
+import java.util.ArrayList;
+import java.util.Iterator;
+
 public class CreateKeyFinalFragment extends Fragment {
 
     public static final int REQUEST_EDIT_KEY = 0x00008007;
@@ -63,10 +66,12 @@ public class CreateKeyFinalFragment extends Fragment {
 
     public static final String ARG_NAME = "name";
     public static final String ARG_EMAIL = "email";
+    public static final String ARG_ADDITIONAL_EMAILS = "emails";
     public static final String ARG_PASSPHRASE = "passphrase";
 
     String mName;
     String mEmail;
+    ArrayList<String> mAdditionalEmails;
     String mPassphrase;
 
     SaveKeyringParcel mSaveKeyringParcel;
@@ -74,12 +79,15 @@ public class CreateKeyFinalFragment extends Fragment {
     /**
      * Creates new instance of this fragment
      */
-    public static CreateKeyFinalFragment newInstance(String name, String email, String passphrase) {
+    public static CreateKeyFinalFragment newInstance(String name, String email,
+                                                     ArrayList<String> additionalEmails,
+                                                     String passphrase) {
         CreateKeyFinalFragment frag = new CreateKeyFinalFragment();
 
         Bundle args = new Bundle();
         args.putString(ARG_NAME, name);
         args.putString(ARG_EMAIL, email);
+        args.putStringArrayList(ARG_ADDITIONAL_EMAILS, additionalEmails);
         args.putString(ARG_PASSPHRASE, passphrase);
 
         frag.setArguments(args);
@@ -102,11 +110,25 @@ public class CreateKeyFinalFragment extends Fragment {
         // get args
         mName = getArguments().getString(ARG_NAME);
         mEmail = getArguments().getString(ARG_EMAIL);
+        mAdditionalEmails = getArguments().getStringArrayList(ARG_ADDITIONAL_EMAILS);
         mPassphrase = getArguments().getString(ARG_PASSPHRASE);
 
         // set values
         mNameEdit.setText(mName);
+        if (mAdditionalEmails != null && mAdditionalEmails.size() > 0) {
+            String emailText = mEmail + ", ";
+            Iterator<?> it = mAdditionalEmails.iterator();
+            while (it.hasNext()) {
+                Object next = it.next();
+                emailText += next;
+                if (it.hasNext()) {
+                    emailText += ", ";
+                }
+            }
+            mEmailEdit.setText(emailText);
+        } else {
             mEmailEdit.setText(mEmail);
+        }
 
         mCreateButton.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -167,12 +189,19 @@ public class CreateKeyFinalFragment extends Fragment {
             String userId = KeyRing.createUserId(mName, mEmail, null);
             mSaveKeyringParcel.mAddUserIds.add(userId);
             mSaveKeyringParcel.mChangePrimaryUserId = userId;
+            if (mAdditionalEmails != null && mAdditionalEmails.size() > 0) {
+                for (String email : mAdditionalEmails) {
+                    String thisUserId = KeyRing.createUserId(mName, email, null);
+                    mSaveKeyringParcel.mAddUserIds.add(thisUserId);
+                }
+            }
             mSaveKeyringParcel.mNewUnlock = mPassphrase != null
                     ? new ChangeUnlockParcel(mPassphrase, null)
                     : null;
         }
     }
 
+
     private void createKey() {
         Intent intent = new Intent(getActivity(), KeychainIntentService.class);
         intent.setAction(KeychainIntentService.ACTION_EDIT_KEYRING);

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateKeyPassphraseFragment.java

@@ -35,14 +35,18 @@ import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.ui.CreateKeyActivity.FragAction;
 import org.sufficientlysecure.keychain.ui.widget.PassphraseEditText;
 
+import java.util.ArrayList;
+
 public class CreateKeyPassphraseFragment extends Fragment {
 
     public static final String ARG_NAME = "name";
     public static final String ARG_EMAIL = "email";
+    public static final String ARG_ADDITIONAL_EMAILS = "emails";
 
     // model
     String mName;
     String mEmail;
+    ArrayList<String> mAdditionalEmails;
 
     // view
     CreateKeyActivity mCreateKeyActivity;
@@ -55,12 +59,14 @@ public class CreateKeyPassphraseFragment extends Fragment {
     /**
      * Creates new instance of this fragment
      */
-    public static CreateKeyPassphraseFragment newInstance(String name, String email) {
+    public static CreateKeyPassphraseFragment newInstance(String name, String email,
+                                                          ArrayList<String> additionalEmails) {
         CreateKeyPassphraseFragment frag = new CreateKeyPassphraseFragment();
 
         Bundle args = new Bundle();
         args.putString(ARG_NAME, name);
         args.putString(ARG_EMAIL, email);
+        args.putStringArrayList(ARG_ADDITIONAL_EMAILS, additionalEmails);
 
         frag.setArguments(args);
 
@@ -114,6 +120,7 @@ public class CreateKeyPassphraseFragment extends Fragment {
         // initial values
         mName = getArguments().getString(ARG_NAME);
         mEmail = getArguments().getString(ARG_EMAIL);
+        mAdditionalEmails = getArguments().getStringArrayList(ARG_ADDITIONAL_EMAILS);
         mPassphraseEdit.requestFocus();
         mBackButton.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -163,6 +170,7 @@ public class CreateKeyPassphraseFragment extends Fragment {
                     CreateKeyFinalFragment.newInstance(
                             mName,
                             mEmail,
+                            mAdditionalEmails,
                             mPassphraseEdit.getText().toString()
                     );
 

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyFragment.java

@@ -528,7 +528,6 @@ public class EditKeyFragment extends LoaderFragment implements
     }
 
     private void addUserId() {
-        // Message is received after passphrase is cached
         Handler returnHandler = new Handler() {
             @Override
             public void handleMessage(Message message) {

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddEmailDialogFragment.java

@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2015 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.ui.dialog;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.os.Bundle;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.support.v4.app.DialogFragment;
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.ui.widget.EmailEditText;
+import org.sufficientlysecure.keychain.util.Log;
+
+public class AddEmailDialogFragment extends DialogFragment implements OnEditorActionListener {
+    private static final String ARG_MESSENGER = "messenger";
+
+    public static final int MESSAGE_OKAY = 1;
+    public static final int MESSAGE_CANCEL = 2;
+
+    public static final String MESSAGE_DATA_EMAIL = "email";
+
+    private Messenger mMessenger;
+    private EmailEditText mEmail;
+
+    public static AddEmailDialogFragment newInstance(Messenger messenger) {
+
+        AddEmailDialogFragment frag = new AddEmailDialogFragment();
+        Bundle args = new Bundle();
+        args.putParcelable(ARG_MESSENGER, messenger);
+        frag.setArguments(args);
+
+        return frag;
+    }
+
+    /**
+     * Creates dialog
+     */
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        final Activity activity = getActivity();
+        mMessenger = getArguments().getParcelable(ARG_MESSENGER);
+
+        CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity);
+
+        alert.setTitle(R.string.create_key_add_email);
+
+        LayoutInflater inflater = activity.getLayoutInflater();
+        View view = inflater.inflate(R.layout.add_email_dialog, null);
+        alert.setView(view);
+
+        mEmail = (EmailEditText) view.findViewById(R.id.add_email_address);
+
+        alert.setPositiveButton(android.R.string.ok, new OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int id) {
+                dismiss();
+
+                // return new user id back to activity
+                Bundle data = new Bundle();
+                String email = mEmail.getText().toString();
+                data.putString(MESSAGE_DATA_EMAIL, email);
+                sendMessageToHandler(MESSAGE_OKAY, data);
+            }
+        });
+
+        alert.setNegativeButton(android.R.string.cancel, new OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int id) {
+                dialog.cancel();
+            }
+        });
+
+        // Hack to open keyboard.
+        // This is the only method that I found to work across all Android versions
+        // http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/
+        // Notes: * onCreateView can't be used because we want to add buttons to the dialog
+        //        * opening in onActivityCreated does not work on Android 4.4
+        mEmail.setOnFocusChangeListener(new View.OnFocusChangeListener() {
+            @Override
+            public void onFocusChange(View v, boolean hasFocus) {
+                mEmail.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        InputMethodManager imm = (InputMethodManager) getActivity()
+                                .getSystemService(Context.INPUT_METHOD_SERVICE);
+                        imm.showSoftInput(mEmail, InputMethodManager.SHOW_IMPLICIT);
+                    }
+                });
+            }
+        });
+        mEmail.requestFocus();
+
+        mEmail.setImeActionLabel(getString(android.R.string.ok), EditorInfo.IME_ACTION_DONE);
+        mEmail.setOnEditorActionListener(this);
+
+        return alert.show();
+    }
+
+    @Override
+    public void onCancel(DialogInterface dialog) {
+        super.onCancel(dialog);
+
+        dismiss();
+        sendMessageToHandler(MESSAGE_CANCEL);
+    }
+
+    @Override
+    public void onDismiss(DialogInterface dialog) {
+        super.onDismiss(dialog);
+
+        // hide keyboard on dismiss
+        hideKeyboard();
+    }
+
+    private void hideKeyboard() {
+        if (getActivity() == null) {
+            return;
+        }
+        InputMethodManager inputManager = (InputMethodManager) getActivity()
+                .getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        // check if no view has focus:
+        View v = getActivity().getCurrentFocus();
+        if (v == null)
+            return;
+
+        inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
+    }
+
+    /**
+     * Associate the "done" button on the soft keyboard with the okay button in the view
+     */
+    @Override
+    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+        if (EditorInfo.IME_ACTION_DONE == actionId) {
+            AlertDialog dialog = ((AlertDialog) getDialog());
+            Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
+
+            bt.performClick();
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Send message back to handler which is initialized in a activity
+     *
+     * @param what Message integer you want to send
+     */
+    private void sendMessageToHandler(Integer what) {
+        Message msg = Message.obtain();
+        msg.what = what;
+
+        try {
+            mMessenger.send(msg);
+        } catch (RemoteException e) {
+            Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
+        } catch (NullPointerException e) {
+            Log.w(Constants.TAG, "Messenger is null!", e);
+        }
+    }
+
+    /**
+     * Send message back to handler which is initialized in a activity
+     *
+     * @param what Message integer you want to send
+     */
+    private void sendMessageToHandler(Integer what, Bundle data) {
+        Message msg = Message.obtain();
+        msg.what = what;
+        if (data != null) {
+            msg.setData(data);
+        }
+
+        try {
+            mMessenger.send(msg);
+        } catch (RemoteException e) {
+            Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
+        } catch (NullPointerException e) {
+            Log.w(Constants.TAG, "Messenger is null!", e);
+        }
+    }
+
+}

OpenKeychain/src/main/res/layout/add_email_dialog.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:paddingTop="16dp"
+    android:paddingBottom="16dp"
+    android:paddingLeft="24dp"
+    android:paddingRight="24dp">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/create_key_add_email_text"
+        android:textAppearance="?android:textAppearanceMedium" />
+
+    <org.sufficientlysecure.keychain.ui.widget.EmailEditText
+        android:id="@+id/add_email_address"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:hint="@string/label_email"
+        android:imeOptions="actionNext"
+        android:textAppearance="?android:attr/textAppearanceMedium" />
+
+</LinearLayout>

OpenKeychain/src/main/res/layout/create_key_email_fragment.xml

@@ -4,6 +4,7 @@
     android:layout_height="match_parent">
 
     <ScrollView
+        android:layout_alignParentTop="true"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:fillViewport="true"
@@ -34,6 +35,12 @@
                 android:hint="@string/label_email"
                 android:ems="10" />
 
+            <android.support.v7.widget.RecyclerView
+                android:id="@+id/create_key_emails"
+                android:scrollbars="vertical"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+
         </LinearLayout>
     </ScrollView>
 

OpenKeychain/src/main/res/layout/create_key_email_list_footer.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:minHeight="16dp"
+    android:orientation="horizontal"
+    android:singleLine="true">
+
+    <Button
+        android:id="@+id/create_key_add_email"
+        android:paddingLeft="8dp"
+        android:paddingRight="8dp"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="@string/btn_add_email"
+        style="?android:attr/borderlessButtonStyle"
+        android:drawableLeft="@drawable/ic_email_grey_24dp"
+        android:drawablePadding="8dp"
+        android:gravity="left|center_vertical" />
+
+</LinearLayout>

OpenKeychain/src/main/res/layout/create_key_email_list_item.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:minHeight="16dp"
+    android:orientation="horizontal"
+    android:singleLine="true">
+
+    <TextView
+        android:id="@+id/create_key_email_item_email"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:gravity="center_vertical"
+        android:layout_weight="1"
+        android:text="alice@example.com"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        android:paddingLeft="8dp" />
+
+    <ImageButton
+        android:id="@+id/create_key_email_item_delete_button"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:padding="8dp"
+        android:src="@drawable/ic_close_grey_24dp"
+        android:layout_gravity="center_vertical"
+        style="@style/SelectableItem" />
+
+</LinearLayout>

OpenKeychain/src/main/res/values/strings.xml

@@ -98,6 +98,7 @@
     <string name="btn_decrypt_files">"Decrypt files"</string>
     <string name="btn_encrypt_files">"Encrypt files"</string>
     <string name="btn_encrypt_text">"Encrypt text"</string>
+    <string name="btn_add_email">"Add additional email address"</string>
 
     <!-- menu -->
     <string name="menu_preferences">"Settings"</string>
@@ -628,10 +629,12 @@
     <string name="create_key_rsa">"(3 subkeys, RSA, 4096 bit)"</string>
     <string name="create_key_custom">"(custom key configuration)"</string>
     <string name="create_key_name_text">"Choose a name associated with this key. This can be a full name, e.g., 'John Doe', or a nickname, e.g., 'Johnny'."</string>
-    <string name="create_key_email_text">"Choose the email address used for encrypted communication."</string>
+    <string name="create_key_email_text">"Enter your main email address used for secure communication."</string>
     <string name="create_key_passphrase_text">"Choose a strong passphrase. It protects your key when your device gets stolen."</string>
     <string name="create_key_hint_full_name">"Full Name or Nickname"</string>
     <string name="create_key_edit">"Change key configuration"</string>
+    <string name="create_key_add_email">"Add email address"</string>
+    <string name="create_key_add_email_text">"Additional email addresses are also associated to this key and can be used for secure communication."</string>
 
     <!-- View key -->
     <string name="view_key_revoked">"Revoked: Key must not be used anymore!"</string>