Passphrase wizard tests

3 files changed, 628 insertions, 22 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java
index a965d4819..fa7460915 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/CanonicalizedSecretKey.java
@@ -98,6 +98,7 @@ public class CanonicalizedSecretKey extends CanonicalizedPublicKey {
                     return GNU_DUMMY;
                 case 2:
                     return PASSPHRASE;
+//                return PATTERN;
                 case 3:
                     return PASSPHRASE_EMPTY;
                 case 4:
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyFragment.java
index 7acd62c72..2c4834e02 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyFragment.java
@@ -382,29 +382,32 @@ public class EditKeyFragment extends LoaderFragment implements
     }
 
     private void changePassphrase() {
+        Intent passIntent = new Intent(getActivity(), PassphraseWizardActivity.class);
+        passIntent.setAction(PassphraseWizardActivity.CREATE_METHOD);
+        startActivityForResult(passIntent, 12);
         // Message is received after passphrase is cached
-        Handler returnHandler = new Handler() {
-            @Override
-            public void handleMessage(Message message) {
-                if (message.what == SetPassphraseDialogFragment.MESSAGE_OKAY) {
-                    Bundle data = message.getData();
-
-                    // cache new returned passphrase!
-                    mSaveKeyringParcel.mNewUnlock = new ChangeUnlockParcel(
-                        data.getString(SetPassphraseDialogFragment.MESSAGE_NEW_PASSPHRASE),
-                        null
-                    );
-                }
-            }
-        };
-
-        // Create a new Messenger for the communication back
-        Messenger messenger = new Messenger(returnHandler);
-
-        SetPassphraseDialogFragment setPassphraseDialog = SetPassphraseDialogFragment.newInstance(
-                messenger, mCurrentPassphrase, R.string.title_change_passphrase);
-
-        setPassphraseDialog.show(getActivity().getSupportFragmentManager(), "setPassphraseDialog");
+//        Handler returnHandler = new Handler() {
+//            @Override
+//            public void handleMessage(Message message) {
+//                if (message.what == SetPassphraseDialogFragment.MESSAGE_OKAY) {
+//                    Bundle data = message.getData();
+//
+//                    // cache new returned passphrase!
+//                    mSaveKeyringParcel.mNewUnlock = new ChangeUnlockParcel(
+//                        data.getString(SetPassphraseDialogFragment.MESSAGE_NEW_PASSPHRASE),
+//                        null
+//                    );
+//                }
+//            }
+//        };
+//
+//        // Create a new Messenger for the communication back
+//        Messenger messenger = new Messenger(returnHandler);
+//
+//        SetPassphraseDialogFragment setPassphraseDialog = SetPassphraseDialogFragment.newInstance(
+//                messenger, mCurrentPassphrase, R.string.title_change_passphrase);
+//
+//        setPassphraseDialog.show(getActivity().getSupportFragmentManager(), "setPassphraseDialog");
     }
 
     private void editUserId(final int position) {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseWizardActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseWizardActivity.java
new file mode 100644
index 000000000..93778fd0c
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseWizardActivity.java
@@ -0,0 +1,602 @@
+/*
+ * Copyright (C) 2014 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;
+
+import android.annotation.TargetApi;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.nfc.FormatException;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.nfc.Tag;
+import android.nfc.tech.Ndef;
+import android.os.Build;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentActivity;
+import android.support.v4.app.FragmentTransaction;
+import android.text.TextUtils;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.haibison.android.lockpattern.LockPatternFragment;
+import com.haibison.android.lockpattern.LockPatternFragmentOld;
+import com.haibison.android.lockpattern.widget.LockPatternView;
+
+import org.sufficientlysecure.keychain.R;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.security.SecureRandom;
+import java.util.Arrays;
+import java.util.List;
+
+@TargetApi(Build.VERSION_CODES.HONEYCOMB)
+public class PassphraseWizardActivity extends FragmentActivity implements LockPatternView.OnPatternListener {
+    //create or authenticate
+    public String selectedAction;
+    //for lockpattern
+    public static char[] pattern;
+    private static String passphrase = "";
+    //nfc string
+    private static byte[] output = new byte[8];
+
+    public static final String CREATE_METHOD = "create";
+    public static final String AUTHENTICATION = "authenticate";
+
+    NfcAdapter adapter;
+    PendingIntent pendingIntent;
+    IntentFilter writeTagFilters[];
+    boolean writeMode;
+    Tag myTag;
+    boolean writeNFC = false;
+    boolean readNFC = false;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (getActionBar() != null) {
+            getActionBar().setTitle(R.string.unlock_method);
+        }
+
+        selectedAction = getIntent().getAction();
+        if (savedInstanceState == null) {
+            SelectMethods selectMethods = new SelectMethods();
+            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+            transaction.add(R.id.fragmentContainer, selectMethods).commit();
+        }
+        setContentView(R.layout.passphrase_wizard);
+
+        adapter = NfcAdapter.getDefaultAdapter(this);
+        if (adapter != null) {
+            pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this, PassphraseWizardActivity.class).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
+            IntentFilter tagDetected = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
+            tagDetected.addCategory(Intent.CATEGORY_DEFAULT);
+            writeTagFilters = new IntentFilter[]{tagDetected};
+        }
+    }
+
+    public void noPassphrase(View view) {
+        passphrase = "";
+        Toast.makeText(this, R.string.no_passphrase_set, Toast.LENGTH_SHORT).show();
+        this.finish();
+    }
+
+    public void passphrase(View view) {
+        Passphrase passphrase = new Passphrase();
+        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+        transaction.replace(R.id.fragmentContainer, passphrase).addToBackStack(null).commit();
+    }
+
+    public void startLockpattern(View view) {
+        if (getActionBar() != null) {
+            getActionBar().setTitle(R.string.draw_lockpattern);
+        }
+//        LockPatternFragmentOld lpf = LockPatternFragmentOld.newInstance(selectedAction);
+        LockPatternFragment lpf = LockPatternFragment.newInstance("asd");
+
+        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+        transaction.replace(R.id.fragmentContainer, lpf).addToBackStack(null).commit();
+    }
+
+    public void cancel(View view) {
+        this.finish();
+    }
+
+    public void savePassphrase(View view) {
+        EditText passphrase = (EditText) findViewById(R.id.passphrase);
+        passphrase.setError(null);
+        String pw = passphrase.getText().toString();
+        //check and save passphrase
+        if (selectedAction.equals(CREATE_METHOD)) {
+            EditText passphraseAgain = (EditText) findViewById(R.id.passphraseAgain);
+            passphraseAgain.setError(null);
+            String pwAgain = passphraseAgain.getText().toString();
+
+            if (!TextUtils.isEmpty(pw)) {
+                if (!TextUtils.isEmpty(pwAgain)) {
+                    if (pw.equals(pwAgain)) {
+                        PassphraseWizardActivity.passphrase = pw;
+                        Toast.makeText(this, getString(R.string.passphrase_saved), Toast.LENGTH_SHORT).show();
+                        this.finish();
+                    } else {
+                        passphrase.setError(getString(R.string.passphrase_invalid));
+                        passphrase.requestFocus();
+                    }
+                } else {
+                    passphraseAgain.setError(getString(R.string.missing_passphrase));
+                    passphraseAgain.requestFocus();
+                }
+            } else {
+                passphrase.setError(getString(R.string.missing_passphrase));
+                passphrase.requestFocus();
+            }
+        }
+        //check for right passphrase
+        if (selectedAction.equals(AUTHENTICATION)) {
+            if (pw.equals(PassphraseWizardActivity.passphrase)) {
+                Toast.makeText(this, getString(R.string.unlocked), Toast.LENGTH_SHORT).show();
+                this.finish();
+            } else {
+                passphrase.setError(getString(R.string.passphrase_invalid));
+                passphrase.requestFocus();
+            }
+        }
+    }
+
+    public void NFC(View view) {
+        if (adapter != null) {
+            if (getActionBar() != null) {
+                getActionBar().setTitle(R.string.nfc_title);
+            }
+            NFCFragment nfc = new NFCFragment();
+            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+            transaction.replace(R.id.fragmentContainer, nfc).addToBackStack(null).commit();
+
+            //if you want to create a new method or just authenticate
+            if (CREATE_METHOD.equals(selectedAction)) {
+                writeNFC = true;
+            } else if (AUTHENTICATION.equals(selectedAction)) {
+                readNFC = true;
+            }
+
+            if (!adapter.isEnabled()) {
+                showAlertDialog(getString(R.string.enable_nfc), true);
+            }
+        } else {
+            showAlertDialog(getString(R.string.no_nfc_support), false);
+        }
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {
+            myTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
+
+            if (writeNFC && CREATE_METHOD.equals(selectedAction)) {
+                //write new password on NFC tag
+                try {
+                    if (myTag != null) {
+                        write(myTag);
+                        writeNFC = false;   //just write once
+                        Toast.makeText(this, R.string.nfc_write_succesful, Toast.LENGTH_SHORT).show();
+                        //advance to lockpattern
+                        LockPatternFragmentOld lpf = LockPatternFragmentOld.newInstance(selectedAction);
+                        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+                        transaction.replace(R.id.fragmentContainer, lpf).addToBackStack(null).commit();
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                } catch (FormatException e) {
+                    e.printStackTrace();
+                }
+
+            } else if (readNFC && AUTHENTICATION.equals(selectedAction)) {
+                //read pw from NFC tag
+                try {
+                    if (myTag != null) {
+                        //if tag detected, read tag
+                        String pwtag = read(myTag);
+                        if (output != null && pwtag.equals(output.toString())) {
+
+                            //passwort matches, go to next view
+                            Toast.makeText(this, R.string.passphrases_match + "!", Toast.LENGTH_SHORT).show();
+
+                            LockPatternFragmentOld lpf = LockPatternFragmentOld.newInstance(selectedAction);
+                            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
+                            transaction.replace(R.id.fragmentContainer, lpf).addToBackStack(null).commit();
+                            readNFC = false;    //just once
+                        } else {
+                            //passwort doesnt match
+                            TextView nfc = (TextView) findViewById(R.id.nfcText);
+                            nfc.setText(R.string.nfc_wrong_tag);
+                        }
+                    }
+                } catch (IOException e) {
+                    e.printStackTrace();
+                } catch (FormatException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
+    private void write(Tag tag) throws IOException, FormatException {
+        //generate new random key and write them on the tag
+        SecureRandom sr = new SecureRandom();
+        sr.nextBytes(output);
+        NdefRecord[] records = {createRecord(output.toString())};
+        NdefMessage message = new NdefMessage(records);
+        Ndef ndef = Ndef.get(tag);
+        ndef.connect();
+        ndef.writeNdefMessage(message);
+        ndef.close();
+    }
+
+    private String read(Tag tag) throws IOException, FormatException {
+        //read string from tag
+        String password = null;
+        Ndef ndef = Ndef.get(tag);
+        ndef.connect();
+        NdefMessage ndefMessage = ndef.getCachedNdefMessage();
+
+        NdefRecord[] records = ndefMessage.getRecords();
+        for (NdefRecord ndefRecord : records) {
+            if (ndefRecord.getTnf() == NdefRecord.TNF_WELL_KNOWN && Arrays.equals(ndefRecord.getType(), NdefRecord.RTD_TEXT)) {
+                try {
+                    password = readText(ndefRecord);
+                } catch (UnsupportedEncodingException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+        ndef.close();
+        return password;
+    }
+
+    private String readText(NdefRecord record) throws UnsupportedEncodingException {
+        //low-level method for reading nfc
+        byte[] payload = record.getPayload();
+        String textEncoding = ((payload[0] & 128) == 0) ? "UTF-8" : "UTF-16";
+        int languageCodeLength = payload[0] & 0063;
+        return new String(payload, languageCodeLength + 1, payload.length - languageCodeLength - 1, textEncoding);
+    }
+
+    private NdefRecord createRecord(String text) throws UnsupportedEncodingException {
+        //low-level method for writing nfc
+        String lang = "en";
+        byte[] textBytes = text.getBytes();
+        byte[] langBytes = lang.getBytes("US-ASCII");
+        int langLength = langBytes.length;
+        int textLength = textBytes.length;
+        byte[] payload = new byte[1 + langLength + textLength];
+
+        // set status byte (see NDEF spec for actual bits)
+        payload[0] = (byte) langLength;
+        // copy langbytes and textbytes into payload
+        System.arraycopy(langBytes, 0, payload, 1, langLength);
+        System.arraycopy(textBytes, 0, payload, 1 + langLength, textLength);
+        return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_TEXT, new byte[0], payload);
+    }
+
+    public void showAlertDialog(String message, boolean nfc) {
+        //This method shows an AlertDialog
+        AlertDialog.Builder alert = new AlertDialog.Builder(this);
+        alert.setTitle("Information").setMessage(message).setPositiveButton("Ok",
+                new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialogInterface, int i) {
+                    }
+                }
+        );
+        if (nfc) {
+
+            alert.setNeutralButton(R.string.nfc_settings,
+                    new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialogInterface, int i) {
+                            startActivity(new Intent(Settings.ACTION_NFC_SETTINGS));
+                        }
+                    }
+            );
+        }
+        alert.show();
+    }
+
+    @Override
+    public void onPause() {
+        //pause this app and free nfc intent
+        super.onPause();
+        if (adapter != null) {
+            WriteModeOff();
+        }
+    }
+
+    @Override
+    public void onResume() {
+        //resume this app and get nfc intent
+        super.onResume();
+        if (adapter != null) {
+            WriteModeOn();
+        }
+    }
+
+    private void WriteModeOn() {
+        //enable nfc for this view
+        writeMode = true;
+        adapter.enableForegroundDispatch(this, pendingIntent, writeTagFilters, null);
+    }
+
+    private void WriteModeOff() {
+        //disable nfc for this view
+        writeMode = false;
+        adapter.disableForegroundDispatch(this);
+    }
+
+    @Override
+    public void onPatternStart() {
+
+    }
+
+    @Override
+    public void onPatternCleared() {
+
+    }
+
+    @Override
+    public void onPatternCellAdded(List<LockPatternView.Cell> pattern) {
+
+    }
+
+    @Override
+    public void onPatternDetected(List<LockPatternView.Cell> pattern) {
+
+    }
+
+    public static class SelectMethods extends Fragment {
+//        private OnFragmentInteractionListener mListener;
+
+        /**
+         * Use this factory method to create a new instance of
+         * this fragment using the provided parameters.
+         */
+        public SelectMethods() {
+
+        }
+
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+        }
+
+        @Override
+        public void onResume() {
+            super.onResume();
+            if (getActivity().getActionBar() != null) {
+                getActivity().getActionBar().setTitle(R.string.unlock_method);
+            }
+        }
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                                 Bundle savedInstanceState) {
+            // Inflate the layout for this fragment
+            return inflater.inflate(R.layout.passphrase_wizard_fragment_select_methods, container, false);
+        }
+
+//        @Override
+//        public void onAttach(Activity activity) {
+//            super.onAttach(activity);
+//            try {
+//                mListener = (OnFragmentInteractionListener) activity;
+//            } catch (ClassCastException e) {
+//                throw new ClassCastException(activity.toString()
+//                        + " must implement OnFragmentInteractionListener");
+//            }
+//        }
+//
+//        @Override
+//        public void onDetach() {
+//            super.onDetach();
+//            mListener = null;
+//        }
+
+        /**
+         * This interface must be implemented by activities that contain this
+         * fragment to allow an interaction in this fragment to be communicated
+         * to the activity and potentially other fragments contained in that
+         * activity.
+         * <p/>
+         * See the Android Training lesson <a href=
+         * "http://developer.android.com/training/basics/fragments/communicating.html"
+         * >Communicating with Other Fragments</a> for more information.
+         */
+//        public static interface OnFragmentInteractionListener {
+//            public void onFragmentInteraction(Uri uri);
+//        }
+
+    }
+
+
+    //    /**
+//     * A simple {@link android.support.v4.app.Fragment} subclass.
+//     * Activities that contain this fragment must implement the
+//     * {@link com.haibison.android.lockpattern.Passphrase.OnFragmentInteractionListener} interface
+//     * to handle interaction events.
+//     */
+    public static class Passphrase extends Fragment {
+
+//        private OnFragmentInteractionListener mListener;
+
+        public Passphrase() {
+        }
+
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+        }
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                                 Bundle savedInstanceState) {
+            // Inflate the layout for this fragment
+            View view = inflater.inflate(R.layout.passphrase_wizard_fragment_passphrase, container, false);
+            EditText passphraseAgain = (EditText) view.findViewById(R.id.passphraseAgain);
+            TextView passphraseText = (TextView) view.findViewById(R.id.passphraseText);
+            TextView passphraseTextAgain = (TextView) view.findViewById(R.id.passphraseTextAgain);
+            String selectedAction = getActivity().getIntent().getAction();
+            if (selectedAction.equals(AUTHENTICATION)) {
+                passphraseAgain.setVisibility(View.GONE);
+                passphraseTextAgain.setVisibility(View.GONE);
+                passphraseText.setText(R.string.enter_passphrase);
+//                getActivity().getActionBar().setTitle(R.string.enter_passphrase);
+            } else if (selectedAction.equals(CREATE_METHOD)) {
+                passphraseAgain.setVisibility(View.VISIBLE);
+                passphraseTextAgain.setVisibility(View.VISIBLE);
+                passphraseText.setText(R.string.passphrase);
+//                getActivity().getActionBar().setTitle(R.string.set_passphrase);
+            }
+            return view;
+        }
+
+//        @Override
+//        public void onAttach(Activity activity) {
+//            super.onAttach(activity);
+//            try {
+//                mListener = (OnFragmentInteractionListener) activity;
+//            } catch (ClassCastException e) {
+//                throw new ClassCastException(activity.toString()
+//                        + " must implement OnFragmentInteractionListener");
+//            }
+//        }
+//
+//        @Override
+//        public void onDetach() {
+//            super.onDetach();
+//            mListener = null;
+//        }
+
+//        /**
+//         * This interface must be implemented by activities that contain this
+//         * fragment to allow an interaction in this fragment to be communicated
+//         * to the activity and potentially other fragments contained in that
+//         * activity.
+//         * <p/>
+//         * See the Android Training lesson <a href=
+//         * "http://developer.android.com/training/basics/fragments/communicating.html"
+//         * >Communicating with Other Fragments</a> for more information.
+//         */
+//        public interface OnFragmentInteractionListener {
+//            public void onFragmentInteraction(Uri uri);
+//        }
+    }
+
+
+    /**
+     * A simple {@link android.support.v4.app.Fragment} subclass.
+     * Activities that contain this fragment must implement the
+     * interface
+     * to handle interaction events.
+     * Use the  method to
+     * create an instance of this fragment.
+     */
+    public static class NFCFragment extends Fragment {
+        // TODO: Rename parameter arguments, choose names that match
+        // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
+        private static final String ARG_PARAM1 = "param1";
+        private static final String ARG_PARAM2 = "param2";
+
+        // TODO: Rename and change types of parameters
+        private String mParam1;
+        private String mParam2;
+
+//        private OnFragmentInteractionListener mListener;
+
+        /**
+         * Use this factory method to create a new instance of
+         * this fragment using the provided parameters.
+         *
+         * @param param1 Parameter 1.
+         * @param param2 Parameter 2.
+         * @return A new instance of fragment SelectMethods.
+         */
+        // TODO: Rename and change types and number of parameters
+        public static NFCFragment newInstance(String param1, String param2) {
+            NFCFragment fragment = new NFCFragment();
+            Bundle args = new Bundle();
+            args.putString(ARG_PARAM1, param1);
+            args.putString(ARG_PARAM2, param2);
+            fragment.setArguments(args);
+            return fragment;
+        }
+
+        public NFCFragment() {
+            // Required empty public constructor
+        }
+
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+            if (getArguments() != null) {
+                mParam1 = getArguments().getString(ARG_PARAM1);
+                mParam2 = getArguments().getString(ARG_PARAM2);
+            }
+        }
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                                 Bundle savedInstanceState) {
+            // Inflate the layout for this fragment
+            return inflater.inflate(R.layout.passphrase_wizard_fragment_nfc, container, false);
+        }
+
+//        // TODO: Rename method, update argument and hook method into UI event
+//        public void onButtonPressed(Uri uri) {
+//            if (mListener != null) {
+//                mListener.onFragmentInteraction(uri);
+//            }
+//        }
+
+//        @Override
+//        public void onAttach(Activity activity) {
+//            super.onAttach(activity);
+//            try {
+//                mListener = (OnFragmentInteractionListener) activity;
+//            } catch (ClassCastException e) {
+//                throw new ClassCastException(activity.toString()
+//                        + " must implement OnFragmentInteractionListener");
+//            }
+//        }
+
+
+//        @Override
+//        public void onDetach() {
+//            super.onDetach();
+//            mListener = null;
+//        }
+    }
+
+}