Added toolbar in conversation fragment.

app/src/main/java/org/communiquons/android/comunic/client/ui/activities/MainActivity.java

@@ -355,6 +355,19 @@ public class MainActivity extends AppCompatActivity implements
                 .create().show();
     }
 
+    /**
+     * Go backward in the application
+     *
+     * @param activity Activity object
+     */
+    public static void goBackward(@NonNull Activity activity){
+        if(!(activity instanceof MainActivity))
+            throw new RuntimeException("Called goBackward using an Activity different " +
+                    "from MainActivity!");
+
+        ((MainActivity)activity).getSupportFragmentManager().popBackStack();
+    }
+
     /**
      * Open the friends list fragment
      */

app/src/main/java/org/communiquons/android/comunic/client/ui/fragments/ConversationFragment.java

@@ -1,6 +1,9 @@
 package org.communiquons.android.comunic.client.ui.fragments;
 
 import android.app.AlertDialog;
+import android.graphics.PorterDuff;
+import android.graphics.drawable.Drawable;
+import android.support.design.widget.AppBarLayout;
 import android.support.v4.app.Fragment;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -9,8 +12,10 @@ import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.v7.app.ActionBarDrawerToggle;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.Toolbar;
 import android.util.ArrayMap;
 import android.util.Log;
 import android.view.KeyEvent;
@@ -99,6 +104,11 @@ public class ConversationFragment extends Fragment
      */
     private ConversationRefreshRunnable refreshRunnable;
 
+    /**
+     * Fragment toolbar
+     */
+    private Toolbar mToolbar;
+
     /**
      * Fragment main progress bar
      */
@@ -227,12 +237,26 @@ public class ConversationFragment extends Fragment
         no_msg_notice = view.findViewById(R.id.fragment_conversation_noMsgYet);
         display_not_msg_notice(false);
 
-        //Conversation messages listView
+        //Get views
         convMessRecyclerView = view.findViewById(R.id.fragment_conversation_messageslist);
+        mToolbar = view.findViewById(R.id.toolbar);
 
         //Need user ID
         int userID = new AccountUtils(getActivity()).get_current_user_id();
 
+        //Initialize toolbar
+        Drawable backDrawable = UiUtils.getDrawable(getActivity(), R.drawable.ic_back);
+        backDrawable.setColorFilter(UiUtils.getColor(getActivity(), android.R.color.white),
+                PorterDuff.Mode.SRC_IN);
+        mToolbar.setNavigationIcon(backDrawable);
+        mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                MainActivity.goBackward(getActivity());
+            }
+        });
+
+
         //Create the adapter
         convMessAdapter = new ConversationMessageAdapter(getActivity(),
                 messagesList, userID);
@@ -291,7 +315,6 @@ public class ConversationFragment extends Fragment
         //Hide new message sending wheel
         new_message_progress_bar.setVisibility(View.GONE);
 
-
         //Set a listener to detect when the user reaches the top of the conversation
         convMessRecyclerView.setOnScrollChangeDetectListener(this);
     }
@@ -307,7 +330,7 @@ public class ConversationFragment extends Fragment
         new Thread(refreshRunnable).start();
 
         //Update conversation title
-        getActivity().setTitle(R.string.fragment_conversation_title);
+        setTitle(UiUtils.getString(getActivity(), R.string.fragment_conversation_title));
         MainActivity.SetNavbarSelectedOption(getActivity(), R.id.action_conversations);
 
 
@@ -451,7 +474,7 @@ public class ConversationFragment extends Fragment
         conversationInfo = info;
 
         //Update the name of the conversation
-        getActivity().setTitle(info.getDisplayName());
+        setTitle(info.getDisplayName());
 
     }
 
@@ -612,6 +635,19 @@ public class ConversationFragment extends Fragment
         no_msg_notice.setVisibility(visible ? View.VISIBLE : View.GONE);
     }
 
+    /**
+     * Update the title of the fragment
+     *
+     * @param title New title
+     */
+    private void setTitle(String title){
+        if(getActivity() == null)
+            return;
+
+        getActivity().setTitle(title);
+        mToolbar.setTitle(title);
+    }
+
     /**
      * This method is called when the user reach the top of the conversation
      */

app/src/main/res/drawable/ic_back.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="25dp"
+    android:height="25dp"
+    android:viewportWidth="48.0"
+    android:viewportHeight="48.0">
+    <path
+        android:fillColor="@color/default_drawable_color"
+        android:pathData="M40 22H15.66l11.17-11.17L24 8 8 24l16 16 2.83-2.83L15.66 26H40v-4z"/>
+</vector>

app/src/main/res/layout/fragment_conversation.xml

@@ -1,16 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
     <!-- Loading wheel -->
     <ProgressBar
         android:id="@+id/fragment_conversation_progressbar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center"
+        android:layout_centerInParent="true" />
-        android:layout_marginTop="10dp"
-        android:layout_centerHorizontal="true"/>
 
     <!-- No message notice -->
     <TextView
@@ -26,6 +25,20 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
+        <android.support.design.widget.AppBarLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:theme="@style/AppTheme.AppBarOverlay">
+
+            <android.support.v7.widget.Toolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="?attr/actionBarSize"
+                android:background="?attr/colorPrimary"
+                app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+        </android.support.design.widget.AppBarLayout>
+
         <!-- Messages -->
         <org.communiquons.android.comunic.client.ui.views.ScrollRecyclerView
             android:id="@+id/fragment_conversation_messageslist"