It is possible to enlarge conversation messages images.

app/src/main/java/org/communiquons/android/comunic/client/ui/adapters/ConversationMessageAdapter.java

@@ -18,6 +18,7 @@ import org.communiquons.android.comunic.client.data.helpers.ImageLoadHelper;
 import org.communiquons.android.comunic.client.data.models.UserInfo;
 import org.communiquons.android.comunic.client.data.models.ConversationMessage;
 import org.communiquons.android.comunic.client.ui.utils.UiUtils;
+import org.communiquons.android.comunic.client.ui.views.WebImageView;
 import org.communiquons.android.comunic.client.ui.views.WebUserAccountImage;
 
 import java.util.ArrayList;
@@ -96,7 +97,7 @@ public class ConversationMessageAdapter extends ArrayAdapter<ConversationMessage
                 .findViewById(R.id.fragment_conversation_message_item_container);
         TextView contentView = convertView.
                 findViewById(R.id.fragment_conversation_message_item_content);
-        ImageView messageImageView = convertView.
+        WebImageView messageImageView = convertView.
                 findViewById(R.id.fragment_conversation_message_item_messageimage);
         WebUserAccountImage accountImageView;
         TextView userNameView = convertView.
@@ -181,8 +182,7 @@ public class ConversationMessageAdapter extends ArrayAdapter<ConversationMessage
          */
         if(message.hasImage()){
             //Load the image
-            ImageLoadHelper.remove(messageImageView);
-            ImageLoadHelper.load(getContext(), message.getImage_path(), messageImageView);
+            messageImageView.loadURL(message.getImage_path());
 
             //Make the image visible
             messageImageView.setVisibility(View.VISIBLE);

app/src/main/java/org/communiquons/android/comunic/client/ui/views/EnlargeableWebImageView.java

@@ -0,0 +1,92 @@
+package org.communiquons.android.comunic.client.ui.views;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.ActionMenuView;
+import android.widget.ImageView;
+
+import org.communiquons.android.comunic.client.R;
+
+/**
+ * Enlargeable images view.
+ *
+ * The image represented by this view can be clicked in order to be shown in a bigger way
+ *
+ * @author Pierre HUBERT
+ * Created by pierre on 4/28/18.
+ */
+
+public class EnlargeableWebImageView extends WebImageView {
+
+    /**
+     * Optional additional OnClick Listener
+     */
+    private OnClickListener mOnClickListener;
+
+    public EnlargeableWebImageView(Context context) {
+        super(context);
+        init();
+    }
+
+    public EnlargeableWebImageView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public EnlargeableWebImageView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init();
+    }
+
+    /**
+     * Initialize ImageView
+     */
+    private void init(){
+
+        super.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+
+                //Call additional onclick listener if required
+                if(mOnClickListener != null)
+                    mOnClickListener.onClick(v);
+
+                openLargeImage();
+            }
+        });
+
+    }
+
+    @Override
+    public void setOnClickListener(OnClickListener onClickListener) {
+        this.mOnClickListener = onClickListener;
+    }
+
+    @Override
+    public boolean hasOnClickListeners() {
+        return mOnClickListener == null;
+    }
+
+    /**
+     * Open the image in large dimensions
+     */
+    public void openLargeImage(){
+
+        View view = LayoutInflater.from(getContext()).inflate(R.layout.dialog_image, null);
+        WebImageView image = view.findViewById(R.id.image);
+
+        //Apply the image to the dialog (if available)
+        if(hasImageURL()){
+            image.loadURL(getCurrURL());
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
+        builder.setView(view)
+                .show();
+
+
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/ui/views/WebImageView.java

@@ -42,25 +42,6 @@ public class WebImageView extends android.support.v7.widget.AppCompatImageView {
         super(context, attrs, defStyleAttr);
     }
 
-    /**
-     * Get the current default drawable for this view
-     *
-     * @return The default drawable
-     */
-    public int getDefaultDrawable() {
-        return mDefaultDrawable;
-    }
-
-    /**
-     * Set the default drawable for this view. This drawable will be used while the other one
-     * is loading
-     *
-     * @param defaultDrawable The default drawable
-     */
-    public void setDefaultDrawable(int defaultDrawable) {
-        this.mDefaultDrawable = defaultDrawable;
-    }
-
     /**
      * Load an image specified by its URL in the image
      *
@@ -90,4 +71,41 @@ public class WebImageView extends android.support.v7.widget.AppCompatImageView {
         mCurrURL = null;
         ImageLoadHelper.remove(this);
     }
+
+    /**
+     * Get the current default drawable for this view
+     *
+     * @return The default drawable
+     */
+    public int getDefaultDrawable() {
+        return mDefaultDrawable;
+    }
+
+    /**
+     * Set the default drawable for this view. This drawable will be used while the other one
+     * is loading
+     *
+     * @param defaultDrawable The default drawable
+     */
+    public void setDefaultDrawable(int defaultDrawable) {
+        this.mDefaultDrawable = defaultDrawable;
+    }
+
+    /**
+     * Get the current URL used in this image view
+     *
+     * @return The URL of the current image / null else
+     */
+    public String getCurrURL() {
+        return mCurrURL;
+    }
+
+    /**
+     * Check the current object has an image URL defined
+     *
+     * @return TRUE if a remote image as been set / FALSE else
+     */
+    public boolean hasImageURL(){
+        return  mCurrURL != null;
+    }
 }

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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<org.communiquons.android.comunic.client.ui.views.WebImageView android:src="@drawable/img_placeholder"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/image"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" />

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

@@ -42,7 +42,7 @@
             android:textColor="@color/conversation_otheruser_messages_textColor"
             tools:text="A message"/>
 
-        <ImageView
+        <org.communiquons.android.comunic.client.ui.views.EnlargeableWebImageView
             android:id="@+id/fragment_conversation_message_item_messageimage"
             android:layout_width="40dp"
             android:layout_height="40dp"