Add MVP classes for messages

.idea/misc.xml

@@ -24,7 +24,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

mobile/src/main/java/de/vanitasvitae/slam/mvp/contracts/ConversationContract.java

@@ -23,6 +23,7 @@ import org.jxmpp.jid.EntityBareJid;
 import java.util.List;
 
 import de.vanitasvitae.slam.mvp.view.ConversationFragment;
+import de.vanitasvitae.slam.xmpp.message.AbstractMessage;
 
 /**
  * Model-View-Presenter contract for the {@link ConversationFragment}.
@@ -31,7 +32,7 @@ import de.vanitasvitae.slam.mvp.view.ConversationFragment;
 public interface ConversationContract {
 
     interface View {
-        void addMessageItems(List<Message> messages, boolean end);
+        void addMessageItems(List<AbstractMessage> messages, boolean end);
         void highlightMessageItem();
         void correctMessageItem();
         void navigateToContactProfile();

mobile/src/main/java/de/vanitasvitae/slam/mvp/contracts/message/AbstractMessageContract.java

@@ -0,0 +1,30 @@
+package de.vanitasvitae.slam.mvp.contracts.message;
+
+/**
+ * Model-View-Presenter contract for an abstract message.
+ */
+public interface AbstractMessageContract {
+
+    interface View {
+        void setDirection(Direction direction);
+        void setStatusSending();
+        void setStatusSendingFailed();
+        void setStatusSent();
+        void setStatusRead();
+        void setSelected();
+        void displayMessageInformation();
+        void displayErrorMessage();
+    }
+
+    interface Presenter {
+        void onDeleteMessage();
+        void onReadMessage();
+        void onMessageClick();
+        void onMessageLongClick();
+    }
+
+    enum Direction {
+        sent,       // We are the author (the message was sent from one of the users devices)
+        received,   // We are not the author
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/contracts/message/AudioMessageContract.java

@@ -0,0 +1,17 @@
+package de.vanitasvitae.slam.mvp.contracts.message;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public interface AudioMessageContract {
+
+    interface View extends MediaMessageContract.View {
+        void setWaveFormPreview();
+        void setLength(int seconds);
+        void updatePlayProgress(float percent);
+    }
+
+    interface Presenter extends MediaMessageContract.Presenter {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/contracts/message/ImageMessageContract.java

@@ -0,0 +1,16 @@
+package de.vanitasvitae.slam.mvp.contracts.message;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public interface ImageMessageContract {
+
+    interface View extends MediaMessageContract.View {
+        void setThumbnail();
+        void displayImage();
+    }
+
+    interface Presenter extends MediaMessageContract.Presenter {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/contracts/message/MediaMessageContract.java

@@ -0,0 +1,18 @@
+package de.vanitasvitae.slam.mvp.contracts.message;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public interface MediaMessageContract {
+
+    interface View extends AbstractMessageContract.View {
+        void setDownloadable(boolean downloadable);
+        void setDownloaded(boolean downloaded);
+        void updateDownloadProgress(float percent);
+        void setSize(int bytes);
+    }
+
+    interface Presenter extends AbstractMessageContract.Presenter{
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/contracts/message/TextMessageContract.java

@@ -0,0 +1,16 @@
+package de.vanitasvitae.slam.mvp.contracts.message;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public interface TextMessageContract {
+
+    interface View extends AbstractMessageContract.View {
+        void setContent(CharSequence content);
+        void setStatusCorrected();
+    }
+
+    interface Presenter extends AbstractMessageContract.Presenter {
+        void onCorrectMessage();
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/contracts/message/VideoMessageContract.java

@@ -0,0 +1,16 @@
+package de.vanitasvitae.slam.mvp.contracts.message;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public interface VideoMessageContract {
+
+    interface View extends MediaMessageContract.View {
+        void setThumbnail();
+        void displayVideo();
+    }
+
+    interface Presenter extends MediaMessageContract.Presenter {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/presenter/dummy/DummyLoginPresenter.java

@@ -72,7 +72,7 @@ public class DummyLoginPresenter implements LoginContract.Presenter {
             public void run() {
                 view.hideProgressIndicator();
             }
-        }, 2000);
+        }, 100);
 
         // startActivity
         handler.postDelayed(new Runnable() {
@@ -80,6 +80,6 @@ public class DummyLoginPresenter implements LoginContract.Presenter {
             public void run() {
                 view.navigateToMainActivity();
             }
-        }, 2500);
+        }, 250);
     }
 }

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/ContactDetailActivity.java

@@ -22,8 +22,8 @@ import android.support.design.widget.AppBarLayout;
 import android.support.design.widget.TabLayout;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
-import android.support.v4.view.ViewPager;
 import android.support.v7.widget.Toolbar;
+import android.view.MenuItem;
 
 import java.util.List;
 
@@ -34,12 +34,14 @@ import de.vanitasvitae.slam.R;
 import de.vanitasvitae.slam.mvp.PresenterFactory;
 import de.vanitasvitae.slam.mvp.contracts.ContactDetailContract;
 import de.vanitasvitae.slam.mvp.view.abstr.ThemedAppCompatActivity;
+import de.vanitasvitae.slam.ui.NonPagingViewPager;
 import de.vanitasvitae.slam.xmpp.Resource;
 
 /**
  * Main activity that hosts some fragments.
  */
-public class ContactDetailActivity extends ThemedAppCompatActivity implements ContactDetailContract.View, AppBarLayout.OnOffsetChangedListener {
+public class ContactDetailActivity extends ThemedAppCompatActivity
+        implements ContactDetailContract.View, AppBarLayout.OnOffsetChangedListener {
 
     public static final String TAG = "Slam!";
 
@@ -59,14 +61,14 @@ public class ContactDetailActivity extends ThemedAppCompatActivity implements Co
     TabLayout tabLayout;
 
     @BindView(R.id.contact_detail_viewpager)
-    ViewPager pager;
+    NonPagingViewPager pager;
 
     @BindView(R.id.contact_detail_profile_circle)
     CircleImageView profileCircle;
 
     private int mMaxScrollSize;
     private boolean isProfileCircleShown;
-    private int animateProfileCirclePercent = 20;
+    private int animateProfileCirclePercent = 30;
 
     public ContactDetailActivity() {
         this.presenter = PresenterFactory.getInstance().createContactDetailPresenter(this);
@@ -80,11 +82,22 @@ public class ContactDetailActivity extends ThemedAppCompatActivity implements Co
 
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+        getSupportActionBar().setDisplayShowTitleEnabled(false);
         appBarLayout.addOnOffsetChangedListener(this);
         pager.setAdapter(new DetailFragmentPagerAdapter(getSupportFragmentManager()));
         tabLayout.setupWithViewPager(pager);
     }
 
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                onBackPressed();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
     @Override
     public void onOffsetChanged(AppBarLayout appBarLayout, int i) {
         if (mMaxScrollSize == 0)
@@ -97,7 +110,8 @@ public class ContactDetailActivity extends ThemedAppCompatActivity implements Co
 
             profileCircle.animate()
                     .scaleY(0).scaleX(0)
-                    .setDuration(200)
+                    .alpha(0)
+                    .setDuration(300)
                     .start();
         }
 
@@ -106,6 +120,7 @@ public class ContactDetailActivity extends ThemedAppCompatActivity implements Co
 
             profileCircle.animate()
                     .scaleY(1).scaleX(1)
+                    .alpha(1)
                     .start();
         }
     }

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/ContactListFragment.java

@@ -109,7 +109,7 @@ public class ContactListFragment extends Fragment implements ContactListContract
         public void onBindViewHolder(ContactListEntry holder, int position) {
             final Contact contact = contacts.get(holder.getAdapterPosition());
             holder.bind(contact);
-            holder.setOnAvatarClickListener(new View.OnClickListener() {
+            holder.setOnEntryClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
                     navigateToContactDetail(contact.getJid());

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/ConversationFragment.java

@@ -42,7 +42,9 @@ import butterknife.ButterKnife;
 import de.vanitasvitae.slam.R;
 import de.vanitasvitae.slam.mvp.PresenterFactory;
 import de.vanitasvitae.slam.mvp.contracts.ConversationContract;
-import de.vanitasvitae.slam.ui.ChatMessageEntry;
+import de.vanitasvitae.slam.mvp.view.message.MessageAdapter;
+import de.vanitasvitae.slam.mvp.view.message.MessageView;
+import de.vanitasvitae.slam.xmpp.message.AbstractMessage;
 
 /**
  * Fragment that shows the conversation with a user.
@@ -57,26 +59,13 @@ public class ConversationFragment extends Fragment implements ConversationContra
     private final ConversationContract.Presenter presenter;
 
     Map<String, Integer> messageIdIndizes = new HashMap<>();
-    List<Message> messages = new ArrayList<>();
+    List<AbstractMessage> messages = new ArrayList<>();
 
-    private final RecyclerView.Adapter<ChatMessageEntry> chatMessageAdapter = new RecyclerView.Adapter<ChatMessageEntry>() {
+    private final MessageAdapter messageAdapter = new MessageAdapter(getContext()) {
-        @Override
-        public ChatMessageEntry onCreateViewHolder(ViewGroup parent, int viewType) {
-            View messageView = LayoutInflater.from(getActivity()).inflate(R.layout.item_conversation_message, parent, false);
-            return new ChatMessageEntry(messageView);
-        }
 
         @Override
-        public void onBindViewHolder(ChatMessageEntry holder, int position) {
+        public void onBindViewHolder(MessageView holder, int position) {
-            Message message = messages.get(position);
+            super.onBindViewHolder(holder, position);
-            String sender = message.getFrom().toString();
-            String role = "Member";
-            View content;
-            content = new TextView(getActivity());
-            ((TextView)content).setText(message.getBody());
-
-            holder.bind(sender, role, content, "now");
-
             holder.setOnAvatarClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
@@ -85,6 +74,11 @@ public class ConversationFragment extends Fragment implements ConversationContra
             });
         }
 
+        @Override
+        public AbstractMessage getItemAt(int position) {
+            return messages.get(position);
+        }
+
         @Override
         public int getItemCount() {
             return messages.size();
@@ -119,18 +113,18 @@ public class ConversationFragment extends Fragment implements ConversationContra
     @Override
     public void onViewCreated(final View view, Bundle savedInstanceState) {
         recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
-        recyclerView.setAdapter(chatMessageAdapter);
+        recyclerView.setAdapter(messageAdapter);
         recyclerView.getAdapter().notifyDataSetChanged();
     }
 
     @Override
-    public void addMessageItems(List<Message> messages, boolean end) {
+    public void addMessageItems(List<AbstractMessage> messages, boolean end) {
         if (end) {
             this.messages.addAll(messages);
         } else {
             this.messages.addAll(0, messages);
         }
-        chatMessageAdapter.notifyDataSetChanged();
+        messageAdapter.notifyDataSetChanged();
     }
 
     @Override

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/message/AudioMessageView.java

@@ -0,0 +1,36 @@
+package de.vanitasvitae.slam.mvp.view.message;
+
+import android.view.View;
+
+import de.vanitasvitae.slam.mvp.contracts.message.AudioMessageContract;
+import de.vanitasvitae.slam.xmpp.message.AudioMessage;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class AudioMessageView extends MediaMessageView<AudioMessage> implements AudioMessageContract.View {
+
+    public AudioMessageView(View itemView) {
+        super(itemView);
+    }
+
+    @Override
+    public void bind(AudioMessage message) {
+
+    }
+
+    @Override
+    public void setWaveFormPreview() {
+
+    }
+
+    @Override
+    public void setLength(int seconds) {
+
+    }
+
+    @Override
+    public void updatePlayProgress(float percent) {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/message/ImageMessageView.java

@@ -0,0 +1,31 @@
+package de.vanitasvitae.slam.mvp.view.message;
+
+import android.view.View;
+
+import de.vanitasvitae.slam.mvp.contracts.message.ImageMessageContract;
+import de.vanitasvitae.slam.xmpp.message.ImageMessage;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class ImageMessageView extends MediaMessageView<ImageMessage> implements ImageMessageContract.View {
+
+    public ImageMessageView(View itemView) {
+        super(itemView);
+    }
+
+    @Override
+    public void bind(ImageMessage message) {
+
+    }
+
+    @Override
+    public void setThumbnail() {
+
+    }
+
+    @Override
+    public void displayImage() {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/message/MediaMessageView.java

@@ -0,0 +1,78 @@
+package de.vanitasvitae.slam.mvp.view.message;
+
+import android.view.View;
+
+import de.vanitasvitae.slam.mvp.contracts.message.AbstractMessageContract;
+import de.vanitasvitae.slam.mvp.contracts.message.MediaMessageContract;
+import de.vanitasvitae.slam.xmpp.message.MediaMessage;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public abstract class MediaMessageView<T extends MediaMessage> extends MessageView<T>
+        implements MediaMessageContract.View {
+
+    public MediaMessageView(View itemView) {
+        super(itemView);
+    }
+
+    @Override
+    public void setDirection(AbstractMessageContract.Direction direction) {
+
+    }
+
+    @Override
+    public void setStatusSending() {
+
+    }
+
+    @Override
+    public void setStatusSendingFailed() {
+
+    }
+
+    @Override
+    public void setStatusSent() {
+
+    }
+
+    @Override
+    public void setStatusRead() {
+
+    }
+
+    @Override
+    public void setSelected() {
+
+    }
+
+    @Override
+    public void displayMessageInformation() {
+
+    }
+
+    @Override
+    public void displayErrorMessage() {
+
+    }
+
+    @Override
+    public void setDownloadable(boolean downloadable) {
+
+    }
+
+    @Override
+    public void setDownloaded(boolean downloaded) {
+
+    }
+
+    @Override
+    public void updateDownloadProgress(float percent) {
+
+    }
+
+    @Override
+    public void setSize(int bytes) {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/message/MessageAdapter.java

@@ -0,0 +1,87 @@
+package de.vanitasvitae.slam.mvp.view.message;
+
+import android.content.Context;
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+import android.view.ViewGroup;
+
+import de.vanitasvitae.slam.R;
+import de.vanitasvitae.slam.xmpp.message.AbstractMessage;
+import de.vanitasvitae.slam.xmpp.message.AudioMessage;
+import de.vanitasvitae.slam.xmpp.message.ImageMessage;
+import de.vanitasvitae.slam.xmpp.message.TextMessage;
+import de.vanitasvitae.slam.xmpp.message.VideoMessage;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public abstract class MessageAdapter extends RecyclerView.Adapter<MessageView> {
+
+    public static final int
+            TYPE_TEXT   = 0,
+            TYPE_IMAGE  = 1,
+            TYPE_VIDEO  = 2,
+            TYPE_AUDIO  = 3;
+
+    private Context context;
+
+    public MessageAdapter(Context context) {
+        this.context = context;
+    }
+
+    @Override
+    public MessageView onCreateViewHolder(ViewGroup parent, int viewType) {
+
+        View layout;
+        switch (viewType) {
+            case TYPE_TEXT:
+                layout = View.inflate(context, R.layout.item_conversation_message, null);
+                return new TextMessageView(layout);
+
+            case TYPE_IMAGE:
+                layout = View.inflate(context, R.layout.item_conversation_message, null);
+                return new ImageMessageView(layout);
+
+            case TYPE_VIDEO:
+                layout = View.inflate(context, R.layout.item_conversation_message, null);
+                return new VideoMessageView(layout);
+
+            case TYPE_AUDIO:
+                layout = View.inflate(context, R.layout.item_conversation_message, null);
+                return new AudioMessageView(layout);
+        }
+
+        throw new IllegalArgumentException("Illegal viewType: " + viewType);
+    }
+
+    @Override
+    public void onBindViewHolder(MessageView holder, int position) {
+        AbstractMessage message = getItemAt(position);
+        holder.bind(message);
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        AbstractMessage message = getItemAt(position);
+
+        if (message instanceof TextMessage) {
+            return TYPE_TEXT;
+        }
+
+        if (message instanceof ImageMessage) {
+            return TYPE_IMAGE;
+        }
+
+        if (message instanceof VideoMessage) {
+            return TYPE_VIDEO;
+        }
+
+        if (message instanceof AudioMessage) {
+            return TYPE_AUDIO;
+        }
+
+        return -1; // ERROR
+    }
+
+    public abstract AbstractMessage getItemAt(int position);
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/message/MessageView.java

@@ -15,32 +15,72 @@
  * along with this program; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  */
-package de.vanitasvitae.slam.ui;
+package de.vanitasvitae.slam.mvp.view.message;
 
 import android.support.v7.widget.RecyclerView;
 import android.view.View;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
+import com.google.protobuf.Message;
+
 import de.vanitasvitae.slam.R;
+import de.vanitasvitae.slam.mvp.contracts.message.AbstractMessageContract;
+import de.vanitasvitae.slam.xmpp.message.AbstractMessage;
 
 /**
  * Created by Paul Schaub on 30.01.18.
  */
-public class ChatMessageEntry extends RecyclerView.ViewHolder {
+public abstract class MessageView<T extends AbstractMessage> extends RecyclerView.ViewHolder
+        implements AbstractMessageContract.View {
 
-    public ChatMessageEntry(View itemView) {
+    public MessageView(View itemView) {
         super(itemView);
     }
 
-    public void bind(String sender, String role, View content, String date) {
+    public abstract void bind(T message);
-        ((TextView)itemView.findViewById(R.id.message_sender)).setText(sender);
-        ((TextView)itemView.findViewById(R.id.message_sender_role)).setText(role);
-        ((RelativeLayout)itemView.findViewById(R.id.message_content)).addView(content);
-        ((TextView)itemView.findViewById(R.id.message_date)).setText(date);
-    }
 
     public void setOnAvatarClickListener(View.OnClickListener listener) {
         itemView.findViewById(R.id.contact_image).setOnClickListener(listener);
     }
+
+    @Override
+    public void setDirection(AbstractMessageContract.Direction direction) {
+
+    }
+
+    @Override
+    public void setStatusSending() {
+
+    }
+
+    @Override
+    public void setStatusSendingFailed() {
+
+    }
+
+    @Override
+    public void setStatusSent() {
+
+    }
+
+    @Override
+    public void setStatusRead() {
+
+    }
+
+    @Override
+    public void setSelected() {
+
+    }
+
+    @Override
+    public void displayMessageInformation() {
+
+    }
+
+    @Override
+    public void displayErrorMessage() {
+
+    }
 }

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/message/TextMessageView.java

@@ -0,0 +1,32 @@
+package de.vanitasvitae.slam.mvp.view.message;
+
+import android.view.View;
+
+import de.vanitasvitae.slam.mvp.contracts.message.TextMessageContract;
+import de.vanitasvitae.slam.xmpp.message.TextMessage;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class TextMessageView extends MessageView<TextMessage>
+        implements TextMessageContract.View {
+
+    public TextMessageView(View itemView) {
+        super(itemView);
+    }
+
+    @Override
+    public void bind(TextMessage message) {
+
+    }
+
+    @Override
+    public void setContent(CharSequence content) {
+
+    }
+
+    @Override
+    public void setStatusCorrected() {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/mvp/view/message/VideoMessageView.java

@@ -0,0 +1,32 @@
+package de.vanitasvitae.slam.mvp.view.message;
+
+import android.view.View;
+
+import de.vanitasvitae.slam.mvp.contracts.message.VideoMessageContract;
+import de.vanitasvitae.slam.xmpp.message.VideoMessage;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class VideoMessageView extends MediaMessageView<VideoMessage>
+        implements VideoMessageContract.View {
+
+    public VideoMessageView(View itemView) {
+        super(itemView);
+    }
+
+    @Override
+    public void bind(VideoMessage message) {
+
+    }
+
+    @Override
+    public void setThumbnail() {
+
+    }
+
+    @Override
+    public void displayVideo() {
+
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/ui/NonPagingViewPager.java

@@ -0,0 +1,46 @@
+package de.vanitasvitae.slam.ui;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.v4.view.ViewPager;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+
+/**
+ * Created by Paul Schaub on 14.02.18.
+ */
+public class NonPagingViewPager extends ViewPager {
+
+    private boolean pagingEnabled = false;
+
+    public NonPagingViewPager(@NonNull Context context) {
+        super(context);
+    }
+
+    public NonPagingViewPager(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        if (this.pagingEnabled) {
+            return super.onTouchEvent(event);
+        }
+
+        return false;
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent event) {
+        if (this.pagingEnabled) {
+            return super.onInterceptTouchEvent(event);
+        }
+
+        return false;
+    }
+
+    public void setPagingEnabled(boolean enabled) {
+        this.pagingEnabled = enabled;
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/xmpp/SentReadMarker.java

@@ -0,0 +1,10 @@
+package de.vanitasvitae.slam.xmpp;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public enum SentReadMarker {
+    sending,
+    sent,
+    read
+}

mobile/src/main/java/de/vanitasvitae/slam/xmpp/message/AbstractMessage.java

@@ -0,0 +1,43 @@
+package de.vanitasvitae.slam.xmpp.message;
+
+import org.jxmpp.jid.Jid;
+
+import java.util.Date;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public abstract class AbstractMessage {
+
+    private final Jid sender;
+    private final Jid recipient;
+    private final Date sent;
+
+    private boolean read = false;
+
+    public AbstractMessage(Jid sender, Jid recipient, Date sent) {
+        this.sender = sender;
+        this.recipient = recipient;
+        this.sent = sent;
+    }
+
+    public Jid getSender() {
+        return sender;
+    }
+
+    public Jid getRecipient() {
+        return recipient;
+    }
+
+    public Date getSent() {
+        return sent;
+    }
+
+    public boolean isRead() {
+        return read;
+    }
+
+    public void setRead(boolean read) {
+        this.read = true;
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/xmpp/message/AudioMessage.java

@@ -0,0 +1,15 @@
+package de.vanitasvitae.slam.xmpp.message;
+
+import org.jxmpp.jid.Jid;
+
+import java.util.Date;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class AudioMessage extends MediaMessage {
+
+    public AudioMessage(Jid sender, Jid recipient, Date sent) {
+        super(sender, recipient, sent);
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/xmpp/message/ImageMessage.java

@@ -0,0 +1,15 @@
+package de.vanitasvitae.slam.xmpp.message;
+
+import org.jxmpp.jid.Jid;
+
+import java.util.Date;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class ImageMessage extends MediaMessage {
+
+    public ImageMessage(Jid sender, Jid recipient, Date sent) {
+        super(sender, recipient, sent);
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/xmpp/message/MediaMessage.java

@@ -0,0 +1,15 @@
+package de.vanitasvitae.slam.xmpp.message;
+
+import org.jxmpp.jid.Jid;
+
+import java.util.Date;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public abstract class MediaMessage extends AbstractMessage {
+
+    public MediaMessage(Jid sender, Jid recipient, Date sent) {
+        super(sender, recipient, sent);
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/xmpp/message/TextMessage.java

@@ -0,0 +1,22 @@
+package de.vanitasvitae.slam.xmpp.message;
+
+import org.jxmpp.jid.Jid;
+
+import java.util.Date;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class TextMessage extends AbstractMessage {
+
+    private String content;
+
+    public TextMessage(Jid sender, Jid recipient, String content, Date sent) {
+        super(sender, recipient, sent);
+        this.content = content;
+    }
+
+    public String getContent() {
+        return content;
+    }
+}

mobile/src/main/java/de/vanitasvitae/slam/xmpp/message/VideoMessage.java

@@ -0,0 +1,15 @@
+package de.vanitasvitae.slam.xmpp.message;
+
+import org.jxmpp.jid.Jid;
+
+import java.util.Date;
+
+/**
+ * Created by Paul Schaub on 23.02.18.
+ */
+public class VideoMessage extends MediaMessage {
+
+    public VideoMessage(Jid sender, Jid recipient, Date sent) {
+        super(sender, recipient, sent);
+    }
+}

mobile/src/main/res/layout/activity_contact_detail.xml

@@ -35,7 +35,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:minHeight="?attr/actionBarSize"
-            app:layout_scrollFlags="scroll|enterAlways|snap"
+            app:layout_scrollFlags="scroll|enterAlways"
             />
 
         <LinearLayout
@@ -45,7 +45,7 @@
             android:orientation="vertical"
             android:paddingTop="8dp"
             android:gravity="center"
-            app:layout_scrollFlags="scroll|enterAlways|snap"
+            app:layout_scrollFlags="scroll|enterAlways"
             >
 
             <TextView
@@ -77,22 +77,22 @@
             />
     </android.support.design.widget.AppBarLayout>
 
-    <android.support.v4.view.ViewPager
+    <android.support.v4.widget.NestedScrollView
-        android:id="@+id/contact_detail.viewpager"
+        android:id="@+id/contact_detail.nested_scroll_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior"
+        android:fillViewport="true"
-        />
+        android:layout_gravity="fill_vertical"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
-    <android.support.design.widget.FloatingActionButton
+        <de.vanitasvitae.slam.ui.NonPagingViewPager
-        android:layout_height="wrap_content"
+            android:id="@+id/contact_detail.viewpager"
-        android:layout_width="wrap_content"
+            android:layout_width="match_parent"
-        android:elevation="8dp"
+            android:layout_height="match_parent"
-        android:layout_gravity="bottom|right|end"
+            app:layout_behavior="@string/appbar_scrolling_view_behavior"
-        android:src="@drawable/ic_chat_white_48dp"
+            />
-        android:layout_margin="@dimen/activity_horizontal_margin"
+
-        android:clickable="true"
+    </android.support.v4.widget.NestedScrollView>
-        android:focusable="true" />
 
     <de.hdodenhof.circleimageview.CircleImageView
         android:id="@+id/contact_detail.profile_circle"