Add SharedElement avatar

app/src/main/java/app/insti/DetailsTransition.java

+package app.insti;
+
+import android.support.transition.ChangeBounds;
+import android.support.transition.ChangeImageTransform;
+import android.support.transition.ChangeTransform;
+import android.support.transition.TransitionSet;
+
+public class DetailsTransition extends TransitionSet {
+    public DetailsTransition() {
+        setOrdering(ORDERING_TOGETHER);
+        addTransition(new ChangeBounds()).
+                addTransition(new ChangeTransform()).
+                addTransition(new ChangeImageTransform());
+    }
+}

app/src/main/java/app/insti/Utils.java

@@ -4,9 +4,13 @@ import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.support.transition.Fade;
+import android.support.transition.Slide;
+import android.support.transition.Transition;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentTransaction;
+import android.view.View;
 import android.widget.ImageView;
 import android.widget.Toast;
 
@@ -14,6 +18,9 @@ import com.google.gson.Gson;
 import com.squareup.picasso.Callback;
 import com.squareup.picasso.Picasso;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import app.insti.activity.MainActivity;
 import app.insti.api.RetrofitInterface;
 import app.insti.api.model.Body;
@@ -21,6 +28,7 @@ import app.insti.api.model.Event;
 import app.insti.api.model.User;
 import app.insti.fragment.BodyFragment;
 import app.insti.fragment.EventFragment;
+import app.insti.fragment.TransitionTargetFragment;
 import app.insti.fragment.UserFragment;
 
 public final class Utils {
@@ -71,29 +79,108 @@ public final class Utils {
         ft.commit();
     }
 
-    public static void openBodyFragment(Body body, FragmentActivity fragmentActivity) {
+    public static void updateSharedElementFragment(final TransitionTargetFragment ttFragment, Fragment currentFragment, Map<View, String> sharedElements) {
+        Fragment fragment = (Fragment) ttFragment;
+        FragmentTransaction ft = currentFragment.getActivity().getSupportFragmentManager().beginTransaction();
+
+        Transition transition = new DetailsTransition();
+
+        /* Set up transitions */
+        fragment.setSharedElementEnterTransition(transition);
+        fragment.setEnterTransition(new Slide());
+        currentFragment.setExitTransition(new Fade());
+        fragment.setSharedElementReturnTransition(new DetailsTransition());
+
+        transition.addListener(new Transition.TransitionListener() {
+            @Override
+            public void onTransitionStart(Transition transition) {
+            }
+
+            @Override
+            public void onTransitionEnd(Transition transition) {
+                ttFragment.transitionEnd();
+            }
+
+            @Override
+            public void onTransitionCancel(Transition transition) {}
+
+            @Override
+            public void onTransitionPause(Transition transition) {}
+
+            @Override
+            public void onTransitionResume(Transition transition) {}
+        });
+
+        /* Add all shared elements */
+        for (Map.Entry<View, String> entry : sharedElements.entrySet()) {
+            ft.addSharedElement(entry.getKey(), entry.getValue());
+        }
+
+        /* Update the fragment */
+        ft.replace(R.id.framelayout_for_fragment, fragment, fragment.getTag())
+                .addToBackStack(fragment.getTag())
+                .commit();
+    }
+
+    public static BodyFragment getBodyFragment(Body body) {
         Bundle bundle = new Bundle();
         bundle.putString(Constants.BODY_JSON, new Gson().toJson(body));
         BodyFragment bodyFragment = new BodyFragment();
         bodyFragment.setArguments(bundle);
-        updateFragment(bodyFragment, fragmentActivity);
+        return bodyFragment;
     }
 
-    public static void openEventFragment(Event event, FragmentActivity fragmentActivity) {
+    public static void openBodyFragment(Body body, FragmentActivity fragmentActivity) {
+        updateFragment(getBodyFragment(body), fragmentActivity);
+    }
+
+    public static void openBodyFragment(Body body, Fragment currentFragment, View sharedAvatar) {
+        Map<View, String> sharedElements = new HashMap<>();
+        sharedElements.put(sharedAvatar, "sharedAvatar");
+        updateSharedElementFragment(
+                getBodyFragment(body), currentFragment, sharedElements
+        );
+    }
+
+    public static EventFragment getEventFragment(Event event) {
         String eventJson = new Gson().toJson(event);
         Bundle bundle = new Bundle();
         bundle.putString(Constants.EVENT_JSON, eventJson);
         EventFragment eventFragment = new EventFragment();
         eventFragment.setArguments(bundle);
-        updateFragment(eventFragment, fragmentActivity);
+        return eventFragment;
     }
 
-    public static void openUserFragment(User user, FragmentActivity fragmentActivity) {
+    public static void openEventFragment(Event event, FragmentActivity fragmentActivity) {
+        updateFragment(getEventFragment(event), fragmentActivity);
+    }
+
+    public static void openEventFragment(Event event, Fragment currentFragment, View sharedAvatar) {
+        Map<View, String> sharedElements = new HashMap<>();
+        sharedElements.put(sharedAvatar, "sharedAvatar");
+        updateSharedElementFragment(
+                getEventFragment(event), currentFragment, sharedElements
+        );
+    }
+
+    public static UserFragment getUserFragment(User user) {
         Bundle bundle = new Bundle();
         bundle.putString(Constants.USER_ID, user.getUserID());
         UserFragment userFragment = new UserFragment();
         userFragment.setArguments(bundle);
-        updateFragment(userFragment, fragmentActivity);
+        return userFragment;
+    }
+
+    public static void openUserFragment(User user, FragmentActivity fragmentActivity) {
+        updateFragment(getUserFragment(user), fragmentActivity);
+    }
+
+    public static void openUserFragment(User user, Fragment currentFragment, View sharedAvatar) {
+        Map<View, String> sharedElements = new HashMap<>();
+        sharedElements.put(sharedAvatar, "sharedAvatar");
+        updateSharedElementFragment(
+                getUserFragment(user), currentFragment, sharedElements
+        );
     }
 
     public static void setSessionId(String sessionId1) {

app/src/main/java/app/insti/adapter/BodyAdapter.java

 package app.insti.adapter;
 
 import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentActivity;
+import android.view.View;
 
 import java.util.List;
 
+import app.insti.R;
 import app.insti.Utils;
 import app.insti.api.model.Body;
 
@@ -15,7 +16,7 @@ public class BodyAdapter extends CardAdapter<Body> {
         super(bodyList, mFragment);
     }
 
-    public void onClick(Body body, FragmentActivity fragmentActivity) {
-        Utils.openBodyFragment(body, fragmentActivity);
+    public void onClick(Body body, Fragment fragment, View view) {
+        Utils.openBodyFragment(body, fragment, view.findViewById(R.id.object_picture));
     }
 }

app/src/main/java/app/insti/adapter/CardAdapter.java

@@ -25,7 +25,8 @@ public abstract class CardAdapter<T extends CardInterface> extends RecyclerView.
     private List<T> tList;
     private Fragment mFragment;
 
-    public abstract void onClick(T t, FragmentActivity fragmentActivity);
+    public void onClick(T t, FragmentActivity fragmentActivity) {};
+    public void onClick(T t, Fragment fragment, View view) {}
 
     public String getBigImageUrl(T t) {
         return null;
@@ -52,6 +53,7 @@ public abstract class CardAdapter<T extends CardInterface> extends RecyclerView.
             @Override
             public void onClick(View view) {
                 CardAdapter.this.onClick(tList.get(postViewHolder.getAdapterPosition()), mFragment.getActivity());
+                CardAdapter.this.onClick(tList.get(postViewHolder.getAdapterPosition()), mFragment, view);
             }
         });
 
@@ -64,9 +66,13 @@ public abstract class CardAdapter<T extends CardInterface> extends RecyclerView.
         viewHolder.title.setText(t.getTitle());
         viewHolder.subtitle.setText(t.getSubtitle());
 
+        // Set transition names
+        viewHolder.avatar.setTransitionName(Integer.toString(t.getTitle().hashCode()) + "_sharedAvatar");
+
         if (getBigImageUrl(t) != null) {
             // Show big image, hide avatar
             viewHolder.bigPicture.setVisibility(View.VISIBLE);
+            viewHolder.bigPicture.setTransitionName(Integer.toString(t.getTitle().hashCode()) + "_sharedBigPicture");
             viewHolder.avatar.setVisibility(View.GONE);
 
             // Load big image with low resolution as avatar

app/src/main/java/app/insti/adapter/FeedAdapter.java

@@ -2,6 +2,7 @@ package app.insti.adapter;
 
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
+import android.view.View;
 
 import java.util.List;
 
@@ -10,14 +11,20 @@ import app.insti.Utils;
 import app.insti.api.model.Event;
 
 public class FeedAdapter extends CardAdapter<Event> {
-
     public FeedAdapter(List<Event> eventList, Fragment fragment) {
         super(eventList, fragment);
     }
 
     @Override
-    public void onClick(Event event, FragmentActivity fragmentActivity) {
-        Utils.openEventFragment(event, fragmentActivity);
+    public void onClick(Event event, FragmentActivity fragmentActivity) {}
+
+    @Override
+    public void onClick(Event event, final Fragment fragment, View view) {
+        int picId = R.id.object_picture;
+        if (event.isEventBigImage()) {
+            picId = R.id.big_object_picture;
+        }
+        Utils.openEventFragment(event, fragment, view.findViewById(picId));
     }
 
     @Override

app/src/main/java/app/insti/adapter/GenericAdapter.java

 package app.insti.adapter;
 
 import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentActivity;
+import android.view.View;
 
 import java.util.List;
 
@@ -13,19 +13,18 @@ import app.insti.api.model.User;
 import app.insti.interfaces.CardInterface;
 
 public class GenericAdapter extends CardAdapter<CardInterface> {
-
     public GenericAdapter(List<CardInterface> cardInterfaceList, Fragment fragment){
         super(cardInterfaceList, fragment);
     }
 
     @Override
-    public void onClick(CardInterface cardInterface, FragmentActivity fragmentActivity) {
+    public void onClick(CardInterface cardInterface, Fragment fragment, View view) {
         if (cardInterface instanceof Event) {
-            Utils.openEventFragment((Event) cardInterface, fragmentActivity);
+            Utils.openEventFragment((Event) cardInterface, fragment, view.findViewById(R.id.object_picture));
         } else if (cardInterface instanceof Body) {
-            Utils.openBodyFragment((Body) cardInterface, fragmentActivity);
+            Utils.openBodyFragment((Body) cardInterface, fragment, view.findViewById(R.id.object_picture));
         } else if (cardInterface instanceof User) {
-            Utils.openUserFragment((User) cardInterface, fragmentActivity);
+            Utils.openUserFragment((User) cardInterface, fragment, view.findViewById(R.id.object_picture));
         }
     }
 

app/src/main/java/app/insti/adapter/RoleAdapter.java

 package app.insti.adapter;
 
 import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentActivity;
+import android.view.View;
 
 import java.util.List;
 
+import app.insti.R;
 import app.insti.Utils;
 import app.insti.api.model.Role;
 
@@ -16,7 +17,7 @@ public class RoleAdapter extends CardAdapter<Role> {
     }
 
     @Override
-    public void onClick(Role role, FragmentActivity fragmentActivity) {
-        Utils.openBodyFragment(role.getRoleBodyDetails(), fragmentActivity);
+    public void onClick(Role role, Fragment fragment, View view) {
+        Utils.openBodyFragment(role.getRoleBodyDetails(), fragment, view.findViewById(R.id.object_picture));
     }
 }

app/src/main/java/app/insti/adapter/UserAdapter.java

 package app.insti.adapter;
 
 import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentActivity;
+import android.view.View;
 
 import java.util.List;
 
@@ -16,8 +16,8 @@ public class UserAdapter extends CardAdapter<User> {
     }
 
     @Override
-    public void onClick(User user, FragmentActivity fragmentActivity) {
-        Utils.openUserFragment(user, fragmentActivity);
+    public void onClick(User user, Fragment fragment, View view) {
+        Utils.openUserFragment(user, fragment, view.findViewById(R.id.object_picture));
     }
 
     @Override

app/src/main/java/app/insti/fragment/BodyFragment.java

@@ -29,8 +29,8 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import com.google.gson.Gson;
+import com.squareup.picasso.Picasso;
 
-import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -57,7 +57,7 @@ import ru.noties.markwon.Markwon;
  * Use the {@link BodyFragment#newInstance} factory method to
  * create an instance of this fragment.
  */
-public class BodyFragment extends BackHandledFragment {
+public class BodyFragment extends BackHandledFragment implements TransitionTargetFragment {
     // TODO: Rename parameter arguments, choose names that match
     // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
 
@@ -83,6 +83,7 @@ public class BodyFragment extends BackHandledFragment {
     private ImageView bodyPicture;
     private Body body;
     private boolean bodyDisplayed = false;
+    private boolean transitionEnded = false;
 
     public BodyFragment() {
         // Required empty public constructor
@@ -122,6 +123,13 @@ public class BodyFragment extends BackHandledFragment {
         }
     }
 
+    @Override
+    public void transitionEnd() {
+        bodyPicture = (ImageView) getActivity().findViewById(R.id.body_picture);
+        Utils.loadImageWithPlaceholder(bodyPicture, body.getBodyImageURL());
+        transitionEnded = true;
+    }
+
     @Override
     public void onStart() {
         super.onStart();
@@ -201,7 +209,14 @@ public class BodyFragment extends BackHandledFragment {
         /* Set body information */
         bodyName.setText(body.getBodyName());
         bodySubtitle.setText(body.getBodyShortDescription());
-        Utils.loadImageWithPlaceholder(bodyPicture, body.getBodyImageURL());
+
+        /* Load only low res image if transition is not completed */
+        if (transitionEnded) {
+            Utils.loadImageWithPlaceholder(bodyPicture, body.getBodyImageURL());
+        } else {
+            Picasso.get().load(Utils.resizeImageUrl(body.getBodyImageURL())).into(bodyPicture);
+        }
+
 
         bodyPicture.setOnClickListener(new View.OnClickListener() {
             @Override

app/src/main/java/app/insti/fragment/EventFragment.java

@@ -33,6 +33,7 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import com.google.gson.Gson;
+import com.squareup.picasso.Picasso;
 
 import java.sql.Timestamp;
 import java.text.SimpleDateFormat;
@@ -57,7 +58,7 @@ import ru.noties.markwon.Markwon;
 /**
  * A simple {@link Fragment} subclass.
  */
-public class EventFragment extends BackHandledFragment {
+public class EventFragment extends BackHandledFragment implements TransitionTargetFragment {
     Event event;
     Button goingButton;
     Button interestedButton;
@@ -86,6 +87,11 @@ public class EventFragment extends BackHandledFragment {
         // Required empty public constructor
     }
 
+    @Override
+    public void transitionEnd() {
+        Utils.loadImageWithPlaceholder(eventPicture, event.getEventImageURL());
+    }
+
     /**
      * Get a spannable with a small count badge to set for an element text
      *
@@ -152,7 +158,11 @@ public class EventFragment extends BackHandledFragment {
         webEventButton = getActivity().findViewById(R.id.web_event_button);
         shareEventButton = getActivity().findViewById(R.id.share_event_button);
 
-        Utils.loadImageWithPlaceholder(eventPicture, event.getEventImageURL());
+        if (event.isEventBigImage()) {
+            Picasso.get().load(event.getEventImageURL()).into(eventPicture);
+        } else {
+            Picasso.get().load(Utils.resizeImageUrl(event.getEventImageURL())).into(eventPicture);
+        }
 
         eventTitle.setText(event.getEventName());
         Markwon.setMarkdown(eventDescription, event.getEventDescription());

app/src/main/java/app/insti/fragment/TransitionTargetFragment.java

+package app.insti.fragment;
+
+public interface TransitionTargetFragment {
+    void transitionEnd();
+}

app/src/main/java/app/insti/fragment/UserFragment.java

@@ -14,8 +14,6 @@ import android.os.Bundle;
 import android.support.design.widget.TabLayout;
 import android.support.v4.app.Fragment;
 import android.support.v4.view.ViewPager;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.Toolbar;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -33,14 +31,12 @@ import app.insti.Constants;
 import app.insti.R;
 import app.insti.ShareURLMaker;
 import app.insti.Utils;
-import app.insti.adapter.RoleAdapter;
 import app.insti.adapter.TabAdapter;
 import app.insti.api.RetrofitInterface;
 import app.insti.api.model.Body;
 import app.insti.api.model.Event;
 import app.insti.api.model.Role;
 import app.insti.api.model.User;
-import app.insti.interfaces.ItemClickListener;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -50,7 +46,7 @@ import static android.view.View.VISIBLE;
 /**
  * A simple {@link Fragment} subclass.
  */
-public class UserFragment extends BackHandledFragment {
+public class UserFragment extends BackHandledFragment implements TransitionTargetFragment {
     private User user;
 
     // Hold a reference to the current animator,
@@ -86,6 +82,9 @@ public class UserFragment extends BackHandledFragment {
         return inflater.inflate(R.layout.fragment_user, container, false);
     }
 
+    @Override
+    public void transitionEnd() {}
+
     @Override
     public boolean onBackPressed() {
         if (zoomMode) {

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

@@ -35,7 +35,8 @@
                         android:layout_height="0dp"
                         android:layout_weight="1"
                         android:adjustViewBounds="true"
-                        android:scaleType="fitCenter" />
+                        android:scaleType="fitCenter"
+                        android:transitionName="sharedAvatar" />
 
                     <android.support.v7.widget.CardView
                         android:layout_width="match_parent"

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

@@ -31,7 +31,8 @@
                         android:layout_width="match_parent"
                         android:layout_height="300dp"
                         android:adjustViewBounds="true"
-                        android:scaleType="centerCrop" />
+                        android:scaleType="centerCrop"
+                        android:transitionName="sharedAvatar" />
 
                     <android.support.v7.widget.CardView
                         android:layout_width="match_parent"

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

@@ -18,7 +18,8 @@
                 android:layout_width="100dp"
                 android:layout_height="100dp"
                 android:layout_margin="20dp"
-                android:layout_marginRight="15dp" />
+                android:layout_marginRight="15dp"
+                android:transitionName="sharedAvatar" />
 
             <LinearLayout
                 android:layout_width="wrap_content"