Support for scene transition from conversation to recipient prefs.

// FREEBIE

res/layout/conversation_title_view.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <org.thoughtcrime.securesms.ConversationTitleView
               xmlns:android="http://schemas.android.com/apk/res/android"
+              xmlns:tools="http://schemas.android.com/tools"
               android:orientation="vertical"
               android:layout_width="match_parent"
               android:layout_height="match_parent"
@@ -12,10 +13,12 @@
               android:layout_height="wrap_content"
               android:singleLine="true"
               android:ellipsize="end"
+              android:transitionName="recipient_name"
               android:drawablePadding="5dp"
               android:gravity="center_vertical"
               android:layout_gravity="center_vertical"
-              style="@style/TextSecure.TitleTextStyle"/>
+              style="@style/TextSecure.TitleTextStyle"
+              tools:ignore="UnusedAttribute"/>
 
     <TextView android:id="@+id/subtitle"
               android:layout_width="wrap_content"

res/layout/recipient_preference_activity.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              xmlns:tools="http://schemas.android.com/tools"
               android:orientation="vertical"
               android:layout_width="match_parent"
               android:layout_height="match_parent">
@@ -30,9 +31,11 @@
                       android:layout_width="wrap_content"
                       android:layout_height="wrap_content"
                       android:ellipsize="end"
+                      android:transitionName="recipient_name"
                       style="@style/TextSecure.TitleTextStyle"
                       android:layout_toRightOf="@id/avatar"
-                      android:layout_marginLeft="10dip"/>
+                      android:layout_marginLeft="10dip"
+                      tools:ignore="UnusedAttribute"/>
 
             <TextView android:id="@+id/blocked_indicator"
                       android:layout_width="wrap_content"

src/org/thoughtcrime/securesms/BaseActionBarActivity.java

@@ -1,10 +1,14 @@
 package org.thoughtcrime.securesms;
 
+import android.app.ActivityOptions;
+import android.content.Intent;
+import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
 import android.view.KeyEvent;
+import android.view.View;
 import android.view.ViewConfiguration;
 
 import java.lang.reflect.Field;
@@ -52,4 +56,12 @@ public abstract class BaseActionBarActivity extends AppCompatActivity {
       Log.w(TAG, "Failed to force overflow menu.");
     }
   }
+
+  protected void startActivitySceneTransition(Intent intent, View sharedView, String transitionName) {
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+      startActivity(intent, ActivityOptions.makeSceneTransitionAnimation(this, sharedView, transitionName).toBundle());
+    } else {
+      startActivity(intent);
+    }
+  }
 }

src/org/thoughtcrime/securesms/ConversationActivity.java

@@ -27,13 +27,11 @@ import android.os.AsyncTask;
 import android.os.Bundle;
 import android.provider.ContactsContract;
 import android.support.annotation.NonNull;
-import android.support.v7.app.ActionBar.LayoutParams;
 import android.text.Editable;
 import android.text.InputType;
 import android.text.TextWatcher;
 import android.util.Log;
 import android.view.KeyEvent;
-import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
@@ -750,7 +748,8 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       public void onClick(View v) {
         Intent intent = new Intent(ConversationActivity.this, RecipientPreferenceActivity.class);
         intent.putExtra(RecipientPreferenceActivity.RECIPIENTS_EXTRA, recipients.getIds());
-        startActivity(intent);
+
+        startActivitySceneTransition(intent, titleView.findViewById(R.id.title), "recipient_name");
       }
     });