Set filter title and theme color in recent apps

src/main/java/com/todoroo/astrid/activity/TaskListActivity.java

@@ -180,6 +180,7 @@ public class TaskListActivity extends InjectingAppCompatActivity implements
                 .replace(isDoublePaneLayout() ? R.id.master_dual : R.id.single_pane, taskListFragment, TaskListFragment.TAG_TASKLIST_FRAGMENT)
                 .addToBackStack(TaskListFragment.TAG_TASKLIST_FRAGMENT)
                 .commit();
+        themeApplicator.applyTaskDescription(taskListFragment.filter.listingTitle);
     }
 
     private void loadTaskEditFragment(boolean onCreate, TaskEditFragment taskEditFragment, List<TaskEditControlFragment> taskEditControlFragments) {

src/main/java/org/tasks/preferences/ThemeApplicator.java

@@ -1,8 +1,11 @@
 package org.tasks.preferences;
 
 import android.app.Activity;
+import android.app.ActivityManager;
 import android.graphics.PixelFormat;
 
+import org.tasks.R;
+
 import javax.inject.Inject;
 
 import static com.todoroo.andlib.utility.AndroidUtilities.atLeastLollipop;
@@ -20,12 +23,20 @@ public class ThemeApplicator {
     public void applyThemeAndStatusBarColor() {
         applyTheme();
         applyStatusBarColor();
+        applyTaskDescription(activity.getString(R.string.app_name));
     }
 
     public void applyTheme() {
         applyTheme(themeManager.getBaseTheme());
     }
 
+    public void applyTaskDescription(String description) {
+        if (atLeastLollipop()) {
+            Theme colorTheme = themeManager.getColorTheme();
+            activity.setTaskDescription(new ActivityManager.TaskDescription(description, null, colorTheme.getPrimaryColor()));
+        }
+    }
+
     private void applyTheme(Theme theme) {
         activity.setTheme(theme.getResId());
         themeManager.applyThemeToContext(activity);