Fixed typo

Removed CircularRevealChangeHandler from the core project

README.md

@@ -20,14 +20,14 @@ Conductor is architecture-agnostic and does not try to force any design decision
 ## Installation
 
 ```gradle
-compile 'com.bluelinelabs:conductor:1.1.0'
+compile 'com.bluelinelabs:conductor:1.1.3'
 
 // If you want the components that go along with
 // Android's support libraries (currently just a PagerAdapter):
-compile 'com.bluelinelabs:conductor-support:1.1.0'
+compile 'com.bluelinelabs:conductor-support:1.1.3'
 
 // If you want RxJava/RxAndroid lifecycle support:
-compile 'com.bluelinelabs:conductor-rxlifecycle:1.1.0'
+compile 'com.bluelinelabs:conductor-rxlifecycle:1.1.3'
 ```
 
 ## Components to Know

build.gradle

@@ -3,7 +3,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.5.0'
+        classpath 'com.android.tools.build:gradle:2.0.0'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3'
     }
 }

conductor/src/main/java/com/bluelinelabs/conductor/Controller.java

@@ -11,6 +11,9 @@ import android.os.Parcelable;
 import android.support.annotation.NonNull;
 import android.util.SparseArray;
 import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnAttachStateChangeListener;
 import android.view.ViewGroup;
@@ -18,6 +21,7 @@ import android.view.ViewGroup;
 import com.bluelinelabs.conductor.ControllerTransaction.ControllerChangeType;
 import com.bluelinelabs.conductor.changehandler.SimpleSwapChangeHandler;
 import com.bluelinelabs.conductor.internal.ClassUtils;
+import com.bluelinelabs.conductor.internal.RouterRequiringFunc;
 
 import java.lang.reflect.Constructor;
 import java.util.ArrayList;
@@ -53,6 +57,8 @@ public abstract class Controller {
     private boolean mIsBeingDestroyed;
     private boolean mDestroyed;
     private boolean mAttached;
+    private boolean mHasOptionsMenu;
+    private boolean mOptionsMenuHidden;
     private boolean mViewIsAttached;
     private Router mRouter;
     private View mView;
@@ -66,6 +72,7 @@ public abstract class Controller {
     private final List<ChildControllerTransaction> mChildControllers = new ArrayList<>();
     private final List<LifecycleListener> mLifecycleListeners = new ArrayList<>();
     private final ArrayList<String> mRequestedPermissions = new ArrayList<>();
+    private final ArrayList<RouterRequiringFunc> mOnRouterSetListeners = new ArrayList<>();
 
     static Controller newInstance(Bundle bundle) {
         final String className = bundle.getString(KEY_CLASS_NAME);
@@ -112,7 +119,7 @@ public abstract class Controller {
      * for this method will be {@code return inflater.inflate(R.layout.my_layout, container, false);}, plus
      * any binding code.
      *
-     * @param inflater The LayoutInflater that should be used to inflate views
+     * @param inflater  The LayoutInflater that should be used to inflate views
      * @param container The parent view that this Controller's view will eventually be attached to.
      *                  This Controller's view should NOT be added in this method. It is simply passed in
      *                  so that valid LayoutParams can be used during inflation.
@@ -307,7 +314,7 @@ public abstract class Controller {
      * Called when this Controller begins the process of being swapped in or out of the host view.
      *
      * @param changeHandler The {@link ControllerChangeHandler} that's managing the swap
-     * @param changeType The type of change that's occurring
+     * @param changeType    The type of change that's occurring
      */
     protected void onChangeStarted(@NonNull ControllerChangeHandler changeHandler, @NonNull ControllerChangeType changeType) { }
 
@@ -315,7 +322,7 @@ public abstract class Controller {
      * Called when this Controller completes the process of being swapped in or out of the host view.
      *
      * @param changeHandler The {@link ControllerChangeHandler} that's managing the swap
-     * @param changeType The type of change that occurred
+     * @param changeType    The type of change that occurred
      */
     protected void onChangeEnded(@NonNull ControllerChangeHandler changeHandler, @NonNull ControllerChangeType changeType) { }
 
@@ -363,7 +370,7 @@ public abstract class Controller {
      * Controller lifecycle (ex: when another Controller has been pushed on top of it), care should be taken
      * to save anything needed to reconstruct the View.
      *
-     * @param view This Controller's View, passed for convenience
+     * @param view     This Controller's View, passed for convenience
      * @param outState The Bundle into which the View state should be saved
      */
     protected void onSaveViewState(@NonNull View view, @NonNull Bundle outState) { }
@@ -372,7 +379,7 @@ public abstract class Controller {
      * Restores data that was saved in the {@link #onSaveViewState(View, Bundle)} method. This should be overridden
      * to restore the View's state to where it was before it was destroyed.
      *
-     * @param view This Controller's View, passed for convenience
+     * @param view           This Controller's View, passed for convenience
      * @param savedViewState The bundle that has data to be restored
      */
     protected void onRestoreViewState(@NonNull View view, @NonNull Bundle savedViewState) { }
@@ -392,18 +399,43 @@ public abstract class Controller {
      */
     protected void onRestoreInstanceState(@NonNull Bundle savedInstanceState) { }
 
+    /**
+     * Calls startActivity(Intent) from this Controller's host Activity.
+     */
+    public final void startActivity(final Intent intent) {
+        executeWithRouter(new RouterRequiringFunc() {
+            @Override public void execute() { mRouter.getLifecycleHandler().startActivity(intent); }
+        });
+    }
+
     /**
      * Calls startActivityForResult(Intent, int) from this Controller's host Activity.
      */
-    public final void startActivityForResult(Intent intent, int requestCode) {
-        getRouter().getLifecycleHandler().startActivityForResult(mInstanceId, intent, requestCode);
+    public final void startActivityForResult(final Intent intent, final int requestCode) {
+        executeWithRouter(new RouterRequiringFunc() {
+            @Override public void execute() { mRouter.getLifecycleHandler().startActivityForResult(mInstanceId, intent, requestCode); }
+        });
     }
 
     /**
      * Calls startActivityForResult(Intent, int, Bundle) from this Controller's host Activity.
      */
-    public final void startActivityForResult(Intent intent, int requestCode, Bundle options) {
-        getRouter().getLifecycleHandler().startActivityForResult(mInstanceId, intent, requestCode, options);
+    public final void startActivityForResult(final Intent intent, final int requestCode, final Bundle options) {
+        executeWithRouter(new RouterRequiringFunc() {
+            @Override public void execute() { mRouter.getLifecycleHandler().startActivityForResult(mInstanceId, intent, requestCode, options); }
+        });
+    }
+
+    /**
+     * Registers this Controller to handle onActivityResult responses. Calling this method is NOT
+     * necessary when calling {@link #startActivityForResult(Intent, int)}
+     *
+     * @param requestCode The request code being registered for.
+     */
+    public final void registerForActivityResult(final int requestCode) {
+        executeWithRouter(new RouterRequiringFunc() {
+            @Override public void execute() { mRouter.getLifecycleHandler().registerForActivityRequest(mInstanceId, requestCode); }
+        });
     }
 
     /**
@@ -411,8 +443,8 @@ public abstract class Controller {
      * the result.
      *
      * @param requestCode The requestCode passed to startActivityForResult
-     * @param resultCode The resultCode that was returned to the host Activity's onActivityResult method
-     * @param data The data Intent that was returned to the host Activity's onActivityResult method
+     * @param resultCode  The resultCode that was returned to the host Activity's onActivityResult method
+     * @param data        The data Intent that was returned to the host Activity's onActivityResult method
      */
     public void onActivityResult(int requestCode, int resultCode, Intent data) { }
 
@@ -422,9 +454,12 @@ public abstract class Controller {
      * {@link #onRequestPermissionsResult(int, String[], int[])} will be forwarded back to this Controller by the system.
      */
     @TargetApi(Build.VERSION_CODES.M)
-    public final void requestPermissions(@NonNull String[] permissions, int requestCode) {
+    public final void requestPermissions(@NonNull final String[] permissions, final int requestCode) {
         mRequestedPermissions.addAll(Arrays.asList(permissions));
-        getRouter().getLifecycleHandler().requestPermissions(mInstanceId, permissions, requestCode);
+
+        executeWithRouter(new RouterRequiringFunc() {
+            @Override public void execute() { mRouter.getLifecycleHandler().requestPermissions(mInstanceId, permissions, requestCode); }
+        });
     }
 
     /**
@@ -440,8 +475,8 @@ public abstract class Controller {
     /**
      * Should be overridden if this Controller has requested runtime permissions and needs to handle the user's response.
      *
-     * @param requestCode The requestCode that was used to request the permissions
-     * @param permissions The array of permissions requested
+     * @param requestCode  The requestCode that was used to request the permissions
+     * @param permissions  The array of permissions requested
      * @param grantResults The results for each permission requested
      */
     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { }
@@ -533,6 +568,66 @@ public abstract class Controller {
         mOverriddenPopHandler = overriddenPopHandler;
     }
 
+    /**
+     * Registers/unregisters for participation in populating the options menu by receiving options-related
+     * callbacks, such as {@link #onCreateOptionsMenu(Menu, MenuInflater)}
+     *
+     * @param hasOptionsMenu If true, this controller's options menu callbacks will be called.
+     */
+    public final void setHasOptionsMenu(boolean hasOptionsMenu) {
+        boolean invalidate = mAttached && !mOptionsMenuHidden && mHasOptionsMenu != hasOptionsMenu;
+
+        mHasOptionsMenu = hasOptionsMenu;
+
+        if (invalidate) {
+            mRouter.invalidateOptionsMenu();
+        }
+    }
+
+    /**
+     * Sets whether or not this controller's menu items should be visible. This is useful for hiding the
+     * controller's options menu items when its UI is hidden, and not just when it is detached from the
+     * window (the default).
+     *
+     * @param optionsMenuHidden Defaults to false. If true, this controller's menu items will not be shown.
+     */
+    public final void setOptionsMenuHidden(boolean optionsMenuHidden) {
+        boolean invalidate = mAttached && mHasOptionsMenu && mOptionsMenuHidden != optionsMenuHidden;
+
+        mOptionsMenuHidden = optionsMenuHidden;
+
+        if (invalidate) {
+            mRouter.invalidateOptionsMenu();
+        }
+    }
+
+    /**
+     * Adds option items to the host Activity's standard options menu. This will only be called if
+     * {@link #setHasOptionsMenu(boolean)} has been called.
+     *
+     * @param menu The menu into which your options should be placed.
+     * @param inflater The inflater that can be used to inflate your menu items.
+     */
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { }
+
+    /**
+     * Prepare the screen's options menu to be displayed. This is called directly before showing the
+     * menu and can be used modify its contents.
+     *
+     * @param menu The menu that will be displayed
+     */
+    public void onPrepareOptionsMenu(Menu menu) { }
+
+    /**
+     * Called when an option menu item has been selected by the user.
+     *
+     * @param item The selected item.
+     * @return True if this event has been consumed, false if it has not.
+     */
+    public boolean onOptionsItemSelected(MenuItem item) {
+        return false;
+    }
+
     final void prepareForActivityPause() {
         mNeedsAttach = mNeedsAttach || mAttached;
     }
@@ -553,11 +648,24 @@ public abstract class Controller {
     final void setRouter(@NonNull Router router) {
         mRouter = router;
 
+        for (RouterRequiringFunc listener : mOnRouterSetListeners) {
+            listener.execute();
+        }
+        mOnRouterSetListeners.clear();
+
         for (ChildControllerTransaction child : mChildControllers) {
             child.controller.setRouter(router);
         }
     }
 
+    final void executeWithRouter(@NonNull RouterRequiringFunc listener) {
+        if (mRouter != null) {
+            listener.execute();
+        } else {
+            mOnRouterSetListeners.add(listener);
+        }
+    }
+
     private void addChildController(ChildControllerTransaction transaction, ControllerChangeHandler pushChangeHandler) {
         if (transaction.controller.mParentController == null) {
             transaction.controller.setRouter(mRouter);
@@ -644,6 +752,10 @@ public abstract class Controller {
 
         onAttach(view);
 
+        if (mHasOptionsMenu && !mOptionsMenuHidden) {
+            mRouter.invalidateOptionsMenu();
+        }
+
         for (LifecycleListener lifecycleListener : mLifecycleListeners) {
             lifecycleListener.postAttach(this, view);
         }
@@ -660,6 +772,10 @@ public abstract class Controller {
             mAttached = false;
             onDetach(view);
 
+            if (mHasOptionsMenu && !mOptionsMenuHidden) {
+                mRouter.invalidateOptionsMenu();
+            }
+
             for (ChildControllerTransaction child : mChildControllers) {
                 ViewGroup container = (ViewGroup)mView.findViewById(child.containerId);
                 if (container != null) {
@@ -745,6 +861,10 @@ public abstract class Controller {
 
             mDestroyed = true;
 
+            if (mRouter != null) {
+                mRouter.getLifecycleHandler().unregisterForActivityRequests(mInstanceId);
+            }
+
             onDestroy();
 
             for (LifecycleListener lifecycleListener : mLifecycleListeners) {
@@ -879,6 +999,25 @@ public abstract class Controller {
         }
     }
 
+    final void createOptionsMenu(Menu menu, MenuInflater inflater) {
+        if (mAttached && mHasOptionsMenu && !mOptionsMenuHidden) {
+            onCreateOptionsMenu(menu, inflater);
+        }
+    }
+
+    final void prepareOptionsMenu(Menu menu) {
+        if (mAttached && mHasOptionsMenu && !mOptionsMenuHidden) {
+            onPrepareOptionsMenu(menu);
+        }
+    }
+
+    final boolean optionsItemSelected(MenuItem item) {
+        if (mAttached && mHasOptionsMenu && !mOptionsMenuHidden) {
+            return onOptionsItemSelected(item);
+        }
+        return false;
+    }
+
     private void ensureRequiredConstructor() {
         Constructor[] constructors = getClass().getConstructors();
         if (getBundleConstructor(constructors) == null && getDefaultConstructor(constructors) == null) {

conductor/src/main/java/com/bluelinelabs/conductor/ControllerChangeHandler.java

@@ -2,7 +2,6 @@ package com.bluelinelabs.conductor;
 
 import android.os.Bundle;
 import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -71,7 +70,7 @@ public abstract class ControllerChangeHandler {
         }
     }
 
-    public static ControllerChangeHandler fromBundle(@Nullable Bundle bundle) {
+    public static ControllerChangeHandler fromBundle(Bundle bundle) {
         if (bundle != null) {
             String className = bundle.getString(KEY_CLASS_NAME);
             ControllerChangeHandler changeHandler = ClassUtils.newInstance(className);

conductor/src/main/java/com/bluelinelabs/conductor/ControllerTransaction.java

@@ -13,16 +13,24 @@ public class ControllerTransaction {
      */
     public enum ControllerChangeType {
         /** The Controller is being pushed to the host container */
-        PUSH_ENTER,
+        PUSH_ENTER(true, true),
 
         /** The Controller is being pushed to the backstack as another Controller is pushed to the host container */
-        PUSH_EXIT,
+        PUSH_EXIT(true, false),
 
         /** The Controller is being popped from the backstack and placed in the host container as another Controller is popped */
-        POP_ENTER,
+        POP_ENTER(false, true),
 
-        /** The Controller is being popped from the host contianer */
-        POP_EXIT
+        /** The Controller is being popped from the host container */
+        POP_EXIT(false, false);
+
+        public boolean isPush;
+        public boolean isEnter;
+
+        ControllerChangeType(boolean isPush, boolean isEnter) {
+            this.isPush = isPush;
+            this.isEnter = isEnter;
+        }
     }
 
     private static final String KEY_VIEW_CONTROLLER_BUNDLE = "ControllerTransaction.controller.bundle";

conductor/src/main/java/com/bluelinelabs/conductor/Router.java

@@ -4,6 +4,9 @@ import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -38,19 +41,15 @@ public class Router {
     }
 
     /**
-     * This should be called by the host Activity when its onActivityResult method is called. The call will be forwarded
-     * to the {@link Controller} with the instanceId passed in.
+     * This should be called by the host Activity when its onActivityResult method is called if the instanceId
+     * of the controller that called startActivityForResult is not known.
      *
-     * @param instanceId The instanceId of the Controller to which this result should be forwarded
      * @param requestCode The Activity's onActivityResult requestCode
      * @param resultCode The Activity's onActivityResult resultCode
      * @param data The Activity's onActivityResult data
      */
-    public void onActivityResult(String instanceId, int requestCode, int resultCode, Intent data) {
-        Controller controller = getControllerWithInstanceId(instanceId);
-        if (controller != null) {
-            controller.onActivityResult(requestCode, resultCode, data);
-        }
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        getLifecycleHandler().onActivityResult(requestCode, resultCode, data);
     }
 
     /**
@@ -347,6 +346,13 @@ public class Router {
         }
     }
 
+    public final void onActivityResult(String instanceId, int requestCode, int resultCode, Intent data) {
+        Controller controller = getControllerWithInstanceId(instanceId);
+        if (controller != null) {
+            controller.onActivityResult(requestCode, resultCode, data);
+        }
+    }
+
     public final void onActivityStarted(Activity activity) {
         for (RouterTransaction transaction : mBackStack) {
             transaction.controller.activityStarted(activity);
@@ -399,6 +405,33 @@ public class Router {
         mBackStack.restoreInstanceState(savedInstanceState);
     }
 
+    public final void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        for (RouterTransaction transaction : mBackStack) {
+            transaction.controller.createOptionsMenu(menu, inflater);
+        }
+    }
+
+    public final void onPrepareOptionsMenu(Menu menu) {
+        for (RouterTransaction transaction : mBackStack) {
+            transaction.controller.prepareOptionsMenu(menu);
+        }
+    }
+
+    public final boolean onOptionsItemSelected(MenuItem item) {
+        for (RouterTransaction transaction : mBackStack) {
+            if (transaction.controller.optionsItemSelected(item)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    final void invalidateOptionsMenu() {
+        if (mLifecycleHandler != null) {
+            mLifecycleHandler.getFragmentManager().invalidateOptionsMenu();
+        }
+    }
+
     private void popToTransaction(@NonNull RouterTransaction transaction, ControllerChangeHandler changeHandler) {
         RouterTransaction topTransaction = mBackStack.peek();
         List<RouterTransaction> poppedTransactions = mBackStack.popTo(transaction);

conductor/src/main/java/com/bluelinelabs/conductor/internal/LifecycleHandler.java

@@ -9,6 +9,9 @@ import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.util.SparseArray;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
 import android.view.ViewGroup;
 
 import com.bluelinelabs.conductor.Router;
@@ -33,6 +36,7 @@ public class LifecycleHandler extends Fragment implements ActivityLifecycleCallb
 
     public LifecycleHandler() {
         setRetainInstance(true);
+        setHasOptionsMenu(true);
     }
 
     private static LifecycleHandler findInActivity(Activity activity) {
@@ -155,13 +159,54 @@ public class LifecycleHandler extends Fragment implements ActivityLifecycleCallb
         return super.shouldShowRequestPermissionRationale(permission);
     }
 
-    public void startActivityForResult(String instanceId, Intent intent, int requestCode) {
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        super.onCreateOptionsMenu(menu, inflater);
+
+        for (Router router : mRouterMap.values()) {
+            router.onCreateOptionsMenu(menu, inflater);
+        }
+    }
+
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+
+        for (Router router : mRouterMap.values()) {
+            router.onPrepareOptionsMenu(menu);
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        for (Router router : mRouterMap.values()) {
+            if (router.onOptionsItemSelected(item)) {
+                return true;
+            }
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    public void registerForActivityRequest(String instanceId, int requestCode) {
         mActivityRequestMap.put(requestCode, instanceId);
+    }
+
+    public void unregisterForActivityRequests(String instanceId) {
+        for (int i = mActivityRequestMap.size() - 1; i >= 0; i--) {
+            if (instanceId.equals(mActivityRequestMap.get(mActivityRequestMap.keyAt(i)))) {
+                mActivityRequestMap.removeAt(i);
+            }
+        }
+    }
+
+    public void startActivityForResult(String instanceId, Intent intent, int requestCode) {
+        registerForActivityRequest(instanceId, requestCode);
         startActivityForResult(intent, requestCode);
     }
 
     public void startActivityForResult(String instanceId, Intent intent, int requestCode, Bundle options) {
-        mActivityRequestMap.put(requestCode, instanceId);
+        registerForActivityRequest(instanceId, requestCode);
         startActivityForResult(intent, requestCode, options);
     }
 

conductor/src/main/java/com/bluelinelabs/conductor/internal/RouterRequiringFunc.java

@@ -0,0 +1,5 @@
+package com.bluelinelabs.conductor.internal;
+
+public interface RouterRequiringFunc {
+    void execute();
+}

demo/src/main/java/com/bluelinelabs/conductor/demo/ActionBarProvider.java

@@ -0,0 +1,7 @@
+package com.bluelinelabs.conductor.demo;
+
+import android.support.v7.app.ActionBar;
+
+public interface ActionBarProvider {
+    ActionBar getSupportActionBar();
+}

demo/src/main/java/com/bluelinelabs/conductor/demo/MainActivity.java

@@ -1,7 +1,8 @@
 package com.bluelinelabs.conductor.demo;
 
-import android.app.Activity;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
 import android.view.ViewGroup;
 
 import com.bluelinelabs.conductor.Conductor;
@@ -11,8 +12,9 @@ import com.bluelinelabs.conductor.demo.controllers.HomeController;
 import butterknife.Bind;
 import butterknife.ButterKnife;
 
-public class MainActivity extends Activity {
+public class MainActivity extends AppCompatActivity implements ActionBarProvider {
 
+    @Bind(R.id.toolbar) Toolbar mToolbar;
     @Bind(R.id.controller_container) ViewGroup mContainer;
 
     private Router mRouter;
@@ -24,6 +26,8 @@ public class MainActivity extends Activity {
         setContentView(R.layout.activity_main);
         ButterKnife.bind(this);
 
+        setSupportActionBar(mToolbar);
+
         mRouter = Conductor.attachRouter(this, mContainer, savedInstanceState);
         if (!mRouter.hasRootController()) {
             mRouter.setRoot(new HomeController());

demo/src/main/java/com/bluelinelabs/conductor/demo/changehandler/CircularRevealChangeHandler.java

@@ -1,4 +1,4 @@
-package com.bluelinelabs.conductor.changehandler;
+package com.bluelinelabs.conductor.demo.changehandler;
 
 import android.animation.Animator;
 import android.annotation.TargetApi;
@@ -9,6 +9,8 @@ import android.view.View;
 import android.view.ViewAnimationUtils;
 import android.view.ViewGroup;
 
+import com.bluelinelabs.conductor.changehandler.AnimatorChangeHandler;
+
 /**
  * An {@link AnimatorChangeHandler} that will perform a circular reveal
  */

demo/src/main/java/com/bluelinelabs/conductor/demo/changehandler/CircularRevealChangeHandlerCompat.java

@@ -0,0 +1,36 @@
+package com.bluelinelabs.conductor.demo.changehandler;
+
+import android.animation.Animator;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.view.View;
+import android.view.ViewGroup;
+
+public class CircularRevealChangeHandlerCompat extends CircularRevealChangeHandler {
+
+    public CircularRevealChangeHandlerCompat() { }
+
+    public CircularRevealChangeHandlerCompat(@NonNull View fromView, @NonNull View containerView) {
+        super(fromView, containerView);
+    }
+
+    @Override
+    protected Animator getAnimator(@NonNull ViewGroup container, View from, View to, boolean isPush, boolean toAddedToContainer) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            return super.getAnimator(container, from, to, isPush, toAddedToContainer);
+        } else {
+            AnimatorSet animator = new AnimatorSet();
+            if (to != null && toAddedToContainer) {
+                animator.play(ObjectAnimator.ofFloat(to, View.ALPHA, 0, 1));
+            }
+
+            if (from != null) {
+                animator.play(ObjectAnimator.ofFloat(from, View.ALPHA, 0));
+            }
+
+            return animator;
+        }
+    }
+}

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/ChildController.java

@@ -10,11 +10,11 @@ import android.widget.TextView;
 
 import com.bluelinelabs.conductor.demo.util.BundleBuilder;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 
 import butterknife.Bind;
 
-public class ChildController extends RefWatchingController {
+public class ChildController extends BaseController {
 
     private static final String KEY_TITLE = "ChildController.title";
     private static final String KEY_BG_COLOR = "ChildController.bgColor";

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/DragDismissController.java

@@ -10,14 +10,14 @@ import android.widget.TextView;
 
 import com.bluelinelabs.conductor.demo.R;
 import com.bluelinelabs.conductor.demo.changehandler.ScaleFadeChangeHandler;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 import com.bluelinelabs.conductor.demo.widget.ElasticDragDismissFrameLayout;
 import com.bluelinelabs.conductor.demo.widget.ElasticDragDismissFrameLayout.ElasticDragDismissCallback;
 
 import butterknife.Bind;
 
 @TargetApi(VERSION_CODES.LOLLIPOP)
-public class DragDismissController extends RefWatchingController {
+public class DragDismissController extends BaseController {
 
     @Bind(R.id.tv_lorem_ipsum) TextView mTvLoremIpsum;
 
@@ -52,4 +52,8 @@ public class DragDismissController extends RefWatchingController {
         ((ElasticDragDismissFrameLayout)view).removeListener(mDragDismissListener);
     }
 
+    @Override
+    protected String getTitle() {
+        return "Drag to Dismiss";
+    }
 }

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/HomeController.java

@@ -1,28 +1,40 @@
 package com.bluelinelabs.conductor.demo.controllers;
 
+import android.content.Intent;
 import android.graphics.PorterDuff.Mode;
+import android.net.Uri;
 import android.support.annotation.ColorRes;
 import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
+import android.text.SpannableString;
+import android.text.SpannableStringBuilder;
+import android.text.Spanned;
+import android.text.style.AbsoluteSizeSpan;
+import android.text.style.URLSpan;
 import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
 
 import com.bluelinelabs.conductor.ChildControllerTransaction;
+import com.bluelinelabs.conductor.ControllerChangeHandler;
+import com.bluelinelabs.conductor.ControllerTransaction.ControllerChangeType;
 import com.bluelinelabs.conductor.RouterTransaction;
 import com.bluelinelabs.conductor.changehandler.FadeChangeHandler;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import butterknife.OnClick;
 
-public class HomeController extends RefWatchingController {
+public class HomeController extends BaseController {
 
     public enum HomeDemoModel {
         NAVIGATION("Navigation Demos", R.color.red_300),
@@ -45,6 +57,10 @@ public class HomeController extends RefWatchingController {
 
     @Bind(R.id.recycler_view) RecyclerView mRecyclerView;
 
+    public HomeController() {
+        setHasOptionsMenu(true);
+    }
+
     @NonNull
     @Override
     protected View inflateView(@NonNull LayoutInflater inflater, @NonNull ViewGroup container) {
@@ -60,6 +76,58 @@ public class HomeController extends RefWatchingController {
         mRecyclerView.setAdapter(new HomeAdapter(LayoutInflater.from(view.getContext()), HomeDemoModel.values()));
     }
 
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        super.onCreateOptionsMenu(menu, inflater);
+       inflater.inflate(R.menu.home, menu);
+    }
+
+    @Override
+    protected void onChangeStarted(@NonNull ControllerChangeHandler changeHandler, @NonNull ControllerChangeType changeType) {
+        setOptionsMenuHidden(!changeType.isEnter);
+
+        if (changeType.isEnter) {
+            setTitle();
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == R.id.about) {
+            SpannableString details = new SpannableString("A small, yet full-featured framework that allows building View-based Android applications");
+            details.setSpan(new AbsoluteSizeSpan(16, true), 0, details.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+
+            final String url = "https://github.com/bluelinelabs/Conductor";
+            SpannableString link = new SpannableString(url);
+            link.setSpan(new URLSpan(url) {
+                @Override
+                public void onClick(View widget) {
+                    startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
+                }
+            }, 0, link.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+
+            SpannableStringBuilder content = new SpannableStringBuilder();
+            content.append("Conductor");
+            content.append("\n\n");
+            content.append(details);
+            content.append("\n\n");
+            content.append(link);
+
+            addChildController(ChildControllerTransaction.builder(new OverlayController(content), R.id.home_root)
+                    .pushChangeHandler(new FadeChangeHandler())
+                    .popChangeHandler(new FadeChangeHandler())
+                    .addToLocalBackstack(true)
+                    .build());
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    protected String getTitle() {
+        return "Conductor Demos";
+    }
+
     void onModelRowClick(HomeDemoModel model) {
         switch (model) {
             case NAVIGATION:
@@ -91,7 +159,7 @@ public class HomeController extends RefWatchingController {
                         .build());
                 break;
             case OVERLAY:
-                addChildController(ChildControllerTransaction.builder(new OverlayController(), R.id.home_root)
+                addChildController(ChildControllerTransaction.builder(new OverlayController("I'm an Overlay!"), R.id.home_root)
                         .pushChangeHandler(new FadeChangeHandler())
                         .popChangeHandler(new FadeChangeHandler())
                         .addToLocalBackstack(true)

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/NavigationDemoController.java

@@ -9,15 +9,15 @@ import android.widget.TextView;
 
 import com.bluelinelabs.conductor.RouterTransaction;
 import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
-import com.bluelinelabs.conductor.demo.util.BundleBuilder;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
+import com.bluelinelabs.conductor.demo.util.BundleBuilder;
 import com.bluelinelabs.conductor.demo.util.ColorUtil;
 
 import butterknife.Bind;
 import butterknife.OnClick;
 
-public class NavigationDemoController extends RefWatchingController {
+public class NavigationDemoController extends BaseController {
 
     public static final String TAG_UP_TRANSACTION = "NavigationDemoController.up";
 
@@ -52,6 +52,11 @@ public class NavigationDemoController extends RefWatchingController {
         mTvTitle.setText(getResources().getString(R.string.navigation_title, mIndex));
     }
 
+    @Override
+    protected String getTitle() {
+        return "Navigation Demos";
+    }
+
     @OnClick(R.id.btn_next) void onNextClicked() {
         getRouter().pushController(RouterTransaction.builder(new NavigationDemoController(mIndex + 1))
                 .pushChangeHandler(new HorizontalChangeHandler())

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/OverlayController.java

@@ -1,20 +1,35 @@
 package com.bluelinelabs.conductor.demo.controllers;
 
+import android.os.Bundle;
 import android.support.annotation.NonNull;
+import android.text.method.LinkMovementMethod;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
+import com.bluelinelabs.conductor.demo.util.BundleBuilder;
 
 import butterknife.Bind;
 
-public class OverlayController extends RefWatchingController {
+public class OverlayController extends BaseController {
+
+    private static final String KEY_TEXT = "OverlayController.text";
 
     @Bind(R.id.text_view) TextView mTextView;
 
+    public OverlayController(CharSequence text) {
+        this(new BundleBuilder(new Bundle())
+                .putCharSequence(KEY_TEXT, text)
+                .build());
+    }
+
+    public OverlayController(Bundle args) {
+        super(args);
+    }
+
     @NonNull
     @Override
     protected View inflateView(@NonNull LayoutInflater inflater, @NonNull ViewGroup container) {
@@ -24,7 +39,8 @@ public class OverlayController extends RefWatchingController {
     @Override
     public void onViewBound(@NonNull View view) {
         super.onViewBound(view);
-        mTextView.setText("I'm an Overlay");
+        mTextView.setText(getArgs().getCharSequence(KEY_TEXT));
+        mTextView.setMovementMethod(LinkMovementMethod.getInstance());
     }
 
 }

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/PagerController.java

@@ -1,6 +1,10 @@
 package com.bluelinelabs.conductor.demo.controllers;
 
 import android.support.annotation.NonNull;
+import android.support.design.widget.TabLayout;
+import android.support.design.widget.TabLayout.OnTabSelectedListener;
+import android.support.design.widget.TabLayout.Tab;
+import android.support.design.widget.TabLayout.TabLayoutOnPageChangeListener;
 import android.support.v4.view.ViewPager;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -8,35 +12,35 @@ import android.view.ViewGroup;
 
 import com.bluelinelabs.conductor.Controller;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 import com.bluelinelabs.conductor.support.ControllerPagerAdapter;
 
 import butterknife.Bind;
 
-public class PagerController extends RefWatchingController {
+public class PagerController extends BaseController {
 
+    private int[] PAGE_COLORS = new int[]{R.color.green_300, R.color.cyan_300, R.color.deep_purple_300, R.color.lime_300, R.color.red_300};
+
+    @Bind(R.id.tab_layout) TabLayout mTabLayout;
     @Bind(R.id.view_pager) ViewPager mViewPager;
+
     private ControllerPagerAdapter mPagerAdapter;
 
     public PagerController() {
         mPagerAdapter = new ControllerPagerAdapter(this) {
             @Override
             public Controller getItem(int position) {
-                switch (position) {
-                    case 0:
-                        return new ChildController("Child #1 (Swipe to see more)", R.color.cyan_300, true);
-                    case 1:
-                        return new ChildController("Child #2 (Swipe to see more)", R.color.deep_purple_300, true);
-                    case 2:
-                        return new ChildController("Child #3 (Swipe to see more)", R.color.lime_300, true);
-                    default:
-                        throw new RuntimeException("Invalid item position: " + position);
-                }
+                return new ChildController(String.format("Child #%d (Swipe to see more)", position), PAGE_COLORS[position], true);
             }
 
             @Override
             public int getCount() {
-                return 3;
+                return PAGE_COLORS.length;
+            }
+
+            @Override
+            public CharSequence getPageTitle(int position) {
+                return "Page " + position;
             }
         };
     }
@@ -44,7 +48,22 @@ public class PagerController extends RefWatchingController {
     @Override
     protected void onViewBound(@NonNull View view) {
         super.onViewBound(view);
+        mTabLayout.setTabsFromPagerAdapter(mPagerAdapter);
         mViewPager.setAdapter(mPagerAdapter);
+
+        mViewPager.addOnPageChangeListener(new TabLayoutOnPageChangeListener(mTabLayout));
+        mTabLayout.setOnTabSelectedListener(new OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(Tab tab) {
+                mViewPager.setCurrentItem(tab.getPosition());
+            }
+
+            @Override
+            public void onTabUnselected(Tab tab) { }
+
+            @Override
+            public void onTabReselected(Tab tab) { }
+        });
     }
 
     @NonNull
@@ -53,4 +72,9 @@ public class PagerController extends RefWatchingController {
         return inflater.inflate(R.layout.controller_pager, container, false);
     }
 
+    @Override
+    protected String getTitle() {
+        return "ViewPager Demo";
+    }
+
 }

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/ParentController.java

@@ -11,10 +11,10 @@ import com.bluelinelabs.conductor.ControllerChangeHandler;
 import com.bluelinelabs.conductor.ControllerTransaction.ControllerChangeType;
 import com.bluelinelabs.conductor.changehandler.FadeChangeHandler;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 import com.bluelinelabs.conductor.demo.util.ColorUtil;
 
-public class ParentController extends RefWatchingController {
+public class ParentController extends BaseController {
 
     private static final int NUMBER_OF_CHILDREN = 5;
     private boolean mFinishing;
@@ -62,6 +62,11 @@ public class ParentController extends RefWatchingController {
         return true;
     }
 
+    @Override
+    protected String getTitle() {
+        return "Parent/Child Demo";
+    }
+
     @Override
     public void addChildController(ChildControllerTransaction transaction) {
         final int index = Integer.parseInt(transaction.tag);

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/RxLifecycleController.java

@@ -10,7 +10,7 @@ import android.widget.TextView;
 import com.bluelinelabs.conductor.RouterTransaction;
 import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 import com.bluelinelabs.conductor.rxlifecycle.ControllerEvent;
 
 import java.util.concurrent.TimeUnit;
@@ -23,7 +23,7 @@ import rx.functions.Action1;
 
 // Shamelessly borrowed from the official RxLifecycle demo by Trello and adapted for Conductor Controllers
 // instead of Activities or Fragments.
-public class RxLifecycleController extends RefWatchingController {
+public class RxLifecycleController extends BaseController {
 
     private static final String TAG = "RxLifecycleController";
 
@@ -112,6 +112,11 @@ public class RxLifecycleController extends RefWatchingController {
         Log.i(TAG, "onDestroy() called");
     }
 
+    @Override
+    protected String getTitle() {
+        return "RxLifecycle Demo";
+    }
+
     @NonNull
     @Override
     protected View inflateView(@NonNull LayoutInflater inflater, @NonNull ViewGroup container) {

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/TargetDisplayController.java

@@ -17,12 +17,12 @@ import com.bluelinelabs.conductor.RouterTransaction;
 import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
 import com.bluelinelabs.conductor.demo.R;
 import com.bluelinelabs.conductor.demo.controllers.TargetTitleEntryController.TargetTitleEntryControllerListener;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 
 import butterknife.Bind;
 import butterknife.OnClick;
 
-public class TargetDisplayController extends RefWatchingController implements TargetTitleEntryControllerListener {
+public class TargetDisplayController extends BaseController implements TargetTitleEntryControllerListener {
 
     private static final int REQUEST_SELECT_IMAGE = 126;
 
@@ -94,6 +94,11 @@ public class TargetDisplayController extends RefWatchingController implements Ta
         }
     }
 
+    @Override
+    protected String getTitle() {
+        return "Target Controller Demo";
+    }
+
     private void setImageView() {
         mImageView.setImageURI(mImageUri);
     }

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/TargetTitleEntryController.java

@@ -8,12 +8,12 @@ import android.widget.EditText;
 
 import com.bluelinelabs.conductor.Controller;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 
 import butterknife.Bind;
 import butterknife.OnClick;
 
-public class TargetTitleEntryController extends RefWatchingController {
+public class TargetTitleEntryController extends BaseController {
 
     public interface TargetTitleEntryControllerListener {
         void onTitlePicked(String option);
@@ -22,22 +22,22 @@ public class TargetTitleEntryController extends RefWatchingController {
     @Bind(R.id.edit_text) EditText mEditText;
 
     public <T extends Controller & TargetTitleEntryControllerListener> TargetTitleEntryController(T targetController) {
-        super.setTargetController(targetController);
+        setTargetController(targetController);
     }
 
     public TargetTitleEntryController() { }
 
-    @Override
-    public void setTargetController(Controller target) {
-        throw new RuntimeException(getClass().getSimpleName() + "s can only have their target set through the constructor.");
-    }
-
     @NonNull
     @Override
     protected View inflateView(@NonNull LayoutInflater inflater, @NonNull ViewGroup container) {
         return inflater.inflate(R.layout.controller_target_title_entry, container, false);
     }
 
+    @Override
+    protected String getTitle() {
+        return "Target Controller Demo";
+    }
+
     @OnClick(R.id.btn_use_title) void optionPicked() {
         Controller targetController = getTargetController();
         if (targetController != null) {

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/TextController.java

@@ -9,11 +9,11 @@ import android.widget.TextView;
 
 import com.bluelinelabs.conductor.demo.util.BundleBuilder;
 import com.bluelinelabs.conductor.demo.R;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
 
 import butterknife.Bind;
 
-public class TextController extends RefWatchingController {
+public class TextController extends BaseController {
 
     private static final String KEY_TEXT = "TextController.text";
 

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/TransitionDemoController.java

@@ -15,27 +15,27 @@ import android.widget.TextView;
 import com.bluelinelabs.conductor.Controller;
 import com.bluelinelabs.conductor.ControllerChangeHandler;
 import com.bluelinelabs.conductor.RouterTransaction;
-import com.bluelinelabs.conductor.changehandler.CircularRevealChangeHandler;
 import com.bluelinelabs.conductor.changehandler.FadeChangeHandler;
 import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
 import com.bluelinelabs.conductor.changehandler.VerticalChangeHandler;
-import com.bluelinelabs.conductor.demo.util.BundleBuilder;
 import com.bluelinelabs.conductor.demo.R;
 import com.bluelinelabs.conductor.demo.changehandler.ArcFadeMoveChangeHandlerCompat;
+import com.bluelinelabs.conductor.demo.changehandler.CircularRevealChangeHandlerCompat;
 import com.bluelinelabs.conductor.demo.changehandler.FlipChangeHandler;
-import com.bluelinelabs.conductor.demo.controllers.base.RefWatchingController;
+import com.bluelinelabs.conductor.demo.controllers.base.BaseController;
+import com.bluelinelabs.conductor.demo.util.BundleBuilder;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import butterknife.OnClick;
 
-public class TransitionDemoController extends RefWatchingController {
+public class TransitionDemoController extends BaseController {
 
     private static final String KEY_INDEX = "TransitionDemoController.index";
 
     public enum TransitionDemo {
         VERTICAL("Vertical Slide Animation", R.layout.controller_transition_demo, R.color.blue_grey_300),
-        CIRCULAR("Circular Reveal Animation", R.layout.controller_transition_demo, R.color.red_300),
+        CIRCULAR("Circular Reveal Animation (on Lollipop and above, else Fade)", R.layout.controller_transition_demo, R.color.red_300),
         FADE("Fade Animation", R.layout.controller_transition_demo, R.color.blue_300),
         FLIP("Flip Animation", R.layout.controller_transition_demo, R.color.deep_orange_300),
         HORIZONTAL("Horizontal Slide Animation", R.layout.controller_transition_demo, R.color.green_300),
@@ -101,6 +101,11 @@ public class TransitionDemoController extends RefWatchingController {
         mTvTitle.setText(mTransitionDemo.title);
     }
 
+    @Override
+    protected String getTitle() {
+        return "Transition Demos";
+    }
+
     @OnClick(R.id.btn_next) void onNextClicked() {
         final int nextIndex = mTransitionDemo.ordinal() + 1;
 
@@ -117,7 +122,7 @@ public class TransitionDemoController extends RefWatchingController {
                 return new VerticalChangeHandler();
             case CIRCULAR:
                 TransitionDemoController demoController = (TransitionDemoController)from;
-                return new CircularRevealChangeHandler(demoController.mBtnNext, demoController.mContainerView);
+                return new CircularRevealChangeHandlerCompat(demoController.mBtnNext, demoController.mContainerView);
             case FADE:
                 return new FadeChangeHandler();
             case FLIP:

demo/src/main/java/com/bluelinelabs/conductor/demo/controllers/base/BaseController.java

@@ -0,0 +1,42 @@
+package com.bluelinelabs.conductor.demo.controllers.base;
+
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v7.app.ActionBar;
+import android.view.View;
+
+import com.bluelinelabs.conductor.demo.ActionBarProvider;
+
+public abstract class BaseController extends RefWatchingController {
+
+    protected BaseController() { }
+
+    protected BaseController(Bundle args) {
+        super(args);
+    }
+
+    // Note: This is just a quick demo of how an ActionBar *can* be accessed, not necessarily how it *should*
+    // be accessed. In a production app, this would use Dagger instead.
+    protected ActionBar getActionBar() {
+        ActionBarProvider actionBarProvider = ((ActionBarProvider)getActivity());
+        return actionBarProvider != null ? actionBarProvider.getSupportActionBar() : null;
+    }
+
+    @Override
+    protected void onAttach(@NonNull View view) {
+        setTitle();
+        super.onAttach(view);
+    }
+
+    protected void setTitle() {
+        String title = getTitle();
+        ActionBar actionBar = getActionBar();
+        if (title != null && actionBar != null) {
+            actionBar.setTitle(title);
+        }
+    }
+
+    protected String getTitle() {
+        return null;
+    }
+}

demo/src/main/java/com/bluelinelabs/conductor/demo/widget/ElasticDragDismissFrameLayout.java

@@ -16,13 +16,12 @@
 
 package com.bluelinelabs.conductor.demo.widget;
 
-import android.annotation.TargetApi;
 import android.content.Context;
-import android.os.Build.VERSION_CODES;
+import android.support.v4.view.NestedScrollingParent;
+import android.support.v4.view.animation.FastOutSlowInInterpolator;
 import android.util.AttributeSet;
 import android.util.TypedValue;
 import android.view.View;
-import android.view.animation.AnimationUtils;
 import android.widget.FrameLayout;
 
 import java.util.ArrayList;
@@ -33,8 +32,30 @@ import java.util.List;
  * Applies an elasticity factor to reduce movement as you approach the given dismiss distance.
  * Optionally also scales down content during drag.
  */
-@TargetApi(VERSION_CODES.LOLLIPOP)
-public class ElasticDragDismissFrameLayout extends FrameLayout {
+public class ElasticDragDismissFrameLayout extends FrameLayout implements NestedScrollingParent {
+
+    public static abstract class ElasticDragDismissCallback {
+
+        /**
+         * Called for each drag event.
+         *
+         * @param elasticOffset       Indicating the drag offset with elasticity applied i.e. may
+         *                            exceed 1.
+         * @param elasticOffsetPixels The elastically scaled drag distance in pixels.
+         * @param rawOffset           Value from [0, 1] indicating the raw drag offset i.e.
+         *                            without elasticity applied. A value of 1 indicates that the
+         *                            dismiss distance has been reached.
+         * @param rawOffsetPixels     The raw distance the user has dragged
+         */
+        public void onDrag(float elasticOffset, float elasticOffsetPixels,
+                           float rawOffset, float rawOffsetPixels) { }
+
+        /**
+         * Called when dragging is released and has exceeded the threshold dismiss distance.
+         */
+        public void onDragDismissed() { }
+
+    }
 
     // configurable attribs
     private float dragDismissDistance = Float.MAX_VALUE;
@@ -51,21 +72,16 @@ public class ElasticDragDismissFrameLayout extends FrameLayout {
     private List<ElasticDragDismissCallback> callbacks;
 
     public ElasticDragDismissFrameLayout(Context context) {
-        this(context, null, 0, 0);
+        this(context, null, 0);
     }
 
     public ElasticDragDismissFrameLayout(Context context, AttributeSet attrs) {
-        this(context, attrs, 0, 0);
+        this(context, attrs, 0);
     }
 
     public ElasticDragDismissFrameLayout(Context context, AttributeSet attrs,
                                          int defStyleAttr) {
-        this(context, attrs, defStyleAttr, 0);
-    }
-
-    public ElasticDragDismissFrameLayout(Context context, AttributeSet attrs,
-                                         int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
+        super(context, attrs, defStyleAttr);
 
         dragDismissDistance = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 80, getResources().getDisplayMetrics());
         dragDismissFraction = 0.7f;
@@ -73,29 +89,6 @@ public class ElasticDragDismissFrameLayout extends FrameLayout {
         shouldScale = true;
     }
 
-    public static abstract class ElasticDragDismissCallback {
-
-        /**
-         * Called for each drag event.
-         *
-         * @param elasticOffset       Indicating the drag offset with elasticity applied i.e. may
-         *                            exceed 1.
-         * @param elasticOffsetPixels The elastically scaled drag distance in pixels.
-         * @param rawOffset           Value from [0, 1] indicating the raw drag offset i.e.
-         *                            without elasticity applied. A value of 1 indicates that the
-         *                            dismiss distance has been reached.
-         * @param rawOffsetPixels     The raw distance the user has dragged
-         */
-        public void onDrag(float elasticOffset, float elasticOffsetPixels,
-                    float rawOffset, float rawOffsetPixels) { }
-
-        /**
-         * Called when dragging is released and has exceeded the threshold dismiss distance.
-         */
-        public void onDragDismissed() { }
-
-    }
-
     @Override
     public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) {
         return (nestedScrollAxes & View.SCROLL_AXIS_VERTICAL) != 0;
@@ -126,7 +119,7 @@ public class ElasticDragDismissFrameLayout extends FrameLayout {
                     .scaleX(1f)
                     .scaleY(1f)
                     .setDuration(200L)
-                    .setInterpolator(AnimationUtils.loadInterpolator(getContext(), android.R.interpolator.fast_out_slow_in))
+                    .setInterpolator(new FastOutSlowInInterpolator())
                     .setListener(null)
                     .start();
             totalDrag = 0;
@@ -135,6 +128,24 @@ public class ElasticDragDismissFrameLayout extends FrameLayout {
         }
     }
 
+    @Override
+    public boolean onNestedFling(View target, float velocityX, float velocityY, boolean consumed) {
+        return false;
+    }
+
+    @Override
+    public boolean onNestedPreFling(View target, float velocityX, float velocityY) {
+        return false;
+    }
+
+    @Override
+    public int getNestedScrollAxes() {
+        return 0;
+    }
+
+    @Override
+    public void onNestedScrollAccepted(View child, View target, int axes) { }
+
     @Override
     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
         super.onSizeChanged(w, h, oldw, oldh);
@@ -171,6 +182,9 @@ public class ElasticDragDismissFrameLayout extends FrameLayout {
             draggingUp = true;
             if (shouldScale) setPivotY(0f);
         }
+
+        setPivotX(getWidth() / 2);
+
         // how far have we dragged relative to the distance to perform a dismiss
         // (0–1 where 1 = dismiss distance). Decreasing logarithmically as we approach the limit
         float dragFraction = (float) Math.log10(1 + (Math.abs(totalDrag) / dragDismissDistance));

demo/src/main/res/layout/activity_main.xml

@@ -1,9 +1,31 @@
 <?xml version="1.0" encoding="utf-8"?>
-<com.bluelinelabs.conductor.ChangeHandlerFrameLayout
-    android:id="@+id/controller_container"
+<android.support.design.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context="com.bluelinelabs.conductor.demo.MainActivity"
-    />
+    android:fitsSystemWindows="true"
+    tools:context="com.bluelinelabs.conductor.demo.MainActivity">
+
+    <android.support.design.widget.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+            />
+
+    </android.support.design.widget.AppBarLayout>
+
+    <com.bluelinelabs.conductor.ChangeHandlerFrameLayout
+        android:id="@+id/controller_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"
+        />
+
+</android.support.design.widget.CoordinatorLayout>

demo/src/main/res/layout/controller_drag_dismiss.xml

@@ -14,17 +14,16 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
-            android:textSize="28sp"
+            android:textSize="22sp"
             android:padding="16dp"
             android:text="@string/drag_to_dismiss"
             />
 
-        <ScrollView
+        <android.support.v4.widget.NestedScrollView
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:clipToPadding="false"
             android:fillViewport="true"
-            android:nestedScrollingEnabled="true"
             android:overScrollFooter="@android:color/transparent"
             android:overScrollMode="never" >
 
@@ -36,7 +35,7 @@
                 android:padding="16dp"
                 />
 
-        </ScrollView>
+        </android.support.v4.widget.NestedScrollView>
     </LinearLayout>
 
 </com.bluelinelabs.conductor.demo.widget.ElasticDragDismissFrameLayout>

demo/src/main/res/layout/controller_overlay.xml

@@ -4,20 +4,21 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="#88000000"
-    android:clickable="true" >
+    android:clickable="true">
 
     <FrameLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_gravity="center"
         android:layout_margin="32dp"
-        android:background="@android:color/white" >
+        android:background="@android:color/white">
 
         <TextView
             android:id="@+id/text_view"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
+            android:padding="16dp"
             />
 
     </FrameLayout>

demo/src/main/res/layout/controller_pager.xml

@@ -3,16 +3,16 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:background="@color/green_300"
-    android:orientation="vertical" >
+    android:orientation="vertical">
 
-    <TextView
-        android:layout_width="wrap_content"
+    <android.support.design.widget.TabLayout
+        android:id="@+id/tab_layout"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_gravity="center_horizontal"
-        android:textSize="28sp"
-        android:padding="16dp"
-        android:text="@string/view_pager"
+        android:background="?attr/colorPrimary"
+        android:elevation="6dp"
+        android:minHeight="?attr/actionBarSize"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
         />
 
     <android.support.v4.view.ViewPager

demo/src/main/res/menu/home.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto"
+      xmlns:tools="http://schemas.android.com/tools"
+      tools:ignore="AlwaysShowAction">
+
+    <item
+        android:id="@+id/about"
+        android:title="@string/about"
+        app:showAsAction="always"
+        />
+
+</menu>

demo/src/main/res/values/colors.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <color name="colorPrimary">#78909c</color>
-    <color name="colorPrimaryDark">#37474f</color>
+    <color name="colorPrimary">#263239</color>
+    <color name="colorPrimaryDark">#21272c</color>
     <color name="colorAccent">#1976d2</color>
 
     <color name="white">@android:color/white</color>

demo/src/main/res/values/strings.xml

@@ -2,6 +2,9 @@
 <resources>
     <string name="app_name">Conductor Demo</string>
 
+    <!-- Home Controller -->
+    <string name="about">About</string>
+
     <!-- Navigation Demo -->
     <string name="pop_to_root">Pop to Root</string>
     <string name="go_up">Go Up</string>
@@ -13,9 +16,6 @@
     <string name="transition_tag_dot">transition.dot</string>
     <string name="transition_tag_title">transition.title</string>
 
-    <!-- View Pager Demo -->
-    <string name="view_pager">View Pager</string>
-
     <!-- Parent Controller Demo -->
     <string name="parent_controller">Parent Controller</string>
     <string name="go_to_next_parent">Go to next parent</string>
@@ -27,7 +27,7 @@
     <string name="use_title">Use Title</string>
 
     <!-- Drag Dismiss Demo -->
-    <string name="drag_to_dismiss">Drag to Dismiss</string>
+    <string name="drag_to_dismiss">Elastic scrolling view - scroll past bounds to dismiss.</string>
 
     <!-- RxLifecycle Demo -->
     <string name="rxlifecycle_title">Watch tag %1$s on logcat for a demo.</string>

demo/src/main/res/values/styles.xml

@@ -5,10 +5,10 @@
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>
         <item name="android:windowBackground">@color/white</item>
-        <item name="android:textViewStyle">@style/TextView</item>
+        <item name="android:textViewStyle">@style/AppTheme.TextView</item>
     </style>
 
-    <style name="TextView" parent="@android:style/Widget.TextView">
+    <style name="AppTheme.TextView" parent="@android:style/Widget.TextView">
         <item name="android:textSize">20sp</item>
     </style>
 

dependencies.gradle

@@ -5,8 +5,8 @@ ext {
     buildToolsVersion = '23.0.2'
 
     versionCode = 1
-    versionName = '1.1.1'
-    publishedVersionName = '1.1.1'
+    versionName = '1.1.3'
+    publishedVersionName = '1.1.3'
 
     supportV4 = 'com.android.support:support-v4:23.1.1'
     supportDesign = 'com.android.support:design:23.1.1'
@@ -15,8 +15,8 @@ ext {
 
     butterknife = 'com.jakewharton:butterknife:7.0.1'
 
-    leakCanary = 'com.squareup.leakcanary:leakcanary-android:1.4-beta1'
-    leakCanaryNoOp = 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta1'
+    leakCanary = 'com.squareup.leakcanary:leakcanary-android:1.4-beta2'
+    leakCanaryNoOp = 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta2'
 
     rxJava = 'io.reactivex:rxjava:1.1.0'
     rxAndroid = 'io.reactivex:rxandroid:1.1.0'