Merge "[RenderScript] Add docs for IntrinsicBLAS" into mnc-dev
diff --git a/design/src/android/support/design/widget/AppBarLayout.java b/design/src/android/support/design/widget/AppBarLayout.java
index 9808e5e..12024ba 100644
--- a/design/src/android/support/design/widget/AppBarLayout.java
+++ b/design/src/android/support/design/widget/AppBarLayout.java
@@ -33,9 +33,7 @@
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
-import java.lang.ref.WeakReference;
 import java.util.ArrayList;
-import java.util.Iterator;
 import java.util.List;
 
 /**
@@ -130,7 +128,7 @@
 
     private WindowInsetsCompat mLastInsets;
 
-    private final List<WeakReference<OnOffsetChangedListener>> mListeners;
+    private final List<OnOffsetChangedListener> mListeners;
 
     public AppBarLayout(Context context) {
         this(context, null);
@@ -175,14 +173,9 @@
      * @see #removeOnOffsetChangedListener(OnOffsetChangedListener)
      */
     public void addOnOffsetChangedListener(OnOffsetChangedListener listener) {
-        for (int i = 0, z = mListeners.size(); i < z; i++) {
-            final WeakReference<OnOffsetChangedListener> ref = mListeners.get(i);
-            if (ref != null && ref.get() == listener) {
-                // Listener already added
-                return;
-            }
+        if (listener != null && !mListeners.contains(listener)) {
+            mListeners.add(listener);
         }
-        mListeners.add(new WeakReference<>(listener));
     }
 
     /**
@@ -191,14 +184,8 @@
      * @param listener the listener to remove.
      */
     public void removeOnOffsetChangedListener(OnOffsetChangedListener listener) {
-        final Iterator<WeakReference<OnOffsetChangedListener>> i = mListeners.iterator();
-        while (i.hasNext()) {
-            final WeakReference<OnOffsetChangedListener> ref = i.next();
-            final OnOffsetChangedListener item = ref.get();
-            if (item == listener || item == null) {
-                // If the item is null, or is our given listener, remove
-                i.remove();
-            }
+        if (listener != null) {
+            mListeners.remove(listener);
         }
     }
 
@@ -915,14 +902,12 @@
         }
 
         private void dispatchOffsetUpdates(AppBarLayout layout) {
-            final List<WeakReference<OnOffsetChangedListener>> listeners = layout.mListeners;
+            final List<OnOffsetChangedListener> listeners = layout.mListeners;
 
             // Iterate backwards through the list so that most recently added listeners
             // get the first chance to decide
             for (int i = 0, z = listeners.size(); i < z; i++) {
-                final WeakReference<OnOffsetChangedListener> ref = listeners.get(i);
-                final OnOffsetChangedListener listener = ref != null ? ref.get() : null;
-
+                final OnOffsetChangedListener listener = listeners.get(i);
                 if (listener != null) {
                     listener.onOffsetChanged(layout, getTopAndBottomOffset());
                 }
diff --git a/v14/preference/src/android/support/v14/preference/PreferenceFragment.java b/v14/preference/src/android/support/v14/preference/PreferenceFragment.java
index a51dab3..e8cb6b6 100644
--- a/v14/preference/src/android/support/v14/preference/PreferenceFragment.java
+++ b/v14/preference/src/android/support/v14/preference/PreferenceFragment.java
@@ -406,8 +406,8 @@
     public boolean onPreferenceTreeClick(Preference preference) {
         if (preference.getFragment() != null) {
             boolean handled = false;
-            if (getTargetFragment() instanceof OnPreferenceStartFragmentCallback) {
-                handled = ((OnPreferenceStartFragmentCallback) getTargetFragment())
+            if (getCallbackFragment() instanceof OnPreferenceStartFragmentCallback) {
+                handled = ((OnPreferenceStartFragmentCallback) getCallbackFragment())
                         .onPreferenceStartFragment(this, preference);
             }
             if (!handled && getActivity() instanceof OnPreferenceStartFragmentCallback){
@@ -432,8 +432,8 @@
     @Override
     public void onNavigateToScreen(PreferenceScreen preferenceScreen) {
         boolean handled = false;
-        if (getTargetFragment() instanceof OnPreferenceStartScreenCallback) {
-            handled = ((OnPreferenceStartScreenCallback) getTargetFragment())
+        if (getCallbackFragment() instanceof OnPreferenceStartScreenCallback) {
+            handled = ((OnPreferenceStartScreenCallback) getCallbackFragment())
                     .onPreferenceStartScreen(this, preferenceScreen);
         }
         if (!handled && getActivity() instanceof OnPreferenceStartScreenCallback) {
@@ -541,8 +541,8 @@
     public void onDisplayPreferenceDialog(Preference preference) {
 
         boolean handled = false;
-        if (getTargetFragment() instanceof OnPreferenceDisplayDialogCallback) {
-            handled = ((OnPreferenceDisplayDialogCallback) getTargetFragment())
+        if (getCallbackFragment() instanceof OnPreferenceDisplayDialogCallback) {
+            handled = ((OnPreferenceDisplayDialogCallback) getCallbackFragment())
                     .onPreferenceDisplayDialog(this, preference);
         }
         if (!handled && getActivity() instanceof OnPreferenceDisplayDialogCallback) {
@@ -574,4 +574,12 @@
         f.show(getFragmentManager(), DIALOG_FRAGMENT_TAG);
     }
 
+    /**
+     * Basically a wrapper for getParentFragment which is v17+. Used by the leanback preference lib.
+     * @return Fragment to possibly use as a callback
+     * @hide
+     */
+    public Fragment getCallbackFragment() {
+        return null;
+    }
 }
diff --git a/v17/preference-leanback/api/current.txt b/v17/preference-leanback/api/current.txt
index b31306c..675a18e 100644
--- a/v17/preference-leanback/api/current.txt
+++ b/v17/preference-leanback/api/current.txt
@@ -60,8 +60,8 @@
     ctor public LeanbackSettingsFragment();
     method public boolean onPreferenceDisplayDialog(android.support.v14.preference.PreferenceFragment, android.support.v7.preference.Preference);
     method public abstract void onPreferenceStartInitialScreen();
-    method public void startImmersiveFragment(android.app.Fragment, java.lang.String);
-    method public void startPreferenceFragment(android.app.Fragment, java.lang.String);
+    method public void startImmersiveFragment(android.app.Fragment);
+    method public void startPreferenceFragment(android.app.Fragment);
   }
 
 }
diff --git a/v17/preference-leanback/res/layout/leanback_settings_fragment.xml b/v17/preference-leanback/res/layout/leanback_settings_fragment.xml
index 5cf3e51..e9c421e 100644
--- a/v17/preference-leanback/res/layout/leanback_settings_fragment.xml
+++ b/v17/preference-leanback/res/layout/leanback_settings_fragment.xml
@@ -15,6 +15,12 @@
   ~ limitations under the License
   -->
 <android.support.v17.preference.LeanbackSettingsRootView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/settings_fragment_container"
+    android:id="@+id/settings_dialog_container"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"/>
+    android:layout_height="match_parent">
+    <FrameLayout
+        android:id="@+id/settings_preference_fragment_container"
+        android:layout_width="@dimen/lb_settings_pane_width"
+        android:layout_height="match_parent"
+        android:layout_gravity="end"/>
+</android.support.v17.preference.LeanbackSettingsRootView>
diff --git a/v17/preference-leanback/res/layout/leanback_settings_fragment_stack.xml b/v17/preference-leanback/res/layout/leanback_settings_fragment_stack.xml
deleted file mode 100644
index 568c41e..0000000
--- a/v17/preference-leanback/res/layout/leanback_settings_fragment_stack.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright (C) 2015 The Android Open Source Project
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~      http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License
-  -->
-<android.support.v17.leanback.view.StackedLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:id="@+id/settings_preference_stack"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    app:cardWidth="@dimen/lb_settings_card_width"
-    app:stackShift="@dimen/lb_settings_card_shift"
-    app:elevationIncrement="@dimen/lb_settings_card_elevation"
-    />
diff --git a/v17/preference-leanback/res/values/dimens.xml b/v17/preference-leanback/res/values/dimens.xml
index c3e519f..49763fe 100644
--- a/v17/preference-leanback/res/values/dimens.xml
+++ b/v17/preference-leanback/res/values/dimens.xml
@@ -21,7 +21,5 @@
   <dimen name="lb_preference_decor_title_padding_end">56dp</dimen>
   <dimen name="lb_preference_decor_title_text_size">20sp</dimen>
 
-  <dimen name="lb_settings_card_width">360dp</dimen>
-  <dimen name="lb_settings_card_shift">72dp</dimen>
-  <dimen name="lb_settings_card_elevation">12dp</dimen>
+  <dimen name="lb_settings_pane_width">360dp</dimen>
 </resources>
diff --git a/v17/preference-leanback/src/android/support/v17/preference/BaseLeanbackPreferenceFragment.java b/v17/preference-leanback/src/android/support/v17/preference/BaseLeanbackPreferenceFragment.java
index 40d9607..6fc1fa6 100644
--- a/v17/preference-leanback/src/android/support/v17/preference/BaseLeanbackPreferenceFragment.java
+++ b/v17/preference-leanback/src/android/support/v17/preference/BaseLeanbackPreferenceFragment.java
@@ -16,6 +16,7 @@
 
 package android.support.v17.preference;
 
+import android.app.Fragment;
 import android.os.Bundle;
 import android.support.v14.preference.PreferenceFragment;
 import android.support.v17.leanback.widget.VerticalGridView;
@@ -38,4 +39,12 @@
         verticalGridView.setFocusScrollStrategy(VerticalGridView.FOCUS_SCROLL_ALIGNED);
         return verticalGridView;
     }
+
+    /**
+     * @hide
+     */
+    @Override
+    public Fragment getCallbackFragment() {
+        return getParentFragment();
+    }
 }
diff --git a/v17/preference-leanback/src/android/support/v17/preference/LeanbackSettingsFragment.java b/v17/preference-leanback/src/android/support/v17/preference/LeanbackSettingsFragment.java
index 38ef3d9..c6a7e94 100644
--- a/v17/preference-leanback/src/android/support/v17/preference/LeanbackSettingsFragment.java
+++ b/v17/preference-leanback/src/android/support/v17/preference/LeanbackSettingsFragment.java
@@ -20,12 +20,10 @@
 import android.app.FragmentTransaction;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
 import android.support.v14.preference.MultiSelectListPreference;
 import android.support.v14.preference.PreferenceFragment;
 import android.support.v7.preference.ListPreference;
 import android.support.v7.preference.Preference;
-import android.support.v7.preference.PreferenceScreen;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -36,10 +34,8 @@
         PreferenceFragment.OnPreferenceStartScreenCallback,
         PreferenceFragment.OnPreferenceDisplayDialogCallback {
 
-    private static final String SETTINGS_FRAGMENT_INNER_TAG =
-            "android.support.v17.preference.LeanbackSettingsFragment.INNER_FRAGMENT";
-
-    private boolean mInitialScreen;
+    private static final String PREFERENCE_FRAGMENT_TAG =
+            "android.support.v17.preference.LeanbackSettingsFragment.PREFERENCE_FRAGMENT";
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
@@ -56,14 +52,7 @@
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         if (savedInstanceState == null) {
-            final Fragment f = new LeanbackSettingsFragmentInner();
-            getChildFragmentManager().beginTransaction()
-                    .add(R.id.settings_fragment_container, f, SETTINGS_FRAGMENT_INNER_TAG)
-                    .commit();
-            getChildFragmentManager().executePendingTransactions();
-            mInitialScreen = true;
             onPreferenceStartInitialScreen();
-            mInitialScreen = false;
         }
     }
 
@@ -73,11 +62,11 @@
         if (pref instanceof ListPreference) {
             final ListPreference listPreference = (ListPreference) pref;
             f = LeanbackListPreferenceDialogFragment.newInstanceSingle(listPreference.getKey());
-            getInnerFragment().startDialogFragment(f, caller, null);
+            startImmersiveFragment(f);
         } else if (pref instanceof MultiSelectListPreference) {
             MultiSelectListPreference listPreference = (MultiSelectListPreference) pref;
             f = LeanbackListPreferenceDialogFragment.newInstanceMulti(listPreference.getKey());
-            getInnerFragment().startDialogFragment(f, caller, null);
+            startImmersiveFragment(f);
         }
         // TODO
 //        else if (pref instanceof EditTextPreference) {
@@ -92,7 +81,7 @@
     /**
      * Called to instantiate the initial {@link android.support.v14.preference.PreferenceFragment}
      * to be shown in this fragment. Implementations are expected to call
-     * {@link #startPreferenceFragment(android.app.Fragment, java.lang.String)}.
+     * {@link #startPreferenceFragment(android.app.Fragment)}.
      */
     public abstract void onPreferenceStartInitialScreen();
 
@@ -101,171 +90,49 @@
      * list-style fragments on top of the stack of preference fragments.
      *
      * @param fragment Fragment instance to be added.
-     * @param tag Fragment tag
      */
-    public void startPreferenceFragment(@NonNull Fragment fragment, @Nullable String tag) {
-        getInnerFragment().startStackedFragment(fragment, tag, !mInitialScreen);
+    public void startPreferenceFragment(@NonNull Fragment fragment) {
+        fragment.setTargetFragment(this, 0);
+        final FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
+        final Fragment prevFragment =
+                getChildFragmentManager().findFragmentByTag(PREFERENCE_FRAGMENT_TAG);
+        if (prevFragment != null) {
+            transaction
+                    .addToBackStack(null)
+                    .replace(R.id.settings_preference_fragment_container, fragment,
+                            PREFERENCE_FRAGMENT_TAG);
+        } else {
+            transaction
+                    .add(R.id.settings_preference_fragment_container, fragment,
+                            PREFERENCE_FRAGMENT_TAG);
+        }
+        transaction.commit();
     }
 
     /**
      * Displays a fragment to the user, temporarily replacing the contents of this fragment.
      *
      * @param fragment Fragment instance to be added.
-     * @param tag Fragment tag
      */
-    public void startImmersiveFragment(@NonNull Fragment fragment, @Nullable String tag) {
-        getChildFragmentManager().beginTransaction()
-                .replace(R.id.settings_fragment_container, fragment, tag)
+    public void startImmersiveFragment(@NonNull Fragment fragment) {
+        final FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
+        final Fragment preferenceFragment =
+                getChildFragmentManager().findFragmentByTag(PREFERENCE_FRAGMENT_TAG);
+        if (preferenceFragment != null) {
+            transaction.hide(preferenceFragment);
+        }
+        transaction
+                .add(R.id.settings_dialog_container, fragment)
                 .addToBackStack(null)
                 .commit();
     }
 
-    private LeanbackSettingsFragmentInner getInnerFragment() {
-        return (LeanbackSettingsFragmentInner)
-                getChildFragmentManager().findFragmentByTag(SETTINGS_FRAGMENT_INNER_TAG);
-    }
-
-    private boolean handleBackPress() {
-        final LeanbackSettingsFragmentInner inner = getInnerFragment();
-        boolean handled = false;
-        if (inner != null && inner.isVisible()) {
-            handled = inner.handleBackPress();
-        }
-        return handled || getChildFragmentManager().popBackStackImmediate();
-    }
-
-    /**
-     * @hide
-     */
-    public static class LeanbackSettingsFragmentInner extends Fragment
-            implements LeanbackPreferenceDialogFragment.TargetFragment {
-
-        private static final String SAVESTATE_TARGET_PREF_FRAG =
-                "android.support.v17.preference.LeanbackSettingsFragment.TARGET_PREF_FRAG";
-
-        private static final String TARGET_FRAGMENT_TAG =
-                "android.support.v17.preference.LeanbackSettingsFragment.TARGET";
-
-        // Preference fragment which last launched a dialog
-        private PreferenceFragment mTargetPreferenceFragment;
-
-        @Override
-        public void onCreate(Bundle savedInstanceState) {
-            super.onCreate(savedInstanceState);
-
-            if (savedInstanceState != null &&
-                    savedInstanceState.containsKey(SAVESTATE_TARGET_PREF_FRAG)) {
-                mTargetPreferenceFragment = (PreferenceFragment) getChildFragmentManager()
-                        .getFragment(savedInstanceState, SAVESTATE_TARGET_PREF_FRAG);
-            }
-        }
-
-        @Override
-        public @Nullable View onCreateView(LayoutInflater inflater, ViewGroup container,
-                Bundle savedInstanceState) {
-            return inflater.inflate(R.layout.leanback_settings_fragment_stack,
-                    container, false);
-        }
-
-        @Override
-        public void onSaveInstanceState(Bundle outState) {
-            super.onSaveInstanceState(outState);
-            if (mTargetPreferenceFragment != null) {
-                getChildFragmentManager().putFragment(outState, SAVESTATE_TARGET_PREF_FRAG,
-                        mTargetPreferenceFragment);
-            }
-        }
-
-        public void startDialogFragment(@NonNull Fragment dialogFragment,
-                @NonNull PreferenceFragment requestingFragment, @Nullable String tag) {
-            mTargetPreferenceFragment = requestingFragment;
-            startFragment(dialogFragment, tag, true);
-        }
-
-        public void startStackedFragment(@NonNull Fragment fragment, @Nullable String tag,
-                boolean addToBackstack) {
-            fragment.setTargetFragment(findTarget(), 0);
-            startFragment(fragment, tag, addToBackstack);
-        }
-
-        private void startFragment(@NonNull Fragment fragment, @Nullable String tag,
-                boolean addToBackstack) {
-            final FragmentTransaction transaction = getChildFragmentManager().beginTransaction()
-                    .add(R.id.settings_preference_stack, fragment, tag);
-            if (addToBackstack) {
-                transaction.addToBackStack(null);
-            }
-            transaction.commit();
-        }
-
-        private Fragment findTarget() {
-            Fragment target =
-                    getChildFragmentManager().findFragmentByTag(TARGET_FRAGMENT_TAG);
-            if (target == null) {
-                target = new Target();
-                getChildFragmentManager().beginTransaction()
-                        .add(target, TARGET_FRAGMENT_TAG)
-                        .commit();
-                getChildFragmentManager().executePendingTransactions();
-            }
-            return target;
-        }
-
-        public boolean handleBackPress() {
-            return getChildFragmentManager().popBackStackImmediate();
-        }
-
-        public Preference findPreference(CharSequence key) {
-            return mTargetPreferenceFragment.findPreference(key);
-        }
-
-        public PreferenceFragment getPreferenceFragment() {
-            return mTargetPreferenceFragment;
-        }
-
-        @Override
-        public LeanbackSettingsFragment getSettingsFragment() {
-            return (LeanbackSettingsFragment) getParentFragment();
-        }
-
-        // This looks terrible, and it is. We need this because the target fragment needs to be
-        // in the same FragmentManager as the fragment targeting it.
-        /**
-         * @hide
-         */
-        public static class Target extends Fragment
-                implements PreferenceFragment.OnPreferenceStartFragmentCallback,
-                PreferenceFragment.OnPreferenceStartScreenCallback,
-                PreferenceFragment.OnPreferenceDisplayDialogCallback {
-
-            private LeanbackSettingsFragment getOuterParent() {
-                return (LeanbackSettingsFragment) getParentFragment().getParentFragment();
-            }
-
-            @Override
-            public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
-                return getOuterParent().onPreferenceStartFragment(caller, pref);
-            }
-
-            @Override
-            public boolean onPreferenceStartScreen(PreferenceFragment caller,
-                    PreferenceScreen pref) {
-                return getOuterParent().onPreferenceStartScreen(caller, pref);
-            }
-
-            @Override
-            public boolean onPreferenceDisplayDialog(PreferenceFragment caller, Preference pref) {
-                return getOuterParent().onPreferenceDisplayDialog(caller, pref);
-            }
-        }
-    }
-
     private class RootViewOnKeyListener implements View.OnKeyListener {
 
         @Override
         public boolean onKey(View v, int keyCode, KeyEvent event) {
             if (keyCode == KeyEvent.KEYCODE_BACK) {
-                return handleBackPress();
+                return getChildFragmentManager().popBackStackImmediate();
             } else {
                 return false;
             }
diff --git a/v4/java/android/support/v4/app/BackStackRecord.java b/v4/java/android/support/v4/app/BackStackRecord.java
index f2eaad5..24cf866 100644
--- a/v4/java/android/support/v4/app/BackStackRecord.java
+++ b/v4/java/android/support/v4/app/BackStackRecord.java
@@ -672,12 +672,13 @@
                 } break;
                 case OP_REPLACE: {
                     Fragment f = op.fragment;
+                    int containerId = f.mContainerId;
                     if (mManager.mAdded != null) {
                         for (int i=0; i<mManager.mAdded.size(); i++) {
                             Fragment old = mManager.mAdded.get(i);
                             if (FragmentManagerImpl.DEBUG) Log.v(TAG,
                                     "OP_REPLACE: adding=" + f + " old=" + old);
-                            if (f == null || old.mContainerId == f.mContainerId) {
+                            if (old.mContainerId == containerId) {
                                 if (old == f) {
                                     op.fragment = f = null;
                                 } else {
diff --git a/v4/java/android/support/v4/view/PagerTitleStrip.java b/v4/java/android/support/v4/view/PagerTitleStrip.java
index cb9cd75..72a83e6 100644
--- a/v4/java/android/support/v4/view/PagerTitleStrip.java
+++ b/v4/java/android/support/v4/view/PagerTitleStrip.java
@@ -290,10 +290,11 @@
 
         // Measure everything
         final int width = getWidth() - getPaddingLeft() - getPaddingRight();
+        final int maxWidth = Math.max(0, (int) (width * 0.8f));
+        final int childWidthSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST);
         final int childHeight = getHeight() - getPaddingTop() - getPaddingBottom();
-        final int childWidthSpec = MeasureSpec.makeMeasureSpec((int) (width * 0.8f),
-                MeasureSpec.AT_MOST);
-        final int childHeightSpec = MeasureSpec.makeMeasureSpec(childHeight, MeasureSpec.AT_MOST);
+        final int maxHeight = Math.max(0, childHeight);
+        final int childHeightSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST);
         mPrevText.measure(childWidthSpec, childHeightSpec);
         mCurrText.measure(childWidthSpec, childHeightSpec);
         mNextText.measure(childWidthSpec, childHeightSpec);
@@ -436,9 +437,10 @@
         padding = getPaddingTop() + getPaddingBottom();
         childHeight -= padding;
 
-        final int childWidthSpec = MeasureSpec.makeMeasureSpec((int) (widthSize * 0.8f),
-                MeasureSpec.AT_MOST);
-        final int childHeightSpec = MeasureSpec.makeMeasureSpec(childHeight, MeasureSpec.AT_MOST);
+        final int maxWidth = Math.max(0, (int) (widthSize * 0.8f));
+        final int childWidthSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST);
+        final int maxHeight = Math.min(0, childHeight);
+        final int childHeightSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST);
 
         mPrevText.measure(childWidthSpec, childHeightSpec);
         mCurrText.measure(childWidthSpec, childHeightSpec);
diff --git a/v7/mediarouter/src/android/support/v7/app/MediaRouteButton.java b/v7/mediarouter/src/android/support/v7/app/MediaRouteButton.java
index 8a5f507..379ba80 100644
--- a/v7/mediarouter/src/android/support/v7/app/MediaRouteButton.java
+++ b/v7/mediarouter/src/android/support/v7/app/MediaRouteButton.java
@@ -22,6 +22,7 @@
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
 import android.graphics.Rect;
+import android.graphics.drawable.AnimationDrawable;
 import android.graphics.drawable.Drawable;
 import android.support.annotation.NonNull;
 import android.support.v4.app.FragmentActivity;
@@ -505,6 +506,13 @@
 
             if (needsRefresh) {
                 refreshDrawableState();
+                if (mIsConnecting && mRemoteIndicator.getCurrent() instanceof AnimationDrawable) {
+                    AnimationDrawable curDrawable =
+                            (AnimationDrawable) mRemoteIndicator.getCurrent();
+                    if (!curDrawable.isRunning()) {
+                        curDrawable.start();
+                    }
+                }
             }
 
             setEnabled(mRouter.isRouteAvailable(mSelector,