AppBarLayout.java revision ab809dd75ef2f73b312038f2c10473cfa5885a58
1a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes/* 2a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Copyright (C) 2015 The Android Open Source Project 3a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 4a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Licensed under the Apache License, Version 2.0 (the "License"); 5a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * you may not use this file except in compliance with the License. 6a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * You may obtain a copy of the License at 7a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 8a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * http://www.apache.org/licenses/LICENSE-2.0 9a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 10a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Unless required by applicable law or agreed to in writing, software 11a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * distributed under the License is distributed on an "AS IS" BASIS, 12a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * See the License for the specific language governing permissions and 14a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * limitations under the License. 15a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 16a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 17a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banespackage android.support.design.widget; 18a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 19a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.content.Context; 20a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.content.res.TypedArray; 21e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banesimport android.os.Parcel; 22e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banesimport android.os.Parcelable; 2350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banesimport android.support.annotation.IntDef; 24a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.support.design.R; 25d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banesimport android.support.v4.view.MotionEventCompat; 26a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.support.v4.view.ViewCompat; 276ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banesimport android.support.v4.view.WindowInsetsCompat; 28631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banesimport android.support.v4.widget.ScrollerCompat; 29a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.util.AttributeSet; 30d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banesimport android.view.MotionEvent; 31a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.View; 32d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banesimport android.view.ViewConfiguration; 33a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.ViewGroup; 34a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.animation.Interpolator; 35a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.widget.LinearLayout; 36a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 3750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banesimport java.lang.annotation.Retention; 3850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banesimport java.lang.annotation.RetentionPolicy; 39d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banesimport java.lang.ref.WeakReference; 40631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banesimport java.util.ArrayList; 41a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport java.util.List; 42a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 43a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes/** 44a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * AppBarLayout is a vertical {@link LinearLayout} which implements many of the features of 459fb154338a62edc2c57dc036895199d6f1769400Chris Banes * material designs app bar concept, namely scrolling gestures. 46a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <p> 47a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Children should provide their desired scrolling behavior through 48a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link LayoutParams#setScrollFlags(int)} and the associated layout xml attribute: 49a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@code app:layout_scrollFlags}. 50a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 51a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <p> 52a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * This view depends heavily on being used as a direct child within a {@link CoordinatorLayout}. 53a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * If you use AppBarLayout within a different {@link ViewGroup}, most of it's functionality will 54a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * not work. 55a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <p> 569fb154338a62edc2c57dc036895199d6f1769400Chris Banes * AppBarLayout also requires a separate scrolling sibling in order to know when to scroll. 579fb154338a62edc2c57dc036895199d6f1769400Chris Banes * The binding is done through the {@link ScrollingViewBehavior} behavior class, meaning that you 589fb154338a62edc2c57dc036895199d6f1769400Chris Banes * should set your scrolling view's behavior to be an instance of {@link ScrollingViewBehavior}. 599fb154338a62edc2c57dc036895199d6f1769400Chris Banes * A string resource containing the full class name is available. 60a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 61a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <pre> 62a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.design.widget.CoordinatorLayout 63a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * xmlns:android="http://schemas.android.com/apk/res/android" 64a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * xmlns:app="http://schemas.android.com/apk/res-auto" 65a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_width="match_parent" 66a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_height="match_parent"> 67a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 68a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.v4.widget.NestedScrollView 69a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_width="match_parent" 70a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_height="match_parent" 71a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * app:layout_behavior="@string/appbar_scrolling_view_behavior"> 72a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 73a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <!-- Your scrolling content --> 74a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 75a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </android.support.v4.widget.NestedScrollView> 76a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 77a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.design.widget.AppBarLayout 78a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_height="wrap_content" 79a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * android:layout_width="match_parent"> 80a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 81a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.v7.widget.Toolbar 82a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * ... 83a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * app:layout_scrollFlags="scroll|enterAlways"/> 84a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 85a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * <android.support.design.widget.TabLayout 86a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * ... 87a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * app:layout_scrollFlags="scroll|enterAlways"/> 88a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 89a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </android.support.design.widget.AppBarLayout> 90a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 91a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </android.support.design.widget.CoordinatorLayout> 92a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * </pre> 93a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 94a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see <a href="http://www.google.com/design/spec/layout/structure.html#structure-app-bar"> 95a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * http://www.google.com/design/spec/layout/structure.html#structure-app-bar</a> 96a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 97a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes@CoordinatorLayout.DefaultBehavior(AppBarLayout.Behavior.class) 98a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banespublic class AppBarLayout extends LinearLayout { 99a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1009995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes private static final int PENDING_ACTION_NONE = 0x0; 1019995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes private static final int PENDING_ACTION_EXPANDED = 0x1; 1029995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes private static final int PENDING_ACTION_COLLAPSED = 0x2; 1039995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes private static final int PENDING_ACTION_ANIMATE_ENABLED = 0x4; 1049995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 105a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 106631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Interface definition for a callback to be invoked when an {@link AppBarLayout}'s vertical 107631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * offset changes. 108a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 109631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public interface OnOffsetChangedListener { 110a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 111a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Called when the {@link AppBarLayout}'s layout offset has been changed. This allows 112a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * child views to implement custom behavior based on the offset (for instance pinning a 113a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * view at a certain y value). 114a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 115631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @param appBarLayout the {@link AppBarLayout} which offset has changed 11650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes * @param verticalOffset the vertical offset for the parent {@link AppBarLayout}, in px 117a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 118631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset); 119a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 120a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 121a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private static final int INVALID_SCROLL_RANGE = -1; 122a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 123a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int mTotalScrollRange = INVALID_SCROLL_RANGE; 124a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int mDownPreScrollRange = INVALID_SCROLL_RANGE; 125a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int mDownScrollRange = INVALID_SCROLL_RANGE; 126a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 127a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes boolean mHaveChildWithInterpolator; 128a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 12950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes private float mTargetElevation; 13050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 1319995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes private int mPendingAction = PENDING_ACTION_NONE; 1329995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 1336ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes private WindowInsetsCompat mLastInsets; 1346ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes 1356f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes private final List<OnOffsetChangedListener> mListeners; 136631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 137a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public AppBarLayout(Context context) { 138a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes this(context, null); 139a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 140a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 141a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public AppBarLayout(Context context, AttributeSet attrs) { 142a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(context, attrs); 143a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes setOrientation(VERTICAL); 14450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 14550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AppBarLayout, 14650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 0, R.style.Widget_Design_AppBarLayout); 14750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes mTargetElevation = a.getDimensionPixelSize(R.styleable.AppBarLayout_elevation, 0); 14881520564f3dd783136e025174021ba4eabd6ff3cChris Banes setBackgroundDrawable(a.getDrawable(R.styleable.AppBarLayout_android_background)); 1499995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (a.hasValue(R.styleable.AppBarLayout_expanded)) { 1509995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes setExpanded(a.getBoolean(R.styleable.AppBarLayout_expanded, false)); 1519995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 15250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes a.recycle(); 15350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 15450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // Use the bounds view outline provider so that we cast a shadow, even without a background 15550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes ViewUtils.setBoundsViewOutlineProvider(this); 156631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 157631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mListeners = new ArrayList<>(); 158631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 159631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes ViewCompat.setElevation(this, mTargetElevation); 1606ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes 1616ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes ViewCompat.setOnApplyWindowInsetsListener(this, 1626ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes new android.support.v4.view.OnApplyWindowInsetsListener() { 1636ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes @Override 1646ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes public WindowInsetsCompat onApplyWindowInsets(View v, 1656ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes WindowInsetsCompat insets) { 1666ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes setWindowInsets(insets); 1676ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes return insets.consumeSystemWindowInsets(); 1686ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes } 1696ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes }); 170631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 171631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 172631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes /** 173631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Add a listener that will be called when the offset of this {@link AppBarLayout} changes. 174631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 175631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @param listener The listener that will be called when the offset changes.] 176631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 177631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @see #removeOnOffsetChangedListener(OnOffsetChangedListener) 178631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes */ 179631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void addOnOffsetChangedListener(OnOffsetChangedListener listener) { 1806f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes if (listener != null && !mListeners.contains(listener)) { 1816f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes mListeners.add(listener); 182631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 183631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 184631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 185631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes /** 186631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Remove the previously added {@link OnOffsetChangedListener}. 187631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 188631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @param listener the listener to remove. 189631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes */ 190631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void removeOnOffsetChangedListener(OnOffsetChangedListener listener) { 1916f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes if (listener != null) { 1926f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes mListeners.remove(listener); 193631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 194a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 195a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 196a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 197a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected void onLayout(boolean changed, int l, int t, int r, int b) { 198a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super.onLayout(changed, l, t, r, b); 199a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 200a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Invalidate the scroll ranges 201a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mTotalScrollRange = INVALID_SCROLL_RANGE; 202a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mDownPreScrollRange = INVALID_SCROLL_RANGE; 203a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mDownPreScrollRange = INVALID_SCROLL_RANGE; 204a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 205a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mHaveChildWithInterpolator = false; 206a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 207a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 208a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams childLp = (LayoutParams) child.getLayoutParams(); 209a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final Interpolator interpolator = childLp.getScrollInterpolator(); 210a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 211a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (interpolator != null) { 212a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mHaveChildWithInterpolator = true; 213a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 214a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 215a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 216a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 217a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 218a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 219a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void setOrientation(int orientation) { 220a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (orientation != VERTICAL) { 221a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes throw new IllegalArgumentException("AppBarLayout is always vertical and does" 222a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes + " not support horizontal orientation"); 223a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 224a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super.setOrientation(orientation); 225a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 226a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 2279995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes /** 2289995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * Sets whether this {@link AppBarLayout} is expanded or not, animating if it has already 2299995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * been laid out. 2309995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2319995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * <p>As with {@link AppBarLayout}'s scrolling, this method relies on this layout being a 2329995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * direct child of a {@link CoordinatorLayout}.</p> 2339995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2349995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @param expanded true if the layout should be fully expanded, false if it should 2359995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * be fully collapsed 2369995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2379995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_expanded 2389995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes */ 2399995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes public void setExpanded(boolean expanded) { 2409995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes setExpanded(expanded, ViewCompat.isLaidOut(this)); 2419995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 2429995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 2439995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes /** 2449995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * Sets whether this {@link AppBarLayout} is expanded or not. 2459995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2469995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * <p>As with {@link AppBarLayout}'s scrolling, this method relies on this layout being a 2479995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * direct child of a {@link CoordinatorLayout}.</p> 2489995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2499995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @param expanded true if the layout should be fully expanded, false if it should 2509995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * be fully collapsed 2519995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @param animate Whether to animate to the new state 2529995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * 2539995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_expanded 2549995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes */ 2559995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes public void setExpanded(boolean expanded, boolean animate) { 2569995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes mPendingAction = (expanded ? PENDING_ACTION_EXPANDED : PENDING_ACTION_COLLAPSED) 2579995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes | (animate ? PENDING_ACTION_ANIMATE_ENABLED : 0); 2589995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes requestLayout(); 2599995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 2609995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 261a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 262a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 263a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return p instanceof LayoutParams; 264a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 265a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 266a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 267a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected LayoutParams generateDefaultLayoutParams() { 268a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); 269a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 270a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 271a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 272a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams generateLayoutParams(AttributeSet attrs) { 273a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams(getContext(), attrs); 274a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 275a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 276a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 277a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { 278a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (p instanceof LinearLayout.LayoutParams) { 279a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams((LinearLayout.LayoutParams) p); 280a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else if (p instanceof MarginLayoutParams) { 281a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams((MarginLayoutParams) p); 282a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 283a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return new LayoutParams(p); 284a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 285a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 286a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final boolean hasChildWithInterpolator() { 287a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mHaveChildWithInterpolator; 288a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 289a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 290a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 2916ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes * Returns the scroll range of all children. 292a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 293a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @return the scroll range in px 294a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 2956ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes public final int getTotalScrollRange() { 296a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (mTotalScrollRange != INVALID_SCROLL_RANGE) { 297a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mTotalScrollRange; 298a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 299a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 300a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int range = 0; 301a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 302a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 303a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 304a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int childHeight = ViewCompat.isLaidOut(child) 305a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes ? child.getHeight() 306a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes : child.getMeasuredHeight(); 307a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int flags = lp.mScrollFlags; 308a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 309a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_SCROLL) != 0) { 310a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // We're set to scroll so add the child's height 311b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes range += childHeight + lp.topMargin + lp.bottomMargin; 312a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 313a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 314a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // For a collapsing scroll, we to take the collapsed height into account. 3156ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes // We also break straight away since later views can't scroll beneath 316a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // us 3176ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes range -= ViewCompat.getMinimumHeight(child); 3186ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes break; 319a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 320a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 321a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // As soon as a view doesn't have the scroll flag, we end the range calculation. 322a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // This is because views below can not scroll under a fixed view. 323a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 324a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 325a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 3266ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes final int top = mLastInsets != null ? mLastInsets.getSystemWindowInsetTop() : 0; 3276ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes return mTotalScrollRange = (range - top); 328a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 329a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 330a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final boolean hasScrollableChildren() { 331a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return getTotalScrollRange() != 0; 332a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 333a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 334a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 335a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Return the scroll range when scrolling up from a nested pre-scroll. 336a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 337a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int getUpNestedPreScrollRange() { 33850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return getTotalScrollRange(); 339a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 340a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 341a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 342a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Return the scroll range when scrolling down from a nested pre-scroll. 343a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 344a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int getDownNestedPreScrollRange() { 345a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (mDownPreScrollRange != INVALID_SCROLL_RANGE) { 346a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we already have a valid value, return it 347a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mDownPreScrollRange; 348a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 349a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 350a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int range = 0; 351a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = getChildCount() - 1; i >= 0; i--) { 352a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 353a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 354a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int childHeight = ViewCompat.isLaidOut(child) 355a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes ? child.getHeight() 356a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes : child.getMeasuredHeight(); 357a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int flags = lp.mScrollFlags; 358a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 359a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.FLAG_QUICK_RETURN) == LayoutParams.FLAG_QUICK_RETURN) { 360b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // First take the margin into account 361b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes range += lp.topMargin + lp.bottomMargin; 362a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // The view has the quick return flag combination... 363a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED) != 0) { 364a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If they're set to enter collapsed, use the minimum height 365a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes range += ViewCompat.getMinimumHeight(child); 366a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 367a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Else use the full height 368a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes range += childHeight; 369a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 370a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else if (range > 0) { 371a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we've hit an non-quick return scrollable view, and we've already hit a 372a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // quick return view, return now 373a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 374a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 375a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 376a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mDownPreScrollRange = range; 377a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 378a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 379a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 380a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Return the scroll range when scrolling down from a nested scroll. 381a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 382a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int getDownNestedScrollRange() { 383a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (mDownScrollRange != INVALID_SCROLL_RANGE) { 384a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we already have a valid value, return it 385a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mDownScrollRange; 386a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 387a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 388a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int range = 0; 389c1ce4f6cf4d99d6856c4259bf1bb1cb56f604737Chris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 390a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = getChildAt(i); 391a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 392b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes int childHeight = ViewCompat.isLaidOut(child) 393a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes ? child.getHeight() 394a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes : child.getMeasuredHeight(); 395b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes childHeight += lp.topMargin + lp.bottomMargin; 396a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 397a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int flags = lp.mScrollFlags; 398a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 399a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_SCROLL) != 0) { 400a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // We're set to scroll so add the child's height 401a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes range += childHeight; 402a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 403a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 404a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // For a collapsing exit scroll, we to take the collapsed height into account. 405a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // We also return the range straight away since later views can't scroll 406a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // beneath us 407a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return range - ViewCompat.getMinimumHeight(child); 408a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 409a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 410a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // As soon as a view doesn't have the scroll flag, we end the range calculation. 411a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // This is because views below can not scroll under a fixed view. 412a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes break; 413a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 414a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 415a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mDownScrollRange = range; 416a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 417a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 41850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int getMinimumHeightForVisibleOverlappingContent() { 4196ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes final int topInset = mLastInsets != null ? mLastInsets.getSystemWindowInsetTop() : 0; 42050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int minHeight = ViewCompat.getMinimumHeight(this); 42150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (minHeight != 0) { 42250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // If this layout has a min height, use it (doubled) 4236ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes return (minHeight * 2) + topInset; 42450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 42550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 42650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // Otherwise, we'll use twice the min height of our last child 42750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int childCount = getChildCount(); 42850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return childCount >= 1 4296ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes ? (ViewCompat.getMinimumHeight(getChildAt(childCount - 1)) * 2) + topInset 43050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes : 0; 43150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 43250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 43350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes /** 434631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Set the elevation value to use when this {@link AppBarLayout} should be elevated 435631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * above content. 436631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * <p> 437631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * This method does not do anything itself. A typical use for this method is called from within 438631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * an {@link OnOffsetChangedListener} when the offset has changed in such a way to require an 439631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * elevation change. 440631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 441631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @param elevation the elevation value to use. 442631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * 443631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * @see ViewCompat#setElevation(View, float) 44450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes */ 445631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void setTargetElevation(float elevation) { 446631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mTargetElevation = elevation; 447631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 448631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 449631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes /** 450631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * Returns the elevation value to use when this {@link AppBarLayout} should be elevated 451631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes * above content. 452631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes */ 453631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public float getTargetElevation() { 45450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return mTargetElevation; 45550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 45650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 4579995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes int getPendingAction() { 4589995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes return mPendingAction; 4599995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 4609995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 4619995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes void resetPendingAction() { 4629995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes mPendingAction = PENDING_ACTION_NONE; 4639995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 4649995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 4656ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes private void setWindowInsets(WindowInsetsCompat insets) { 4666ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes // Invalidate the total scroll range... 4676ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes mTotalScrollRange = INVALID_SCROLL_RANGE; 4686ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes mLastInsets = insets; 4696ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes 4706ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes // Now dispatch them to our children 4716ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes for (int i = 0, z = getChildCount(); i < z; i++) { 4726ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes final View child = getChildAt(i); 4736ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes insets = ViewCompat.dispatchApplyWindowInsets(child, insets); 4746ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes if (insets.isConsumed()) { 4756ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes break; 4766ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes } 4776ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes } 4786ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes } 4796ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes 480a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static class LayoutParams extends LinearLayout.LayoutParams { 48150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 48250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes /** @hide */ 48350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @IntDef(flag=true, value={ 48450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes SCROLL_FLAG_SCROLL, 48550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes SCROLL_FLAG_EXIT_UNTIL_COLLAPSED, 48650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes SCROLL_FLAG_ENTER_ALWAYS, 48750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED 48850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes }) 48950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @Retention(RetentionPolicy.SOURCE) 49050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes public @interface ScrollFlags {} 49150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 492a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 493a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * The view will be scroll in direct relation to scroll events. This flag needs to be 494a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * set for any of the other flags to take effect. If any sibling views 495a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * before this one do not have this flag, then this value has no effect. 496a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 497a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_SCROLL = 0x1; 498a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 499a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 500a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * When exiting (scrolling off screen) the view will be scrolled until it is 501a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 'collapsed'. The collapsed height is defined by the view's minimum height. 502a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 503a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see ViewCompat#getMinimumHeight(View) 504a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see View#setMinimumHeight(int) 505a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 506a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_EXIT_UNTIL_COLLAPSED = 0x2; 507a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 508a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 509a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * When entering (scrolling on screen) the view will scroll on any downwards 510a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * scroll event, regardless of whether the scrolling view is also scrolling. This 511a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * is commonly referred to as the 'quick return' pattern. 512a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 513a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_ENTER_ALWAYS = 0x4; 514a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 515a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 516a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * An additional flag for 'enterAlways' which modifies the returning view to 517a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * only initially scroll back to it's collapsed height. Once the scrolling view has 518a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * reached the end of it's scroll range, the remainder of this view will be scrolled 519a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * into view. The collapsed height is defined by the view's minimum height. 520a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 521a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see ViewCompat#getMinimumHeight(View) 522a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see View#setMinimumHeight(int) 523a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 524a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static final int SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED = 0x8; 525a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 526a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 527a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Internal flag which allows quick checking of 'quick return' 528a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 529a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes static final int FLAG_QUICK_RETURN = SCROLL_FLAG_SCROLL | SCROLL_FLAG_ENTER_ALWAYS; 530a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 531a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int mScrollFlags = SCROLL_FLAG_SCROLL; 532a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes Interpolator mScrollInterpolator; 533a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 534a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(Context c, AttributeSet attrs) { 535a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(c, attrs); 536a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.AppBarLayout_LayoutParams); 537a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollFlags = a.getInt(R.styleable.AppBarLayout_LayoutParams_layout_scrollFlags, 0); 538a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (a.hasValue(R.styleable.AppBarLayout_LayoutParams_layout_scrollInterpolator)) { 539a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int resId = a.getResourceId( 540a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes R.styleable.AppBarLayout_LayoutParams_layout_scrollInterpolator, 0); 541a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollInterpolator = android.view.animation.AnimationUtils.loadInterpolator( 542a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes c, resId); 543a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 544a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes a.recycle(); 545a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 546a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 547a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(int width, int height) { 548a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(width, height); 549a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 550a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 551a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(int width, int height, float weight) { 552a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(width, height, weight); 553a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 554a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 555a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(ViewGroup.LayoutParams p) { 556a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(p); 557a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 558a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 559a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(MarginLayoutParams source) { 560a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(source); 561a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 562a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 563a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(LinearLayout.LayoutParams source) { 564a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(source); 565a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 566a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 567a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public LayoutParams(LayoutParams source) { 568a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(source); 569a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollFlags = source.mScrollFlags; 570a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollInterpolator = source.mScrollInterpolator; 571a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 572a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 573a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 574a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Set the scrolling flags. 575a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 576a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param flags bitwise int of {@link #SCROLL_FLAG_SCROLL}, 577a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link #SCROLL_FLAG_EXIT_UNTIL_COLLAPSED}, {@link #SCROLL_FLAG_ENTER_ALWAYS} 578a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * and {@link #SCROLL_FLAG_ENTER_ALWAYS_COLLAPSED}. 579a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 580a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #getScrollFlags() 581a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 582149689d3a0b4165577470d7152112674d1d7f87cChris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_LayoutParams_layout_scrollFlags 583a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 58450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes public void setScrollFlags(@ScrollFlags int flags) { 585a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollFlags = flags; 586a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 587a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 588a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 589a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Returns the scrolling flags. 590a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 591a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #setScrollFlags(int) 592a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 593149689d3a0b4165577470d7152112674d1d7f87cChris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_LayoutParams_layout_scrollFlags 594a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 59550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @ScrollFlags 596a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public int getScrollFlags() { 597a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mScrollFlags; 598a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 599a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 600a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 601a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Set the interpolator to when scrolling the view associated with this 602a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link LayoutParams}. 603a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 604a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param interpolator the interpolator to use, or null to use normal 1-to-1 scrolling. 605a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 606149689d3a0b4165577470d7152112674d1d7f87cChris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_LayoutParams_layout_scrollInterpolator 607a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #getScrollInterpolator() 608a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 609a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void setScrollInterpolator(Interpolator interpolator) { 610a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mScrollInterpolator = interpolator; 611a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 612a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 613a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 614a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Returns the {@link Interpolator} being used for scrolling the view associated with this 615a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link LayoutParams}. Null indicates 'normal' 1-to-1 scrolling. 616a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 617149689d3a0b4165577470d7152112674d1d7f87cChris Banes * @attr ref android.support.design.R.styleable#AppBarLayout_LayoutParams_layout_scrollInterpolator 618a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @see #setScrollInterpolator(Interpolator) 619a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 620a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public Interpolator getScrollInterpolator() { 621a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mScrollInterpolator; 622a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 623a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 624a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 625a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 626a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * The default {@link Behavior} for {@link AppBarLayout}. Implements the necessary nested 627a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * scroll handling with offsetting. 628a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 629a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static class Behavior extends ViewOffsetBehavior<AppBarLayout> { 630d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private static final int INVALID_POINTER = -1; 631e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private static final int INVALID_POSITION = -1; 632e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 633e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private int mOffsetDelta; 634a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 63550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes private boolean mSkipNestedPreScroll; 636631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private Runnable mFlingRunnable; 637631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private ScrollerCompat mScroller; 638631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 639631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private ValueAnimatorCompat mAnimator; 64050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 641e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private int mOffsetToChildIndexOnLayout = INVALID_POSITION; 642e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private boolean mOffsetToChildIndexOnLayoutIsMinHeight; 643e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes private float mOffsetToChildIndexOnLayoutPerc; 644e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 645d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private boolean mIsBeingDragged; 646d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private int mActivePointerId = INVALID_POINTER; 647d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private int mLastMotionY; 648d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private int mTouchSlop = -1; 649d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 650d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private WeakReference<View> mLastNestedScrollingChildRef; 651d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 652a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public Behavior() {} 653a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 654a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public Behavior(Context context, AttributeSet attrs) { 655a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(context, attrs); 656a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 657a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 658a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 659ab809dd75ef2f73b312038f2c10473cfa5885a58Chris Banes public boolean onStartNestedScroll(CoordinatorLayout parent, AppBarLayout child, 660a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View directTargetChild, View target, int nestedScrollAxes) { 661f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes // Return true if we're nested scrolling vertically, and we have scrollable children 662f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes // and the scrolling view is big enough to scroll 663631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes final boolean started = (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0 664f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes && child.hasScrollableChildren() 665ab809dd75ef2f73b312038f2c10473cfa5885a58Chris Banes && parent.getHeight() - directTargetChild.getHeight() <= child.getHeight(); 666631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 667631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (started && mAnimator != null) { 668631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // Cancel any offset animation 669631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mAnimator.cancel(); 670631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 671631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 672d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes // A new nested scroll has started so clear out the previous ref 673d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastNestedScrollingChildRef = null; 674d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 675631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return started; 676a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 677a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 678a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 679a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, 680a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View target, int dx, int dy, int[] consumed) { 68150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (dy != 0 && !mSkipNestedPreScroll) { 68250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes int min, max; 68350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (dy < 0) { 68450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // We're scrolling down 68550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes min = -child.getTotalScrollRange(); 68650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes max = min + child.getDownNestedPreScrollRange(); 68750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } else { 68850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // We're scrolling up 68950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes min = -child.getUpNestedPreScrollRange(); 69050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes max = 0; 69150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 69250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes consumed[1] = scroll(coordinatorLayout, child, dy, min, max); 693a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 694a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 695a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 696a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 697a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void onNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, 698a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View target, int dxConsumed, int dyConsumed, 699a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int dxUnconsumed, int dyUnconsumed) { 70050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (dyUnconsumed < 0) { 70150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // If the scrolling view is scrolling down but not consuming, it's probably be at 70250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // the top of it's content 70350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes scroll(coordinatorLayout, child, dyUnconsumed, 70450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes -child.getDownNestedScrollRange(), 0); 70550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // Set the expanding flag so that onNestedPreScroll doesn't handle any events 70650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes mSkipNestedPreScroll = true; 70750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } else { 70850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // As we're no longer handling nested scrolls, reset the skip flag 70950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes mSkipNestedPreScroll = false; 710a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 71150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 712a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 71350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @Override 71450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, 71550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes View target) { 71650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // Reset the skip flag 71750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes mSkipNestedPreScroll = false; 718d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes // Keep a reference to the previous nested scrolling child 719d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastNestedScrollingChildRef = new WeakReference<>(target); 720d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 721d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 722d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes @Override 723d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes public boolean onInterceptTouchEvent(CoordinatorLayout parent, AppBarLayout child, 724d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes MotionEvent ev) { 725d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (mTouchSlop < 0) { 726d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mTouchSlop = ViewConfiguration.get(parent.getContext()).getScaledTouchSlop(); 727d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 728d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 729d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int action = ev.getAction(); 730d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 731d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes // Shortcut since we're being dragged 732d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (action == MotionEvent.ACTION_MOVE && mIsBeingDragged) { 733d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes return true; 734d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 735d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 736d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes switch (MotionEventCompat.getActionMasked(ev)) { 737d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_MOVE: { 738d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int activePointerId = mActivePointerId; 739d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (activePointerId == INVALID_POINTER) { 740d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes // If we don't have a valid id, the touch down wasn't on content. 741d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 742d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 743d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int pointerIndex = MotionEventCompat.findPointerIndex(ev, activePointerId); 744d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (pointerIndex == -1) { 745d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 746d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 747d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 748d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int y = (int) MotionEventCompat.getY(ev, pointerIndex); 749d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int yDiff = Math.abs(y - mLastMotionY); 750d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (yDiff > mTouchSlop) { 751d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mIsBeingDragged = true; 752d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastMotionY = y; 753d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 754d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 755d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 756d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 757d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_DOWN: { 758d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mIsBeingDragged = false; 759d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int x = (int) ev.getX(); 760d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int y = (int) ev.getY(); 761d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (parent.isPointInChildBounds(child, x, y) && canDragAppBarLayout()) { 762d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastMotionY = y; 763d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mActivePointerId = MotionEventCompat.getPointerId(ev, 0); 764d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 765d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 766d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 767d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 768d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_CANCEL: 769d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_UP: 770d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mIsBeingDragged = false; 771d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mActivePointerId = INVALID_POINTER; 772d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 773d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 774d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 775d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes return mIsBeingDragged; 776d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 777d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 778d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes @Override 779d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes public boolean onTouchEvent(CoordinatorLayout parent, AppBarLayout child, MotionEvent ev) { 780d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (mTouchSlop < 0) { 781d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mTouchSlop = ViewConfiguration.get(parent.getContext()).getScaledTouchSlop(); 782d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 783d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 784d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes int x = (int) ev.getX(); 785d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes int y = (int) ev.getY(); 786d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 787d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes switch (MotionEventCompat.getActionMasked(ev)) { 788d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_DOWN: 789d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (parent.isPointInChildBounds(child, x, y) && canDragAppBarLayout()) { 790d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastMotionY = y; 791d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mActivePointerId = MotionEventCompat.getPointerId(ev, 0); 792d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } else { 793d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes return false; 794d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 795d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 796d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_MOVE: 797d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, 798d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mActivePointerId); 799d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (activePointerIndex == -1) { 800d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes return false; 801d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 802d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 803d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes y = (int) MotionEventCompat.getY(ev, activePointerIndex); 804d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 805d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes int dy = mLastMotionY - y; 806d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (!mIsBeingDragged && Math.abs(dy) > mTouchSlop) { 807d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mIsBeingDragged = true; 808d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (dy > 0) { 809d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes dy -= mTouchSlop; 810d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } else { 811d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes dy += mTouchSlop; 812d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 813d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 814d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 815d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (mIsBeingDragged) { 816d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mLastMotionY = y; 817d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes // We're being dragged so scroll the ABL 818d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes scroll(parent, child, dy, -child.getDownNestedScrollRange(), 0); 819d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 820d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 821d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_UP: 822d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes case MotionEvent.ACTION_CANCEL: 823d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mIsBeingDragged = false; 824d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes mActivePointerId = INVALID_POINTER; 825d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes break; 826d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 827d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 828d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes return true; 82950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 83050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 83150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes @Override 832631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public boolean onNestedFling(final CoordinatorLayout coordinatorLayout, 833631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes final AppBarLayout child, View target, float velocityX, float velocityY, 834631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes boolean consumed) { 835631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (!consumed) { 836631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // It has been consumed so let's fling ourselves 837631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return fling(coordinatorLayout, child, -child.getTotalScrollRange(), 0, -velocityY); 838631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } else { 839631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // If we're scrolling up and the child also consumed the fling. We'll fake scroll 840631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // upto our 'collapsed' offset 841631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes int targetScroll; 842631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (velocityY < 0) { 843631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // We're scrolling down 844631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes targetScroll = -child.getTotalScrollRange() 845631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes + child.getDownNestedPreScrollRange(); 846631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 847631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (getTopBottomOffsetForScrollingSibling() > targetScroll) { 848631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // If we're currently expanded more than the target scroll, we'll return false 849631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // now. This is so that we don't 'scroll' the wrong way. 850631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return false; 851631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 852631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } else { 853631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // We're scrolling up 854631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes targetScroll = -child.getUpNestedPreScrollRange(); 855631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 856631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (getTopBottomOffsetForScrollingSibling() < targetScroll) { 857631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // If we're currently expanded less than the target scroll, we'll return 858631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // false now. This is so that we don't 'scroll' the wrong way. 859631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return false; 860631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 861631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 862631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 863e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes if (getTopBottomOffsetForScrollingSibling() != targetScroll) { 864631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes animateOffsetTo(coordinatorLayout, child, targetScroll); 865631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return true; 866631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 867631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 868631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 869631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return false; 870631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 871631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 872631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private void animateOffsetTo(final CoordinatorLayout coordinatorLayout, 873631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes final AppBarLayout child, int offset) { 874631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (mAnimator == null) { 875631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mAnimator = ViewUtils.createAnimator(); 876631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mAnimator.setInterpolator(AnimationUtils.DECELERATE_INTERPOLATOR); 877631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mAnimator.setUpdateListener(new ValueAnimatorCompat.AnimatorUpdateListener() { 878631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes @Override 879631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void onAnimationUpdate(ValueAnimatorCompat animator) { 880631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes setAppBarTopBottomOffset(coordinatorLayout, child, 881631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes animator.getAnimatedIntValue()); 882631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 883631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes }); 884631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } else { 885631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mAnimator.cancel(); 886631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 887631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 888631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mAnimator.setIntValues(getTopBottomOffsetForScrollingSibling(), offset); 889631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mAnimator.start(); 890631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 891631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 892631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private boolean fling(CoordinatorLayout coordinatorLayout, AppBarLayout layout, int minOffset, 893631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes int maxOffset, float velocityY) { 894631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (mFlingRunnable != null) { 895631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes layout.removeCallbacks(mFlingRunnable); 896631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 897631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 898631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (mScroller == null) { 899631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mScroller = ScrollerCompat.create(layout.getContext()); 900631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 901631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 902631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mScroller.fling( 903e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 0, getTopBottomOffsetForScrollingSibling(), // curr 904631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 0, Math.round(velocityY), // velocity. 905631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 0, 0, // x 906631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes minOffset, maxOffset); // y 907631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 908631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (mScroller.computeScrollOffset()) { 909631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mFlingRunnable = new FlingRunnable(coordinatorLayout, layout); 910631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes ViewCompat.postOnAnimation(layout, mFlingRunnable); 911631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return true; 912631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } else { 913631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mFlingRunnable = null; 914631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return false; 915631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 916631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 917631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 918631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private class FlingRunnable implements Runnable { 919631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private final CoordinatorLayout mParent; 920631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private final AppBarLayout mLayout; 921631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 922631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes FlingRunnable(CoordinatorLayout parent, AppBarLayout layout) { 923631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mParent = parent; 924631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes mLayout = layout; 925631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 926631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 927631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes @Override 928631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes public void run() { 929631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (mLayout != null && mScroller != null && mScroller.computeScrollOffset()) { 930631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes setAppBarTopBottomOffset(mParent, mLayout, mScroller.getCurrY()); 931631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 932631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // Post ourselves so that we run on the next animation 933631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes ViewCompat.postOnAnimation(mLayout, this); 934631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 935631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 936631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 937631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 938631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes @Override 9399995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes public boolean onLayoutChild(CoordinatorLayout parent, AppBarLayout abl, 94050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes int layoutDirection) { 9419995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes boolean handled = super.onLayoutChild(parent, abl, layoutDirection); 9429995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes 9439995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes final int pendingAction = abl.getPendingAction(); 9449995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (pendingAction != PENDING_ACTION_NONE) { 9459995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes final boolean animate = (pendingAction & PENDING_ACTION_ANIMATE_ENABLED) != 0; 9469995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if ((pendingAction & PENDING_ACTION_COLLAPSED) != 0) { 9479995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes final int offset = -abl.getUpNestedPreScrollRange(); 9489995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (animate) { 9499995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes animateOffsetTo(parent, abl, offset); 9509995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else { 9519995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes setAppBarTopBottomOffset(parent, abl, offset); 9529995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 9539995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else if ((pendingAction & PENDING_ACTION_EXPANDED) != 0) { 9549995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes if (animate) { 9559995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes animateOffsetTo(parent, abl, 0); 9569995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else { 9579995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes setAppBarTopBottomOffset(parent, abl, 0); 9589995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 9599995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } 9609995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes // Finally reset the pending state 9619995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes abl.resetPendingAction(); 9629995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes } else if (mOffsetToChildIndexOnLayout >= 0) { 9639995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes View child = abl.getChildAt(mOffsetToChildIndexOnLayout); 964e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes int offset = -child.getBottom(); 965e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes if (mOffsetToChildIndexOnLayoutIsMinHeight) { 966e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes offset += ViewCompat.getMinimumHeight(child); 967e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } else { 968e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes offset += Math.round(child.getHeight() * mOffsetToChildIndexOnLayoutPerc); 969e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 970e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes setTopAndBottomOffset(offset); 971e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetToChildIndexOnLayout = INVALID_POSITION; 972e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 97350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 97450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // Make sure we update the elevation 9759995f7bdb02dbe16155661545fd64046ad3d56c2Chris Banes dispatchOffsetUpdates(abl); 97650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 97750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return handled; 978a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 979a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 980a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int scroll(CoordinatorLayout coordinatorLayout, AppBarLayout appBarLayout, 98150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes int dy, int minOffset, int maxOffset) { 982a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return setAppBarTopBottomOffset(coordinatorLayout, appBarLayout, 983e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes getTopBottomOffsetForScrollingSibling() - dy, minOffset, maxOffset); 984a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 985a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 986d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes private boolean canDragAppBarLayout() { 987d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes if (mLastNestedScrollingChildRef != null) { 988d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes final View view = mLastNestedScrollingChildRef.get(); 989d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes return view != null && view.isShown() && !ViewCompat.canScrollVertically(view, -1); 990d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 991d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes return false; 992d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes } 993d4c72f08279df548fbc4d556fe1a8b3500fafdbcChris Banes 994631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes final int setAppBarTopBottomOffset(CoordinatorLayout coordinatorLayout, 995631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes AppBarLayout appBarLayout, int newOffset) { 996631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes return setAppBarTopBottomOffset(coordinatorLayout, appBarLayout, newOffset, 997631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes Integer.MIN_VALUE, Integer.MAX_VALUE); 998631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes } 999631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 1000631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes final int setAppBarTopBottomOffset(CoordinatorLayout coordinatorLayout, 100150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes AppBarLayout appBarLayout, int newOffset, int minOffset, int maxOffset) { 1002e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int curOffset = getTopBottomOffsetForScrollingSibling(); 1003a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int consumed = 0; 1004a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1005631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (minOffset != 0 && curOffset >= minOffset && curOffset <= maxOffset) { 1006631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // If we have some scrolling range, and we're currently within the min and max 1007631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // offsets, calculate a new offset 100850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes newOffset = MathUtils.constrain(newOffset, minOffset, maxOffset); 1009a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1010a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (curOffset != newOffset) { 1011e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int interpolatedOffset = appBarLayout.hasChildWithInterpolator() 1012e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes ? interpolateOffset(appBarLayout, newOffset) 1013e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes : newOffset; 1014e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1015e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes boolean offsetChanged = setTopAndBottomOffset(interpolatedOffset); 1016631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes 1017a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Update how much dy we have consumed 1018a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes consumed = curOffset - newOffset; 1019a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Update the stored sibling offset 1020e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetDelta = newOffset - interpolatedOffset; 1021a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1022a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (!offsetChanged && appBarLayout.hasChildWithInterpolator()) { 1023a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If the offset hasn't changed and we're using an interpolated scroll 1024a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // then we need to keep any dependent views updated. CoL will do this for 1025a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // us when we move, but we need to do it manually when we don't (as an 1026a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // interpolated scroll may finish early). 1027a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes coordinatorLayout.dispatchDependentViewsChanged(appBarLayout); 1028a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1029a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1030631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // Dispatch the updates to any listeners 1031631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes dispatchOffsetUpdates(appBarLayout); 1032a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1033a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1034a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1035a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return consumed; 1036a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1037a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1038631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes private void dispatchOffsetUpdates(AppBarLayout layout) { 10396f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes final List<OnOffsetChangedListener> listeners = layout.mListeners; 104050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 1041631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // Iterate backwards through the list so that most recently added listeners 1042631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes // get the first chance to decide 1043631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes for (int i = 0, z = listeners.size(); i < z; i++) { 10446f730c0acfb10a929172ea2981a1aded0e39f5c7Chris Banes final OnOffsetChangedListener listener = listeners.get(i); 1045631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes if (listener != null) { 1046631f64ec9c6255f38a7f746d7949b6a537c1180fChris Banes listener.onOffsetChanged(layout, getTopAndBottomOffset()); 1047a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1048a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1049a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1050a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1051a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int interpolateOffset(AppBarLayout layout, final int offset) { 1052a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int absOffset = Math.abs(offset); 1053a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1054a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = layout.getChildCount(); i < z; i++) { 1055a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final View child = layout.getChildAt(i); 1056a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final AppBarLayout.LayoutParams childLp = (LayoutParams) child.getLayoutParams(); 105750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final Interpolator interpolator = childLp.getScrollInterpolator(); 1058a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 105950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (absOffset >= child.getTop() && absOffset <= child.getBottom()) { 1060a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (interpolator != null) { 106150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes int childScrollableHeight = 0; 106250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int flags = childLp.getScrollFlags(); 106350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_SCROLL) != 0) { 1064b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // We're set to scroll so add the child's height plus margin 1065b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes childScrollableHeight += child.getHeight() + childLp.topMargin 1066b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes + childLp.bottomMargin; 1067b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes 106850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if ((flags & LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED) != 0) { 1069b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // For a collapsing scroll, we to take the collapsed height 1070b263b91ba75dc1a7855186e8b0e9cf75d46a6b8dChris Banes // into account. 107150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes childScrollableHeight -= ViewCompat.getMinimumHeight(child); 107250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 107350dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 107450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 107550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes if (childScrollableHeight > 0) { 107650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int offsetForView = absOffset - child.getTop(); 107750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes final int interpolatedDiff = Math.round(childScrollableHeight * 107850dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes interpolator.getInterpolation( 107950dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes offsetForView / (float) childScrollableHeight)); 108050dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 108150dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes return Integer.signum(offset) * (child.getTop() + interpolatedDiff); 108250dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes } 1083a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 108450dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes 108550dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // If we get to here then the view on the offset isn't suitable for interpolated 108650dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes // scrolling. So break out of the loop 108750dfc33a565c4aefe6d5e844c93aa24a74cb80b3Chris Banes break; 1088a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1089a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1090a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1091a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return offset; 1092a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1093a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1094a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int getTopBottomOffsetForScrollingSibling() { 1095e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return getTopAndBottomOffset() + mOffsetDelta; 1096e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1097e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1098e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1099e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public Parcelable onSaveInstanceState(CoordinatorLayout parent, AppBarLayout appBarLayout) { 1100e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final Parcelable superState = super.onSaveInstanceState(parent, appBarLayout); 1101e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int offset = getTopAndBottomOffset(); 1102e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1103e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes // Try and find the first visible child... 1104e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes for (int i = 0, count = appBarLayout.getChildCount(); i < count; i++) { 1105e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes View child = appBarLayout.getChildAt(i); 1106e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final int visBottom = child.getBottom() + offset; 1107e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1108e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes if (child.getTop() + offset <= 0 && visBottom >= 0) { 1109e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final SavedState ss = new SavedState(superState); 1110e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes ss.firstVisibleChildIndex = i; 1111e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes ss.firstVisibileChildAtMinimumHeight = 1112e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes visBottom == ViewCompat.getMinimumHeight(child); 1113e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes ss.firstVisibileChildPercentageShown = visBottom / (float) child.getHeight(); 1114e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return ss; 1115e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1116e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1117e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1118e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes // Else we'll just return the super state 1119e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return superState; 1120e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1121e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1122e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1123e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public void onRestoreInstanceState(CoordinatorLayout parent, AppBarLayout appBarLayout, 1124e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes Parcelable state) { 1125e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes if (state instanceof SavedState) { 1126e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes final SavedState ss = (SavedState) state; 1127e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super.onRestoreInstanceState(parent, appBarLayout, ss.getSuperState()); 1128e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetToChildIndexOnLayout = ss.firstVisibleChildIndex; 1129e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetToChildIndexOnLayoutPerc = ss.firstVisibileChildPercentageShown; 1130e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetToChildIndexOnLayoutIsMinHeight = ss.firstVisibileChildAtMinimumHeight; 1131e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } else { 1132e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super.onRestoreInstanceState(parent, appBarLayout, state); 1133e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes mOffsetToChildIndexOnLayout = INVALID_POSITION; 1134e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1135e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1136e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1137e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes protected static class SavedState extends View.BaseSavedState { 1138e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes int firstVisibleChildIndex; 1139e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes float firstVisibileChildPercentageShown; 1140e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes boolean firstVisibileChildAtMinimumHeight; 1141e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1142e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public SavedState(Parcel source) { 1143e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super(source); 1144e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes firstVisibleChildIndex = source.readInt(); 1145e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes firstVisibileChildPercentageShown = source.readFloat(); 1146e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes firstVisibileChildAtMinimumHeight = source.readByte() != 0; 1147e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1148e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1149e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public SavedState(Parcelable superState) { 1150e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super(superState); 1151e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1152e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1153e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1154e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public void writeToParcel(Parcel dest, int flags) { 1155e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes super.writeToParcel(dest, flags); 1156e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes dest.writeInt(firstVisibleChildIndex); 1157e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes dest.writeFloat(firstVisibileChildPercentageShown); 1158e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes dest.writeByte((byte) (firstVisibileChildAtMinimumHeight ? 1 : 0)); 1159e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1160e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1161e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public static final Parcelable.Creator<SavedState> CREATOR = 1162e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes new Parcelable.Creator<SavedState>() { 1163e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1164e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public SavedState createFromParcel(Parcel source) { 1165e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return new SavedState(source); 1166e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1167e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes 1168e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes @Override 1169e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes public SavedState[] newArray(int size) { 1170e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes return new SavedState[size]; 1171e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes } 1172e52e16988e2500e20052ddd70920f950f4eb4f79Chris Banes }; 1173a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1174a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1175a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1176a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 1177a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Behavior which should be used by {@link View}s which can scroll vertically and support 1178a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * nested scrolling to automatically scroll any {@link AppBarLayout} siblings. 1179a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 1180a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public static class ScrollingViewBehavior extends ViewOffsetBehavior<View> { 1181a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private int mOverlayTop; 1182a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1183a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public ScrollingViewBehavior() {} 1184a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1185a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public ScrollingViewBehavior(Context context, AttributeSet attrs) { 1186a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes super(context, attrs); 1187a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1188a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes TypedArray a = context.obtainStyledAttributes(attrs, 1189a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes R.styleable.ScrollingViewBehavior_Params); 1190a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mOverlayTop = a.getDimensionPixelSize( 1191a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes R.styleable.ScrollingViewBehavior_Params_behavior_overlapTop, 0); 1192a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes a.recycle(); 1193a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1194a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1195a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 1196a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public boolean layoutDependsOn(CoordinatorLayout parent, View child, View dependency) { 1197a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // We depend on any AppBarLayouts 1198a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return dependency instanceof AppBarLayout; 1199a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1200a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1201a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 1202a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public boolean onMeasureChild(CoordinatorLayout parent, View child, 1203a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int parentWidthMeasureSpec, int widthUsed, 1204a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes int parentHeightMeasureSpec, int heightUsed) { 1205d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes final int childLpHeight = child.getLayoutParams().height; 1206d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes if (childLpHeight == LayoutParams.MATCH_PARENT 1207d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes || childLpHeight == LayoutParams.WRAP_CONTENT) { 1208d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes // If the child's height is set to match_parent/wrap_content then measure it 1209d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes // with the maximum visible height 1210a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1211a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final List<View> dependencies = parent.getDependencies(child); 1212a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (dependencies.isEmpty()) { 1213a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we don't have any dependencies, return false 1214a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return false; 1215a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1216a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1217a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final AppBarLayout appBar = findFirstAppBarLayout(dependencies); 12186ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes if (appBar != null && ViewCompat.isLaidOut(appBar)) { 12196ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes if (ViewCompat.getFitsSystemWindows(appBar)) { 12206ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes // If the AppBarLayout is fitting system windows then we need to also, 12216ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes // otherwise we'll get CoL's compatible layout functionality 12226ba61c5c79fe025036593c9daf79cb65299bb0b6Chris Banes ViewCompat.setFitsSystemWindows(child, true); 1223a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1224a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 122555f3d29c12610da3574c4f488fbc3a1c7ca790f1Chris Banes int availableHeight = MeasureSpec.getSize(parentHeightMeasureSpec); 122655f3d29c12610da3574c4f488fbc3a1c7ca790f1Chris Banes if (availableHeight == 0) { 122755f3d29c12610da3574c4f488fbc3a1c7ca790f1Chris Banes // If the measure spec doesn't specify a size, use the current height 122855f3d29c12610da3574c4f488fbc3a1c7ca790f1Chris Banes availableHeight = parent.getHeight(); 122955f3d29c12610da3574c4f488fbc3a1c7ca790f1Chris Banes } 123055f3d29c12610da3574c4f488fbc3a1c7ca790f1Chris Banes final int height = availableHeight - appBar.getMeasuredHeight() 1231f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes + appBar.getTotalScrollRange(); 1232a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, 1233d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes childLpHeight == LayoutParams.MATCH_PARENT 1234d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes ? MeasureSpec.EXACTLY 1235d6c56d929f7975eb6d80116e915ff5515a294c41Chris Banes : MeasureSpec.AT_MOST); 1236a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1237a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Now measure the scrolling child with the correct height 1238a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes parent.onMeasureChild(child, parentWidthMeasureSpec, 1239a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes widthUsed, heightMeasureSpec, heightUsed); 1240a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1241a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return true; 1242a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1243a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1244a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return false; 1245a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1246a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1247a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes @Override 1248a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public boolean onDependentViewChanged(CoordinatorLayout parent, View child, 1249a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View dependency) { 1250a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final CoordinatorLayout.Behavior behavior = 1251a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes ((CoordinatorLayout.LayoutParams) dependency.getLayoutParams()).getBehavior(); 1252a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (behavior instanceof Behavior) { 1253a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // Offset the child so that it is below the app-bar (with any overlap) 1254a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1255a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int appBarOffset = ((Behavior) behavior) 1256a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes .getTopBottomOffsetForScrollingSibling(); 1257a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int expandedMax = dependency.getHeight() - mOverlayTop; 1258a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int collapsedMin = parent.getHeight() - child.getHeight(); 1259a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1260a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (mOverlayTop != 0 && dependency instanceof AppBarLayout) { 1261a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // If we have an overlap top, and the dependency is an AppBarLayout, we control 1262a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // the offset ourselves based on the appbar's scroll progress. This is so that 1263a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes // the scroll happens sequentially rather than linearly 1264a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes final int scrollRange = ((AppBarLayout) dependency).getTotalScrollRange(); 1265a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes setTopAndBottomOffset(AnimationUtils.lerp(expandedMax, collapsedMin, 1266a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes Math.abs(appBarOffset) / (float) scrollRange)); 1267a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } else { 1268f57cd2fd5059c43d77bdfec57edfd5a217533103Chris Banes setTopAndBottomOffset(dependency.getHeight() - mOverlayTop + appBarOffset); 1269a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1270a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1271a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return false; 1272a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1273a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1274a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 1275a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Set the distance that this view should overlap any {@link AppBarLayout}. 1276a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 1277a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param overlayTop the distance in px 1278a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 1279a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public void setOverlayTop(int overlayTop) { 1280a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes mOverlayTop = overlayTop; 1281a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1282a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1283a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 1284a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Returns the distance that this view should overlap any {@link AppBarLayout}. 1285a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 1286a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes public int getOverlayTop() { 1287a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return mOverlayTop; 1288a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1289a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 1290a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes private static AppBarLayout findFirstAppBarLayout(List<View> views) { 1291a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes for (int i = 0, z = views.size(); i < z; i++) { 1292a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes View view = views.get(i); 1293a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes if (view instanceof AppBarLayout) { 1294a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return (AppBarLayout) view; 1295a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1296a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1297a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes return null; 1298a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1299a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 1300a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes} 1301