BottomSheetBehavior.java revision bfd8da2625c8198bd7d6884acb9f4b73ff35a2af
1452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki/* 2452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Copyright (C) 2015 The Android Open Source Project 3452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 4452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Licensed under the Apache License, Version 2.0 (the "License"); 5452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * you may not use this file except in compliance with the License. 6452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * You may obtain a copy of the License at 7452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 8452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * http://www.apache.org/licenses/LICENSE-2.0 9452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 10452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Unless required by applicable law or agreed to in writing, software 11452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * distributed under the License is distributed on an "AS IS" BASIS, 12452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * See the License for the specific language governing permissions and 14452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * limitations under the License. 15452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 16452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 17452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakipackage android.support.design.widget; 18452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 19452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.content.Context; 20452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.content.res.TypedArray; 21452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.os.Parcel; 22452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.os.Parcelable; 23452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.annotation.IntDef; 24dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Arakiimport android.support.annotation.NonNull; 25452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.design.R; 2605f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banesimport android.support.v4.os.ParcelableCompat; 2705f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banesimport android.support.v4.os.ParcelableCompatCreatorCallbacks; 2805f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banesimport android.support.v4.view.AbsSavedState; 29452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.view.MotionEventCompat; 309aec720809a123c6193304730acf8b55d6ce5a7aYuichi Arakiimport android.support.v4.view.NestedScrollingChild; 31e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.support.v4.view.VelocityTrackerCompat; 32452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.view.ViewCompat; 33452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.widget.ViewDragHelper; 34452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.util.AttributeSet; 3501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Arakiimport android.util.TypedValue; 36452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.MotionEvent; 37e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.VelocityTracker; 38452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.View; 39e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.ViewConfiguration; 40452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.ViewGroup; 41bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Arakiimport android.view.ViewParent; 42452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 43452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.Retention; 44452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.RetentionPolicy; 45452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.ref.WeakReference; 46452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 47452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 48452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki/** 49452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * An interaction behavior plugin for a child view of {@link CoordinatorLayout} to make it work as 50452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * a bottom sheet. 51452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 52452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakipublic class BottomSheetBehavior<V extends View> extends CoordinatorLayout.Behavior<V> { 53452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 54452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 554df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Callback for monitoring events about bottom sheets. 56f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 574df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public abstract static class BottomSheetCallback { 58f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 59f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 60f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet changes its state. 61f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 62dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 63dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param newState The new state. This will be one of {@link #STATE_DRAGGING}, 64dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_SETTLING}, {@link #STATE_EXPANDED}, 65dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_COLLAPSED}, or {@link #STATE_HIDDEN}. 66f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 67dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onStateChanged(@NonNull View bottomSheet, @State int newState); 68f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 69f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 70f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet is being dragged. 71f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 72dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 7391177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * @param slideOffset The new offset of this bottom sheet within [-1,1] range. Offset 7491177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * increases as this bottom sheet is moving upward. From 0 to 1 the sheet 7591177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * is between collapsed and expanded states and from -1 to 0 it is 7691177092bb7b2a0586f194de4d207349cdfabf30Aurimas Liutikas * between hidden and collapsed states. 77f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 78dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onSlide(@NonNull View bottomSheet, float slideOffset); 79f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 80f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 81f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 82452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is dragging. 83452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 84452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_DRAGGING = 1; 85452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 86452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 87452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is settling. 88452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 89452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_SETTLING = 2; 90452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 91452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 92452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is expanded. 93452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 94452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_EXPANDED = 3; 95452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 96452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 97452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is collapsed. 98452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 99452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_COLLAPSED = 4; 100452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 101f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 102f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * The bottom sheet is hidden. 103f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 104f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public static final int STATE_HIDDEN = 5; 105f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 106452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** @hide */ 107f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @IntDef({STATE_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, STATE_SETTLING, STATE_HIDDEN}) 108452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Retention(RetentionPolicy.SOURCE) 109452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public @interface State {} 110452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 11101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki /** 11201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki * Peek at the 16:9 ratio keyline of its parent. 11301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki */ 11401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki public static final int PEEK_HEIGHT_AUTO = -1; 11501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki 116f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_THRESHOLD = 0.5f; 117f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 118f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_FRICTION = 0.1f; 119f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 120e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float mMaximumVelocity; 121f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 122452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mPeekHeight; 123452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 12401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki private boolean mPeekHeightAuto; 12501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki 12601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki private int mPeekHeightMin; 12701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki 128452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMinOffset; 129452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 130452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMaxOffset; 131452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 132f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean mHideable; 133f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 134362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki private boolean mSkipCollapsed; 135362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 136452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 137452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mState = STATE_COLLAPSED; 138452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 139452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private ViewDragHelper mViewDragHelper; 140452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 141452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private boolean mIgnoreEvents; 142452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 143e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private int mLastNestedScrollDy; 144e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 14549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki private boolean mNestedScrolled; 14649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki 147452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mParentHeight; 148452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 149452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private WeakReference<V> mViewRef; 150452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 1519aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private WeakReference<View> mNestedScrollingChildRef; 152f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1539aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private BottomSheetCallback mCallback; 154f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 155e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private VelocityTracker mVelocityTracker; 156e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 157e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private int mActivePointerId; 158f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1594eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki private int mInitialY; 1604eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki 161b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki private boolean mTouchingScrollingChild; 162b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki 163452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 164452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for instantiating BottomSheetBehaviors. 165452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 166452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior() { 167452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 168452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 169452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 170452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for inflating BottomSheetBehaviors from layout. 171452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 172452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param context The {@link Context}. 173452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param attrs The {@link AttributeSet}. 174452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 175452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior(Context context, AttributeSet attrs) { 176452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(context, attrs); 177452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki TypedArray a = context.obtainStyledAttributes(attrs, 178c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes R.styleable.BottomSheetBehavior_Layout); 17901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki TypedValue value = a.peekValue(R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight); 180606579592e9e9303a89cae2cf9bfe9f21572eec3Yuichi Araki if (value != null && value.data == PEEK_HEIGHT_AUTO) { 18101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki setPeekHeight(value.data); 18201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } else { 18301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki setPeekHeight(a.getDimensionPixelSize( 18401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight, PEEK_HEIGHT_AUTO)); 18501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 186c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_hideable, false)); 187362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki setSkipCollapsed(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_skipCollapsed, 188362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki false)); 189452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki a.recycle(); 190e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewConfiguration configuration = ViewConfiguration.get(context); 191e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 192452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 193452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 194452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 195452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public Parcelable onSaveInstanceState(CoordinatorLayout parent, V child) { 196452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState(super.onSaveInstanceState(parent, child), mState); 197452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 198452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 199452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 200452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state) { 201452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SavedState ss = (SavedState) state; 202452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.onRestoreInstanceState(parent, child, ss.getSuperState()); 203452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Intermediate states are restored as collapsed state 204f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (ss.state == STATE_DRAGGING || ss.state == STATE_SETTLING) { 205452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = STATE_COLLAPSED; 206f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 207f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mState = ss.state; 208452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 209452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 210452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 211452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 212452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) { 2136bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) { 2146bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki ViewCompat.setFitsSystemWindows(child, true); 215f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 2166bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki int savedTop = child.getTop(); 2176bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki // First let the parent lay it out 2186bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki parent.onLayoutChild(child, layoutDirection); 219452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Offset the bottom sheet 220452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mParentHeight = parent.getHeight(); 22101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki int peekHeight; 22201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (mPeekHeightAuto) { 22301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (mPeekHeightMin == 0) { 22401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeightMin = parent.getResources().getDimensionPixelSize( 22501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki R.dimen.design_bottom_sheet_peek_height_min); 22601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 22701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16); 22801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } else { 22901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki peekHeight = mPeekHeight; 23001ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 231452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMinOffset = Math.max(0, mParentHeight - child.getHeight()); 23201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset); 233452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == STATE_EXPANDED) { 234452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMinOffset); 235f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && mState == STATE_HIDDEN) { 236f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ViewCompat.offsetTopAndBottom(child, mParentHeight); 237f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mState == STATE_COLLAPSED) { 238452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMaxOffset); 2396bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) { 2406bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop()); 241452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 242452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper == null) { 243452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper = ViewDragHelper.create(parent, mDragCallback); 244452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 245452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewRef = new WeakReference<>(child); 2469aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child)); 247452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return true; 248452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 249452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 250452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 251452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 25217fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 25317fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 25417fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 255452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int action = MotionEventCompat.getActionMasked(event); 256e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 257e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 258e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 259e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 260e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 261e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 262e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 263e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 264452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki switch (action) { 265452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_UP: 266452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_CANCEL: 267b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = false; 268e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = MotionEvent.INVALID_POINTER_ID; 269452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Reset the ignore flag 270452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mIgnoreEvents) { 271452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mIgnoreEvents = false; 272452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return false; 273452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 274452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 275452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_DOWN: 2764eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki int initialX = (int) event.getX(); 2774eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mInitialY = (int) event.getY(); 2789aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 2794eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (scroll != null && parent.isPointInChildBounds(scroll, initialX, mInitialY)) { 280e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = event.getPointerId(event.getActionIndex()); 281b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = true; 2829aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 283e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mIgnoreEvents = mActivePointerId == MotionEvent.INVALID_POINTER_ID && 2844eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(child, initialX, mInitialY); 285452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 286452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 2874eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (!mIgnoreEvents && mViewDragHelper.shouldInterceptTouchEvent(event)) { 2884eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return true; 2894eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 2904eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // We have to handle cases that the ViewDragHelper does not capture the bottom sheet because 2914eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // it is not the top most view of its parent. This is not necessary when the touch event is 2924eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // happening over the scrolling content as nested scrolling logic handles that case. 2934eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki View scroll = mNestedScrollingChildRef.get(); 2944eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return action == MotionEvent.ACTION_MOVE && scroll != null && 2954eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !mIgnoreEvents && mState != STATE_DRAGGING && 2964eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(scroll, (int) event.getX(), (int) event.getY()) && 2974eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop(); 298452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 299452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 300452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 301452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 30217fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 30317fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 30417fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 305e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int action = MotionEventCompat.getActionMasked(event); 306e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING && action == MotionEvent.ACTION_DOWN) { 307e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return true; 308e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 309452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper.processTouchEvent(event); 310e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 311e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 312e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 313e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 314e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 315e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 316e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 317e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 3184eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // The ViewDragHelper tries to capture only the top-most View. We have to explicitly tell it 3194eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // to capture the bottom sheet in case it is not captured and the touch slop is passed. 320912d40d353f5b6d0a4fa18740ca40aa4b25b0f9cYuichi Araki if (action == MotionEvent.ACTION_MOVE && !mIgnoreEvents) { 3214eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop()) { 3224eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mViewDragHelper.captureChildView(child, event.getPointerId(event.getActionIndex())); 3234eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 3244eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 3251dbdc6baec537b45e9bd8e5afabcb5c35f1a8004Yuichi Araki return !mIgnoreEvents; 326452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 327452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 328e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 329e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, 330e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View directTargetChild, View target, int nestedScrollAxes) { 331e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = 0; 33249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 333e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0; 334e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 335e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 336e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 337e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, 338e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int dy, int[] consumed) { 339e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View scrollingChild = mNestedScrollingChildRef.get(); 340e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (target != scrollingChild) { 341e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 342e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 343e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int currentTop = child.getTop(); 344e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int newTop = currentTop - dy; 345e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (dy > 0) { // Upward 346e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop < mMinOffset) { 347e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMinOffset; 348e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 349e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_EXPANDED); 350e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 351e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 352e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 353e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 354e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 355e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (dy < 0) { // Downward 356e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (!ViewCompat.canScrollVertically(target, -1)) { 357e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop <= mMaxOffset || mHideable) { 358e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 359e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 360e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 361e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 362e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMaxOffset; 363e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 364e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_COLLAPSED); 365e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 366e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 367e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 368e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki dispatchOnSlide(child.getTop()); 369e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = dy; 37049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = true; 371e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 372e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 373e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 374e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) { 375b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (child.getTop() == mMinOffset) { 376b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki setStateInternal(STATE_EXPANDED); 377b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return; 378b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 379b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (target != mNestedScrollingChildRef.get() || !mNestedScrolled) { 380e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 381e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 382e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int top; 383e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int targetState; 384e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mLastNestedScrollDy > 0) { 385e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMinOffset; 386e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_EXPANDED; 387e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (mHideable && shouldHide(child, getYVelocity())) { 388e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mParentHeight; 389e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_HIDDEN; 39049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (mLastNestedScrollDy == 0) { 39149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = child.getTop(); 39249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 39349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 39449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 39549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 39649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 39749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 39849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 399e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 400e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMaxOffset; 401e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_COLLAPSED; 402e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 403e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 404e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_SETTLING); 405e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, targetState)); 406e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 407e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(targetState); 408e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 40949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 410e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 411e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 412e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 413e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target, 414e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki float velocityX, float velocityY) { 415e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return target == mNestedScrollingChildRef.get() && 416e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki (mState != STATE_EXPANDED || 417e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki super.onNestedPreFling(coordinatorLayout, child, target, 418e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki velocityX, velocityY)); 419e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 420e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 421452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 422452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the height of the bottom sheet when it is collapsed. 423452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 42401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki * @param peekHeight The height of the collapsed bottom sheet in pixels, or 42501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki * {@link #PEEK_HEIGHT_AUTO}. 42673e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight 427452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 428452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setPeekHeight(int peekHeight) { 42901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki boolean layout = false; 43001ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (peekHeight == PEEK_HEIGHT_AUTO) { 43101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (!mPeekHeightAuto) { 43201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeightAuto = true; 43301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki layout = true; 43401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 43501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } else if (mPeekHeightAuto || mPeekHeight != peekHeight) { 43601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeightAuto = false; 43701ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mPeekHeight = Math.max(0, peekHeight); 43801ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki mMaxOffset = mParentHeight - peekHeight; 43901ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki layout = true; 44001ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 44101ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (layout && mState == STATE_COLLAPSED && mViewRef != null) { 44201ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki V view = mViewRef.get(); 44301ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki if (view != null) { 44401ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki view.requestLayout(); 44501ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 44601ca48bfc8ad80dae2e2809420af1e4b80dd4ae5Yuichi Araki } 447452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 448452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 449452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 450452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the height of the bottom sheet when it is collapsed. 451452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 452452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The height of the collapsed bottom sheet. 45373e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight 454452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 455452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getPeekHeight() { 456452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mPeekHeight; 457452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 458452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 459452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 460f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Sets whether this bottom sheet can hide when it is swiped down. 461f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 462f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param hideable {@code true} to make this bottom sheet hideable. 46373e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable 464f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 465f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void setHideable(boolean hideable) { 466f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mHideable = hideable; 467f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 468f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 469f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 470f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Gets whether this bottom sheet can hide when it is swiped down. 471f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 472f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @return {@code true} if this bottom sheet can hide. 47373e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable 474f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 475f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public boolean isHideable() { 476f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mHideable; 477f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 478f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 479f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 480362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * Sets whether this bottom sheet should skip the collapsed state when it is being hidden 481362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * after it is expanded once. Setting this to true has no effect unless the sheet is hideable. 482362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * 483362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @param skipCollapsed True if the bottom sheet should skip the collapsed state. 484362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed 485362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki */ 486362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki public void setSkipCollapsed(boolean skipCollapsed) { 487362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki mSkipCollapsed = skipCollapsed; 488362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 489362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 490362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki /** 491362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * Sets whether this bottom sheet should skip the collapsed state when it is being hidden 492362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * after it is expanded once. 493362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * 494362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @return Whether the bottom sheet should skip the collapsed state. 495362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed 496362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki */ 497362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki public boolean getSkipCollapsed() { 498362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki return mSkipCollapsed; 499362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 500362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 501362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki /** 5024df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Sets a callback to be notified of bottom sheet events. 503f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 5044df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * @param callback The callback to notify when bottom sheet events occur. 505f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 5064df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public void setBottomSheetCallback(BottomSheetCallback callback) { 5074df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback = callback; 508f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 509f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 510f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 511452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the state of the bottom sheet. The bottom sheet will transition to that state with 512452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * animation. 513452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 514f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or 515f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * {@link #STATE_HIDDEN}. 516452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 517bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki public final void setState(final @State int state) { 518e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki if (state == mState) { 519e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki return; 520e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki } 52198475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim if (mViewRef == null) { 5226deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki // The view is not laid out yet; modify mState and let onLayoutChild handle it later 5236deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki if (state == STATE_COLLAPSED || state == STATE_EXPANDED || 5246deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki (mHideable && state == STATE_HIDDEN)) { 5256deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki mState = state; 5266deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki } 52798475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim return; 52898475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim } 529bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki final V child = mViewRef.get(); 530452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (child == null) { 531452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 532452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 533bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki // Start the animation; wait until a pending layout if there is one. 534bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki ViewParent parent = child.getParent(); 535bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki if (parent != null && parent.isLayoutRequested() && ViewCompat.isAttachedToWindow(child)) { 536bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki child.post(new Runnable() { 537bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki @Override 538bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki public void run() { 539bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki startSettlingAnimation(child, state); 540bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 541bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki }); 542452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 543bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki startSettlingAnimation(child, state); 544452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 545452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 546452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 547452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 548452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the current state of the bottom sheet. 549452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 550452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return One of {@link #STATE_EXPANDED}, {@link #STATE_COLLAPSED}, {@link #STATE_DRAGGING}, 551452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * and {@link #STATE_SETTLING}. 552452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 553452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 554452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getState() { 555452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mState; 556452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 557452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 558452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private void setStateInternal(@State int state) { 559452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == state) { 560452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 561452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 562452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = state; 563dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 564dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 565dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onStateChanged(bottomSheet, state); 566f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 567f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 568f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 569e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private void reset() { 570e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = ViewDragHelper.INVALID_POINTER; 571e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker != null) { 572e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.recycle(); 573e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = null; 574e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 575e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 576e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 577f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean shouldHide(View child, float yvel) { 578362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki if (mSkipCollapsed) { 579362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki return true; 580362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 581f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (child.getTop() < mMaxOffset) { 582f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki // It should not hide, but collapse. 583f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return false; 584f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 585f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki final float newTop = child.getTop() + yvel * HIDE_FRICTION; 586f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return Math.abs(newTop - mMaxOffset) / (float) mPeekHeight > HIDE_THRESHOLD; 587f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 588f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 5899aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private View findScrollingChild(View view) { 5909aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof NestedScrollingChild) { 5919aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return view; 5929aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5939aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof ViewGroup) { 5949aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki ViewGroup group = (ViewGroup) view; 5959aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki for (int i = 0, count = group.getChildCount(); i < count; i++) { 5969aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scrollingChild = findScrollingChild(group.getChildAt(i)); 5979aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scrollingChild != null) { 5989aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return scrollingChild; 5999aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6009aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6019aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6029aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return null; 603452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 604452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 605e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float getYVelocity() { 606e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 607e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId); 608e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 609e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 610bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki private void startSettlingAnimation(View child, int state) { 611bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki int top; 612bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki if (state == STATE_COLLAPSED) { 613bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki top = mMaxOffset; 614bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } else if (state == STATE_EXPANDED) { 615bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki top = mMinOffset; 616bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } else if (mHideable && state == STATE_HIDDEN) { 617bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki top = mParentHeight; 618bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } else { 619bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki throw new IllegalArgumentException("Illegal state argument: " + state); 620bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 621bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki setStateInternal(STATE_SETTLING); 622bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 623bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, state)); 624bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 625bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki } 626bfd8da2625c8198bd7d6884acb9f4b73ff35a2afYuichi Araki 627452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final ViewDragHelper.Callback mDragCallback = new ViewDragHelper.Callback() { 628452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 629452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 630452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean tryCaptureView(View child, int pointerId) { 631e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING) { 632e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return false; 633e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 634b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (mTouchingScrollingChild) { 635b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return false; 636b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 637e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_EXPANDED && mActivePointerId == pointerId) { 6389aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 6399aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scroll != null && ViewCompat.canScrollVertically(scroll, -1)) { 6409aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki // Let the content scroll up 6419aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return false; 6429aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6439aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 644f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mViewRef != null && mViewRef.get() == child; 645f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 646f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 647f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @Override 648f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { 649f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki dispatchOnSlide(top); 650452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 651452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 652452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 653452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewDragStateChanged(int state) { 654452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == ViewDragHelper.STATE_DRAGGING) { 655452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_DRAGGING); 656452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 657452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 658452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 659452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 660452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewReleased(View releasedChild, float xvel, float yvel) { 661452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 662452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State int targetState; 663f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (yvel < 0) { // Moving up 664452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 665452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_EXPANDED; 666f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && shouldHide(releasedChild, yvel)) { 667f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 668f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki targetState = STATE_HIDDEN; 66949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (yvel == 0.f) { 67049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = releasedChild.getTop(); 67149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 67249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 67349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 67449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 67549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 67649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 67749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 678452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 679452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 680452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_COLLAPSED; 681452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 682452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top)) { 683f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(STATE_SETTLING); 684452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(releasedChild, 685452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki new SettleRunnable(releasedChild, targetState)); 686f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 687f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(targetState); 688452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 689452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 690452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 691452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 692452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionVertical(View child, int top, int dy) { 693f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return MathUtils.constrain(top, mMinOffset, mHideable ? mParentHeight : mMaxOffset); 694452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 695452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 696452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 697452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionHorizontal(View child, int left, int dx) { 698452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return child.getLeft(); 699452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 700f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 7019aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki @Override 7029aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki public int getViewVerticalDragRange(View child) { 7039aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (mHideable) { 7049aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mParentHeight - mMinOffset; 7059aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } else { 7069aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mMaxOffset - mMinOffset; 7079aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 7089aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 709452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki }; 710452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 711f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private void dispatchOnSlide(int top) { 712dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 713dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 714f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (top > mMaxOffset) { 715dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onSlide(bottomSheet, (float) (mMaxOffset - top) / mPeekHeight); 716f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 717dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onSlide(bottomSheet, 718dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki (float) (mMaxOffset - top) / ((mMaxOffset - mMinOffset))); 719f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 720f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 721f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 722f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 723452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private class SettleRunnable implements Runnable { 724452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 725452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final View mView; 726452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 727452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 728452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final int mTargetState; 729452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 730452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SettleRunnable(View view, @State int targetState) { 731452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mView = view; 732452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mTargetState = targetState; 733452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 734452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 735452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 736452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void run() { 737452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) { 738452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(mView, this); 739452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 740452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(mTargetState); 741452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 742452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 743452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 744452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 74505f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes protected static class SavedState extends AbsSavedState { 746452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 747452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki final int state; 748452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 749452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcel source) { 75005f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes this(source, null); 75105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes } 75205f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes 75305f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes public SavedState(Parcel source, ClassLoader loader) { 75405f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes super(source, loader); 755452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki //noinspection ResourceType 756452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki state = source.readInt(); 757452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 758452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 759452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcelable superState, @State int state) { 760452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(superState); 761452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki this.state = state; 762452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 763452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 764452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 765452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void writeToParcel(Parcel out, int flags) { 766452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.writeToParcel(out, flags); 767452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki out.writeInt(state); 768452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 769452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 77005f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes public static final Creator<SavedState> CREATOR = ParcelableCompat.newCreator( 77105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes new ParcelableCompatCreatorCallbacks<SavedState>() { 772452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 77305f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes public SavedState createFromParcel(Parcel in, ClassLoader loader) { 77405f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes return new SavedState(in, loader); 775452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 776452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 777452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 778452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState[] newArray(int size) { 779452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState[size]; 780452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 78105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes }); 782452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 783452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 784f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 785452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * A utility function to get the {@link BottomSheetBehavior} associated with the {@code view}. 786452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 787452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param view The {@link View} with {@link BottomSheetBehavior}. 788452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The {@link BottomSheetBehavior} associated with the {@code view}. 789452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 790452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @SuppressWarnings("unchecked") 791452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static <V extends View> BottomSheetBehavior<V> from(V view) { 792452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewGroup.LayoutParams params = view.getLayoutParams(); 793452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(params instanceof CoordinatorLayout.LayoutParams)) { 794452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("The view is not a child of CoordinatorLayout"); 795452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 796452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) params) 797452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki .getBehavior(); 798452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(behavior instanceof BottomSheetBehavior)) { 799452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException( 800452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki "The view is not associated with BottomSheetBehavior"); 801452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 802452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return (BottomSheetBehavior<V>) behavior; 803452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 804452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 805452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki} 806