BottomSheetBehavior.java revision 362585b01e5ca19d1c58e4b152ad0a863b5f6d91
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; 35452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.MotionEvent; 36e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.VelocityTracker; 37452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.View; 38e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.ViewConfiguration; 39452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.ViewGroup; 40452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 41452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.Retention; 42452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.RetentionPolicy; 43452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.ref.WeakReference; 44452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 45452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 46452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki/** 47452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * An interaction behavior plugin for a child view of {@link CoordinatorLayout} to make it work as 48452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * a bottom sheet. 49452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 50452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakipublic class BottomSheetBehavior<V extends View> extends CoordinatorLayout.Behavior<V> { 51452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 52452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 534df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Callback for monitoring events about bottom sheets. 54f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 554df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public abstract static class BottomSheetCallback { 56f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 57f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 58f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet changes its state. 59f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 60dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 61dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param newState The new state. This will be one of {@link #STATE_DRAGGING}, 62dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_SETTLING}, {@link #STATE_EXPANDED}, 63dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_COLLAPSED}, or {@link #STATE_HIDDEN}. 64f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 65dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onStateChanged(@NonNull View bottomSheet, @State int newState); 66f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 67f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 68f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet is being dragged. 69f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 70dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 71f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param slideOffset The new offset of this bottom sheet within its range, from 0 to 1 72f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * when it is moving upward, and from 0 to -1 when it moving downward. 73f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 74dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onSlide(@NonNull View bottomSheet, float slideOffset); 75f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 76f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 77f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 78452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is dragging. 79452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 80452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_DRAGGING = 1; 81452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 82452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 83452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is settling. 84452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 85452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_SETTLING = 2; 86452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 87452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 88452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is expanded. 89452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 90452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_EXPANDED = 3; 91452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 92452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 93452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is collapsed. 94452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 95452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_COLLAPSED = 4; 96452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 97f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 98f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * The bottom sheet is hidden. 99f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 100f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public static final int STATE_HIDDEN = 5; 101f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 102452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** @hide */ 103f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @IntDef({STATE_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, STATE_SETTLING, STATE_HIDDEN}) 104452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Retention(RetentionPolicy.SOURCE) 105452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public @interface State {} 106452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 107f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_THRESHOLD = 0.5f; 108f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 109f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_FRICTION = 0.1f; 110f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 111e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float mMaximumVelocity; 112f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 113452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mPeekHeight; 114452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 115452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMinOffset; 116452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 117452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMaxOffset; 118452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 119f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean mHideable; 120f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 121362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki private boolean mSkipCollapsed; 122362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 123452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 124452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mState = STATE_COLLAPSED; 125452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 126452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private ViewDragHelper mViewDragHelper; 127452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 128452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private boolean mIgnoreEvents; 129452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 130e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private int mLastNestedScrollDy; 131e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 13249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki private boolean mNestedScrolled; 13349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki 134452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mParentHeight; 135452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 136452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private WeakReference<V> mViewRef; 137452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 1389aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private WeakReference<View> mNestedScrollingChildRef; 139f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1409aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private BottomSheetCallback mCallback; 141f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 142e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private VelocityTracker mVelocityTracker; 143e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 144e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private int mActivePointerId; 145f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1464eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki private int mInitialY; 1474eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki 148b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki private boolean mTouchingScrollingChild; 149b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki 150452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 151452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for instantiating BottomSheetBehaviors. 152452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 153452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior() { 154452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 155452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 156452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 157452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for inflating BottomSheetBehaviors from layout. 158452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 159452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param context The {@link Context}. 160452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param attrs The {@link AttributeSet}. 161452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 162452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior(Context context, AttributeSet attrs) { 163452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(context, attrs); 164452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki TypedArray a = context.obtainStyledAttributes(attrs, 165c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes R.styleable.BottomSheetBehavior_Layout); 166452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setPeekHeight(a.getDimensionPixelSize( 167c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight, 0)); 168c6cbbb50a06ec08e6888bd1c3dfd7fdf588d9db5Chris Banes setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_hideable, false)); 169362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki setSkipCollapsed(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_skipCollapsed, 170362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki false)); 171452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki a.recycle(); 172e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewConfiguration configuration = ViewConfiguration.get(context); 173e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 174452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 175452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 176452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 177452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public Parcelable onSaveInstanceState(CoordinatorLayout parent, V child) { 178452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState(super.onSaveInstanceState(parent, child), mState); 179452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 180452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 181452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 182452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state) { 183452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SavedState ss = (SavedState) state; 184452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.onRestoreInstanceState(parent, child, ss.getSuperState()); 185452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Intermediate states are restored as collapsed state 186f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (ss.state == STATE_DRAGGING || ss.state == STATE_SETTLING) { 187452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = STATE_COLLAPSED; 188f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 189f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mState = ss.state; 190452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 191452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 192452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 193452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 194452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) { 1956bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) { 1966bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki ViewCompat.setFitsSystemWindows(child, true); 197f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 1986bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki int savedTop = child.getTop(); 1996bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki // First let the parent lay it out 2006bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki parent.onLayoutChild(child, layoutDirection); 201452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Offset the bottom sheet 202452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mParentHeight = parent.getHeight(); 203452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMinOffset = Math.max(0, mParentHeight - child.getHeight()); 2043bd9d18c5855600254e907d6668f2ec4d7fd1c51Yuichi Araki mMaxOffset = Math.max(mParentHeight - mPeekHeight, mMinOffset); 205452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == STATE_EXPANDED) { 206452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMinOffset); 207f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && mState == STATE_HIDDEN) { 208f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ViewCompat.offsetTopAndBottom(child, mParentHeight); 209f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mState == STATE_COLLAPSED) { 210452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMaxOffset); 2116bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) { 2126bef5a31fd4bbfc70b21c0f694bcb272e88400a3Yuichi Araki ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop()); 213452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 214452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper == null) { 215452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper = ViewDragHelper.create(parent, mDragCallback); 216452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 217452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewRef = new WeakReference<>(child); 2189aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child)); 219452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return true; 220452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 221452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 222452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 223452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 22417fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 22517fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 22617fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 227452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int action = MotionEventCompat.getActionMasked(event); 228e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 229e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 230e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 231e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 232e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 233e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 234e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 235e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 236452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki switch (action) { 237452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_UP: 238452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_CANCEL: 239b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = false; 240e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = MotionEvent.INVALID_POINTER_ID; 241452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Reset the ignore flag 242452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mIgnoreEvents) { 243452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mIgnoreEvents = false; 244452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return false; 245452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 246452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 247452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_DOWN: 2484eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki int initialX = (int) event.getX(); 2494eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mInitialY = (int) event.getY(); 2509aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 2514eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (scroll != null && parent.isPointInChildBounds(scroll, initialX, mInitialY)) { 252e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = event.getPointerId(event.getActionIndex()); 253b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = true; 2549aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 255e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mIgnoreEvents = mActivePointerId == MotionEvent.INVALID_POINTER_ID && 2564eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(child, initialX, mInitialY); 257452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 258452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 2594eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (!mIgnoreEvents && mViewDragHelper.shouldInterceptTouchEvent(event)) { 2604eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return true; 2614eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 2624eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // We have to handle cases that the ViewDragHelper does not capture the bottom sheet because 2634eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // it is not the top most view of its parent. This is not necessary when the touch event is 2644eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // happening over the scrolling content as nested scrolling logic handles that case. 2654eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki View scroll = mNestedScrollingChildRef.get(); 2664eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return action == MotionEvent.ACTION_MOVE && scroll != null && 2674eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !mIgnoreEvents && mState != STATE_DRAGGING && 2684eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(scroll, (int) event.getX(), (int) event.getY()) && 2694eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop(); 270452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 271452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 272452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 273452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 27417fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 27517fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 27617fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 277e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int action = MotionEventCompat.getActionMasked(event); 278e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING && action == MotionEvent.ACTION_DOWN) { 279e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return true; 280e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 281452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper.processTouchEvent(event); 282e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 283e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 284e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 285e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 286e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 287e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 288e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 289e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 2904eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // The ViewDragHelper tries to capture only the top-most View. We have to explicitly tell it 2914eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // to capture the bottom sheet in case it is not captured and the touch slop is passed. 292912d40d353f5b6d0a4fa18740ca40aa4b25b0f9cYuichi Araki if (action == MotionEvent.ACTION_MOVE && !mIgnoreEvents) { 2934eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop()) { 2944eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mViewDragHelper.captureChildView(child, event.getPointerId(event.getActionIndex())); 2954eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 2964eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 2971dbdc6baec537b45e9bd8e5afabcb5c35f1a8004Yuichi Araki return !mIgnoreEvents; 298452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 299452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 300e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 301e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, 302e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View directTargetChild, View target, int nestedScrollAxes) { 303e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = 0; 30449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 305e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0; 306e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 307e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 308e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 309e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, 310e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int dy, int[] consumed) { 311e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View scrollingChild = mNestedScrollingChildRef.get(); 312e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (target != scrollingChild) { 313e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 314e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 315e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int currentTop = child.getTop(); 316e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int newTop = currentTop - dy; 317e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (dy > 0) { // Upward 318e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop < mMinOffset) { 319e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMinOffset; 320e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 321e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_EXPANDED); 322e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 323e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 324e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 325e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 326e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 327e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (dy < 0) { // Downward 328e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (!ViewCompat.canScrollVertically(target, -1)) { 329e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop <= mMaxOffset || mHideable) { 330e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 331e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 332e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 333e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 334e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMaxOffset; 335e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 336e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_COLLAPSED); 337e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 338e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 339e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 340e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki dispatchOnSlide(child.getTop()); 341e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = dy; 34249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = true; 343e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 344e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 345e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 346e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) { 347b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (child.getTop() == mMinOffset) { 348b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki setStateInternal(STATE_EXPANDED); 349b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return; 350b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 351b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (target != mNestedScrollingChildRef.get() || !mNestedScrolled) { 352e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 353e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 354e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int top; 355e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int targetState; 356e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mLastNestedScrollDy > 0) { 357e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMinOffset; 358e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_EXPANDED; 359e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (mHideable && shouldHide(child, getYVelocity())) { 360e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mParentHeight; 361e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_HIDDEN; 36249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (mLastNestedScrollDy == 0) { 36349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = child.getTop(); 36449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 36549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 36649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 36749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 36849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 36949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 37049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 371e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 372e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMaxOffset; 373e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_COLLAPSED; 374e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 375e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 376e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_SETTLING); 377e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, targetState)); 378e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 379e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(targetState); 380e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 38149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 382e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 383e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 384e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 385e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target, 386e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki float velocityX, float velocityY) { 387e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return target == mNestedScrollingChildRef.get() && 388e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki (mState != STATE_EXPANDED || 389e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki super.onNestedPreFling(coordinatorLayout, child, target, 390e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki velocityX, velocityY)); 391e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 392e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 393452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 394452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the height of the bottom sheet when it is collapsed. 395452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 396452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param peekHeight The height of the collapsed bottom sheet in pixels. 39773e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight 398452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 399452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setPeekHeight(int peekHeight) { 400452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mPeekHeight = Math.max(0, peekHeight); 401452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMaxOffset = mParentHeight - peekHeight; 402452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 403452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 404452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 405452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the height of the bottom sheet when it is collapsed. 406452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 407452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The height of the collapsed bottom sheet. 40873e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight 409452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 410452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getPeekHeight() { 411452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mPeekHeight; 412452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 413452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 414452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 415f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Sets whether this bottom sheet can hide when it is swiped down. 416f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 417f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param hideable {@code true} to make this bottom sheet hideable. 41873e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable 419f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 420f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void setHideable(boolean hideable) { 421f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mHideable = hideable; 422f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 423f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 424f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 425f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Gets whether this bottom sheet can hide when it is swiped down. 426f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 427f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @return {@code true} if this bottom sheet can hide. 42873e7a06fb66110495fa4e98a91831a47feab2526Chris Banes * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable 429f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 430f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public boolean isHideable() { 431f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mHideable; 432f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 433f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 434f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 435362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * Sets whether this bottom sheet should skip the collapsed state when it is being hidden 436362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * after it is expanded once. Setting this to true has no effect unless the sheet is hideable. 437362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * 438362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @param skipCollapsed True if the bottom sheet should skip the collapsed state. 439362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed 440362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki */ 441362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki public void setSkipCollapsed(boolean skipCollapsed) { 442362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki mSkipCollapsed = skipCollapsed; 443362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 444362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 445362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki /** 446362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * Sets whether this bottom sheet should skip the collapsed state when it is being hidden 447362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * after it is expanded once. 448362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * 449362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @return Whether the bottom sheet should skip the collapsed state. 450362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed 451362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki */ 452362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki public boolean getSkipCollapsed() { 453362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki return mSkipCollapsed; 454362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 455362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki 456362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki /** 4574df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Sets a callback to be notified of bottom sheet events. 458f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 4594df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * @param callback The callback to notify when bottom sheet events occur. 460f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 4614df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public void setBottomSheetCallback(BottomSheetCallback callback) { 4624df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback = callback; 463f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 464f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 465f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 466452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the state of the bottom sheet. The bottom sheet will transition to that state with 467452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * animation. 468452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 469f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or 470f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * {@link #STATE_HIDDEN}. 471452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 472452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setState(@State int state) { 473e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki if (state == mState) { 474e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki return; 475e0573dfb5896eb66e266ea366d8c58437c739c95Yuichi Araki } 47698475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim if (mViewRef == null) { 4776deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki // The view is not laid out yet; modify mState and let onLayoutChild handle it later 4786deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki if (state == STATE_COLLAPSED || state == STATE_EXPANDED || 4796deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki (mHideable && state == STATE_HIDDEN)) { 4806deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki mState = state; 4816deb3a9dc52be7ab61702c430bb327343ef099acYuichi Araki } 48298475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim return; 48398475d29e771d7b15e4a109b22f410c7c1cf33d7Taeho Kim } 484452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki V child = mViewRef.get(); 485452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (child == null) { 486452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 487452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 488452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 489452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == STATE_COLLAPSED) { 490452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 491452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else if (state == STATE_EXPANDED) { 492452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 493f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && state == STATE_HIDDEN) { 494f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 495452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 496452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("Illegal state argument: " + state); 497452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 498452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_SETTLING); 499452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 500452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, state)); 501452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 502452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 503452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 504452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 505452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the current state of the bottom sheet. 506452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 507452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return One of {@link #STATE_EXPANDED}, {@link #STATE_COLLAPSED}, {@link #STATE_DRAGGING}, 508452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * and {@link #STATE_SETTLING}. 509452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 510452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 511452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getState() { 512452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mState; 513452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 514452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 515452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private void setStateInternal(@State int state) { 516452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == state) { 517452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 518452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 519452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = state; 520dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 521dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 522dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onStateChanged(bottomSheet, state); 523f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 524f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 525f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 526e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private void reset() { 527e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = ViewDragHelper.INVALID_POINTER; 528e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker != null) { 529e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.recycle(); 530e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = null; 531e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 532e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 533e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 534f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean shouldHide(View child, float yvel) { 535362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki if (mSkipCollapsed) { 536362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki return true; 537362585b01e5ca19d1c58e4b152ad0a863b5f6d91Yuichi Araki } 538f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (child.getTop() < mMaxOffset) { 539f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki // It should not hide, but collapse. 540f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return false; 541f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 542f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki final float newTop = child.getTop() + yvel * HIDE_FRICTION; 543f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return Math.abs(newTop - mMaxOffset) / (float) mPeekHeight > HIDE_THRESHOLD; 544f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 545f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 5469aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private View findScrollingChild(View view) { 5479aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof NestedScrollingChild) { 5489aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return view; 5499aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5509aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof ViewGroup) { 5519aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki ViewGroup group = (ViewGroup) view; 5529aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki for (int i = 0, count = group.getChildCount(); i < count; i++) { 5539aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scrollingChild = findScrollingChild(group.getChildAt(i)); 5549aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scrollingChild != null) { 5559aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return scrollingChild; 5569aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5579aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5589aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5599aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return null; 560452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 561452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 562e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float getYVelocity() { 563e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 564e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId); 565e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 566e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 567452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final ViewDragHelper.Callback mDragCallback = new ViewDragHelper.Callback() { 568452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 569452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 570452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean tryCaptureView(View child, int pointerId) { 571e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING) { 572e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return false; 573e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 574b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (mTouchingScrollingChild) { 575b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return false; 576b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 577e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_EXPANDED && mActivePointerId == pointerId) { 5789aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 5799aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scroll != null && ViewCompat.canScrollVertically(scroll, -1)) { 5809aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki // Let the content scroll up 5819aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return false; 5829aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5839aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 584f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mViewRef != null && mViewRef.get() == child; 585f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 586f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 587f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @Override 588f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { 589f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki dispatchOnSlide(top); 590452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 591452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 592452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 593452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewDragStateChanged(int state) { 594452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == ViewDragHelper.STATE_DRAGGING) { 595452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_DRAGGING); 596452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 597452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 598452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 599452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 600452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewReleased(View releasedChild, float xvel, float yvel) { 601452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 602452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State int targetState; 603f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (yvel < 0) { // Moving up 604452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 605452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_EXPANDED; 606f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && shouldHide(releasedChild, yvel)) { 607f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 608f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki targetState = STATE_HIDDEN; 60949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (yvel == 0.f) { 61049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = releasedChild.getTop(); 61149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 61249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 61349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 61449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 61549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 61649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 61749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 618452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 619452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 620452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_COLLAPSED; 621452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 622452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top)) { 623f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(STATE_SETTLING); 624452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(releasedChild, 625452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki new SettleRunnable(releasedChild, targetState)); 626f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 627f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(targetState); 628452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 629452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 630452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 631452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 632452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionVertical(View child, int top, int dy) { 633f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return MathUtils.constrain(top, mMinOffset, mHideable ? mParentHeight : mMaxOffset); 634452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 635452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 636452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 637452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionHorizontal(View child, int left, int dx) { 638452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return child.getLeft(); 639452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 640f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 6419aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki @Override 6429aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki public int getViewVerticalDragRange(View child) { 6439aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (mHideable) { 6449aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mParentHeight - mMinOffset; 6459aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } else { 6469aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mMaxOffset - mMinOffset; 6479aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6489aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 649452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki }; 650452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 651f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private void dispatchOnSlide(int top) { 652dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 653dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 654f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (top > mMaxOffset) { 655dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onSlide(bottomSheet, (float) (mMaxOffset - top) / mPeekHeight); 656f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 657dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onSlide(bottomSheet, 658dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki (float) (mMaxOffset - top) / ((mMaxOffset - mMinOffset))); 659f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 660f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 661f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 662f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 663452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private class SettleRunnable implements Runnable { 664452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 665452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final View mView; 666452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 667452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 668452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final int mTargetState; 669452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 670452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SettleRunnable(View view, @State int targetState) { 671452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mView = view; 672452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mTargetState = targetState; 673452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 674452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 675452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 676452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void run() { 677452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) { 678452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(mView, this); 679452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 680452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(mTargetState); 681452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 682452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 683452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 684452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 68505f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes protected static class SavedState extends AbsSavedState { 686452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 687452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki final int state; 688452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 689452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcel source) { 69005f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes this(source, null); 69105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes } 69205f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes 69305f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes public SavedState(Parcel source, ClassLoader loader) { 69405f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes super(source, loader); 695452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki //noinspection ResourceType 696452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki state = source.readInt(); 697452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 698452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 699452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcelable superState, @State int state) { 700452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(superState); 701452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki this.state = state; 702452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 703452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 704452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 705452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void writeToParcel(Parcel out, int flags) { 706452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.writeToParcel(out, flags); 707452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki out.writeInt(state); 708452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 709452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 71005f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes public static final Creator<SavedState> CREATOR = ParcelableCompat.newCreator( 71105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes new ParcelableCompatCreatorCallbacks<SavedState>() { 712452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 71305f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes public SavedState createFromParcel(Parcel in, ClassLoader loader) { 71405f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes return new SavedState(in, loader); 715452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 716452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 717452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 718452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState[] newArray(int size) { 719452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState[size]; 720452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 72105f5ba020fa6caa658c75b6d77436aa980ca0fccChris Banes }); 722452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 723452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 724f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 725452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * A utility function to get the {@link BottomSheetBehavior} associated with the {@code view}. 726452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 727452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param view The {@link View} with {@link BottomSheetBehavior}. 728452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The {@link BottomSheetBehavior} associated with the {@code view}. 729452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 730452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @SuppressWarnings("unchecked") 731452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static <V extends View> BottomSheetBehavior<V> from(V view) { 732452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewGroup.LayoutParams params = view.getLayoutParams(); 733452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(params instanceof CoordinatorLayout.LayoutParams)) { 734452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("The view is not a child of CoordinatorLayout"); 735452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 736452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) params) 737452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki .getBehavior(); 738452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(behavior instanceof BottomSheetBehavior)) { 739452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException( 740452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki "The view is not associated with BottomSheetBehavior"); 741452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 742452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return (BottomSheetBehavior<V>) behavior; 743452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 744452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 745452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki} 746