BottomSheetBehavior.java revision b1eb1357ec33343b7271a6d3876ac4af84e15510
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; 26452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.view.MotionEventCompat; 279aec720809a123c6193304730acf8b55d6ce5a7aYuichi Arakiimport android.support.v4.view.NestedScrollingChild; 28e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.support.v4.view.VelocityTrackerCompat; 29452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.view.ViewCompat; 30452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.support.v4.widget.ViewDragHelper; 31452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.util.AttributeSet; 32452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.MotionEvent; 33e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.VelocityTracker; 34452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.View; 35e3e7063749d095bba8743cad0aeb7164a567890dYuichi Arakiimport android.view.ViewConfiguration; 36452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport android.view.ViewGroup; 37452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 38452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.Retention; 39452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.annotation.RetentionPolicy; 40452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakiimport java.lang.ref.WeakReference; 41452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 42452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 43452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki/** 44452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * An interaction behavior plugin for a child view of {@link CoordinatorLayout} to make it work as 45452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * a bottom sheet. 46452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 47452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Arakipublic class BottomSheetBehavior<V extends View> extends CoordinatorLayout.Behavior<V> { 48452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 49452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 504df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Callback for monitoring events about bottom sheets. 51f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 524df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public abstract static class BottomSheetCallback { 53f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 54f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 55f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet changes its state. 56f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 57dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 58dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param newState The new state. This will be one of {@link #STATE_DRAGGING}, 59dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_SETTLING}, {@link #STATE_EXPANDED}, 60dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * {@link #STATE_COLLAPSED}, or {@link #STATE_HIDDEN}. 61f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 62dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onStateChanged(@NonNull View bottomSheet, @State int newState); 63f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 64f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 65f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Called when the bottom sheet is being dragged. 66f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 67dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki * @param bottomSheet The bottom sheet view. 68f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param slideOffset The new offset of this bottom sheet within its range, from 0 to 1 69f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * when it is moving upward, and from 0 to -1 when it moving downward. 70f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 71dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki public abstract void onSlide(@NonNull View bottomSheet, float slideOffset); 72f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 73f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 74f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 75452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is dragging. 76452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 77452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_DRAGGING = 1; 78452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 79452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 80452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is settling. 81452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 82452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_SETTLING = 2; 83452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 84452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 85452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is expanded. 86452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 87452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_EXPANDED = 3; 88452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 89452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 90452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * The bottom sheet is collapsed. 91452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 92452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final int STATE_COLLAPSED = 4; 93452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 94f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 95f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * The bottom sheet is hidden. 96f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 97f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public static final int STATE_HIDDEN = 5; 98f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 99452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** @hide */ 100f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @IntDef({STATE_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, STATE_SETTLING, STATE_HIDDEN}) 101452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Retention(RetentionPolicy.SOURCE) 102452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public @interface State {} 103452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 104f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_THRESHOLD = 0.5f; 105f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 106f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private static final float HIDE_FRICTION = 0.1f; 107f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 108e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float mMaximumVelocity; 109f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 110452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mPeekHeight; 111452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 112452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMinOffset; 113452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 114452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mMaxOffset; 115452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 116f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean mHideable; 117f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 118452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 119452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mState = STATE_COLLAPSED; 120452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 121452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private ViewDragHelper mViewDragHelper; 122452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 123452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private boolean mIgnoreEvents; 124452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 125e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private int mLastNestedScrollDy; 126e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 12749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki private boolean mNestedScrolled; 12849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki 129452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private int mParentHeight; 130452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 131452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private WeakReference<V> mViewRef; 132452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 1339aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private WeakReference<View> mNestedScrollingChildRef; 134f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1359aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private BottomSheetCallback mCallback; 136f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 137e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private VelocityTracker mVelocityTracker; 138e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 139e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private int mActivePointerId; 140f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 1414eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki private int mInitialY; 1424eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki 143b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki private boolean mTouchingScrollingChild; 144b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki 145452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 146452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for instantiating BottomSheetBehaviors. 147452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 148452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior() { 149452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 150452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 151452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 152452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Default constructor for inflating BottomSheetBehaviors from layout. 153452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 154452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param context The {@link Context}. 155452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param attrs The {@link AttributeSet}. 156452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 157452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public BottomSheetBehavior(Context context, AttributeSet attrs) { 158452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(context, attrs); 159452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki TypedArray a = context.obtainStyledAttributes(attrs, 160452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki R.styleable.BottomSheetBehavior_Params); 161452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setPeekHeight(a.getDimensionPixelSize( 162452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki R.styleable.BottomSheetBehavior_Params_behavior_peekHeight, 0)); 163f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Params_behavior_hideable, false)); 164452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki a.recycle(); 165e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewConfiguration configuration = ViewConfiguration.get(context); 166e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 167452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 168452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 169452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 170452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public Parcelable onSaveInstanceState(CoordinatorLayout parent, V child) { 171452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState(super.onSaveInstanceState(parent, child), mState); 172452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 173452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 174452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 175452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state) { 176452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SavedState ss = (SavedState) state; 177452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.onRestoreInstanceState(parent, child, ss.getSuperState()); 178452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Intermediate states are restored as collapsed state 179f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (ss.state == STATE_DRAGGING || ss.state == STATE_SETTLING) { 180452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = STATE_COLLAPSED; 181f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 182f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mState = ss.state; 183452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 184452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 185452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 186452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 187452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) { 188452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // First let the parent lay it out 189f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (mState != STATE_DRAGGING && mState != STATE_SETTLING) { 190f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki parent.onLayoutChild(child, layoutDirection); 191f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 192452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Offset the bottom sheet 193452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mParentHeight = parent.getHeight(); 194452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMinOffset = Math.max(0, mParentHeight - child.getHeight()); 195452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMaxOffset = mParentHeight - mPeekHeight; 196452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == STATE_EXPANDED) { 197452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMinOffset); 198f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && mState == STATE_HIDDEN) { 199f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki ViewCompat.offsetTopAndBottom(child, mParentHeight); 200f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mState == STATE_COLLAPSED) { 201452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.offsetTopAndBottom(child, mMaxOffset); 202452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 203452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper == null) { 204452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper = ViewDragHelper.create(parent, mDragCallback); 205452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 206452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewRef = new WeakReference<>(child); 2079aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child)); 208452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return true; 209452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 210452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 211452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 212452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 21317fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 21417fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 21517fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 216452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int action = MotionEventCompat.getActionMasked(event); 217e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 218e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 219e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 220e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 221e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 222e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 223e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 224e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 225452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki switch (action) { 226452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_UP: 227452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_CANCEL: 228b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = false; 229e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = MotionEvent.INVALID_POINTER_ID; 230452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki // Reset the ignore flag 231452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mIgnoreEvents) { 232452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mIgnoreEvents = false; 233452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return false; 234452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 235452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 236452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki case MotionEvent.ACTION_DOWN: 2374eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki int initialX = (int) event.getX(); 2384eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mInitialY = (int) event.getY(); 2399aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 2404eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (scroll != null && parent.isPointInChildBounds(scroll, initialX, mInitialY)) { 241e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = event.getPointerId(event.getActionIndex()); 242b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki mTouchingScrollingChild = true; 2439aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 244e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mIgnoreEvents = mActivePointerId == MotionEvent.INVALID_POINTER_ID && 2454eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(child, initialX, mInitialY); 246452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki break; 247452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 2484eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (!mIgnoreEvents && mViewDragHelper.shouldInterceptTouchEvent(event)) { 2494eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return true; 2504eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 2514eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // We have to handle cases that the ViewDragHelper does not capture the bottom sheet because 2524eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // it is not the top most view of its parent. This is not necessary when the touch event is 2534eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // happening over the scrolling content as nested scrolling logic handles that case. 2544eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki View scroll = mNestedScrollingChildRef.get(); 2554eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki return action == MotionEvent.ACTION_MOVE && scroll != null && 2564eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !mIgnoreEvents && mState != STATE_DRAGGING && 2574eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki !parent.isPointInChildBounds(scroll, (int) event.getX(), (int) event.getY()) && 2584eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop(); 259452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 260452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 261452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 262452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { 26317fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki if (!child.isShown()) { 26417fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki return false; 26517fc77f5ca7c91daeab2e110669d9baf9d1a8090Yuichi Araki } 266e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int action = MotionEventCompat.getActionMasked(event); 267e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING && action == MotionEvent.ACTION_DOWN) { 268e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return true; 269e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 270452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mViewDragHelper.processTouchEvent(event); 271e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki // Record the velocity 272e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (action == MotionEvent.ACTION_DOWN) { 273e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki reset(); 274e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 275e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker == null) { 276e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = VelocityTracker.obtain(); 277e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 278e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.addMovement(event); 2794eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // The ViewDragHelper tries to capture only the top-most View. We have to explicitly tell it 2804eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki // to capture the bottom sheet in case it is not captured and the touch slop is passed. 2814eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (action == MotionEvent.ACTION_MOVE) { 2824eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki if (Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop()) { 2834eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki mViewDragHelper.captureChildView(child, event.getPointerId(event.getActionIndex())); 2844eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 2854eb453c75e552a2e0231a93468d9597a4069286eYuichi Araki } 286452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return true; 287452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 288452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 289e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 290e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, 291e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View directTargetChild, View target, int nestedScrollAxes) { 292e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = 0; 29349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 294e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0; 295e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 296e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 297e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 298e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, 299e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int dy, int[] consumed) { 300e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki View scrollingChild = mNestedScrollingChildRef.get(); 301e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (target != scrollingChild) { 302e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 303e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 304e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int currentTop = child.getTop(); 305e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int newTop = currentTop - dy; 306e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (dy > 0) { // Upward 307e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop < mMinOffset) { 308e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMinOffset; 309e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 310e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_EXPANDED); 311e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 312e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 313e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 314e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 315e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 316e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (dy < 0) { // Downward 317e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (!ViewCompat.canScrollVertically(target, -1)) { 318e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (newTop <= mMaxOffset || mHideable) { 319e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = dy; 320e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -dy); 321e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_DRAGGING); 322e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 323e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki consumed[1] = currentTop - mMaxOffset; 324e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.offsetTopAndBottom(child, -consumed[1]); 325e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_COLLAPSED); 326e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 327e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 328e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 329e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki dispatchOnSlide(child.getTop()); 330e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mLastNestedScrollDy = dy; 33149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = true; 332e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 333e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 334e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 335e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) { 336b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (child.getTop() == mMinOffset) { 337b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki setStateInternal(STATE_EXPANDED); 338b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return; 339b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 340b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (target != mNestedScrollingChildRef.get() || !mNestedScrolled) { 341e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return; 342e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 343e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int top; 344e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki int targetState; 345e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mLastNestedScrollDy > 0) { 346e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMinOffset; 347e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_EXPANDED; 348e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else if (mHideable && shouldHide(child, getYVelocity())) { 349e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mParentHeight; 350e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_HIDDEN; 35149a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (mLastNestedScrollDy == 0) { 35249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = child.getTop(); 35349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 35449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 35549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 35649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 35749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 35849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 35949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 360e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 361e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki top = mMaxOffset; 362e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki targetState = STATE_COLLAPSED; 363e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 364e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 365e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(STATE_SETTLING); 366e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, targetState)); 367e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } else { 368e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki setStateInternal(targetState); 369e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 37049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki mNestedScrolled = false; 371e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 372e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 373e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki @Override 374e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target, 375e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki float velocityX, float velocityY) { 376e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return target == mNestedScrollingChildRef.get() && 377e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki (mState != STATE_EXPANDED || 378e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki super.onNestedPreFling(coordinatorLayout, child, target, 379e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki velocityX, velocityY)); 380e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 381e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 382452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 383452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the height of the bottom sheet when it is collapsed. 384452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 385452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param peekHeight The height of the collapsed bottom sheet in pixels. 386452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_peekHeight 387452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 388452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setPeekHeight(int peekHeight) { 389452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mPeekHeight = Math.max(0, peekHeight); 390452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mMaxOffset = mParentHeight - peekHeight; 391452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 392452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 393452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 394452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the height of the bottom sheet when it is collapsed. 395452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 396452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The height of the collapsed bottom sheet. 397452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_peekHeight 398452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 399452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getPeekHeight() { 400452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mPeekHeight; 401452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 402452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 403452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 404f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Sets whether this bottom sheet can hide when it is swiped down. 405f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 406f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param hideable {@code true} to make this bottom sheet hideable. 407f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_hideable 408f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 409f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void setHideable(boolean hideable) { 410f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki mHideable = hideable; 411f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 412f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 413f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 414f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * Gets whether this bottom sheet can hide when it is swiped down. 415f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 416f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @return {@code true} if this bottom sheet can hide. 417f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Params_behavior_hideable 418f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 419f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public boolean isHideable() { 420f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mHideable; 421f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 422f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 423f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 4244df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * Sets a callback to be notified of bottom sheet events. 425f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * 4264df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki * @param callback The callback to notify when bottom sheet events occur. 427f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki */ 4284df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki public void setBottomSheetCallback(BottomSheetCallback callback) { 4294df3c15e330c2f9730d3aa712f57befec8536dffYuichi Araki mCallback = callback; 430f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 431f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 432f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 433452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Sets the state of the bottom sheet. The bottom sheet will transition to that state with 434452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * animation. 435452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 436f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * @param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or 437f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki * {@link #STATE_HIDDEN}. 438452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 439452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final void setState(@State int state) { 440452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki V child = mViewRef.get(); 441452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (child == null) { 442452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 443452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 444452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 445452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == STATE_COLLAPSED) { 446452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 447452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else if (state == STATE_EXPANDED) { 448452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 449f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && state == STATE_HIDDEN) { 450f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 451452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 452452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("Illegal state argument: " + state); 453452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 454452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_SETTLING); 455452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { 456452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(child, new SettleRunnable(child, state)); 457452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 458452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 459452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 460452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki /** 461452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * Gets the current state of the bottom sheet. 462452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 463452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return One of {@link #STATE_EXPANDED}, {@link #STATE_COLLAPSED}, {@link #STATE_DRAGGING}, 464452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * and {@link #STATE_SETTLING}. 465452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 466452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 467452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public final int getState() { 468452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return mState; 469452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 470452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 471452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private void setStateInternal(@State int state) { 472452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mState == state) { 473452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return; 474452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 475452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mState = state; 476dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 477dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 478dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onStateChanged(bottomSheet, state); 479f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 480f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 481f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 482e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private void reset() { 483e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mActivePointerId = ViewDragHelper.INVALID_POINTER; 484e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mVelocityTracker != null) { 485e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.recycle(); 486e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker = null; 487e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 488e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 489e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 490f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private boolean shouldHide(View child, float yvel) { 491f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (child.getTop() < mMaxOffset) { 492f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki // It should not hide, but collapse. 493f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return false; 494f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 495f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki final float newTop = child.getTop() + yvel * HIDE_FRICTION; 496f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return Math.abs(newTop - mMaxOffset) / (float) mPeekHeight > HIDE_THRESHOLD; 497f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 498f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 4999aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki private View findScrollingChild(View view) { 5009aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof NestedScrollingChild) { 5019aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return view; 5029aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5039aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (view instanceof ViewGroup) { 5049aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki ViewGroup group = (ViewGroup) view; 5059aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki for (int i = 0, count = group.getChildCount(); i < count; i++) { 5069aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scrollingChild = findScrollingChild(group.getChildAt(i)); 5079aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scrollingChild != null) { 5089aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return scrollingChild; 5099aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5109aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5119aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5129aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return null; 513452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 514452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 515e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki private float getYVelocity() { 516e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 517e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId); 518e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 519e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki 520452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final ViewDragHelper.Callback mDragCallback = new ViewDragHelper.Callback() { 521452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 522452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 523452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public boolean tryCaptureView(View child, int pointerId) { 524e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_DRAGGING) { 525e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki return false; 526e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki } 527b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki if (mTouchingScrollingChild) { 528b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki return false; 529b1eb1357ec33343b7271a6d3876ac4af84e15510Yuichi Araki } 530e3e7063749d095bba8743cad0aeb7164a567890dYuichi Araki if (mState == STATE_EXPANDED && mActivePointerId == pointerId) { 5319aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki View scroll = mNestedScrollingChildRef.get(); 5329aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (scroll != null && ViewCompat.canScrollVertically(scroll, -1)) { 5339aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki // Let the content scroll up 5349aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return false; 5359aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 5369aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 537f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return mViewRef != null && mViewRef.get() == child; 538f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 539f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 540f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki @Override 541f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { 542f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki dispatchOnSlide(top); 543452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 544452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 545452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 546452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewDragStateChanged(int state) { 547452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (state == ViewDragHelper.STATE_DRAGGING) { 548452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(STATE_DRAGGING); 549452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 550452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 551452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 552452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 553452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void onViewReleased(View releasedChild, float xvel, float yvel) { 554452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki int top; 555452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State int targetState; 556f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (yvel < 0) { // Moving up 557452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMinOffset; 558452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_EXPANDED; 559f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else if (mHideable && shouldHide(releasedChild, yvel)) { 560f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki top = mParentHeight; 561f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki targetState = STATE_HIDDEN; 56249a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else if (yvel == 0.f) { 56349a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki int currentTop = releasedChild.getTop(); 56449a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { 56549a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMinOffset; 56649a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_EXPANDED; 56749a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } else { 56849a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki top = mMaxOffset; 56949a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki targetState = STATE_COLLAPSED; 57049a5904a773a7cfac127c5938671ed078d8ec8f3Yuichi Araki } 571452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 572452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki top = mMaxOffset; 573452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki targetState = STATE_COLLAPSED; 574452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 575452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top)) { 576f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(STATE_SETTLING); 577452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(releasedChild, 578452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki new SettleRunnable(releasedChild, targetState)); 579f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 580f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki setStateInternal(targetState); 581452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 582452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 583452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 584452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 585452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionVertical(View child, int top, int dy) { 586f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki return MathUtils.constrain(top, mMinOffset, mHideable ? mParentHeight : mMaxOffset); 587452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 588452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 589452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 590452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public int clampViewPositionHorizontal(View child, int left, int dx) { 591452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return child.getLeft(); 592452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 593f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 5949aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki @Override 5959aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki public int getViewVerticalDragRange(View child) { 5969aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki if (mHideable) { 5979aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mParentHeight - mMinOffset; 5989aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } else { 5999aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki return mMaxOffset - mMinOffset; 6009aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 6019aec720809a123c6193304730acf8b55d6ce5a7aYuichi Araki } 602452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki }; 603452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 604f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki private void dispatchOnSlide(int top) { 605dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki View bottomSheet = mViewRef.get(); 606dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki if (bottomSheet != null && mCallback != null) { 607f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki if (top > mMaxOffset) { 608dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onSlide(bottomSheet, (float) (mMaxOffset - top) / mPeekHeight); 609f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } else { 610dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki mCallback.onSlide(bottomSheet, 611dffd8d4be91b2e5e0ce66ad96867182db0c02fd0Yuichi Araki (float) (mMaxOffset - top) / ((mMaxOffset - mMinOffset))); 612f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 613f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 614f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki } 615f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki 616452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private class SettleRunnable implements Runnable { 617452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 618452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final View mView; 619452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 620452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 621452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki private final int mTargetState; 622452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 623452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki SettleRunnable(View view, @State int targetState) { 624452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mView = view; 625452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki mTargetState = targetState; 626452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 627452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 628452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 629452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void run() { 630452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) { 631452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewCompat.postOnAnimation(mView, this); 632452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } else { 633452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki setStateInternal(mTargetState); 634452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 635452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 636452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 637452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 638452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki protected static class SavedState extends View.BaseSavedState { 639452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 640452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @State 641452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki final int state; 642452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 643452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcel source) { 644452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(source); 645452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki //noinspection ResourceType 646452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki state = source.readInt(); 647452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 648452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 649452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState(Parcelable superState, @State int state) { 650452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super(superState); 651452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki this.state = state; 652452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 653452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 654452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 655452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public void writeToParcel(Parcel out, int flags) { 656452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki super.writeToParcel(out, flags); 657452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki out.writeInt(state); 658452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 659452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 660452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static final Parcelable.Creator<SavedState> CREATOR = 661452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki new Parcelable.Creator<SavedState>() { 662452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 663452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState createFromParcel(Parcel source) { 664452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState(source); 665452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 666452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 667452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @Override 668452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public SavedState[] newArray(int size) { 669452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return new SavedState[size]; 670452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 671452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki }; 672452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 673452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 674f28a0f76c7a46d61785ef7cbc407c19942ecab46Yuichi Araki /** 675452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * A utility function to get the {@link BottomSheetBehavior} associated with the {@code view}. 676452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * 677452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @param view The {@link View} with {@link BottomSheetBehavior}. 678452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki * @return The {@link BottomSheetBehavior} associated with the {@code view}. 679452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki */ 680452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki @SuppressWarnings("unchecked") 681452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki public static <V extends View> BottomSheetBehavior<V> from(V view) { 682452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki ViewGroup.LayoutParams params = view.getLayoutParams(); 683452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(params instanceof CoordinatorLayout.LayoutParams)) { 684452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException("The view is not a child of CoordinatorLayout"); 685452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 686452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) params) 687452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki .getBehavior(); 688452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki if (!(behavior instanceof BottomSheetBehavior)) { 689452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki throw new IllegalArgumentException( 690452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki "The view is not associated with BottomSheetBehavior"); 691452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 692452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki return (BottomSheetBehavior<V>) behavior; 693452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki } 694452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki 695452f94d1c58e2a7476019b98c3bf0e4b322d1525Yuichi Araki} 696