diff options
Diffstat (limited to 'android/support/design/widget/BottomSheetBehavior.java')
| -rw-r--r-- | android/support/design/widget/BottomSheetBehavior.java | 829 |
1 files changed, 0 insertions, 829 deletions
diff --git a/android/support/design/widget/BottomSheetBehavior.java b/android/support/design/widget/BottomSheetBehavior.java deleted file mode 100644 index 00ce8f90..00000000 --- a/android/support/design/widget/BottomSheetBehavior.java +++ /dev/null @@ -1,829 +0,0 @@ -/* - * Copyright (C) 2015 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package android.support.design.widget; - -import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP; - -import android.content.Context; -import android.content.res.TypedArray; -import android.os.Parcel; -import android.os.Parcelable; -import android.support.annotation.IntDef; -import android.support.annotation.NonNull; -import android.support.annotation.RestrictTo; -import android.support.annotation.VisibleForTesting; -import android.support.design.R; -import android.support.v4.math.MathUtils; -import android.support.v4.view.AbsSavedState; -import android.support.v4.view.ViewCompat; -import android.support.v4.widget.ViewDragHelper; -import android.util.AttributeSet; -import android.util.TypedValue; -import android.view.MotionEvent; -import android.view.VelocityTracker; -import android.view.View; -import android.view.ViewConfiguration; -import android.view.ViewGroup; -import android.view.ViewParent; - -import java.lang.annotation.Retention; -import java.lang.annotation.RetentionPolicy; -import java.lang.ref.WeakReference; - - -/** - * An interaction behavior plugin for a child view of {@link CoordinatorLayout} to make it work as - * a bottom sheet. - */ -public class BottomSheetBehavior<V extends View> extends CoordinatorLayout.Behavior<V> { - - /** - * Callback for monitoring events about bottom sheets. - */ - public abstract static class BottomSheetCallback { - - /** - * Called when the bottom sheet changes its state. - * - * @param bottomSheet The bottom sheet view. - * @param newState The new state. This will be one of {@link #STATE_DRAGGING}, - * {@link #STATE_SETTLING}, {@link #STATE_EXPANDED}, - * {@link #STATE_COLLAPSED}, or {@link #STATE_HIDDEN}. - */ - public abstract void onStateChanged(@NonNull View bottomSheet, @State int newState); - - /** - * Called when the bottom sheet is being dragged. - * - * @param bottomSheet The bottom sheet view. - * @param slideOffset The new offset of this bottom sheet within [-1,1] range. Offset - * increases as this bottom sheet is moving upward. From 0 to 1 the sheet - * is between collapsed and expanded states and from -1 to 0 it is - * between hidden and collapsed states. - */ - public abstract void onSlide(@NonNull View bottomSheet, float slideOffset); - } - - /** - * The bottom sheet is dragging. - */ - public static final int STATE_DRAGGING = 1; - - /** - * The bottom sheet is settling. - */ - public static final int STATE_SETTLING = 2; - - /** - * The bottom sheet is expanded. - */ - public static final int STATE_EXPANDED = 3; - - /** - * The bottom sheet is collapsed. - */ - public static final int STATE_COLLAPSED = 4; - - /** - * The bottom sheet is hidden. - */ - public static final int STATE_HIDDEN = 5; - - /** @hide */ - @RestrictTo(LIBRARY_GROUP) - @IntDef({STATE_EXPANDED, STATE_COLLAPSED, STATE_DRAGGING, STATE_SETTLING, STATE_HIDDEN}) - @Retention(RetentionPolicy.SOURCE) - public @interface State {} - - /** - * Peek at the 16:9 ratio keyline of its parent. - * - * <p>This can be used as a parameter for {@link #setPeekHeight(int)}. - * {@link #getPeekHeight()} will return this when the value is set.</p> - */ - public static final int PEEK_HEIGHT_AUTO = -1; - - private static final float HIDE_THRESHOLD = 0.5f; - - private static final float HIDE_FRICTION = 0.1f; - - private float mMaximumVelocity; - - private int mPeekHeight; - - private boolean mPeekHeightAuto; - - private int mPeekHeightMin; - - int mMinOffset; - - int mMaxOffset; - - boolean mHideable; - - private boolean mSkipCollapsed; - - @State - int mState = STATE_COLLAPSED; - - ViewDragHelper mViewDragHelper; - - private boolean mIgnoreEvents; - - private int mLastNestedScrollDy; - - private boolean mNestedScrolled; - - int mParentHeight; - - WeakReference<V> mViewRef; - - WeakReference<View> mNestedScrollingChildRef; - - private BottomSheetCallback mCallback; - - private VelocityTracker mVelocityTracker; - - int mActivePointerId; - - private int mInitialY; - - boolean mTouchingScrollingChild; - - /** - * Default constructor for instantiating BottomSheetBehaviors. - */ - public BottomSheetBehavior() { - } - - /** - * Default constructor for inflating BottomSheetBehaviors from layout. - * - * @param context The {@link Context}. - * @param attrs The {@link AttributeSet}. - */ - public BottomSheetBehavior(Context context, AttributeSet attrs) { - super(context, attrs); - TypedArray a = context.obtainStyledAttributes(attrs, - R.styleable.BottomSheetBehavior_Layout); - TypedValue value = a.peekValue(R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight); - if (value != null && value.data == PEEK_HEIGHT_AUTO) { - setPeekHeight(value.data); - } else { - setPeekHeight(a.getDimensionPixelSize( - R.styleable.BottomSheetBehavior_Layout_behavior_peekHeight, PEEK_HEIGHT_AUTO)); - } - setHideable(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_hideable, false)); - setSkipCollapsed(a.getBoolean(R.styleable.BottomSheetBehavior_Layout_behavior_skipCollapsed, - false)); - a.recycle(); - ViewConfiguration configuration = ViewConfiguration.get(context); - mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); - } - - @Override - public Parcelable onSaveInstanceState(CoordinatorLayout parent, V child) { - return new SavedState(super.onSaveInstanceState(parent, child), mState); - } - - @Override - public void onRestoreInstanceState(CoordinatorLayout parent, V child, Parcelable state) { - SavedState ss = (SavedState) state; - super.onRestoreInstanceState(parent, child, ss.getSuperState()); - // Intermediate states are restored as collapsed state - if (ss.state == STATE_DRAGGING || ss.state == STATE_SETTLING) { - mState = STATE_COLLAPSED; - } else { - mState = ss.state; - } - } - - @Override - public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) { - if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) { - ViewCompat.setFitsSystemWindows(child, true); - } - int savedTop = child.getTop(); - // First let the parent lay it out - parent.onLayoutChild(child, layoutDirection); - // Offset the bottom sheet - mParentHeight = parent.getHeight(); - int peekHeight; - if (mPeekHeightAuto) { - if (mPeekHeightMin == 0) { - mPeekHeightMin = parent.getResources().getDimensionPixelSize( - R.dimen.design_bottom_sheet_peek_height_min); - } - peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16); - } else { - peekHeight = mPeekHeight; - } - mMinOffset = Math.max(0, mParentHeight - child.getHeight()); - mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset); - if (mState == STATE_EXPANDED) { - ViewCompat.offsetTopAndBottom(child, mMinOffset); - } else if (mHideable && mState == STATE_HIDDEN) { - ViewCompat.offsetTopAndBottom(child, mParentHeight); - } else if (mState == STATE_COLLAPSED) { - ViewCompat.offsetTopAndBottom(child, mMaxOffset); - } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) { - ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop()); - } - if (mViewDragHelper == null) { - mViewDragHelper = ViewDragHelper.create(parent, mDragCallback); - } - mViewRef = new WeakReference<>(child); - mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child)); - return true; - } - - @Override - public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { - if (!child.isShown()) { - mIgnoreEvents = true; - return false; - } - int action = event.getActionMasked(); - // Record the velocity - if (action == MotionEvent.ACTION_DOWN) { - reset(); - } - if (mVelocityTracker == null) { - mVelocityTracker = VelocityTracker.obtain(); - } - mVelocityTracker.addMovement(event); - switch (action) { - case MotionEvent.ACTION_UP: - case MotionEvent.ACTION_CANCEL: - mTouchingScrollingChild = false; - mActivePointerId = MotionEvent.INVALID_POINTER_ID; - // Reset the ignore flag - if (mIgnoreEvents) { - mIgnoreEvents = false; - return false; - } - break; - case MotionEvent.ACTION_DOWN: - int initialX = (int) event.getX(); - mInitialY = (int) event.getY(); - View scroll = mNestedScrollingChildRef != null - ? mNestedScrollingChildRef.get() : null; - if (scroll != null && parent.isPointInChildBounds(scroll, initialX, mInitialY)) { - mActivePointerId = event.getPointerId(event.getActionIndex()); - mTouchingScrollingChild = true; - } - mIgnoreEvents = mActivePointerId == MotionEvent.INVALID_POINTER_ID && - !parent.isPointInChildBounds(child, initialX, mInitialY); - break; - } - if (!mIgnoreEvents && mViewDragHelper.shouldInterceptTouchEvent(event)) { - return true; - } - // We have to handle cases that the ViewDragHelper does not capture the bottom sheet because - // it is not the top most view of its parent. This is not necessary when the touch event is - // happening over the scrolling content as nested scrolling logic handles that case. - View scroll = mNestedScrollingChildRef.get(); - return action == MotionEvent.ACTION_MOVE && scroll != null && - !mIgnoreEvents && mState != STATE_DRAGGING && - !parent.isPointInChildBounds(scroll, (int) event.getX(), (int) event.getY()) && - Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop(); - } - - @Override - public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) { - if (!child.isShown()) { - return false; - } - int action = event.getActionMasked(); - if (mState == STATE_DRAGGING && action == MotionEvent.ACTION_DOWN) { - return true; - } - if (mViewDragHelper != null) { - mViewDragHelper.processTouchEvent(event); - } - // Record the velocity - if (action == MotionEvent.ACTION_DOWN) { - reset(); - } - if (mVelocityTracker == null) { - mVelocityTracker = VelocityTracker.obtain(); - } - mVelocityTracker.addMovement(event); - // The ViewDragHelper tries to capture only the top-most View. We have to explicitly tell it - // to capture the bottom sheet in case it is not captured and the touch slop is passed. - if (action == MotionEvent.ACTION_MOVE && !mIgnoreEvents) { - if (Math.abs(mInitialY - event.getY()) > mViewDragHelper.getTouchSlop()) { - mViewDragHelper.captureChildView(child, event.getPointerId(event.getActionIndex())); - } - } - return !mIgnoreEvents; - } - - @Override - public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, - View directTargetChild, View target, int nestedScrollAxes) { - mLastNestedScrollDy = 0; - mNestedScrolled = false; - return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0; - } - - @Override - public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, - int dy, int[] consumed) { - View scrollingChild = mNestedScrollingChildRef.get(); - if (target != scrollingChild) { - return; - } - int currentTop = child.getTop(); - int newTop = currentTop - dy; - if (dy > 0) { // Upward - if (newTop < mMinOffset) { - consumed[1] = currentTop - mMinOffset; - ViewCompat.offsetTopAndBottom(child, -consumed[1]); - setStateInternal(STATE_EXPANDED); - } else { - consumed[1] = dy; - ViewCompat.offsetTopAndBottom(child, -dy); - setStateInternal(STATE_DRAGGING); - } - } else if (dy < 0) { // Downward - if (!target.canScrollVertically(-1)) { - if (newTop <= mMaxOffset || mHideable) { - consumed[1] = dy; - ViewCompat.offsetTopAndBottom(child, -dy); - setStateInternal(STATE_DRAGGING); - } else { - consumed[1] = currentTop - mMaxOffset; - ViewCompat.offsetTopAndBottom(child, -consumed[1]); - setStateInternal(STATE_COLLAPSED); - } - } - } - dispatchOnSlide(child.getTop()); - mLastNestedScrollDy = dy; - mNestedScrolled = true; - } - - @Override - public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) { - if (child.getTop() == mMinOffset) { - setStateInternal(STATE_EXPANDED); - return; - } - if (mNestedScrollingChildRef == null || target != mNestedScrollingChildRef.get() - || !mNestedScrolled) { - return; - } - int top; - int targetState; - if (mLastNestedScrollDy > 0) { - top = mMinOffset; - targetState = STATE_EXPANDED; - } else if (mHideable && shouldHide(child, getYVelocity())) { - top = mParentHeight; - targetState = STATE_HIDDEN; - } else if (mLastNestedScrollDy == 0) { - int currentTop = child.getTop(); - if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { - top = mMinOffset; - targetState = STATE_EXPANDED; - } else { - top = mMaxOffset; - targetState = STATE_COLLAPSED; - } - } else { - top = mMaxOffset; - targetState = STATE_COLLAPSED; - } - if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { - setStateInternal(STATE_SETTLING); - ViewCompat.postOnAnimation(child, new SettleRunnable(child, targetState)); - } else { - setStateInternal(targetState); - } - mNestedScrolled = false; - } - - @Override - public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target, - float velocityX, float velocityY) { - return target == mNestedScrollingChildRef.get() && - (mState != STATE_EXPANDED || - super.onNestedPreFling(coordinatorLayout, child, target, - velocityX, velocityY)); - } - - /** - * Sets the height of the bottom sheet when it is collapsed. - * - * @param peekHeight The height of the collapsed bottom sheet in pixels, or - * {@link #PEEK_HEIGHT_AUTO} to configure the sheet to peek automatically - * at 16:9 ratio keyline. - * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight - */ - public final void setPeekHeight(int peekHeight) { - boolean layout = false; - if (peekHeight == PEEK_HEIGHT_AUTO) { - if (!mPeekHeightAuto) { - mPeekHeightAuto = true; - layout = true; - } - } else if (mPeekHeightAuto || mPeekHeight != peekHeight) { - mPeekHeightAuto = false; - mPeekHeight = Math.max(0, peekHeight); - mMaxOffset = mParentHeight - peekHeight; - layout = true; - } - if (layout && mState == STATE_COLLAPSED && mViewRef != null) { - V view = mViewRef.get(); - if (view != null) { - view.requestLayout(); - } - } - } - - /** - * Gets the height of the bottom sheet when it is collapsed. - * - * @return The height of the collapsed bottom sheet in pixels, or {@link #PEEK_HEIGHT_AUTO} - * if the sheet is configured to peek automatically at 16:9 ratio keyline - * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_peekHeight - */ - public final int getPeekHeight() { - return mPeekHeightAuto ? PEEK_HEIGHT_AUTO : mPeekHeight; - } - - /** - * Sets whether this bottom sheet can hide when it is swiped down. - * - * @param hideable {@code true} to make this bottom sheet hideable. - * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable - */ - public void setHideable(boolean hideable) { - mHideable = hideable; - } - - /** - * Gets whether this bottom sheet can hide when it is swiped down. - * - * @return {@code true} if this bottom sheet can hide. - * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_hideable - */ - public boolean isHideable() { - return mHideable; - } - - /** - * Sets whether this bottom sheet should skip the collapsed state when it is being hidden - * after it is expanded once. Setting this to true has no effect unless the sheet is hideable. - * - * @param skipCollapsed True if the bottom sheet should skip the collapsed state. - * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed - */ - public void setSkipCollapsed(boolean skipCollapsed) { - mSkipCollapsed = skipCollapsed; - } - - /** - * Sets whether this bottom sheet should skip the collapsed state when it is being hidden - * after it is expanded once. - * - * @return Whether the bottom sheet should skip the collapsed state. - * @attr ref android.support.design.R.styleable#BottomSheetBehavior_Layout_behavior_skipCollapsed - */ - public boolean getSkipCollapsed() { - return mSkipCollapsed; - } - - /** - * Sets a callback to be notified of bottom sheet events. - * - * @param callback The callback to notify when bottom sheet events occur. - */ - public void setBottomSheetCallback(BottomSheetCallback callback) { - mCallback = callback; - } - - /** - * Sets the state of the bottom sheet. The bottom sheet will transition to that state with - * animation. - * - * @param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or - * {@link #STATE_HIDDEN}. - */ - public final void setState(final @State int state) { - if (state == mState) { - return; - } - if (mViewRef == null) { - // The view is not laid out yet; modify mState and let onLayoutChild handle it later - if (state == STATE_COLLAPSED || state == STATE_EXPANDED || - (mHideable && state == STATE_HIDDEN)) { - mState = state; - } - return; - } - final V child = mViewRef.get(); - if (child == null) { - return; - } - // Start the animation; wait until a pending layout if there is one. - ViewParent parent = child.getParent(); - if (parent != null && parent.isLayoutRequested() && ViewCompat.isAttachedToWindow(child)) { - child.post(new Runnable() { - @Override - public void run() { - startSettlingAnimation(child, state); - } - }); - } else { - startSettlingAnimation(child, state); - } - } - - /** - * Gets the current state of the bottom sheet. - * - * @return One of {@link #STATE_EXPANDED}, {@link #STATE_COLLAPSED}, {@link #STATE_DRAGGING}, - * {@link #STATE_SETTLING}, and {@link #STATE_HIDDEN}. - */ - @State - public final int getState() { - return mState; - } - - void setStateInternal(@State int state) { - if (mState == state) { - return; - } - mState = state; - View bottomSheet = mViewRef.get(); - if (bottomSheet != null && mCallback != null) { - mCallback.onStateChanged(bottomSheet, state); - } - } - - private void reset() { - mActivePointerId = ViewDragHelper.INVALID_POINTER; - if (mVelocityTracker != null) { - mVelocityTracker.recycle(); - mVelocityTracker = null; - } - } - - boolean shouldHide(View child, float yvel) { - if (mSkipCollapsed) { - return true; - } - if (child.getTop() < mMaxOffset) { - // It should not hide, but collapse. - return false; - } - final float newTop = child.getTop() + yvel * HIDE_FRICTION; - return Math.abs(newTop - mMaxOffset) / (float) mPeekHeight > HIDE_THRESHOLD; - } - - @VisibleForTesting - View findScrollingChild(View view) { - if (ViewCompat.isNestedScrollingEnabled(view)) { - return view; - } - if (view instanceof ViewGroup) { - ViewGroup group = (ViewGroup) view; - for (int i = 0, count = group.getChildCount(); i < count; i++) { - View scrollingChild = findScrollingChild(group.getChildAt(i)); - if (scrollingChild != null) { - return scrollingChild; - } - } - } - return null; - } - - private float getYVelocity() { - mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); - return mVelocityTracker.getYVelocity(mActivePointerId); - } - - void startSettlingAnimation(View child, int state) { - int top; - if (state == STATE_COLLAPSED) { - top = mMaxOffset; - } else if (state == STATE_EXPANDED) { - top = mMinOffset; - } else if (mHideable && state == STATE_HIDDEN) { - top = mParentHeight; - } else { - throw new IllegalArgumentException("Illegal state argument: " + state); - } - if (mViewDragHelper.smoothSlideViewTo(child, child.getLeft(), top)) { - setStateInternal(STATE_SETTLING); - ViewCompat.postOnAnimation(child, new SettleRunnable(child, state)); - } else { - setStateInternal(state); - } - } - - private final ViewDragHelper.Callback mDragCallback = new ViewDragHelper.Callback() { - - @Override - public boolean tryCaptureView(View child, int pointerId) { - if (mState == STATE_DRAGGING) { - return false; - } - if (mTouchingScrollingChild) { - return false; - } - if (mState == STATE_EXPANDED && mActivePointerId == pointerId) { - View scroll = mNestedScrollingChildRef.get(); - if (scroll != null && scroll.canScrollVertically(-1)) { - // Let the content scroll up - return false; - } - } - return mViewRef != null && mViewRef.get() == child; - } - - @Override - public void onViewPositionChanged(View changedView, int left, int top, int dx, int dy) { - dispatchOnSlide(top); - } - - @Override - public void onViewDragStateChanged(int state) { - if (state == ViewDragHelper.STATE_DRAGGING) { - setStateInternal(STATE_DRAGGING); - } - } - - @Override - public void onViewReleased(View releasedChild, float xvel, float yvel) { - int top; - @State int targetState; - if (yvel < 0) { // Moving up - top = mMinOffset; - targetState = STATE_EXPANDED; - } else if (mHideable && shouldHide(releasedChild, yvel)) { - top = mParentHeight; - targetState = STATE_HIDDEN; - } else if (yvel == 0.f) { - int currentTop = releasedChild.getTop(); - if (Math.abs(currentTop - mMinOffset) < Math.abs(currentTop - mMaxOffset)) { - top = mMinOffset; - targetState = STATE_EXPANDED; - } else { - top = mMaxOffset; - targetState = STATE_COLLAPSED; - } - } else { - top = mMaxOffset; - targetState = STATE_COLLAPSED; - } - if (mViewDragHelper.settleCapturedViewAt(releasedChild.getLeft(), top)) { - setStateInternal(STATE_SETTLING); - ViewCompat.postOnAnimation(releasedChild, - new SettleRunnable(releasedChild, targetState)); - } else { - setStateInternal(targetState); - } - } - - @Override - public int clampViewPositionVertical(View child, int top, int dy) { - return MathUtils.clamp(top, mMinOffset, mHideable ? mParentHeight : mMaxOffset); - } - - @Override - public int clampViewPositionHorizontal(View child, int left, int dx) { - return child.getLeft(); - } - - @Override - public int getViewVerticalDragRange(View child) { - if (mHideable) { - return mParentHeight - mMinOffset; - } else { - return mMaxOffset - mMinOffset; - } - } - }; - - void dispatchOnSlide(int top) { - View bottomSheet = mViewRef.get(); - if (bottomSheet != null && mCallback != null) { - if (top > mMaxOffset) { - mCallback.onSlide(bottomSheet, (float) (mMaxOffset - top) / - (mParentHeight - mMaxOffset)); - } else { - mCallback.onSlide(bottomSheet, - (float) (mMaxOffset - top) / ((mMaxOffset - mMinOffset))); - } - } - } - - @VisibleForTesting - int getPeekHeightMin() { - return mPeekHeightMin; - } - - private class SettleRunnable implements Runnable { - - private final View mView; - - @State - private final int mTargetState; - - SettleRunnable(View view, @State int targetState) { - mView = view; - mTargetState = targetState; - } - - @Override - public void run() { - if (mViewDragHelper != null && mViewDragHelper.continueSettling(true)) { - ViewCompat.postOnAnimation(mView, this); - } else { - setStateInternal(mTargetState); - } - } - } - - protected static class SavedState extends AbsSavedState { - @State - final int state; - - public SavedState(Parcel source) { - this(source, null); - } - - public SavedState(Parcel source, ClassLoader loader) { - super(source, loader); - //noinspection ResourceType - state = source.readInt(); - } - - public SavedState(Parcelable superState, @State int state) { - super(superState); - this.state = state; - } - - @Override - public void writeToParcel(Parcel out, int flags) { - super.writeToParcel(out, flags); - out.writeInt(state); - } - - public static final Creator<SavedState> CREATOR = new ClassLoaderCreator<SavedState>() { - @Override - public SavedState createFromParcel(Parcel in, ClassLoader loader) { - return new SavedState(in, loader); - } - - @Override - public SavedState createFromParcel(Parcel in) { - return new SavedState(in, null); - } - - @Override - public SavedState[] newArray(int size) { - return new SavedState[size]; - } - }; - } - - /** - * A utility function to get the {@link BottomSheetBehavior} associated with the {@code view}. - * - * @param view The {@link View} with {@link BottomSheetBehavior}. - * @return The {@link BottomSheetBehavior} associated with the {@code view}. - */ - @SuppressWarnings("unchecked") - public static <V extends View> BottomSheetBehavior<V> from(V view) { - ViewGroup.LayoutParams params = view.getLayoutParams(); - if (!(params instanceof CoordinatorLayout.LayoutParams)) { - throw new IllegalArgumentException("The view is not a child of CoordinatorLayout"); - } - CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) params) - .getBehavior(); - if (!(behavior instanceof BottomSheetBehavior)) { - throw new IllegalArgumentException( - "The view is not associated with BottomSheetBehavior"); - } - return (BottomSheetBehavior<V>) behavior; - } - -} |