/* * 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 com.google.android.material.snackbar; import com.google.android.material.R; import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP; import static com.google.android.material.animation.AnimationUtils.FAST_OUT_SLOW_IN_INTERPOLATOR; import static com.google.android.material.animation.AnimationUtils.LINEAR_INTERPOLATOR; import static com.google.android.material.animation.AnimationUtils.LINEAR_OUT_SLOW_IN_INTERPOLATOR; import static com.google.android.material.internal.ThemeEnforcement.createThemedContext; import android.accessibilityservice.AccessibilityServiceInfo; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.AnimatorSet; import android.animation.ValueAnimator; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.TypedArray; import android.graphics.drawable.Drawable; import android.graphics.drawable.GradientDrawable; import android.os.Build; import android.os.Build.VERSION_CODES; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import androidx.annotation.IdRes; import androidx.annotation.IntDef; import androidx.annotation.IntRange; import androidx.annotation.LayoutRes; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.annotation.RestrictTo; import com.google.android.material.behavior.SwipeDismissBehavior; import androidx.core.view.AccessibilityDelegateCompat; import androidx.core.view.ViewCompat; import androidx.core.view.accessibility.AccessibilityNodeInfoCompat; import android.util.AttributeSet; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.view.ViewGroup.MarginLayoutParams; import android.view.ViewParent; import android.view.accessibility.AccessibilityManager; import android.widget.FrameLayout; import androidx.coordinatorlayout.widget.CoordinatorLayout; import com.google.android.material.color.MaterialColors; import com.google.android.material.internal.ThemeEnforcement; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.util.ArrayList; import java.util.List; /** * Base class for lightweight transient bars that are displayed along the bottom edge of the * application window. * * @param The transient bottom bar subclass. */ public abstract class BaseTransientBottomBar> { /** Animation mode that corresponds to the slide in and out animations. */ public static final int ANIMATION_MODE_SLIDE = 0; /** Animation mode that corresponds to the fade in and out animations. */ public static final int ANIMATION_MODE_FADE = 1; /** Animation modes that can be set on the {@link BaseTransientBottomBar}. */ @IntDef({ANIMATION_MODE_SLIDE, ANIMATION_MODE_FADE}) @Retention(RetentionPolicy.SOURCE) public @interface AnimationMode {} /** * Base class for {@link BaseTransientBottomBar} callbacks. * * @param The transient bottom bar subclass. * @see BaseTransientBottomBar#addCallback(BaseCallback) */ public abstract static class BaseCallback { /** Indicates that the Snackbar was dismissed via a swipe. */ public static final int DISMISS_EVENT_SWIPE = 0; /** Indicates that the Snackbar was dismissed via an action click. */ public static final int DISMISS_EVENT_ACTION = 1; /** Indicates that the Snackbar was dismissed via a timeout. */ public static final int DISMISS_EVENT_TIMEOUT = 2; /** Indicates that the Snackbar was dismissed via a call to {@link #dismiss()}. */ public static final int DISMISS_EVENT_MANUAL = 3; /** Indicates that the Snackbar was dismissed from a new Snackbar being shown. */ public static final int DISMISS_EVENT_CONSECUTIVE = 4; /** @hide */ @RestrictTo(LIBRARY_GROUP) @IntDef({ DISMISS_EVENT_SWIPE, DISMISS_EVENT_ACTION, DISMISS_EVENT_TIMEOUT, DISMISS_EVENT_MANUAL, DISMISS_EVENT_CONSECUTIVE }) @Retention(RetentionPolicy.SOURCE) public @interface DismissEvent {} /** * Called when the given {@link BaseTransientBottomBar} has been dismissed, either through a * time-out, having been manually dismissed, or an action being clicked. * * @param transientBottomBar The transient bottom bar which has been dismissed. * @param event The event which caused the dismissal. One of either: {@link * #DISMISS_EVENT_SWIPE}, {@link #DISMISS_EVENT_ACTION}, {@link #DISMISS_EVENT_TIMEOUT}, * {@link #DISMISS_EVENT_MANUAL} or {@link #DISMISS_EVENT_CONSECUTIVE}. * @see BaseTransientBottomBar#dismiss() */ public void onDismissed(B transientBottomBar, @DismissEvent int event) { // empty } /** * Called when the given {@link BaseTransientBottomBar} is visible. * * @param transientBottomBar The transient bottom bar which is now visible. * @see BaseTransientBottomBar#show() */ public void onShown(B transientBottomBar) { // empty } } /** * Interface that defines the behavior of the main content of a transient bottom bar. * * @deprecated Use {@link com.google.android.material.snackbar.ContentViewCallback} instead. */ @Deprecated public interface ContentViewCallback extends com.google.android.material.snackbar.ContentViewCallback {} /** @hide */ @RestrictTo(LIBRARY_GROUP) @IntDef({LENGTH_INDEFINITE, LENGTH_SHORT, LENGTH_LONG}) @IntRange(from = 1) @Retention(RetentionPolicy.SOURCE) public @interface Duration {} /** * Show the Snackbar indefinitely. This means that the Snackbar will be displayed from the time * that is {@link #show() shown} until either it is dismissed, or another Snackbar is shown. * * @see #setDuration */ public static final int LENGTH_INDEFINITE = -2; /** * Show the Snackbar for a short period of time. * * @see #setDuration */ public static final int LENGTH_SHORT = -1; /** * Show the Snackbar for a long period of time. * * @see #setDuration */ public static final int LENGTH_LONG = 0; // Legacy slide animation duration constant. static final int ANIMATION_DURATION = 250; // Legacy slide animation content fade duration constant. static final int ANIMATION_FADE_DURATION = 180; // Fade and scale animation constants. private static final int ANIMATION_FADE_IN_DURATION = 150; private static final int ANIMATION_FADE_OUT_DURATION = 75; private static final float ANIMATION_SCALE_FROM_VALUE = 0.8f; static final Handler handler; static final int MSG_SHOW = 0; static final int MSG_DISMISS = 1; // On JB/KK versions of the platform sometimes View.setTranslationY does not result in // layout / draw pass, and CoordinatorLayout relies on a draw pass to happen to sync vertical // positioning of all its child views private static final boolean USE_OFFSET_API = (Build.VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN) && (Build.VERSION.SDK_INT <= VERSION_CODES.KITKAT); private static final int[] SNACKBAR_STYLE_ATTR = new int[] {R.attr.snackbarStyle}; static { handler = new Handler( Looper.getMainLooper(), message -> { switch (message.what) { case MSG_SHOW: ((BaseTransientBottomBar) message.obj).showView(); return true; case MSG_DISMISS: ((BaseTransientBottomBar) message.obj).hideView(message.arg1); return true; default: return false; } }); } private final ViewGroup targetParent; private final Context context; protected final SnackbarBaseLayout view; private final com.google.android.material.snackbar.ContentViewCallback contentViewCallback; private int duration; @Nullable private View anchorView; private final int originalBottomMargin; private int extraBottomMarginInsets; private int extraBottomMarginAnchorView; private List> callbacks; private BaseTransientBottomBar.Behavior behavior; private final AccessibilityManager accessibilityManager; /** @hide */ // TODO: make package private after the widget migration is finished @RestrictTo(LIBRARY_GROUP) protected interface OnLayoutChangeListener { void onLayoutChange(View view, int left, int top, int right, int bottom); } /** @hide */ // TODO: make package private after the widget migration is finished @RestrictTo(LIBRARY_GROUP) protected interface OnAttachStateChangeListener { void onViewAttachedToWindow(View v); void onViewDetachedFromWindow(View v); } /** * Constructor for the transient bottom bar. * * @param parent The parent for this transient bottom bar. * @param content The content view for this transient bottom bar. * @param contentViewCallback The content view callback for this transient bottom bar. */ protected BaseTransientBottomBar( @NonNull ViewGroup parent, @NonNull View content, @NonNull com.google.android.material.snackbar.ContentViewCallback contentViewCallback) { if (parent == null) { throw new IllegalArgumentException("Transient bottom bar must have non-null parent"); } if (content == null) { throw new IllegalArgumentException("Transient bottom bar must have non-null content"); } if (contentViewCallback == null) { throw new IllegalArgumentException("Transient bottom bar must have non-null callback"); } targetParent = parent; this.contentViewCallback = contentViewCallback; context = parent.getContext(); ThemeEnforcement.checkAppCompatTheme(context); LayoutInflater inflater = LayoutInflater.from(context); // Note that for backwards compatibility reasons we inflate a layout that is defined // in the extending Snackbar class. This is to prevent breakage of apps that have custom // coordinator layout behaviors that depend on that layout. view = (SnackbarBaseLayout) inflater.inflate(getSnackbarBaseLayoutResId(), targetParent, false); if (view.getBackground() == null) { ViewCompat.setBackground(view, createThemedBackground()); } if (content instanceof SnackbarContentLayout) { ((SnackbarContentLayout) content) .updateActionTextColorAlphaIfNeeded(view.getActionTextColorAlpha()); } view.addView(content); originalBottomMargin = ((MarginLayoutParams) view.getLayoutParams()).bottomMargin; ViewCompat.setAccessibilityLiveRegion(view, ViewCompat.ACCESSIBILITY_LIVE_REGION_POLITE); ViewCompat.setImportantForAccessibility(view, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES); // Make sure that we fit system windows and have a listener to apply any insets ViewCompat.setFitsSystemWindows(view, true); ViewCompat.setOnApplyWindowInsetsListener( view, (v, insets) -> { // Copy over the bottom inset as bottom margin so that we're displayed above the // navigation bar. extraBottomMarginInsets = insets.getSystemWindowInsetBottom(); updateBottomMargin(); return insets; }); // Handle accessibility events ViewCompat.setAccessibilityDelegate( view, new AccessibilityDelegateCompat() { @Override public void onInitializeAccessibilityNodeInfo( View host, AccessibilityNodeInfoCompat info) { super.onInitializeAccessibilityNodeInfo(host, info); info.addAction(AccessibilityNodeInfoCompat.ACTION_DISMISS); info.setDismissable(true); } @Override public boolean performAccessibilityAction(View host, int action, Bundle args) { if (action == AccessibilityNodeInfoCompat.ACTION_DISMISS) { dismiss(); return true; } return super.performAccessibilityAction(host, action, args); } }); accessibilityManager = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE); } private Drawable createThemedBackground() { int backgroundColor = MaterialColors.layer( view, R.attr.colorSurface, R.attr.colorOnSurface, view.getBackgroundOverlayColorAlpha()); float cornerRadius = view.getResources().getDimension(R.dimen.mtrl_snackbar_background_corner_radius); GradientDrawable background = new GradientDrawable(); background.setShape(GradientDrawable.RECTANGLE); background.setColor(backgroundColor); background.setCornerRadius(cornerRadius); return background; } private void updateBottomMargin() { MarginLayoutParams layoutParams = (MarginLayoutParams) view.getLayoutParams(); layoutParams.bottomMargin = originalBottomMargin; if (anchorView != null) { layoutParams.bottomMargin += extraBottomMarginAnchorView; } else { layoutParams.bottomMargin += extraBottomMarginInsets; } view.setLayoutParams(layoutParams); } @LayoutRes protected int getSnackbarBaseLayoutResId() { return hasSnackbarStyleAttr() ? R.layout.mtrl_layout_snackbar : R.layout.design_layout_snackbar; } /** * {@link Snackbar}s should still work with AppCompat themes, which don't specify a {@code * snackbarStyle}. This method helps to check if a valid {@code snackbarStyle} is set within the * current context, so that we know whether we can use the attribute. */ protected boolean hasSnackbarStyleAttr() { TypedArray a = context.obtainStyledAttributes(SNACKBAR_STYLE_ATTR); int snackbarStyleResId = a.getResourceId(0, -1); a.recycle(); return snackbarStyleResId != -1; } /** * Set how long to show the view for. * * @param duration How long to display the message. Can be {@link #LENGTH_SHORT}, {@link * #LENGTH_LONG}, {@link #LENGTH_INDEFINITE}, or a custom duration in milliseconds. */ @NonNull public B setDuration(@Duration int duration) { this.duration = duration; return (B) this; } /** * Return the duration. * * @see #setDuration */ @Duration public int getDuration() { return duration; } /** Returns the {@link AnimationMode}. */ @AnimationMode public int getAnimationMode() { return view.getAnimationMode(); } /** Sets the {@link AnimationMode}. */ public B setAnimationMode(@AnimationMode int animationMode) { view.setAnimationMode(animationMode); return (B) this; } /** * Returns the anchor view for this {@link BaseTransientBottomBar}. * * @see #setAnchorView(View) */ @Nullable public View getAnchorView() { return anchorView; } /** Sets the view the {@link BaseTransientBottomBar} should be anchored above. */ @NonNull public B setAnchorView(@Nullable View anchorView) { this.anchorView = anchorView; return (B) this; } /** Sets the id of the view the {@link BaseTransientBottomBar} should be anchored above. */ @NonNull public B setAnchorView(@IdRes int anchorViewId) { this.anchorView = targetParent.findViewById(anchorViewId); return (B) this; } /** * Sets the {@link BaseTransientBottomBar.Behavior} to be used in this {@link * BaseTransientBottomBar}. * * @param behavior {@link BaseTransientBottomBar.Behavior} to be applied. */ public B setBehavior(BaseTransientBottomBar.Behavior behavior) { this.behavior = behavior; return (B) this; } /** * Return the behavior. * * @see #setBehavior(BaseTransientBottomBar.Behavior) */ public BaseTransientBottomBar.Behavior getBehavior() { return behavior; } /** Returns the {@link BaseTransientBottomBar}'s context. */ @NonNull public Context getContext() { return context; } /** Returns the {@link BaseTransientBottomBar}'s view. */ @NonNull public View getView() { return view; } /** Show the {@link BaseTransientBottomBar}. */ public void show() { SnackbarManager.getInstance().show(getDuration(), managerCallback); } /** Dismiss the {@link BaseTransientBottomBar}. */ public void dismiss() { dispatchDismiss(BaseCallback.DISMISS_EVENT_MANUAL); } protected void dispatchDismiss(@BaseCallback.DismissEvent int event) { SnackbarManager.getInstance().dismiss(managerCallback, event); } /** * Adds the specified callback to the list of callbacks that will be notified of transient bottom * bar events. * * @param callback Callback to notify when transient bottom bar events occur. * @see #removeCallback(BaseCallback) */ @NonNull public B addCallback(@NonNull BaseCallback callback) { if (callback == null) { return (B) this; } if (callbacks == null) { callbacks = new ArrayList>(); } callbacks.add(callback); return (B) this; } /** * Removes the specified callback from the list of callbacks that will be notified of transient * bottom bar events. * * @param callback Callback to remove from being notified of transient bottom bar events * @see #addCallback(BaseCallback) */ @NonNull public B removeCallback(@NonNull BaseCallback callback) { if (callback == null) { return (B) this; } if (callbacks == null) { // This can happen if this method is called before the first call to addCallback return (B) this; } callbacks.remove(callback); return (B) this; } /** Return whether this {@link BaseTransientBottomBar} is currently being shown. */ public boolean isShown() { return SnackbarManager.getInstance().isCurrent(managerCallback); } /** * Returns whether this {@link BaseTransientBottomBar} is currently being shown, or is queued to * be shown next. */ public boolean isShownOrQueued() { return SnackbarManager.getInstance().isCurrentOrNext(managerCallback); } final SnackbarManager.Callback managerCallback = new SnackbarManager.Callback() { @Override public void show() { handler.sendMessage(handler.obtainMessage(MSG_SHOW, BaseTransientBottomBar.this)); } @Override public void dismiss(int event) { handler.sendMessage( handler.obtainMessage(MSG_DISMISS, event, 0, BaseTransientBottomBar.this)); } }; protected SwipeDismissBehavior getNewBehavior() { return new Behavior(); } final void showView() { if (this.view.getParent() == null) { final ViewGroup.LayoutParams lp = this.view.getLayoutParams(); if (lp instanceof CoordinatorLayout.LayoutParams) { // If our LayoutParams are from a CoordinatorLayout, we'll setup our Behavior final CoordinatorLayout.LayoutParams clp = (CoordinatorLayout.LayoutParams) lp; final SwipeDismissBehavior behavior = this.behavior == null ? getNewBehavior() : this.behavior; if (behavior instanceof BaseTransientBottomBar.Behavior) { ((BaseTransientBottomBar.Behavior) behavior).setBaseTransientBottomBar(this); } behavior.setListener( new SwipeDismissBehavior.OnDismissListener() { @Override public void onDismiss(View view) { view.setVisibility(View.GONE); dispatchDismiss(BaseCallback.DISMISS_EVENT_SWIPE); } @Override public void onDragStateChanged(int state) { switch (state) { case SwipeDismissBehavior.STATE_DRAGGING: case SwipeDismissBehavior.STATE_SETTLING: // If the view is being dragged or settling, pause the timeout SnackbarManager.getInstance().pauseTimeout(managerCallback); break; case SwipeDismissBehavior.STATE_IDLE: // If the view has been released and is idle, restore the timeout SnackbarManager.getInstance().restoreTimeoutIfPaused(managerCallback); break; default: // Any other state is ignored } } }); clp.setBehavior(behavior); // Also set the inset edge so that views can dodge the bar correctly, but only if there is // no anchor view. if (anchorView == null) { clp.insetEdge = Gravity.BOTTOM; } } extraBottomMarginAnchorView = calculateBottomMarginForAnchorView(); updateBottomMargin(); targetParent.addView(this.view); } this.view.setOnAttachStateChangeListener( new BaseTransientBottomBar.OnAttachStateChangeListener() { @Override public void onViewAttachedToWindow(View v) {} @Override public void onViewDetachedFromWindow(View v) { if (isShownOrQueued()) { // If we haven't already been dismissed then this event is coming from a // non-user initiated action. Hence we need to make sure that we callback // and keep our state up to date. We need to post the call since // removeView() will call through to onDetachedFromWindow and thus overflow. handler.post(() -> onViewHidden(BaseCallback.DISMISS_EVENT_MANUAL)); } } }); if (ViewCompat.isLaidOut(this.view)) { if (shouldAnimate()) { // If animations are enabled, animate it in animateViewIn(); } else { // Else if anims are disabled just call back now onViewShown(); } } else { // Otherwise, add one of our layout change listeners and show it in when laid out this.view.setOnLayoutChangeListener( (view, left, top, right, bottom) -> { BaseTransientBottomBar.this.view.setOnLayoutChangeListener(null); if (shouldAnimate()) { // If animations are enabled, animate it in animateViewIn(); } else { // Else if anims are disabled just call back now onViewShown(); } }); } } private int calculateBottomMarginForAnchorView() { if (anchorView == null) { return 0; } int[] anchorViewLocation = new int[2]; anchorView.getLocationOnScreen(anchorViewLocation); int anchorViewAbsoluteYTop = anchorViewLocation[1]; int[] targetParentLocation = new int[2]; targetParent.getLocationOnScreen(targetParentLocation); int targetParentAbsoluteYBottom = targetParentLocation[1] + targetParent.getHeight(); return targetParentAbsoluteYBottom - anchorViewAbsoluteYTop; } void animateViewIn() { if (view.getAnimationMode() == ANIMATION_MODE_FADE) { startFadeInAnimation(); } else { startSlideInAnimation(); } } private void animateViewOut(final int event) { if (view.getAnimationMode() == ANIMATION_MODE_FADE) { startFadeOutAnimation(event); } else { startSlideOutAnimation(event); } } private void startFadeInAnimation() { ValueAnimator alphaAnimator = getAlphaAnimator(0, 1); ValueAnimator scaleAnimator = getScaleAnimator(ANIMATION_SCALE_FROM_VALUE, 1); AnimatorSet animatorSet = new AnimatorSet(); animatorSet.playTogether(alphaAnimator, scaleAnimator); animatorSet.setDuration(ANIMATION_FADE_IN_DURATION); animatorSet.addListener( new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animator) { onViewShown(); } }); animatorSet.start(); } private void startFadeOutAnimation(final int event) { final ValueAnimator animator = getAlphaAnimator(1, 0); animator.setDuration(ANIMATION_FADE_OUT_DURATION); animator.addListener( new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animator) { onViewHidden(event); } }); animator.start(); } private ValueAnimator getAlphaAnimator(float... alphaValues) { ValueAnimator animator = ValueAnimator.ofFloat(alphaValues); animator.setInterpolator(LINEAR_INTERPOLATOR); animator.addUpdateListener( valueAnimator -> view.setAlpha((Float) valueAnimator.getAnimatedValue())); return animator; } private ValueAnimator getScaleAnimator(float... scaleValues) { ValueAnimator animator = ValueAnimator.ofFloat(scaleValues); animator.setInterpolator(LINEAR_OUT_SLOW_IN_INTERPOLATOR); animator.addUpdateListener( valueAnimator -> { float scale = (float) valueAnimator.getAnimatedValue(); view.setScaleX(scale); view.setScaleY(scale); }); return animator; } private void startSlideInAnimation() { final int translationYBottom = getTranslationYBottom(); if (USE_OFFSET_API) { ViewCompat.offsetTopAndBottom(view, translationYBottom); } else { view.setTranslationY(translationYBottom); } final ValueAnimator animator = new ValueAnimator(); animator.setIntValues(translationYBottom, 0); animator.setInterpolator(FAST_OUT_SLOW_IN_INTERPOLATOR); animator.setDuration(ANIMATION_DURATION); animator.addListener( new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animator) { contentViewCallback.animateContentIn( ANIMATION_DURATION - ANIMATION_FADE_DURATION, ANIMATION_FADE_DURATION); } @Override public void onAnimationEnd(Animator animator) { onViewShown(); } }); animator.addUpdateListener( new ValueAnimator.AnimatorUpdateListener() { private int previousAnimatedIntValue = translationYBottom; @Override public void onAnimationUpdate(ValueAnimator animator) { int currentAnimatedIntValue = (int) animator.getAnimatedValue(); if (USE_OFFSET_API) { // On JB/KK versions of the platform sometimes View.setTranslationY does not // result in layout / draw pass ViewCompat.offsetTopAndBottom( view, currentAnimatedIntValue - previousAnimatedIntValue); } else { view.setTranslationY(currentAnimatedIntValue); } previousAnimatedIntValue = currentAnimatedIntValue; } }); animator.start(); } private void startSlideOutAnimation(final int event) { final ValueAnimator animator = new ValueAnimator(); animator.setIntValues(0, getTranslationYBottom()); animator.setInterpolator(FAST_OUT_SLOW_IN_INTERPOLATOR); animator.setDuration(ANIMATION_DURATION); animator.addListener( new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animator) { contentViewCallback.animateContentOut(0, ANIMATION_FADE_DURATION); } @Override public void onAnimationEnd(Animator animator) { onViewHidden(event); } }); animator.addUpdateListener( new ValueAnimator.AnimatorUpdateListener() { private int previousAnimatedIntValue = 0; @Override public void onAnimationUpdate(ValueAnimator animator) { int currentAnimatedIntValue = (int) animator.getAnimatedValue(); if (USE_OFFSET_API) { // On JB/KK versions of the platform sometimes View.setTranslationY does not // result in layout / draw pass ViewCompat.offsetTopAndBottom( view, currentAnimatedIntValue - previousAnimatedIntValue); } else { view.setTranslationY(currentAnimatedIntValue); } previousAnimatedIntValue = currentAnimatedIntValue; } }); animator.start(); } private int getTranslationYBottom() { int translationY = view.getHeight(); LayoutParams layoutParams = view.getLayoutParams(); if (layoutParams instanceof MarginLayoutParams) { translationY += ((MarginLayoutParams) layoutParams).bottomMargin; } return translationY; } final void hideView(@BaseCallback.DismissEvent final int event) { if (shouldAnimate() && view.getVisibility() == View.VISIBLE) { animateViewOut(event); } else { // If anims are disabled or the view isn't visible, just call back now onViewHidden(event); } } void onViewShown() { SnackbarManager.getInstance().onShown(managerCallback); if (callbacks != null) { // Notify the callbacks. Do that from the end of the list so that if a callback // removes itself as the result of being called, it won't mess up with our iteration int callbackCount = callbacks.size(); for (int i = callbackCount - 1; i >= 0; i--) { callbacks.get(i).onShown((B) this); } } } void onViewHidden(int event) { // First tell the SnackbarManager that it has been dismissed SnackbarManager.getInstance().onDismissed(managerCallback); if (callbacks != null) { // Notify the callbacks. Do that from the end of the list so that if a callback // removes itself as the result of being called, it won't mess up with our iteration int callbackCount = callbacks.size(); for (int i = callbackCount - 1; i >= 0; i--) { callbacks.get(i).onDismissed((B) this, event); } } // Lastly, hide and remove the view from the parent (if attached) final ViewParent parent = view.getParent(); if (parent instanceof ViewGroup) { ((ViewGroup) parent).removeView(view); } } /** Returns true if we should animate the Snackbar view in/out. */ boolean shouldAnimate() { final int feedbackFlags = AccessibilityServiceInfo.FEEDBACK_SPOKEN; List serviceList = accessibilityManager.getEnabledAccessibilityServiceList(feedbackFlags); return serviceList != null && serviceList.isEmpty(); } /** @hide */ @RestrictTo(LIBRARY_GROUP) protected static class SnackbarBaseLayout extends FrameLayout { @SuppressLint("ClickableViewAccessibility") private static final OnTouchListener consumeAllTouchListener = (v, event) -> { // Prevent touches from passing through this view. return true; }; private BaseTransientBottomBar.OnLayoutChangeListener onLayoutChangeListener; private BaseTransientBottomBar.OnAttachStateChangeListener onAttachStateChangeListener; @AnimationMode private int animationMode; private final float backgroundOverlayColorAlpha; private final float actionTextColorAlpha; protected SnackbarBaseLayout(Context context) { this(context, null); } protected SnackbarBaseLayout(Context context, AttributeSet attrs) { super(createThemedContext(context, attrs, 0, 0), attrs); // Ensure we are using the correctly themed context rather than the context that was passed // in. context = getContext(); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SnackbarLayout); if (a.hasValue(R.styleable.SnackbarLayout_elevation)) { ViewCompat.setElevation( this, a.getDimensionPixelSize(R.styleable.SnackbarLayout_elevation, 0)); } animationMode = a.getInt(R.styleable.SnackbarLayout_animationMode, ANIMATION_MODE_SLIDE); backgroundOverlayColorAlpha = a.getFloat(R.styleable.SnackbarLayout_backgroundOverlayColorAlpha, 1); actionTextColorAlpha = a.getFloat(R.styleable.SnackbarLayout_actionTextColorAlpha, 1); a.recycle(); setOnTouchListener(consumeAllTouchListener); setFocusable(true); } @Override public void setOnClickListener(@Nullable OnClickListener onClickListener) { // Clear touch listener that consumes all touches if there is a custom click listener. setOnTouchListener(onClickListener != null ? null : consumeAllTouchListener); super.setOnClickListener(onClickListener); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); if (onLayoutChangeListener != null) { onLayoutChangeListener.onLayoutChange(this, l, t, r, b); } } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); if (onAttachStateChangeListener != null) { onAttachStateChangeListener.onViewAttachedToWindow(this); } ViewCompat.requestApplyInsets(this); } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); if (onAttachStateChangeListener != null) { onAttachStateChangeListener.onViewDetachedFromWindow(this); } } void setOnLayoutChangeListener( BaseTransientBottomBar.OnLayoutChangeListener onLayoutChangeListener) { this.onLayoutChangeListener = onLayoutChangeListener; } void setOnAttachStateChangeListener( BaseTransientBottomBar.OnAttachStateChangeListener listener) { onAttachStateChangeListener = listener; } @AnimationMode int getAnimationMode() { return animationMode; } void setAnimationMode(@AnimationMode int animationMode) { this.animationMode = animationMode; } float getBackgroundOverlayColorAlpha() { return backgroundOverlayColorAlpha; } float getActionTextColorAlpha() { return actionTextColorAlpha; } } /** Behavior for {@link BaseTransientBottomBar}. */ public static class Behavior extends SwipeDismissBehavior { private final BehaviorDelegate delegate; public Behavior() { delegate = new BehaviorDelegate(this); } private void setBaseTransientBottomBar(BaseTransientBottomBar baseTransientBottomBar) { delegate.setBaseTransientBottomBar(baseTransientBottomBar); } @Override public boolean canSwipeDismissView(View child) { return delegate.canSwipeDismissView(child); } @Override public boolean onInterceptTouchEvent(CoordinatorLayout parent, View child, MotionEvent event) { delegate.onInterceptTouchEvent(parent, child, event); return super.onInterceptTouchEvent(parent, child, event); } } /** @hide */ @RestrictTo(LIBRARY_GROUP) // TODO: Delegate can be rolled up into behavior after the widget migration is finished. public static class BehaviorDelegate { private SnackbarManager.Callback managerCallback; public BehaviorDelegate(SwipeDismissBehavior behavior) { behavior.setStartAlphaSwipeDistance(0.1f); behavior.setEndAlphaSwipeDistance(0.6f); behavior.setSwipeDirection(SwipeDismissBehavior.SWIPE_DIRECTION_START_TO_END); } public void setBaseTransientBottomBar(BaseTransientBottomBar baseTransientBottomBar) { this.managerCallback = baseTransientBottomBar.managerCallback; } public boolean canSwipeDismissView(View child) { return child instanceof SnackbarBaseLayout; } public void onInterceptTouchEvent(CoordinatorLayout parent, View child, MotionEvent event) { switch (event.getActionMasked()) { case MotionEvent.ACTION_DOWN: // We want to make sure that we disable any Snackbar timeouts if the user is // currently touching the Snackbar. We restore the timeout when complete if (parent.isPointInChildBounds(child, (int) event.getX(), (int) event.getY())) { SnackbarManager.getInstance().pauseTimeout(managerCallback); } break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: SnackbarManager.getInstance().restoreTimeoutIfPaused(managerCallback); break; default: break; } } } }