/
BottomNavigationMenuView.java
713 lines (646 loc) · 23.8 KB
/
BottomNavigationMenuView.java
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/*
* Copyright (C) 2016 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.bottomnavigation;
import com.google.android.material.R;
import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import androidx.annotation.Dimension;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RestrictTo;
import androidx.annotation.StyleRes;
import androidx.core.util.Pools;
import androidx.core.view.ViewCompat;
import androidx.appcompat.content.res.AppCompatResources;
import androidx.appcompat.view.menu.MenuBuilder;
import androidx.appcompat.view.menu.MenuItemImpl;
import androidx.appcompat.view.menu.MenuView;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.util.TypedValue;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import androidx.interpolator.view.animation.FastOutSlowInInterpolator;
import androidx.transition.AutoTransition;
import androidx.transition.TransitionManager;
import androidx.transition.TransitionSet;
import com.google.android.material.badge.BadgeDrawable;
import com.google.android.material.internal.TextScale;
import java.util.HashSet;
/** @hide For internal use only. */
@RestrictTo(LIBRARY_GROUP)
public class BottomNavigationMenuView extends ViewGroup implements MenuView {
private static final long ACTIVE_ANIMATION_DURATION_MS = 115L;
private static final int ITEM_POOL_SIZE = 5;
private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked};
private static final int[] DISABLED_STATE_SET = {-android.R.attr.state_enabled};
@NonNull private final TransitionSet set;
private final int inactiveItemMaxWidth;
private final int inactiveItemMinWidth;
private final int activeItemMaxWidth;
private final int activeItemMinWidth;
private final int itemHeight;
@NonNull private final OnClickListener onClickListener;
private final Pools.Pool<BottomNavigationItemView> itemPool =
new Pools.SynchronizedPool<>(ITEM_POOL_SIZE);
private boolean itemHorizontalTranslationEnabled;
@LabelVisibilityMode private int labelVisibilityMode;
@Nullable private BottomNavigationItemView[] buttons;
private int selectedItemId = 0;
private int selectedItemPosition = 0;
private ColorStateList itemIconTint;
@Dimension private int itemIconSize;
private ColorStateList itemTextColorFromUser;
@Nullable private final ColorStateList itemTextColorDefault;
@StyleRes private int itemTextAppearanceInactive;
@StyleRes private int itemTextAppearanceActive;
private Drawable itemBackground;
private int itemBackgroundRes;
private int[] tempChildWidths;
@NonNull private SparseArray<BadgeDrawable> badgeDrawables = new SparseArray<>(ITEM_POOL_SIZE);
private BottomNavigationPresenter presenter;
private MenuBuilder menu;
public BottomNavigationMenuView(Context context) {
this(context, null);
}
public BottomNavigationMenuView(Context context, AttributeSet attrs) {
super(context, attrs);
final Resources res = getResources();
inactiveItemMaxWidth =
res.getDimensionPixelSize(R.dimen.design_bottom_navigation_item_max_width);
inactiveItemMinWidth =
res.getDimensionPixelSize(R.dimen.design_bottom_navigation_item_min_width);
activeItemMaxWidth =
res.getDimensionPixelSize(R.dimen.design_bottom_navigation_active_item_max_width);
activeItemMinWidth =
res.getDimensionPixelSize(R.dimen.design_bottom_navigation_active_item_min_width);
itemHeight = res.getDimensionPixelSize(R.dimen.design_bottom_navigation_height);
itemTextColorDefault = createDefaultColorStateList(android.R.attr.textColorSecondary);
set = new AutoTransition();
set.setOrdering(TransitionSet.ORDERING_TOGETHER);
set.setDuration(ACTIVE_ANIMATION_DURATION_MS);
set.setInterpolator(new FastOutSlowInInterpolator());
set.addTransition(new TextScale());
onClickListener =
new OnClickListener() {
@Override
public void onClick(View v) {
final BottomNavigationItemView itemView = (BottomNavigationItemView) v;
MenuItem item = itemView.getItemData();
if (!menu.performItemAction(item, presenter, 0)) {
item.setChecked(true);
}
}
};
tempChildWidths = new int[BottomNavigationMenu.MAX_ITEM_COUNT];
}
@Override
public void initialize(MenuBuilder menu) {
this.menu = menu;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int width = MeasureSpec.getSize(widthMeasureSpec);
// Use visible item count to calculate widths
final int visibleCount = menu.getVisibleItems().size();
// Use total item counts to measure children
final int totalCount = getChildCount();
final int heightSpec = MeasureSpec.makeMeasureSpec(itemHeight, MeasureSpec.EXACTLY);
if (isShifting(labelVisibilityMode, visibleCount) && itemHorizontalTranslationEnabled) {
final View activeChild = getChildAt(selectedItemPosition);
int activeItemWidth = activeItemMinWidth;
if (activeChild.getVisibility() != View.GONE) {
// Do an AT_MOST measure pass on the active child to get its desired width, and resize the
// active child view based on that width
activeChild.measure(
MeasureSpec.makeMeasureSpec(activeItemMaxWidth, MeasureSpec.AT_MOST), heightSpec);
activeItemWidth = Math.max(activeItemWidth, activeChild.getMeasuredWidth());
}
final int inactiveCount = visibleCount - (activeChild.getVisibility() != View.GONE ? 1 : 0);
final int activeMaxAvailable = width - inactiveCount * inactiveItemMinWidth;
final int activeWidth =
Math.min(activeMaxAvailable, Math.min(activeItemWidth, activeItemMaxWidth));
final int inactiveMaxAvailable =
(width - activeWidth) / (inactiveCount == 0 ? 1 : inactiveCount);
final int inactiveWidth = Math.min(inactiveMaxAvailable, inactiveItemMaxWidth);
int extra = width - activeWidth - inactiveWidth * inactiveCount;
for (int i = 0; i < totalCount; i++) {
if (getChildAt(i).getVisibility() != View.GONE) {
tempChildWidths[i] = (i == selectedItemPosition) ? activeWidth : inactiveWidth;
// Account for integer division which sometimes leaves some extra pixel spaces.
// e.g. If the nav was 10px wide, and 3 children were measured to be 3px-3px-3px, there
// would be a 1px gap somewhere, which this fills in.
if (extra > 0) {
tempChildWidths[i]++;
extra--;
}
} else {
tempChildWidths[i] = 0;
}
}
} else {
final int maxAvailable = width / (visibleCount == 0 ? 1 : visibleCount);
final int childWidth = Math.min(maxAvailable, activeItemMaxWidth);
int extra = width - childWidth * visibleCount;
for (int i = 0; i < totalCount; i++) {
if (getChildAt(i).getVisibility() != View.GONE) {
tempChildWidths[i] = childWidth;
if (extra > 0) {
tempChildWidths[i]++;
extra--;
}
} else {
tempChildWidths[i] = 0;
}
}
}
int totalWidth = 0;
for (int i = 0; i < totalCount; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
child.measure(
MeasureSpec.makeMeasureSpec(tempChildWidths[i], MeasureSpec.EXACTLY), heightSpec);
ViewGroup.LayoutParams params = child.getLayoutParams();
params.width = child.getMeasuredWidth();
totalWidth += child.getMeasuredWidth();
}
setMeasuredDimension(
View.resolveSizeAndState(
totalWidth, MeasureSpec.makeMeasureSpec(totalWidth, MeasureSpec.EXACTLY), 0),
View.resolveSizeAndState(itemHeight, heightSpec, 0));
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
final int count = getChildCount();
final int width = right - left;
final int height = bottom - top;
int used = 0;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
if (ViewCompat.getLayoutDirection(this) == ViewCompat.LAYOUT_DIRECTION_RTL) {
child.layout(width - used - child.getMeasuredWidth(), 0, width - used, height);
} else {
child.layout(used, 0, child.getMeasuredWidth() + used, height);
}
used += child.getMeasuredWidth();
}
}
@Override
public int getWindowAnimations() {
return 0;
}
/**
* Sets the tint which is applied to the menu items' icons.
*
* @param tint the tint to apply
*/
public void setIconTintList(ColorStateList tint) {
itemIconTint = tint;
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
item.setIconTintList(tint);
}
}
}
/**
* Returns the tint which is applied for the menu item labels.
*
* @return the ColorStateList that is used to tint menu items' icons
*/
@Nullable
public ColorStateList getIconTintList() {
return itemIconTint;
}
/**
* Sets the size to provide for the menu item icons.
*
* <p>For best image resolution, use an icon with the same size set in this method.
*
* @param iconSize the size to provide for the menu item icons in pixels
*/
public void setItemIconSize(@Dimension int iconSize) {
this.itemIconSize = iconSize;
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
item.setIconSize(iconSize);
}
}
}
/** Returns the size in pixels provided for the menu item icons. */
@Dimension
public int getItemIconSize() {
return itemIconSize;
}
/**
* Sets the text color to be used for the menu item labels.
*
* @param color the ColorStateList used for menu item labels
*/
public void setItemTextColor(ColorStateList color) {
itemTextColorFromUser = color;
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
item.setTextColor(color);
}
}
}
/**
* Returns the text color used for menu item labels.
*
* @return the ColorStateList used for menu items labels
*/
public ColorStateList getItemTextColor() {
return itemTextColorFromUser;
}
/**
* Sets the text appearance to be used for inactive menu item labels.
*
* @param textAppearanceRes the text appearance ID used for inactive menu item labels
*/
public void setItemTextAppearanceInactive(@StyleRes int textAppearanceRes) {
this.itemTextAppearanceInactive = textAppearanceRes;
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
item.setTextAppearanceInactive(textAppearanceRes);
// Set the text color if the user has set it, since itemTextColorFromUser takes precedence
// over a color set in the text appearance.
if (itemTextColorFromUser != null) {
item.setTextColor(itemTextColorFromUser);
}
}
}
}
/**
* Returns the text appearance used for inactive menu item labels.
*
* @return the text appearance ID used for inactive menu item labels
*/
@StyleRes
public int getItemTextAppearanceInactive() {
return itemTextAppearanceInactive;
}
/**
* Sets the text appearance to be used for the active menu item label.
*
* @param textAppearanceRes the text appearance ID used for the active menu item label
*/
public void setItemTextAppearanceActive(@StyleRes int textAppearanceRes) {
this.itemTextAppearanceActive = textAppearanceRes;
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
item.setTextAppearanceActive(textAppearanceRes);
// Set the text color if the user has set it, since itemTextColorFromUser takes precedence
// over a color set in the text appearance.
if (itemTextColorFromUser != null) {
item.setTextColor(itemTextColorFromUser);
}
}
}
}
/**
* Returns the text appearance used for the active menu item label.
*
* @return the text appearance ID used for the active menu item label
*/
@StyleRes
public int getItemTextAppearanceActive() {
return itemTextAppearanceActive;
}
/**
* Sets the resource ID to be used for item backgrounds.
*
* @param background the resource ID of the background
*/
public void setItemBackgroundRes(int background) {
itemBackgroundRes = background;
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
item.setItemBackground(background);
}
}
}
/**
* Returns the resource ID for the background of the menu items.
*
* @return the resource ID for the background
* @deprecated Use {@link #getItemBackground()} instead.
*/
@Deprecated
public int getItemBackgroundRes() {
return itemBackgroundRes;
}
/**
* Sets the drawable to be used for item backgrounds.
*
* @param background the drawable of the background
*/
public void setItemBackground(@Nullable Drawable background) {
itemBackground = background;
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
item.setItemBackground(background);
}
}
}
/**
* Returns the drawable for the background of the menu items.
*
* @return the drawable for the background
*/
@Nullable
public Drawable getItemBackground() {
if (buttons != null && buttons.length > 0) {
// Return button background instead of itemBackground if possible, so that the correct
// drawable is returned if the background is set via #setItemBackgroundRes.
return buttons[0].getBackground();
} else {
return itemBackground;
}
}
/**
* Sets the navigation items' label visibility mode.
*
* <p>The label is either always shown, never shown, or only shown when activated. Also supports
* "auto" mode, which uses the item count to determine whether to show or hide the label.
*
* @param labelVisibilityMode mode which decides whether or not the label should be shown. Can be
* one of {@link LabelVisibilityMode#LABEL_VISIBILITY_AUTO}, {@link
* LabelVisibilityMode#LABEL_VISIBILITY_SELECTED}, {@link
* LabelVisibilityMode#LABEL_VISIBILITY_LABELED}, or {@link
* LabelVisibilityMode#LABEL_VISIBILITY_UNLABELED}
* @see #getLabelVisibilityMode()
*/
public void setLabelVisibilityMode(@LabelVisibilityMode int labelVisibilityMode) {
this.labelVisibilityMode = labelVisibilityMode;
}
/**
* Returns the current label visibility mode.
*
* @see #setLabelVisibilityMode(int)
*/
public int getLabelVisibilityMode() {
return labelVisibilityMode;
}
/**
* Sets whether the menu items horizontally translate on selection when the combined item widths
* fill the screen.
*
* @param itemHorizontalTranslationEnabled whether the menu items horizontally translate on
* selection
* @see #isItemHorizontalTranslationEnabled()
*/
public void setItemHorizontalTranslationEnabled(boolean itemHorizontalTranslationEnabled) {
this.itemHorizontalTranslationEnabled = itemHorizontalTranslationEnabled;
}
/**
* Returns whether the menu items horizontally translate on selection when the combined item
* widths fill the screen.
*
* @return whether the menu items horizontally translate on selection
* @see #setItemHorizontalTranslationEnabled(boolean)
*/
public boolean isItemHorizontalTranslationEnabled() {
return itemHorizontalTranslationEnabled;
}
@Nullable
public ColorStateList createDefaultColorStateList(int baseColorThemeAttr) {
final TypedValue value = new TypedValue();
if (!getContext().getTheme().resolveAttribute(baseColorThemeAttr, value, true)) {
return null;
}
ColorStateList baseColor = AppCompatResources.getColorStateList(getContext(), value.resourceId);
if (!getContext()
.getTheme()
.resolveAttribute(androidx.appcompat.R.attr.colorPrimary, value, true)) {
return null;
}
int colorPrimary = value.data;
int defaultColor = baseColor.getDefaultColor();
return new ColorStateList(
new int[][] {DISABLED_STATE_SET, CHECKED_STATE_SET, EMPTY_STATE_SET},
new int[] {
baseColor.getColorForState(DISABLED_STATE_SET, defaultColor), colorPrimary, defaultColor
});
}
public void setPresenter(BottomNavigationPresenter presenter) {
this.presenter = presenter;
}
public void buildMenuView() {
removeAllViews();
if (buttons != null) {
for (BottomNavigationItemView item : buttons) {
if (item != null) {
itemPool.release(item);
item.removeBadge();
}
}
}
if (menu.size() == 0) {
selectedItemId = 0;
selectedItemPosition = 0;
buttons = null;
return;
}
removeUnusedBadges();
buttons = new BottomNavigationItemView[menu.size()];
boolean shifting = isShifting(labelVisibilityMode, menu.getVisibleItems().size());
for (int i = 0; i < menu.size(); i++) {
presenter.setUpdateSuspended(true);
menu.getItem(i).setCheckable(true);
presenter.setUpdateSuspended(false);
BottomNavigationItemView child = getNewItem();
buttons[i] = child;
child.setIconTintList(itemIconTint);
child.setIconSize(itemIconSize);
// Set the text color the default, then look for another text color in order of precedence.
child.setTextColor(itemTextColorDefault);
child.setTextAppearanceInactive(itemTextAppearanceInactive);
child.setTextAppearanceActive(itemTextAppearanceActive);
child.setTextColor(itemTextColorFromUser);
if (itemBackground != null) {
child.setItemBackground(itemBackground);
} else {
child.setItemBackground(itemBackgroundRes);
}
child.setShifting(shifting);
child.setLabelVisibilityMode(labelVisibilityMode);
child.initialize((MenuItemImpl) menu.getItem(i), 0);
child.setItemPosition(i);
child.setOnClickListener(onClickListener);
if (selectedItemId != Menu.NONE && menu.getItem(i).getItemId() == selectedItemId) {
selectedItemPosition = i;
}
setBadgeIfNeeded(child);
addView(child);
}
selectedItemPosition = Math.min(menu.size() - 1, selectedItemPosition);
menu.getItem(selectedItemPosition).setChecked(true);
}
public void updateMenuView() {
if (menu == null || buttons == null) {
return;
}
final int menuSize = menu.size();
if (menuSize != buttons.length) {
// The size has changed. Rebuild menu view from scratch.
buildMenuView();
return;
}
int previousSelectedId = selectedItemId;
for (int i = 0; i < menuSize; i++) {
MenuItem item = menu.getItem(i);
if (item.isChecked()) {
selectedItemId = item.getItemId();
selectedItemPosition = i;
}
}
if (previousSelectedId != selectedItemId) {
// Note: this has to be called before BottomNavigationItemView#initialize().
TransitionManager.beginDelayedTransition(this, set);
}
boolean shifting = isShifting(labelVisibilityMode, menu.getVisibleItems().size());
for (int i = 0; i < menuSize; i++) {
presenter.setUpdateSuspended(true);
buttons[i].setLabelVisibilityMode(labelVisibilityMode);
buttons[i].setShifting(shifting);
buttons[i].initialize((MenuItemImpl) menu.getItem(i), 0);
presenter.setUpdateSuspended(false);
}
}
private BottomNavigationItemView getNewItem() {
BottomNavigationItemView item = itemPool.acquire();
if (item == null) {
item = new BottomNavigationItemView(getContext());
}
return item;
}
public int getSelectedItemId() {
return selectedItemId;
}
private boolean isShifting(@LabelVisibilityMode int labelVisibilityMode, int childCount) {
return labelVisibilityMode == LabelVisibilityMode.LABEL_VISIBILITY_AUTO
? childCount > 3
: labelVisibilityMode == LabelVisibilityMode.LABEL_VISIBILITY_SELECTED;
}
void tryRestoreSelectedItemId(int itemId) {
final int size = menu.size();
for (int i = 0; i < size; i++) {
MenuItem item = menu.getItem(i);
if (itemId == item.getItemId()) {
selectedItemId = itemId;
selectedItemPosition = i;
item.setChecked(true);
break;
}
}
}
SparseArray<BadgeDrawable> getBadgeDrawables() {
return badgeDrawables;
}
void setBadgeDrawables(SparseArray<BadgeDrawable> badgeDrawables) {
this.badgeDrawables = badgeDrawables;
}
@Nullable
BadgeDrawable getBadge(int menuItemId) {
return badgeDrawables.get(menuItemId);
}
/**
* Creates an instance of {@link BadgeDrawable} if none exists. Initializes (if needed) and
* returns the associated instance of {@link BadgeDrawable}.
*
* @param menuItemId Id of the menu item.
* @return an instance of BadgeDrawable associated with {@code menuItemId}.
*/
BadgeDrawable getOrCreateBadge(int menuItemId) {
validateMenuItemId(menuItemId);
BadgeDrawable badgeDrawable = badgeDrawables.get(menuItemId);
// Create an instance of BadgeDrawable if none were already initialized for this menu item.
if (badgeDrawable == null) {
badgeDrawable = BadgeDrawable.create(getContext());
badgeDrawables.put(menuItemId, badgeDrawable);
}
BottomNavigationItemView itemView = findItemView(menuItemId);
if (itemView != null) {
itemView.setBadge(badgeDrawable);
}
return badgeDrawable;
}
void removeBadge(int menuItemId) {
validateMenuItemId(menuItemId);
BadgeDrawable badgeDrawable = badgeDrawables.get(menuItemId);
BottomNavigationItemView itemView = findItemView(menuItemId);
if (itemView != null) {
itemView.removeBadge();
}
if (badgeDrawable != null) {
badgeDrawables.remove(menuItemId);
}
}
private void setBadgeIfNeeded(@NonNull BottomNavigationItemView child) {
int childId = child.getId();
if (!isValidId(childId)) {
// Child doesn't have a valid id, do not set any BadgeDrawable on the view.
return;
}
BadgeDrawable badgeDrawable = badgeDrawables.get(childId);
if (badgeDrawable != null) {
child.setBadge(badgeDrawable);
}
}
private void removeUnusedBadges() {
HashSet<Integer> activeKeys = new HashSet<>();
// Remove keys from badgeDrawables that don't have a corresponding value in the menu.
for (int i = 0; i < menu.size(); i++) {
activeKeys.add(menu.getItem(i).getItemId());
}
for (int i = 0; i < badgeDrawables.size(); i++) {
int key = badgeDrawables.keyAt(i);
if (!activeKeys.contains(key)) {
badgeDrawables.delete(key);
}
}
}
@Nullable
private BottomNavigationItemView findItemView(int menuItemId) {
validateMenuItemId(menuItemId);
if (buttons != null) {
for (BottomNavigationItemView itemView : buttons) {
if (itemView.getId() == menuItemId) {
return itemView;
}
}
}
return null;
}
private boolean isValidId(int viewId) {
return viewId != View.NO_ID;
}
private void validateMenuItemId(int viewId) {
if (!isValidId(viewId)) {
throw new IllegalArgumentException(viewId + " is not a valid view id");
}
}
}