Java tutorial
/* * Copyright (C) 2014 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 connect.app.com.connect.calendar; import android.annotation.TargetApi; import android.content.Context; import android.content.res.ColorStateList; import android.content.res.Resources; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Paint.Align; import android.graphics.Paint.Style; import android.graphics.Rect; import android.graphics.Typeface; import android.os.Build; import android.os.Bundle; import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat; import android.support.v4.widget.ExploreByTouchHelper; import android.text.TextPaint; import android.text.format.DateFormat; import android.util.AttributeSet; import android.util.StateSet; import android.view.MotionEvent; import android.view.View; import android.view.accessibility.AccessibilityEvent; import android.view.accessibility.AccessibilityNodeInfo; import java.text.NumberFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.List; import java.util.Locale; import connect.app.com.connect.R; /** * A calendar-like view displaying a specified month and the appropriate selectable day numbers * within the specified month. */ class SimpleMonthView extends View { private static final int DAYS_IN_WEEK = 7; private static final int MAX_WEEKS_IN_MONTH = 6; private static final int DEFAULT_SELECTED_DAY = -1; private static final int DEFAULT_WEEK_START = Calendar.SUNDAY; private static final String DEFAULT_TITLE_FORMAT = "MMMMy"; private static final String DAY_OF_WEEK_FORMAT = "EEEEE"; private final TextPaint mMonthPaint = new TextPaint(); private final TextPaint mDayOfWeekPaint = new TextPaint(); private final TextPaint mDayPaint = new TextPaint(); private final Paint mDaySelectorPaint = new Paint(); private final Paint mDayHighlightPaint = new Paint(); private final Calendar mCalendar = Calendar.getInstance(); private final Calendar mDayOfWeekLabelCalendar = Calendar.getInstance(); private final MonthViewTouchHelper mTouchHelper; private final SimpleDateFormat mTitleFormatter; private final SimpleDateFormat mDayOfWeekFormatter; private final NumberFormat mDayFormatter; // Desired dimensions. private final int mDesiredMonthHeight; private final int mDesiredDayOfWeekHeight; private final int mDesiredDayHeight; private final int mDesiredCellWidth; private final int mDesiredDaySelectorRadius; private CharSequence mTitle; private int mMonth; private int mYear; // Dimensions as laid out. private int mMonthHeight; private int mDayOfWeekHeight; private int mDayHeight; private int mCellWidth; private int mDaySelectorRadius; private int mPaddedWidth; private int mPaddedHeight; /** The day of month for the selected day, or -1 if no day is selected. */ private int mActivatedDay = -1; /** * The day of month for today, or -1 if the today is not in the current * month. */ private int mToday = DEFAULT_SELECTED_DAY; /** The first day of the week (ex. Calendar.SUNDAY). */ private int mWeekStart = DEFAULT_WEEK_START; /** The number of days (ex. 28) in the current month. */ private int mDaysInMonth; /** * The day of week (ex. Calendar.SUNDAY) for the first day of the current * month. */ private int mDayOfWeekStart; /** The day of month for the first (inclusive) enabled day. */ private int mEnabledDayStart = 1; /** The day of month for the last (inclusive) enabled day. */ private int mEnabledDayEnd = 31; /** Optional listener for handling day click actions. */ private OnDayClickListener mOnDayClickListener; private ColorStateList mDayTextColor; private int mTouchedItem = -1; public SimpleMonthView(Context context) { this(context, null); } public SimpleMonthView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public SimpleMonthView(Context context, AttributeSet attrs, int defStyleAttr) { this(context, attrs, defStyleAttr, 0); } @TargetApi(Build.VERSION_CODES.LOLLIPOP) public SimpleMonthView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); final Resources res = context.getResources(); mDesiredMonthHeight = res.getDimensionPixelSize(R.dimen.date_picker_month_height); mDesiredDayOfWeekHeight = res.getDimensionPixelSize(R.dimen.date_picker_day_of_week_height); mDesiredDayHeight = res.getDimensionPixelSize(R.dimen.date_picker_day_height); mDesiredCellWidth = res.getDimensionPixelSize(R.dimen.date_picker_day_width); mDesiredDaySelectorRadius = res.getDimensionPixelSize(R.dimen.date_picker_day_selector_radius); // Set up accessibility components. mTouchHelper = new MonthViewTouchHelper(this); // setAccessibilityDelegate(mTouchHelper); setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); final Locale locale = res.getConfiguration().locale; final String titleFormat = DateFormat.getBestDateTimePattern(locale, DEFAULT_TITLE_FORMAT); mTitleFormatter = new SimpleDateFormat(titleFormat, locale); mDayOfWeekFormatter = new SimpleDateFormat(DAY_OF_WEEK_FORMAT, locale); mDayFormatter = NumberFormat.getIntegerInstance(locale); initPaints(res); } /** * Applies the specified text appearance resource to a paint, returning the * text color if one is set in the text appearance. * * @param p the paint to modify * @param resId the resource ID of the text appearance * @return the text color, if available */ private ColorStateList applyTextAppearance(Paint p, int resId) { final TypedArray ta = getContext().obtainStyledAttributes(null, R.styleable.TextAppearance, 0, resId); // final String fontFamily = ta.getString(R.styleable.TextAppearance_fontFamily); // if (fontFamily != null) { // p.setTypeface(Typeface.create(fontFamily, 0)); // } // p.setTextSize(ta.getDimensionPixelSize( // R.styleable.TextAppearance_textSize, (int) p.getTextSize())); // final ColorStateList textColor = ta.getColorStateList(R.styleable.TextAppearance_textColor); // if (textColor != null) { // final int enabledColor = textColor.getColorForState(ENABLED_STATE_SET, 0); // p.setColor(enabledColor); // } ta.recycle(); return new ColorStateList(new int[][] {}, new int[] {}); } public int getMonthHeight() { return mMonthHeight; } public int getCellWidth() { return mCellWidth; } public void setMonthTextAppearance(int resId) { applyTextAppearance(mMonthPaint, resId); invalidate(); } public void setDayOfWeekTextAppearance(int resId) { applyTextAppearance(mDayOfWeekPaint, resId); invalidate(); } public void setDayTextAppearance(int resId) { final ColorStateList textColor = applyTextAppearance(mDayPaint, resId); if (textColor != null) { mDayTextColor = textColor; } invalidate(); } public CharSequence getTitle() { if (mTitle == null) { mTitle = mTitleFormatter.format(mCalendar.getTime()); } return mTitle; } /** * Sets up the text and style properties for painting. */ private void initPaints(Resources res) { final String monthTypeface = res.getString(R.string.date_picker_month_typeface); final String dayOfWeekTypeface = res.getString(R.string.date_picker_day_of_week_typeface); final String dayTypeface = res.getString(R.string.date_picker_day_typeface); final int monthTextSize = res.getDimensionPixelSize(R.dimen.date_picker_month_text_size); final int dayOfWeekTextSize = res.getDimensionPixelSize(R.dimen.date_picker_day_of_week_text_size); final int dayTextSize = res.getDimensionPixelSize(R.dimen.date_picker_day_text_size); mMonthPaint.setAntiAlias(true); mMonthPaint.setTextSize(monthTextSize); mMonthPaint.setTypeface(Typeface.create(monthTypeface, 0)); mMonthPaint.setTextAlign(Align.CENTER); mMonthPaint.setStyle(Style.FILL); mDayOfWeekPaint.setAntiAlias(true); mDayOfWeekPaint.setTextSize(dayOfWeekTextSize); mDayOfWeekPaint.setTypeface(Typeface.create(dayOfWeekTypeface, 0)); mDayOfWeekPaint.setTextAlign(Align.CENTER); mDayOfWeekPaint.setStyle(Style.FILL); mDaySelectorPaint.setAntiAlias(true); mDaySelectorPaint.setStyle(Style.FILL); mDayHighlightPaint.setAntiAlias(true); mDayHighlightPaint.setStyle(Style.FILL); mDayPaint.setAntiAlias(true); mDayPaint.setTextSize(dayTextSize); mDayPaint.setTypeface(Typeface.create(dayTypeface, 0)); mDayPaint.setTextAlign(Align.CENTER); mDayPaint.setStyle(Style.FILL); } void setMonthTextColor(ColorStateList monthTextColor) { final int enabledColor = monthTextColor.getColorForState(ENABLED_STATE_SET, 0); mMonthPaint.setColor(enabledColor); invalidate(); } void setDayOfWeekTextColor(ColorStateList dayOfWeekTextColor) { final int enabledColor = dayOfWeekTextColor.getColorForState(ENABLED_STATE_SET, 0); mDayOfWeekPaint.setColor(enabledColor); invalidate(); } void setDayTextColor(ColorStateList dayTextColor) { mDayTextColor = dayTextColor; invalidate(); } void setDaySelectorColor(ColorStateList dayBackgroundColor) { // final int activatedColor = dayBackgroundColor.getColorForState( // StateSet.get(StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_ACTIVATED), 0); // mDaySelectorPaint.setColor(activatedColor); // invalidate(); } void setDayHighlightColor(ColorStateList dayHighlightColor) { // final int pressedColor = dayHighlightColor.getColorForState( // StateSet.get(StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED), 0); // mDayHighlightPaint.setColor(pressedColor); // invalidate(); } public void setOnDayClickListener(OnDayClickListener listener) { mOnDayClickListener = listener; } @Override public boolean dispatchHoverEvent(MotionEvent event) { // First right-of-refusal goes the touch exploration helper. return mTouchHelper.dispatchHoverEvent(event) || super.dispatchHoverEvent(event); } @Override public boolean onTouchEvent(MotionEvent event) { final int x = (int) (event.getX() + 0.5f); final int y = (int) (event.getY() + 0.5f); final int action = event.getAction(); switch (action) { case MotionEvent.ACTION_DOWN: case MotionEvent.ACTION_MOVE: final int touchedItem = getDayAtLocation(x, y); if (mTouchedItem != touchedItem) { mTouchedItem = touchedItem; invalidate(); } if (action == MotionEvent.ACTION_DOWN && touchedItem < 0) { // Touch something that's not an item, reject event. return false; } break; case MotionEvent.ACTION_UP: final int clickedDay = getDayAtLocation(x, y); onDayClicked(clickedDay); // Fall through. case MotionEvent.ACTION_CANCEL: // Reset touched day on stream end. mTouchedItem = -1; invalidate(); break; } return true; } @Override protected void onDraw(Canvas canvas) { final int paddingLeft = getPaddingLeft(); final int paddingTop = getPaddingTop(); canvas.translate(paddingLeft, paddingTop); drawMonth(canvas); drawDaysOfWeek(canvas); drawDays(canvas); canvas.translate(-paddingLeft, -paddingTop); } private void drawMonth(Canvas canvas) { final float x = mPaddedWidth / 2f; // Vertically centered within the month header height. final float lineHeight = mMonthPaint.ascent() + mMonthPaint.descent(); final float y = (mMonthHeight - lineHeight) / 2f; canvas.drawText(getTitle().toString(), x, y, mMonthPaint); } private void drawDaysOfWeek(Canvas canvas) { final TextPaint p = mDayOfWeekPaint; final int headerHeight = mMonthHeight; final int rowHeight = mDayOfWeekHeight; final int colWidth = mCellWidth; // Text is vertically centered within the day of week height. final float halfLineHeight = (p.ascent() + p.descent()) / 2f; final int rowCenter = headerHeight + rowHeight / 2; for (int col = 0; col < DAYS_IN_WEEK; col++) { final int colCenter = colWidth * col + colWidth / 2; final int colCenterRtl = colCenter; // if (isLayoutRtl()) { // colCenterRtl = mPaddedWidth - colCenter; // } else { // colCenterRtl = colCenter; // } final int dayOfWeek = (col + mWeekStart) % DAYS_IN_WEEK; final String label = getDayOfWeekLabel(dayOfWeek); canvas.drawText(label, colCenterRtl, rowCenter - halfLineHeight, p); } } private String getDayOfWeekLabel(int dayOfWeek) { mDayOfWeekLabelCalendar.set(Calendar.DAY_OF_WEEK, dayOfWeek); return mDayOfWeekFormatter.format(mDayOfWeekLabelCalendar.getTime()); } /** * Draws the month days. */ private void drawDays(Canvas canvas) { final TextPaint p = mDayPaint; final int headerHeight = mMonthHeight + mDayOfWeekHeight; final int rowHeight = mDayHeight; final int colWidth = mCellWidth; // Text is vertically centered within the row height. final float halfLineHeight = (p.ascent() + p.descent()) / 2f; int rowCenter = headerHeight + rowHeight / 2; for (int day = 1, col = findDayOffset(); day <= mDaysInMonth; day++) { final int colCenter = colWidth * col + colWidth / 2; final int colCenterRtl = colCenter; // if (isLayoutRtl()) { // colCenterRtl = mPaddedWidth - colCenter; // } else { // colCenterRtl = colCenter; // } int stateMask = 0; final boolean isDayEnabled = isDayEnabled(day); // if (isDayEnabled) { // stateMask |= StateSet.VIEW_STATE_ENABLED; // } final boolean isDayActivated = mActivatedDay == day; if (isDayActivated) { // stateMask |= StateSet.VIEW_STATE_ACTIVATED; // Adjust the circle to be centered on the row. canvas.drawCircle(colCenterRtl, rowCenter, mDaySelectorRadius, mDaySelectorPaint); } else if (mTouchedItem == day) { // stateMask |= StateSet.VIEW_STATE_PRESSED; if (isDayEnabled) { // Adjust the circle to be centered on the row. canvas.drawCircle(colCenterRtl, rowCenter, mDaySelectorRadius, mDayHighlightPaint); } } final boolean isDayToday = mToday == day; int dayTextColor = 0; if (isDayToday && !isDayActivated) { dayTextColor = mDaySelectorPaint.getColor(); } else { // final int[] stateSet = StateSet.get(stateMask); // dayTextColor = mDayTextColor.getColorForState(stateSet, 0); } p.setColor(dayTextColor); canvas.drawText(mDayFormatter.format(day), colCenterRtl, rowCenter - halfLineHeight, p); col++; if (col == DAYS_IN_WEEK) { col = 0; rowCenter += rowHeight; } } } private boolean isDayEnabled(int day) { return day >= mEnabledDayStart && day <= mEnabledDayEnd; } private boolean isValidDayOfMonth(int day) { return day >= 1 && day <= mDaysInMonth; } private static boolean isValidDayOfWeek(int day) { return day >= Calendar.SUNDAY && day <= Calendar.SATURDAY; } private static boolean isValidMonth(int month) { return month >= Calendar.JANUARY && month <= Calendar.DECEMBER; } /** * Sets the selected day. * * @param dayOfMonth the selected day of the month, or {@code -1} to clear * the selection */ public void setSelectedDay(int dayOfMonth) { mActivatedDay = dayOfMonth; // Invalidate cached accessibility information. mTouchHelper.invalidateRoot(); invalidate(); } /** * Sets the first day of the week. * * @param weekStart which day the week should start on, valid values are * {@link Calendar#SUNDAY} through {@link Calendar#SATURDAY} */ public void setFirstDayOfWeek(int weekStart) { if (isValidDayOfWeek(weekStart)) { mWeekStart = weekStart; } else { mWeekStart = mCalendar.getFirstDayOfWeek(); } // Invalidate cached accessibility information. mTouchHelper.invalidateRoot(); invalidate(); } /** * Sets all the parameters for displaying this week. * <p> * Parameters have a default value and will only update if a new value is * included, except for focus month, which will always default to no focus * month if no value is passed in. The only required parameter is the week * start. * * @param selectedDay the selected day of the month, or -1 for no selection * @param month the month * @param year the year * @param weekStart which day the week should start on, valid values are * {@link Calendar#SUNDAY} through {@link Calendar#SATURDAY} * @param enabledDayStart the first enabled day * @param enabledDayEnd the last enabled day */ void setMonthParams(int selectedDay, int month, int year, int weekStart, int enabledDayStart, int enabledDayEnd) { mActivatedDay = selectedDay; if (isValidMonth(month)) { mMonth = month; } mYear = year; mCalendar.set(Calendar.MONTH, mMonth); mCalendar.set(Calendar.YEAR, mYear); mCalendar.set(Calendar.DAY_OF_MONTH, 1); mDayOfWeekStart = mCalendar.get(Calendar.DAY_OF_WEEK); if (isValidDayOfWeek(weekStart)) { mWeekStart = weekStart; } else { mWeekStart = mCalendar.getFirstDayOfWeek(); } // Figure out what day today is. final Calendar today = Calendar.getInstance(); mToday = -1; mDaysInMonth = getDaysInMonth(mMonth, mYear); for (int i = 0; i < mDaysInMonth; i++) { final int day = i + 1; if (sameDay(day, today)) { mToday = day; } } mEnabledDayStart = MathUtils.constrain(enabledDayStart, 1, mDaysInMonth); mEnabledDayEnd = MathUtils.constrain(enabledDayEnd, mEnabledDayStart, mDaysInMonth); // Invalidate the old title. mTitle = null; // Invalidate cached accessibility information. mTouchHelper.invalidateRoot(); } private static int getDaysInMonth(int month, int year) { switch (month) { case Calendar.JANUARY: case Calendar.MARCH: case Calendar.MAY: case Calendar.JULY: case Calendar.AUGUST: case Calendar.OCTOBER: case Calendar.DECEMBER: return 31; case Calendar.APRIL: case Calendar.JUNE: case Calendar.SEPTEMBER: case Calendar.NOVEMBER: return 30; case Calendar.FEBRUARY: return (year % 4 == 0) ? 29 : 28; default: throw new IllegalArgumentException("Invalid Month"); } } private boolean sameDay(int day, Calendar today) { return mYear == today.get(Calendar.YEAR) && mMonth == today.get(Calendar.MONTH) && day == today.get(Calendar.DAY_OF_MONTH); } @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { final int preferredHeight = mDesiredDayHeight * MAX_WEEKS_IN_MONTH + mDesiredDayOfWeekHeight + mDesiredMonthHeight + getPaddingTop() + getPaddingBottom(); final int preferredWidth = mDesiredCellWidth * DAYS_IN_WEEK + getPaddingStart() + getPaddingEnd(); final int resolvedWidth = resolveSize(preferredWidth, widthMeasureSpec); final int resolvedHeight = resolveSize(preferredHeight, heightMeasureSpec); setMeasuredDimension(resolvedWidth, resolvedHeight); } @Override public void onRtlPropertiesChanged(int layoutDirection) { super.onRtlPropertiesChanged(layoutDirection); requestLayout(); } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { if (!changed) { return; } // Let's initialize a completely reasonable number of variables. final int w = right - left; final int h = bottom - top; final int paddingLeft = getPaddingLeft(); final int paddingTop = getPaddingTop(); final int paddingRight = getPaddingRight(); final int paddingBottom = getPaddingBottom(); final int paddedRight = w - paddingRight; final int paddedBottom = h - paddingBottom; final int paddedWidth = paddedRight - paddingLeft; final int paddedHeight = paddedBottom - paddingTop; if (paddedWidth == mPaddedWidth || paddedHeight == mPaddedHeight) { return; } mPaddedWidth = paddedWidth; mPaddedHeight = paddedHeight; // We may have been laid out smaller than our preferred size. If so, // scale all dimensions to fit. final int measuredPaddedHeight = getMeasuredHeight() - paddingTop - paddingBottom; final float scaleH = paddedHeight / (float) measuredPaddedHeight; final int monthHeight = (int) (mDesiredMonthHeight * scaleH); final int cellWidth = mPaddedWidth / DAYS_IN_WEEK; mMonthHeight = monthHeight; mDayOfWeekHeight = (int) (mDesiredDayOfWeekHeight * scaleH); mDayHeight = (int) (mDesiredDayHeight * scaleH); mCellWidth = cellWidth; // Compute the largest day selector radius that's still within the clip // bounds and desired selector radius. final int maxSelectorWidth = cellWidth / 2 + Math.min(paddingLeft, paddingRight); final int maxSelectorHeight = mDayHeight / 2 + paddingBottom; mDaySelectorRadius = Math.min(mDesiredDaySelectorRadius, Math.min(maxSelectorWidth, maxSelectorHeight)); // Invalidate cached accessibility information. mTouchHelper.invalidateRoot(); } private int findDayOffset() { final int offset = mDayOfWeekStart - mWeekStart; if (mDayOfWeekStart < mWeekStart) { return offset + DAYS_IN_WEEK; } return offset; } /** * Calculates the day of the month at the specified touch position. Returns * the day of the month or -1 if the position wasn't in a valid day. * * @param x the x position of the touch event * @param y the y position of the touch event * @return the day of the month at (x, y), or -1 if the position wasn't in * a valid day */ private int getDayAtLocation(int x, int y) { final int paddedX = x - getPaddingLeft(); if (paddedX < 0 || paddedX >= mPaddedWidth) { return -1; } final int headerHeight = mMonthHeight + mDayOfWeekHeight; final int paddedY = y - getPaddingTop(); if (paddedY < headerHeight || paddedY >= mPaddedHeight) { return -1; } // Adjust for RTL after applying padding. final int paddedXRtl = paddedX; // if (isLayoutRtl()) { // paddedXRtl = mPaddedWidth - paddedX; // } else { // paddedXRtl = paddedX; // } final int row = (paddedY - headerHeight) / mDayHeight; final int col = (paddedXRtl * DAYS_IN_WEEK) / mPaddedWidth; final int index = col + row * DAYS_IN_WEEK; final int day = index + 1 - findDayOffset(); if (!isValidDayOfMonth(day)) { return -1; } return day; } /** * Calculates the bounds of the specified day. * * @param id the day of the month * @param outBounds the rect to populate with bounds */ private boolean getBoundsForDay(int id, Rect outBounds) { if (!isValidDayOfMonth(id)) { return false; } final int index = id - 1 + findDayOffset(); // Compute left edge, taking into account RTL. final int col = index % DAYS_IN_WEEK; final int colWidth = mCellWidth; final int left; // if (isLayoutRtl()) { // left = getWidth() - getPaddingRight() - (col + 1) * colWidth; // } else { // left = getPaddingLeft() + col * colWidth; // } left = getPaddingLeft() + col * colWidth; // Compute top edge. final int row = index / DAYS_IN_WEEK; final int rowHeight = mDayHeight; final int headerHeight = mMonthHeight + mDayOfWeekHeight; final int top = getPaddingTop() + headerHeight + row * rowHeight; outBounds.set(left, top, left + colWidth, top + rowHeight); return true; } /** * Called when the user clicks on a day. Handles callbacks to the * {@link OnDayClickListener} if one is set. * * @param day the day that was clicked */ private boolean onDayClicked(int day) { if (!isValidDayOfMonth(day) || !isDayEnabled(day)) { return false; } if (mOnDayClickListener != null) { final Calendar date = Calendar.getInstance(); date.set(mYear, mMonth, day); mOnDayClickListener.onDayClick(this, date); } // This is a no-op if accessibility is turned off. mTouchHelper.sendEventForVirtualView(day, AccessibilityEvent.TYPE_VIEW_CLICKED); return true; } /** * Provides a virtual view hierarchy for interfacing with an accessibility * service. */ private class MonthViewTouchHelper extends ExploreByTouchHelper { private static final String DATE_FORMAT = "dd MMMM yyyy"; private final Rect mTempRect = new Rect(); private final Calendar mTempCalendar = Calendar.getInstance(); public MonthViewTouchHelper(View host) { super(host); } @Override protected int getVirtualViewAt(float x, float y) { final int day = getDayAtLocation((int) (x + 0.5f), (int) (y + 0.5f)); if (day != -1) { return day; } return ExploreByTouchHelper.INVALID_ID; } @Override protected void getVisibleVirtualViews(List<Integer> virtualViewIds) { for (int day = 1; day <= mDaysInMonth; day++) { virtualViewIds.add(day); } } @Override protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) { event.setContentDescription(getDayDescription(virtualViewId)); } @Override protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfoCompat node) { final boolean hasBounds = getBoundsForDay(virtualViewId, mTempRect); if (!hasBounds) { // The day is invalid, kill the node. mTempRect.setEmpty(); node.setContentDescription(""); node.setBoundsInParent(mTempRect); node.setVisibleToUser(false); return; } node.setText(getDayText(virtualViewId)); node.setContentDescription(getDayDescription(virtualViewId)); node.setBoundsInParent(mTempRect); final boolean isDayEnabled = isDayEnabled(virtualViewId); if (isDayEnabled) { node.addAction(AccessibilityNodeInfoCompat.AccessibilityActionCompat.ACTION_CLICK); } node.setEnabled(isDayEnabled); if (virtualViewId == mActivatedDay) { // TODO: This should use activated once that's supported. node.setChecked(true); } } @Override protected boolean onPerformActionForVirtualView(int virtualViewId, int action, Bundle arguments) { switch (action) { case AccessibilityNodeInfo.ACTION_CLICK: return onDayClicked(virtualViewId); } return false; } /** * Generates a description for a given virtual view. * * @param id the day to generate a description for * @return a description of the virtual view */ private CharSequence getDayDescription(int id) { if (isValidDayOfMonth(id)) { mTempCalendar.set(mYear, mMonth, id); return DateFormat.format(DATE_FORMAT, mTempCalendar.getTimeInMillis()); } return ""; } /** * Generates displayed text for a given virtual view. * * @param id the day to generate text for * @return the visible text of the virtual view */ private CharSequence getDayText(int id) { if (isValidDayOfMonth(id)) { return mDayFormatter.format(id); } return null; } } /** * Handles callbacks when the user clicks on a time object. */ public interface OnDayClickListener { void onDayClick(SimpleMonthView view, Calendar day); } }