Java tutorial
/* * Copyright (C) 2013 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.doomonafireball.betterpickers.radialtimepicker; import com.doomonafireball.betterpickers.HapticFeedbackController; import com.doomonafireball.betterpickers.R; import com.nineoldandroids.animation.AnimatorSet; import com.nineoldandroids.animation.ObjectAnimator; import com.nineoldandroids.view.ViewHelper; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.Resources; import android.os.Bundle; import android.os.Handler; import android.os.SystemClock; import android.support.v4.view.accessibility.AccessibilityManagerCompat; import android.text.format.DateUtils; import android.text.format.Time; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.view.ViewConfiguration; import android.view.ViewGroup; import android.view.accessibility.AccessibilityEvent; import android.view.accessibility.AccessibilityManager; import android.view.accessibility.AccessibilityNodeInfo; import android.widget.FrameLayout; public class RadialPickerLayout extends FrameLayout implements OnTouchListener { private static final String TAG = "RadialPickerLayout"; private final int TOUCH_SLOP; private final int TAP_TIMEOUT; private static final int VISIBLE_DEGREES_STEP_SIZE = 30; private static final int HOUR_VALUE_TO_DEGREES_STEP_SIZE = VISIBLE_DEGREES_STEP_SIZE; private static final int MINUTE_VALUE_TO_DEGREES_STEP_SIZE = 6; private static final int HOUR_INDEX = RadialTimePickerDialog.HOUR_INDEX; private static final int MINUTE_INDEX = RadialTimePickerDialog.MINUTE_INDEX; private static final int AMPM_INDEX = RadialTimePickerDialog.AMPM_INDEX; private static final int ENABLE_PICKER_INDEX = RadialTimePickerDialog.ENABLE_PICKER_INDEX; private static final int AM = RadialTimePickerDialog.AM; private static final int PM = RadialTimePickerDialog.PM; private int mLastValueSelected; private HapticFeedbackController mHapticFeedbackController; private OnValueSelectedListener mListener; private boolean mTimeInitialized; private int mCurrentHoursOfDay; private int mCurrentMinutes; private boolean mIs24HourMode; private boolean mHideAmPm; private int mCurrentItemShowing; private CircleView mCircleView; private AmPmCirclesView mAmPmCirclesView; private RadialTextsView mHourRadialTextsView; private RadialTextsView mMinuteRadialTextsView; private RadialSelectorView mHourRadialSelectorView; private RadialSelectorView mMinuteRadialSelectorView; private View mGrayBox; private int[] mSnapPrefer30sMap; private boolean mInputEnabled; private int mIsTouchingAmOrPm = -1; private boolean mDoingMove; private boolean mDoingTouch; private int mDownDegrees; private float mDownX; private float mDownY; private AccessibilityManager mAccessibilityManager; private AnimatorSet mTransition; private Handler mHandler = new Handler(); public interface OnValueSelectedListener { void onValueSelected(int pickerIndex, int newValue, boolean autoAdvance); } public RadialPickerLayout(Context context, AttributeSet attrs) { super(context, attrs); setOnTouchListener(this); ViewConfiguration vc = ViewConfiguration.get(context); TOUCH_SLOP = vc.getScaledTouchSlop(); TAP_TIMEOUT = ViewConfiguration.getTapTimeout(); mDoingMove = false; mCircleView = new CircleView(context); addView(mCircleView); mAmPmCirclesView = new AmPmCirclesView(context); addView(mAmPmCirclesView); mHourRadialTextsView = new RadialTextsView(context); addView(mHourRadialTextsView); mMinuteRadialTextsView = new RadialTextsView(context); addView(mMinuteRadialTextsView); mHourRadialSelectorView = new RadialSelectorView(context); addView(mHourRadialSelectorView); mMinuteRadialSelectorView = new RadialSelectorView(context); addView(mMinuteRadialSelectorView); // Prepare mapping to snap touchable degrees to selectable degrees. preparePrefer30sMap(); mLastValueSelected = -1; mInputEnabled = true; mGrayBox = new View(context); mGrayBox.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); mGrayBox.setBackgroundColor(getResources().getColor(R.color.transparent_black)); mGrayBox.setVisibility(View.INVISIBLE); addView(mGrayBox); mAccessibilityManager = (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE); mTimeInitialized = false; } /** * Measure the view to end up as a square, based on the minimum of the height and width. */ @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int measuredWidth = MeasureSpec.getSize(widthMeasureSpec); int widthMode = MeasureSpec.getMode(widthMeasureSpec); int measuredHeight = MeasureSpec.getSize(heightMeasureSpec); int heightMode = MeasureSpec.getMode(heightMeasureSpec); int minDimension = Math.min(measuredWidth, measuredHeight); super.onMeasure(MeasureSpec.makeMeasureSpec(minDimension, widthMode), MeasureSpec.makeMeasureSpec(minDimension, heightMode)); } public void setOnValueSelectedListener(OnValueSelectedListener listener) { mListener = listener; } /** * Initialize the Layout with starting values. */ public void initialize(Context context, HapticFeedbackController hapticFeedbackController, int initialHoursOfDay, int initialMinutes, boolean is24HourMode) { if (mTimeInitialized) { Log.e(TAG, "Time has already been initialized."); return; } mHapticFeedbackController = hapticFeedbackController; mIs24HourMode = is24HourMode; mHideAmPm = AccessibilityManagerCompat.isTouchExplorationEnabled(mAccessibilityManager) ? true : mIs24HourMode; // Initialize the circle and AM/PM circles if applicable. mCircleView.initialize(context, mHideAmPm); mCircleView.invalidate(); if (!mHideAmPm) { mAmPmCirclesView.initialize(context, initialHoursOfDay < 12 ? AM : PM); mAmPmCirclesView.invalidate(); } // Initialize the hours and minutes numbers. Resources res = context.getResources(); int[] hours = { 12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; int[] hours24 = { 0, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 }; int[] minutes = { 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 }; String[] hoursTexts = new String[12]; String[] innerHoursTexts = new String[12]; String[] minutesTexts = new String[12]; for (int i = 0; i < 12; i++) { hoursTexts[i] = is24HourMode ? String.format("%02d", hours24[i]) : String.format("%d", hours[i]); innerHoursTexts[i] = String.format("%d", hours[i]); minutesTexts[i] = String.format("%02d", minutes[i]); } mHourRadialTextsView.initialize(res, hoursTexts, (is24HourMode ? innerHoursTexts : null), mHideAmPm, true); mHourRadialTextsView.invalidate(); mMinuteRadialTextsView.initialize(res, minutesTexts, null, mHideAmPm, false); mMinuteRadialTextsView.invalidate(); // Initialize the currently-selected hour and minute. setValueForItem(HOUR_INDEX, initialHoursOfDay); setValueForItem(MINUTE_INDEX, initialMinutes); int hourDegrees = (initialHoursOfDay % 12) * HOUR_VALUE_TO_DEGREES_STEP_SIZE; mHourRadialSelectorView.initialize(context, mHideAmPm, is24HourMode, true, hourDegrees, isHourInnerCircle(initialHoursOfDay)); int minuteDegrees = initialMinutes * MINUTE_VALUE_TO_DEGREES_STEP_SIZE; mMinuteRadialSelectorView.initialize(context, mHideAmPm, false, false, minuteDegrees, false); mTimeInitialized = true; } /* package */ void setTheme(Context context, boolean themeDark) { mCircleView.setTheme(context, themeDark); mAmPmCirclesView.setTheme(context, themeDark); mHourRadialTextsView.setTheme(context, themeDark); mMinuteRadialTextsView.setTheme(context, themeDark); mHourRadialSelectorView.setTheme(context, themeDark); mMinuteRadialSelectorView.setTheme(context, themeDark); } public void setTime(int hours, int minutes) { setItem(HOUR_INDEX, hours); setItem(MINUTE_INDEX, minutes); } /** * Set either the hour or the minute. Will set the internal value, and set the selection. */ private void setItem(int index, int value) { if (index == HOUR_INDEX) { setValueForItem(HOUR_INDEX, value); int hourDegrees = (value % 12) * HOUR_VALUE_TO_DEGREES_STEP_SIZE; mHourRadialSelectorView.setSelection(hourDegrees, isHourInnerCircle(value), false); mHourRadialSelectorView.invalidate(); } else if (index == MINUTE_INDEX) { setValueForItem(MINUTE_INDEX, value); int minuteDegrees = value * MINUTE_VALUE_TO_DEGREES_STEP_SIZE; mMinuteRadialSelectorView.setSelection(minuteDegrees, false, false); mMinuteRadialSelectorView.invalidate(); } } /** * Check if a given hour appears in the outer circle or the inner circle * * @return true if the hour is in the inner circle, false if it's in the outer circle. */ private boolean isHourInnerCircle(int hourOfDay) { // We'll have the 00 hours on the outside circle. return mIs24HourMode && (hourOfDay <= 12 && hourOfDay != 0); } public int getHours() { return mCurrentHoursOfDay; } public int getMinutes() { return mCurrentMinutes; } /** * If the hours are showing, return the current hour. If the minutes are showing, return the current minute. */ private int getCurrentlyShowingValue() { int currentIndex = getCurrentItemShowing(); if (currentIndex == HOUR_INDEX) { return mCurrentHoursOfDay; } else if (currentIndex == MINUTE_INDEX) { return mCurrentMinutes; } else { return -1; } } public int getIsCurrentlyAmOrPm() { if (mCurrentHoursOfDay < 12) { return AM; } else if (mCurrentHoursOfDay < 24) { return PM; } return -1; } /** * Set the internal value for the hour, minute, or AM/PM. */ private void setValueForItem(int index, int value) { if (index == HOUR_INDEX) { mCurrentHoursOfDay = value; } else if (index == MINUTE_INDEX) { mCurrentMinutes = value; } else if (index == AMPM_INDEX) { if (value == AM) { mCurrentHoursOfDay = mCurrentHoursOfDay % 12; } else if (value == PM) { mCurrentHoursOfDay = (mCurrentHoursOfDay % 12) + 12; } } } /** * Set the internal value as either AM or PM, and update the AM/PM circle displays. * @param amOrPm */ public void setAmOrPm(int amOrPm) { mAmPmCirclesView.setAmOrPm(amOrPm); mAmPmCirclesView.invalidate(); setValueForItem(AMPM_INDEX, amOrPm); } /** * Split up the 360 degrees of the circle among the 60 selectable values. Assigns a larger selectable area to each * of the 12 visible values, such that the ratio of space apportioned to a visible value : space apportioned to a * non-visible value will be 14 : 4. E.g. the output of 30 degrees should have a higher range of input associated * with it than the output of 24 degrees, because 30 degrees corresponds to a visible number on the clock circle (5 * on the minutes, 1 or 13 on the hours). */ private void preparePrefer30sMap() { // We'll split up the visible output and the non-visible output such that each visible // output will correspond to a range of 14 associated input degrees, and each non-visible // output will correspond to a range of 4 associate input degrees, so visible numbers // are more than 3 times easier to get than non-visible numbers: // {354-359,0-7}:0, {8-11}:6, {12-15}:12, {16-19}:18, {20-23}:24, {24-37}:30, etc. // // If an output of 30 degrees should correspond to a range of 14 associated degrees, then // we'll need any input between 24 - 37 to snap to 30. Working out from there, 20-23 should // snap to 24, while 38-41 should snap to 36. This is somewhat counter-intuitive, that you // can be touching 36 degrees but have the selection snapped to 30 degrees; however, this // inconsistency isn't noticeable at such fine-grained degrees, and it affords us the // ability to aggressively prefer the visible values by a factor of more than 3:1, which // greatly contributes to the selectability of these values. // Our input will be 0 through 360. mSnapPrefer30sMap = new int[361]; // The first output is 0, and each following output will increment by 6 {0, 6, 12, ...}. int snappedOutputDegrees = 0; // Count of how many inputs we've designated to the specified output. int count = 1; // How many input we expect for a specified output. This will be 14 for output divisible // by 30, and 4 for the remaining output. We'll special case the outputs of 0 and 360, so // the caller can decide which they need. int expectedCount = 8; // Iterate through the input. for (int degrees = 0; degrees < 361; degrees++) { // Save the input-output mapping. mSnapPrefer30sMap[degrees] = snappedOutputDegrees; // If this is the last input for the specified output, calculate the next output and // the next expected count. if (count == expectedCount) { snappedOutputDegrees += 6; if (snappedOutputDegrees == 360) { expectedCount = 7; } else if (snappedOutputDegrees % 30 == 0) { expectedCount = 14; } else { expectedCount = 4; } count = 1; } else { count++; } } } /** * Returns mapping of any input degrees (0 to 360) to one of 60 selectable output degrees, where the degrees * corresponding to visible numbers (i.e. those divisible by 30) will be weighted heavier than the degrees * corresponding to non-visible numbers. See {@link #preparePrefer30sMap()} documentation for the rationale and * generation of the mapping. */ private int snapPrefer30s(int degrees) { if (mSnapPrefer30sMap == null) { return -1; } return mSnapPrefer30sMap[degrees]; } /** * Returns mapping of any input degrees (0 to 360) to one of 12 visible output degrees (all multiples of 30), where * the input will be "snapped" to the closest visible degrees. * * @param degrees The input degrees * @param forceAboveOrBelow The output may be forced to either the higher or lower step, or may be allowed to snap * to whichever is closer. Use 1 to force strictly higher, -1 to force strictly lower, and 0 to snap to the closer * one. * @return output degrees, will be a multiple of 30 */ private int snapOnly30s(int degrees, int forceHigherOrLower) { int stepSize = HOUR_VALUE_TO_DEGREES_STEP_SIZE; int floor = (degrees / stepSize) * stepSize; int ceiling = floor + stepSize; if (forceHigherOrLower == 1) { degrees = ceiling; } else if (forceHigherOrLower == -1) { if (degrees == floor) { floor -= stepSize; } degrees = floor; } else { if ((degrees - floor) < (ceiling - degrees)) { degrees = floor; } else { degrees = ceiling; } } return degrees; } /** * For the currently showing view (either hours or minutes), re-calculate the position for the selector, and redraw * it at that position. The input degrees will be snapped to a selectable value. * * @param degrees Degrees which should be selected. * @param isInnerCircle Whether the selection should be in the inner circle; will be ignored if there is no inner * circle. * @param forceToVisibleValue Even if the currently-showing circle allows for fine-grained selection (i.e. minutes), * force the selection to one of the visibly-showing values. * @param forceDrawDot The dot in the circle will generally only be shown when the selection is on non-visible * values, but use this to force the dot to be shown. * @return The value that was selected, i.e. 0-23 for hours, 0-59 for minutes. */ private int reselectSelector(int degrees, boolean isInnerCircle, boolean forceToVisibleValue, boolean forceDrawDot) { if (degrees == -1) { return -1; } int currentShowing = getCurrentItemShowing(); int stepSize; boolean allowFineGrained = !forceToVisibleValue && (currentShowing == MINUTE_INDEX); if (allowFineGrained) { degrees = snapPrefer30s(degrees); } else { degrees = snapOnly30s(degrees, 0); } RadialSelectorView radialSelectorView; if (currentShowing == HOUR_INDEX) { radialSelectorView = mHourRadialSelectorView; stepSize = HOUR_VALUE_TO_DEGREES_STEP_SIZE; } else { radialSelectorView = mMinuteRadialSelectorView; stepSize = MINUTE_VALUE_TO_DEGREES_STEP_SIZE; } radialSelectorView.setSelection(degrees, isInnerCircle, forceDrawDot); radialSelectorView.invalidate(); if (currentShowing == HOUR_INDEX) { if (mIs24HourMode) { if (degrees == 0 && isInnerCircle) { degrees = 360; } else if (degrees == 360 && !isInnerCircle) { degrees = 0; } } else if (degrees == 0) { degrees = 360; } } else if (degrees == 360 && currentShowing == MINUTE_INDEX) { degrees = 0; } int value = degrees / stepSize; if (currentShowing == HOUR_INDEX && mIs24HourMode && !isInnerCircle && degrees != 0) { value += 12; } return value; } /** * Calculate the degrees within the circle that corresponds to the specified coordinates, if the coordinates are * within the range that will trigger a selection. * * @param pointX The x coordinate. * @param pointY The y coordinate. * @param forceLegal Force the selection to be legal, regardless of how far the coordinates are from the actual * numbers. * @param isInnerCircle If the selection may be in the inner circle, pass in a size-1 boolean array here, inside * which the value will be true if the selection is in the inner circle, and false if in the outer circle. * @return Degrees from 0 to 360, if the selection was within the legal range. -1 if not. */ private int getDegreesFromCoords(float pointX, float pointY, boolean forceLegal, final Boolean[] isInnerCircle) { int currentItem = getCurrentItemShowing(); if (currentItem == HOUR_INDEX) { return mHourRadialSelectorView.getDegreesFromCoords(pointX, pointY, forceLegal, isInnerCircle); } else if (currentItem == MINUTE_INDEX) { return mMinuteRadialSelectorView.getDegreesFromCoords(pointX, pointY, forceLegal, isInnerCircle); } else { return -1; } } /** * Get the item (hours or minutes) that is currently showing. */ public int getCurrentItemShowing() { if (mCurrentItemShowing != HOUR_INDEX && mCurrentItemShowing != MINUTE_INDEX) { Log.e(TAG, "Current item showing was unfortunately set to " + mCurrentItemShowing); return -1; } return mCurrentItemShowing; } /** * Set either minutes or hours as showing. * * @param animate True to animate the transition, false to show with no animation. */ public void setCurrentItemShowing(int index, boolean animate) { if (index != HOUR_INDEX && index != MINUTE_INDEX) { Log.e(TAG, "TimePicker does not support view at index " + index); return; } int lastIndex = getCurrentItemShowing(); mCurrentItemShowing = index; if (animate && (index != lastIndex)) { ObjectAnimator[] anims = new ObjectAnimator[4]; if (index == MINUTE_INDEX) { anims[0] = mHourRadialTextsView.getDisappearAnimator(); anims[1] = mHourRadialSelectorView.getDisappearAnimator(); anims[2] = mMinuteRadialTextsView.getReappearAnimator(); anims[3] = mMinuteRadialSelectorView.getReappearAnimator(); } else if (index == HOUR_INDEX) { anims[0] = mHourRadialTextsView.getReappearAnimator(); anims[1] = mHourRadialSelectorView.getReappearAnimator(); anims[2] = mMinuteRadialTextsView.getDisappearAnimator(); anims[3] = mMinuteRadialSelectorView.getDisappearAnimator(); } if (mTransition != null && mTransition.isRunning()) { mTransition.end(); } mTransition = new AnimatorSet(); mTransition.playTogether(anims); mTransition.start(); } else { int hourAlpha = (index == HOUR_INDEX) ? 255 : 0; int minuteAlpha = (index == MINUTE_INDEX) ? 255 : 0; ViewHelper.setAlpha(mHourRadialTextsView, hourAlpha); ViewHelper.setAlpha(mHourRadialSelectorView, hourAlpha); ViewHelper.setAlpha(mMinuteRadialTextsView, minuteAlpha); ViewHelper.setAlpha(mMinuteRadialSelectorView, minuteAlpha); } } @Override public boolean onTouch(View v, MotionEvent event) { final float eventX = event.getX(); final float eventY = event.getY(); int degrees; int value; final Boolean[] isInnerCircle = new Boolean[1]; isInnerCircle[0] = false; switch (event.getAction()) { case MotionEvent.ACTION_DOWN: if (!mInputEnabled) { return true; } mDownX = eventX; mDownY = eventY; mLastValueSelected = -1; mDoingMove = false; mDoingTouch = true; // If we're showing the AM/PM, check to see if the user is touching it. if (!mHideAmPm) { mIsTouchingAmOrPm = mAmPmCirclesView.getIsTouchingAmOrPm(eventX, eventY); } else { mIsTouchingAmOrPm = -1; } if (mIsTouchingAmOrPm == AM || mIsTouchingAmOrPm == PM) { // If the touch is on AM or PM, set it as "touched" after the tapTimeout // in case the user moves their finger quickly. mHapticFeedbackController.tryVibrate(); mDownDegrees = -1; mHandler.postDelayed(new Runnable() { @Override public void run() { mAmPmCirclesView.setAmOrPmPressed(mIsTouchingAmOrPm); mAmPmCirclesView.invalidate(); } }, TAP_TIMEOUT); } else { // If we're in accessibility mode, force the touch to be legal. Otherwise, // it will only register within the given touch target zone. boolean forceLegal = AccessibilityManagerCompat.isTouchExplorationEnabled(mAccessibilityManager); // Calculate the degrees that is currently being touched. mDownDegrees = getDegreesFromCoords(eventX, eventY, forceLegal, isInnerCircle); if (mDownDegrees != -1) { // If it's a legal touch, set that number as "selected" after the // tapTimeout in case the user moves their finger quickly. mHapticFeedbackController.tryVibrate(); mHandler.postDelayed(new Runnable() { @Override public void run() { mDoingMove = true; int value = reselectSelector(mDownDegrees, isInnerCircle[0], false, true); mLastValueSelected = value; mListener.onValueSelected(getCurrentItemShowing(), value, false); } }, TAP_TIMEOUT); } } return true; case MotionEvent.ACTION_MOVE: if (!mInputEnabled) { // We shouldn't be in this state, because input is disabled. Log.e(TAG, "Input was disabled, but received ACTION_MOVE."); return true; } float dY = Math.abs(eventY - mDownY); float dX = Math.abs(eventX - mDownX); if (!mDoingMove && dX <= TOUCH_SLOP && dY <= TOUCH_SLOP) { // Hasn't registered down yet, just slight, accidental movement of finger. break; } // If we're in the middle of touching down on AM or PM, check if we still are. // If so, no-op. If not, remove its pressed state. Either way, no need to check // for touches on the other circle. if (mIsTouchingAmOrPm == AM || mIsTouchingAmOrPm == PM) { mHandler.removeCallbacksAndMessages(null); int isTouchingAmOrPm = mAmPmCirclesView.getIsTouchingAmOrPm(eventX, eventY); if (isTouchingAmOrPm != mIsTouchingAmOrPm) { mAmPmCirclesView.setAmOrPmPressed(-1); mAmPmCirclesView.invalidate(); mIsTouchingAmOrPm = -1; } break; } if (mDownDegrees == -1) { // Original down was illegal, so no movement will register. break; } // We're doing a move along the circle, so move the selection as appropriate. mDoingMove = true; mHandler.removeCallbacksAndMessages(null); degrees = getDegreesFromCoords(eventX, eventY, true, isInnerCircle); if (degrees != -1) { value = reselectSelector(degrees, isInnerCircle[0], false, true); if (value != mLastValueSelected) { mHapticFeedbackController.tryVibrate(); mLastValueSelected = value; mListener.onValueSelected(getCurrentItemShowing(), value, false); } } return true; case MotionEvent.ACTION_UP: if (!mInputEnabled) { // If our touch input was disabled, tell the listener to re-enable us. Log.d(TAG, "Input was disabled, but received ACTION_UP."); mListener.onValueSelected(ENABLE_PICKER_INDEX, 1, false); return true; } mHandler.removeCallbacksAndMessages(null); mDoingTouch = false; // If we're touching AM or PM, set it as selected, and tell the listener. if (mIsTouchingAmOrPm == AM || mIsTouchingAmOrPm == PM) { int isTouchingAmOrPm = mAmPmCirclesView.getIsTouchingAmOrPm(eventX, eventY); mAmPmCirclesView.setAmOrPmPressed(-1); mAmPmCirclesView.invalidate(); if (isTouchingAmOrPm == mIsTouchingAmOrPm) { mAmPmCirclesView.setAmOrPm(isTouchingAmOrPm); if (getIsCurrentlyAmOrPm() != isTouchingAmOrPm) { mListener.onValueSelected(AMPM_INDEX, mIsTouchingAmOrPm, false); setValueForItem(AMPM_INDEX, isTouchingAmOrPm); } } mIsTouchingAmOrPm = -1; break; } // If we have a legal degrees selected, set the value and tell the listener. if (mDownDegrees != -1) { degrees = getDegreesFromCoords(eventX, eventY, mDoingMove, isInnerCircle); if (degrees != -1) { value = reselectSelector(degrees, isInnerCircle[0], !mDoingMove, false); if (getCurrentItemShowing() == HOUR_INDEX && !mIs24HourMode) { int amOrPm = getIsCurrentlyAmOrPm(); if (amOrPm == AM && value == 12) { value = 0; } else if (amOrPm == PM && value != 12) { value += 12; } } setValueForItem(getCurrentItemShowing(), value); mListener.onValueSelected(getCurrentItemShowing(), value, true); } } mDoingMove = false; return true; default: break; } return false; } /** * Set touch input as enabled or disabled, for use with keyboard mode. */ public boolean trySettingInputEnabled(boolean inputEnabled) { if (mDoingTouch && !inputEnabled) { // If we're trying to disable input, but we're in the middle of a touch event, // we'll allow the touch event to continue before disabling input. return false; } mInputEnabled = inputEnabled; mGrayBox.setVisibility(inputEnabled ? View.INVISIBLE : View.VISIBLE); return true; } /** * Necessary for accessibility, to ensure we support "scrolling" forward and backward in the circle. */ @Override public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { super.onInitializeAccessibilityNodeInfo(info); info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD); info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD); } /** * Announce the currently-selected time when launched. */ @Override public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) { // Clear the event's current text so that only the current time will be spoken. event.getText().clear(); Time time = new Time(); time.hour = getHours(); time.minute = getMinutes(); long millis = time.normalize(true); int flags = DateUtils.FORMAT_SHOW_TIME; if (mIs24HourMode) { flags |= DateUtils.FORMAT_24HOUR; } String timeString = DateUtils.formatDateTime(getContext(), millis, flags); event.getText().add(timeString); return true; } return super.dispatchPopulateAccessibilityEvent(event); } /** * When scroll forward/backward events are received, jump the time to the higher/lower discrete, visible value on * the circle. */ @SuppressLint("NewApi") @Override public boolean performAccessibilityAction(int action, Bundle arguments) { if (super.performAccessibilityAction(action, arguments)) { return true; } int changeMultiplier = 0; if (action == AccessibilityNodeInfo.ACTION_SCROLL_FORWARD) { changeMultiplier = 1; } else if (action == AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD) { changeMultiplier = -1; } if (changeMultiplier != 0) { int value = getCurrentlyShowingValue(); int stepSize = 0; int currentItemShowing = getCurrentItemShowing(); if (currentItemShowing == HOUR_INDEX) { stepSize = HOUR_VALUE_TO_DEGREES_STEP_SIZE; value %= 12; } else if (currentItemShowing == MINUTE_INDEX) { stepSize = MINUTE_VALUE_TO_DEGREES_STEP_SIZE; } int degrees = value * stepSize; degrees = snapOnly30s(degrees, changeMultiplier); value = degrees / stepSize; int maxValue = 0; int minValue = 0; if (currentItemShowing == HOUR_INDEX) { if (mIs24HourMode) { maxValue = 23; } else { maxValue = 12; minValue = 1; } } else { maxValue = 55; } if (value > maxValue) { // If we scrolled forward past the highest number, wrap around to the lowest. value = minValue; } else if (value < minValue) { // If we scrolled backward past the lowest number, wrap around to the highest. value = maxValue; } setItem(currentItemShowing, value); mListener.onValueSelected(currentItemShowing, value, false); return true; } return false; } }