NumberPicker.java revision fe41ce4ef97e7da585fdbf06988da8047e72b9f6
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.widget; 18 19import android.annotation.Widget; 20import android.content.Context; 21import android.content.res.ColorStateList; 22import android.content.res.TypedArray; 23import android.graphics.Canvas; 24import android.graphics.Color; 25import android.graphics.Paint; 26import android.graphics.Paint.Align; 27import android.graphics.Rect; 28import android.graphics.drawable.Drawable; 29import android.text.InputFilter; 30import android.text.InputType; 31import android.text.Spanned; 32import android.text.TextUtils; 33import android.text.method.NumberKeyListener; 34import android.util.AttributeSet; 35import android.util.SparseArray; 36import android.util.TypedValue; 37import android.view.KeyEvent; 38import android.view.LayoutInflater; 39import android.view.LayoutInflater.Filter; 40import android.view.MotionEvent; 41import android.view.VelocityTracker; 42import android.view.View; 43import android.view.ViewConfiguration; 44import android.view.accessibility.AccessibilityEvent; 45import android.view.accessibility.AccessibilityManager; 46import android.view.accessibility.AccessibilityNodeInfo; 47import android.view.accessibility.AccessibilityNodeProvider; 48import android.view.animation.DecelerateInterpolator; 49import android.view.inputmethod.EditorInfo; 50import android.view.inputmethod.InputMethodManager; 51 52import com.android.internal.R; 53 54import java.util.ArrayList; 55import java.util.Collections; 56import java.util.List; 57 58/** 59 * A widget that enables the user to select a number form a predefined range. 60 * There are two flavors of this widget and which one is presented to the user 61 * depends on the current theme. 62 * <ul> 63 * <li> 64 * If the current theme is derived from {@link android.R.style#Theme} the widget 65 * presents the current value as an editable input field with an increment button 66 * above and a decrement button below. Long pressing the buttons allows for a quick 67 * change of the current value. Tapping on the input field allows to type in 68 * a desired value. 69 * </li> 70 * <li> 71 * If the current theme is derived from {@link android.R.style#Theme_Holo} or 72 * {@link android.R.style#Theme_Holo_Light} the widget presents the current 73 * value as an editable input field with a lesser value above and a greater 74 * value below. Tapping on the lesser or greater value selects it by animating 75 * the number axis up or down to make the chosen value current. Flinging up 76 * or down allows for multiple increments or decrements of the current value. 77 * Long pressing on the lesser and greater values also allows for a quick change 78 * of the current value. Tapping on the current value allows to type in a 79 * desired value. 80 * </li> 81 * </ul> 82 * <p> 83 * For an example of using this widget, see {@link android.widget.TimePicker}. 84 * </p> 85 */ 86@Widget 87public class NumberPicker extends LinearLayout { 88 89 /** 90 * The number of items show in the selector wheel. 91 */ 92 private static final int SELECTOR_WHEEL_ITEM_COUNT = 3; 93 94 /** 95 * The default update interval during long press. 96 */ 97 private static final long DEFAULT_LONG_PRESS_UPDATE_INTERVAL = 300; 98 99 /** 100 * The index of the middle selector item. 101 */ 102 private static final int SELECTOR_MIDDLE_ITEM_INDEX = SELECTOR_WHEEL_ITEM_COUNT / 2; 103 104 /** 105 * The coefficient by which to adjust (divide) the max fling velocity. 106 */ 107 private static final int SELECTOR_MAX_FLING_VELOCITY_ADJUSTMENT = 8; 108 109 /** 110 * The the duration for adjusting the selector wheel. 111 */ 112 private static final int SELECTOR_ADJUSTMENT_DURATION_MILLIS = 800; 113 114 /** 115 * The duration of scrolling to the next/previous value while snapping to 116 * a given position. 117 */ 118 private static final int SNAP_SCROLL_DURATION = 300; 119 120 /** 121 * The strength of fading in the top and bottom while drawing the selector. 122 */ 123 private static final float TOP_AND_BOTTOM_FADING_EDGE_STRENGTH = 0.9f; 124 125 /** 126 * The default unscaled height of the selection divider. 127 */ 128 private static final int UNSCALED_DEFAULT_SELECTION_DIVIDER_HEIGHT = 2; 129 130 /** 131 * The default unscaled distance between the selection dividers. 132 */ 133 private static final int UNSCALED_DEFAULT_SELECTION_DIVIDERS_DISTANCE = 48; 134 135 /** 136 * The default unscaled minimal distance for a swipe to be considered a fling. 137 */ 138 private static final int UNSCALED_DEFAULT_MIN_FLING_DISTANCE = 150; 139 140 /** 141 * Coefficient for adjusting touch scroll distance. 142 */ 143 private static final float TOUCH_SCROLL_DECELERATION_COEFFICIENT = 2.0f; 144 145 /** 146 * The resource id for the default layout. 147 */ 148 private static final int DEFAULT_LAYOUT_RESOURCE_ID = R.layout.number_picker; 149 150 /** 151 * The numbers accepted by the input text's {@link Filter} 152 */ 153 private static final char[] DIGIT_CHARACTERS = new char[] { 154 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' 155 }; 156 157 /** 158 * Constant for unspecified size. 159 */ 160 private static final int SIZE_UNSPECIFIED = -1; 161 162 /** 163 * Use a custom NumberPicker formatting callback to use two-digit minutes 164 * strings like "01". Keeping a static formatter etc. is the most efficient 165 * way to do this; it avoids creating temporary objects on every call to 166 * format(). 167 * 168 * @hide 169 */ 170 public static final NumberPicker.Formatter TWO_DIGIT_FORMATTER = new NumberPicker.Formatter() { 171 final StringBuilder mBuilder = new StringBuilder(); 172 173 final java.util.Formatter mFmt = new java.util.Formatter(mBuilder, java.util.Locale.US); 174 175 final Object[] mArgs = new Object[1]; 176 177 public String format(int value) { 178 mArgs[0] = value; 179 mBuilder.delete(0, mBuilder.length()); 180 mFmt.format("%02d", mArgs); 181 return mFmt.toString(); 182 } 183 }; 184 185 /** 186 * The increment button. 187 */ 188 private final ImageButton mIncrementButton; 189 190 /** 191 * The decrement button. 192 */ 193 private final ImageButton mDecrementButton; 194 195 /** 196 * The text for showing the current value. 197 */ 198 private final EditText mInputText; 199 200 /** 201 * The distance between the two selection dividers. 202 */ 203 private final int mSelectionDividersDistance; 204 205 /** 206 * The min height of this widget. 207 */ 208 private final int mMinHeight; 209 210 /** 211 * The max height of this widget. 212 */ 213 private final int mMaxHeight; 214 215 /** 216 * The max width of this widget. 217 */ 218 private final int mMinWidth; 219 220 /** 221 * The max width of this widget. 222 */ 223 private int mMaxWidth; 224 225 /** 226 * Flag whether to compute the max width. 227 */ 228 private final boolean mComputeMaxWidth; 229 230 /** 231 * The height of the text. 232 */ 233 private final int mTextSize; 234 235 /** 236 * The minimal distance for a swipe to be considered a fling. 237 */ 238 private final int mMinFlingDistance; 239 240 /** 241 * The height of the gap between text elements if the selector wheel. 242 */ 243 private int mSelectorTextGapHeight; 244 245 /** 246 * The values to be displayed instead the indices. 247 */ 248 private String[] mDisplayedValues; 249 250 /** 251 * Lower value of the range of numbers allowed for the NumberPicker 252 */ 253 private int mMinValue; 254 255 /** 256 * Upper value of the range of numbers allowed for the NumberPicker 257 */ 258 private int mMaxValue; 259 260 /** 261 * Current value of this NumberPicker 262 */ 263 private int mValue; 264 265 /** 266 * Listener to be notified upon current value change. 267 */ 268 private OnValueChangeListener mOnValueChangeListener; 269 270 /** 271 * Listener to be notified upon scroll state change. 272 */ 273 private OnScrollListener mOnScrollListener; 274 275 /** 276 * Formatter for for displaying the current value. 277 */ 278 private Formatter mFormatter; 279 280 /** 281 * The speed for updating the value form long press. 282 */ 283 private long mLongPressUpdateInterval = DEFAULT_LONG_PRESS_UPDATE_INTERVAL; 284 285 /** 286 * Cache for the string representation of selector indices. 287 */ 288 private final SparseArray<String> mSelectorIndexToStringCache = new SparseArray<String>(); 289 290 /** 291 * The selector indices whose value are show by the selector. 292 */ 293 private final int[] mSelectorIndices = new int[SELECTOR_WHEEL_ITEM_COUNT]; 294 295 /** 296 * The {@link Paint} for drawing the selector. 297 */ 298 private final Paint mSelectorWheelPaint; 299 300 /** 301 * The height of a selector element (text + gap). 302 */ 303 private int mSelectorElementHeight; 304 305 /** 306 * The initial offset of the scroll selector. 307 */ 308 private int mInitialScrollOffset = Integer.MIN_VALUE; 309 310 /** 311 * The current offset of the scroll selector. 312 */ 313 private int mCurrentScrollOffset; 314 315 /** 316 * The {@link Scroller} responsible for flinging the selector. 317 */ 318 private final Scroller mFlingScroller; 319 320 /** 321 * The {@link Scroller} responsible for adjusting the selector. 322 */ 323 private final Scroller mAdjustScroller; 324 325 /** 326 * The previous Y coordinate while scrolling the selector. 327 */ 328 private int mPreviousScrollerY; 329 330 /** 331 * Handle to the reusable command for setting the input text selection. 332 */ 333 private SetSelectionCommand mSetSelectionCommand; 334 335 /** 336 * Handle to the reusable command for changing the current value from long 337 * press by one. 338 */ 339 private ChangeCurrentByOneFromLongPressCommand mChangeCurrentByOneFromLongPressCommand; 340 341 /** 342 * Command for beginning an edit of the current value via IME on long press. 343 */ 344 private BeginSoftInputOnLongPressCommand mBeginSoftInputOnLongPressCommand; 345 346 /** 347 * The Y position of the last down event. 348 */ 349 private float mLastDownEventY; 350 351 /** 352 * The time of the last down event. 353 */ 354 private long mLastDownEventTime; 355 356 /** 357 * The Y position of the last down or move event. 358 */ 359 private float mLastDownOrMoveEventY; 360 361 /** 362 * Determines speed during touch scrolling. 363 */ 364 private VelocityTracker mVelocityTracker; 365 366 /** 367 * @see ViewConfiguration#getScaledTouchSlop() 368 */ 369 private int mTouchSlop; 370 371 /** 372 * @see ViewConfiguration#getScaledMinimumFlingVelocity() 373 */ 374 private int mMinimumFlingVelocity; 375 376 /** 377 * @see ViewConfiguration#getScaledMaximumFlingVelocity() 378 */ 379 private int mMaximumFlingVelocity; 380 381 /** 382 * Flag whether the selector should wrap around. 383 */ 384 private boolean mWrapSelectorWheel; 385 386 /** 387 * The back ground color used to optimize scroller fading. 388 */ 389 private final int mSolidColor; 390 391 /** 392 * Flag whether this widget has a selector wheel. 393 */ 394 private final boolean mHasSelectorWheel; 395 396 /** 397 * Divider for showing item to be selected while scrolling 398 */ 399 private final Drawable mSelectionDivider; 400 401 /** 402 * The height of the selection divider. 403 */ 404 private final int mSelectionDividerHeight; 405 406 /** 407 * The current scroll state of the number picker. 408 */ 409 private int mScrollState = OnScrollListener.SCROLL_STATE_IDLE; 410 411 /** 412 * Flag whether to ignore move events - we ignore such when we show in IME 413 * to prevent the content from scrolling. 414 */ 415 private boolean mIngonreMoveEvents; 416 417 /** 418 * Flag whether to show soft input on tap. 419 */ 420 private boolean mShowSoftInputOnTap; 421 422 /** 423 * The top of the top selection divider. 424 */ 425 private int mTopSelectionDividerTop; 426 427 /** 428 * The bottom of the bottom selection divider. 429 */ 430 private int mBottomSelectionDividerBottom; 431 432 /** 433 * The virtual id of the last hovered child. 434 */ 435 private int mLastHoveredChildVirtualViewId; 436 437 /** 438 * Provider to report to clients the semantic structure of this widget. 439 */ 440 private AccessibilityNodeProviderImpl mAccessibilityNodeProvider; 441 442 /** 443 * Interface to listen for changes of the current value. 444 */ 445 public interface OnValueChangeListener { 446 447 /** 448 * Called upon a change of the current value. 449 * 450 * @param picker The NumberPicker associated with this listener. 451 * @param oldVal The previous value. 452 * @param newVal The new value. 453 */ 454 void onValueChange(NumberPicker picker, int oldVal, int newVal); 455 } 456 457 /** 458 * Interface to listen for the picker scroll state. 459 */ 460 public interface OnScrollListener { 461 462 /** 463 * The view is not scrolling. 464 */ 465 public static int SCROLL_STATE_IDLE = 0; 466 467 /** 468 * The user is scrolling using touch, and his finger is still on the screen. 469 */ 470 public static int SCROLL_STATE_TOUCH_SCROLL = 1; 471 472 /** 473 * The user had previously been scrolling using touch and performed a fling. 474 */ 475 public static int SCROLL_STATE_FLING = 2; 476 477 /** 478 * Callback invoked while the number picker scroll state has changed. 479 * 480 * @param view The view whose scroll state is being reported. 481 * @param scrollState The current scroll state. One of 482 * {@link #SCROLL_STATE_IDLE}, 483 * {@link #SCROLL_STATE_TOUCH_SCROLL} or 484 * {@link #SCROLL_STATE_IDLE}. 485 */ 486 public void onScrollStateChange(NumberPicker view, int scrollState); 487 } 488 489 /** 490 * Interface used to format current value into a string for presentation. 491 */ 492 public interface Formatter { 493 494 /** 495 * Formats a string representation of the current value. 496 * 497 * @param value The currently selected value. 498 * @return A formatted string representation. 499 */ 500 public String format(int value); 501 } 502 503 /** 504 * Create a new number picker. 505 * 506 * @param context The application environment. 507 */ 508 public NumberPicker(Context context) { 509 this(context, null); 510 } 511 512 /** 513 * Create a new number picker. 514 * 515 * @param context The application environment. 516 * @param attrs A collection of attributes. 517 */ 518 public NumberPicker(Context context, AttributeSet attrs) { 519 this(context, attrs, R.attr.numberPickerStyle); 520 } 521 522 /** 523 * Create a new number picker 524 * 525 * @param context the application environment. 526 * @param attrs a collection of attributes. 527 * @param defStyle The default style to apply to this view. 528 */ 529 public NumberPicker(Context context, AttributeSet attrs, int defStyle) { 530 super(context, attrs, defStyle); 531 532 // process style attributes 533 TypedArray attributesArray = context.obtainStyledAttributes( 534 attrs, R.styleable.NumberPicker, defStyle, 0); 535 final int layoutResId = attributesArray.getResourceId( 536 R.styleable.NumberPicker_internalLayout, DEFAULT_LAYOUT_RESOURCE_ID); 537 538 mHasSelectorWheel = (layoutResId != DEFAULT_LAYOUT_RESOURCE_ID); 539 540 mSolidColor = attributesArray.getColor(R.styleable.NumberPicker_solidColor, 0); 541 542 mSelectionDivider = attributesArray.getDrawable(R.styleable.NumberPicker_selectionDivider); 543 544 final int defSelectionDividerHeight = (int) TypedValue.applyDimension( 545 TypedValue.COMPLEX_UNIT_DIP, UNSCALED_DEFAULT_SELECTION_DIVIDER_HEIGHT, 546 getResources().getDisplayMetrics()); 547 mSelectionDividerHeight = attributesArray.getDimensionPixelSize( 548 R.styleable.NumberPicker_selectionDividerHeight, defSelectionDividerHeight); 549 550 final int defSelectionDividerDistance = (int) TypedValue.applyDimension( 551 TypedValue.COMPLEX_UNIT_DIP, UNSCALED_DEFAULT_SELECTION_DIVIDERS_DISTANCE, 552 getResources().getDisplayMetrics()); 553 mSelectionDividersDistance = attributesArray.getDimensionPixelSize( 554 R.styleable.NumberPicker_selectionDividersDistance, defSelectionDividerDistance); 555 556 final int defMinFlingDistance = (int) TypedValue.applyDimension( 557 TypedValue.COMPLEX_UNIT_DIP, UNSCALED_DEFAULT_MIN_FLING_DISTANCE, 558 getResources().getDisplayMetrics()); 559 mMinFlingDistance = attributesArray.getDimensionPixelSize( 560 R.styleable.NumberPicker_minFlingDistance, defMinFlingDistance); 561 562 mMinHeight = attributesArray.getDimensionPixelSize( 563 R.styleable.NumberPicker_internalMinHeight, SIZE_UNSPECIFIED); 564 565 mMaxHeight = attributesArray.getDimensionPixelSize( 566 R.styleable.NumberPicker_internalMaxHeight, SIZE_UNSPECIFIED); 567 if (mMinHeight != SIZE_UNSPECIFIED && mMaxHeight != SIZE_UNSPECIFIED 568 && mMinHeight > mMaxHeight) { 569 throw new IllegalArgumentException("minHeight > maxHeight"); 570 } 571 572 mMinWidth = attributesArray.getDimensionPixelSize( 573 R.styleable.NumberPicker_internalMinWidth, SIZE_UNSPECIFIED); 574 575 mMaxWidth = attributesArray.getDimensionPixelSize( 576 R.styleable.NumberPicker_internalMaxWidth, SIZE_UNSPECIFIED); 577 if (mMinWidth != SIZE_UNSPECIFIED && mMaxWidth != SIZE_UNSPECIFIED 578 && mMinWidth > mMaxWidth) { 579 throw new IllegalArgumentException("minWidth > maxWidth"); 580 } 581 582 mComputeMaxWidth = (mMaxWidth == Integer.MAX_VALUE); 583 584 attributesArray.recycle(); 585 586 // By default Linearlayout that we extend is not drawn. This is 587 // its draw() method is not called but dispatchDraw() is called 588 // directly (see ViewGroup.drawChild()). However, this class uses 589 // the fading edge effect implemented by View and we need our 590 // draw() method to be called. Therefore, we declare we will draw. 591 setWillNotDraw(!mHasSelectorWheel); 592 593 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 594 Context.LAYOUT_INFLATER_SERVICE); 595 inflater.inflate(layoutResId, this, true); 596 597 OnClickListener onClickListener = new OnClickListener() { 598 public void onClick(View v) { 599 hideSoftInput(); 600 mInputText.clearFocus(); 601 if (v.getId() == R.id.increment) { 602 changeValueByOne(true); 603 } else { 604 changeValueByOne(false); 605 } 606 } 607 }; 608 609 OnLongClickListener onLongClickListener = new OnLongClickListener() { 610 public boolean onLongClick(View v) { 611 hideSoftInput(); 612 mInputText.clearFocus(); 613 if (v.getId() == R.id.increment) { 614 postChangeCurrentByOneFromLongPress(true, 0); 615 } else { 616 postChangeCurrentByOneFromLongPress(false, 0); 617 } 618 return true; 619 } 620 }; 621 622 // increment button 623 if (!mHasSelectorWheel) { 624 mIncrementButton = (ImageButton) findViewById(R.id.increment); 625 mIncrementButton.setOnClickListener(onClickListener); 626 mIncrementButton.setOnLongClickListener(onLongClickListener); 627 } else { 628 mIncrementButton = null; 629 } 630 631 // decrement button 632 if (!mHasSelectorWheel) { 633 mDecrementButton = (ImageButton) findViewById(R.id.decrement); 634 mDecrementButton.setOnClickListener(onClickListener); 635 mDecrementButton.setOnLongClickListener(onLongClickListener); 636 } else { 637 mDecrementButton = null; 638 } 639 640 // input text 641 mInputText = (EditText) findViewById(R.id.numberpicker_input); 642 mInputText.setOnFocusChangeListener(new OnFocusChangeListener() { 643 public void onFocusChange(View v, boolean hasFocus) { 644 if (hasFocus) { 645 mInputText.selectAll(); 646 } else { 647 mInputText.setSelection(0, 0); 648 validateInputTextView(v); 649 } 650 } 651 }); 652 mInputText.setFilters(new InputFilter[] { 653 new InputTextFilter() 654 }); 655 656 mInputText.setRawInputType(InputType.TYPE_CLASS_NUMBER); 657 mInputText.setImeOptions(EditorInfo.IME_ACTION_DONE); 658 659 // initialize constants 660 ViewConfiguration configuration = ViewConfiguration.get(context); 661 mTouchSlop = configuration.getScaledTouchSlop(); 662 mMinimumFlingVelocity = configuration.getScaledMinimumFlingVelocity(); 663 mMaximumFlingVelocity = configuration.getScaledMaximumFlingVelocity() 664 / SELECTOR_MAX_FLING_VELOCITY_ADJUSTMENT; 665 mTextSize = (int) mInputText.getTextSize(); 666 667 // create the selector wheel paint 668 Paint paint = new Paint(); 669 paint.setAntiAlias(true); 670 paint.setTextAlign(Align.CENTER); 671 paint.setTextSize(mTextSize); 672 paint.setTypeface(mInputText.getTypeface()); 673 ColorStateList colors = mInputText.getTextColors(); 674 int color = colors.getColorForState(ENABLED_STATE_SET, Color.WHITE); 675 paint.setColor(color); 676 mSelectorWheelPaint = paint; 677 678 // create the fling and adjust scrollers 679 mFlingScroller = new Scroller(getContext(), null, true); 680 mAdjustScroller = new Scroller(getContext(), new DecelerateInterpolator(2.5f)); 681 682 updateInputTextView(); 683 } 684 685 @Override 686 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 687 if (!mHasSelectorWheel) { 688 super.onLayout(changed, left, top, right, bottom); 689 return; 690 } 691 final int msrdWdth = getMeasuredWidth(); 692 final int msrdHght = getMeasuredHeight(); 693 694 // Input text centered horizontally. 695 final int inptTxtMsrdWdth = mInputText.getMeasuredWidth(); 696 final int inptTxtMsrdHght = mInputText.getMeasuredHeight(); 697 final int inptTxtLeft = (msrdWdth - inptTxtMsrdWdth) / 2; 698 final int inptTxtTop = (msrdHght - inptTxtMsrdHght) / 2; 699 final int inptTxtRight = inptTxtLeft + inptTxtMsrdWdth; 700 final int inptTxtBottom = inptTxtTop + inptTxtMsrdHght; 701 mInputText.layout(inptTxtLeft, inptTxtTop, inptTxtRight, inptTxtBottom); 702 703 if (changed) { 704 // need to do all this when we know our size 705 initializeSelectorWheel(); 706 initializeFadingEdges(); 707 mTopSelectionDividerTop = (getHeight() - mSelectionDividersDistance) / 2 708 - mSelectionDividerHeight; 709 mBottomSelectionDividerBottom = mTopSelectionDividerTop + 2 * mSelectionDividerHeight 710 + mSelectionDividersDistance; 711 } 712 } 713 714 @Override 715 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 716 if (!mHasSelectorWheel) { 717 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 718 return; 719 } 720 // Try greedily to fit the max width and height. 721 final int newWidthMeasureSpec = makeMeasureSpec(widthMeasureSpec, mMaxWidth); 722 final int newHeightMeasureSpec = makeMeasureSpec(heightMeasureSpec, mMaxHeight); 723 super.onMeasure(newWidthMeasureSpec, newHeightMeasureSpec); 724 // Flag if we are measured with width or height less than the respective min. 725 final int widthSize = resolveSizeAndStateRespectingMinSize(mMinWidth, getMeasuredWidth(), 726 widthMeasureSpec); 727 final int heightSize = resolveSizeAndStateRespectingMinSize(mMinHeight, getMeasuredHeight(), 728 heightMeasureSpec); 729 setMeasuredDimension(widthSize, heightSize); 730 } 731 732 /** 733 * Move to the final position of a scroller. Ensures to force finish the scroller 734 * and if it is not at its final position a scroll of the selector wheel is 735 * performed to fast forward to the final position. 736 * 737 * @param scroller The scroller to whose final position to get. 738 * @return True of the a move was performed, i.e. the scroller was not in final position. 739 */ 740 private boolean moveToFinalScrollerPosition(Scroller scroller) { 741 scroller.forceFinished(true); 742 int amountToScroll = scroller.getFinalY() - scroller.getCurrY(); 743 int futureScrollOffset = (mCurrentScrollOffset + amountToScroll) % mSelectorElementHeight; 744 int overshootAdjustment = mInitialScrollOffset - futureScrollOffset; 745 if (overshootAdjustment != 0) { 746 if (Math.abs(overshootAdjustment) > mSelectorElementHeight / 2) { 747 if (overshootAdjustment > 0) { 748 overshootAdjustment -= mSelectorElementHeight; 749 } else { 750 overshootAdjustment += mSelectorElementHeight; 751 } 752 } 753 amountToScroll += overshootAdjustment; 754 scrollBy(0, amountToScroll); 755 return true; 756 } 757 return false; 758 } 759 760 @Override 761 public boolean onInterceptTouchEvent(MotionEvent event) { 762 if (!mHasSelectorWheel || !isEnabled()) { 763 return false; 764 } 765 final int action = event.getActionMasked(); 766 switch (action) { 767 case MotionEvent.ACTION_DOWN: { 768 removeAllCallbacks(); 769 mInputText.setVisibility(View.INVISIBLE); 770 mLastDownOrMoveEventY = mLastDownEventY = event.getY(); 771 mLastDownEventTime = event.getEventTime(); 772 mIngonreMoveEvents = false; 773 mShowSoftInputOnTap = false; 774 if (!mFlingScroller.isFinished()) { 775 mFlingScroller.forceFinished(true); 776 mAdjustScroller.forceFinished(true); 777 onScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE); 778 } else if (!mAdjustScroller.isFinished()) { 779 mFlingScroller.forceFinished(true); 780 mAdjustScroller.forceFinished(true); 781 } else if (mLastDownEventY < mTopSelectionDividerTop) { 782 hideSoftInput(); 783 postChangeCurrentByOneFromLongPress( 784 false, ViewConfiguration.getLongPressTimeout()); 785 } else if (mLastDownEventY > mBottomSelectionDividerBottom) { 786 hideSoftInput(); 787 postChangeCurrentByOneFromLongPress( 788 true, ViewConfiguration.getLongPressTimeout()); 789 } else { 790 mShowSoftInputOnTap = true; 791 postBeginSoftInputOnLongPressCommand(); 792 } 793 return true; 794 } 795 } 796 return false; 797 } 798 799 @Override 800 public boolean onTouchEvent(MotionEvent event) { 801 if (!isEnabled() || !mHasSelectorWheel) { 802 return false; 803 } 804 if (mVelocityTracker == null) { 805 mVelocityTracker = VelocityTracker.obtain(); 806 } 807 mVelocityTracker.addMovement(event); 808 int action = event.getActionMasked(); 809 switch (action) { 810 case MotionEvent.ACTION_MOVE: { 811 if (mIngonreMoveEvents) { 812 break; 813 } 814 float currentMoveY = event.getY(); 815 if (mScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) { 816 int deltaDownY = (int) Math.abs(currentMoveY - mLastDownEventY); 817 if (deltaDownY > mTouchSlop) { 818 removeAllCallbacks(); 819 onScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL); 820 } 821 } else { 822 int deltaMoveY = (int) ((currentMoveY - mLastDownOrMoveEventY) 823 / TOUCH_SCROLL_DECELERATION_COEFFICIENT); 824 scrollBy(0, deltaMoveY); 825 invalidate(); 826 } 827 mLastDownOrMoveEventY = currentMoveY; 828 } break; 829 case MotionEvent.ACTION_UP: { 830 removeBeginSoftInputCommand(); 831 removeChangeCurrentByOneFromLongPress(); 832 VelocityTracker velocityTracker = mVelocityTracker; 833 velocityTracker.computeCurrentVelocity(1000, mMaximumFlingVelocity); 834 int initialVelocity = (int) velocityTracker.getYVelocity(); 835 if (Math.abs(initialVelocity) > mMinimumFlingVelocity) { 836 int deltaMove = (int) (event.getY() - mLastDownEventY); 837 int absDeltaMoveY = Math.abs(deltaMove); 838 if (absDeltaMoveY > mMinFlingDistance) { 839 fling(initialVelocity); 840 } else { 841 final int normalizedDeltaMove = 842 (int) (absDeltaMoveY / TOUCH_SCROLL_DECELERATION_COEFFICIENT); 843 if (normalizedDeltaMove < mSelectorElementHeight) { 844 snapToNextValue(deltaMove < 0); 845 } else { 846 snapToClosestValue(); 847 } 848 } 849 onScrollStateChange(OnScrollListener.SCROLL_STATE_FLING); 850 } else { 851 int eventY = (int) event.getY(); 852 int deltaMoveY = (int) Math.abs(eventY - mLastDownEventY); 853 long deltaTime = event.getEventTime() - mLastDownEventTime; 854 if (deltaMoveY <= mTouchSlop && deltaTime < ViewConfiguration.getTapTimeout()) { 855 if (mShowSoftInputOnTap) { 856 mShowSoftInputOnTap = false; 857 showSoftInput(); 858 } else { 859 int selectorIndexOffset = (eventY / mSelectorElementHeight) 860 - SELECTOR_MIDDLE_ITEM_INDEX; 861 if (selectorIndexOffset > 0) { 862 changeValueByOne(true); 863 } else if (selectorIndexOffset < 0) { 864 changeValueByOne(false); 865 } 866 } 867 } else { 868 ensureScrollWheelAdjusted(); 869 } 870 onScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE); 871 } 872 mVelocityTracker.recycle(); 873 mVelocityTracker = null; 874 } break; 875 } 876 return true; 877 } 878 879 @Override 880 public boolean dispatchTouchEvent(MotionEvent event) { 881 final int action = event.getActionMasked(); 882 switch (action) { 883 case MotionEvent.ACTION_CANCEL: 884 case MotionEvent.ACTION_UP: 885 removeAllCallbacks(); 886 break; 887 } 888 return super.dispatchTouchEvent(event); 889 } 890 891 @Override 892 public boolean dispatchKeyEvent(KeyEvent event) { 893 final int keyCode = event.getKeyCode(); 894 switch (keyCode) { 895 case KeyEvent.KEYCODE_DPAD_CENTER: 896 case KeyEvent.KEYCODE_ENTER: 897 removeAllCallbacks(); 898 break; 899 } 900 return super.dispatchKeyEvent(event); 901 } 902 903 @Override 904 public boolean dispatchTrackballEvent(MotionEvent event) { 905 final int action = event.getActionMasked(); 906 switch (action) { 907 case MotionEvent.ACTION_CANCEL: 908 case MotionEvent.ACTION_UP: 909 removeAllCallbacks(); 910 break; 911 } 912 return super.dispatchTrackballEvent(event); 913 } 914 915 @Override 916 protected boolean dispatchHoverEvent(MotionEvent event) { 917 if (!mHasSelectorWheel) { 918 return super.dispatchHoverEvent(event); 919 } 920 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 921 final int eventY = (int) event.getY(); 922 final int hoveredVirtualViewId; 923 if (eventY < mTopSelectionDividerTop) { 924 hoveredVirtualViewId = AccessibilityNodeProviderImpl.VIRTUAL_VIEW_ID_DECREMENT; 925 } else if (eventY > mBottomSelectionDividerBottom) { 926 hoveredVirtualViewId = AccessibilityNodeProviderImpl.VIRTUAL_VIEW_ID_INCREMENT; 927 } else { 928 hoveredVirtualViewId = AccessibilityNodeProviderImpl.VIRTUAL_VIEW_ID_INPUT; 929 } 930 final int action = event.getActionMasked(); 931 AccessibilityNodeProviderImpl provider = 932 (AccessibilityNodeProviderImpl) getAccessibilityNodeProvider(); 933 switch (action) { 934 case MotionEvent.ACTION_HOVER_ENTER: { 935 provider.sendAccessibilityEventForVirtualView(hoveredVirtualViewId, 936 AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 937 mLastHoveredChildVirtualViewId = hoveredVirtualViewId; 938 } break; 939 case MotionEvent.ACTION_HOVER_MOVE: { 940 if (mLastHoveredChildVirtualViewId != hoveredVirtualViewId 941 && mLastHoveredChildVirtualViewId != View.NO_ID) { 942 provider.sendAccessibilityEventForVirtualView( 943 mLastHoveredChildVirtualViewId, 944 AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 945 provider.sendAccessibilityEventForVirtualView(hoveredVirtualViewId, 946 AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 947 mLastHoveredChildVirtualViewId = hoveredVirtualViewId; 948 } 949 } break; 950 case MotionEvent.ACTION_HOVER_EXIT: { 951 provider.sendAccessibilityEventForVirtualView(hoveredVirtualViewId, 952 AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 953 mLastHoveredChildVirtualViewId = View.NO_ID; 954 } break; 955 } 956 } 957 return false; 958 } 959 960 @Override 961 public void computeScroll() { 962 Scroller scroller = mFlingScroller; 963 if (scroller.isFinished()) { 964 scroller = mAdjustScroller; 965 if (scroller.isFinished()) { 966 return; 967 } 968 } 969 scroller.computeScrollOffset(); 970 int currentScrollerY = scroller.getCurrY(); 971 if (mPreviousScrollerY == 0) { 972 mPreviousScrollerY = scroller.getStartY(); 973 } 974 scrollBy(0, currentScrollerY - mPreviousScrollerY); 975 mPreviousScrollerY = currentScrollerY; 976 if (scroller.isFinished()) { 977 onScrollerFinished(scroller); 978 } else { 979 invalidate(); 980 } 981 } 982 983 @Override 984 public void setEnabled(boolean enabled) { 985 super.setEnabled(enabled); 986 if (!mHasSelectorWheel) { 987 mIncrementButton.setEnabled(enabled); 988 } 989 if (!mHasSelectorWheel) { 990 mDecrementButton.setEnabled(enabled); 991 } 992 mInputText.setEnabled(enabled); 993 } 994 995 @Override 996 public void scrollBy(int x, int y) { 997 int[] selectorIndices = mSelectorIndices; 998 if (!mWrapSelectorWheel && y > 0 999 && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] <= mMinValue) { 1000 mCurrentScrollOffset = mInitialScrollOffset; 1001 return; 1002 } 1003 if (!mWrapSelectorWheel && y < 0 1004 && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] >= mMaxValue) { 1005 mCurrentScrollOffset = mInitialScrollOffset; 1006 return; 1007 } 1008 mCurrentScrollOffset += y; 1009 while (mCurrentScrollOffset - mInitialScrollOffset > mSelectorTextGapHeight) { 1010 mCurrentScrollOffset -= mSelectorElementHeight; 1011 decrementSelectorIndices(selectorIndices); 1012 setValueInternal(selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX], true); 1013 if (!mWrapSelectorWheel && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] <= mMinValue) { 1014 mCurrentScrollOffset = mInitialScrollOffset; 1015 } 1016 } 1017 while (mCurrentScrollOffset - mInitialScrollOffset < -mSelectorTextGapHeight) { 1018 mCurrentScrollOffset += mSelectorElementHeight; 1019 incrementSelectorIndices(selectorIndices); 1020 setValueInternal(selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX], true); 1021 if (!mWrapSelectorWheel && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] >= mMaxValue) { 1022 mCurrentScrollOffset = mInitialScrollOffset; 1023 } 1024 } 1025 } 1026 1027 @Override 1028 public int getSolidColor() { 1029 return mSolidColor; 1030 } 1031 1032 /** 1033 * Sets the listener to be notified on change of the current value. 1034 * 1035 * @param onValueChangedListener The listener. 1036 */ 1037 public void setOnValueChangedListener(OnValueChangeListener onValueChangedListener) { 1038 mOnValueChangeListener = onValueChangedListener; 1039 } 1040 1041 /** 1042 * Set listener to be notified for scroll state changes. 1043 * 1044 * @param onScrollListener The listener. 1045 */ 1046 public void setOnScrollListener(OnScrollListener onScrollListener) { 1047 mOnScrollListener = onScrollListener; 1048 } 1049 1050 /** 1051 * Set the formatter to be used for formatting the current value. 1052 * <p> 1053 * Note: If you have provided alternative values for the values this 1054 * formatter is never invoked. 1055 * </p> 1056 * 1057 * @param formatter The formatter object. If formatter is <code>null</code>, 1058 * {@link String#valueOf(int)} will be used. 1059 *@see #setDisplayedValues(String[]) 1060 */ 1061 public void setFormatter(Formatter formatter) { 1062 if (formatter == mFormatter) { 1063 return; 1064 } 1065 mFormatter = formatter; 1066 initializeSelectorWheelIndices(); 1067 updateInputTextView(); 1068 } 1069 1070 /** 1071 * Set the current value for the number picker. 1072 * <p> 1073 * If the argument is less than the {@link NumberPicker#getMinValue()} and 1074 * {@link NumberPicker#getWrapSelectorWheel()} is <code>false</code> the 1075 * current value is set to the {@link NumberPicker#getMinValue()} value. 1076 * </p> 1077 * <p> 1078 * If the argument is less than the {@link NumberPicker#getMinValue()} and 1079 * {@link NumberPicker#getWrapSelectorWheel()} is <code>true</code> the 1080 * current value is set to the {@link NumberPicker#getMaxValue()} value. 1081 * </p> 1082 * <p> 1083 * If the argument is less than the {@link NumberPicker#getMaxValue()} and 1084 * {@link NumberPicker#getWrapSelectorWheel()} is <code>false</code> the 1085 * current value is set to the {@link NumberPicker#getMaxValue()} value. 1086 * </p> 1087 * <p> 1088 * If the argument is less than the {@link NumberPicker#getMaxValue()} and 1089 * {@link NumberPicker#getWrapSelectorWheel()} is <code>true</code> the 1090 * current value is set to the {@link NumberPicker#getMinValue()} value. 1091 * </p> 1092 * 1093 * @param value The current value. 1094 * @see #setWrapSelectorWheel(boolean) 1095 * @see #setMinValue(int) 1096 * @see #setMaxValue(int) 1097 */ 1098 public void setValue(int value) { 1099 if (mValue == value) { 1100 return; 1101 } 1102 setValueInternal(value, false); 1103 initializeSelectorWheelIndices(); 1104 invalidate(); 1105 } 1106 1107 /** 1108 * Shows the soft input for its input text. 1109 */ 1110 private void showSoftInput() { 1111 InputMethodManager inputMethodManager = InputMethodManager.peekInstance(); 1112 if (inputMethodManager != null) { 1113 if (mHasSelectorWheel) { 1114 mInputText.setVisibility(View.VISIBLE); 1115 } 1116 mInputText.requestFocus(); 1117 inputMethodManager.showSoftInput(mInputText, 0); 1118 } 1119 } 1120 1121 /** 1122 * Hides the soft input if it is active for the input text. 1123 */ 1124 private void hideSoftInput() { 1125 InputMethodManager inputMethodManager = InputMethodManager.peekInstance(); 1126 if (inputMethodManager != null && inputMethodManager.isActive(mInputText)) { 1127 inputMethodManager.hideSoftInputFromWindow(getWindowToken(), 0); 1128 if (mHasSelectorWheel) { 1129 mInputText.setVisibility(View.INVISIBLE); 1130 } 1131 } 1132 } 1133 1134 /** 1135 * Computes the max width if no such specified as an attribute. 1136 */ 1137 private void tryComputeMaxWidth() { 1138 if (!mComputeMaxWidth) { 1139 return; 1140 } 1141 int maxTextWidth = 0; 1142 if (mDisplayedValues == null) { 1143 float maxDigitWidth = 0; 1144 for (int i = 0; i <= 9; i++) { 1145 final float digitWidth = mSelectorWheelPaint.measureText(String.valueOf(i)); 1146 if (digitWidth > maxDigitWidth) { 1147 maxDigitWidth = digitWidth; 1148 } 1149 } 1150 int numberOfDigits = 0; 1151 int current = mMaxValue; 1152 while (current > 0) { 1153 numberOfDigits++; 1154 current = current / 10; 1155 } 1156 maxTextWidth = (int) (numberOfDigits * maxDigitWidth); 1157 } else { 1158 final int valueCount = mDisplayedValues.length; 1159 for (int i = 0; i < valueCount; i++) { 1160 final float textWidth = mSelectorWheelPaint.measureText(mDisplayedValues[i]); 1161 if (textWidth > maxTextWidth) { 1162 maxTextWidth = (int) textWidth; 1163 } 1164 } 1165 } 1166 maxTextWidth += mInputText.getPaddingLeft() + mInputText.getPaddingRight(); 1167 if (mMaxWidth != maxTextWidth) { 1168 if (maxTextWidth > mMinWidth) { 1169 mMaxWidth = maxTextWidth; 1170 } else { 1171 mMaxWidth = mMinWidth; 1172 } 1173 invalidate(); 1174 } 1175 } 1176 1177 /** 1178 * Gets whether the selector wheel wraps when reaching the min/max value. 1179 * 1180 * @return True if the selector wheel wraps. 1181 * 1182 * @see #getMinValue() 1183 * @see #getMaxValue() 1184 */ 1185 public boolean getWrapSelectorWheel() { 1186 return mWrapSelectorWheel; 1187 } 1188 1189 /** 1190 * Sets whether the selector wheel shown during flinging/scrolling should 1191 * wrap around the {@link NumberPicker#getMinValue()} and 1192 * {@link NumberPicker#getMaxValue()} values. 1193 * <p> 1194 * By default if the range (max - min) is more than the number of items shown 1195 * on the selector wheel the selector wheel wrapping is enabled. 1196 * </p> 1197 * <p> 1198 * <strong>Note:</strong> If the number of items, i.e. the range ( 1199 * {@link #getMaxValue()} - {@link #getMinValue()}) is less than 1200 * the number of items shown on the selector wheel, the selector wheel will 1201 * not wrap. Hence, in such a case calling this method is a NOP. 1202 * </p> 1203 * 1204 * @param wrapSelectorWheel Whether to wrap. 1205 */ 1206 public void setWrapSelectorWheel(boolean wrapSelectorWheel) { 1207 final boolean wrappingAllowed = (mMaxValue - mMinValue) >= mSelectorIndices.length; 1208 if ((!wrapSelectorWheel || wrappingAllowed) && wrapSelectorWheel != mWrapSelectorWheel) { 1209 mWrapSelectorWheel = wrapSelectorWheel; 1210 } 1211 } 1212 1213 /** 1214 * Sets the speed at which the numbers be incremented and decremented when 1215 * the up and down buttons are long pressed respectively. 1216 * <p> 1217 * The default value is 300 ms. 1218 * </p> 1219 * 1220 * @param intervalMillis The speed (in milliseconds) at which the numbers 1221 * will be incremented and decremented. 1222 */ 1223 public void setOnLongPressUpdateInterval(long intervalMillis) { 1224 mLongPressUpdateInterval = intervalMillis; 1225 } 1226 1227 /** 1228 * Returns the value of the picker. 1229 * 1230 * @return The value. 1231 */ 1232 public int getValue() { 1233 return mValue; 1234 } 1235 1236 /** 1237 * Returns the min value of the picker. 1238 * 1239 * @return The min value 1240 */ 1241 public int getMinValue() { 1242 return mMinValue; 1243 } 1244 1245 /** 1246 * Sets the min value of the picker. 1247 * 1248 * @param minValue The min value. 1249 */ 1250 public void setMinValue(int minValue) { 1251 if (mMinValue == minValue) { 1252 return; 1253 } 1254 if (minValue < 0) { 1255 throw new IllegalArgumentException("minValue must be >= 0"); 1256 } 1257 mMinValue = minValue; 1258 if (mMinValue > mValue) { 1259 mValue = mMinValue; 1260 } 1261 boolean wrapSelectorWheel = mMaxValue - mMinValue > mSelectorIndices.length; 1262 setWrapSelectorWheel(wrapSelectorWheel); 1263 initializeSelectorWheelIndices(); 1264 updateInputTextView(); 1265 tryComputeMaxWidth(); 1266 invalidate(); 1267 } 1268 1269 /** 1270 * Returns the max value of the picker. 1271 * 1272 * @return The max value. 1273 */ 1274 public int getMaxValue() { 1275 return mMaxValue; 1276 } 1277 1278 /** 1279 * Sets the max value of the picker. 1280 * 1281 * @param maxValue The max value. 1282 */ 1283 public void setMaxValue(int maxValue) { 1284 if (mMaxValue == maxValue) { 1285 return; 1286 } 1287 if (maxValue < 0) { 1288 throw new IllegalArgumentException("maxValue must be >= 0"); 1289 } 1290 mMaxValue = maxValue; 1291 if (mMaxValue < mValue) { 1292 mValue = mMaxValue; 1293 } 1294 boolean wrapSelectorWheel = mMaxValue - mMinValue > mSelectorIndices.length; 1295 setWrapSelectorWheel(wrapSelectorWheel); 1296 initializeSelectorWheelIndices(); 1297 updateInputTextView(); 1298 tryComputeMaxWidth(); 1299 invalidate(); 1300 } 1301 1302 /** 1303 * Gets the values to be displayed instead of string values. 1304 * 1305 * @return The displayed values. 1306 */ 1307 public String[] getDisplayedValues() { 1308 return mDisplayedValues; 1309 } 1310 1311 /** 1312 * Sets the values to be displayed. 1313 * 1314 * @param displayedValues The displayed values. 1315 */ 1316 public void setDisplayedValues(String[] displayedValues) { 1317 if (mDisplayedValues == displayedValues) { 1318 return; 1319 } 1320 mDisplayedValues = displayedValues; 1321 if (mDisplayedValues != null) { 1322 // Allow text entry rather than strictly numeric entry. 1323 mInputText.setRawInputType(InputType.TYPE_CLASS_TEXT 1324 | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS); 1325 } else { 1326 mInputText.setRawInputType(InputType.TYPE_CLASS_NUMBER); 1327 } 1328 updateInputTextView(); 1329 initializeSelectorWheelIndices(); 1330 tryComputeMaxWidth(); 1331 } 1332 1333 @Override 1334 protected float getTopFadingEdgeStrength() { 1335 return TOP_AND_BOTTOM_FADING_EDGE_STRENGTH; 1336 } 1337 1338 @Override 1339 protected float getBottomFadingEdgeStrength() { 1340 return TOP_AND_BOTTOM_FADING_EDGE_STRENGTH; 1341 } 1342 1343 @Override 1344 protected void onDetachedFromWindow() { 1345 removeAllCallbacks(); 1346 } 1347 1348 @Override 1349 protected void onDraw(Canvas canvas) { 1350 if (!mHasSelectorWheel) { 1351 super.onDraw(canvas); 1352 return; 1353 } 1354 float x = (mRight - mLeft) / 2; 1355 float y = mCurrentScrollOffset; 1356 1357 // draw the selector wheel 1358 int[] selectorIndices = mSelectorIndices; 1359 for (int i = 0; i < selectorIndices.length; i++) { 1360 int selectorIndex = selectorIndices[i]; 1361 String scrollSelectorValue = mSelectorIndexToStringCache.get(selectorIndex); 1362 // Do not draw the middle item if input is visible since the input 1363 // is shown only if the wheel is static and it covers the middle 1364 // item. Otherwise, if the user starts editing the text via the 1365 // IME he may see a dimmed version of the old value intermixed 1366 // with the new one. 1367 if (i != SELECTOR_MIDDLE_ITEM_INDEX || mInputText.getVisibility() != VISIBLE) { 1368 canvas.drawText(scrollSelectorValue, x, y, mSelectorWheelPaint); 1369 } 1370 y += mSelectorElementHeight; 1371 } 1372 1373 // draw the selection dividers 1374 if (mSelectionDivider != null) { 1375 // draw the top divider 1376 int topOfTopDivider = mTopSelectionDividerTop; 1377 int bottomOfTopDivider = topOfTopDivider + mSelectionDividerHeight; 1378 mSelectionDivider.setBounds(0, topOfTopDivider, mRight, bottomOfTopDivider); 1379 mSelectionDivider.draw(canvas); 1380 1381 // draw the bottom divider 1382 int bottomOfBottomDivider = mBottomSelectionDividerBottom; 1383 int topOfBottomDivider = bottomOfBottomDivider - mSelectionDividerHeight; 1384 mSelectionDivider.setBounds(0, topOfBottomDivider, mRight, bottomOfBottomDivider); 1385 mSelectionDivider.draw(canvas); 1386 } 1387 } 1388 1389 @Override 1390 public void sendAccessibilityEvent(int eventType) { 1391 // Do not send accessibility events - we want the user to 1392 // perceive this widget as several controls rather as a whole. 1393 } 1394 1395 @Override 1396 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 1397 super.onInitializeAccessibilityEvent(event); 1398 event.setClassName(NumberPicker.class.getName()); 1399 event.setScrollable(true); 1400 event.setScrollY((mMinValue + mValue) * mSelectorElementHeight); 1401 event.setMaxScrollY((mMaxValue - mMinValue) * mSelectorElementHeight); 1402 } 1403 1404 @Override 1405 public AccessibilityNodeProvider getAccessibilityNodeProvider() { 1406 if (!mHasSelectorWheel) { 1407 return super.getAccessibilityNodeProvider(); 1408 } 1409 if (mAccessibilityNodeProvider == null) { 1410 mAccessibilityNodeProvider = new AccessibilityNodeProviderImpl(); 1411 } 1412 return mAccessibilityNodeProvider; 1413 } 1414 1415 /** 1416 * Makes a measure spec that tries greedily to use the max value. 1417 * 1418 * @param measureSpec The measure spec. 1419 * @param maxSize The max value for the size. 1420 * @return A measure spec greedily imposing the max size. 1421 */ 1422 private int makeMeasureSpec(int measureSpec, int maxSize) { 1423 if (maxSize == SIZE_UNSPECIFIED) { 1424 return measureSpec; 1425 } 1426 final int size = MeasureSpec.getSize(measureSpec); 1427 final int mode = MeasureSpec.getMode(measureSpec); 1428 switch (mode) { 1429 case MeasureSpec.EXACTLY: 1430 return measureSpec; 1431 case MeasureSpec.AT_MOST: 1432 return MeasureSpec.makeMeasureSpec(Math.min(size, maxSize), MeasureSpec.EXACTLY); 1433 case MeasureSpec.UNSPECIFIED: 1434 return MeasureSpec.makeMeasureSpec(maxSize, MeasureSpec.EXACTLY); 1435 default: 1436 throw new IllegalArgumentException("Unknown measure mode: " + mode); 1437 } 1438 } 1439 1440 /** 1441 * Utility to reconcile a desired size and state, with constraints imposed 1442 * by a MeasureSpec. Tries to respect the min size, unless a different size 1443 * is imposed by the constraints. 1444 * 1445 * @param minSize The minimal desired size. 1446 * @param measuredSize The currently measured size. 1447 * @param measureSpec The current measure spec. 1448 * @return The resolved size and state. 1449 */ 1450 private int resolveSizeAndStateRespectingMinSize( 1451 int minSize, int measuredSize, int measureSpec) { 1452 if (minSize != SIZE_UNSPECIFIED) { 1453 final int desiredWidth = Math.max(minSize, measuredSize); 1454 return resolveSizeAndState(desiredWidth, measureSpec, 0); 1455 } else { 1456 return measuredSize; 1457 } 1458 } 1459 1460 /** 1461 * Resets the selector indices and clear the cached string representation of 1462 * these indices. 1463 */ 1464 private void initializeSelectorWheelIndices() { 1465 mSelectorIndexToStringCache.clear(); 1466 int[] selectorIdices = mSelectorIndices; 1467 int current = getValue(); 1468 for (int i = 0; i < mSelectorIndices.length; i++) { 1469 int selectorIndex = current + (i - SELECTOR_MIDDLE_ITEM_INDEX); 1470 if (mWrapSelectorWheel) { 1471 selectorIndex = getWrappedSelectorIndex(selectorIndex); 1472 } 1473 mSelectorIndices[i] = selectorIndex; 1474 ensureCachedScrollSelectorValue(mSelectorIndices[i]); 1475 } 1476 } 1477 1478 /** 1479 * Sets the current value of this NumberPicker. 1480 * 1481 * @param current The new value of the NumberPicker. 1482 * @param notifyChange Whether to notify if the current value changed. 1483 */ 1484 private void setValueInternal(int current, boolean notifyChange) { 1485 if (mValue == current) { 1486 return; 1487 } 1488 // Wrap around the values if we go past the start or end 1489 if (mWrapSelectorWheel) { 1490 current = getWrappedSelectorIndex(current); 1491 } else { 1492 current = Math.max(current, mMinValue); 1493 current = Math.min(current, mMaxValue); 1494 } 1495 int previous = mValue; 1496 mValue = current; 1497 updateInputTextView(); 1498 if (notifyChange) { 1499 notifyChange(previous, current); 1500 } 1501 } 1502 1503 /** 1504 * Changes the current value by one which is increment or 1505 * decrement based on the passes argument. 1506 * decrement the current value. 1507 * 1508 * @param increment True to increment, false to decrement. 1509 */ 1510 private void changeValueByOne(boolean increment) { 1511 if (mHasSelectorWheel) { 1512 mInputText.setVisibility(View.INVISIBLE); 1513 if (!moveToFinalScrollerPosition(mFlingScroller)) { 1514 moveToFinalScrollerPosition(mAdjustScroller); 1515 } 1516 mPreviousScrollerY = 0; 1517 if (increment) { 1518 mFlingScroller.startScroll(0, 0, 0, -mSelectorElementHeight, SNAP_SCROLL_DURATION); 1519 } else { 1520 mFlingScroller.startScroll(0, 0, 0, mSelectorElementHeight, SNAP_SCROLL_DURATION); 1521 } 1522 invalidate(); 1523 } else { 1524 if (increment) { 1525 setValueInternal(mValue + 1, true); 1526 } else { 1527 setValueInternal(mValue - 1, true); 1528 } 1529 } 1530 } 1531 1532 private void initializeSelectorWheel() { 1533 initializeSelectorWheelIndices(); 1534 int[] selectorIndices = mSelectorIndices; 1535 int totalTextHeight = selectorIndices.length * mTextSize; 1536 float totalTextGapHeight = (mBottom - mTop) - totalTextHeight; 1537 float textGapCount = selectorIndices.length; 1538 mSelectorTextGapHeight = (int) (totalTextGapHeight / textGapCount + 0.5f); 1539 mSelectorElementHeight = mTextSize + mSelectorTextGapHeight; 1540 // Ensure that the middle item is positioned the same as the text in 1541 // mInputText 1542 int editTextTextPosition = mInputText.getBaseline() + mInputText.getTop(); 1543 mInitialScrollOffset = editTextTextPosition 1544 - (mSelectorElementHeight * SELECTOR_MIDDLE_ITEM_INDEX); 1545 mCurrentScrollOffset = mInitialScrollOffset; 1546 updateInputTextView(); 1547 } 1548 1549 private void initializeFadingEdges() { 1550 setVerticalFadingEdgeEnabled(true); 1551 setFadingEdgeLength((mBottom - mTop - mTextSize) / 2); 1552 } 1553 1554 /** 1555 * Callback invoked upon completion of a given <code>scroller</code>. 1556 */ 1557 private void onScrollerFinished(Scroller scroller) { 1558 if (scroller == mFlingScroller) { 1559 if (!ensureScrollWheelAdjusted()) { 1560 updateInputTextView(); 1561 } 1562 onScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE); 1563 } else { 1564 if (mScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) { 1565 updateInputTextView(); 1566 } 1567 } 1568 } 1569 1570 /** 1571 * Handles transition to a given <code>scrollState</code> 1572 */ 1573 private void onScrollStateChange(int scrollState) { 1574 if (mScrollState == scrollState) { 1575 return; 1576 } 1577 mScrollState = scrollState; 1578 if (mOnScrollListener != null) { 1579 mOnScrollListener.onScrollStateChange(this, scrollState); 1580 } 1581 } 1582 1583 /** 1584 * Flings the selector with the given <code>velocityY</code>. 1585 */ 1586 private void fling(int velocityY) { 1587 mPreviousScrollerY = 0; 1588 1589 if (velocityY > 0) { 1590 mFlingScroller.fling(0, 0, 0, velocityY, 0, 0, 0, Integer.MAX_VALUE); 1591 } else { 1592 mFlingScroller.fling(0, Integer.MAX_VALUE, 0, velocityY, 0, 0, 0, Integer.MAX_VALUE); 1593 } 1594 1595 invalidate(); 1596 } 1597 1598 /** 1599 * @return The wrapped index <code>selectorIndex</code> value. 1600 */ 1601 private int getWrappedSelectorIndex(int selectorIndex) { 1602 if (selectorIndex > mMaxValue) { 1603 return mMinValue + (selectorIndex - mMaxValue) % (mMaxValue - mMinValue) - 1; 1604 } else if (selectorIndex < mMinValue) { 1605 return mMaxValue - (mMinValue - selectorIndex) % (mMaxValue - mMinValue) + 1; 1606 } 1607 return selectorIndex; 1608 } 1609 1610 /** 1611 * Increments the <code>selectorIndices</code> whose string representations 1612 * will be displayed in the selector. 1613 */ 1614 private void incrementSelectorIndices(int[] selectorIndices) { 1615 for (int i = 0; i < selectorIndices.length - 1; i++) { 1616 selectorIndices[i] = selectorIndices[i + 1]; 1617 } 1618 int nextScrollSelectorIndex = selectorIndices[selectorIndices.length - 2] + 1; 1619 if (mWrapSelectorWheel && nextScrollSelectorIndex > mMaxValue) { 1620 nextScrollSelectorIndex = mMinValue; 1621 } 1622 selectorIndices[selectorIndices.length - 1] = nextScrollSelectorIndex; 1623 ensureCachedScrollSelectorValue(nextScrollSelectorIndex); 1624 } 1625 1626 /** 1627 * Decrements the <code>selectorIndices</code> whose string representations 1628 * will be displayed in the selector. 1629 */ 1630 private void decrementSelectorIndices(int[] selectorIndices) { 1631 for (int i = selectorIndices.length - 1; i > 0; i--) { 1632 selectorIndices[i] = selectorIndices[i - 1]; 1633 } 1634 int nextScrollSelectorIndex = selectorIndices[1] - 1; 1635 if (mWrapSelectorWheel && nextScrollSelectorIndex < mMinValue) { 1636 nextScrollSelectorIndex = mMaxValue; 1637 } 1638 selectorIndices[0] = nextScrollSelectorIndex; 1639 ensureCachedScrollSelectorValue(nextScrollSelectorIndex); 1640 } 1641 1642 /** 1643 * Ensures we have a cached string representation of the given <code> 1644 * selectorIndex</code> to avoid multiple instantiations of the same string. 1645 */ 1646 private void ensureCachedScrollSelectorValue(int selectorIndex) { 1647 SparseArray<String> cache = mSelectorIndexToStringCache; 1648 String scrollSelectorValue = cache.get(selectorIndex); 1649 if (scrollSelectorValue != null) { 1650 return; 1651 } 1652 if (selectorIndex < mMinValue || selectorIndex > mMaxValue) { 1653 scrollSelectorValue = ""; 1654 } else { 1655 if (mDisplayedValues != null) { 1656 int displayedValueIndex = selectorIndex - mMinValue; 1657 scrollSelectorValue = mDisplayedValues[displayedValueIndex]; 1658 } else { 1659 scrollSelectorValue = formatNumber(selectorIndex); 1660 } 1661 } 1662 cache.put(selectorIndex, scrollSelectorValue); 1663 } 1664 1665 private String formatNumber(int value) { 1666 return (mFormatter != null) ? mFormatter.format(value) : String.valueOf(value); 1667 } 1668 1669 private void validateInputTextView(View v) { 1670 String str = String.valueOf(((TextView) v).getText()); 1671 if (TextUtils.isEmpty(str)) { 1672 // Restore to the old value as we don't allow empty values 1673 updateInputTextView(); 1674 } else { 1675 // Check the new value and ensure it's in range 1676 int current = getSelectedPos(str.toString()); 1677 setValueInternal(current, true); 1678 } 1679 } 1680 1681 /** 1682 * Updates the view of this NumberPicker. If displayValues were specified in 1683 * the string corresponding to the index specified by the current value will 1684 * be returned. Otherwise, the formatter specified in {@link #setFormatter} 1685 * will be used to format the number. 1686 * 1687 * @return Whether the text was updated. 1688 */ 1689 private boolean updateInputTextView() { 1690 /* 1691 * If we don't have displayed values then use the current number else 1692 * find the correct value in the displayed values for the current 1693 * number. 1694 */ 1695 String text = (mDisplayedValues == null) ? formatNumber(mValue) 1696 : mDisplayedValues[mValue - mMinValue]; 1697 if (!TextUtils.isEmpty(text) && !text.equals(mInputText.getText().toString())) { 1698 mInputText.setText(text); 1699 return true; 1700 } 1701 1702 return false; 1703 } 1704 1705 /** 1706 * Notifies the listener, if registered, of a change of the value of this 1707 * NumberPicker. 1708 */ 1709 private void notifyChange(int previous, int current) { 1710 if (mOnValueChangeListener != null) { 1711 mOnValueChangeListener.onValueChange(this, previous, mValue); 1712 } 1713 } 1714 1715 /** 1716 * Posts a command for changing the current value by one. 1717 * 1718 * @param increment Whether to increment or decrement the value. 1719 */ 1720 private void postChangeCurrentByOneFromLongPress(boolean increment, long delayMillis) { 1721 if (mChangeCurrentByOneFromLongPressCommand == null) { 1722 mChangeCurrentByOneFromLongPressCommand = new ChangeCurrentByOneFromLongPressCommand(); 1723 } else { 1724 removeCallbacks(mChangeCurrentByOneFromLongPressCommand); 1725 } 1726 mChangeCurrentByOneFromLongPressCommand.setStep(increment); 1727 postDelayed(mChangeCurrentByOneFromLongPressCommand, delayMillis); 1728 } 1729 1730 /** 1731 * Removes the command for changing the current value by one. 1732 */ 1733 private void removeChangeCurrentByOneFromLongPress() { 1734 if (mChangeCurrentByOneFromLongPressCommand != null) { 1735 removeCallbacks(mChangeCurrentByOneFromLongPressCommand); 1736 } 1737 } 1738 1739 /** 1740 * Posts a command for beginning an edit of the current value via IME on 1741 * long press. 1742 */ 1743 private void postBeginSoftInputOnLongPressCommand() { 1744 if (mBeginSoftInputOnLongPressCommand == null) { 1745 mBeginSoftInputOnLongPressCommand = new BeginSoftInputOnLongPressCommand(); 1746 } else { 1747 removeCallbacks(mBeginSoftInputOnLongPressCommand); 1748 } 1749 postDelayed(mBeginSoftInputOnLongPressCommand, ViewConfiguration.getLongPressTimeout()); 1750 } 1751 1752 /** 1753 * Removes the command for beginning an edit of the current value via IME. 1754 */ 1755 private void removeBeginSoftInputCommand() { 1756 if (mBeginSoftInputOnLongPressCommand != null) { 1757 removeCallbacks(mBeginSoftInputOnLongPressCommand); 1758 } 1759 } 1760 1761 /** 1762 * Removes all pending callback from the message queue. 1763 */ 1764 private void removeAllCallbacks() { 1765 if (mChangeCurrentByOneFromLongPressCommand != null) { 1766 removeCallbacks(mChangeCurrentByOneFromLongPressCommand); 1767 } 1768 if (mSetSelectionCommand != null) { 1769 removeCallbacks(mSetSelectionCommand); 1770 } 1771 if (mBeginSoftInputOnLongPressCommand != null) { 1772 removeCallbacks(mBeginSoftInputOnLongPressCommand); 1773 } 1774 } 1775 1776 /** 1777 * @return The selected index given its displayed <code>value</code>. 1778 */ 1779 private int getSelectedPos(String value) { 1780 if (mDisplayedValues == null) { 1781 try { 1782 return Integer.parseInt(value); 1783 } catch (NumberFormatException e) { 1784 // Ignore as if it's not a number we don't care 1785 } 1786 } else { 1787 for (int i = 0; i < mDisplayedValues.length; i++) { 1788 // Don't force the user to type in jan when ja will do 1789 value = value.toLowerCase(); 1790 if (mDisplayedValues[i].toLowerCase().startsWith(value)) { 1791 return mMinValue + i; 1792 } 1793 } 1794 1795 /* 1796 * The user might have typed in a number into the month field i.e. 1797 * 10 instead of OCT so support that too. 1798 */ 1799 try { 1800 return Integer.parseInt(value); 1801 } catch (NumberFormatException e) { 1802 1803 // Ignore as if it's not a number we don't care 1804 } 1805 } 1806 return mMinValue; 1807 } 1808 1809 /** 1810 * Posts an {@link SetSelectionCommand} from the given <code>selectionStart 1811 * </code> to <code>selectionEnd</code>. 1812 */ 1813 private void postSetSelectionCommand(int selectionStart, int selectionEnd) { 1814 if (mSetSelectionCommand == null) { 1815 mSetSelectionCommand = new SetSelectionCommand(); 1816 } else { 1817 removeCallbacks(mSetSelectionCommand); 1818 } 1819 mSetSelectionCommand.mSelectionStart = selectionStart; 1820 mSetSelectionCommand.mSelectionEnd = selectionEnd; 1821 post(mSetSelectionCommand); 1822 } 1823 1824 /** 1825 * Filter for accepting only valid indices or prefixes of the string 1826 * representation of valid indices. 1827 */ 1828 class InputTextFilter extends NumberKeyListener { 1829 1830 // XXX This doesn't allow for range limits when controlled by a 1831 // soft input method! 1832 public int getInputType() { 1833 return InputType.TYPE_CLASS_TEXT; 1834 } 1835 1836 @Override 1837 protected char[] getAcceptedChars() { 1838 return DIGIT_CHARACTERS; 1839 } 1840 1841 @Override 1842 public CharSequence filter( 1843 CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { 1844 if (mDisplayedValues == null) { 1845 CharSequence filtered = super.filter(source, start, end, dest, dstart, dend); 1846 if (filtered == null) { 1847 filtered = source.subSequence(start, end); 1848 } 1849 1850 String result = String.valueOf(dest.subSequence(0, dstart)) + filtered 1851 + dest.subSequence(dend, dest.length()); 1852 1853 if ("".equals(result)) { 1854 return result; 1855 } 1856 int val = getSelectedPos(result); 1857 1858 /* 1859 * Ensure the user can't type in a value greater than the max 1860 * allowed. We have to allow less than min as the user might 1861 * want to delete some numbers and then type a new number. 1862 */ 1863 if (val > mMaxValue) { 1864 return ""; 1865 } else { 1866 return filtered; 1867 } 1868 } else { 1869 CharSequence filtered = String.valueOf(source.subSequence(start, end)); 1870 if (TextUtils.isEmpty(filtered)) { 1871 return ""; 1872 } 1873 String result = String.valueOf(dest.subSequence(0, dstart)) + filtered 1874 + dest.subSequence(dend, dest.length()); 1875 String str = String.valueOf(result).toLowerCase(); 1876 for (String val : mDisplayedValues) { 1877 String valLowerCase = val.toLowerCase(); 1878 if (valLowerCase.startsWith(str)) { 1879 postSetSelectionCommand(result.length(), val.length()); 1880 return val.subSequence(dstart, val.length()); 1881 } 1882 } 1883 return ""; 1884 } 1885 } 1886 } 1887 1888 /** 1889 * Ensures that the scroll wheel is adjusted i.e. there is no offset and the 1890 * middle element is in the middle of the widget. 1891 * 1892 * @return Whether an adjustment has been made. 1893 */ 1894 private boolean ensureScrollWheelAdjusted() { 1895 // adjust to the closest value 1896 int deltaY = mInitialScrollOffset - mCurrentScrollOffset; 1897 if (deltaY != 0) { 1898 mPreviousScrollerY = 0; 1899 if (Math.abs(deltaY) > mSelectorElementHeight / 2) { 1900 deltaY += (deltaY > 0) ? -mSelectorElementHeight : mSelectorElementHeight; 1901 } 1902 mAdjustScroller.startScroll(0, 0, 0, deltaY, SELECTOR_ADJUSTMENT_DURATION_MILLIS); 1903 invalidate(); 1904 return true; 1905 } 1906 return false; 1907 } 1908 1909 private void snapToNextValue(boolean increment) { 1910 int deltaY = mCurrentScrollOffset - mInitialScrollOffset; 1911 int amountToScroll = 0; 1912 if (deltaY != 0) { 1913 mPreviousScrollerY = 0; 1914 if (deltaY > 0) { 1915 if (increment) { 1916 amountToScroll = - deltaY; 1917 } else { 1918 amountToScroll = mSelectorElementHeight - deltaY; 1919 } 1920 } else { 1921 if (increment) { 1922 amountToScroll = - mSelectorElementHeight - deltaY; 1923 } else { 1924 amountToScroll = - deltaY; 1925 } 1926 } 1927 mFlingScroller.startScroll(0, 0, 0, amountToScroll, SNAP_SCROLL_DURATION); 1928 invalidate(); 1929 } 1930 } 1931 1932 private void snapToClosestValue() { 1933 // adjust to the closest value 1934 int deltaY = mInitialScrollOffset - mCurrentScrollOffset; 1935 if (deltaY != 0) { 1936 mPreviousScrollerY = 0; 1937 if (Math.abs(deltaY) > mSelectorElementHeight / 2) { 1938 deltaY += (deltaY > 0) ? -mSelectorElementHeight : mSelectorElementHeight; 1939 } 1940 mFlingScroller.startScroll(0, 0, 0, deltaY, SNAP_SCROLL_DURATION); 1941 invalidate(); 1942 } 1943 } 1944 1945 /** 1946 * Command for setting the input text selection. 1947 */ 1948 class SetSelectionCommand implements Runnable { 1949 private int mSelectionStart; 1950 1951 private int mSelectionEnd; 1952 1953 public void run() { 1954 mInputText.setSelection(mSelectionStart, mSelectionEnd); 1955 } 1956 } 1957 1958 /** 1959 * Command for changing the current value from a long press by one. 1960 */ 1961 class ChangeCurrentByOneFromLongPressCommand implements Runnable { 1962 private boolean mIncrement; 1963 1964 private void setStep(boolean increment) { 1965 mIncrement = increment; 1966 } 1967 1968 @Override 1969 public void run() { 1970 changeValueByOne(mIncrement); 1971 postDelayed(this, mLongPressUpdateInterval); 1972 } 1973 } 1974 1975 /** 1976 * @hide 1977 */ 1978 public static class CustomEditText extends EditText { 1979 1980 public CustomEditText(Context context, AttributeSet attrs) { 1981 super(context, attrs); 1982 } 1983 1984 @Override 1985 public void onEditorAction(int actionCode) { 1986 super.onEditorAction(actionCode); 1987 if (actionCode == EditorInfo.IME_ACTION_DONE) { 1988 clearFocus(); 1989 } 1990 } 1991 } 1992 1993 /** 1994 * Command for beginning soft input on long press. 1995 */ 1996 class BeginSoftInputOnLongPressCommand implements Runnable { 1997 1998 @Override 1999 public void run() { 2000 showSoftInput(); 2001 mIngonreMoveEvents = true; 2002 } 2003 } 2004 2005 class AccessibilityNodeProviderImpl extends AccessibilityNodeProvider { 2006 private static final int VIRTUAL_VIEW_ID_INCREMENT = 1; 2007 2008 private static final int VIRTUAL_VIEW_ID_INPUT = 2; 2009 2010 private static final int VIRTUAL_VIEW_ID_DECREMENT = 3; 2011 2012 private final Rect mTempRect = new Rect(); 2013 2014 private final int[] mTempArray = new int[2]; 2015 2016 @Override 2017 public AccessibilityNodeInfo createAccessibilityNodeInfo(int virtualViewId) { 2018 switch (virtualViewId) { 2019 case View.NO_ID: 2020 return createAccessibilityNodeInfoForNumberPicker( mScrollX, mScrollY, 2021 mScrollX + (mRight - mLeft), mScrollY + (mBottom - mTop)); 2022 case VIRTUAL_VIEW_ID_DECREMENT: 2023 return createAccessibilityNodeInfoForVirtualButton(VIRTUAL_VIEW_ID_DECREMENT, 2024 getVirtualDecrementButtonText(), mScrollX, mScrollY, 2025 mScrollX + (mRight - mLeft), 2026 mTopSelectionDividerTop + mSelectionDividerHeight); 2027 case VIRTUAL_VIEW_ID_INPUT: 2028 return createAccessibiltyNodeInfoForInputText(); 2029 case VIRTUAL_VIEW_ID_INCREMENT: 2030 return createAccessibilityNodeInfoForVirtualButton(VIRTUAL_VIEW_ID_INCREMENT, 2031 getVirtualIncrementButtonText(), mScrollX, 2032 mBottomSelectionDividerBottom - mSelectionDividerHeight, 2033 mScrollX + (mRight - mLeft), mScrollY + (mBottom - mTop)); 2034 } 2035 return super.createAccessibilityNodeInfo(virtualViewId); 2036 } 2037 2038 @Override 2039 public List<AccessibilityNodeInfo> findAccessibilityNodeInfosByText(String searched, 2040 int virtualViewId) { 2041 if (TextUtils.isEmpty(searched)) { 2042 return Collections.emptyList(); 2043 } 2044 String searchedLowerCase = searched.toLowerCase(); 2045 List<AccessibilityNodeInfo> result = new ArrayList<AccessibilityNodeInfo>(); 2046 switch (virtualViewId) { 2047 case View.NO_ID: { 2048 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, 2049 VIRTUAL_VIEW_ID_DECREMENT, result); 2050 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, 2051 VIRTUAL_VIEW_ID_INPUT, result); 2052 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, 2053 VIRTUAL_VIEW_ID_INCREMENT, result); 2054 return result; 2055 } 2056 case VIRTUAL_VIEW_ID_DECREMENT: 2057 case VIRTUAL_VIEW_ID_INCREMENT: 2058 case VIRTUAL_VIEW_ID_INPUT: { 2059 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, virtualViewId, 2060 result); 2061 return result; 2062 } 2063 } 2064 return super.findAccessibilityNodeInfosByText(searched, virtualViewId); 2065 } 2066 2067 @Override 2068 public boolean performAccessibilityAction(int action, int virtualViewId) { 2069 switch (virtualViewId) { 2070 case VIRTUAL_VIEW_ID_INPUT: { 2071 switch (action) { 2072 case AccessibilityNodeInfo.ACTION_FOCUS: { 2073 if (!mInputText.isFocused()) { 2074 return mInputText.requestFocus(); 2075 } 2076 } break; 2077 case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { 2078 if (mInputText.isFocused()) { 2079 mInputText.clearFocus(); 2080 return true; 2081 } 2082 } break; 2083 } 2084 } break; 2085 } 2086 return super.performAccessibilityAction(action, virtualViewId); 2087 } 2088 2089 public void sendAccessibilityEventForVirtualView(int virtualViewId, int eventType) { 2090 switch (virtualViewId) { 2091 case VIRTUAL_VIEW_ID_DECREMENT: { 2092 sendAccessibilityEventForVirtualButton(virtualViewId, eventType, 2093 getVirtualDecrementButtonText()); 2094 } break; 2095 case VIRTUAL_VIEW_ID_INPUT: { 2096 sendAccessibilityEventForVirtualText(eventType); 2097 } break; 2098 case VIRTUAL_VIEW_ID_INCREMENT: { 2099 sendAccessibilityEventForVirtualButton(virtualViewId, eventType, 2100 getVirtualIncrementButtonText()); 2101 } break; 2102 } 2103 } 2104 2105 private void sendAccessibilityEventForVirtualText(int eventType) { 2106 AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 2107 mInputText.onInitializeAccessibilityEvent(event); 2108 mInputText.onPopulateAccessibilityEvent(event); 2109 event.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT); 2110 requestSendAccessibilityEvent(NumberPicker.this, event); 2111 } 2112 2113 private void sendAccessibilityEventForVirtualButton(int virtualViewId, int eventType, 2114 String text) { 2115 AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 2116 event.setClassName(Button.class.getName()); 2117 event.setPackageName(mContext.getPackageName()); 2118 event.getText().add(text); 2119 event.setEnabled(NumberPicker.this.isEnabled()); 2120 event.setSource(NumberPicker.this, virtualViewId); 2121 requestSendAccessibilityEvent(NumberPicker.this, event); 2122 } 2123 2124 private void findAccessibilityNodeInfosByTextInChild(String searchedLowerCase, 2125 int virtualViewId, List<AccessibilityNodeInfo> outResult) { 2126 switch (virtualViewId) { 2127 case VIRTUAL_VIEW_ID_DECREMENT: { 2128 String text = getVirtualDecrementButtonText(); 2129 if (!TextUtils.isEmpty(text) 2130 && text.toString().toLowerCase().contains(searchedLowerCase)) { 2131 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_DECREMENT)); 2132 } 2133 } return; 2134 case VIRTUAL_VIEW_ID_INPUT: { 2135 CharSequence text = mInputText.getText(); 2136 if (!TextUtils.isEmpty(text) && 2137 text.toString().toLowerCase().contains(searchedLowerCase)) { 2138 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_INPUT)); 2139 return; 2140 } 2141 CharSequence contentDesc = mInputText.getText(); 2142 if (!TextUtils.isEmpty(contentDesc) && 2143 contentDesc.toString().toLowerCase().contains(searchedLowerCase)) { 2144 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_INPUT)); 2145 return; 2146 } 2147 } break; 2148 case VIRTUAL_VIEW_ID_INCREMENT: { 2149 String text = getVirtualIncrementButtonText(); 2150 if (!TextUtils.isEmpty(text) 2151 && text.toString().toLowerCase().contains(searchedLowerCase)) { 2152 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_INCREMENT)); 2153 } 2154 } return; 2155 } 2156 } 2157 2158 private AccessibilityNodeInfo createAccessibiltyNodeInfoForInputText() { 2159 AccessibilityNodeInfo info = mInputText.createAccessibilityNodeInfo(); 2160 info.setLongClickable(true); 2161 info.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT); 2162 return info; 2163 } 2164 2165 private AccessibilityNodeInfo createAccessibilityNodeInfoForVirtualButton(int virtualViewId, 2166 String text, int left, int top, int right, int bottom) { 2167 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(); 2168 info.setClassName(Button.class.getName()); 2169 info.setPackageName(mContext.getPackageName()); 2170 info.setSource(NumberPicker.this, virtualViewId); 2171 info.setParent(NumberPicker.this); 2172 info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_DECREMENT); 2173 info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT); 2174 info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INCREMENT); 2175 info.setText(text); 2176 info.setClickable(true); 2177 info.setLongClickable(true); 2178 info.setEnabled(NumberPicker.this.isEnabled()); 2179 Rect boundsInParent = mTempRect; 2180 boundsInParent.set(left, top, right, bottom); 2181 info.setBoundsInParent(boundsInParent); 2182 Rect boundsInScreen = boundsInParent; 2183 int[] locationOnScreen = mTempArray; 2184 getLocationOnScreen(locationOnScreen); 2185 boundsInScreen.offsetTo(0, 0); 2186 boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]); 2187 info.setBoundsInScreen(boundsInScreen); 2188 return info; 2189 } 2190 2191 private AccessibilityNodeInfo createAccessibilityNodeInfoForNumberPicker(int left, int top, 2192 int right, int bottom) { 2193 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(); 2194 info.setClassName(Button.class.getName()); 2195 info.setPackageName(mContext.getPackageName()); 2196 info.setSource(NumberPicker.this); 2197 info.setParent((View) getParent()); 2198 info.setEnabled(NumberPicker.this.isEnabled()); 2199 info.setScrollable(true); 2200 Rect boundsInParent = mTempRect; 2201 boundsInParent.set(left, top, right, bottom); 2202 info.setBoundsInParent(boundsInParent); 2203 Rect boundsInScreen = boundsInParent; 2204 int[] locationOnScreen = mTempArray; 2205 getLocationOnScreen(locationOnScreen); 2206 boundsInScreen.offsetTo(0, 0); 2207 boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]); 2208 info.setBoundsInScreen(boundsInScreen); 2209 return info; 2210 } 2211 2212 private String getVirtualDecrementButtonText() { 2213 int value = mValue - 1; 2214 if (mWrapSelectorWheel) { 2215 value = getWrappedSelectorIndex(value); 2216 } 2217 if (value >= mMinValue) { 2218 return (mDisplayedValues == null) ? formatNumber(value) 2219 : mDisplayedValues[value - mMinValue]; 2220 } 2221 return null; 2222 } 2223 2224 private String getVirtualIncrementButtonText() { 2225 int value = mValue + 1; 2226 if (mWrapSelectorWheel) { 2227 value = getWrappedSelectorIndex(value); 2228 } 2229 if (value <= mMaxValue) { 2230 return (mDisplayedValues == null) ? formatNumber(value) 2231 : mDisplayedValues[value - mMinValue]; 2232 } 2233 return null; 2234 } 2235 } 2236} 2237