NumberPicker.java revision 0d607fbe546ac943de38dad33ae681b09efec6ea
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.os.Bundle; 30import android.text.InputFilter; 31import android.text.InputType; 32import android.text.Spanned; 33import android.text.TextUtils; 34import android.text.method.NumberKeyListener; 35import android.util.AttributeSet; 36import android.util.SparseArray; 37import android.util.TypedValue; 38import android.view.KeyEvent; 39import android.view.LayoutInflater; 40import android.view.LayoutInflater.Filter; 41import android.view.MotionEvent; 42import android.view.VelocityTracker; 43import android.view.View; 44import android.view.ViewConfiguration; 45import android.view.accessibility.AccessibilityEvent; 46import android.view.accessibility.AccessibilityManager; 47import android.view.accessibility.AccessibilityNodeInfo; 48import android.view.accessibility.AccessibilityNodeProvider; 49import android.view.animation.DecelerateInterpolator; 50import android.view.inputmethod.EditorInfo; 51import android.view.inputmethod.InputMethodManager; 52 53import com.android.internal.R; 54 55import java.util.ArrayList; 56import java.util.Collections; 57import java.util.List; 58 59/** 60 * A widget that enables the user to select a number form a predefined range. 61 * There are two flavors of this widget and which one is presented to the user 62 * depends on the current theme. 63 * <ul> 64 * <li> 65 * If the current theme is derived from {@link android.R.style#Theme} the widget 66 * presents the current value as an editable input field with an increment button 67 * above and a decrement button below. Long pressing the buttons allows for a quick 68 * change of the current value. Tapping on the input field allows to type in 69 * a desired value. 70 * </li> 71 * <li> 72 * If the current theme is derived from {@link android.R.style#Theme_Holo} or 73 * {@link android.R.style#Theme_Holo_Light} the widget presents the current 74 * value as an editable input field with a lesser value above and a greater 75 * value below. Tapping on the lesser or greater value selects it by animating 76 * the number axis up or down to make the chosen value current. Flinging up 77 * or down allows for multiple increments or decrements of the current value. 78 * Long pressing on the lesser and greater values also allows for a quick change 79 * of the current value. Tapping on the current value allows to type in a 80 * desired value. 81 * </li> 82 * </ul> 83 * <p> 84 * For an example of using this widget, see {@link android.widget.TimePicker}. 85 * </p> 86 */ 87@Widget 88public class NumberPicker extends LinearLayout { 89 90 /** 91 * The number of items show in the selector wheel. 92 */ 93 private static final int SELECTOR_WHEEL_ITEM_COUNT = 3; 94 95 /** 96 * The default update interval during long press. 97 */ 98 private static final long DEFAULT_LONG_PRESS_UPDATE_INTERVAL = 300; 99 100 /** 101 * The index of the middle selector item. 102 */ 103 private static final int SELECTOR_MIDDLE_ITEM_INDEX = SELECTOR_WHEEL_ITEM_COUNT / 2; 104 105 /** 106 * The coefficient by which to adjust (divide) the max fling velocity. 107 */ 108 private static final int SELECTOR_MAX_FLING_VELOCITY_ADJUSTMENT = 8; 109 110 /** 111 * The the duration for adjusting the selector wheel. 112 */ 113 private static final int SELECTOR_ADJUSTMENT_DURATION_MILLIS = 800; 114 115 /** 116 * The duration of scrolling while snapping to 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 resource id for the default layout. 137 */ 138 private static final int DEFAULT_LAYOUT_RESOURCE_ID = R.layout.number_picker; 139 140 /** 141 * The numbers accepted by the input text's {@link Filter} 142 */ 143 private static final char[] DIGIT_CHARACTERS = new char[] { 144 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' 145 }; 146 147 /** 148 * Constant for unspecified size. 149 */ 150 private static final int SIZE_UNSPECIFIED = -1; 151 152 /** 153 * Use a custom NumberPicker formatting callback to use two-digit minutes 154 * strings like "01". Keeping a static formatter etc. is the most efficient 155 * way to do this; it avoids creating temporary objects on every call to 156 * format(). 157 * 158 * @hide 159 */ 160 public static final NumberPicker.Formatter TWO_DIGIT_FORMATTER = new NumberPicker.Formatter() { 161 final StringBuilder mBuilder = new StringBuilder(); 162 163 final java.util.Formatter mFmt = new java.util.Formatter(mBuilder, java.util.Locale.US); 164 165 final Object[] mArgs = new Object[1]; 166 167 public String format(int value) { 168 mArgs[0] = value; 169 mBuilder.delete(0, mBuilder.length()); 170 mFmt.format("%02d", mArgs); 171 return mFmt.toString(); 172 } 173 }; 174 175 /** 176 * The increment button. 177 */ 178 private final ImageButton mIncrementButton; 179 180 /** 181 * The decrement button. 182 */ 183 private final ImageButton mDecrementButton; 184 185 /** 186 * The text for showing the current value. 187 */ 188 private final EditText mInputText; 189 190 /** 191 * The distance between the two selection dividers. 192 */ 193 private final int mSelectionDividersDistance; 194 195 /** 196 * The min height of this widget. 197 */ 198 private final int mMinHeight; 199 200 /** 201 * The max height of this widget. 202 */ 203 private final int mMaxHeight; 204 205 /** 206 * The max width of this widget. 207 */ 208 private final int mMinWidth; 209 210 /** 211 * The max width of this widget. 212 */ 213 private int mMaxWidth; 214 215 /** 216 * Flag whether to compute the max width. 217 */ 218 private final boolean mComputeMaxWidth; 219 220 /** 221 * The height of the text. 222 */ 223 private final int mTextSize; 224 225 /** 226 * The height of the gap between text elements if the selector wheel. 227 */ 228 private int mSelectorTextGapHeight; 229 230 /** 231 * The values to be displayed instead the indices. 232 */ 233 private String[] mDisplayedValues; 234 235 /** 236 * Lower value of the range of numbers allowed for the NumberPicker 237 */ 238 private int mMinValue; 239 240 /** 241 * Upper value of the range of numbers allowed for the NumberPicker 242 */ 243 private int mMaxValue; 244 245 /** 246 * Current value of this NumberPicker 247 */ 248 private int mValue; 249 250 /** 251 * Listener to be notified upon current value change. 252 */ 253 private OnValueChangeListener mOnValueChangeListener; 254 255 /** 256 * Listener to be notified upon scroll state change. 257 */ 258 private OnScrollListener mOnScrollListener; 259 260 /** 261 * Formatter for for displaying the current value. 262 */ 263 private Formatter mFormatter; 264 265 /** 266 * The speed for updating the value form long press. 267 */ 268 private long mLongPressUpdateInterval = DEFAULT_LONG_PRESS_UPDATE_INTERVAL; 269 270 /** 271 * Cache for the string representation of selector indices. 272 */ 273 private final SparseArray<String> mSelectorIndexToStringCache = new SparseArray<String>(); 274 275 /** 276 * The selector indices whose value are show by the selector. 277 */ 278 private final int[] mSelectorIndices = new int[SELECTOR_WHEEL_ITEM_COUNT]; 279 280 /** 281 * The {@link Paint} for drawing the selector. 282 */ 283 private final Paint mSelectorWheelPaint; 284 285 /** 286 * The {@link Drawable} for pressed virtual (increment/decrement) buttons. 287 */ 288 private final Drawable mVirtualButtonPressedDrawable; 289 290 /** 291 * The height of a selector element (text + gap). 292 */ 293 private int mSelectorElementHeight; 294 295 /** 296 * The initial offset of the scroll selector. 297 */ 298 private int mInitialScrollOffset = Integer.MIN_VALUE; 299 300 /** 301 * The current offset of the scroll selector. 302 */ 303 private int mCurrentScrollOffset; 304 305 /** 306 * The {@link Scroller} responsible for flinging the selector. 307 */ 308 private final Scroller mFlingScroller; 309 310 /** 311 * The {@link Scroller} responsible for adjusting the selector. 312 */ 313 private final Scroller mAdjustScroller; 314 315 /** 316 * The previous Y coordinate while scrolling the selector. 317 */ 318 private int mPreviousScrollerY; 319 320 /** 321 * Handle to the reusable command for setting the input text selection. 322 */ 323 private SetSelectionCommand mSetSelectionCommand; 324 325 /** 326 * Handle to the reusable command for changing the current value from long 327 * press by one. 328 */ 329 private ChangeCurrentByOneFromLongPressCommand mChangeCurrentByOneFromLongPressCommand; 330 331 /** 332 * Command for beginning an edit of the current value via IME on long press. 333 */ 334 private BeginSoftInputOnLongPressCommand mBeginSoftInputOnLongPressCommand; 335 336 /** 337 * The Y position of the last down event. 338 */ 339 private float mLastDownEventY; 340 341 /** 342 * The time of the last down event. 343 */ 344 private long mLastDownEventTime; 345 346 /** 347 * The Y position of the last down or move event. 348 */ 349 private float mLastDownOrMoveEventY; 350 351 /** 352 * Determines speed during touch scrolling. 353 */ 354 private VelocityTracker mVelocityTracker; 355 356 /** 357 * @see ViewConfiguration#getScaledTouchSlop() 358 */ 359 private int mTouchSlop; 360 361 /** 362 * @see ViewConfiguration#getScaledMinimumFlingVelocity() 363 */ 364 private int mMinimumFlingVelocity; 365 366 /** 367 * @see ViewConfiguration#getScaledMaximumFlingVelocity() 368 */ 369 private int mMaximumFlingVelocity; 370 371 /** 372 * Flag whether the selector should wrap around. 373 */ 374 private boolean mWrapSelectorWheel; 375 376 /** 377 * The back ground color used to optimize scroller fading. 378 */ 379 private final int mSolidColor; 380 381 /** 382 * Flag whether this widget has a selector wheel. 383 */ 384 private final boolean mHasSelectorWheel; 385 386 /** 387 * Divider for showing item to be selected while scrolling 388 */ 389 private final Drawable mSelectionDivider; 390 391 /** 392 * The height of the selection divider. 393 */ 394 private final int mSelectionDividerHeight; 395 396 /** 397 * The current scroll state of the number picker. 398 */ 399 private int mScrollState = OnScrollListener.SCROLL_STATE_IDLE; 400 401 /** 402 * Flag whether to ignore move events - we ignore such when we show in IME 403 * to prevent the content from scrolling. 404 */ 405 private boolean mIngonreMoveEvents; 406 407 /** 408 * Flag whether to show soft input on tap. 409 */ 410 private boolean mShowSoftInputOnTap; 411 412 /** 413 * The top of the top selection divider. 414 */ 415 private int mTopSelectionDividerTop; 416 417 /** 418 * The bottom of the bottom selection divider. 419 */ 420 private int mBottomSelectionDividerBottom; 421 422 /** 423 * The virtual id of the last hovered child. 424 */ 425 private int mLastHoveredChildVirtualViewId; 426 427 /** 428 * Whether the increment virtual button is pressed. 429 */ 430 private boolean mIncrementVirtualButtonPressed; 431 432 /** 433 * Whether the decrement virtual button is pressed. 434 */ 435 private boolean mDecrementVirtualButtonPressed; 436 437 /** 438 * Provider to report to clients the semantic structure of this widget. 439 */ 440 private AccessibilityNodeProviderImpl mAccessibilityNodeProvider; 441 442 /** 443 * Helper class for managing pressed state of the virtual buttons. 444 */ 445 private final PressedStateHelper mPressedStateHelper; 446 447 /** 448 * Interface to listen for changes of the current value. 449 */ 450 public interface OnValueChangeListener { 451 452 /** 453 * Called upon a change of the current value. 454 * 455 * @param picker The NumberPicker associated with this listener. 456 * @param oldVal The previous value. 457 * @param newVal The new value. 458 */ 459 void onValueChange(NumberPicker picker, int oldVal, int newVal); 460 } 461 462 /** 463 * Interface to listen for the picker scroll state. 464 */ 465 public interface OnScrollListener { 466 467 /** 468 * The view is not scrolling. 469 */ 470 public static int SCROLL_STATE_IDLE = 0; 471 472 /** 473 * The user is scrolling using touch, and his finger is still on the screen. 474 */ 475 public static int SCROLL_STATE_TOUCH_SCROLL = 1; 476 477 /** 478 * The user had previously been scrolling using touch and performed a fling. 479 */ 480 public static int SCROLL_STATE_FLING = 2; 481 482 /** 483 * Callback invoked while the number picker scroll state has changed. 484 * 485 * @param view The view whose scroll state is being reported. 486 * @param scrollState The current scroll state. One of 487 * {@link #SCROLL_STATE_IDLE}, 488 * {@link #SCROLL_STATE_TOUCH_SCROLL} or 489 * {@link #SCROLL_STATE_IDLE}. 490 */ 491 public void onScrollStateChange(NumberPicker view, int scrollState); 492 } 493 494 /** 495 * Interface used to format current value into a string for presentation. 496 */ 497 public interface Formatter { 498 499 /** 500 * Formats a string representation of the current value. 501 * 502 * @param value The currently selected value. 503 * @return A formatted string representation. 504 */ 505 public String format(int value); 506 } 507 508 /** 509 * Create a new number picker. 510 * 511 * @param context The application environment. 512 */ 513 public NumberPicker(Context context) { 514 this(context, null); 515 } 516 517 /** 518 * Create a new number picker. 519 * 520 * @param context The application environment. 521 * @param attrs A collection of attributes. 522 */ 523 public NumberPicker(Context context, AttributeSet attrs) { 524 this(context, attrs, R.attr.numberPickerStyle); 525 } 526 527 /** 528 * Create a new number picker 529 * 530 * @param context the application environment. 531 * @param attrs a collection of attributes. 532 * @param defStyle The default style to apply to this view. 533 */ 534 public NumberPicker(Context context, AttributeSet attrs, int defStyle) { 535 super(context, attrs, defStyle); 536 537 // process style attributes 538 TypedArray attributesArray = context.obtainStyledAttributes( 539 attrs, R.styleable.NumberPicker, defStyle, 0); 540 final int layoutResId = attributesArray.getResourceId( 541 R.styleable.NumberPicker_internalLayout, DEFAULT_LAYOUT_RESOURCE_ID); 542 543 mHasSelectorWheel = (layoutResId != DEFAULT_LAYOUT_RESOURCE_ID); 544 545 mSolidColor = attributesArray.getColor(R.styleable.NumberPicker_solidColor, 0); 546 547 mSelectionDivider = attributesArray.getDrawable(R.styleable.NumberPicker_selectionDivider); 548 549 final int defSelectionDividerHeight = (int) TypedValue.applyDimension( 550 TypedValue.COMPLEX_UNIT_DIP, UNSCALED_DEFAULT_SELECTION_DIVIDER_HEIGHT, 551 getResources().getDisplayMetrics()); 552 mSelectionDividerHeight = attributesArray.getDimensionPixelSize( 553 R.styleable.NumberPicker_selectionDividerHeight, defSelectionDividerHeight); 554 555 final int defSelectionDividerDistance = (int) TypedValue.applyDimension( 556 TypedValue.COMPLEX_UNIT_DIP, UNSCALED_DEFAULT_SELECTION_DIVIDERS_DISTANCE, 557 getResources().getDisplayMetrics()); 558 mSelectionDividersDistance = attributesArray.getDimensionPixelSize( 559 R.styleable.NumberPicker_selectionDividersDistance, defSelectionDividerDistance); 560 561 mMinHeight = attributesArray.getDimensionPixelSize( 562 R.styleable.NumberPicker_internalMinHeight, SIZE_UNSPECIFIED); 563 564 mMaxHeight = attributesArray.getDimensionPixelSize( 565 R.styleable.NumberPicker_internalMaxHeight, SIZE_UNSPECIFIED); 566 if (mMinHeight != SIZE_UNSPECIFIED && mMaxHeight != SIZE_UNSPECIFIED 567 && mMinHeight > mMaxHeight) { 568 throw new IllegalArgumentException("minHeight > maxHeight"); 569 } 570 571 mMinWidth = attributesArray.getDimensionPixelSize( 572 R.styleable.NumberPicker_internalMinWidth, SIZE_UNSPECIFIED); 573 574 mMaxWidth = attributesArray.getDimensionPixelSize( 575 R.styleable.NumberPicker_internalMaxWidth, SIZE_UNSPECIFIED); 576 if (mMinWidth != SIZE_UNSPECIFIED && mMaxWidth != SIZE_UNSPECIFIED 577 && mMinWidth > mMaxWidth) { 578 throw new IllegalArgumentException("minWidth > maxWidth"); 579 } 580 581 mComputeMaxWidth = (mMaxWidth == SIZE_UNSPECIFIED); 582 583 mVirtualButtonPressedDrawable = attributesArray.getDrawable( 584 R.styleable.NumberPicker_virtualButtonPressedDrawable); 585 586 attributesArray.recycle(); 587 588 mPressedStateHelper = new PressedStateHelper(); 589 590 // By default Linearlayout that we extend is not drawn. This is 591 // its draw() method is not called but dispatchDraw() is called 592 // directly (see ViewGroup.drawChild()). However, this class uses 593 // the fading edge effect implemented by View and we need our 594 // draw() method to be called. Therefore, we declare we will draw. 595 setWillNotDraw(!mHasSelectorWheel); 596 597 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 598 Context.LAYOUT_INFLATER_SERVICE); 599 inflater.inflate(layoutResId, this, true); 600 601 OnClickListener onClickListener = new OnClickListener() { 602 public void onClick(View v) { 603 hideSoftInput(); 604 mInputText.clearFocus(); 605 if (v.getId() == R.id.increment) { 606 changeValueByOne(true); 607 } else { 608 changeValueByOne(false); 609 } 610 } 611 }; 612 613 OnLongClickListener onLongClickListener = new OnLongClickListener() { 614 public boolean onLongClick(View v) { 615 hideSoftInput(); 616 mInputText.clearFocus(); 617 if (v.getId() == R.id.increment) { 618 postChangeCurrentByOneFromLongPress(true, 0); 619 } else { 620 postChangeCurrentByOneFromLongPress(false, 0); 621 } 622 return true; 623 } 624 }; 625 626 // increment button 627 if (!mHasSelectorWheel) { 628 mIncrementButton = (ImageButton) findViewById(R.id.increment); 629 mIncrementButton.setOnClickListener(onClickListener); 630 mIncrementButton.setOnLongClickListener(onLongClickListener); 631 } else { 632 mIncrementButton = null; 633 } 634 635 // decrement button 636 if (!mHasSelectorWheel) { 637 mDecrementButton = (ImageButton) findViewById(R.id.decrement); 638 mDecrementButton.setOnClickListener(onClickListener); 639 mDecrementButton.setOnLongClickListener(onLongClickListener); 640 } else { 641 mDecrementButton = null; 642 } 643 644 // input text 645 mInputText = (EditText) findViewById(R.id.numberpicker_input); 646 mInputText.setOnFocusChangeListener(new OnFocusChangeListener() { 647 public void onFocusChange(View v, boolean hasFocus) { 648 if (hasFocus) { 649 mInputText.selectAll(); 650 } else { 651 mInputText.setSelection(0, 0); 652 validateInputTextView(v); 653 } 654 } 655 }); 656 mInputText.setFilters(new InputFilter[] { 657 new InputTextFilter() 658 }); 659 660 mInputText.setRawInputType(InputType.TYPE_CLASS_NUMBER); 661 mInputText.setImeOptions(EditorInfo.IME_ACTION_DONE); 662 663 // initialize constants 664 ViewConfiguration configuration = ViewConfiguration.get(context); 665 mTouchSlop = configuration.getScaledTouchSlop(); 666 mMinimumFlingVelocity = configuration.getScaledMinimumFlingVelocity(); 667 mMaximumFlingVelocity = configuration.getScaledMaximumFlingVelocity() 668 / SELECTOR_MAX_FLING_VELOCITY_ADJUSTMENT; 669 mTextSize = (int) mInputText.getTextSize(); 670 671 // create the selector wheel paint 672 Paint paint = new Paint(); 673 paint.setAntiAlias(true); 674 paint.setTextAlign(Align.CENTER); 675 paint.setTextSize(mTextSize); 676 paint.setTypeface(mInputText.getTypeface()); 677 ColorStateList colors = mInputText.getTextColors(); 678 int color = colors.getColorForState(ENABLED_STATE_SET, Color.WHITE); 679 paint.setColor(color); 680 mSelectorWheelPaint = paint; 681 682 // create the fling and adjust scrollers 683 mFlingScroller = new Scroller(getContext(), null, true); 684 mAdjustScroller = new Scroller(getContext(), new DecelerateInterpolator(2.5f)); 685 686 updateInputTextView(); 687 688 // If not explicitly specified this view is important for accessibility. 689 if (getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 690 setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); 691 } 692 } 693 694 @Override 695 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 696 if (!mHasSelectorWheel) { 697 super.onLayout(changed, left, top, right, bottom); 698 return; 699 } 700 final int msrdWdth = getMeasuredWidth(); 701 final int msrdHght = getMeasuredHeight(); 702 703 // Input text centered horizontally. 704 final int inptTxtMsrdWdth = mInputText.getMeasuredWidth(); 705 final int inptTxtMsrdHght = mInputText.getMeasuredHeight(); 706 final int inptTxtLeft = (msrdWdth - inptTxtMsrdWdth) / 2; 707 final int inptTxtTop = (msrdHght - inptTxtMsrdHght) / 2; 708 final int inptTxtRight = inptTxtLeft + inptTxtMsrdWdth; 709 final int inptTxtBottom = inptTxtTop + inptTxtMsrdHght; 710 mInputText.layout(inptTxtLeft, inptTxtTop, inptTxtRight, inptTxtBottom); 711 712 if (changed) { 713 // need to do all this when we know our size 714 initializeSelectorWheel(); 715 initializeFadingEdges(); 716 mTopSelectionDividerTop = (getHeight() - mSelectionDividersDistance) / 2 717 - mSelectionDividerHeight; 718 mBottomSelectionDividerBottom = mTopSelectionDividerTop + 2 * mSelectionDividerHeight 719 + mSelectionDividersDistance; 720 } 721 } 722 723 @Override 724 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 725 if (!mHasSelectorWheel) { 726 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 727 return; 728 } 729 // Try greedily to fit the max width and height. 730 final int newWidthMeasureSpec = makeMeasureSpec(widthMeasureSpec, mMaxWidth); 731 final int newHeightMeasureSpec = makeMeasureSpec(heightMeasureSpec, mMaxHeight); 732 super.onMeasure(newWidthMeasureSpec, newHeightMeasureSpec); 733 // Flag if we are measured with width or height less than the respective min. 734 final int widthSize = resolveSizeAndStateRespectingMinSize(mMinWidth, getMeasuredWidth(), 735 widthMeasureSpec); 736 final int heightSize = resolveSizeAndStateRespectingMinSize(mMinHeight, getMeasuredHeight(), 737 heightMeasureSpec); 738 setMeasuredDimension(widthSize, heightSize); 739 } 740 741 /** 742 * Move to the final position of a scroller. Ensures to force finish the scroller 743 * and if it is not at its final position a scroll of the selector wheel is 744 * performed to fast forward to the final position. 745 * 746 * @param scroller The scroller to whose final position to get. 747 * @return True of the a move was performed, i.e. the scroller was not in final position. 748 */ 749 private boolean moveToFinalScrollerPosition(Scroller scroller) { 750 scroller.forceFinished(true); 751 int amountToScroll = scroller.getFinalY() - scroller.getCurrY(); 752 int futureScrollOffset = (mCurrentScrollOffset + amountToScroll) % mSelectorElementHeight; 753 int overshootAdjustment = mInitialScrollOffset - futureScrollOffset; 754 if (overshootAdjustment != 0) { 755 if (Math.abs(overshootAdjustment) > mSelectorElementHeight / 2) { 756 if (overshootAdjustment > 0) { 757 overshootAdjustment -= mSelectorElementHeight; 758 } else { 759 overshootAdjustment += mSelectorElementHeight; 760 } 761 } 762 amountToScroll += overshootAdjustment; 763 scrollBy(0, amountToScroll); 764 return true; 765 } 766 return false; 767 } 768 769 @Override 770 public boolean onInterceptTouchEvent(MotionEvent event) { 771 if (!mHasSelectorWheel || !isEnabled()) { 772 return false; 773 } 774 final int action = event.getActionMasked(); 775 switch (action) { 776 case MotionEvent.ACTION_DOWN: { 777 removeAllCallbacks(); 778 mInputText.setVisibility(View.INVISIBLE); 779 mLastDownOrMoveEventY = mLastDownEventY = event.getY(); 780 mLastDownEventTime = event.getEventTime(); 781 mIngonreMoveEvents = false; 782 mShowSoftInputOnTap = false; 783 // Handle pressed state before any state change. 784 if (mLastDownEventY < mTopSelectionDividerTop) { 785 if (mScrollState == OnScrollListener.SCROLL_STATE_IDLE) { 786 mPressedStateHelper.buttonPressDelayed( 787 PressedStateHelper.BUTTON_DECREMENT); 788 } 789 } else if (mLastDownEventY > mBottomSelectionDividerBottom) { 790 if (mScrollState == OnScrollListener.SCROLL_STATE_IDLE) { 791 mPressedStateHelper.buttonPressDelayed( 792 PressedStateHelper.BUTTON_INCREMENT); 793 } 794 } 795 // Make sure we support flinging inside scrollables. 796 getParent().requestDisallowInterceptTouchEvent(true); 797 if (!mFlingScroller.isFinished()) { 798 mFlingScroller.forceFinished(true); 799 mAdjustScroller.forceFinished(true); 800 onScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE); 801 } else if (!mAdjustScroller.isFinished()) { 802 mFlingScroller.forceFinished(true); 803 mAdjustScroller.forceFinished(true); 804 } else if (mLastDownEventY < mTopSelectionDividerTop) { 805 hideSoftInput(); 806 postChangeCurrentByOneFromLongPress( 807 false, ViewConfiguration.getLongPressTimeout()); 808 } else if (mLastDownEventY > mBottomSelectionDividerBottom) { 809 hideSoftInput(); 810 postChangeCurrentByOneFromLongPress( 811 true, ViewConfiguration.getLongPressTimeout()); 812 } else { 813 mShowSoftInputOnTap = true; 814 postBeginSoftInputOnLongPressCommand(); 815 } 816 return true; 817 } 818 } 819 return false; 820 } 821 822 @Override 823 public boolean onTouchEvent(MotionEvent event) { 824 if (!isEnabled() || !mHasSelectorWheel) { 825 return false; 826 } 827 if (mVelocityTracker == null) { 828 mVelocityTracker = VelocityTracker.obtain(); 829 } 830 mVelocityTracker.addMovement(event); 831 int action = event.getActionMasked(); 832 switch (action) { 833 case MotionEvent.ACTION_MOVE: { 834 if (mIngonreMoveEvents) { 835 break; 836 } 837 float currentMoveY = event.getY(); 838 if (mScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) { 839 int deltaDownY = (int) Math.abs(currentMoveY - mLastDownEventY); 840 if (deltaDownY > mTouchSlop) { 841 removeAllCallbacks(); 842 onScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL); 843 } 844 } else { 845 int deltaMoveY = (int) ((currentMoveY - mLastDownOrMoveEventY)); 846 scrollBy(0, deltaMoveY); 847 invalidate(); 848 } 849 mLastDownOrMoveEventY = currentMoveY; 850 } break; 851 case MotionEvent.ACTION_UP: { 852 removeBeginSoftInputCommand(); 853 removeChangeCurrentByOneFromLongPress(); 854 mPressedStateHelper.cancel(); 855 VelocityTracker velocityTracker = mVelocityTracker; 856 velocityTracker.computeCurrentVelocity(1000, mMaximumFlingVelocity); 857 int initialVelocity = (int) velocityTracker.getYVelocity(); 858 if (Math.abs(initialVelocity) > mMinimumFlingVelocity) { 859 fling(initialVelocity); 860 onScrollStateChange(OnScrollListener.SCROLL_STATE_FLING); 861 } else { 862 int eventY = (int) event.getY(); 863 int deltaMoveY = (int) Math.abs(eventY - mLastDownEventY); 864 long deltaTime = event.getEventTime() - mLastDownEventTime; 865 if (deltaMoveY <= mTouchSlop && deltaTime < ViewConfiguration.getTapTimeout()) { 866 if (mShowSoftInputOnTap) { 867 mShowSoftInputOnTap = false; 868 showSoftInput(); 869 } else { 870 int selectorIndexOffset = (eventY / mSelectorElementHeight) 871 - SELECTOR_MIDDLE_ITEM_INDEX; 872 if (selectorIndexOffset > 0) { 873 changeValueByOne(true); 874 mPressedStateHelper.buttonTapped( 875 PressedStateHelper.BUTTON_INCREMENT); 876 } else if (selectorIndexOffset < 0) { 877 changeValueByOne(false); 878 mPressedStateHelper.buttonTapped( 879 PressedStateHelper.BUTTON_DECREMENT); 880 } 881 } 882 } else { 883 ensureScrollWheelAdjusted(); 884 } 885 onScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE); 886 } 887 mVelocityTracker.recycle(); 888 mVelocityTracker = null; 889 } break; 890 } 891 return true; 892 } 893 894 @Override 895 public boolean dispatchTouchEvent(MotionEvent event) { 896 final int action = event.getActionMasked(); 897 switch (action) { 898 case MotionEvent.ACTION_CANCEL: 899 case MotionEvent.ACTION_UP: 900 removeAllCallbacks(); 901 break; 902 } 903 return super.dispatchTouchEvent(event); 904 } 905 906 @Override 907 public boolean dispatchKeyEvent(KeyEvent event) { 908 final int keyCode = event.getKeyCode(); 909 switch (keyCode) { 910 case KeyEvent.KEYCODE_DPAD_CENTER: 911 case KeyEvent.KEYCODE_ENTER: 912 removeAllCallbacks(); 913 break; 914 } 915 return super.dispatchKeyEvent(event); 916 } 917 918 @Override 919 public boolean dispatchTrackballEvent(MotionEvent event) { 920 final int action = event.getActionMasked(); 921 switch (action) { 922 case MotionEvent.ACTION_CANCEL: 923 case MotionEvent.ACTION_UP: 924 removeAllCallbacks(); 925 break; 926 } 927 return super.dispatchTrackballEvent(event); 928 } 929 930 @Override 931 protected boolean dispatchHoverEvent(MotionEvent event) { 932 if (!mHasSelectorWheel) { 933 return super.dispatchHoverEvent(event); 934 } 935 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 936 final int eventY = (int) event.getY(); 937 final int hoveredVirtualViewId; 938 if (eventY < mTopSelectionDividerTop) { 939 hoveredVirtualViewId = AccessibilityNodeProviderImpl.VIRTUAL_VIEW_ID_DECREMENT; 940 } else if (eventY > mBottomSelectionDividerBottom) { 941 hoveredVirtualViewId = AccessibilityNodeProviderImpl.VIRTUAL_VIEW_ID_INCREMENT; 942 } else { 943 hoveredVirtualViewId = AccessibilityNodeProviderImpl.VIRTUAL_VIEW_ID_INPUT; 944 } 945 final int action = event.getActionMasked(); 946 AccessibilityNodeProviderImpl provider = 947 (AccessibilityNodeProviderImpl) getAccessibilityNodeProvider(); 948 switch (action) { 949 case MotionEvent.ACTION_HOVER_ENTER: { 950 provider.sendAccessibilityEventForVirtualView(hoveredVirtualViewId, 951 AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 952 mLastHoveredChildVirtualViewId = hoveredVirtualViewId; 953 } break; 954 case MotionEvent.ACTION_HOVER_MOVE: { 955 if (mLastHoveredChildVirtualViewId != hoveredVirtualViewId 956 && mLastHoveredChildVirtualViewId != View.NO_ID) { 957 provider.sendAccessibilityEventForVirtualView( 958 mLastHoveredChildVirtualViewId, 959 AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 960 provider.sendAccessibilityEventForVirtualView(hoveredVirtualViewId, 961 AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 962 mLastHoveredChildVirtualViewId = hoveredVirtualViewId; 963 } 964 } break; 965 case MotionEvent.ACTION_HOVER_EXIT: { 966 provider.sendAccessibilityEventForVirtualView(hoveredVirtualViewId, 967 AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 968 mLastHoveredChildVirtualViewId = View.NO_ID; 969 } break; 970 } 971 } 972 return false; 973 } 974 975 @Override 976 public void computeScroll() { 977 Scroller scroller = mFlingScroller; 978 if (scroller.isFinished()) { 979 scroller = mAdjustScroller; 980 if (scroller.isFinished()) { 981 return; 982 } 983 } 984 scroller.computeScrollOffset(); 985 int currentScrollerY = scroller.getCurrY(); 986 if (mPreviousScrollerY == 0) { 987 mPreviousScrollerY = scroller.getStartY(); 988 } 989 scrollBy(0, currentScrollerY - mPreviousScrollerY); 990 mPreviousScrollerY = currentScrollerY; 991 if (scroller.isFinished()) { 992 onScrollerFinished(scroller); 993 } else { 994 invalidate(); 995 } 996 } 997 998 @Override 999 public void setEnabled(boolean enabled) { 1000 super.setEnabled(enabled); 1001 if (!mHasSelectorWheel) { 1002 mIncrementButton.setEnabled(enabled); 1003 } 1004 if (!mHasSelectorWheel) { 1005 mDecrementButton.setEnabled(enabled); 1006 } 1007 mInputText.setEnabled(enabled); 1008 } 1009 1010 @Override 1011 public void scrollBy(int x, int y) { 1012 int[] selectorIndices = mSelectorIndices; 1013 if (!mWrapSelectorWheel && y > 0 1014 && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] <= mMinValue) { 1015 mCurrentScrollOffset = mInitialScrollOffset; 1016 return; 1017 } 1018 if (!mWrapSelectorWheel && y < 0 1019 && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] >= mMaxValue) { 1020 mCurrentScrollOffset = mInitialScrollOffset; 1021 return; 1022 } 1023 mCurrentScrollOffset += y; 1024 while (mCurrentScrollOffset - mInitialScrollOffset > mSelectorTextGapHeight) { 1025 mCurrentScrollOffset -= mSelectorElementHeight; 1026 decrementSelectorIndices(selectorIndices); 1027 setValueInternal(selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX], true); 1028 if (!mWrapSelectorWheel && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] <= mMinValue) { 1029 mCurrentScrollOffset = mInitialScrollOffset; 1030 } 1031 } 1032 while (mCurrentScrollOffset - mInitialScrollOffset < -mSelectorTextGapHeight) { 1033 mCurrentScrollOffset += mSelectorElementHeight; 1034 incrementSelectorIndices(selectorIndices); 1035 setValueInternal(selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX], true); 1036 if (!mWrapSelectorWheel && selectorIndices[SELECTOR_MIDDLE_ITEM_INDEX] >= mMaxValue) { 1037 mCurrentScrollOffset = mInitialScrollOffset; 1038 } 1039 } 1040 } 1041 1042 @Override 1043 public int getSolidColor() { 1044 return mSolidColor; 1045 } 1046 1047 /** 1048 * Sets the listener to be notified on change of the current value. 1049 * 1050 * @param onValueChangedListener The listener. 1051 */ 1052 public void setOnValueChangedListener(OnValueChangeListener onValueChangedListener) { 1053 mOnValueChangeListener = onValueChangedListener; 1054 } 1055 1056 /** 1057 * Set listener to be notified for scroll state changes. 1058 * 1059 * @param onScrollListener The listener. 1060 */ 1061 public void setOnScrollListener(OnScrollListener onScrollListener) { 1062 mOnScrollListener = onScrollListener; 1063 } 1064 1065 /** 1066 * Set the formatter to be used for formatting the current value. 1067 * <p> 1068 * Note: If you have provided alternative values for the values this 1069 * formatter is never invoked. 1070 * </p> 1071 * 1072 * @param formatter The formatter object. If formatter is <code>null</code>, 1073 * {@link String#valueOf(int)} will be used. 1074 *@see #setDisplayedValues(String[]) 1075 */ 1076 public void setFormatter(Formatter formatter) { 1077 if (formatter == mFormatter) { 1078 return; 1079 } 1080 mFormatter = formatter; 1081 initializeSelectorWheelIndices(); 1082 updateInputTextView(); 1083 } 1084 1085 /** 1086 * Set the current value for the number picker. 1087 * <p> 1088 * If the argument is less than the {@link NumberPicker#getMinValue()} and 1089 * {@link NumberPicker#getWrapSelectorWheel()} is <code>false</code> the 1090 * current value is set to the {@link NumberPicker#getMinValue()} value. 1091 * </p> 1092 * <p> 1093 * If the argument is less than the {@link NumberPicker#getMinValue()} and 1094 * {@link NumberPicker#getWrapSelectorWheel()} is <code>true</code> the 1095 * current value is set to the {@link NumberPicker#getMaxValue()} value. 1096 * </p> 1097 * <p> 1098 * If the argument is less than the {@link NumberPicker#getMaxValue()} and 1099 * {@link NumberPicker#getWrapSelectorWheel()} is <code>false</code> the 1100 * current value is set to the {@link NumberPicker#getMaxValue()} value. 1101 * </p> 1102 * <p> 1103 * If the argument is less than the {@link NumberPicker#getMaxValue()} and 1104 * {@link NumberPicker#getWrapSelectorWheel()} is <code>true</code> the 1105 * current value is set to the {@link NumberPicker#getMinValue()} value. 1106 * </p> 1107 * 1108 * @param value The current value. 1109 * @see #setWrapSelectorWheel(boolean) 1110 * @see #setMinValue(int) 1111 * @see #setMaxValue(int) 1112 */ 1113 public void setValue(int value) { 1114 setValueInternal(value, false); 1115 } 1116 1117 /** 1118 * Shows the soft input for its input text. 1119 */ 1120 private void showSoftInput() { 1121 InputMethodManager inputMethodManager = InputMethodManager.peekInstance(); 1122 if (inputMethodManager != null) { 1123 if (mHasSelectorWheel) { 1124 mInputText.setVisibility(View.VISIBLE); 1125 } 1126 mInputText.requestFocus(); 1127 inputMethodManager.showSoftInput(mInputText, 0); 1128 } 1129 } 1130 1131 /** 1132 * Hides the soft input if it is active for the input text. 1133 */ 1134 private void hideSoftInput() { 1135 InputMethodManager inputMethodManager = InputMethodManager.peekInstance(); 1136 if (inputMethodManager != null && inputMethodManager.isActive(mInputText)) { 1137 inputMethodManager.hideSoftInputFromWindow(getWindowToken(), 0); 1138 if (mHasSelectorWheel) { 1139 mInputText.setVisibility(View.INVISIBLE); 1140 } 1141 } 1142 } 1143 1144 /** 1145 * Computes the max width if no such specified as an attribute. 1146 */ 1147 private void tryComputeMaxWidth() { 1148 if (!mComputeMaxWidth) { 1149 return; 1150 } 1151 int maxTextWidth = 0; 1152 if (mDisplayedValues == null) { 1153 float maxDigitWidth = 0; 1154 for (int i = 0; i <= 9; i++) { 1155 final float digitWidth = mSelectorWheelPaint.measureText(String.valueOf(i)); 1156 if (digitWidth > maxDigitWidth) { 1157 maxDigitWidth = digitWidth; 1158 } 1159 } 1160 int numberOfDigits = 0; 1161 int current = mMaxValue; 1162 while (current > 0) { 1163 numberOfDigits++; 1164 current = current / 10; 1165 } 1166 maxTextWidth = (int) (numberOfDigits * maxDigitWidth); 1167 } else { 1168 final int valueCount = mDisplayedValues.length; 1169 for (int i = 0; i < valueCount; i++) { 1170 final float textWidth = mSelectorWheelPaint.measureText(mDisplayedValues[i]); 1171 if (textWidth > maxTextWidth) { 1172 maxTextWidth = (int) textWidth; 1173 } 1174 } 1175 } 1176 maxTextWidth += mInputText.getPaddingLeft() + mInputText.getPaddingRight(); 1177 if (mMaxWidth != maxTextWidth) { 1178 if (maxTextWidth > mMinWidth) { 1179 mMaxWidth = maxTextWidth; 1180 } else { 1181 mMaxWidth = mMinWidth; 1182 } 1183 invalidate(); 1184 } 1185 } 1186 1187 /** 1188 * Gets whether the selector wheel wraps when reaching the min/max value. 1189 * 1190 * @return True if the selector wheel wraps. 1191 * 1192 * @see #getMinValue() 1193 * @see #getMaxValue() 1194 */ 1195 public boolean getWrapSelectorWheel() { 1196 return mWrapSelectorWheel; 1197 } 1198 1199 /** 1200 * Sets whether the selector wheel shown during flinging/scrolling should 1201 * wrap around the {@link NumberPicker#getMinValue()} and 1202 * {@link NumberPicker#getMaxValue()} values. 1203 * <p> 1204 * By default if the range (max - min) is more than the number of items shown 1205 * on the selector wheel the selector wheel wrapping is enabled. 1206 * </p> 1207 * <p> 1208 * <strong>Note:</strong> If the number of items, i.e. the range ( 1209 * {@link #getMaxValue()} - {@link #getMinValue()}) is less than 1210 * the number of items shown on the selector wheel, the selector wheel will 1211 * not wrap. Hence, in such a case calling this method is a NOP. 1212 * </p> 1213 * 1214 * @param wrapSelectorWheel Whether to wrap. 1215 */ 1216 public void setWrapSelectorWheel(boolean wrapSelectorWheel) { 1217 final boolean wrappingAllowed = (mMaxValue - mMinValue) >= mSelectorIndices.length; 1218 if ((!wrapSelectorWheel || wrappingAllowed) && wrapSelectorWheel != mWrapSelectorWheel) { 1219 mWrapSelectorWheel = wrapSelectorWheel; 1220 } 1221 } 1222 1223 /** 1224 * Sets the speed at which the numbers be incremented and decremented when 1225 * the up and down buttons are long pressed respectively. 1226 * <p> 1227 * The default value is 300 ms. 1228 * </p> 1229 * 1230 * @param intervalMillis The speed (in milliseconds) at which the numbers 1231 * will be incremented and decremented. 1232 */ 1233 public void setOnLongPressUpdateInterval(long intervalMillis) { 1234 mLongPressUpdateInterval = intervalMillis; 1235 } 1236 1237 /** 1238 * Returns the value of the picker. 1239 * 1240 * @return The value. 1241 */ 1242 public int getValue() { 1243 return mValue; 1244 } 1245 1246 /** 1247 * Returns the min value of the picker. 1248 * 1249 * @return The min value 1250 */ 1251 public int getMinValue() { 1252 return mMinValue; 1253 } 1254 1255 /** 1256 * Sets the min value of the picker. 1257 * 1258 * @param minValue The min value. 1259 */ 1260 public void setMinValue(int minValue) { 1261 if (mMinValue == minValue) { 1262 return; 1263 } 1264 if (minValue < 0) { 1265 throw new IllegalArgumentException("minValue must be >= 0"); 1266 } 1267 mMinValue = minValue; 1268 if (mMinValue > mValue) { 1269 mValue = mMinValue; 1270 } 1271 boolean wrapSelectorWheel = mMaxValue - mMinValue > mSelectorIndices.length; 1272 setWrapSelectorWheel(wrapSelectorWheel); 1273 initializeSelectorWheelIndices(); 1274 updateInputTextView(); 1275 tryComputeMaxWidth(); 1276 invalidate(); 1277 } 1278 1279 /** 1280 * Returns the max value of the picker. 1281 * 1282 * @return The max value. 1283 */ 1284 public int getMaxValue() { 1285 return mMaxValue; 1286 } 1287 1288 /** 1289 * Sets the max value of the picker. 1290 * 1291 * @param maxValue The max value. 1292 */ 1293 public void setMaxValue(int maxValue) { 1294 if (mMaxValue == maxValue) { 1295 return; 1296 } 1297 if (maxValue < 0) { 1298 throw new IllegalArgumentException("maxValue must be >= 0"); 1299 } 1300 mMaxValue = maxValue; 1301 if (mMaxValue < mValue) { 1302 mValue = mMaxValue; 1303 } 1304 boolean wrapSelectorWheel = mMaxValue - mMinValue > mSelectorIndices.length; 1305 setWrapSelectorWheel(wrapSelectorWheel); 1306 initializeSelectorWheelIndices(); 1307 updateInputTextView(); 1308 tryComputeMaxWidth(); 1309 invalidate(); 1310 } 1311 1312 /** 1313 * Gets the values to be displayed instead of string values. 1314 * 1315 * @return The displayed values. 1316 */ 1317 public String[] getDisplayedValues() { 1318 return mDisplayedValues; 1319 } 1320 1321 /** 1322 * Sets the values to be displayed. 1323 * 1324 * @param displayedValues The displayed values. 1325 */ 1326 public void setDisplayedValues(String[] displayedValues) { 1327 if (mDisplayedValues == displayedValues) { 1328 return; 1329 } 1330 mDisplayedValues = displayedValues; 1331 if (mDisplayedValues != null) { 1332 // Allow text entry rather than strictly numeric entry. 1333 mInputText.setRawInputType(InputType.TYPE_CLASS_TEXT 1334 | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS); 1335 } else { 1336 mInputText.setRawInputType(InputType.TYPE_CLASS_NUMBER); 1337 } 1338 updateInputTextView(); 1339 initializeSelectorWheelIndices(); 1340 tryComputeMaxWidth(); 1341 } 1342 1343 @Override 1344 protected float getTopFadingEdgeStrength() { 1345 return TOP_AND_BOTTOM_FADING_EDGE_STRENGTH; 1346 } 1347 1348 @Override 1349 protected float getBottomFadingEdgeStrength() { 1350 return TOP_AND_BOTTOM_FADING_EDGE_STRENGTH; 1351 } 1352 1353 @Override 1354 protected void onDetachedFromWindow() { 1355 removeAllCallbacks(); 1356 } 1357 1358 @Override 1359 protected void onDraw(Canvas canvas) { 1360 if (!mHasSelectorWheel) { 1361 super.onDraw(canvas); 1362 return; 1363 } 1364 float x = (mRight - mLeft) / 2; 1365 float y = mCurrentScrollOffset; 1366 1367 // draw the virtual buttons pressed state if needed 1368 if (mVirtualButtonPressedDrawable != null 1369 && mScrollState == OnScrollListener.SCROLL_STATE_IDLE) { 1370 if (mDecrementVirtualButtonPressed) { 1371 mVirtualButtonPressedDrawable.setState(PRESSED_STATE_SET); 1372 mVirtualButtonPressedDrawable.setBounds(0, 0, mRight, mTopSelectionDividerTop); 1373 mVirtualButtonPressedDrawable.draw(canvas); 1374 } 1375 if (mIncrementVirtualButtonPressed) { 1376 mVirtualButtonPressedDrawable.setState(PRESSED_STATE_SET); 1377 mVirtualButtonPressedDrawable.setBounds(0, mBottomSelectionDividerBottom, mRight, 1378 mBottom); 1379 mVirtualButtonPressedDrawable.draw(canvas); 1380 } 1381 } 1382 1383 // draw the selector wheel 1384 int[] selectorIndices = mSelectorIndices; 1385 for (int i = 0; i < selectorIndices.length; i++) { 1386 int selectorIndex = selectorIndices[i]; 1387 String scrollSelectorValue = mSelectorIndexToStringCache.get(selectorIndex); 1388 // Do not draw the middle item if input is visible since the input 1389 // is shown only if the wheel is static and it covers the middle 1390 // item. Otherwise, if the user starts editing the text via the 1391 // IME he may see a dimmed version of the old value intermixed 1392 // with the new one. 1393 if (i != SELECTOR_MIDDLE_ITEM_INDEX || mInputText.getVisibility() != VISIBLE) { 1394 canvas.drawText(scrollSelectorValue, x, y, mSelectorWheelPaint); 1395 } 1396 y += mSelectorElementHeight; 1397 } 1398 1399 // draw the selection dividers 1400 if (mSelectionDivider != null) { 1401 // draw the top divider 1402 int topOfTopDivider = mTopSelectionDividerTop; 1403 int bottomOfTopDivider = topOfTopDivider + mSelectionDividerHeight; 1404 mSelectionDivider.setBounds(0, topOfTopDivider, mRight, bottomOfTopDivider); 1405 mSelectionDivider.draw(canvas); 1406 1407 // draw the bottom divider 1408 int bottomOfBottomDivider = mBottomSelectionDividerBottom; 1409 int topOfBottomDivider = bottomOfBottomDivider - mSelectionDividerHeight; 1410 mSelectionDivider.setBounds(0, topOfBottomDivider, mRight, bottomOfBottomDivider); 1411 mSelectionDivider.draw(canvas); 1412 } 1413 } 1414 1415 @Override 1416 public void sendAccessibilityEvent(int eventType) { 1417 // Do not send accessibility events - we want the user to 1418 // perceive this widget as several controls rather as a whole. 1419 } 1420 1421 @Override 1422 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 1423 super.onInitializeAccessibilityEvent(event); 1424 event.setClassName(NumberPicker.class.getName()); 1425 event.setScrollable(true); 1426 event.setScrollY((mMinValue + mValue) * mSelectorElementHeight); 1427 event.setMaxScrollY((mMaxValue - mMinValue) * mSelectorElementHeight); 1428 } 1429 1430 @Override 1431 public AccessibilityNodeProvider getAccessibilityNodeProvider() { 1432 if (!mHasSelectorWheel) { 1433 return super.getAccessibilityNodeProvider(); 1434 } 1435 if (mAccessibilityNodeProvider == null) { 1436 mAccessibilityNodeProvider = new AccessibilityNodeProviderImpl(); 1437 } 1438 return mAccessibilityNodeProvider; 1439 } 1440 1441 /** 1442 * Makes a measure spec that tries greedily to use the max value. 1443 * 1444 * @param measureSpec The measure spec. 1445 * @param maxSize The max value for the size. 1446 * @return A measure spec greedily imposing the max size. 1447 */ 1448 private int makeMeasureSpec(int measureSpec, int maxSize) { 1449 if (maxSize == SIZE_UNSPECIFIED) { 1450 return measureSpec; 1451 } 1452 final int size = MeasureSpec.getSize(measureSpec); 1453 final int mode = MeasureSpec.getMode(measureSpec); 1454 switch (mode) { 1455 case MeasureSpec.EXACTLY: 1456 return measureSpec; 1457 case MeasureSpec.AT_MOST: 1458 return MeasureSpec.makeMeasureSpec(Math.min(size, maxSize), MeasureSpec.EXACTLY); 1459 case MeasureSpec.UNSPECIFIED: 1460 return MeasureSpec.makeMeasureSpec(maxSize, MeasureSpec.EXACTLY); 1461 default: 1462 throw new IllegalArgumentException("Unknown measure mode: " + mode); 1463 } 1464 } 1465 1466 /** 1467 * Utility to reconcile a desired size and state, with constraints imposed 1468 * by a MeasureSpec. Tries to respect the min size, unless a different size 1469 * is imposed by the constraints. 1470 * 1471 * @param minSize The minimal desired size. 1472 * @param measuredSize The currently measured size. 1473 * @param measureSpec The current measure spec. 1474 * @return The resolved size and state. 1475 */ 1476 private int resolveSizeAndStateRespectingMinSize( 1477 int minSize, int measuredSize, int measureSpec) { 1478 if (minSize != SIZE_UNSPECIFIED) { 1479 final int desiredWidth = Math.max(minSize, measuredSize); 1480 return resolveSizeAndState(desiredWidth, measureSpec, 0); 1481 } else { 1482 return measuredSize; 1483 } 1484 } 1485 1486 /** 1487 * Resets the selector indices and clear the cached string representation of 1488 * these indices. 1489 */ 1490 private void initializeSelectorWheelIndices() { 1491 mSelectorIndexToStringCache.clear(); 1492 int[] selectorIndices = mSelectorIndices; 1493 int current = getValue(); 1494 for (int i = 0; i < mSelectorIndices.length; i++) { 1495 int selectorIndex = current + (i - SELECTOR_MIDDLE_ITEM_INDEX); 1496 if (mWrapSelectorWheel) { 1497 selectorIndex = getWrappedSelectorIndex(selectorIndex); 1498 } 1499 selectorIndices[i] = selectorIndex; 1500 ensureCachedScrollSelectorValue(selectorIndices[i]); 1501 } 1502 } 1503 1504 /** 1505 * Sets the current value of this NumberPicker. 1506 * 1507 * @param current The new value of the NumberPicker. 1508 * @param notifyChange Whether to notify if the current value changed. 1509 */ 1510 private void setValueInternal(int current, boolean notifyChange) { 1511 if (mValue == current) { 1512 return; 1513 } 1514 // Wrap around the values if we go past the start or end 1515 if (mWrapSelectorWheel) { 1516 current = getWrappedSelectorIndex(current); 1517 } else { 1518 current = Math.max(current, mMinValue); 1519 current = Math.min(current, mMaxValue); 1520 } 1521 int previous = mValue; 1522 mValue = current; 1523 updateInputTextView(); 1524 if (notifyChange) { 1525 notifyChange(previous, current); 1526 } 1527 initializeSelectorWheelIndices(); 1528 invalidate(); 1529 } 1530 1531 /** 1532 * Changes the current value by one which is increment or 1533 * decrement based on the passes argument. 1534 * decrement the current value. 1535 * 1536 * @param increment True to increment, false to decrement. 1537 */ 1538 private void changeValueByOne(boolean increment) { 1539 if (mHasSelectorWheel) { 1540 mInputText.setVisibility(View.INVISIBLE); 1541 if (!moveToFinalScrollerPosition(mFlingScroller)) { 1542 moveToFinalScrollerPosition(mAdjustScroller); 1543 } 1544 mPreviousScrollerY = 0; 1545 if (increment) { 1546 mFlingScroller.startScroll(0, 0, 0, -mSelectorElementHeight, SNAP_SCROLL_DURATION); 1547 } else { 1548 mFlingScroller.startScroll(0, 0, 0, mSelectorElementHeight, SNAP_SCROLL_DURATION); 1549 } 1550 invalidate(); 1551 } else { 1552 if (increment) { 1553 setValueInternal(mValue + 1, true); 1554 } else { 1555 setValueInternal(mValue - 1, true); 1556 } 1557 } 1558 } 1559 1560 private void initializeSelectorWheel() { 1561 initializeSelectorWheelIndices(); 1562 int[] selectorIndices = mSelectorIndices; 1563 int totalTextHeight = selectorIndices.length * mTextSize; 1564 float totalTextGapHeight = (mBottom - mTop) - totalTextHeight; 1565 float textGapCount = selectorIndices.length; 1566 mSelectorTextGapHeight = (int) (totalTextGapHeight / textGapCount + 0.5f); 1567 mSelectorElementHeight = mTextSize + mSelectorTextGapHeight; 1568 // Ensure that the middle item is positioned the same as the text in 1569 // mInputText 1570 int editTextTextPosition = mInputText.getBaseline() + mInputText.getTop(); 1571 mInitialScrollOffset = editTextTextPosition 1572 - (mSelectorElementHeight * SELECTOR_MIDDLE_ITEM_INDEX); 1573 mCurrentScrollOffset = mInitialScrollOffset; 1574 updateInputTextView(); 1575 } 1576 1577 private void initializeFadingEdges() { 1578 setVerticalFadingEdgeEnabled(true); 1579 setFadingEdgeLength((mBottom - mTop - mTextSize) / 2); 1580 } 1581 1582 /** 1583 * Callback invoked upon completion of a given <code>scroller</code>. 1584 */ 1585 private void onScrollerFinished(Scroller scroller) { 1586 if (scroller == mFlingScroller) { 1587 if (!ensureScrollWheelAdjusted()) { 1588 updateInputTextView(); 1589 } 1590 onScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE); 1591 } else { 1592 if (mScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) { 1593 updateInputTextView(); 1594 } 1595 } 1596 } 1597 1598 /** 1599 * Handles transition to a given <code>scrollState</code> 1600 */ 1601 private void onScrollStateChange(int scrollState) { 1602 if (mScrollState == scrollState) { 1603 return; 1604 } 1605 mScrollState = scrollState; 1606 if (mOnScrollListener != null) { 1607 mOnScrollListener.onScrollStateChange(this, scrollState); 1608 } 1609 } 1610 1611 /** 1612 * Flings the selector with the given <code>velocityY</code>. 1613 */ 1614 private void fling(int velocityY) { 1615 mPreviousScrollerY = 0; 1616 1617 if (velocityY > 0) { 1618 mFlingScroller.fling(0, 0, 0, velocityY, 0, 0, 0, Integer.MAX_VALUE); 1619 } else { 1620 mFlingScroller.fling(0, Integer.MAX_VALUE, 0, velocityY, 0, 0, 0, Integer.MAX_VALUE); 1621 } 1622 1623 invalidate(); 1624 } 1625 1626 /** 1627 * @return The wrapped index <code>selectorIndex</code> value. 1628 */ 1629 private int getWrappedSelectorIndex(int selectorIndex) { 1630 if (selectorIndex > mMaxValue) { 1631 return mMinValue + (selectorIndex - mMaxValue) % (mMaxValue - mMinValue) - 1; 1632 } else if (selectorIndex < mMinValue) { 1633 return mMaxValue - (mMinValue - selectorIndex) % (mMaxValue - mMinValue) + 1; 1634 } 1635 return selectorIndex; 1636 } 1637 1638 /** 1639 * Increments the <code>selectorIndices</code> whose string representations 1640 * will be displayed in the selector. 1641 */ 1642 private void incrementSelectorIndices(int[] selectorIndices) { 1643 for (int i = 0; i < selectorIndices.length - 1; i++) { 1644 selectorIndices[i] = selectorIndices[i + 1]; 1645 } 1646 int nextScrollSelectorIndex = selectorIndices[selectorIndices.length - 2] + 1; 1647 if (mWrapSelectorWheel && nextScrollSelectorIndex > mMaxValue) { 1648 nextScrollSelectorIndex = mMinValue; 1649 } 1650 selectorIndices[selectorIndices.length - 1] = nextScrollSelectorIndex; 1651 ensureCachedScrollSelectorValue(nextScrollSelectorIndex); 1652 } 1653 1654 /** 1655 * Decrements the <code>selectorIndices</code> whose string representations 1656 * will be displayed in the selector. 1657 */ 1658 private void decrementSelectorIndices(int[] selectorIndices) { 1659 for (int i = selectorIndices.length - 1; i > 0; i--) { 1660 selectorIndices[i] = selectorIndices[i - 1]; 1661 } 1662 int nextScrollSelectorIndex = selectorIndices[1] - 1; 1663 if (mWrapSelectorWheel && nextScrollSelectorIndex < mMinValue) { 1664 nextScrollSelectorIndex = mMaxValue; 1665 } 1666 selectorIndices[0] = nextScrollSelectorIndex; 1667 ensureCachedScrollSelectorValue(nextScrollSelectorIndex); 1668 } 1669 1670 /** 1671 * Ensures we have a cached string representation of the given <code> 1672 * selectorIndex</code> to avoid multiple instantiations of the same string. 1673 */ 1674 private void ensureCachedScrollSelectorValue(int selectorIndex) { 1675 SparseArray<String> cache = mSelectorIndexToStringCache; 1676 String scrollSelectorValue = cache.get(selectorIndex); 1677 if (scrollSelectorValue != null) { 1678 return; 1679 } 1680 if (selectorIndex < mMinValue || selectorIndex > mMaxValue) { 1681 scrollSelectorValue = ""; 1682 } else { 1683 if (mDisplayedValues != null) { 1684 int displayedValueIndex = selectorIndex - mMinValue; 1685 scrollSelectorValue = mDisplayedValues[displayedValueIndex]; 1686 } else { 1687 scrollSelectorValue = formatNumber(selectorIndex); 1688 } 1689 } 1690 cache.put(selectorIndex, scrollSelectorValue); 1691 } 1692 1693 private String formatNumber(int value) { 1694 return (mFormatter != null) ? mFormatter.format(value) : String.valueOf(value); 1695 } 1696 1697 private void validateInputTextView(View v) { 1698 String str = String.valueOf(((TextView) v).getText()); 1699 if (TextUtils.isEmpty(str)) { 1700 // Restore to the old value as we don't allow empty values 1701 updateInputTextView(); 1702 } else { 1703 // Check the new value and ensure it's in range 1704 int current = getSelectedPos(str.toString()); 1705 setValueInternal(current, true); 1706 } 1707 } 1708 1709 /** 1710 * Updates the view of this NumberPicker. If displayValues were specified in 1711 * the string corresponding to the index specified by the current value will 1712 * be returned. Otherwise, the formatter specified in {@link #setFormatter} 1713 * will be used to format the number. 1714 * 1715 * @return Whether the text was updated. 1716 */ 1717 private boolean updateInputTextView() { 1718 /* 1719 * If we don't have displayed values then use the current number else 1720 * find the correct value in the displayed values for the current 1721 * number. 1722 */ 1723 String text = (mDisplayedValues == null) ? formatNumber(mValue) 1724 : mDisplayedValues[mValue - mMinValue]; 1725 if (!TextUtils.isEmpty(text) && !text.equals(mInputText.getText().toString())) { 1726 mInputText.setText(text); 1727 return true; 1728 } 1729 1730 return false; 1731 } 1732 1733 /** 1734 * Notifies the listener, if registered, of a change of the value of this 1735 * NumberPicker. 1736 */ 1737 private void notifyChange(int previous, int current) { 1738 if (mOnValueChangeListener != null) { 1739 mOnValueChangeListener.onValueChange(this, previous, mValue); 1740 } 1741 } 1742 1743 /** 1744 * Posts a command for changing the current value by one. 1745 * 1746 * @param increment Whether to increment or decrement the value. 1747 */ 1748 private void postChangeCurrentByOneFromLongPress(boolean increment, long delayMillis) { 1749 if (mChangeCurrentByOneFromLongPressCommand == null) { 1750 mChangeCurrentByOneFromLongPressCommand = new ChangeCurrentByOneFromLongPressCommand(); 1751 } else { 1752 removeCallbacks(mChangeCurrentByOneFromLongPressCommand); 1753 } 1754 mChangeCurrentByOneFromLongPressCommand.setStep(increment); 1755 postDelayed(mChangeCurrentByOneFromLongPressCommand, delayMillis); 1756 } 1757 1758 /** 1759 * Removes the command for changing the current value by one. 1760 */ 1761 private void removeChangeCurrentByOneFromLongPress() { 1762 if (mChangeCurrentByOneFromLongPressCommand != null) { 1763 removeCallbacks(mChangeCurrentByOneFromLongPressCommand); 1764 } 1765 } 1766 1767 /** 1768 * Posts a command for beginning an edit of the current value via IME on 1769 * long press. 1770 */ 1771 private void postBeginSoftInputOnLongPressCommand() { 1772 if (mBeginSoftInputOnLongPressCommand == null) { 1773 mBeginSoftInputOnLongPressCommand = new BeginSoftInputOnLongPressCommand(); 1774 } else { 1775 removeCallbacks(mBeginSoftInputOnLongPressCommand); 1776 } 1777 postDelayed(mBeginSoftInputOnLongPressCommand, ViewConfiguration.getLongPressTimeout()); 1778 } 1779 1780 /** 1781 * Removes the command for beginning an edit of the current value via IME. 1782 */ 1783 private void removeBeginSoftInputCommand() { 1784 if (mBeginSoftInputOnLongPressCommand != null) { 1785 removeCallbacks(mBeginSoftInputOnLongPressCommand); 1786 } 1787 } 1788 1789 /** 1790 * Removes all pending callback from the message queue. 1791 */ 1792 private void removeAllCallbacks() { 1793 if (mChangeCurrentByOneFromLongPressCommand != null) { 1794 removeCallbacks(mChangeCurrentByOneFromLongPressCommand); 1795 } 1796 if (mSetSelectionCommand != null) { 1797 removeCallbacks(mSetSelectionCommand); 1798 } 1799 if (mBeginSoftInputOnLongPressCommand != null) { 1800 removeCallbacks(mBeginSoftInputOnLongPressCommand); 1801 } 1802 mPressedStateHelper.cancel(); 1803 } 1804 1805 /** 1806 * @return The selected index given its displayed <code>value</code>. 1807 */ 1808 private int getSelectedPos(String value) { 1809 if (mDisplayedValues == null) { 1810 try { 1811 return Integer.parseInt(value); 1812 } catch (NumberFormatException e) { 1813 // Ignore as if it's not a number we don't care 1814 } 1815 } else { 1816 for (int i = 0; i < mDisplayedValues.length; i++) { 1817 // Don't force the user to type in jan when ja will do 1818 value = value.toLowerCase(); 1819 if (mDisplayedValues[i].toLowerCase().startsWith(value)) { 1820 return mMinValue + i; 1821 } 1822 } 1823 1824 /* 1825 * The user might have typed in a number into the month field i.e. 1826 * 10 instead of OCT so support that too. 1827 */ 1828 try { 1829 return Integer.parseInt(value); 1830 } catch (NumberFormatException e) { 1831 1832 // Ignore as if it's not a number we don't care 1833 } 1834 } 1835 return mMinValue; 1836 } 1837 1838 /** 1839 * Posts an {@link SetSelectionCommand} from the given <code>selectionStart 1840 * </code> to <code>selectionEnd</code>. 1841 */ 1842 private void postSetSelectionCommand(int selectionStart, int selectionEnd) { 1843 if (mSetSelectionCommand == null) { 1844 mSetSelectionCommand = new SetSelectionCommand(); 1845 } else { 1846 removeCallbacks(mSetSelectionCommand); 1847 } 1848 mSetSelectionCommand.mSelectionStart = selectionStart; 1849 mSetSelectionCommand.mSelectionEnd = selectionEnd; 1850 post(mSetSelectionCommand); 1851 } 1852 1853 /** 1854 * Filter for accepting only valid indices or prefixes of the string 1855 * representation of valid indices. 1856 */ 1857 class InputTextFilter extends NumberKeyListener { 1858 1859 // XXX This doesn't allow for range limits when controlled by a 1860 // soft input method! 1861 public int getInputType() { 1862 return InputType.TYPE_CLASS_TEXT; 1863 } 1864 1865 @Override 1866 protected char[] getAcceptedChars() { 1867 return DIGIT_CHARACTERS; 1868 } 1869 1870 @Override 1871 public CharSequence filter( 1872 CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { 1873 if (mDisplayedValues == null) { 1874 CharSequence filtered = super.filter(source, start, end, dest, dstart, dend); 1875 if (filtered == null) { 1876 filtered = source.subSequence(start, end); 1877 } 1878 1879 String result = String.valueOf(dest.subSequence(0, dstart)) + filtered 1880 + dest.subSequence(dend, dest.length()); 1881 1882 if ("".equals(result)) { 1883 return result; 1884 } 1885 int val = getSelectedPos(result); 1886 1887 /* 1888 * Ensure the user can't type in a value greater than the max 1889 * allowed. We have to allow less than min as the user might 1890 * want to delete some numbers and then type a new number. 1891 */ 1892 if (val > mMaxValue) { 1893 return ""; 1894 } else { 1895 return filtered; 1896 } 1897 } else { 1898 CharSequence filtered = String.valueOf(source.subSequence(start, end)); 1899 if (TextUtils.isEmpty(filtered)) { 1900 return ""; 1901 } 1902 String result = String.valueOf(dest.subSequence(0, dstart)) + filtered 1903 + dest.subSequence(dend, dest.length()); 1904 String str = String.valueOf(result).toLowerCase(); 1905 for (String val : mDisplayedValues) { 1906 String valLowerCase = val.toLowerCase(); 1907 if (valLowerCase.startsWith(str)) { 1908 postSetSelectionCommand(result.length(), val.length()); 1909 return val.subSequence(dstart, val.length()); 1910 } 1911 } 1912 return ""; 1913 } 1914 } 1915 } 1916 1917 /** 1918 * Ensures that the scroll wheel is adjusted i.e. there is no offset and the 1919 * middle element is in the middle of the widget. 1920 * 1921 * @return Whether an adjustment has been made. 1922 */ 1923 private boolean ensureScrollWheelAdjusted() { 1924 // adjust to the closest value 1925 int deltaY = mInitialScrollOffset - mCurrentScrollOffset; 1926 if (deltaY != 0) { 1927 mPreviousScrollerY = 0; 1928 if (Math.abs(deltaY) > mSelectorElementHeight / 2) { 1929 deltaY += (deltaY > 0) ? -mSelectorElementHeight : mSelectorElementHeight; 1930 } 1931 mAdjustScroller.startScroll(0, 0, 0, deltaY, SELECTOR_ADJUSTMENT_DURATION_MILLIS); 1932 invalidate(); 1933 return true; 1934 } 1935 return false; 1936 } 1937 1938 class PressedStateHelper implements Runnable { 1939 public static final int BUTTON_INCREMENT = 1; 1940 public static final int BUTTON_DECREMENT = 2; 1941 1942 private final int MODE_PRESS = 1; 1943 private final int MODE_TAPPED = 2; 1944 1945 private int mManagedButton; 1946 private int mMode; 1947 1948 public void cancel() { 1949 mMode = 0; 1950 mManagedButton = 0; 1951 NumberPicker.this.removeCallbacks(this); 1952 if (mIncrementVirtualButtonPressed) { 1953 mIncrementVirtualButtonPressed = false; 1954 invalidate(0, mBottomSelectionDividerBottom, mRight, mBottom); 1955 } 1956 mDecrementVirtualButtonPressed = false; 1957 if (mDecrementVirtualButtonPressed) { 1958 invalidate(0, 0, mRight, mTopSelectionDividerTop); 1959 } 1960 } 1961 1962 public void buttonPressDelayed(int button) { 1963 cancel(); 1964 mMode = MODE_PRESS; 1965 mManagedButton = button; 1966 NumberPicker.this.postDelayed(this, ViewConfiguration.getTapTimeout()); 1967 } 1968 1969 public void buttonTapped(int button) { 1970 cancel(); 1971 mMode = MODE_TAPPED; 1972 mManagedButton = button; 1973 NumberPicker.this.post(this); 1974 } 1975 1976 @Override 1977 public void run() { 1978 switch (mMode) { 1979 case MODE_PRESS: { 1980 switch (mManagedButton) { 1981 case BUTTON_INCREMENT: { 1982 mIncrementVirtualButtonPressed = true; 1983 invalidate(0, mBottomSelectionDividerBottom, mRight, mBottom); 1984 } break; 1985 case BUTTON_DECREMENT: { 1986 mDecrementVirtualButtonPressed = true; 1987 invalidate(0, 0, mRight, mTopSelectionDividerTop); 1988 } 1989 } 1990 } break; 1991 case MODE_TAPPED: { 1992 switch (mManagedButton) { 1993 case BUTTON_INCREMENT: { 1994 if (!mIncrementVirtualButtonPressed) { 1995 NumberPicker.this.postDelayed(this, 1996 ViewConfiguration.getPressedStateDuration()); 1997 } 1998 mIncrementVirtualButtonPressed ^= true; 1999 invalidate(0, mBottomSelectionDividerBottom, mRight, mBottom); 2000 } break; 2001 case BUTTON_DECREMENT: { 2002 if (!mDecrementVirtualButtonPressed) { 2003 NumberPicker.this.postDelayed(this, 2004 ViewConfiguration.getPressedStateDuration()); 2005 } 2006 mDecrementVirtualButtonPressed ^= true; 2007 invalidate(0, 0, mRight, mTopSelectionDividerTop); 2008 } 2009 } 2010 } break; 2011 } 2012 } 2013 } 2014 2015 /** 2016 * Command for setting the input text selection. 2017 */ 2018 class SetSelectionCommand implements Runnable { 2019 private int mSelectionStart; 2020 2021 private int mSelectionEnd; 2022 2023 public void run() { 2024 mInputText.setSelection(mSelectionStart, mSelectionEnd); 2025 } 2026 } 2027 2028 /** 2029 * Command for changing the current value from a long press by one. 2030 */ 2031 class ChangeCurrentByOneFromLongPressCommand implements Runnable { 2032 private boolean mIncrement; 2033 2034 private void setStep(boolean increment) { 2035 mIncrement = increment; 2036 } 2037 2038 @Override 2039 public void run() { 2040 changeValueByOne(mIncrement); 2041 postDelayed(this, mLongPressUpdateInterval); 2042 } 2043 } 2044 2045 /** 2046 * @hide 2047 */ 2048 public static class CustomEditText extends EditText { 2049 2050 public CustomEditText(Context context, AttributeSet attrs) { 2051 super(context, attrs); 2052 } 2053 2054 @Override 2055 public void onEditorAction(int actionCode) { 2056 super.onEditorAction(actionCode); 2057 if (actionCode == EditorInfo.IME_ACTION_DONE) { 2058 clearFocus(); 2059 } 2060 } 2061 } 2062 2063 /** 2064 * Command for beginning soft input on long press. 2065 */ 2066 class BeginSoftInputOnLongPressCommand implements Runnable { 2067 2068 @Override 2069 public void run() { 2070 showSoftInput(); 2071 mIngonreMoveEvents = true; 2072 } 2073 } 2074 2075 class AccessibilityNodeProviderImpl extends AccessibilityNodeProvider { 2076 private static final int VIRTUAL_VIEW_ID_INCREMENT = 1; 2077 2078 private static final int VIRTUAL_VIEW_ID_INPUT = 2; 2079 2080 private static final int VIRTUAL_VIEW_ID_DECREMENT = 3; 2081 2082 private final Rect mTempRect = new Rect(); 2083 2084 private final int[] mTempArray = new int[2]; 2085 2086 @Override 2087 public AccessibilityNodeInfo createAccessibilityNodeInfo(int virtualViewId) { 2088 switch (virtualViewId) { 2089 case View.NO_ID: 2090 return createAccessibilityNodeInfoForNumberPicker( mScrollX, mScrollY, 2091 mScrollX + (mRight - mLeft), mScrollY + (mBottom - mTop)); 2092 case VIRTUAL_VIEW_ID_DECREMENT: 2093 return createAccessibilityNodeInfoForVirtualButton(VIRTUAL_VIEW_ID_DECREMENT, 2094 getVirtualDecrementButtonText(), mScrollX, mScrollY, 2095 mScrollX + (mRight - mLeft), 2096 mTopSelectionDividerTop + mSelectionDividerHeight); 2097 case VIRTUAL_VIEW_ID_INPUT: 2098 return createAccessibiltyNodeInfoForInputText(); 2099 case VIRTUAL_VIEW_ID_INCREMENT: 2100 return createAccessibilityNodeInfoForVirtualButton(VIRTUAL_VIEW_ID_INCREMENT, 2101 getVirtualIncrementButtonText(), mScrollX, 2102 mBottomSelectionDividerBottom - mSelectionDividerHeight, 2103 mScrollX + (mRight - mLeft), mScrollY + (mBottom - mTop)); 2104 } 2105 return super.createAccessibilityNodeInfo(virtualViewId); 2106 } 2107 2108 @Override 2109 public List<AccessibilityNodeInfo> findAccessibilityNodeInfosByText(String searched, 2110 int virtualViewId) { 2111 if (TextUtils.isEmpty(searched)) { 2112 return Collections.emptyList(); 2113 } 2114 String searchedLowerCase = searched.toLowerCase(); 2115 List<AccessibilityNodeInfo> result = new ArrayList<AccessibilityNodeInfo>(); 2116 switch (virtualViewId) { 2117 case View.NO_ID: { 2118 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, 2119 VIRTUAL_VIEW_ID_DECREMENT, result); 2120 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, 2121 VIRTUAL_VIEW_ID_INPUT, result); 2122 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, 2123 VIRTUAL_VIEW_ID_INCREMENT, result); 2124 return result; 2125 } 2126 case VIRTUAL_VIEW_ID_DECREMENT: 2127 case VIRTUAL_VIEW_ID_INCREMENT: 2128 case VIRTUAL_VIEW_ID_INPUT: { 2129 findAccessibilityNodeInfosByTextInChild(searchedLowerCase, virtualViewId, 2130 result); 2131 return result; 2132 } 2133 } 2134 return super.findAccessibilityNodeInfosByText(searched, virtualViewId); 2135 } 2136 2137 @Override 2138 public boolean performAction(int virtualViewId, int action, Bundle arguments) { 2139 switch (virtualViewId) { 2140 case VIRTUAL_VIEW_ID_INPUT: { 2141 switch (action) { 2142 case AccessibilityNodeInfo.ACTION_FOCUS: { 2143 if (!mInputText.isFocused()) { 2144 return mInputText.requestFocus(); 2145 } 2146 } break; 2147 case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { 2148 if (mInputText.isFocused()) { 2149 mInputText.clearFocus(); 2150 return true; 2151 } 2152 } break; 2153 } 2154 } break; 2155 } 2156 return super.performAction(virtualViewId, action, arguments); 2157 } 2158 2159 public void sendAccessibilityEventForVirtualView(int virtualViewId, int eventType) { 2160 switch (virtualViewId) { 2161 case VIRTUAL_VIEW_ID_DECREMENT: { 2162 sendAccessibilityEventForVirtualButton(virtualViewId, eventType, 2163 getVirtualDecrementButtonText()); 2164 } break; 2165 case VIRTUAL_VIEW_ID_INPUT: { 2166 sendAccessibilityEventForVirtualText(eventType); 2167 } break; 2168 case VIRTUAL_VIEW_ID_INCREMENT: { 2169 sendAccessibilityEventForVirtualButton(virtualViewId, eventType, 2170 getVirtualIncrementButtonText()); 2171 } break; 2172 } 2173 } 2174 2175 private void sendAccessibilityEventForVirtualText(int eventType) { 2176 AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 2177 mInputText.onInitializeAccessibilityEvent(event); 2178 mInputText.onPopulateAccessibilityEvent(event); 2179 event.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT); 2180 requestSendAccessibilityEvent(NumberPicker.this, event); 2181 } 2182 2183 private void sendAccessibilityEventForVirtualButton(int virtualViewId, int eventType, 2184 String text) { 2185 AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 2186 event.setClassName(Button.class.getName()); 2187 event.setPackageName(mContext.getPackageName()); 2188 event.getText().add(text); 2189 event.setEnabled(NumberPicker.this.isEnabled()); 2190 event.setSource(NumberPicker.this, virtualViewId); 2191 requestSendAccessibilityEvent(NumberPicker.this, event); 2192 } 2193 2194 private void findAccessibilityNodeInfosByTextInChild(String searchedLowerCase, 2195 int virtualViewId, List<AccessibilityNodeInfo> outResult) { 2196 switch (virtualViewId) { 2197 case VIRTUAL_VIEW_ID_DECREMENT: { 2198 String text = getVirtualDecrementButtonText(); 2199 if (!TextUtils.isEmpty(text) 2200 && text.toString().toLowerCase().contains(searchedLowerCase)) { 2201 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_DECREMENT)); 2202 } 2203 } return; 2204 case VIRTUAL_VIEW_ID_INPUT: { 2205 CharSequence text = mInputText.getText(); 2206 if (!TextUtils.isEmpty(text) && 2207 text.toString().toLowerCase().contains(searchedLowerCase)) { 2208 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_INPUT)); 2209 return; 2210 } 2211 CharSequence contentDesc = mInputText.getText(); 2212 if (!TextUtils.isEmpty(contentDesc) && 2213 contentDesc.toString().toLowerCase().contains(searchedLowerCase)) { 2214 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_INPUT)); 2215 return; 2216 } 2217 } break; 2218 case VIRTUAL_VIEW_ID_INCREMENT: { 2219 String text = getVirtualIncrementButtonText(); 2220 if (!TextUtils.isEmpty(text) 2221 && text.toString().toLowerCase().contains(searchedLowerCase)) { 2222 outResult.add(createAccessibilityNodeInfo(VIRTUAL_VIEW_ID_INCREMENT)); 2223 } 2224 } return; 2225 } 2226 } 2227 2228 private AccessibilityNodeInfo createAccessibiltyNodeInfoForInputText() { 2229 AccessibilityNodeInfo info = mInputText.createAccessibilityNodeInfo(); 2230 info.setLongClickable(true); 2231 info.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT); 2232 return info; 2233 } 2234 2235 private AccessibilityNodeInfo createAccessibilityNodeInfoForVirtualButton(int virtualViewId, 2236 String text, int left, int top, int right, int bottom) { 2237 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(); 2238 info.setClassName(Button.class.getName()); 2239 info.setPackageName(mContext.getPackageName()); 2240 info.setSource(NumberPicker.this, virtualViewId); 2241 info.setParent(NumberPicker.this); 2242 info.setText(text); 2243 info.setClickable(true); 2244 info.setLongClickable(true); 2245 info.setEnabled(NumberPicker.this.isEnabled()); 2246 Rect boundsInParent = mTempRect; 2247 boundsInParent.set(left, top, right, bottom); 2248 info.setVisibleToUser(isVisibleToUser(boundsInParent)); 2249 info.setBoundsInParent(boundsInParent); 2250 Rect boundsInScreen = boundsInParent; 2251 int[] locationOnScreen = mTempArray; 2252 getLocationOnScreen(locationOnScreen); 2253 boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]); 2254 info.setBoundsInScreen(boundsInScreen); 2255 return info; 2256 } 2257 2258 private AccessibilityNodeInfo createAccessibilityNodeInfoForNumberPicker(int left, int top, 2259 int right, int bottom) { 2260 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(); 2261 info.setClassName(NumberPicker.class.getName()); 2262 info.setPackageName(mContext.getPackageName()); 2263 info.setSource(NumberPicker.this); 2264 info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_DECREMENT); 2265 info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT); 2266 info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INCREMENT); 2267 info.setParent((View) getParent()); 2268 info.setEnabled(NumberPicker.this.isEnabled()); 2269 info.setScrollable(true); 2270 Rect boundsInParent = mTempRect; 2271 boundsInParent.set(left, top, right, bottom); 2272 info.setBoundsInParent(boundsInParent); 2273 info.setVisibleToUser(isVisibleToUser()); 2274 Rect boundsInScreen = boundsInParent; 2275 int[] locationOnScreen = mTempArray; 2276 getLocationOnScreen(locationOnScreen); 2277 boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]); 2278 info.setBoundsInScreen(boundsInScreen); 2279 return info; 2280 } 2281 2282 private String getVirtualDecrementButtonText() { 2283 int value = mValue - 1; 2284 if (mWrapSelectorWheel) { 2285 value = getWrappedSelectorIndex(value); 2286 } 2287 if (value >= mMinValue) { 2288 return (mDisplayedValues == null) ? formatNumber(value) 2289 : mDisplayedValues[value - mMinValue]; 2290 } 2291 return null; 2292 } 2293 2294 private String getVirtualIncrementButtonText() { 2295 int value = mValue + 1; 2296 if (mWrapSelectorWheel) { 2297 value = getWrappedSelectorIndex(value); 2298 } 2299 if (value <= mMaxValue) { 2300 return (mDisplayedValues == null) ? formatNumber(value) 2301 : mDisplayedValues[value - mMinValue]; 2302 } 2303 return null; 2304 } 2305 } 2306} 2307