KeyboardView.java revision 29d85df051ca5e888a8f2b42416d09fc931d1a75
1/* 2 * Copyright (C) 2008-2009 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * 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, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17package android.inputmethodservice; 18 19import android.content.Context; 20import android.content.res.TypedArray; 21import android.graphics.Bitmap; 22import android.graphics.Canvas; 23import android.graphics.Paint; 24import android.graphics.PorterDuff; 25import android.graphics.Rect; 26import android.graphics.Typeface; 27import android.graphics.Paint.Align; 28import android.graphics.Region.Op; 29import android.graphics.drawable.Drawable; 30import android.inputmethodservice.Keyboard.Key; 31import android.os.Handler; 32import android.os.Message; 33import android.util.AttributeSet; 34import android.util.TypedValue; 35import android.view.GestureDetector; 36import android.view.Gravity; 37import android.view.LayoutInflater; 38import android.view.MotionEvent; 39import android.view.View; 40import android.view.ViewConfiguration; 41import android.view.ViewGroup.LayoutParams; 42import android.widget.PopupWindow; 43import android.widget.TextView; 44 45import com.android.internal.R; 46 47import java.util.Arrays; 48import java.util.HashMap; 49import java.util.List; 50import java.util.Map; 51 52/** 53 * A view that renders a virtual {@link Keyboard}. It handles rendering of keys and 54 * detecting key presses and touch movements. 55 * 56 * @attr ref android.R.styleable#KeyboardView_keyBackground 57 * @attr ref android.R.styleable#KeyboardView_keyPreviewLayout 58 * @attr ref android.R.styleable#KeyboardView_keyPreviewOffset 59 * @attr ref android.R.styleable#KeyboardView_labelTextSize 60 * @attr ref android.R.styleable#KeyboardView_keyTextSize 61 * @attr ref android.R.styleable#KeyboardView_keyTextColor 62 * @attr ref android.R.styleable#KeyboardView_verticalCorrection 63 * @attr ref android.R.styleable#KeyboardView_popupLayout 64 */ 65public class KeyboardView extends View implements View.OnClickListener { 66 67 /** 68 * Listener for virtual keyboard events. 69 */ 70 public interface OnKeyboardActionListener { 71 72 /** 73 * Called when the user presses a key. This is sent before the {@link #onKey} is called. 74 * For keys that repeat, this is only called once. 75 * @param primaryCode the unicode of the key being pressed. If the touch is not on a valid 76 * key, the value will be zero. 77 */ 78 void onPress(int primaryCode); 79 80 /** 81 * Called when the user releases a key. This is sent after the {@link #onKey} is called. 82 * For keys that repeat, this is only called once. 83 * @param primaryCode the code of the key that was released 84 */ 85 void onRelease(int primaryCode); 86 87 /** 88 * Send a key press to the listener. 89 * @param primaryCode this is the key that was pressed 90 * @param keyCodes the codes for all the possible alternative keys 91 * with the primary code being the first. If the primary key code is 92 * a single character such as an alphabet or number or symbol, the alternatives 93 * will include other characters that may be on the same key or adjacent keys. 94 * These codes are useful to correct for accidental presses of a key adjacent to 95 * the intended key. 96 */ 97 void onKey(int primaryCode, int[] keyCodes); 98 99 /** 100 * Sends a sequence of characters to the listener. 101 * @param text the sequence of characters to be displayed. 102 */ 103 void onText(CharSequence text); 104 105 /** 106 * Called when the user quickly moves the finger from right to left. 107 */ 108 void swipeLeft(); 109 110 /** 111 * Called when the user quickly moves the finger from left to right. 112 */ 113 void swipeRight(); 114 115 /** 116 * Called when the user quickly moves the finger from up to down. 117 */ 118 void swipeDown(); 119 120 /** 121 * Called when the user quickly moves the finger from down to up. 122 */ 123 void swipeUp(); 124 } 125 126 private static final boolean DEBUG = false; 127 private static final int NOT_A_KEY = -1; 128 private static final int[] KEY_DELETE = { Keyboard.KEYCODE_DELETE }; 129 private static final int[] LONG_PRESSABLE_STATE_SET = { R.attr.state_long_pressable }; 130 131 private Keyboard mKeyboard; 132 private int mCurrentKeyIndex = NOT_A_KEY; 133 private int mLabelTextSize; 134 private int mKeyTextSize; 135 private int mKeyTextColor; 136 private float mShadowRadius; 137 private int mShadowColor; 138 private float mBackgroundDimAmount; 139 140 private TextView mPreviewText; 141 private PopupWindow mPreviewPopup; 142 private int mPreviewTextSizeLarge; 143 private int mPreviewOffset; 144 private int mPreviewHeight; 145 private int[] mOffsetInWindow; 146 147 private PopupWindow mPopupKeyboard; 148 private View mMiniKeyboardContainer; 149 private KeyboardView mMiniKeyboard; 150 private boolean mMiniKeyboardOnScreen; 151 private View mPopupParent; 152 private int mMiniKeyboardOffsetX; 153 private int mMiniKeyboardOffsetY; 154 private Map<Key,View> mMiniKeyboardCache; 155 private int[] mWindowOffset; 156 private Key[] mKeys; 157 158 /** Listener for {@link OnKeyboardActionListener}. */ 159 private OnKeyboardActionListener mKeyboardActionListener; 160 161 private static final int MSG_SHOW_PREVIEW = 1; 162 private static final int MSG_REMOVE_PREVIEW = 2; 163 private static final int MSG_REPEAT = 3; 164 private static final int MSG_LONGPRESS = 4; 165 166 private static final int DELAY_BEFORE_PREVIEW = 0; 167 private static final int DELAY_AFTER_PREVIEW = 70; 168 169 private int mVerticalCorrection; 170 private int mProximityThreshold; 171 172 private boolean mPreviewCentered = false; 173 private boolean mShowPreview = true; 174 private boolean mShowTouchPoints = true; 175 private int mPopupPreviewX; 176 private int mPopupPreviewY; 177 178 private int mLastX; 179 private int mLastY; 180 private int mStartX; 181 private int mStartY; 182 183 private boolean mProximityCorrectOn; 184 185 private Paint mPaint; 186 private Rect mPadding; 187 188 private long mDownTime; 189 private long mLastMoveTime; 190 private int mLastKey; 191 private int mLastCodeX; 192 private int mLastCodeY; 193 private int mCurrentKey = NOT_A_KEY; 194 private long mLastKeyTime; 195 private long mCurrentKeyTime; 196 private int[] mKeyIndices = new int[12]; 197 private GestureDetector mGestureDetector; 198 private int mPopupX; 199 private int mPopupY; 200 private int mRepeatKeyIndex = NOT_A_KEY; 201 private int mPopupLayout; 202 private boolean mAbortKey; 203 private Key mInvalidatedKey; 204 private Rect mClipRegion = new Rect(0, 0, 0, 0); 205 206 // Variables for dealing with multiple pointers 207 private int mOldPointerCount = 1; 208 private float mOldPointerX; 209 private float mOldPointerY; 210 211 private Drawable mKeyBackground; 212 213 private static final int REPEAT_INTERVAL = 50; // ~20 keys per second 214 private static final int REPEAT_START_DELAY = 400; 215 private static final int LONGPRESS_TIMEOUT = ViewConfiguration.getLongPressTimeout(); 216 217 private static int MAX_NEARBY_KEYS = 12; 218 private int[] mDistances = new int[MAX_NEARBY_KEYS]; 219 220 // For multi-tap 221 private int mLastSentIndex; 222 private int mTapCount; 223 private long mLastTapTime; 224 private boolean mInMultiTap; 225 private static final int MULTITAP_INTERVAL = 800; // milliseconds 226 private StringBuilder mPreviewLabel = new StringBuilder(1); 227 228 /** Whether the keyboard bitmap needs to be redrawn before it's blitted. **/ 229 private boolean mDrawPending; 230 /** The dirty region in the keyboard bitmap */ 231 private Rect mDirtyRect = new Rect(); 232 /** The keyboard bitmap for faster updates */ 233 private Bitmap mBuffer; 234 /** Notes if the keyboard just changed, so that we could possibly reallocate the mBuffer. */ 235 private boolean mKeyboardChanged; 236 /** The canvas for the above mutable keyboard bitmap */ 237 private Canvas mCanvas; 238 239 Handler mHandler = new Handler() { 240 @Override 241 public void handleMessage(Message msg) { 242 switch (msg.what) { 243 case MSG_SHOW_PREVIEW: 244 showKey(msg.arg1); 245 break; 246 case MSG_REMOVE_PREVIEW: 247 mPreviewText.setVisibility(INVISIBLE); 248 break; 249 case MSG_REPEAT: 250 if (repeatKey()) { 251 Message repeat = Message.obtain(this, MSG_REPEAT); 252 sendMessageDelayed(repeat, REPEAT_INTERVAL); 253 } 254 break; 255 case MSG_LONGPRESS: 256 openPopupIfRequired((MotionEvent) msg.obj); 257 break; 258 } 259 } 260 }; 261 262 public KeyboardView(Context context, AttributeSet attrs) { 263 this(context, attrs, com.android.internal.R.attr.keyboardViewStyle); 264 } 265 266 public KeyboardView(Context context, AttributeSet attrs, int defStyle) { 267 super(context, attrs, defStyle); 268 269 TypedArray a = 270 context.obtainStyledAttributes( 271 attrs, android.R.styleable.KeyboardView, defStyle, 0); 272 273 LayoutInflater inflate = 274 (LayoutInflater) context 275 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 276 277 int previewLayout = 0; 278 int keyTextSize = 0; 279 280 int n = a.getIndexCount(); 281 282 for (int i = 0; i < n; i++) { 283 int attr = a.getIndex(i); 284 285 switch (attr) { 286 case com.android.internal.R.styleable.KeyboardView_keyBackground: 287 mKeyBackground = a.getDrawable(attr); 288 break; 289 case com.android.internal.R.styleable.KeyboardView_verticalCorrection: 290 mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); 291 break; 292 case com.android.internal.R.styleable.KeyboardView_keyPreviewLayout: 293 previewLayout = a.getResourceId(attr, 0); 294 break; 295 case com.android.internal.R.styleable.KeyboardView_keyPreviewOffset: 296 mPreviewOffset = a.getDimensionPixelOffset(attr, 0); 297 break; 298 case com.android.internal.R.styleable.KeyboardView_keyPreviewHeight: 299 mPreviewHeight = a.getDimensionPixelSize(attr, 80); 300 break; 301 case com.android.internal.R.styleable.KeyboardView_keyTextSize: 302 mKeyTextSize = a.getDimensionPixelSize(attr, 18); 303 break; 304 case com.android.internal.R.styleable.KeyboardView_keyTextColor: 305 mKeyTextColor = a.getColor(attr, 0xFF000000); 306 break; 307 case com.android.internal.R.styleable.KeyboardView_labelTextSize: 308 mLabelTextSize = a.getDimensionPixelSize(attr, 14); 309 break; 310 case com.android.internal.R.styleable.KeyboardView_popupLayout: 311 mPopupLayout = a.getResourceId(attr, 0); 312 break; 313 case com.android.internal.R.styleable.KeyboardView_shadowColor: 314 mShadowColor = a.getColor(attr, 0); 315 break; 316 case com.android.internal.R.styleable.KeyboardView_shadowRadius: 317 mShadowRadius = a.getFloat(attr, 0f); 318 break; 319 } 320 } 321 322 a = mContext.obtainStyledAttributes( 323 com.android.internal.R.styleable.Theme); 324 mBackgroundDimAmount = a.getFloat(android.R.styleable.Theme_backgroundDimAmount, 0.5f); 325 326 mPreviewPopup = new PopupWindow(context); 327 if (previewLayout != 0) { 328 mPreviewText = (TextView) inflate.inflate(previewLayout, null); 329 mPreviewTextSizeLarge = (int) mPreviewText.getTextSize(); 330 mPreviewPopup.setContentView(mPreviewText); 331 mPreviewPopup.setBackgroundDrawable(null); 332 } else { 333 mShowPreview = false; 334 } 335 336 mPreviewPopup.setTouchable(false); 337 338 mPopupKeyboard = new PopupWindow(context); 339 mPopupKeyboard.setBackgroundDrawable(null); 340 //mPopupKeyboard.setClippingEnabled(false); 341 342 mPopupParent = this; 343 //mPredicting = true; 344 345 mPaint = new Paint(); 346 mPaint.setAntiAlias(true); 347 mPaint.setTextSize(keyTextSize); 348 mPaint.setTextAlign(Align.CENTER); 349 mPaint.setAlpha(255); 350 351 mPadding = new Rect(0, 0, 0, 0); 352 mMiniKeyboardCache = new HashMap<Key,View>(); 353 mKeyBackground.getPadding(mPadding); 354 355 resetMultiTap(); 356 initGestureDetector(); 357 } 358 359 private void initGestureDetector() { 360 mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { 361 @Override 362 public boolean onFling(MotionEvent me1, MotionEvent me2, 363 float velocityX, float velocityY) { 364 final float absX = Math.abs(velocityX); 365 final float absY = Math.abs(velocityY); 366 if (velocityX > 500 && absY < absX) { 367 swipeRight(); 368 return true; 369 } else if (velocityX < -500 && absY < absX) { 370 swipeLeft(); 371 return true; 372 } else if (velocityY < -500 && absX < absY) { 373 swipeUp(); 374 return true; 375 } else if (velocityY > 500 && absX < 200) { 376 swipeDown(); 377 return true; 378 } else if (absX > 800 || absY > 800) { 379 return true; 380 } 381 return false; 382 } 383 }); 384 385 mGestureDetector.setIsLongpressEnabled(false); 386 } 387 388 public void setOnKeyboardActionListener(OnKeyboardActionListener listener) { 389 mKeyboardActionListener = listener; 390 } 391 392 /** 393 * Returns the {@link OnKeyboardActionListener} object. 394 * @return the listener attached to this keyboard 395 */ 396 protected OnKeyboardActionListener getOnKeyboardActionListener() { 397 return mKeyboardActionListener; 398 } 399 400 /** 401 * Attaches a keyboard to this view. The keyboard can be switched at any time and the 402 * view will re-layout itself to accommodate the keyboard. 403 * @see Keyboard 404 * @see #getKeyboard() 405 * @param keyboard the keyboard to display in this view 406 */ 407 public void setKeyboard(Keyboard keyboard) { 408 if (mKeyboard != null) { 409 showPreview(NOT_A_KEY); 410 } 411 mKeyboard = keyboard; 412 List<Key> keys = mKeyboard.getKeys(); 413 mKeys = keys.toArray(new Key[keys.size()]); 414 requestLayout(); 415 // Hint to reallocate the buffer if the size changed 416 mKeyboardChanged = true; 417 invalidateAllKeys(); 418 computeProximityThreshold(keyboard); 419 mMiniKeyboardCache.clear(); // Not really necessary to do every time, but will free up views 420 // Switching to a different keyboard should abort any pending keys so that the key up 421 // doesn't get delivered to the old or new keyboard 422 mAbortKey = true; // Until the next ACTION_DOWN 423 } 424 425 /** 426 * Returns the current keyboard being displayed by this view. 427 * @return the currently attached keyboard 428 * @see #setKeyboard(Keyboard) 429 */ 430 public Keyboard getKeyboard() { 431 return mKeyboard; 432 } 433 434 /** 435 * Sets the state of the shift key of the keyboard, if any. 436 * @param shifted whether or not to enable the state of the shift key 437 * @return true if the shift key state changed, false if there was no change 438 * @see KeyboardView#isShifted() 439 */ 440 public boolean setShifted(boolean shifted) { 441 if (mKeyboard != null) { 442 if (mKeyboard.setShifted(shifted)) { 443 // The whole keyboard probably needs to be redrawn 444 invalidateAllKeys(); 445 return true; 446 } 447 } 448 return false; 449 } 450 451 /** 452 * Returns the state of the shift key of the keyboard, if any. 453 * @return true if the shift is in a pressed state, false otherwise. If there is 454 * no shift key on the keyboard or there is no keyboard attached, it returns false. 455 * @see KeyboardView#setShifted(boolean) 456 */ 457 public boolean isShifted() { 458 if (mKeyboard != null) { 459 return mKeyboard.isShifted(); 460 } 461 return false; 462 } 463 464 /** 465 * Enables or disables the key feedback popup. This is a popup that shows a magnified 466 * version of the depressed key. By default the preview is enabled. 467 * @param previewEnabled whether or not to enable the key feedback popup 468 * @see #isPreviewEnabled() 469 */ 470 public void setPreviewEnabled(boolean previewEnabled) { 471 mShowPreview = previewEnabled; 472 } 473 474 /** 475 * Returns the enabled state of the key feedback popup. 476 * @return whether or not the key feedback popup is enabled 477 * @see #setPreviewEnabled(boolean) 478 */ 479 public boolean isPreviewEnabled() { 480 return mShowPreview; 481 } 482 483 public void setVerticalCorrection(int verticalOffset) { 484 485 } 486 public void setPopupParent(View v) { 487 mPopupParent = v; 488 } 489 490 public void setPopupOffset(int x, int y) { 491 mMiniKeyboardOffsetX = x; 492 mMiniKeyboardOffsetY = y; 493 if (mPreviewPopup.isShowing()) { 494 mPreviewPopup.dismiss(); 495 } 496 } 497 498 /** 499 * When enabled, calls to {@link OnKeyboardActionListener#onKey} will include key 500 * codes for adjacent keys. When disabled, only the primary key code will be 501 * reported. 502 * @param enabled whether or not the proximity correction is enabled 503 */ 504 public void setProximityCorrectionEnabled(boolean enabled) { 505 mProximityCorrectOn = enabled; 506 } 507 508 /** 509 * Returns true if proximity correction is enabled. 510 */ 511 public boolean isProximityCorrectionEnabled() { 512 return mProximityCorrectOn; 513 } 514 515 /** 516 * Popup keyboard close button clicked. 517 * @hide 518 */ 519 public void onClick(View v) { 520 dismissPopupKeyboard(); 521 } 522 523 private CharSequence adjustCase(CharSequence label) { 524 if (mKeyboard.isShifted() && label != null && label.length() < 3 525 && Character.isLowerCase(label.charAt(0))) { 526 label = label.toString().toUpperCase(); 527 } 528 return label; 529 } 530 531 @Override 532 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 533 // Round up a little 534 if (mKeyboard == null) { 535 setMeasuredDimension(mPaddingLeft + mPaddingRight, mPaddingTop + mPaddingBottom); 536 } else { 537 int width = mKeyboard.getMinWidth() + mPaddingLeft + mPaddingRight; 538 if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) { 539 width = MeasureSpec.getSize(widthMeasureSpec); 540 } 541 setMeasuredDimension(width, mKeyboard.getHeight() + mPaddingTop + mPaddingBottom); 542 } 543 } 544 545 /** 546 * Compute the average distance between adjacent keys (horizontally and vertically) 547 * and square it to get the proximity threshold. We use a square here and in computing 548 * the touch distance from a key's center to avoid taking a square root. 549 * @param keyboard 550 */ 551 private void computeProximityThreshold(Keyboard keyboard) { 552 if (keyboard == null) return; 553 final Key[] keys = mKeys; 554 if (keys == null) return; 555 int length = keys.length; 556 int dimensionSum = 0; 557 for (int i = 0; i < length; i++) { 558 Key key = keys[i]; 559 dimensionSum += Math.min(key.width, key.height) + key.gap; 560 } 561 if (dimensionSum < 0 || length == 0) return; 562 mProximityThreshold = (int) (dimensionSum * 1.4f / length); 563 mProximityThreshold *= mProximityThreshold; // Square it 564 } 565 566 @Override 567 public void onSizeChanged(int w, int h, int oldw, int oldh) { 568 super.onSizeChanged(w, h, oldw, oldh); 569 // Release the buffer, if any and it will be reallocated on the next draw 570 mBuffer = null; 571 } 572 573 @Override 574 public void onDraw(Canvas canvas) { 575 super.onDraw(canvas); 576 if (mDrawPending || mBuffer == null || mKeyboardChanged) { 577 onBufferDraw(); 578 } 579 canvas.drawBitmap(mBuffer, 0, 0, null); 580 } 581 582 private void onBufferDraw() { 583 if (mBuffer == null || mKeyboardChanged) { 584 if (mBuffer == null || mKeyboardChanged && 585 (mBuffer.getWidth() != getWidth() || mBuffer.getHeight() != getHeight())) { 586 mBuffer = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888); 587 mCanvas = new Canvas(mBuffer); 588 } 589 invalidateAllKeys(); 590 mKeyboardChanged = false; 591 } 592 final Canvas canvas = mCanvas; 593 canvas.clipRect(mDirtyRect, Op.REPLACE); 594 595 if (mKeyboard == null) return; 596 597 final Paint paint = mPaint; 598 final Drawable keyBackground = mKeyBackground; 599 final Rect clipRegion = mClipRegion; 600 final Rect padding = mPadding; 601 final int kbdPaddingLeft = mPaddingLeft; 602 final int kbdPaddingTop = mPaddingTop; 603 final Key[] keys = mKeys; 604 final Key invalidKey = mInvalidatedKey; 605 606 paint.setColor(mKeyTextColor); 607 boolean drawSingleKey = false; 608 if (invalidKey != null && canvas.getClipBounds(clipRegion)) { 609 // Is clipRegion completely contained within the invalidated key? 610 if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left && 611 invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top && 612 invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right && 613 invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) { 614 drawSingleKey = true; 615 } 616 } 617 canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); 618 final int keyCount = keys.length; 619 for (int i = 0; i < keyCount; i++) { 620 final Key key = keys[i]; 621 if (drawSingleKey && invalidKey != key) { 622 continue; 623 } 624 int[] drawableState = key.getCurrentDrawableState(); 625 keyBackground.setState(drawableState); 626 627 // Switch the character to uppercase if shift is pressed 628 String label = key.label == null? null : adjustCase(key.label).toString(); 629 630 final Rect bounds = keyBackground.getBounds(); 631 if (key.width != bounds.right || 632 key.height != bounds.bottom) { 633 keyBackground.setBounds(0, 0, key.width, key.height); 634 } 635 canvas.translate(key.x + kbdPaddingLeft, key.y + kbdPaddingTop); 636 keyBackground.draw(canvas); 637 638 if (label != null) { 639 // For characters, use large font. For labels like "Done", use small font. 640 if (label.length() > 1 && key.codes.length < 2) { 641 paint.setTextSize(mLabelTextSize); 642 paint.setTypeface(Typeface.DEFAULT_BOLD); 643 } else { 644 paint.setTextSize(mKeyTextSize); 645 paint.setTypeface(Typeface.DEFAULT); 646 } 647 // Draw a drop shadow for the text 648 paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); 649 // Draw the text 650 canvas.drawText(label, 651 (key.width - padding.left - padding.right) / 2 652 + padding.left, 653 (key.height - padding.top - padding.bottom) / 2 654 + (paint.getTextSize() - paint.descent()) / 2 + padding.top, 655 paint); 656 // Turn off drop shadow 657 paint.setShadowLayer(0, 0, 0, 0); 658 } else if (key.icon != null) { 659 final int drawableX = (key.width - padding.left - padding.right 660 - key.icon.getIntrinsicWidth()) / 2 + padding.left; 661 final int drawableY = (key.height - padding.top - padding.bottom 662 - key.icon.getIntrinsicHeight()) / 2 + padding.top; 663 canvas.translate(drawableX, drawableY); 664 key.icon.setBounds(0, 0, 665 key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight()); 666 key.icon.draw(canvas); 667 canvas.translate(-drawableX, -drawableY); 668 } 669 canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); 670 } 671 mInvalidatedKey = null; 672 // Overlay a dark rectangle to dim the keyboard 673 if (mMiniKeyboardOnScreen) { 674 paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24); 675 canvas.drawRect(0, 0, getWidth(), getHeight(), paint); 676 } 677 678 if (DEBUG && mShowTouchPoints) { 679 paint.setAlpha(128); 680 paint.setColor(0xFFFF0000); 681 canvas.drawCircle(mStartX, mStartY, 3, paint); 682 canvas.drawLine(mStartX, mStartY, mLastX, mLastY, paint); 683 paint.setColor(0xFF0000FF); 684 canvas.drawCircle(mLastX, mLastY, 3, paint); 685 paint.setColor(0xFF00FF00); 686 canvas.drawCircle((mStartX + mLastX) / 2, (mStartY + mLastY) / 2, 2, paint); 687 } 688 689 mDrawPending = false; 690 mDirtyRect.setEmpty(); 691 } 692 693 private int getKeyIndices(int x, int y, int[] allKeys) { 694 final Key[] keys = mKeys; 695 int primaryIndex = NOT_A_KEY; 696 int closestKey = NOT_A_KEY; 697 int closestKeyDist = mProximityThreshold + 1; 698 java.util.Arrays.fill(mDistances, Integer.MAX_VALUE); 699 int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y); 700 final int keyCount = nearestKeyIndices.length; 701 for (int i = 0; i < keyCount; i++) { 702 final Key key = keys[nearestKeyIndices[i]]; 703 int dist = 0; 704 boolean isInside = key.isInside(x,y); 705 if (((mProximityCorrectOn 706 && (dist = key.squaredDistanceFrom(x, y)) < mProximityThreshold) 707 || isInside) 708 && key.codes[0] > 32) { 709 // Find insertion point 710 final int nCodes = key.codes.length; 711 if (dist < closestKeyDist) { 712 closestKeyDist = dist; 713 closestKey = nearestKeyIndices[i]; 714 } 715 716 if (allKeys == null) continue; 717 718 for (int j = 0; j < mDistances.length; j++) { 719 if (mDistances[j] > dist) { 720 // Make space for nCodes codes 721 System.arraycopy(mDistances, j, mDistances, j + nCodes, 722 mDistances.length - j - nCodes); 723 System.arraycopy(allKeys, j, allKeys, j + nCodes, 724 allKeys.length - j - nCodes); 725 for (int c = 0; c < nCodes; c++) { 726 allKeys[j + c] = key.codes[c]; 727 mDistances[j + c] = dist; 728 } 729 break; 730 } 731 } 732 } 733 734 if (isInside) { 735 primaryIndex = nearestKeyIndices[i]; 736 } 737 } 738 if (primaryIndex == NOT_A_KEY) { 739 primaryIndex = closestKey; 740 } 741 return primaryIndex; 742 } 743 744 private void detectAndSendKey(int x, int y, long eventTime) { 745 int index = mCurrentKey; 746 if (index != NOT_A_KEY && index < mKeys.length) { 747 final Key key = mKeys[index]; 748 if (key.text != null) { 749 mKeyboardActionListener.onText(key.text); 750 mKeyboardActionListener.onRelease(NOT_A_KEY); 751 } else { 752 int code = key.codes[0]; 753 //TextEntryState.keyPressedAt(key, x, y); 754 int[] codes = new int[MAX_NEARBY_KEYS]; 755 Arrays.fill(codes, NOT_A_KEY); 756 getKeyIndices(x, y, codes); 757 // Multi-tap 758 if (mInMultiTap) { 759 if (mTapCount != -1) { 760 mKeyboardActionListener.onKey(Keyboard.KEYCODE_DELETE, KEY_DELETE); 761 } else { 762 mTapCount = 0; 763 } 764 code = key.codes[mTapCount]; 765 } 766 mKeyboardActionListener.onKey(code, codes); 767 mKeyboardActionListener.onRelease(code); 768 } 769 mLastSentIndex = index; 770 mLastTapTime = eventTime; 771 } 772 } 773 774 /** 775 * Handle multi-tap keys by producing the key label for the current multi-tap state. 776 */ 777 private CharSequence getPreviewText(Key key) { 778 if (mInMultiTap) { 779 // Multi-tap 780 mPreviewLabel.setLength(0); 781 mPreviewLabel.append((char) key.codes[mTapCount < 0 ? 0 : mTapCount]); 782 return adjustCase(mPreviewLabel); 783 } else { 784 return adjustCase(key.label); 785 } 786 } 787 788 private void showPreview(int keyIndex) { 789 int oldKeyIndex = mCurrentKeyIndex; 790 final PopupWindow previewPopup = mPreviewPopup; 791 792 mCurrentKeyIndex = keyIndex; 793 // Release the old key and press the new key 794 final Key[] keys = mKeys; 795 if (oldKeyIndex != mCurrentKeyIndex) { 796 if (oldKeyIndex != NOT_A_KEY && keys.length > oldKeyIndex) { 797 keys[oldKeyIndex].onReleased(mCurrentKeyIndex == NOT_A_KEY); 798 invalidateKey(oldKeyIndex); 799 } 800 if (mCurrentKeyIndex != NOT_A_KEY && keys.length > mCurrentKeyIndex) { 801 keys[mCurrentKeyIndex].onPressed(); 802 invalidateKey(mCurrentKeyIndex); 803 } 804 } 805 // If key changed and preview is on ... 806 if (oldKeyIndex != mCurrentKeyIndex && mShowPreview) { 807 mHandler.removeMessages(MSG_SHOW_PREVIEW); 808 if (previewPopup.isShowing()) { 809 if (keyIndex == NOT_A_KEY) { 810 mHandler.sendMessageDelayed(mHandler 811 .obtainMessage(MSG_REMOVE_PREVIEW), 812 DELAY_AFTER_PREVIEW); 813 } 814 } 815 if (keyIndex != NOT_A_KEY) { 816 if (previewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) { 817 // Show right away, if it's already visible and finger is moving around 818 showKey(keyIndex); 819 } else { 820 mHandler.sendMessageDelayed( 821 mHandler.obtainMessage(MSG_SHOW_PREVIEW, keyIndex, 0), 822 DELAY_BEFORE_PREVIEW); 823 } 824 } 825 } 826 } 827 828 private void showKey(final int keyIndex) { 829 final PopupWindow previewPopup = mPreviewPopup; 830 final Key[] keys = mKeys; 831 Key key = keys[keyIndex]; 832 if (key.icon != null) { 833 mPreviewText.setCompoundDrawables(null, null, null, 834 key.iconPreview != null ? key.iconPreview : key.icon); 835 mPreviewText.setText(null); 836 } else { 837 mPreviewText.setCompoundDrawables(null, null, null, null); 838 mPreviewText.setText(getPreviewText(key)); 839 if (key.label.length() > 1 && key.codes.length < 2) { 840 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyTextSize); 841 mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); 842 } else { 843 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); 844 mPreviewText.setTypeface(Typeface.DEFAULT); 845 } 846 } 847 mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 848 MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); 849 int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width 850 + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); 851 final int popupHeight = mPreviewHeight; 852 LayoutParams lp = mPreviewText.getLayoutParams(); 853 if (lp != null) { 854 lp.width = popupWidth; 855 lp.height = popupHeight; 856 } 857 if (!mPreviewCentered) { 858 mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + mPaddingLeft; 859 mPopupPreviewY = key.y - popupHeight + mPreviewOffset; 860 } else { 861 // TODO: Fix this if centering is brought back 862 mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2; 863 mPopupPreviewY = - mPreviewText.getMeasuredHeight(); 864 } 865 mHandler.removeMessages(MSG_REMOVE_PREVIEW); 866 if (mOffsetInWindow == null) { 867 mOffsetInWindow = new int[2]; 868 getLocationInWindow(mOffsetInWindow); 869 mOffsetInWindow[0] += mMiniKeyboardOffsetX; // Offset may be zero 870 mOffsetInWindow[1] += mMiniKeyboardOffsetY; // Offset may be zero 871 } 872 // Set the preview background state 873 mPreviewText.getBackground().setState( 874 key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); 875 if (previewPopup.isShowing()) { 876 previewPopup.update(mPopupPreviewX + mOffsetInWindow[0], 877 mPopupPreviewY + mOffsetInWindow[1], 878 popupWidth, popupHeight); 879 } else { 880 previewPopup.setWidth(popupWidth); 881 previewPopup.setHeight(popupHeight); 882 previewPopup.showAtLocation(mPopupParent, Gravity.NO_GRAVITY, 883 mPopupPreviewX + mOffsetInWindow[0], 884 mPopupPreviewY + mOffsetInWindow[1]); 885 } 886 mPreviewText.setVisibility(VISIBLE); 887 } 888 889 /** 890 * Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient 891 * because the keyboard renders the keys to an off-screen buffer and an invalidate() only 892 * draws the cached buffer. 893 * @see #invalidateKey(int) 894 */ 895 public void invalidateAllKeys() { 896 mDirtyRect.union(0, 0, getWidth(), getHeight()); 897 mDrawPending = true; 898 invalidate(); 899 } 900 901 /** 902 * Invalidates a key so that it will be redrawn on the next repaint. Use this method if only 903 * one key is changing it's content. Any changes that affect the position or size of the key 904 * may not be honored. 905 * @param keyIndex the index of the key in the attached {@link Keyboard}. 906 * @see #invalidateAllKeys 907 */ 908 public void invalidateKey(int keyIndex) { 909 if (mKeys == null) return; 910 if (keyIndex < 0 || keyIndex >= mKeys.length) { 911 return; 912 } 913 final Key key = mKeys[keyIndex]; 914 mInvalidatedKey = key; 915 mDirtyRect.union(key.x + mPaddingLeft, key.y + mPaddingTop, 916 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 917 onBufferDraw(); 918 invalidate(key.x + mPaddingLeft, key.y + mPaddingTop, 919 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 920 } 921 922 private boolean openPopupIfRequired(MotionEvent me) { 923 // Check if we have a popup layout specified first. 924 if (mPopupLayout == 0) { 925 return false; 926 } 927 if (mCurrentKey < 0 || mCurrentKey >= mKeys.length) { 928 return false; 929 } 930 931 Key popupKey = mKeys[mCurrentKey]; 932 boolean result = onLongPress(popupKey); 933 if (result) { 934 mAbortKey = true; 935 showPreview(NOT_A_KEY); 936 } 937 return result; 938 } 939 940 /** 941 * Called when a key is long pressed. By default this will open any popup keyboard associated 942 * with this key through the attributes popupLayout and popupCharacters. 943 * @param popupKey the key that was long pressed 944 * @return true if the long press is handled, false otherwise. Subclasses should call the 945 * method on the base class if the subclass doesn't wish to handle the call. 946 */ 947 protected boolean onLongPress(Key popupKey) { 948 int popupKeyboardId = popupKey.popupResId; 949 950 if (popupKeyboardId != 0) { 951 mMiniKeyboardContainer = mMiniKeyboardCache.get(popupKey); 952 if (mMiniKeyboardContainer == null) { 953 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 954 Context.LAYOUT_INFLATER_SERVICE); 955 mMiniKeyboardContainer = inflater.inflate(mPopupLayout, null); 956 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 957 com.android.internal.R.id.keyboardView); 958 View closeButton = mMiniKeyboardContainer.findViewById( 959 com.android.internal.R.id.closeButton); 960 if (closeButton != null) closeButton.setOnClickListener(this); 961 mMiniKeyboard.setOnKeyboardActionListener(new OnKeyboardActionListener() { 962 public void onKey(int primaryCode, int[] keyCodes) { 963 mKeyboardActionListener.onKey(primaryCode, keyCodes); 964 dismissPopupKeyboard(); 965 } 966 967 public void onText(CharSequence text) { 968 mKeyboardActionListener.onText(text); 969 dismissPopupKeyboard(); 970 } 971 972 public void swipeLeft() { } 973 public void swipeRight() { } 974 public void swipeUp() { } 975 public void swipeDown() { } 976 public void onPress(int primaryCode) { 977 mKeyboardActionListener.onPress(primaryCode); 978 } 979 public void onRelease(int primaryCode) { 980 mKeyboardActionListener.onRelease(primaryCode); 981 } 982 }); 983 //mInputView.setSuggest(mSuggest); 984 Keyboard keyboard; 985 if (popupKey.popupCharacters != null) { 986 keyboard = new Keyboard(getContext(), popupKeyboardId, 987 popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); 988 } else { 989 keyboard = new Keyboard(getContext(), popupKeyboardId); 990 } 991 mMiniKeyboard.setKeyboard(keyboard); 992 mMiniKeyboard.setPopupParent(this); 993 mMiniKeyboardContainer.measure( 994 MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), 995 MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST)); 996 997 mMiniKeyboardCache.put(popupKey, mMiniKeyboardContainer); 998 } else { 999 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 1000 com.android.internal.R.id.keyboardView); 1001 } 1002 if (mWindowOffset == null) { 1003 mWindowOffset = new int[2]; 1004 getLocationInWindow(mWindowOffset); 1005 } 1006 mPopupX = popupKey.x + mPaddingLeft; 1007 mPopupY = popupKey.y + mPaddingTop; 1008 mPopupX = mPopupX + popupKey.width - mMiniKeyboardContainer.getMeasuredWidth(); 1009 mPopupY = mPopupY - mMiniKeyboardContainer.getMeasuredHeight(); 1010 final int x = mPopupX + mMiniKeyboardContainer.getPaddingRight() + mWindowOffset[0]; 1011 final int y = mPopupY + mMiniKeyboardContainer.getPaddingBottom() + mWindowOffset[1]; 1012 mMiniKeyboard.setPopupOffset(x < 0 ? 0 : x, y); 1013 mMiniKeyboard.setShifted(isShifted()); 1014 mPopupKeyboard.setContentView(mMiniKeyboardContainer); 1015 mPopupKeyboard.setWidth(mMiniKeyboardContainer.getMeasuredWidth()); 1016 mPopupKeyboard.setHeight(mMiniKeyboardContainer.getMeasuredHeight()); 1017 mPopupKeyboard.showAtLocation(this, Gravity.NO_GRAVITY, x, y); 1018 mMiniKeyboardOnScreen = true; 1019 //mMiniKeyboard.onTouchEvent(getTranslatedEvent(me)); 1020 invalidateAllKeys(); 1021 return true; 1022 } 1023 return false; 1024 } 1025 1026 @Override 1027 public boolean onTouchEvent(MotionEvent me) { 1028 // Convert multi-pointer up/down events to single up/down events to 1029 // deal with the typical multi-pointer behavior of two-thumb typing 1030 int pointerCount = me.getPointerCount(); 1031 boolean result = false; 1032 if (pointerCount != mOldPointerCount) { 1033 long now = me.getEventTime(); 1034 if (pointerCount == 1) { 1035 // Send a down event for the latest pointer 1036 MotionEvent down = MotionEvent.obtain(now, now, MotionEvent.ACTION_DOWN, 1037 me.getX(), me.getY(), me.getMetaState()); 1038 result = onModifiedTouchEvent(down); 1039 down.recycle(); 1040 } else { 1041 // Send an up event for the last pointer 1042 MotionEvent up = MotionEvent.obtain(now, now, MotionEvent.ACTION_UP, 1043 mOldPointerX, mOldPointerY, me.getMetaState()); 1044 result = onModifiedTouchEvent(up); 1045 up.recycle(); 1046 } 1047 } else { 1048 if (pointerCount == 1) { 1049 mOldPointerX = me.getX(); 1050 mOldPointerY = me.getY(); 1051 result = onModifiedTouchEvent(me); 1052 } else { 1053 // Don't do anything when 2 pointers are down and moving. 1054 result = true; 1055 } 1056 } 1057 mOldPointerCount = pointerCount; 1058 return result; 1059 } 1060 1061 private boolean onModifiedTouchEvent(MotionEvent me) { 1062 int touchX = (int) me.getX() - mPaddingLeft; 1063 int touchY = (int) me.getY() + mVerticalCorrection - mPaddingTop; 1064 int action = me.getAction(); 1065 long eventTime = me.getEventTime(); 1066 int keyIndex = getKeyIndices(touchX, touchY, null); 1067 if (mGestureDetector.onTouchEvent(me)) { 1068 showPreview(NOT_A_KEY); 1069 mHandler.removeMessages(MSG_REPEAT); 1070 mHandler.removeMessages(MSG_LONGPRESS); 1071 return true; 1072 } 1073 1074 // Needs to be called after the gesture detector gets a turn, as it may have 1075 // displayed the mini keyboard 1076 if (mMiniKeyboardOnScreen) { 1077 return true; 1078 } 1079 1080 switch (action) { 1081 case MotionEvent.ACTION_DOWN: 1082 mAbortKey = false; 1083 mStartX = touchX; 1084 mStartY = touchY; 1085 mLastCodeX = touchX; 1086 mLastCodeY = touchY; 1087 mLastKeyTime = 0; 1088 mCurrentKeyTime = 0; 1089 mLastKey = NOT_A_KEY; 1090 mCurrentKey = keyIndex; 1091 mDownTime = me.getEventTime(); 1092 mLastMoveTime = mDownTime; 1093 checkMultiTap(eventTime, keyIndex); 1094 mKeyboardActionListener.onPress(keyIndex != NOT_A_KEY ? 1095 mKeys[keyIndex].codes[0] : 0); 1096 if (mCurrentKey >= 0 && mKeys[mCurrentKey].repeatable) { 1097 mRepeatKeyIndex = mCurrentKey; 1098 repeatKey(); 1099 Message msg = mHandler.obtainMessage(MSG_REPEAT); 1100 mHandler.sendMessageDelayed(msg, REPEAT_START_DELAY); 1101 } 1102 if (mCurrentKey != NOT_A_KEY) { 1103 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1104 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1105 } 1106 showPreview(keyIndex); 1107 break; 1108 1109 case MotionEvent.ACTION_MOVE: 1110 boolean continueLongPress = false; 1111 if (keyIndex != NOT_A_KEY) { 1112 if (mCurrentKey == NOT_A_KEY) { 1113 mCurrentKey = keyIndex; 1114 mCurrentKeyTime = eventTime - mDownTime; 1115 } else { 1116 if (keyIndex == mCurrentKey) { 1117 mCurrentKeyTime += eventTime - mLastMoveTime; 1118 continueLongPress = true; 1119 } else { 1120 resetMultiTap(); 1121 mLastKey = mCurrentKey; 1122 mLastCodeX = mLastX; 1123 mLastCodeY = mLastY; 1124 mLastKeyTime = 1125 mCurrentKeyTime + eventTime - mLastMoveTime; 1126 mCurrentKey = keyIndex; 1127 mCurrentKeyTime = 0; 1128 } 1129 } 1130 if (keyIndex != mRepeatKeyIndex) { 1131 mHandler.removeMessages(MSG_REPEAT); 1132 mRepeatKeyIndex = NOT_A_KEY; 1133 } 1134 } 1135 if (!continueLongPress) { 1136 // Cancel old longpress 1137 mHandler.removeMessages(MSG_LONGPRESS); 1138 // Start new longpress if key has changed 1139 if (keyIndex != NOT_A_KEY) { 1140 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1141 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1142 } 1143 } 1144 showPreview(keyIndex); 1145 break; 1146 1147 case MotionEvent.ACTION_UP: 1148 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1149 mHandler.removeMessages(MSG_REPEAT); 1150 mHandler.removeMessages(MSG_LONGPRESS); 1151 if (keyIndex == mCurrentKey) { 1152 mCurrentKeyTime += eventTime - mLastMoveTime; 1153 } else { 1154 resetMultiTap(); 1155 mLastKey = mCurrentKey; 1156 mLastKeyTime = mCurrentKeyTime + eventTime - mLastMoveTime; 1157 mCurrentKey = keyIndex; 1158 mCurrentKeyTime = 0; 1159 } 1160 if (mCurrentKeyTime < mLastKeyTime && mLastKey != NOT_A_KEY) { 1161 mCurrentKey = mLastKey; 1162 touchX = mLastCodeX; 1163 touchY = mLastCodeY; 1164 } 1165 showPreview(NOT_A_KEY); 1166 Arrays.fill(mKeyIndices, NOT_A_KEY); 1167 // If we're not on a repeating key (which sends on a DOWN event) 1168 if (mRepeatKeyIndex == NOT_A_KEY && !mMiniKeyboardOnScreen && !mAbortKey) { 1169 detectAndSendKey(touchX, touchY, eventTime); 1170 } 1171 invalidateKey(keyIndex); 1172 mRepeatKeyIndex = NOT_A_KEY; 1173 break; 1174 } 1175 mLastX = touchX; 1176 mLastY = touchY; 1177 return true; 1178 } 1179 1180 private boolean repeatKey() { 1181 Key key = mKeys[mRepeatKeyIndex]; 1182 detectAndSendKey(key.x, key.y, mLastTapTime); 1183 return true; 1184 } 1185 1186 protected void swipeRight() { 1187 mKeyboardActionListener.swipeRight(); 1188 } 1189 1190 protected void swipeLeft() { 1191 mKeyboardActionListener.swipeLeft(); 1192 } 1193 1194 protected void swipeUp() { 1195 mKeyboardActionListener.swipeUp(); 1196 } 1197 1198 protected void swipeDown() { 1199 mKeyboardActionListener.swipeDown(); 1200 } 1201 1202 public void closing() { 1203 if (mPreviewPopup.isShowing()) { 1204 mPreviewPopup.dismiss(); 1205 } 1206 mHandler.removeMessages(MSG_REPEAT); 1207 mHandler.removeMessages(MSG_LONGPRESS); 1208 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1209 1210 dismissPopupKeyboard(); 1211 mBuffer = null; 1212 mCanvas = null; 1213 mMiniKeyboardCache.clear(); 1214 } 1215 1216 @Override 1217 public void onDetachedFromWindow() { 1218 super.onDetachedFromWindow(); 1219 closing(); 1220 } 1221 1222 private void dismissPopupKeyboard() { 1223 if (mPopupKeyboard.isShowing()) { 1224 mPopupKeyboard.dismiss(); 1225 mMiniKeyboardOnScreen = false; 1226 invalidateAllKeys(); 1227 } 1228 } 1229 1230 public boolean handleBack() { 1231 if (mPopupKeyboard.isShowing()) { 1232 dismissPopupKeyboard(); 1233 return true; 1234 } 1235 return false; 1236 } 1237 1238 private void resetMultiTap() { 1239 mLastSentIndex = NOT_A_KEY; 1240 mTapCount = 0; 1241 mLastTapTime = -1; 1242 mInMultiTap = false; 1243 } 1244 1245 private void checkMultiTap(long eventTime, int keyIndex) { 1246 if (keyIndex == NOT_A_KEY) return; 1247 Key key = mKeys[keyIndex]; 1248 if (key.codes.length > 1) { 1249 mInMultiTap = true; 1250 if (eventTime < mLastTapTime + MULTITAP_INTERVAL 1251 && keyIndex == mLastSentIndex) { 1252 mTapCount = (mTapCount + 1) % key.codes.length; 1253 return; 1254 } else { 1255 mTapCount = -1; 1256 return; 1257 } 1258 } 1259 if (eventTime > mLastTapTime + MULTITAP_INTERVAL || keyIndex != mLastSentIndex) { 1260 resetMultiTap(); 1261 } 1262 } 1263} 1264