C# android.getActionMasked方法代码示例

		public virtual bool onTouchEvent(android.view.MotionEvent @event)
		{
			if (mInputEventConsistencyVerifier != null)
			{
				mInputEventConsistencyVerifier.onTouchEvent(@event, 0);
			}
			int action = @event.getActionMasked();
			if (action == android.view.MotionEvent.ACTION_DOWN)
			{
				reset();
			}
			// Start fresh
			bool handled = true;
			if (mInvalidGesture)
			{
				handled = false;
			}
			else
			{
				if (!mGestureInProgress)
				{
					switch (action)
					{
						case android.view.MotionEvent.ACTION_DOWN:
						{
							mActiveId0 = @event.getPointerId(0);
							mActive0MostRecent = true;
							break;
						}

						case android.view.MotionEvent.ACTION_UP:
						{
							reset();
							break;
						}

						case android.view.MotionEvent.ACTION_POINTER_DOWN:
						{
							// We have a new multi-finger gesture
							// as orientation can change, query the metrics in touch down
							android.util.DisplayMetrics metrics = mContext.getResources().getDisplayMetrics();
							mRightSlopEdge = metrics.widthPixels - mEdgeSlop;
							mBottomSlopEdge = metrics.heightPixels - mEdgeSlop;
							if (mPrevEvent != null)
							{
								mPrevEvent.recycle();
							}
							mPrevEvent = android.view.MotionEvent.obtain(@event);
							mTimeDelta = 0;
							int index1 = @event.getActionIndex();
							int index0 = @event.findPointerIndex(mActiveId0);
							mActiveId1 = @event.getPointerId(index1);
							if (index0 < 0 || index0 == index1)
							{
								// Probably someone sending us a broken event stream.
								index0 = findNewActiveIndex(@event, index0 == index1 ? -1 : mActiveId1, index0);
								mActiveId0 = @event.getPointerId(index0);
							}
							mActive0MostRecent = false;
							setContext(@event);
							// Check if we have a sloppy gesture. If so, delay
							// the beginning of the gesture until we're sure that's
							// what the user wanted. Sloppy gestures can happen if the
							// edge of the user's hand is touching the screen, for example.
							float edgeSlop = mEdgeSlop;
							float rightSlop = mRightSlopEdge;
							float bottomSlop = mBottomSlopEdge;
							float x0 = getRawX(@event, index0);
							float y0 = getRawY(@event, index0);
							float x1 = getRawX(@event, index1);
							float y1 = getRawY(@event, index1);
							bool p0sloppy = x0 < edgeSlop || y0 < edgeSlop || x0 > rightSlop || y0 > bottomSlop;
							bool p1sloppy = x1 < edgeSlop || y1 < edgeSlop || x1 > rightSlop || y1 > bottomSlop;
							if (p0sloppy && p1sloppy)
							{
								mFocusX = -1;
								mFocusY = -1;
								mSloppyGesture = true;
							}
							else
							{
								if (p0sloppy)
								{
									mFocusX = @event.getX(index1);
									mFocusY = @event.getY(index1);
									mSloppyGesture = true;
								}
								else
								{
									if (p1sloppy)
									{
										mFocusX = @event.getX(index0);
										mFocusY = @event.getY(index0);
										mSloppyGesture = true;
									}
									else
									{
										mSloppyGesture = false;
										mGestureInProgress = mListener.onScaleBegin(this);
									}
//.........这里部分代码省略.........

//.........这里部分代码省略.........
						case android.view.MotionEvent.ACTION_MOVE:
						{
							int expectedPointerCount = Sharpen.Util.IntGetBitCount(mTouchEventStreamPointers);
							if (pointerCount != expectedPointerCount)
							{
								problem("ACTION_MOVE contained " + pointerCount + " pointers but there are currently "
									 + expectedPointerCount + " pointers down.");
								mTouchEventStreamIsTainted = true;
							}
							break;
						}

						case android.view.MotionEvent.ACTION_CANCEL:
						{
							mTouchEventStreamPointers = 0;
							mTouchEventStreamIsTainted = false;
							break;
						}

						case android.view.MotionEvent.ACTION_OUTSIDE:
						{
							if (mTouchEventStreamPointers != 0)
							{
								problem("ACTION_OUTSIDE but pointers are still down.");
							}
							ensureHistorySizeIsZeroForThisAction(@event);
							ensurePointerCountIsOneForThisAction(@event);
							mTouchEventStreamIsTainted = false;
							break;
						}

						default:
						{
							int actionMasked = @event.getActionMasked();
							int actionIndex = @event.getActionIndex();
							if (actionMasked == android.view.MotionEvent.ACTION_POINTER_DOWN)
							{
								if (mTouchEventStreamPointers == 0)
								{
									problem("ACTION_POINTER_DOWN but no other pointers were down.");
									mTouchEventStreamIsTainted = true;
								}
								if (actionIndex < 0 || actionIndex >= pointerCount)
								{
									problem("ACTION_POINTER_DOWN index is " + actionIndex + " but the pointer count is "
										 + pointerCount + ".");
									mTouchEventStreamIsTainted = true;
								}
								else
								{
									int id = @event.getPointerId(actionIndex);
									int idBit = 1 << id;
									if ((mTouchEventStreamPointers & idBit) != 0)
									{
										problem("ACTION_POINTER_DOWN specified pointer id " + id + " which is already down."
											);
										mTouchEventStreamIsTainted = true;
									}
									else
									{
										mTouchEventStreamPointers |= idBit;
									}
								}
								ensureHistorySizeIsZeroForThisAction(@event);
							}
							else

		public override bool dispatchTrackballEvent(android.view.MotionEvent @event)
		{
			int action = @event.getActionMasked();
			if (action == android.view.MotionEvent.ACTION_CANCEL || action == android.view.MotionEvent
				.ACTION_UP)
			{
				removeAllCallbacks();
			}
			return base.dispatchTrackballEvent(@event);
		}

		public override bool dispatchTouchEvent(android.view.MotionEvent @event)
		{
			int action = @event.getActionMasked();
			switch (action)
			{
				case android.view.MotionEvent.ACTION_MOVE:
				{
					if (mSelectorWheelState == SELECTOR_WHEEL_STATE_LARGE)
					{
						removeAllCallbacks();
						forceCompleteChangeCurrentByOneViaScroll();
					}
					break;
				}

				case android.view.MotionEvent.ACTION_CANCEL:
				case android.view.MotionEvent.ACTION_UP:
				{
					removeAllCallbacks();
					break;
				}
			}
			return base.dispatchTouchEvent(@event);
		}

		public override bool onTouchEvent(android.view.MotionEvent ev)
		{
			if (!isEnabled())
			{
				return false;
			}
			if (mVelocityTracker == null)
			{
				mVelocityTracker = android.view.VelocityTracker.obtain();
			}
			mVelocityTracker.addMovement(ev);
			int action = ev.getActionMasked();
			switch (action)
			{
				case android.view.MotionEvent.ACTION_MOVE:
				{
					float currentMoveY = ev.getY();
					if (mBeginEditOnUpEvent || mScrollState != android.widget.NumberPicker.OnScrollListenerClass.SCROLL_STATE_TOUCH_SCROLL)
					{
						int deltaDownY = (int)System.Math.Abs(currentMoveY - mLastDownEventY);
						if (deltaDownY > mTouchSlop)
						{
							mBeginEditOnUpEvent = false;
							onScrollStateChange(android.widget.NumberPicker.OnScrollListenerClass.SCROLL_STATE_TOUCH_SCROLL
								);
						}
					}
					int deltaMoveY = (int)(currentMoveY - mLastMotionEventY);
					scrollBy(0, deltaMoveY);
					invalidate();
					mLastMotionEventY = currentMoveY;
					break;
				}

				case android.view.MotionEvent.ACTION_UP:
				{
					if (mBeginEditOnUpEvent)
					{
						setSelectorWheelState(SELECTOR_WHEEL_STATE_SMALL);
						showInputControls(mShowInputControlsAnimimationDuration);
						mInputText.requestFocus();
						return true;
					}
					android.view.VelocityTracker velocityTracker = mVelocityTracker;
					velocityTracker.computeCurrentVelocity(1000, mMaximumFlingVelocity);
					int initialVelocity = (int)velocityTracker.getYVelocity();
					if (System.Math.Abs(initialVelocity) > mMinimumFlingVelocity)
					{
						fling(initialVelocity);
						onScrollStateChange(android.widget.NumberPicker.OnScrollListenerClass.SCROLL_STATE_FLING
							);
					}
					else
					{
						if (mAdjustScrollerOnUpEvent)
						{
							if (mFlingScroller.isFinished() && mAdjustScroller.isFinished())
							{
								postAdjustScrollerCommand(0);
							}
						}
						else
						{
							postAdjustScrollerCommand(SHOW_INPUT_CONTROLS_DELAY_MILLIS);
						}
					}
					mVelocityTracker.recycle();
					mVelocityTracker = null;
					break;
				}
			}
			return true;
		}

		public override bool onInterceptTouchEvent(android.view.MotionEvent @event)
		{
			if (!isEnabled() || !mFlingable)
			{
				return false;
			}
			switch (@event.getActionMasked())
			{
				case android.view.MotionEvent.ACTION_DOWN:
				{
					mLastMotionEventY = mLastDownEventY = @event.getY();
					removeAllCallbacks();
					mShowInputControlsAnimator.cancel();
					mDimSelectorWheelAnimator.cancel();
					mBeginEditOnUpEvent = false;
					mAdjustScrollerOnUpEvent = true;
					if (mSelectorWheelState == SELECTOR_WHEEL_STATE_LARGE)
					{
						bool scrollersFinished = mFlingScroller.isFinished() && mAdjustScroller.isFinished
							();
						if (!scrollersFinished)
						{
							mFlingScroller.forceFinished(true);
							mAdjustScroller.forceFinished(true);
							onScrollStateChange(android.widget.NumberPicker.OnScrollListenerClass.SCROLL_STATE_IDLE
								);
						}
						mBeginEditOnUpEvent = scrollersFinished;
						mAdjustScrollerOnUpEvent = true;
						hideInputControls();
						return true;
					}
					if (isEventInViewHitRect(@event, mInputText) || (!mIncrementButton.isShown() && isEventInViewHitRect
						(@event, mIncrementButton)) || (!mDecrementButton.isShown() && isEventInViewHitRect
						(@event, mDecrementButton)))
					{
						mAdjustScrollerOnUpEvent = false;
						setSelectorWheelState(SELECTOR_WHEEL_STATE_LARGE);
						hideInputControls();
						return true;
					}
					break;
				}

				case android.view.MotionEvent.ACTION_MOVE:
				{
					float currentMoveY = @event.getY();
					int deltaDownY = (int)System.Math.Abs(currentMoveY - mLastDownEventY);
					if (deltaDownY > mTouchSlop)
					{
						mBeginEditOnUpEvent = false;
						onScrollStateChange(android.widget.NumberPicker.OnScrollListenerClass.SCROLL_STATE_TOUCH_SCROLL
							);
						setSelectorWheelState(SELECTOR_WHEEL_STATE_LARGE);
						hideInputControls();
						return true;
					}
					break;
				}
			}
			return false;
		}

		internal virtual bool onInterceptTouchEvent(android.view.MotionEvent ev)
		{
			switch (ev.getActionMasked())
			{
				case android.view.MotionEvent.ACTION_DOWN:
				{
					if (mState > STATE_NONE && isPointInside(ev.getX(), ev.getY()))
					{
						if (!mList.isInScrollingContainer())
						{
							beginDrag();
							return true;
						}
						mInitialTouchY = ev.getY();
						startPendingDrag();
					}
					break;
				}

				case android.view.MotionEvent.ACTION_UP:
				case android.view.MotionEvent.ACTION_CANCEL:
				{
					cancelPendingDrag();
					break;
				}
			}
			return false;
		}