Example usage for android.view MotionEvent ACTION_POINTER

Introduction

In this page you can find the example usage for android.view MotionEvent ACTION_POINTER_DOWN.

Prototype

int ACTION_POINTER_DOWN

To view the source code for android.view MotionEvent ACTION_POINTER_DOWN.

Click Source Link

Document

Constant for #getActionMasked : A non-primary pointer has gone down.

Usage

From source file:org.telegram.ui.Components.ChatAttachAlert.java

private boolean processTouchEvent(MotionEvent event) {
    if (!pressed && event.getActionMasked() == MotionEvent.ACTION_DOWN
            || event.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN) {
        if (!takingPhoto) {
            pressed = true;//www  . j av  a  2s .c  om
            maybeStartDraging = true;
            lastY = event.getY();
        }
    } else if (pressed) {
        if (event.getActionMasked() == MotionEvent.ACTION_MOVE) {
            float newY = event.getY();
            float dy = (newY - lastY);
            if (maybeStartDraging) {
                if (Math.abs(dy) > AndroidUtilities.getPixelsInCM(0.4f, false)) {
                    maybeStartDraging = false;
                }
            } else {
                cameraView.setTranslationY(cameraView.getTranslationY() + dy);
                lastY = newY;
                if (cameraPanel.getTag() == null) {
                    cameraPanel.setTag(1);
                    AnimatorSet animatorSet = new AnimatorSet();
                    animatorSet.playTogether(ObjectAnimator.ofFloat(cameraPanel, "alpha", 0.0f),
                            ObjectAnimator.ofFloat(flashModeButton[0], "alpha", 0.0f),
                            ObjectAnimator.ofFloat(flashModeButton[1], "alpha", 0.0f));
                    animatorSet.setDuration(200);
                    animatorSet.start();
                }
            }
        } else if (event.getActionMasked() == MotionEvent.ACTION_CANCEL
                || event.getActionMasked() == MotionEvent.ACTION_UP
                || event.getActionMasked() == MotionEvent.ACTION_POINTER_UP) {
            pressed = false;
            if (Math.abs(cameraView.getTranslationY()) > cameraView.getMeasuredHeight() / 6.0f) {
                closeCamera(true);
            } else {
                AnimatorSet animatorSet = new AnimatorSet();
                animatorSet.playTogether(ObjectAnimator.ofFloat(cameraView, "translationY", 0.0f),
                        ObjectAnimator.ofFloat(cameraPanel, "alpha", 1.0f),
                        ObjectAnimator.ofFloat(flashModeButton[0], "alpha", 1.0f),
                        ObjectAnimator.ofFloat(flashModeButton[1], "alpha", 1.0f));
                animatorSet.setDuration(250);
                animatorSet.setInterpolator(interpolator);
                animatorSet.start();
                cameraPanel.setTag(null);
            }
        }
    }
    return true;
}

From source file:com.vuze.android.remote.fragment.TorrentListFragment.java

public void onTouchEvent(MotionEvent event) {
    if (sideListArea == null) {
        return;//from w ww  .j av a  2 s  .  c  om
    }
    int action = event.getAction() & 0xff;
    if (action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_POINTER_DOWN) {
        return;
    }
    boolean newHasFocus = isViewContains(sideListArea, (int) event.getX(), (int) event.getY());
    if ((sidelistIsExpanded == null || sidelistIsExpanded) && !newHasFocus) {
        //left focus
        sidelistInFocus = false;
        expandSideListWidth(false);
        // uncomment this if you want the sidelist to expand upon touch of
        // sidelist area
        //      } else if ((sidelistIsExpanded == null || !sidelistIsExpanded)
        //            && newHasFocus) {
        //         expandSideListWidth(true);
        //         sidelistInFocus = true;
    }
}

From source file:com.android.internal.widget.ViewPager.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (ev.getAction() == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) {
        // Don't handle edge touches immediately -- they may actually belong to one of our
        // descendants.
        return false;
    }/*from www  .  java  2  s .com*/

    if (mAdapter == null || mAdapter.getCount() == 0) {
        // Nothing to present or scroll; nothing to touch.
        return false;
    }

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    mVelocityTracker.addMovement(ev);

    final int action = ev.getAction();
    boolean needsInvalidate = false;

    switch (action & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN: {
        mScroller.abortAnimation();
        mPopulatePending = false;
        populate();

        // Remember where the motion event started
        mLastMotionX = mInitialMotionX = ev.getX();
        mLastMotionY = mInitialMotionY = ev.getY();
        mActivePointerId = ev.getPointerId(0);
        break;
    }
    case MotionEvent.ACTION_MOVE:
        if (!mIsBeingDragged) {
            final int pointerIndex = ev.findPointerIndex(mActivePointerId);
            final float x = ev.getX(pointerIndex);
            final float xDiff = Math.abs(x - mLastMotionX);
            final float y = ev.getY(pointerIndex);
            final float yDiff = Math.abs(y - mLastMotionY);
            if (DEBUG)
                Log.v(TAG, "Moved x to " + x + "," + y + " diff=" + xDiff + "," + yDiff);
            if (xDiff > mTouchSlop && xDiff > yDiff) {
                if (DEBUG)
                    Log.v(TAG, "Starting drag!");
                mIsBeingDragged = true;
                requestParentDisallowInterceptTouchEvent(true);
                mLastMotionX = x - mInitialMotionX > 0 ? mInitialMotionX + mTouchSlop
                        : mInitialMotionX - mTouchSlop;
                mLastMotionY = y;
                setScrollState(SCROLL_STATE_DRAGGING);
                setScrollingCacheEnabled(true);

                // Disallow Parent Intercept, just in case
                ViewParent parent = getParent();
                if (parent != null) {
                    parent.requestDisallowInterceptTouchEvent(true);
                }
            }
        }
        // Not else! Note that mIsBeingDragged can be set above.
        if (mIsBeingDragged) {
            // Scroll to follow the motion event
            final int activePointerIndex = ev.findPointerIndex(mActivePointerId);
            final float x = ev.getX(activePointerIndex);
            needsInvalidate |= performDrag(x);
        }
        break;
    case MotionEvent.ACTION_UP:
        if (mIsBeingDragged) {
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            final int initialVelocity = (int) velocityTracker.getXVelocity(mActivePointerId);

            mPopulatePending = true;

            final float scrollStart = getScrollStart();
            final float scrolledPages = scrollStart / getPaddedWidth();
            final ItemInfo ii = infoForFirstVisiblePage();
            final int currentPage = ii.position;
            final float nextPageOffset;
            if (isLayoutRtl()) {
                nextPageOffset = (ii.offset - scrolledPages) / ii.widthFactor;
            } else {
                nextPageOffset = (scrolledPages - ii.offset) / ii.widthFactor;
            }

            final int activePointerIndex = ev.findPointerIndex(mActivePointerId);
            final float x = ev.getX(activePointerIndex);
            final int totalDelta = (int) (x - mInitialMotionX);
            final int nextPage = determineTargetPage(currentPage, nextPageOffset, initialVelocity, totalDelta);
            setCurrentItemInternal(nextPage, true, true, initialVelocity);

            mActivePointerId = INVALID_POINTER;
            endDrag();
            mLeftEdge.onRelease();
            mRightEdge.onRelease();
            needsInvalidate = true;
        }
        break;
    case MotionEvent.ACTION_CANCEL:
        if (mIsBeingDragged) {
            scrollToItem(mCurItem, true, 0, false);
            mActivePointerId = INVALID_POINTER;
            endDrag();
            mLeftEdge.onRelease();
            mRightEdge.onRelease();
            needsInvalidate = true;
        }
        break;
    case MotionEvent.ACTION_POINTER_DOWN: {
        final int index = ev.getActionIndex();
        final float x = ev.getX(index);
        mLastMotionX = x;
        mActivePointerId = ev.getPointerId(index);
        break;
    }
    case MotionEvent.ACTION_POINTER_UP:
        onSecondaryPointerUp(ev);
        mLastMotionX = ev.getX(ev.findPointerIndex(mActivePointerId));
        break;
    }
    if (needsInvalidate) {
        postInvalidateOnAnimation();
    }
    return true;
}

From source file:processing.core.PApplet.java

/**
 * Take action based on a motion event. Internally updates mouseX, mouseY,
 * mousePressed, and mouseEvent. Then it calls the event type with no
 * params, i.e. mousePressed() or mouseReleased() that the user may have
 * overloaded to do something more useful.
 *///from ww w  .j a  va  2  s . c  o  m
protected void handleMotionEvent(PMotionEvent pme) {
    pmotionX = emotionX;
    pmotionY = emotionY;
    motionX = pme.motionX[0];
    motionY = pme.motionY[0];
    motionPressure = pme.motionPressure[0];

    // replace previous mouseX/Y with the last from the event handlers
    pmouseX = emouseX;
    pmouseY = emouseY;
    mouseX = pme.mouseX[0];
    mouseY = pme.mouseY[0];

    // this used to only be called on mouseMoved and mouseDragged
    // change it back if people run into trouble
    if (firstMotion) {
        pmouseX = mouseX;
        pmouseY = mouseY;
        dmouseX = mouseX; // set it as the first value to be used inside
                          // draw() too
        dmouseY = mouseY;

        pmotionX = motionX;
        pmotionY = motionY;
        dmotionX = motionX;
        dmotionY = motionY;

        firstMotion = false;
    }

    if (ppointersX.length < numPointers) {
        ppointersX = new float[numPointers];
        ppointersY = new float[numPointers];
        ppointersPressure = new float[numPointers];
    }
    arrayCopy(pointersX, ppointersX);
    arrayCopy(pointersY, ppointersY);
    arrayCopy(pointersPressure, ppointersPressure);

    numPointers = pme.numPointers;
    if (pointersX.length < numPointers) {
        pointersX = new float[numPointers];
        pointersY = new float[numPointers];
        pointersPressure = new float[numPointers];
    }
    arrayCopy(pme.motionX, pointersX);
    arrayCopy(pme.motionY, pointersY);
    arrayCopy(pme.motionPressure, pointersPressure);

    // Triggering the appropriate event methods
    if (pme.action == MotionEvent.ACTION_DOWN || (!mousePressed && numPointers == 1)) {
        // First pointer is down
        mousePressed = true;
        onePointerGesture = true;
        twoPointerGesture = false;
        downMillis = millis();
        downX = pointersX[0];
        downY = pointersY[0];

        mousePressed();
        pressEvent();

    } else if ((pme.action == MotionEvent.ACTION_POINTER_DOWN && numPointers == 2)
            || (pme.action == MotionEvent.ACTION_POINTER_2_DOWN) || // 2.3
            // seems
            // to
            // use
            // this
            // action
            // constant
            // (supposedly
            // deprecated)
            // instead
            // of
            // ACTION_POINTER_DOWN
            (pnumPointers == 1 && numPointers == 2)) { // 2.1 just uses MOVE
        // as the action
        // constant, so the
        // only way to know
        // we have a new
        // pointer is to
        // compare the
        // counters.

        // An additional pointer is down (we keep track of multitouch only
        // for 2 pointers)
        onePointerGesture = false;
        twoPointerGesture = true;

    } else if ((pme.action == MotionEvent.ACTION_POINTER_UP && numPointers == 2)
            || (pme.action == MotionEvent.ACTION_POINTER_2_UP) || // 2.1
            // doesn't
            // use
            // the
            // ACTION_POINTER_UP
            // constant,
            // but
            // this
            // one,
            // apparently
            // deprecated
            // in
            // newer
            // versions
            // of
            // the
            // SDK.
            (twoPointerGesture && numPointers < 2)) { // Sometimes it seems
        // that it doesn't
        // generate the up
        // event.
        // A previously detected pointer is up

        twoPointerGesture = false; // Not doing a 2-pointer gesture anymore,
        // but neither a 1-pointer.

    } else if (pme.action == MotionEvent.ACTION_MOVE) {
        // Pointer motion

        if (onePointerGesture) {
            if (mousePressed) {
                mouseDragged();
                dragEvent();
            } else {
                mouseMoved();
                moveEvent();
            }
        } else if (twoPointerGesture) {
            float d0 = PApplet.dist(ppointersX[0], ppointersY[0], ppointersX[1], ppointersY[1]);
            float d1 = PApplet.dist(pointersX[0], pointersY[0], pointersX[1], pointersY[1]);

            if (0 < d0 && 0 < d1) {
                float centerX = 0.5f * (pointersX[0] + pointersX[1]);
                float centerY = 0.5f * (pointersY[0] + pointersY[1]);

                zoomEvent(centerX, centerY, d0, d1);
            }
        }

    } else if (pme.action == MotionEvent.ACTION_UP) {
        // Final pointer is up
        mousePressed = false;
        mouseReleased();

        float upX = pointersX[0];
        float upY = pointersY[0];
        float gestureLength = PApplet.dist(downX, downY, upX, upY);

        int upMillis = millis();
        int gestureTime = upMillis - downMillis;

        if (onePointerGesture) {

            // First, lets determine if this 1-pointer event is a tap
            boolean tap = gestureLength <= MAX_TAP_DISP && gestureTime <= MAX_TAP_DURATION;
            if (tap) {
                mouseClicked();
                tapEvent(downX, downY);
            } else if (MIN_SWIPE_LENGTH <= gestureLength && gestureTime <= MAX_SWIPE_DURATION) {
                swipeEvent(downX, downY, upX, upY);
            } else {
                mouseReleased();
                releaseEvent();
            }

        } else {
            mouseReleased();
            releaseEvent();
        }

        onePointerGesture = twoPointerGesture = false;
    } else if (pme.action == MotionEvent.ACTION_CANCEL) {
        // Current gesture is canceled.
        onePointerGesture = twoPointerGesture = false;
        mousePressed = false;

        mouseReleased();
        releaseEvent();
    } else {
        // System.out.println("Unknown MotionEvent action: " + action);
    }

    pnumPointers = numPointers;

    if (pme.action == MotionEvent.ACTION_MOVE) {
        emotionX = motionX;
        emotionY = motionY;
        emouseX = mouseX;
        emouseY = mouseY;
    }
}

From source file:de.tum.in.tumcampus.auxiliary.calendar.DayView.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    int action = ev.getAction();

    if ((ev.getActionMasked() == MotionEvent.ACTION_DOWN) || (ev.getActionMasked() == MotionEvent.ACTION_UP)
            || (ev.getActionMasked() == MotionEvent.ACTION_POINTER_UP)
            || (ev.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN)) {
        mRecalCenterHour = true;// w ww.j a v a  2 s  . co  m
    }

    if ((mTouchMode & TOUCH_MODE_HSCROLL) == 0) {
        mScaleGestureDetector.onTouchEvent(ev);
    }

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mStartingScroll = true;

        mHandleActionUp = true;
        mGestureDetector.onTouchEvent(ev);
        return true;

    case MotionEvent.ACTION_MOVE:
        mGestureDetector.onTouchEvent(ev);
        return true;

    case MotionEvent.ACTION_UP:
        mEdgeEffectTop.onRelease();
        mEdgeEffectBottom.onRelease();
        mStartingScroll = false;
        mGestureDetector.onTouchEvent(ev);
        if (!mHandleActionUp) {
            mHandleActionUp = true;
            mViewStartX = 0;
            invalidate();
            return true;
        }

        if (mOnFlingCalled) {
            return true;
        }

        // If we were scrolling, then reset the selected hour so that it is visible.
        if (mScrolling) {
            mScrolling = false;
            resetSelectedHour();
            invalidate();
        }

        if ((mTouchMode & TOUCH_MODE_HSCROLL) != 0) {
            mTouchMode = TOUCH_MODE_INITIAL_STATE;
            if (Math.abs(mViewStartX) > mHorizontalSnapBackThreshold) {
                // The user has gone beyond the threshold so switch views
                switchViews(mViewStartX > 0, mViewStartX, mViewWidth, 0);
                mViewStartX = 0;
                return true;
            } else {
                // Not beyond the threshold so invalidate which will cause
                // the view to snap back. Also call recalc() to ensure
                // that we have the correct starting date and title.
                recalc();
                invalidate();
                mViewStartX = 0;
            }
        }

        return true;

    // This case isn't expected to happen.
    case MotionEvent.ACTION_CANCEL:
        mGestureDetector.onTouchEvent(ev);
        mScrolling = false;
        resetSelectedHour();
        return true;

    default:
        if (mGestureDetector.onTouchEvent(ev)) {
            return true;
        }
        return super.onTouchEvent(ev);
    }
}

From source file:com.glview.widget.AbsListView.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (!isEnabled()) {
        // A disabled view that is clickable still consumes the touch
        // events, it just doesn't respond to them.
        return isClickable() || isLongClickable();
    }//  w ww.ja va2s . c o  m

    if (mPositionScroller != null) {
        mPositionScroller.stop();
    }

    if (mIsDetaching || !isAttachedToWindow()) {
        // Something isn't right.
        // Since we rely on being attached to get data set change notifications,
        // don't risk doing anything where we might try to resync and find things
        // in a bogus state.
        return false;
    }

    startNestedScroll(SCROLL_AXIS_VERTICAL);

    if (mFastScroll != null) {
        boolean intercepted = mFastScroll.onTouchEvent(ev);
        if (intercepted) {
            return true;
        }
    }

    initVelocityTrackerIfNotExists();
    final MotionEvent vtev = MotionEvent.obtain(ev);

    final int actionMasked = ev.getActionMasked();
    if (actionMasked == MotionEvent.ACTION_DOWN) {
        mNestedYOffset = 0;
    }
    vtev.offsetLocation(0, mNestedYOffset);
    switch (actionMasked) {
    case MotionEvent.ACTION_DOWN: {
        onTouchDown(ev);
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        onTouchMove(ev, vtev);
        break;
    }

    case MotionEvent.ACTION_UP: {
        onTouchUp(ev);
        break;
    }

    case MotionEvent.ACTION_CANCEL: {
        onTouchCancel();
        break;
    }

    case MotionEvent.ACTION_POINTER_UP: {
        onSecondaryPointerUp(ev);
        final int x = mMotionX;
        final int y = mMotionY;
        final int motionPosition = pointToPosition(x, y);
        if (motionPosition >= 0) {
            // Remember where the motion event started
            final View child = getChildAt(motionPosition - mFirstPosition);
            mMotionViewOriginalTop = child.getTop();
            mMotionPosition = motionPosition;
        }
        mLastY = y;
        break;
    }

    case MotionEvent.ACTION_POINTER_DOWN: {
        // New pointers take over dragging duties
        final int index = ev.getActionIndex();
        final int id = ev.getPointerId(index);
        final int x = (int) ev.getX(index);
        final int y = (int) ev.getY(index);
        mMotionCorrection = 0;
        mActivePointerId = id;
        mMotionX = x;
        mMotionY = y;
        final int motionPosition = pointToPosition(x, y);
        if (motionPosition >= 0) {
            // Remember where the motion event started
            final View child = getChildAt(motionPosition - mFirstPosition);
            mMotionViewOriginalTop = child.getTop();
            mMotionPosition = motionPosition;
        }
        mLastY = y;
        break;
    }
    }

    if (mVelocityTracker != null) {
        mVelocityTracker.addMovement(vtev);
    }
    vtev.recycle();
    return true;
}

From source file:com.wb.launcher3.Page.java

public boolean handleMotionEvent(MotionEvent ev) {
    if (getChildCount() <= 0) {
        return false;
    }/*from w  w  w  .  j  ava2  s .  co  m*/
    acquireVelocityTrackerAndAddMovement(ev);
    switch (MotionEvent.ACTION_MASK & ev.getAction()) {
    case MotionEvent.ACTION_POINTER_DOWN:
        if (ev.getPointerCount() <= 2) {
            if (!this.mScroller.isFinished()) {
                this.mScroller.abortAnimation();
            }
            int index = (ev.getAction()
                    & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
            float px = ev.getX(index);
            mLastMotionX = px;
            mDownMotionX = px;
            mLastMotionY = ev.getY(index);
            mLastMotionXRemainder = 0.0F;
            mTotalMotionX = 0.0F;
            mActivePointerId = ev.getPointerId(index);
            mTouchState = TOUCH_STATE_SCROLLING;
            pageBeginMoving();
        }
        break;
    case MotionEvent.ACTION_MOVE:
        if (mTouchState == TOUCH_STATE_SCROLLING) {
            int pointerIndex = ev.findPointerIndex(mActivePointerId);
            if (pointerIndex >= 0) {
                float x = ev.getX(pointerIndex);
                float deltaX = mLastMotionX + mLastMotionXRemainder - x;
                mTotalMotionX += Math.abs(deltaX);
                if (Math.abs(deltaX) >= 1.0F) {
                    mTouchX += deltaX;
                    mSmoothingTime = System.nanoTime() / NANOTIME_DIV;
                    if (!mDeferScrollUpdate) {
                        scrollBy((int) deltaX, 0);
                        if (DEBUG)
                            Log.d(TAG, "handleMotionEvent().Scrolling: " + deltaX);
                    } else {
                        invalidate();
                    }
                    mLastMotionX = x;
                    mLastMotionXRemainder = deltaX - (int) deltaX;
                } else {
                    awakenScrollBars();
                }
            }
        } else {
            determineScrollingStart(ev);
        }
        break;

    case MotionEvent.ACTION_POINTER_UP:
        if (ev.getPointerCount() > 2) {
            onOtherPointerUp(ev);
            break;
        }

        if (mTouchState == TOUCH_STATE_SCROLLING) {
            final int activePointerId = mActivePointerId;
            final int pointerIndex = ev.findPointerIndex(activePointerId);
            final float x = ev.getX(pointerIndex);
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            int velocityX = (int) velocityTracker.getXVelocity(activePointerId);
            final int deltaX = (int) (x - mDownMotionX);
            final int pageWidth = getPageAt(mCurrentPage).getMeasuredWidth();
            boolean isSignificantMove = Math.abs(deltaX) > pageWidth * SIGNIFICANT_MOVE_THRESHOLD;

            mTotalMotionX += Math.abs(mLastMotionX + mLastMotionXRemainder - x);

            boolean isFling = mTotalMotionX > MIN_LENGTH_FOR_FLING
                    && Math.abs(velocityX) > mFlingThresholdVelocity;
            boolean returnToOriginalPage = false;
            if (Math.abs(deltaX) > pageWidth * RETURN_TO_ORIGINAL_PAGE_THRESHOLD
                    && Math.signum(velocityX) != Math.signum(deltaX) && isFling) {
                returnToOriginalPage = true;
            }

            if (TydtechConfig.CYCLE_ROLL_PAGES_ENABLED) {
                m_moveNextDeltaX = deltaX;
                m_isSignificantMoveNext = (!returnToOriginalPage && (isSignificantMove || isFling));
            }

            int finalPage;
            if (((isSignificantMove && deltaX > 0 && !isFling) || (isFling && velocityX > 0))
                    && mCurrentPage > 0) {
                finalPage = returnToOriginalPage ? mCurrentPage : mCurrentPage - 1;
                snapToPageWithVelocity(finalPage, velocityX);
            } else if (((isSignificantMove && deltaX < 0 && !isFling) || (isFling && velocityX < 0))
                    && mCurrentPage < getChildCount() - 1) {
                finalPage = returnToOriginalPage ? mCurrentPage : mCurrentPage + 1;
                snapToPageWithVelocity(finalPage, velocityX);
            } else {
                snapToDestination();
            }
        } else if (mTouchState == TOUCH_STATE_PREV_PAGE) {
            int nextPage = Math.max(0, mCurrentPage - 1);
            if (nextPage != mCurrentPage) {
                snapToPage(nextPage);
            } else {
                snapToDestination();
            }
        } else if (mTouchState == TOUCH_STATE_NEXT_PAGE) {
            int nextPage = Math.min(getChildCount() - 1, mCurrentPage + 1);
            if (nextPage != mCurrentPage) {
                snapToPage(nextPage);
            } else {
                snapToDestination();
            }
        } else {
            snapToDestination();
            onUnhandledTap(ev);
        }
        mTouchState = TOUCH_STATE_REST;
        mActivePointerId = INVALID_POINTER;
        releaseVelocityTracker();
        break;

    case MotionEvent.ACTION_CANCEL:
        if (mTouchState == TOUCH_STATE_SCROLLING) {
            snapToDestination();
        }
        mTouchState = TOUCH_STATE_REST;
        mActivePointerId = INVALID_POINTER;
        releaseVelocityTracker();
        break;
    }

    return true;
}

From source file:com.example.libwidgettv.bak.AbsListView.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (!isEnabled()) {
        // A disabled view that is clickable still consumes the touch
        // events, it just doesn't respond to them.
        return isClickable() || isLongClickable();
    }//www  . ja  va  2s.c om

    if (mFastScroller != null) {
        boolean intercepted = mFastScroller.onTouchEvent(ev);
        if (intercepted) {
            return true;
        }
    }

    final int action = ev.getAction();

    View v;

    initVelocityTrackerIfNotExists();
    mVelocityTracker.addMovement(ev);

    switch (action & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN: {
        switch (mTouchMode) {
        case TOUCH_MODE_OVERFLING: {
            mFlingRunnable.endFling();
            if (mPositionScroller != null) {
                mPositionScroller.stop();
            }
            mTouchMode = TOUCH_MODE_OVERSCROLL;
            mMotionX = (int) ev.getX();
            mMotionY = mLastY = (int) ev.getY();
            mMotionCorrection = 0;
            mActivePointerId = ev.getPointerId(0);
            mDirection = 0;
            break;
        }

        default: {
            mActivePointerId = ev.getPointerId(0);
            final int x = (int) ev.getX();
            final int y = (int) ev.getY();
            int motionPosition = pointToPosition(x, y);
            if (!mDataChanged) {
                if ((mTouchMode != TOUCH_MODE_FLING) && (motionPosition >= 0)
                        && (getAdapter().isEnabled(motionPosition))) {
                    // User clicked on an actual view (and was not stopping
                    // a fling).
                    // It might be a click or a scroll. Assume it is a click
                    // until
                    // proven otherwise
                    mTouchMode = TOUCH_MODE_DOWN;
                    // FIXME Debounce
                    if (mPendingCheckForTap == null) {
                        mPendingCheckForTap = new CheckForTap();
                    }
                    postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
                } else {
                    if (mTouchMode == TOUCH_MODE_FLING) {
                        // Stopped a fling. It is a scroll.
                        createScrollingCache();
                        mTouchMode = TOUCH_MODE_SCROLL;
                        mMotionCorrection = 0;
                        motionPosition = findMotionRow(y);
                        mFlingRunnable.flywheelTouch();
                    }
                }
            }

            if (motionPosition >= 0) {
                // Remember where the motion event started
                v = getChildAt(motionPosition - mFirstPosition);
                mMotionViewOriginalTop = v.getTop();
            }
            mMotionX = x;
            mMotionY = y;
            mMotionPosition = motionPosition;
            mLastY = Integer.MIN_VALUE;
            break;
        }
        }

        // if (performButtonActionOnTouchDown(ev)) {
        // if (mTouchMode == TOUCH_MODE_DOWN) {
        // removeCallbacks(mPendingCheckForTap);
        // }
        // }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        int pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex == -1) {
            pointerIndex = 0;
            mActivePointerId = ev.getPointerId(pointerIndex);
        }
        final int y = (int) ev.getY(pointerIndex);
        switch (mTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            // Check if we have moved far enough that it looks more like a
            // scroll than a tap
            startScrollIfNeeded(y);
            break;
        case TOUCH_MODE_SCROLL:
        case TOUCH_MODE_OVERSCROLL:
            scrollIfNeeded(y);
            break;
        }
        break;
    }

    case MotionEvent.ACTION_UP: {
        switch (mTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            final int motionPosition = mMotionPosition;
            final View child = getChildAt(motionPosition - mFirstPosition);

            final float x = ev.getX();
            final boolean inList = x > mListPadding.left && x < getWidth() - mListPadding.right;

            if (child != null && !child.hasFocusable() && inList) {
                if (mTouchMode != TOUCH_MODE_DOWN) {
                    child.setPressed(false);
                }

                if (mPerformClick == null) {
                    mPerformClick = new PerformClick();
                }

                final AbsListView.PerformClick performClick = mPerformClick;
                performClick.mClickMotionPosition = motionPosition;
                performClick.rememberWindowAttachCount();

                mResurrectToPosition = motionPosition;

                if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
                    final Handler handler = getHandler();
                    if (handler != null) {
                        handler.removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ? mPendingCheckForTap
                                : mPendingCheckForLongPress);
                    }
                    mLayoutMode = LAYOUT_NORMAL;
                    if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                        mTouchMode = TOUCH_MODE_TAP;
                        setSelectedPositionInt(mMotionPosition);
                        layoutChildren();
                        child.setPressed(true);
                        positionSelector(mMotionPosition, child);
                        setPressed(true);
                        if (mSelector != null) {
                            Drawable d = mSelector.getCurrent();
                            if (d != null && d instanceof TransitionDrawable) {
                                ((TransitionDrawable) d).resetTransition();
                            }
                        }
                        if (mTouchModeReset != null) {
                            removeCallbacks(mTouchModeReset);
                        }
                        mTouchModeReset = new Runnable() {
                            @Override
                            public void run() {
                                mTouchMode = TOUCH_MODE_REST;
                                child.setPressed(false);
                                setPressed(false);
                                if (!mDataChanged) {
                                    performClick.run();
                                }
                            }
                        };
                        postDelayed(mTouchModeReset, ViewConfiguration.getPressedStateDuration());
                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                        updateSelectorState();
                    }
                    return true;
                } else if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                    performClick.run();
                }
            }
            mTouchMode = TOUCH_MODE_REST;
            updateSelectorState();
            break;
        case TOUCH_MODE_SCROLL:
            final int childCount = getChildCount();
            if (childCount > 0) {
                final int firstChildTop = getChildAt(0).getTop();
                final int lastChildBottom = getChildAt(childCount - 1).getBottom();
                final int contentTop = mListPadding.top;
                final int contentBottom = getHeight() - mListPadding.bottom;
                if (mFirstPosition == 0 && firstChildTop >= contentTop
                        && mFirstPosition + childCount < mItemCount
                        && lastChildBottom <= getHeight() - contentBottom) {
                    mTouchMode = TOUCH_MODE_REST;
                    reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                } else {
                    final VelocityTracker velocityTracker = mVelocityTracker;
                    velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);

                    final int initialVelocity = (int) (velocityTracker.getYVelocity(mActivePointerId)
                            * mVelocityScale);
                    // Fling if we have enough velocity and we aren't at a
                    // boundary.
                    // Since we can potentially overfling more than we can
                    // overscroll, don't
                    // allow the weird behavior where you can scroll to a
                    // boundary then
                    // fling further.
                    if (Math.abs(initialVelocity) > mMinimumVelocity
                            && !((mFirstPosition == 0 && firstChildTop == contentTop - mOverscrollDistance)
                                    || (mFirstPosition + childCount == mItemCount
                                            && lastChildBottom == contentBottom + mOverscrollDistance))) {
                        if (mFlingRunnable == null) {
                            mFlingRunnable = new FlingRunnable();
                        }
                        reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);

                        mFlingRunnable.start(-initialVelocity);
                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                        reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                        if (mFlingRunnable != null) {
                            mFlingRunnable.endFling();
                        }
                        if (mPositionScroller != null) {
                            mPositionScroller.stop();
                        }
                    }
                }
            } else {
                mTouchMode = TOUCH_MODE_REST;
                reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
            }
            break;

        case TOUCH_MODE_OVERSCROLL:
            if (mFlingRunnable == null) {
                mFlingRunnable = new FlingRunnable();
            }
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            final int initialVelocity = (int) velocityTracker.getYVelocity(mActivePointerId);

            reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);
            if (Math.abs(initialVelocity) > mMinimumVelocity) {
                mFlingRunnable.startOverfling(-initialVelocity);
            } else {
                mFlingRunnable.startSpringback();
            }

            break;
        }

        setPressed(false);

        // Need to redraw since we probably aren't drawing the selector
        // anymore
        invalidate();

        final Handler handler = getHandler();
        if (handler != null) {
            handler.removeCallbacks(mPendingCheckForLongPress);
        }

        recycleVelocityTracker();

        mActivePointerId = INVALID_POINTER;

        if (PROFILE_SCROLLING) {
            if (mScrollProfilingStarted) {
                Debug.stopMethodTracing();
                mScrollProfilingStarted = false;
            }
        }
        break;
    }

    case MotionEvent.ACTION_CANCEL: {
        switch (mTouchMode) {
        case TOUCH_MODE_OVERSCROLL:
            if (mFlingRunnable == null) {
                mFlingRunnable = new FlingRunnable();
            }
            mFlingRunnable.startSpringback();
            break;

        case TOUCH_MODE_OVERFLING:
            // Do nothing - let it play out.
            break;

        default:
            mTouchMode = TOUCH_MODE_REST;
            setPressed(false);
            View motionView = this.getChildAt(mMotionPosition - mFirstPosition);
            if (motionView != null) {
                motionView.setPressed(false);
            }
            clearScrollingCache();

            final Handler handler = getHandler();
            if (handler != null) {
                handler.removeCallbacks(mPendingCheckForLongPress);
            }

            recycleVelocityTracker();
        }

        mActivePointerId = INVALID_POINTER;
        break;
    }

    case MotionEvent.ACTION_POINTER_UP: {
        onSecondaryPointerUp(ev);
        final int x = mMotionX;
        final int y = mMotionY;
        final int motionPosition = pointToPosition(x, y);
        if (motionPosition >= 0) {
            // Remember where the motion event started
            v = getChildAt(motionPosition - mFirstPosition);
            mMotionViewOriginalTop = v.getTop();
            mMotionPosition = motionPosition;
        }
        mLastY = y;
        break;
    }

    case MotionEvent.ACTION_POINTER_DOWN: {
        // New pointers take over dragging duties
        final int index = ev.getActionIndex();
        final int id = ev.getPointerId(index);
        final int x = (int) ev.getX(index);
        final int y = (int) ev.getY(index);
        mMotionCorrection = 0;
        mActivePointerId = id;
        mMotionX = x;
        mMotionY = y;
        final int motionPosition = pointToPosition(x, y);
        if (motionPosition >= 0) {
            // Remember where the motion event started
            v = getChildAt(motionPosition - mFirstPosition);
            mMotionViewOriginalTop = v.getTop();
            mMotionPosition = motionPosition;
        }
        mLastY = y;
        break;
    }
    }

    return true;
}

From source file:com.appunite.list.AbsHorizontalListView.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (!isEnabled()) {
        // A disabled view that is clickable still consumes the touch
        // events, it just doesn't respond to them.
        return isClickable() || isLongClickable();
    }/*  w w  w  .j  ava 2s  . co  m*/

    if (mPositionScroller != null) {
        mPositionScroller.stop();
    }

    if (!mIsAttached) {
        // Something isn't right.
        // Since we rely on being attached to get data set change notifications,
        // don't risk doing anything where we might try to resync and find things
        // in a bogus state.
        return false;
    }

    final int action = ev.getAction();

    View v;

    initVelocityTrackerIfNotExists();
    mVelocityTracker.addMovement(ev);

    switch (action & MotionEvent.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN: {
        switch (mTouchMode) {
        case TOUCH_MODE_OVERFLING: {
            mFlingRunnable.endFling();
            if (mPositionScroller != null) {
                mPositionScroller.stop();
            }
            mTouchMode = TOUCH_MODE_OVERSCROLL;
            mMotionX = mLastX = (int) ev.getX();
            mMotionY = (int) ev.getY();
            mMotionCorrection = 0;
            mActivePointerId = ev.getPointerId(0);
            mDirection = 0;
            break;
        }

        default: {
            mActivePointerId = ev.getPointerId(0);
            final int x = (int) ev.getX();
            final int y = (int) ev.getY();
            int motionPosition = pointToPosition(x, y);
            if (!mDataChanged) {
                if ((mTouchMode != TOUCH_MODE_FLING) && (motionPosition >= 0)
                        && (getAdapter().isEnabled(motionPosition))) {
                    // User clicked on an actual view (and was not stopping a fling).
                    // It might be a click or a scroll. Assume it is a click until
                    // proven otherwise
                    mTouchMode = TOUCH_MODE_DOWN;
                    // FIXME Debounce
                    if (mPendingCheckForTap == null) {
                        mPendingCheckForTap = new CheckForTap();
                    }
                    postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
                } else {
                    if (mTouchMode == TOUCH_MODE_FLING) {
                        // Stopped a fling. It is a scroll.
                        createScrollingCache();
                        mTouchMode = TOUCH_MODE_SCROLL;
                        mMotionCorrection = 0;
                        motionPosition = findMotionCol(x);
                        mFlingRunnable.flywheelTouch();
                    }
                }
            }

            if (motionPosition >= 0) {
                // Remember where the motion event started
                v = getChildAt(motionPosition - mFirstPosition);
                mMotionViewOriginalLeft = v.getLeft();
            }
            mMotionX = x;
            mMotionY = y;
            mMotionPosition = motionPosition;
            mLastX = Integer.MIN_VALUE;
            break;
        }
        }

        if (performButtonActionOnTouchDownUnhide(ev)) {
            if (mTouchMode == TOUCH_MODE_DOWN) {
                removeCallbacks(mPendingCheckForTap);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        int pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex == -1) {
            pointerIndex = 0;
            mActivePointerId = ev.getPointerId(pointerIndex);
        }
        final int x = (int) ev.getX(pointerIndex);

        if (mDataChanged) {
            // Re-sync everything if data has been changed
            // since the scroll operation can query the adapter.
            layoutChildren();
        }

        switch (mTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            // Check if we have moved far enough that it looks more like a
            // scroll than a tap
            startScrollIfNeeded(x);
            break;
        case TOUCH_MODE_SCROLL:
        case TOUCH_MODE_OVERSCROLL:
            scrollIfNeeded(x);
            break;
        }
        break;
    }

    case MotionEvent.ACTION_UP: {
        switch (mTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            final int motionPosition = mMotionPosition;
            final View child = getChildAt(motionPosition - mFirstPosition);

            final float y = ev.getY();
            final boolean inList = y > mListPadding.top && y < getHeight() - mListPadding.bottom;

            if (child != null && !child.hasFocusable() && inList) {
                if (mTouchMode != TOUCH_MODE_DOWN) {
                    child.setPressed(false);
                }

                if (mPerformClick == null) {
                    mPerformClick = new PerformClick();
                }

                final AbsHorizontalListView.PerformClick performClick = mPerformClick;
                performClick.mClickMotionPosition = motionPosition;
                performClick.rememberWindowAttachCount();

                mResurrectToPosition = motionPosition;

                if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
                    final Handler handler = getHandler();
                    if (handler != null) {
                        handler.removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ? mPendingCheckForTap
                                : mPendingCheckForLongPress);
                    }
                    mLayoutMode = LAYOUT_NORMAL;
                    if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                        mTouchMode = TOUCH_MODE_TAP;
                        setSelectedPositionInt(mMotionPosition);
                        layoutChildren();
                        child.setPressed(true);
                        positionSelector(mMotionPosition, child);
                        setPressed(true);
                        if (mSelector != null) {
                            Drawable d = mSelector.getCurrent();
                            if (d != null && d instanceof TransitionDrawable) {
                                ((TransitionDrawable) d).resetTransition();
                            }
                        }
                        if (mTouchModeReset != null) {
                            removeCallbacks(mTouchModeReset);
                        }
                        mTouchModeReset = new Runnable() {
                            @Override
                            public void run() {
                                mTouchModeReset = null;
                                mTouchMode = TOUCH_MODE_REST;
                                child.setPressed(false);
                                setPressed(false);
                                if (!mDataChanged) {
                                    performClick.run();
                                }
                            }
                        };
                        postDelayed(mTouchModeReset, ViewConfiguration.getPressedStateDuration());
                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                        updateSelectorState();
                    }
                    return true;
                } else if (!mDataChanged && mAdapter.isEnabled(motionPosition)) {
                    performClick.run();
                }
            }
            mTouchMode = TOUCH_MODE_REST;
            updateSelectorState();
            break;
        case TOUCH_MODE_SCROLL:
            final int childCount = getChildCount();
            if (childCount > 0) {
                final int firstChildLeft = getChildAt(0).getLeft();
                final int lastChildRight = getChildAt(childCount - 1).getRight();
                final int contentLeft = mListPadding.left;
                final int contentRight = getWidth() - mListPadding.right;
                if (mFirstPosition == 0 && firstChildLeft >= contentLeft
                        && mFirstPosition + childCount < mItemCount
                        && lastChildRight <= getWidth() - contentRight) {
                    mTouchMode = TOUCH_MODE_REST;
                    reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                } else {
                    final VelocityTracker velocityTracker = mVelocityTracker;
                    velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);

                    final int initialVelocity = (int) (velocityTracker.getXVelocity(mActivePointerId)
                            * mVelocityScale);
                    // Fling if we have enough velocity and we aren't at a boundary.
                    // Since we can potentially overfling more than we can overscroll, don't
                    // allow the weird behavior where you can scroll to a boundary then
                    // fling further.
                    if (Math.abs(initialVelocity) > mMinimumVelocity
                            && !((mFirstPosition == 0 && firstChildLeft == contentLeft - mOverscrollDistance)
                                    || (mFirstPosition + childCount == mItemCount
                                            && lastChildRight == contentRight + mOverscrollDistance))) {
                        if (mFlingRunnable == null) {
                            mFlingRunnable = new FlingRunnable();
                        }
                        reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);

                        mFlingRunnable.start(-initialVelocity);
                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                        reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
                        if (mFlingRunnable != null) {
                            mFlingRunnable.endFling();
                        }
                        if (mPositionScroller != null) {
                            mPositionScroller.stop();
                        }
                    }
                }
            } else {
                mTouchMode = TOUCH_MODE_REST;
                reportScrollStateChange(OnScrollListener.SCROLL_STATE_IDLE);
            }
            break;

        case TOUCH_MODE_OVERSCROLL:
            if (mFlingRunnable == null) {
                mFlingRunnable = new FlingRunnable();
            }
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            final int initialVelocity = (int) velocityTracker.getXVelocity(mActivePointerId);

            reportScrollStateChange(OnScrollListener.SCROLL_STATE_FLING);
            if (Math.abs(initialVelocity) > mMinimumVelocity) {
                mFlingRunnable.startOverfling(-initialVelocity);
            } else {
                mFlingRunnable.startSpringback();
            }

            break;
        }

        setPressed(false);

        if (mEdgeGlowLeft != null) {
            mEdgeGlowLeft.onRelease();
            mEdgeGlowRight.onRelease();
        }

        // Need to redraw since we probably aren't drawing the selector anymore
        invalidate();

        final Handler handler = getHandler();
        if (handler != null) {
            handler.removeCallbacks(mPendingCheckForLongPress);
        }

        recycleVelocityTracker();

        mActivePointerId = INVALID_POINTER;

        if (PROFILE_SCROLLING) {
            if (mScrollProfilingStarted) {
                Debug.stopMethodTracing();
                mScrollProfilingStarted = false;
            }
        }

        // FIXME not needed bacaues we could not implement strict span (j.m.)
        //            if (mScrollStrictSpan != null) {
        //                mScrollStrictSpan.finish();
        //                mScrollStrictSpan = null;
        //            }
        break;
    }

    case MotionEvent.ACTION_CANCEL: {
        switch (mTouchMode) {
        case TOUCH_MODE_OVERSCROLL:
            if (mFlingRunnable == null) {
                mFlingRunnable = new FlingRunnable();
            }
            mFlingRunnable.startSpringback();
            break;

        case TOUCH_MODE_OVERFLING:
            // Do nothing - let it play out.
            break;

        default:
            mTouchMode = TOUCH_MODE_REST;
            setPressed(false);
            View motionView = this.getChildAt(mMotionPosition - mFirstPosition);
            if (motionView != null) {
                motionView.setPressed(false);
            }
            clearScrollingCache();

            final Handler handler = getHandler();
            if (handler != null) {
                handler.removeCallbacks(mPendingCheckForLongPress);
            }

            recycleVelocityTracker();
        }

        if (mEdgeGlowLeft != null) {
            mEdgeGlowLeft.onRelease();
            mEdgeGlowRight.onRelease();
        }
        mActivePointerId = INVALID_POINTER;
        break;
    }

    case MotionEvent.ACTION_POINTER_UP: {
        onSecondaryPointerUp(ev);
        final int x = mMotionX;
        final int y = mMotionY;
        final int motionPosition = pointToPosition(x, y);
        if (motionPosition >= 0) {
            // Remember where the motion event started
            v = getChildAt(motionPosition - mFirstPosition);
            mMotionViewOriginalLeft = v.getLeft();
            mMotionPosition = motionPosition;
        }
        mLastX = x;
        break;
    }

    case MotionEvent.ACTION_POINTER_DOWN: {
        // New pointers take over dragging duties
        final int index = ev.getActionIndex();
        final int id = ev.getPointerId(index);
        final int x = (int) ev.getX(index);
        final int y = (int) ev.getY(index);
        mMotionCorrection = 0;
        mActivePointerId = id;
        mMotionX = x;
        mMotionY = y;
        final int motionPosition = pointToPosition(x, y);
        if (motionPosition >= 0) {
            // Remember where the motion event started
            v = getChildAt(motionPosition - mFirstPosition);
            mMotionViewOriginalLeft = v.getLeft();
            mMotionPosition = motionPosition;
        }
        mLastX = x;
        break;
    }
    }

    return true;
}

From source file:com.wb.launcher3.Page.java

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    int action = ev.getAction() & MotionEvent.ACTION_MASK;
    mPointCount = ev.getPointerCount();//added by zxa 1018 for adjust brightness

    //Log.i("zwb", "zhangwuba ------ luancher dispatchTouchEvent");

    boolean enable = (Settings.Secure.getInt(mContext.getContentResolver(), "tyd_gesture_launcher", 1) == 1);
    boolean gesture = false;

    if (mPointCount == 2) {
        int x1 = (int) ev.getX(0);
        int y1 = (int) ev.getY(0);

        int x2 = (int) ev.getX(1);
        int y2 = (int) ev.getY(1);

        x1Down = x1;/*w  w w .ja  v a 2 s  .  com*/
        x2Down = x2;
        y1Down = y1;
        y2Down = y2;

        xyD = (int) FloatMath.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
        //Log.i("zwb", "zhangwuba ------  xyD = " + xyD);
    }

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        //Log.i("xyz", "ACTION_DOWN");
        tempX = 0;
        tempY = 0;
        mOldY = ev.getY();
        mOldX = ev.getX();

        // mMode = DRAG;
        break;
    case MotionEvent.ACTION_POINTER_DOWN:
        mLastMultiDownDistance = getDistance(ev);
        //mMode = ZOOM;
        break;
    case MotionEvent.ACTION_UP:
        //added by zxa 1018 for multi touch panel  adjust screen light  start
        if (enable) {
            closebrightnessDialog();
        }
        //added by zxa 1018 for multi touch panel  adjust screen light  end
        //mMode = NONE;
        break;
    case MotionEvent.ACTION_POINTER_UP:
        //added by zxa 1018 for multi touch panel  adjust screen light  start
        if (enable) {
            closebrightnessDialog();
        }
        //mMode = NONE;
        break;
    case MotionEvent.ACTION_MOVE:
        int scrollLength = xyD - temp;
        temp = xyD;
        if (enable && Math.abs(scrollLength) < 5 && y1Down != (int) mOldY) {
            adjustBrightness(ev, mPointCount);
        }
        /* if (mMode == ZOOM) {
        double currentLength = getDistance(ev);
        float length = (float) (currentLength - mLastMultiDownDistance);
        if (length < SHOW_WORKSPACE_PREVIEW_THRESHOLD) {
            onMultiZoomIn(length);
        } else {
            onMultiZoomOut(length);
        }
         }*/
        break;
    }

    /*  if (mMode == ZOOM) {
    return true;
      }*/

    return super.dispatchTouchEvent(ev);
}

Example usage for android.view MotionEvent ACTION_POINTER_DOWN

Introduction

Prototype

Document

Usage