Example usage for android.view MotionEvent ACTION

Introduction

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

Prototype

int ACTION_MOVE

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

Click Source Link

Document

Constant for #getActionMasked : A change has happened during a press gesture (between #ACTION_DOWN and #ACTION_UP ).

Usage

From source file:com.baoyz.dribble.widget.SuperRecyclerView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent e) {

    boolean b = super.onInterceptTouchEvent(e);

    int actionMasked = MotionEventCompat.getActionMasked(e);
    switch (actionMasked) {
    case MotionEvent.ACTION_DOWN:
        mDownX = e.getX();/*from  w ww  .ja  v  a 2  s.c  o m*/
        mDownY = e.getY();
        mInterceptTouch = false;
        break;
    case MotionEvent.ACTION_MOVE:
        float offsetX = e.getX() - mDownX;
        if (!b && Math.abs(offsetX) > mTouchDistance)
            mInterceptTouch = true;
        break;
    }

    if (mInterceptTouch)
        return false;

    return b;
}

From source file:com.intel.xdk.multitouch.MultiTouch.java

@Override
public void initialize(CordovaInterface cordova, CordovaWebView webView) {
    super.initialize(cordova, webView);

    //get convenience reference to activity
    activity = cordova.getActivity();/*from ww w. j  a  v a2  s .  c  o m*/

    activity.runOnUiThread(new Runnable() {
        public void run() {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                try {
                    Method m = WebView.class.getMethod("setWebContentsDebuggingEnabled", boolean.class);
                    m.invoke(WebView.class, true);
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                //WebView.setWebContentsDebuggingEnabled(true);
            }
        }
    });

    touchy = new View.OnTouchListener() {

        private SparseArray<Long> pointerId2Identifier = new SparseArray<Long>();

        @Override
        public boolean onTouch(View v, MotionEvent ev) {
            if (isMultitouchEnabled) {
                int pointerCount = ev.getPointerCount();

                //get the correct action
                int maskedAction = ev.getActionMasked();
                int idx = ev.getActionIndex();
                try {
                    String js = null;
                    if (maskedAction == MotionEvent.ACTION_POINTER_DOWN
                            || maskedAction == MotionEvent.ACTION_DOWN) {
                        int x = (int) ev.getX(idx);
                        int y = (int) ev.getY(idx);
                        int h = (int) v.getHeight();
                        int w = (int) v.getWidth();
                        int id = ev.getPointerId(idx);
                        //make a timestamp identifier and store it
                        long identifier = System.currentTimeMillis();
                        pointerId2Identifier.put(id, identifier);
                        js = String.format("{id:%d,x:%d,y:%d,h:%d,w:%d,type:'touchstart'},", identifier, x, y,
                                h, w);
                        queueMultitouchData(js, id, maskedAction);
                    } else if (maskedAction == MotionEvent.ACTION_POINTER_UP
                            || maskedAction == MotionEvent.ACTION_UP) {
                        int x = (int) ev.getX(idx);
                        int y = (int) ev.getY(idx);
                        int h = (int) v.getHeight();
                        int w = (int) v.getWidth();
                        int id = ev.getPointerId(idx);
                        js = String.format("{id:%d,x:%d,y:%d,h:%d,w:%d,type:'touchend'},",
                                pointerId2Identifier.get(id), x, y, h, w);
                        pointerId2Identifier.remove(id);
                        queueMultitouchData(js, id, maskedAction);
                    } else if (maskedAction == MotionEvent.ACTION_MOVE) {
                        //send all events if it is a move
                        for (int i = 0; i < pointerCount; i++) {
                            int x = (int) ev.getX(i);
                            int y = (int) ev.getY(i);
                            int h = (int) v.getHeight();
                            int w = (int) v.getWidth();
                            int id = ev.getPointerId(i);
                            js = String.format("{id:%d,x:%d,y:%d,h:%d,w:%d,type:'touchmove'},",
                                    pointerId2Identifier.get(id), x, y, h, w);
                            queueMultitouchData(js, id, maskedAction);
                        }
                    } else {
                        Log.e("[intel.xdk]", "got a MotionEvent that is not up/down/move:" + ev);
                    }
                    //Log.i("[intel.xdk]", "onTouchEvent:"+js);
                } catch (Exception e) {
                    Log.e("[intel.xdk]", "Got an exception back from WebView: ", e);
                }

                return true;
            } else {
                return false;
            }
        }
    };
    webView.setOnTouchListener(touchy);

    lock = this;
    messages = new ArrayList<String>(0);
}

From source file:com.android.ex.photo.PhotoViewPager.java

/**
 * {@inheritDoc}/*w ww.  j  a v  a  2  s .co m*/
 * <p>
 * We intercept touch event intercepts so we can prevent switching views when the
 * current view is internally scrollable.
 */
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    final InterceptType intercept = (mListener != null) ? mListener.onTouchIntercept(mActivatedX, mActivatedY)
            : InterceptType.NONE;
    final boolean ignoreScrollLeft = (intercept == InterceptType.BOTH || intercept == InterceptType.LEFT);
    final boolean ignoreScrollRight = (intercept == InterceptType.BOTH || intercept == InterceptType.RIGHT);

    // Only check ability to page if we can't scroll in one / both directions
    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;

    if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) {
        mActivePointerId = INVALID_POINTER;
    }

    switch (action) {
    case MotionEvent.ACTION_MOVE: {
        if (ignoreScrollLeft || ignoreScrollRight) {
            final int activePointerId = mActivePointerId;
            if (activePointerId == INVALID_POINTER) {
                // If we don't have a valid id, the touch down wasn't on content.
                break;
            }

            final int pointerIndex = MotionEventCompat.findPointerIndex(ev, activePointerId);
            final float x = MotionEventCompat.getX(ev, pointerIndex);

            if (ignoreScrollLeft && ignoreScrollRight) {
                mLastMotionX = x;
                return false;
            } else if (ignoreScrollLeft && (x > mLastMotionX)) {
                mLastMotionX = x;
                return false;
            } else if (ignoreScrollRight && (x < mLastMotionX)) {
                mLastMotionX = x;
                return false;
            }
        }
        break;
    }

    case MotionEvent.ACTION_DOWN: {
        mLastMotionX = ev.getX();
        // Use the raw x/y as the children can be located anywhere and there isn't a
        // single offset that would be meaningful
        mActivatedX = ev.getRawX();
        mActivatedY = ev.getRawY();
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerIndex = MotionEventCompat.getActionIndex(ev);
        final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
        if (pointerId == mActivePointerId) {
            // Our active pointer going up; select a new active pointer
            final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
            mLastMotionX = MotionEventCompat.getX(ev, newPointerIndex);
            mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
        }
        break;
    }
    }

    return super.onInterceptTouchEvent(ev);
}

From source file:com.appsimobile.appsii.SidebarHotspot.java

@Override
public boolean onTouchEvent(MotionEvent e) {
    switch (e.getAction()) {
    case MotionEvent.ACTION_DOWN: {
        mVelocityTracker = VelocityTracker.obtain();
        mVelocityTracker.addMovement(e);
        // remove the background to make sure it does not overlap
        // the sidebar

        mIsDragOpening = true;//from   w w  w . j  ava 2s  . co  m
        setBackgroundResource(0);

        float x = e.getX();
        float y = e.getY();

        if (mCallback != null) {
            mSwipeListener = mCallback.open(this, Gesture.TO_CENTER, (int) x, (int) y);
            mSwipeInProgress = mSwipeListener != null;
            mState = STATE_AWAITING_RELEASE;
            if (mVibrate) {
                vibrate();
            }

            return true;
        }
        return false;
    }
    case MotionEvent.ACTION_MOVE:
        mVelocityTracker.addMovement(e);
        float x = e.getX();
        float y = e.getY();
        return detectSwipe(x, y, e);
    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL:
        cancelMotionHandling(e, false);
        return false;
    }

    return super.onTouchEvent(e);
}

From source file:com.android.yijiang.kzx.widget.betterpickers.widget.UnderlinePageIndicatorPicker.java

public boolean onTouchEvent(MotionEvent ev) {
    if (super.onTouchEvent(ev)) {
        return true;
    }/*  w  w  w.  j  a  v  a 2s .  co m*/
    if ((mViewPager == null) || (mViewPager.getAdapter().getCount() == 0)) {
        return false;
    }

    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mLastMotionX = ev.getX();
        break;

    case MotionEvent.ACTION_MOVE: {
        final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        final float x = MotionEventCompat.getX(ev, activePointerIndex);
        final float deltaX = x - mLastMotionX;

        if (!mIsDragging) {
            if (Math.abs(deltaX) > mTouchSlop) {
                mIsDragging = true;
            }
        }

        if (mIsDragging) {
            mLastMotionX = x;
            if (mViewPager.isFakeDragging() || mViewPager.beginFakeDrag()) {
                mViewPager.fakeDragBy(deltaX);
            }
        }

        break;
    }

    case MotionEvent.ACTION_CANCEL:
    case MotionEvent.ACTION_UP:
        if (!mIsDragging) {
            final int count = mViewPager.getAdapter().getCount();
            final int width = getWidth();
            final float halfWidth = width / 2f;
            final float sixthWidth = width / 6f;

            if ((mCurrentPage > 0) && (ev.getX() < halfWidth - sixthWidth)) {
                if (action != MotionEvent.ACTION_CANCEL) {
                    mViewPager.setCurrentItem(mCurrentPage - 1);
                }
                return true;
            } else if ((mCurrentPage < count - 1) && (ev.getX() > halfWidth + sixthWidth)) {
                if (action != MotionEvent.ACTION_CANCEL) {
                    mViewPager.setCurrentItem(mCurrentPage + 1);
                }
                return true;
            }
        }

        mIsDragging = false;
        mActivePointerId = INVALID_POINTER;
        if (mViewPager.isFakeDragging()) {
            mViewPager.endFakeDrag();
        }
        break;

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int index = MotionEventCompat.getActionIndex(ev);
        mLastMotionX = MotionEventCompat.getX(ev, index);
        mActivePointerId = MotionEventCompat.getPointerId(ev, index);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP:
        final int pointerIndex = MotionEventCompat.getActionIndex(ev);
        final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
        if (pointerId == mActivePointerId) {
            final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
            mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
        }
        mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId));
        break;
    }

    return true;
}

From source file:cn.goodjobs.common.view.photodraweeview.ScaleDragDetector.java

private void onTouchDragEvent(int action, MotionEvent ev) {
    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        mVelocityTracker = VelocityTracker.obtain();
        if (null != mVelocityTracker) {
            mVelocityTracker.addMovement(ev);
        }/*  w w  w.  ja v  a 2 s  .  com*/

        mLastTouchX = getActiveX(ev);
        mLastTouchY = getActiveY(ev);
        mIsDragging = false;
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        final float x = getActiveX(ev);
        final float y = getActiveY(ev);
        final float dx = x - mLastTouchX, dy = y - mLastTouchY;

        if (!mIsDragging) {
            mIsDragging = Math.sqrt((dx * dx) + (dy * dy)) >= mTouchSlop;
        }

        if (mIsDragging) {
            mScaleDragGestureListener.onDrag(dx, dy);
            mLastTouchX = x;
            mLastTouchY = y;

            if (null != mVelocityTracker) {
                mVelocityTracker.addMovement(ev);
            }
        }
        break;
    }

    case MotionEvent.ACTION_CANCEL: {
        if (null != mVelocityTracker) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
        break;
    }

    case MotionEvent.ACTION_UP: {
        if (mIsDragging) {
            if (null != mVelocityTracker) {
                mLastTouchX = getActiveX(ev);
                mLastTouchY = getActiveY(ev);

                mVelocityTracker.addMovement(ev);
                mVelocityTracker.computeCurrentVelocity(1000);

                final float vX = mVelocityTracker.getXVelocity(), vY = mVelocityTracker.getYVelocity();

                if (Math.max(Math.abs(vX), Math.abs(vY)) >= mMinimumVelocity) {
                    mScaleDragGestureListener.onFling(mLastTouchX, mLastTouchY, -vX, -vY);
                }
            }
        }
        if (null != mVelocityTracker) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
        break;
    }
    }
}

From source file:com.android.messaging.ui.conversationlist.ConversationListSwipeHelper.java

@Override
public boolean onInterceptTouchEvent(final RecyclerView recyclerView, final MotionEvent event) {
    if (event.getPointerCount() > 1) {
        // Ignore subsequent pointers.
        return false;
    }//ww w .j a  va2 s  .  c  o  m

    // We are not yet tracking a swipe gesture. Begin detection by spying on
    // touch events bubbling down to our children.
    final int action = event.getActionMasked();
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        if (!hasGestureSwipeTarget()) {
            onGestureStart();

            mVelocityTracker.addMovement(event);
            mInitialX = event.getX();
            mInitialY = event.getY();

            final View viewAtPoint = mRecyclerView.findChildViewUnder(mInitialX, mInitialY);
            final ConversationListItemView child = (ConversationListItemView) viewAtPoint;
            if (viewAtPoint instanceof ConversationListItemView && child != null && child.isSwipeAnimatable()) {
                // Begin detecting swipe on the target for the rest of the gesture.
                mListItemView = child;
                if (mListItemView.isAnimating()) {
                    mListItemView = null;
                }
            } else {
                mListItemView = null;
            }
        }
        break;
    case MotionEvent.ACTION_MOVE:
        if (hasValidGestureSwipeTarget()) {
            mVelocityTracker.addMovement(event);

            final int historicalCount = event.getHistorySize();
            // First consume the historical events, then consume the current ones.
            for (int i = 0; i < historicalCount + 1; i++) {
                float currX;
                float currY;
                if (i < historicalCount) {
                    currX = event.getHistoricalX(i);
                    currY = event.getHistoricalY(i);
                } else {
                    currX = event.getX();
                    currY = event.getY();
                }
                final float deltaX = currX - mInitialX;
                final float deltaY = currY - mInitialY;
                final float absDeltaX = Math.abs(deltaX);
                final float absDeltaY = Math.abs(deltaY);

                if (!mIsSwiping && absDeltaY > mTouchSlop
                        && absDeltaY > (ERROR_FACTOR_MULTIPLIER * absDeltaX)) {
                    // Stop detecting swipe for the remainder of this gesture.
                    onGestureEnd();
                    return false;
                }

                if (absDeltaX > mTouchSlop) {
                    // Swipe detected. Return true so we can handle the gesture in
                    // onTouchEvent.
                    mIsSwiping = true;

                    // We don't want to suddenly jump the slop distance.
                    mInitialX = event.getX();
                    mInitialY = event.getY();

                    onSwipeGestureStart(mListItemView);
                    return true;
                }
            }
        }
        break;
    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL:
        if (hasGestureSwipeTarget()) {
            onGestureEnd();
        }
        break;
    }

    // Start intercepting touch events from children if we detect a swipe.
    return mIsSwiping;
}

From source file:cn.ieclipse.af.view.AutoPlayView.java

@Override
public boolean onTouch(View v, MotionEvent event) {
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
    case MotionEvent.ACTION_MOVE:
    case MotionEvent.ACTION_SCROLL:
        stop();//from ww w . java 2  s.  c  o m
        break;
    case MotionEvent.ACTION_UP:
        start();
        break;
    }
    return false;
}

From source file:co.dift.ui.SwipeToAction.java

/** Private methods **/
private void init() {
    gestureDetector = new GestureDetectorCompat(recyclerView.getContext(),
            new GestureDetector.SimpleOnGestureListener() {
                @Override//from   www.  ja v a 2 s .  c  om
                public void onLongPress(MotionEvent e) {
                    logger.d("onLongPress called!");
                    if (touchedViewHolder != null) {
                        swipeListener.onLongClick(touchedViewHolder.getItemData());
                    }
                }

                @Override
                public boolean onSingleTapUp(MotionEvent e) {
                    logger.d("onSingleTapUp called!");
                    if (touchedViewHolder != null) {
                        swipeListener.onClick(touchedViewHolder.getItemData());
                        return true;
                    }
                    return super.onSingleTapUp(e);
                }
            });

    recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {

        @Override
        public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent ev) {
            gestureDetector.onTouchEvent(ev);

            switch (ev.getAction() & MotionEvent.ACTION_MASK) {
            case MotionEvent.ACTION_DOWN: {
                // starting point
                downX = ev.getX();
                downY = ev.getY();

                downTime = new Date().getTime();

                // which item are we touching
                resolveItem(downX, downY);

                break;
            }

            case MotionEvent.ACTION_UP: {
                upX = ev.getX();
                upY = ev.getY();
                upTime = new Date().getTime();

                resolveState();
                break;
            }

            case MotionEvent.ACTION_MOVE: {
                final float x = ev.getX();
                final float dx = x - downX;

                if (!shouldMove(dx))
                    break;

                // current position. moving only over x-axis
                frontViewLastX = frontViewX + dx + (dx > 0 ? -getRevealThreshold() : getRevealThreshold());
                //                        logger.d("dx: %f, frontViewLastX: %f", dx, frontViewLastX);
                if (maxSwipeXPosition != null) {
                    if (frontViewLastX > 0 && frontViewLastX > maxSwipeXPosition) {
                        frontViewLastX = maxSwipeXPosition;
                    } else if (frontViewLastX <= -maxSwipeXPosition) {
                        frontViewLastX = -maxSwipeXPosition;
                    }
                }
                frontView.setX(frontViewLastX);

                if (frontViewLastX > 0) {
                    revealRight();
                } else {
                    revealLeft();
                }

                break;
            }

            case MotionEvent.ACTION_CANCEL: {
                resolveState();

                break;
            }
            }

            return false;
        }

        @Override
        public void onTouchEvent(RecyclerView rv, MotionEvent e) {
            logger.d("onTouchEvent called");
        }

        @Override
        public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
            logger.d("onRequestDisallowInterceptTouchEvent called");
        }
    });
}

From source file:com.bluetech.gallery5.ui.ImageDetailFragment.java

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    /*//from w w  w  .j ava  2s . c  o m
    // Inflate and locate the main ImageView
    final View v = inflater.inflate(R.layout.image_detail_fragment, container, false);
    mImageView = (ImageView) v.findViewById(R.id.imageRecycView);
    return v;
    */
    final View v = inflater.inflate(R.layout.image_detail_fragment, container, false);
    mImageView = (ImageView) v.findViewById(R.id.imageRecycView);
    //ImageView img = new ImageView(getActivity());

    mImageView.setPadding(6, 6, 6, 6);

    // mImageView.setLayoutParams(new Gallery.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)) ;
    //ImageViewHelperURL.setUrlDrawable((ImageView) img, url, R.drawable.no_image) ;

    mImageView.setOnTouchListener(new View.OnTouchListener() {
        private static final String TAG = "SlideImageView";
        // These matrices will be used to move and zoom image
        Matrix matrix = new Matrix();
        Matrix savedMatrix = new Matrix();

        // We can be in one of these 3 states
        static final int NONE = 0;
        static final int DRAG = 1;
        static final int ZOOM = 2;
        int mode = NONE;

        // Remember some things for zooming
        PointF start = new PointF();
        PointF mid = new PointF();
        float oldDist = 1f;

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            ImageView view = (ImageView) v;

            // Dump touch event to log
            dumpEvent(event);

            // Handle touch events here...
            switch (event.getAction() & MotionEvent.ACTION_MASK) {
            case MotionEvent.ACTION_DOWN:
                savedMatrix.set(matrix);
                start.set(event.getX(), event.getY());
                Log.d(TAG, "mode=DRAG");
                mode = DRAG;
                break;
            case MotionEvent.ACTION_POINTER_DOWN:
                oldDist = spacing(event);
                Log.d(TAG, "oldDist=" + oldDist);
                if (oldDist > 10f) {
                    savedMatrix.set(matrix);
                    midPoint(mid, event);
                    mode = ZOOM;
                    Log.d(TAG, "mode=ZOOM");
                }
                break;
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_POINTER_UP:
                mode = NONE;
                Log.d(TAG, "mode=NONE");
                break;
            case MotionEvent.ACTION_MOVE:
                if (mode == DRAG) {
                    // ...
                    matrix.set(savedMatrix);
                    matrix.postTranslate(event.getX() - start.x, event.getY() - start.y);
                } else if (mode == ZOOM) {
                    float newDist = spacing(event);
                    Log.d(TAG, "newDist=" + newDist);
                    if (newDist > 10f) {
                        matrix.set(savedMatrix);
                        float scale = newDist / oldDist;
                        Log.d(TAG, "ZOOOOOOOM: " + scale);
                        matrix.postScale(scale, scale, mid.x, mid.y);
                    }
                }
                break;
            }

            view.setImageMatrix(matrix);
            return true; // indicate event was handled
        }

        /** Show an event in the LogCat view, for debugging */
        private void dumpEvent(MotionEvent event) {
            String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE", "POINTER_DOWN", "POINTER_UP", "7?",
                    "8?", "9?" };
            StringBuilder sb = new StringBuilder();
            int action = event.getAction();
            int actionCode = action & MotionEvent.ACTION_MASK;
            sb.append("event ACTION_").append(names[actionCode]);
            if (actionCode == MotionEvent.ACTION_POINTER_DOWN || actionCode == MotionEvent.ACTION_POINTER_UP) {
                sb.append("(pid ").append(action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
                sb.append(")");
            }
            sb.append("[");
            for (int i = 0; i < event.getPointerCount(); i++) {
                sb.append("#").append(i);
                sb.append("(pid ").append(event.getPointerId(i));
                sb.append(")=").append((int) event.getX(i));
                sb.append(",").append((int) event.getY(i));
                if (i + 1 < event.getPointerCount())
                    sb.append(";");
            }
            sb.append("]");
            Log.d(TAG, sb.toString());
        }

        /** Determine the space between the first two fingers */
        private float spacing(MotionEvent event) {
            float x = event.getX(0) - event.getX(1);
            float y = event.getY(0) - event.getY(1);
            return (float) Math.sqrt(x * x + y * y);
        }

        /** Calculate the mid point of the first two fingers */
        private void midPoint(PointF point, MotionEvent event) {
            float x = event.getX(0) + event.getX(1);
            float y = event.getY(0) + event.getY(1);
            point.set(x / 2, y / 2);
        }
    });

    return v;

}

Example usage for android.view MotionEvent ACTION_MOVE

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