Example usage for android.view MotionEvent ACTION_MOVE

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.processing.core.PApplet.java

/**
 * Figure out how to process a mouse event. When loop() has been
 * called, the events will be queued up until drawing is complete.
 * If noLoop() has been called, then events will happen immediately.
 *//*from   w w w.ja v  a  2  s . co  m*/
protected void nativeMotionEvent(android.view.MotionEvent motionEvent) {
    //    enqueueMotionEvent(event);
    //
    //    // this will be the last event in the list
    //    AndroidTouchEvent pme = motionEventQueue[motionEventCount + historyCount];
    //    pme.setAction(event.getAction());
    //    pme.setNumPointers(event.getPointerCount());
    //    pme.setPointers(event);
    //
    //    // historical events happen before the 'current' values
    //    if (pme.action == MotionEvent.ACTION_MOVE && historyCount > 0) {
    //      for (int i = 0; i < historyCount; i++) {
    //        AndroidTouchEvent hist = motionEventQueue[motionEventCount++];
    //        hist.setAction(event.getAction());
    //        hist.setNumPointers(event.getPointerCount());
    //        hist.setPointers(event, i);
    //      }
    //    }

    // ACTION_HOVER_ENTER and ACTION_HOVER_EXIT are passed into
    // onGenericMotionEvent(android.view.MotionEvent)
    // if we want to implement mouseEntered/Exited

    // http://developer.android.com/reference/android/view/MotionEvent.html
    // http://android-developers.blogspot.com/2010/06/making-sense-of-multitouch.html
    // http://www.techrepublic.com/blog/app-builder/use-androids-gesture-detector-to-translate-a-swipe-into-an-event/1577

    int metaState = motionEvent.getMetaState();
    int modifiers = 0;
    if ((metaState & android.view.KeyEvent.META_SHIFT_ON) != 0) {
        modifiers |= Event.SHIFT;
    }
    if ((metaState & META_CTRL_ON) != 0) {
        modifiers |= Event.CTRL;
    }
    if ((metaState & META_META_ON) != 0) {
        modifiers |= Event.META;
    }
    if ((metaState & android.view.KeyEvent.META_ALT_ON) != 0) {
        modifiers |= Event.ALT;
    }

    int clickCount = 1; // not really set... (i.e. not catching double taps)
    int index;

    // MotionEvent.html -> getButtonState() does BUTTON_PRIMARY, SECONDARY, TERTIARY
    //   use this for left/right/etc
    switch (motionEvent.getAction()) {
    case MotionEvent.ACTION_DOWN:
        motionPointerId = motionEvent.getPointerId(0);
        postEvent(new MouseEvent(motionEvent, motionEvent.getEventTime(), MouseEvent.PRESS, modifiers,
                (int) motionEvent.getX(), (int) motionEvent.getY(), LEFT, clickCount));
        break;
    case MotionEvent.ACTION_MOVE:
        //      int historySize = motionEvent.getHistorySize();
        index = motionEvent.findPointerIndex(motionPointerId);
        if (index != -1) {
            postEvent(new MouseEvent(motionEvent, motionEvent.getEventTime(), MouseEvent.DRAG, modifiers,
                    (int) motionEvent.getX(index), (int) motionEvent.getY(index), LEFT, clickCount));
        }
        break;
    case MotionEvent.ACTION_UP:
        index = motionEvent.findPointerIndex(motionPointerId);
        if (index != -1) {
            postEvent(new MouseEvent(motionEvent, motionEvent.getEventTime(), MouseEvent.RELEASE, modifiers,
                    (int) motionEvent.getX(index), (int) motionEvent.getY(index), LEFT, clickCount));
        }
        break;
    }
    //postEvent(pme);
}

---

From source file:au.com.glassechidna.velocityviewpager.VelocityViewPager.java

/**
 * Fake drag by an offset in pixels. You must have called {@link #beginFakeDrag()} first.
 *
 * @param xOffset Offset in pixels to drag by.
 * @see #beginFakeDrag()/*from   ww w .j  ava2s  .c om*/
 * @see #endFakeDrag()
 */
public void fakeDragBy(float xOffset) {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    }

    mLastMotionX += xOffset;

    float oldScrollX = getScrollX();
    float scrollX = oldScrollX - xOffset;
    final int width = getClientWidth();

    float leftBound = width * mFirstOffset;
    float rightBound = width * mLastOffset;

    final ItemInfo firstItem = mItems.get(0);
    final ItemInfo lastItem = mItems.get(mItems.size() - 1);
    if (firstItem.position != 0) {
        leftBound = firstItem.offset * width;
    }
    if (lastItem.position != mAdapter.getCount() - 1) {
        rightBound = lastItem.offset * width;
    }

    if (scrollX < leftBound) {
        scrollX = leftBound;
    } else if (scrollX > rightBound) {
        scrollX = rightBound;
    }
    // Don't lose the rounded component
    mLastMotionX += scrollX - (int) scrollX;
    scrollTo((int) scrollX, getScrollY());
    pageScrolled((int) scrollX);

    // Synthesize an event for the VelocityTracker.
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE, mLastMotionX,
            0, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
}

---

From source file:com.av.remusic.widget.RoundViewPager.java

/**
 * Fake drag by an offset in pixels. You must have called {@link #beginFakeDrag()} first.
 *
 * @param xOffset Offset in pixels to drag by.
 * @see #beginFakeDrag()//from   w  w  w  .j a  va2  s.  c om
 * @see #endFakeDrag()
 */
public void fakeDragBy(float xOffset) {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    }

    if (mAdapter == null) {
        return;
    }

    mLastMotionX += xOffset;

    float oldScrollX = getScrollX();
    float scrollX = oldScrollX - xOffset;
    final int width = getClientWidth();

    float leftBound = width * mFirstOffset;
    float rightBound = width * mLastOffset;

    final ItemInfo firstItem = mItems.get(0);
    final ItemInfo lastItem = mItems.get(mItems.size() - 1);
    if (firstItem.position != 0) {
        leftBound = firstItem.offset * width;
    }
    if (lastItem.position != mAdapter.getCount() - 1) {
        rightBound = lastItem.offset * width;
    }

    if (scrollX < leftBound) {
        scrollX = leftBound;
    } else if (scrollX > rightBound) {
        scrollX = rightBound;
    }
    // Don't lose the rounded component
    mLastMotionX += scrollX - (int) scrollX;
    scrollTo((int) scrollX, getScrollY());
    pageScrolled((int) scrollX);

    // Synthesize an event for the VelocityTracker.
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE, mLastMotionX,
            0, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
}

---

From source file:android.support.v71.widget.RecyclerView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
    if (mLayoutFrozen) {
        // When layout is frozen,  RV does not intercept the motion event.
        // A child view e.g. a button may still get the click.
        return false;
    }//from  www .  ja v  a  2 s  .  co  m
    if (dispatchOnItemTouchIntercept(e)) {
        cancelTouch();
        return true;
    }

    if (mLayout == null) {
        return false;
    }

    final boolean canScrollHorizontally = mLayout.canScrollHorizontally();
    final boolean canScrollVertically = mLayout.canScrollVertically();

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

    final int action = MotionEventCompat.getActionMasked(e);
    final int actionIndex = MotionEventCompat.getActionIndex(e);

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        if (mIgnoreMotionEventTillDown) {
            mIgnoreMotionEventTillDown = false;
        }
        mScrollPointerId = MotionEventCompat.getPointerId(e, 0);
        mInitialTouchX = mLastTouchX = (int) (e.getX() + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (e.getY() + 0.5f);

        if (mScrollState == SCROLL_STATE_SETTLING) {
            getParent().requestDisallowInterceptTouchEvent(true);
            setScrollState(SCROLL_STATE_DRAGGING);
        }

        // Clear the nested offsets
        mNestedOffsets[0] = mNestedOffsets[1] = 0;

        int nestedScrollAxis = ViewCompat.SCROLL_AXIS_NONE;
        if (canScrollHorizontally) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_HORIZONTAL;
        }
        if (canScrollVertically) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_VERTICAL;
        }
        startNestedScroll(nestedScrollAxis);
        break;

    case MotionEventCompat.ACTION_POINTER_DOWN:
        mScrollPointerId = MotionEventCompat.getPointerId(e, actionIndex);
        mInitialTouchX = mLastTouchX = (int) (MotionEventCompat.getX(e, actionIndex) + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (MotionEventCompat.getY(e, actionIndex) + 0.5f);
        break;

    case MotionEvent.ACTION_MOVE: {
        final int index = MotionEventCompat.findPointerIndex(e, mScrollPointerId);
        if (index < 0) {
            Log.e(TAG, "Error processing scroll; pointer index for id " + mScrollPointerId
                    + " not found. Did any MotionEvents get skipped?");
            return false;
        }

        final int x = (int) (MotionEventCompat.getX(e, index) + 0.5f);
        final int y = (int) (MotionEventCompat.getY(e, index) + 0.5f);
        if (mScrollState != SCROLL_STATE_DRAGGING) {
            final int dx = x - mInitialTouchX;
            final int dy = y - mInitialTouchY;
            boolean startScroll = false;
            if (canScrollHorizontally && Math.abs(dx) > mTouchSlop) {
                mLastTouchX = mInitialTouchX + mTouchSlop * (dx < 0 ? -1 : 1);
                startScroll = true;
            }
            if (canScrollVertically && Math.abs(dy) > mTouchSlop) {
                mLastTouchY = mInitialTouchY + mTouchSlop * (dy < 0 ? -1 : 1);
                startScroll = true;
            }
            if (startScroll) {
                setScrollState(SCROLL_STATE_DRAGGING);
            }
        }
    }
        break;

    case MotionEventCompat.ACTION_POINTER_UP: {
        onPointerUp(e);
    }
        break;

    case MotionEvent.ACTION_UP: {
        mVelocityTracker.clear();
        stopNestedScroll();
    }
        break;

    case MotionEvent.ACTION_CANCEL: {
        cancelTouch();
    }
    }
    return mScrollState == SCROLL_STATE_DRAGGING;
}

---

From source file:com.anysoftkeyboard.keyboards.views.AnyKeyboardBaseView.java

@Override
public boolean onTouchEvent(MotionEvent nativeMotionEvent) {
    if (mKeyboard == null)//I mean, if there isn't any keyboard I'm handling, what's the point?
        return false;
    final int action = MotionEventCompat.getActionMasked(nativeMotionEvent);
    final int pointerCount = MotionEventCompat.getPointerCount(nativeMotionEvent);
    final int oldPointerCount = mOldPointerCount;
    mOldPointerCount = pointerCount;//from  w w  w  . j a v a2s.  c o  m
    if (pointerCount > 1)
        mLastTimeHadTwoFingers = SystemClock.elapsedRealtime();//marking the time. Read isAtTwoFingersState()

    if (mTouchesAreDisabledTillLastFingerIsUp) {
        if (mOldPointerCount == 1 && (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP)) {
            mTouchesAreDisabledTillLastFingerIsUp = false;
        }

        return true;
    }
    // TODO: cleanup this code into a multi-touch to single-touch event
    // converter class?
    // If the device does not have distinct multi-touch support panel,
    // ignore all multi-touch
    // events except a transition from/to single-touch.
    if (!mHasDistinctMultitouch && pointerCount > 1 && oldPointerCount > 1) {
        return true;
    }

    // Gesture detector must be enabled only when mini-keyboard is not
    // on the screen.
    if (!mMiniKeyboardVisible && mGestureDetector != null
            && (mGestureDetector.onTouchEvent(nativeMotionEvent))) {
        Log.d(TAG, "Gesture detected!");
        mHandler.cancelKeyTimers();
        dismissKeyPreview();
        return true;
    }

    final long eventTime = nativeMotionEvent.getEventTime();
    final int index = MotionEventCompat.getActionIndex(nativeMotionEvent);
    final int id = nativeMotionEvent.getPointerId(index);
    final int x = (int) nativeMotionEvent.getX(index);
    final int y = (int) nativeMotionEvent.getY(index);

    // Needs to be called after the gesture detector gets a turn, as it
    // may have
    // displayed the mini keyboard
    if (mMiniKeyboard != null && mMiniKeyboardVisible) {
        final int miniKeyboardPointerIndex = nativeMotionEvent.findPointerIndex(mMiniKeyboardTrackerId);
        if (miniKeyboardPointerIndex >= 0 && miniKeyboardPointerIndex < pointerCount) {
            final int miniKeyboardX = (int) nativeMotionEvent.getX(miniKeyboardPointerIndex);
            final int miniKeyboardY = (int) nativeMotionEvent.getY(miniKeyboardPointerIndex);
            MotionEvent translated = generateMiniKeyboardMotionEvent(action, miniKeyboardX, miniKeyboardY,
                    eventTime);
            mMiniKeyboard.onTouchEvent(translated);
            translated.recycle();
        }
        return true;
    }

    if (mHandler.isInKeyRepeat()) {
        // It will keep being in the key repeating mode while the key is
        // being pressed.
        if (action == MotionEvent.ACTION_MOVE) {
            return true;
        }
        final PointerTracker tracker = getPointerTracker(id);
        // Key repeating timer will be canceled if 2 or more keys are in
        // action, and current
        // event (UP or DOWN) is non-modifier key.
        if (pointerCount > 1 && !tracker.isModifier()) {
            mHandler.cancelKeyRepeatTimer();
        }
        // Up event will pass through.
    }

    // TODO: cleanup this code into a multi-touch to single-touch event
    // converter class?
    // Translate mutli-touch event to single-touch events on the device
    // that has no distinct
    // multi-touch panel.
    if (!mHasDistinctMultitouch) {
        // Use only main (id=0) pointer tracker.
        PointerTracker tracker = getPointerTracker(0);
        if (pointerCount == 1 && oldPointerCount == 2) {
            // Multi-touch to single touch transition.
            // Send a down event for the latest pointer.
            tracker.onDownEvent(x, y, eventTime);
        } else if (pointerCount == 2 && oldPointerCount == 1) {
            // Single-touch to multi-touch transition.
            // Send an up event for the last pointer.
            tracker.onUpEvent(tracker.getLastX(), tracker.getLastY(), eventTime);
        } else if (pointerCount == 1 && oldPointerCount == 1) {
            tracker.onTouchEvent(action, x, y, eventTime);
        } else {
            Log.w(TAG, "Unknown touch panel behavior: pointer count is " + pointerCount + " (old "
                    + oldPointerCount + ")");
        }
        return true;
    }

    if (action == MotionEvent.ACTION_MOVE) {
        for (int i = 0; i < pointerCount; i++) {
            PointerTracker tracker = getPointerTracker(nativeMotionEvent.getPointerId(i));
            tracker.onMoveEvent((int) nativeMotionEvent.getX(i), (int) nativeMotionEvent.getY(i), eventTime);
        }
    } else {
        PointerTracker tracker = getPointerTracker(id);
        sendOnXEvent(action, eventTime, x, y, tracker);
    }

    return true;
}

---

From source file:android.support.v71.widget.RecyclerView.java

@Override
public boolean onTouchEvent(MotionEvent e) {
    if (mLayoutFrozen || mIgnoreMotionEventTillDown) {
        return false;
    }/*from  ww w  .  ja  v a2  s. c  o  m*/
    if (dispatchOnItemTouch(e)) {
        cancelTouch();
        return true;
    }

    if (mLayout == null) {
        return false;
    }

    final boolean canScrollHorizontally = mLayout.canScrollHorizontally();
    final boolean canScrollVertically = mLayout.canScrollVertically();

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    boolean eventAddedToVelocityTracker = false;

    final MotionEvent vtev = MotionEvent.obtain(e);
    final int action = MotionEventCompat.getActionMasked(e);
    final int actionIndex = MotionEventCompat.getActionIndex(e);

    if (action == MotionEvent.ACTION_DOWN) {
        mNestedOffsets[0] = mNestedOffsets[1] = 0;
    }
    vtev.offsetLocation(mNestedOffsets[0], mNestedOffsets[1]);

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        mScrollPointerId = MotionEventCompat.getPointerId(e, 0);
        mInitialTouchX = mLastTouchX = (int) (e.getX() + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (e.getY() + 0.5f);

        int nestedScrollAxis = ViewCompat.SCROLL_AXIS_NONE;
        if (canScrollHorizontally) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_HORIZONTAL;
        }
        if (canScrollVertically) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_VERTICAL;
        }
        startNestedScroll(nestedScrollAxis);
    }
        break;

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        mScrollPointerId = MotionEventCompat.getPointerId(e, actionIndex);
        mInitialTouchX = mLastTouchX = (int) (MotionEventCompat.getX(e, actionIndex) + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (MotionEventCompat.getY(e, actionIndex) + 0.5f);
    }
        break;

    case MotionEvent.ACTION_MOVE: {
        final int index = MotionEventCompat.findPointerIndex(e, mScrollPointerId);
        if (index < 0) {
            Log.e(TAG, "Error processing scroll; pointer index for id " + mScrollPointerId
                    + " not found. Did any MotionEvents get skipped?");
            return false;
        }

        final int x = (int) (MotionEventCompat.getX(e, index) + 0.5f);
        final int y = (int) (MotionEventCompat.getY(e, index) + 0.5f);
        int dx = mLastTouchX - x;
        int dy = mLastTouchY - y;

        if (dispatchNestedPreScroll(dx, dy, mScrollConsumed, mScrollOffset)) {
            dx -= mScrollConsumed[0];
            dy -= mScrollConsumed[1];
            vtev.offsetLocation(mScrollOffset[0], mScrollOffset[1]);
            // Updated the nested offsets
            mNestedOffsets[0] += mScrollOffset[0];
            mNestedOffsets[1] += mScrollOffset[1];
        }

        if (mScrollState != SCROLL_STATE_DRAGGING) {
            boolean startScroll = false;
            if (canScrollHorizontally && Math.abs(dx) > mTouchSlop) {
                if (dx > 0) {
                    dx -= mTouchSlop;
                } else {
                    dx += mTouchSlop;
                }
                startScroll = true;
            }
            if (canScrollVertically && Math.abs(dy) > mTouchSlop) {
                if (dy > 0) {
                    dy -= mTouchSlop;
                } else {
                    dy += mTouchSlop;
                }
                startScroll = true;
            }
            if (startScroll) {
                setScrollState(SCROLL_STATE_DRAGGING);
            }
        }

        if (mScrollState == SCROLL_STATE_DRAGGING) {
            mLastTouchX = x - mScrollOffset[0];
            mLastTouchY = y - mScrollOffset[1];

            if (scrollByInternal(canScrollHorizontally ? dx : 0, canScrollVertically ? dy : 0, vtev)) {
                getParent().requestDisallowInterceptTouchEvent(true);
            }
        }
    }
        break;

    case MotionEventCompat.ACTION_POINTER_UP: {
        onPointerUp(e);
    }
        break;

    case MotionEvent.ACTION_UP: {
        mVelocityTracker.addMovement(vtev);
        eventAddedToVelocityTracker = true;
        mVelocityTracker.computeCurrentVelocity(1000, mMaxFlingVelocity);
        final float xvel = canScrollHorizontally
                ? -VelocityTrackerCompat.getXVelocity(mVelocityTracker, mScrollPointerId)
                : 0;
        final float yvel = canScrollVertically
                ? -VelocityTrackerCompat.getYVelocity(mVelocityTracker, mScrollPointerId)
                : 0;
        if (!((xvel != 0 || yvel != 0) && fling((int) xvel, (int) yvel))) {
            setScrollState(SCROLL_STATE_IDLE);
        }
        resetTouch();
    }
        break;

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

    if (!eventAddedToVelocityTracker) {
        mVelocityTracker.addMovement(vtev);
    }
    vtev.recycle();

    return true;
}

---

From source file:cn.androidy.materialdesignsample.ryanharterviewpager.ViewPager.java

/**
 * Fake drag by an offset in pixels. You must have called {@link #beginFakeDrag()} first.
 *
 * @param offset Offset in pixels to drag by.
 * @see #beginFakeDrag()/*from  ww w  . j  av  a 2 s  .  c  o  m*/
 * @see #endFakeDrag()
 */
public void fakeDragBy(float offset) {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    }

    if (isOrientationHorizontal()) {
        mLastMotionX += offset;

        float oldScrollX = getScrollX();
        float scrollX = oldScrollX - offset;
        final int width = getClientWidth();

        float leftBound = width * mFirstOffset;
        float rightBound = width * mLastOffset;

        final ItemInfo firstItem = mItems.get(0);
        final ItemInfo lastItem = mItems.get(mItems.size() - 1);
        if (firstItem.position != 0) {
            leftBound = firstItem.offset * width;
        }
        if (lastItem.position != mAdapter.getCount() - 1) {
            rightBound = lastItem.offset * width;
        }

        if (scrollX < leftBound) {
            scrollX = leftBound;
        } else if (scrollX > rightBound) {
            scrollX = rightBound;
        }
        // Don't lose the rounded component
        mLastMotionX += scrollX - (int) scrollX;
        scrollTo((int) scrollX, getScrollY());
        pageScrolled((int) scrollX);

        // Synthesize an event for the VelocityTracker.
        final long time = SystemClock.uptimeMillis();
        final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE,
                mLastMotionX, 0, 0);
        mVelocityTracker.addMovement(ev);
        ev.recycle();
    } else {
        mLastMotionY += offset;

        float oldScrollY = getScrollY();
        float scrollY = oldScrollY - offset;
        final int height = getClientHeight();

        float topBound = height * mFirstOffset;
        float bottomBound = height * mLastOffset;

        final ItemInfo firstItem = mItems.get(0);
        final ItemInfo lastItem = mItems.get(mItems.size() - 1);
        if (firstItem.position != 0) {
            topBound = firstItem.offset * height;
        }
        if (lastItem.position != mAdapter.getCount() - 1) {
            bottomBound = lastItem.offset * height;
        }

        if (scrollY < topBound) {
            scrollY = topBound;
        } else if (scrollY > bottomBound) {
            scrollY = bottomBound;
        }
        // Don't lose the rounded component
        mLastMotionY += scrollY - (int) scrollY;
        scrollTo(getScrollX(), (int) scrollY);
        pageScrolled((int) scrollY);

        // Synthesize an event for the VelocityTracker.
        final long time = SystemClock.uptimeMillis();
        final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE, 0,
                mLastMotionY, 0);
        mVelocityTracker.addMovement(ev);
        ev.recycle();
    }
}

---

From source file:android.improving.utils.views.cardsview.OrientedViewPager.java

/**
 * Fake drag by an offset in pixels. You must have called {@link #beginFakeDrag()} first.
 *
 * @param offset Offset in pixels to drag by.
 * @see #beginFakeDrag()//from www.  j a  va2s .  c  o m
 * @see #endFakeDrag()
 */
public void fakeDragBy(float offset) {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    }

    if (mOrientation == Orientation.VERTICAL) {
        mLastMotionY += offset;

        float oldScrollY = getScrollY();
        float scrollY = oldScrollY - offset;
        final int height = getClientSize();

        float topBound = height * mFirstOffset;
        float bottomBound = height * mLastOffset;

        final ItemInfo firstItem = mItems.get(0);
        final ItemInfo lastItem = mItems.get(mItems.size() - 1);
        if (firstItem.position != 0) {
            topBound = firstItem.offset * height;
        }
        if (lastItem.position != mAdapter.getCount() - 1) {
            bottomBound = lastItem.offset * height;
        }

        if (scrollY < topBound) {
            scrollY = topBound;
        } else if (scrollY > bottomBound) {
            scrollY = bottomBound;
        }
        // Don't lose the rounded component
        mLastMotionY += scrollY - (int) scrollY;
        scrollTo(getScrollX(), (int) scrollY);
        pageScrolled((int) scrollY);

        // Synthesize an event for the VelocityTracker.
        final long time = SystemClock.uptimeMillis();
        final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE, 0,
                mLastMotionY, 0);
        mVelocityTracker.addMovement(ev);
        ev.recycle();
    } else {
        mLastMotionX += offset;

        float oldScrollX = getScrollX();
        float scrollX = oldScrollX - offset;
        final int width = getClientSize();

        float leftBound = width * mFirstOffset;
        float rightBound = width * mLastOffset;

        final ItemInfo firstItem = mItems.get(0);
        final ItemInfo lastItem = mItems.get(mItems.size() - 1);
        if (firstItem.position != 0) {
            leftBound = firstItem.offset * width;
        }
        if (lastItem.position != mAdapter.getCount() - 1) {
            rightBound = lastItem.offset * width;
        }

        if (scrollX < leftBound) {
            scrollX = leftBound;
        } else if (scrollX > rightBound) {
            scrollX = rightBound;
        }
        // Don't lose the rounded component
        mLastMotionX += scrollX - (int) scrollX;
        scrollTo((int) scrollX, getScrollY());
        pageScrolled((int) scrollX);

        // Synthesize an event for the VelocityTracker.
        final long time = SystemClock.uptimeMillis();
        final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE,
                mLastMotionX, 0, 0);
        mVelocityTracker.addMovement(ev);
        ev.recycle();
    }
}

---

From source file:cn.ismartv.tvrecyclerview.widget.RecyclerView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
    if (mLayoutFrozen) {
        // When layout is frozen,  RV does not intercept the motion event.
        // A child view e.g. a button may still get the click.
        return false;
    }//w ww.  j a v a 2s.c o  m
    if (dispatchOnItemTouchIntercept(e)) {
        cancelTouch();
        return true;
    }

    if (mLayout == null) {
        return false;
    }

    final boolean canScrollHorizontally = mLayout.canScrollHorizontally();
    final boolean canScrollVertically = mLayout.canScrollVertically();

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

    final int action = MotionEventCompat.getActionMasked(e);
    final int actionIndex = MotionEventCompat.getActionIndex(e);

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        if (mIgnoreMotionEventTillDown) {
            mIgnoreMotionEventTillDown = false;
        }
        mScrollPointerId = e.getPointerId(0);
        mInitialTouchX = mLastTouchX = (int) (e.getX() + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (e.getY() + 0.5f);

        if (mScrollState == SCROLL_STATE_SETTLING) {
            getParent().requestDisallowInterceptTouchEvent(true);
            setScrollState(SCROLL_STATE_DRAGGING);
        }

        // Clear the nested offsets
        mNestedOffsets[0] = mNestedOffsets[1] = 0;

        int nestedScrollAxis = ViewCompat.SCROLL_AXIS_NONE;
        if (canScrollHorizontally) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_HORIZONTAL;
        }
        if (canScrollVertically) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_VERTICAL;
        }
        startNestedScroll(nestedScrollAxis);
        break;

    case MotionEventCompat.ACTION_POINTER_DOWN:
        mScrollPointerId = e.getPointerId(actionIndex);
        mInitialTouchX = mLastTouchX = (int) (e.getX(actionIndex) + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (e.getY(actionIndex) + 0.5f);
        break;

    case MotionEvent.ACTION_MOVE: {
        final int index = e.findPointerIndex(mScrollPointerId);
        if (index < 0) {
            Log.e(TAG, "Error processing scroll; pointer index for id " + mScrollPointerId
                    + " not found. Did any MotionEvents get skipped?");
            return false;
        }

        final int x = (int) (e.getX(index) + 0.5f);
        final int y = (int) (e.getY(index) + 0.5f);
        if (mScrollState != SCROLL_STATE_DRAGGING) {
            final int dx = x - mInitialTouchX;
            final int dy = y - mInitialTouchY;
            boolean startScroll = false;
            if (canScrollHorizontally && Math.abs(dx) > mTouchSlop) {
                mLastTouchX = mInitialTouchX + mTouchSlop * (dx < 0 ? -1 : 1);
                startScroll = true;
            }
            if (canScrollVertically && Math.abs(dy) > mTouchSlop) {
                mLastTouchY = mInitialTouchY + mTouchSlop * (dy < 0 ? -1 : 1);
                startScroll = true;
            }
            if (startScroll) {
                setScrollState(SCROLL_STATE_DRAGGING);
            }
        }
    }
        break;

    case MotionEventCompat.ACTION_POINTER_UP: {
        onPointerUp(e);
    }
        break;

    case MotionEvent.ACTION_UP: {
        mVelocityTracker.clear();
        stopNestedScroll();
    }
        break;

    case MotionEvent.ACTION_CANCEL: {
        cancelTouch();
    }
    }
    return mScrollState == SCROLL_STATE_DRAGGING;
}

---

From source file:cn.ismartv.tvrecyclerview.widget.RecyclerView.java

@Override
public boolean onTouchEvent(MotionEvent e) {
    if (mLayoutFrozen || mIgnoreMotionEventTillDown) {
        return false;
    }/* ww w. ja  va2  s.co  m*/
    if (dispatchOnItemTouch(e)) {
        cancelTouch();
        return true;
    }

    if (mLayout == null) {
        return false;
    }

    final boolean canScrollHorizontally = mLayout.canScrollHorizontally();
    final boolean canScrollVertically = mLayout.canScrollVertically();

    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    }
    boolean eventAddedToVelocityTracker = false;

    final MotionEvent vtev = MotionEvent.obtain(e);
    final int action = MotionEventCompat.getActionMasked(e);
    final int actionIndex = MotionEventCompat.getActionIndex(e);

    if (action == MotionEvent.ACTION_DOWN) {
        mNestedOffsets[0] = mNestedOffsets[1] = 0;
    }
    vtev.offsetLocation(mNestedOffsets[0], mNestedOffsets[1]);

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        mScrollPointerId = e.getPointerId(0);
        mInitialTouchX = mLastTouchX = (int) (e.getX() + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (e.getY() + 0.5f);

        int nestedScrollAxis = ViewCompat.SCROLL_AXIS_NONE;
        if (canScrollHorizontally) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_HORIZONTAL;
        }
        if (canScrollVertically) {
            nestedScrollAxis |= ViewCompat.SCROLL_AXIS_VERTICAL;
        }
        startNestedScroll(nestedScrollAxis);
    }
        break;

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        mScrollPointerId = e.getPointerId(actionIndex);
        mInitialTouchX = mLastTouchX = (int) (e.getX(actionIndex) + 0.5f);
        mInitialTouchY = mLastTouchY = (int) (e.getY(actionIndex) + 0.5f);
    }
        break;

    case MotionEvent.ACTION_MOVE: {
        final int index = e.findPointerIndex(mScrollPointerId);
        if (index < 0) {
            Log.e(TAG, "Error processing scroll; pointer index for id " + mScrollPointerId
                    + " not found. Did any MotionEvents get skipped?");
            return false;
        }

        final int x = (int) (e.getX(index) + 0.5f);
        final int y = (int) (e.getY(index) + 0.5f);
        int dx = mLastTouchX - x;
        int dy = mLastTouchY - y;

        if (dispatchNestedPreScroll(dx, dy, mScrollConsumed, mScrollOffset)) {
            dx -= mScrollConsumed[0];
            dy -= mScrollConsumed[1];
            vtev.offsetLocation(mScrollOffset[0], mScrollOffset[1]);
            // Updated the nested offsets
            mNestedOffsets[0] += mScrollOffset[0];
            mNestedOffsets[1] += mScrollOffset[1];
        }

        if (mScrollState != SCROLL_STATE_DRAGGING) {
            boolean startScroll = false;
            if (canScrollHorizontally && Math.abs(dx) > mTouchSlop) {
                if (dx > 0) {
                    dx -= mTouchSlop;
                } else {
                    dx += mTouchSlop;
                }
                startScroll = true;
            }
            if (canScrollVertically && Math.abs(dy) > mTouchSlop) {
                if (dy > 0) {
                    dy -= mTouchSlop;
                } else {
                    dy += mTouchSlop;
                }
                startScroll = true;
            }
            if (startScroll) {
                setScrollState(SCROLL_STATE_DRAGGING);
            }
        }

        if (mScrollState == SCROLL_STATE_DRAGGING) {
            mLastTouchX = x - mScrollOffset[0];
            mLastTouchY = y - mScrollOffset[1];

            if (scrollByInternal(canScrollHorizontally ? dx : 0, canScrollVertically ? dy : 0, vtev)) {
                getParent().requestDisallowInterceptTouchEvent(true);
            }
        }
    }
        break;

    case MotionEventCompat.ACTION_POINTER_UP: {
        onPointerUp(e);
    }
        break;

    case MotionEvent.ACTION_UP: {
        mVelocityTracker.addMovement(vtev);
        eventAddedToVelocityTracker = true;
        mVelocityTracker.computeCurrentVelocity(1000, mMaxFlingVelocity);
        final float xvel = canScrollHorizontally
                ? -VelocityTrackerCompat.getXVelocity(mVelocityTracker, mScrollPointerId)
                : 0;
        final float yvel = canScrollVertically
                ? -VelocityTrackerCompat.getYVelocity(mVelocityTracker, mScrollPointerId)
                : 0;
        if (!((xvel != 0 || yvel != 0) && fling((int) xvel, (int) yvel))) {
            setScrollState(SCROLL_STATE_IDLE);
        }
        resetTouch();
    }
        break;

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

    if (!eventAddedToVelocityTracker) {
        mVelocityTracker.addMovement(vtev);
    }
    vtev.recycle();

    return true;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »