Example usage for android.view MotionEvent findPointerIndex

List of usage examples for android.view MotionEvent findPointerIndex

  1. HOME
  2. Java
  3. android
  4. android.view.*
  5. MotionEvent
  6. findPointerIndex

Introduction

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

Prototype

public final int findPointerIndex(int pointerId)

Source Link

Document

Given a pointer identifier, find the index of its data in the event.

Usage

From source file:android.support.design.widget.HeaderBehavior.java

@Override
public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent ev) {
    if (mTouchSlop < 0) {
        mTouchSlop = ViewConfiguration.get(parent.getContext()).getScaledTouchSlop();
    }//w  w  w .  jav  a2s. com

    final int action = ev.getAction();

    // Shortcut since we're being dragged
    if (action == MotionEvent.ACTION_MOVE && mIsBeingDragged) {
        return true;
    }

    switch (MotionEventCompat.getActionMasked(ev)) {
    case MotionEvent.ACTION_DOWN: {
        mIsBeingDragged = false;
        final int x = (int) ev.getX();
        final int y = (int) ev.getY();
        if (canDragView(child) && parent.isPointInChildBounds(child, x, y)) {
            mLastMotionY = y;
            mActivePointerId = ev.getPointerId(0);
            ensureVelocityTracker();
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        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 = ev.findPointerIndex(activePointerId);
        if (pointerIndex == -1) {
            break;
        }

        final int y = (int) ev.getY(pointerIndex);
        final int yDiff = Math.abs(y - mLastMotionY);
        if (yDiff > mTouchSlop) {
            mIsBeingDragged = true;
            mLastMotionY = y;
        }
        break;
    }

    case MotionEvent.ACTION_CANCEL:
    case MotionEvent.ACTION_UP: {
        mIsBeingDragged = false;
        mActivePointerId = INVALID_POINTER;
        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
        break;
    }
    }

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

    return mIsBeingDragged;
}

From source file:com.lovejjfg.powerrefresh.PowerRefreshLayout.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    int pointerIndex;

    if (!isEnabled() || !canChildScrollUp() || isLoading || isRefreshing || mNestedScrollInProgress) {
        // Fail fast if we're not in a state where a swipe is possible
        return false;
    }//  w  w  w. j a va2s .c om

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mActivePointerId = ev.getPointerId(0);
        mIsBeingDragged = false;
        break;

    case MotionEvent.ACTION_MOVE: {
        pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            return false;
        }

        final float y = ev.getY(pointerIndex);
        startDragging(y);
        //in this case ,just can refresh.
        if (mIsBeingDragged) {
            final float overscrollTop = (y - mInitialMotionY);
            if (overscrollTop < 0 && getScrollY() > 0) {
                ev.setAction(MotionEvent.ACTION_CANCEL);
                return false;
            }
            currentStatus = STATE_REFRESH;
            goToRefresh((int) overscrollTop);
        }
        mInitialMotionY = y;
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        pointerIndex = MotionEventCompat.getActionIndex(ev);
        if (pointerIndex < 0) {
            return false;
        }
        mActivePointerId = ev.getPointerId(pointerIndex);
        break;
    }

    //            case MotionEventCompat.ACTION_POINTER_UP:
    //                onSecondaryPointerUp(ev);
    //                break;

    case MotionEvent.ACTION_UP: {
        pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            return false;
        }

        if (mIsBeingDragged) {
            mIsBeingDragged = false;
            resetScroll();
        }
        mActivePointerId = INVALID_POINTER;
        return false;
    }
    case MotionEvent.ACTION_CANCEL:
        resetScroll();
        return false;
    }

    return true;
}

From source file:com.shizhefei.view.coolrefreshview.CoolRefreshView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {

    final int action = MotionEventCompat.getActionMasked(ev);
    int pointerIndex;

    if (!isEnabled() || canChildScrollUp() || mRefreshing || mNestedScrollInProgress) {
        // Fail fast if we're not in a state where a swipe is possible
        return false;
    }//from w ww.  java  2s.c o m

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        //                setTargetOffsetTopAndBottom(mOriginalOffsetTop - mCircleView.getTop(), true);
        mActivePointerId = ev.getPointerId(0);
        mIsBeingDragged = false;

        pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            return false;
        }
        mInitialDownY = ev.getY(pointerIndex);
        mLastMotionY = getMotionEventY(ev, pointerIndex);
        break;

    case MotionEvent.ACTION_MOVE:
        if (mActivePointerId == INVALID_POINTER) {
            Log.e(LOG_TAG, "Got ACTION_MOVE event but don't have an active pointer id.");
            return false;
        }

        pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            return false;
        }
        final float y = ev.getY(pointerIndex);
        startDragging(y);
        break;

    case MotionEventCompat.ACTION_POINTER_UP:
        onSecondaryPointerUp(ev);
        break;

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL:
        mIsBeingDragged = false;
        mActivePointerId = INVALID_POINTER;
        break;
    }

    return mIsBeingDragged;
}

From source file:com.klinker.deskclock.widget.multiwaveview.GlowPadView.java

private void handleMove(MotionEvent event) {
    int activeTarget = -1;
    final int historySize = event.getHistorySize();
    ArrayList<TargetDrawable> targets = mTargetDrawables;
    int ntargets = targets.size();
    float x = 0.0f;
    float y = 0.0f;
    int actionIndex = event.findPointerIndex(mPointerId);

    if (actionIndex == -1) {
        return; // no data for this pointer
    }//from  ww  w .j av  a 2  s .  com

    for (int k = 0; k < historySize + 1; k++) {
        float eventX = k < historySize ? event.getHistoricalX(actionIndex, k) : event.getX(actionIndex);
        float eventY = k < historySize ? event.getHistoricalY(actionIndex, k) : event.getY(actionIndex);
        // tx and ty are relative to wave center
        float tx = eventX - mWaveCenterX;
        float ty = eventY - mWaveCenterY;
        float touchRadius = (float) Math.sqrt(dist2(tx, ty));
        final float scale = touchRadius > mOuterRadius ? mOuterRadius / touchRadius : 1.0f;
        float limitX = tx * scale;
        float limitY = ty * scale;
        double angleRad = Math.atan2(-ty, tx);

        if (!mDragging) {
            trySwitchToFirstTouchState(eventX, eventY);
        }

        if (mDragging) {
            // For multiple targets, snap to the one that matches
            final float snapRadius = mOuterRadius - mSnapMargin;
            final float snapDistance2 = snapRadius * snapRadius;
            // Find first target in range
            for (int i = 0; i < ntargets; i++) {
                TargetDrawable target = targets.get(i);

                double targetMinRad = (i - 0.5) * 2 * Math.PI / ntargets;
                double targetMaxRad = (i + 0.5) * 2 * Math.PI / ntargets;
                if (target.isEnabled()) {
                    boolean angleMatches = (angleRad > targetMinRad && angleRad <= targetMaxRad)
                            || (angleRad + 2 * Math.PI > targetMinRad
                                    && angleRad + 2 * Math.PI <= targetMaxRad);
                    if (angleMatches && (dist2(tx, ty) > snapDistance2)) {
                        activeTarget = i;
                    }
                }
            }
        }
        x = limitX;
        y = limitY;
    }

    if (!mDragging) {
        return;
    }

    if (activeTarget != -1) {
        switchToState(STATE_SNAP, x, y);
        updateGlowPosition(x, y);
    } else {
        switchToState(STATE_TRACKING, x, y);
        updateGlowPosition(x, y);
    }

    if (mActiveTarget != activeTarget) {
        // Defocus the old target
        if (mActiveTarget != -1) {
            TargetDrawable target = targets.get(mActiveTarget);
            target.setState(TargetDrawable.STATE_INACTIVE);
        }
        // Focus the new target
        if (activeTarget != -1) {
            TargetDrawable target = targets.get(activeTarget);
            target.setState(TargetDrawable.STATE_FOCUSED);
            final AccessibilityManager accessibilityManager = (AccessibilityManager) getContext()
                    .getSystemService(Context.ACCESSIBILITY_SERVICE);
            if (accessibilityManager.isEnabled()) {
                String targetContentDescription = getTargetDescription(activeTarget);
                if (Build.VERSION.SDK_INT >= 16) {
                    announceForAccessibility(targetContentDescription);
                } else {
                    AccessibilityEvent acc_event = AccessibilityEvent
                            .obtain(AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
                    AccessibilityRecordCompat arc = new AccessibilityRecordCompat(acc_event);
                    arc.setSource(this);
                    acc_event.setClassName(this.getClass().getName());
                    acc_event.setPackageName(this.getContext().getPackageName());
                    acc_event.setEnabled(this.isEnabled());
                    acc_event.getText().add(targetContentDescription);
                    accessibilityManager.sendAccessibilityEvent(acc_event);
                }
            }
        }
    }
    mActiveTarget = activeTarget;
}

From source file:com.shizhefei.view.coolrefreshview.CoolRefreshView.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    int pointerIndex = -1;

    if (!isEnabled() || canChildScrollUp() || mRefreshing || mNestedScrollInProgress) {
        // Fail fast if we're not in a state where a swipe is possible
        return false;
    }/*from   w w  w. ja  v a2  s  . c o  m*/

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mActivePointerId = ev.getPointerId(0);
        mIsBeingDragged = false;
        mLastMotionY = getMotionEventY(ev, mActivePointerId);
        break;

    case MotionEvent.ACTION_MOVE: {
        pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            Log.e(LOG_TAG, "Got ACTION_MOVE event but have an invalid active pointer id.");
            return false;
        }

        final float y = ev.getY(pointerIndex);
        startDragging(y);

        if (mIsBeingDragged) {
            float dy = mLastMotionY - y;
            touchMove((int) dy);
            mLastMotionY = y;
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        pointerIndex = MotionEventCompat.getActionIndex(ev);
        if (pointerIndex < 0) {
            Log.e(LOG_TAG, "Got ACTION_POINTER_DOWN event but have an invalid action index.");
            return false;
        }
        mActivePointerId = ev.getPointerId(pointerIndex);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP:
        onSecondaryPointerUp(ev);
        break;

    case MotionEvent.ACTION_UP: {
        pointerIndex = ev.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            Log.e(LOG_TAG, "Got ACTION_UP event but don't have an active pointer id.");
            return false;
        }

        if (mIsBeingDragged) {
            //                    final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
            mIsBeingDragged = false;
            finishSpinner();
        }
        mActivePointerId = INVALID_POINTER;
        return false;
    }
    case MotionEvent.ACTION_CANCEL:
        return false;
    }

    return true;
}

From source file:com.gu.swiperefresh.SwipeRefreshPlush.java

@Override
public boolean onTouchEvent(MotionEvent event) {
    final int action = MotionEventCompat.getActionMasked(event);
    int pointerIndex;
    if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
        mReturningToStart = false;/*  w  w w.  j av  a2  s. com*/
    }

    if (!isEnabled() || mReturningToStart || mRefreshController.isRefresh() || mNestedScrollInProgress) {
        // Fail fast if we're not in a state where a swipe is possible
        return false;
    }
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mIsBeingDragUp = false;
        mIsBeingDragDown = false;
        mActivePointerId = event.getPointerId(0);
        pointerIndex = event.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            return false;
        }
        mInitialDownY = event.getY(pointerIndex);
        mLastY = mInitialDownY;
        return false;
    case MotionEvent.ACTION_CANCEL:
        return false;
    case MotionEvent.ACTION_MOVE: {
        pointerIndex = event.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            // Log.e(LOG_TAG, "Got ACTION_MOVE event but have an invalid active pointer id.");
            return false;
        }

        final float y = event.getY(pointerIndex);
        startDragging(y);

        if (mIsBeingDragUp) {
            final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
            if (overscrollTop > 0) {
                mRefreshController.showPullRefresh(overscrollTop);
            }

        } else if (mIsBeingDragDown) {
            int dy = (int) (y - mLastY);
            Log.i(TAG, "lasty:" + mLastY);
            Log.i(TAG, "dy:" + dy);
            //
            if (dy >= 0.5) {
                hideLoadMoreView(Math.abs(dy));
            } else if (dy < -0.5) {
                showLoadMoreView(Math.abs(dy));
            }
        }
        mLastY = y;
        break;
    }
    case MotionEvent.ACTION_UP: {
        pointerIndex = event.findPointerIndex(mActivePointerId);
        if (pointerIndex < 0) {
            //  Log.e(LOG_TAG, "Got ACTION_UP event but don't have an active pointer id.");
            return false;
        }

        if (mIsBeingDragUp) {
            final float y = event.getY(pointerIndex);
            final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
            mIsBeingDragUp = false;
            if (overscrollTop > 0)
                mRefreshController.finishPullRefresh(overscrollTop);
        }
        if (mIsBeingDragDown) {
            final float y = event.getY(pointerIndex);
            final float overscrollBottom = (y - mInitialMotionY);
            mIsBeingDragDown = false;
            if (overscrollBottom < 0)
                mLoadViewController.finishPullRefresh(Math.abs(overscrollBottom));
        }
        mActivePointerId = INVALID_POINTER;
        return false;
    }
    }
    return true;
}

From source file:com.tasomaniac.openwith.resolver.ResolverDrawerLayout.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);

    mVelocityTracker.addMovement(ev);//www .j  a  va2s  .  c  om

    boolean handled = false;
    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX(0);
        final float y = ev.getY(0);
        mInitialTouchX = x;
        mInitialTouchY = mLastTouchY = y;
        mActivePointerId = ev.getPointerId(0);
        final boolean hitView = findChildUnder(mInitialTouchX, mInitialTouchY) != null;
        handled = (!hitView && mOnDismissedListener != null) || mCollapsibleHeight > 0;
        mIsDragging = hitView && handled;
        abortAnimation();
    }
        break;

    case MotionEvent.ACTION_MOVE: {
        int index = ev.findPointerIndex(mActivePointerId);
        if (index < 0) {
            Timber.e("Bad pointer id %d, resetting", mActivePointerId);
            index = 0;
            mActivePointerId = ev.getPointerId(0);
            mInitialTouchX = ev.getX(0);
            mInitialTouchY = mLastTouchY = ev.getY(0);
        }
        final float x = ev.getX(index);
        final float y = ev.getY(index);
        if (!mIsDragging) {
            final float dy = y - mInitialTouchY;
            if (Math.abs(dy) > mTouchSlop && findChildUnder(x, y) != null) {
                handled = mIsDragging = true;
                mLastTouchY = Math.max(mLastTouchY - mTouchSlop,
                        Math.min(mLastTouchY + dy, mLastTouchY + mTouchSlop));
            }
        }
        if (mIsDragging) {
            final float dy = y - mLastTouchY;
            performDrag(dy);
        }
        mLastTouchY = y;
    }
        break;

    case MotionEvent.ACTION_POINTER_DOWN: {
        final int pointerIndex = MotionEventCompat.getActionIndex(ev);

        mActivePointerId = ev.getPointerId(pointerIndex);
        mInitialTouchX = ev.getX(pointerIndex);
        mInitialTouchY = mLastTouchY = ev.getY(pointerIndex);
    }
        break;

    case MotionEvent.ACTION_POINTER_UP: {
        onSecondaryPointerUp(ev);
    }
        break;

    case MotionEvent.ACTION_UP: {
        final boolean wasDragging = mIsDragging;
        mIsDragging = false;
        if (!wasDragging && findChildUnder(mInitialTouchX, mInitialTouchY) == null
                && findChildUnder(ev.getX(0), ev.getY(0)) == null) {
            if (mOnDismissedListener != null) {
                dispatchOnDismissed();
                resetTouch();
                return true;
            }
        }
        if (mOpenOnClick && Math.abs(ev.getX(0) - mInitialTouchX) < mTouchSlop
                && Math.abs(ev.getY(0) - mInitialTouchY) < mTouchSlop) {
            smoothScrollTo(0, 0);
            return true;
        }
        mVelocityTracker.computeCurrentVelocity(1000);
        final float yvel = VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId);
        if (Math.abs(yvel) > mMinFlingVelocity) {
            if (mOnDismissedListener != null && yvel > 0 && mCollapseOffset > mCollapsibleHeight) {
                smoothScrollTo(mCollapsibleHeight + mUncollapsibleHeight, yvel);
                mDismissOnScrollerFinished = true;
            } else {
                smoothScrollTo(yvel < 0 ? 0 : mCollapsibleHeight, yvel);
            }
        } else {
            smoothScrollTo(mCollapseOffset < mCollapsibleHeight / 2 ? 0 : mCollapsibleHeight, 0);
        }
        resetTouch();
    }
        break;

    case MotionEvent.ACTION_CANCEL: {
        if (mIsDragging) {
            smoothScrollTo(mCollapseOffset < mCollapsibleHeight / 2 ? 0 : mCollapsibleHeight, 0);
        }
        resetTouch();
        return true;
    }
    }

    return handled;
}

From source file:study.com.s_sxl.carelib.pullRefreshView.layout.FlingLayout.java

/******************************************************************/

@Override/*from  w w w.ja v a2  s.  c om*/
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (mPullView != null && !ViewCompat.isNestedScrollingEnabled(mPullView)) {
        float moveY = getMoveY();
        int pointerCount = ev.getPointerCount();
        int pointerIndex = ev.getActionIndex();
        if (!mScroller.isFinished()) {
            mScroller.abortAnimation();
        }
        switch (ev.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            mPointerId = ev.getPointerId(pointerIndex);
            float x = ev.getX(pointerIndex);
            float y = ev.getY(pointerIndex);
            tempY = downY = y;
            tempX = downX = x;
            tempStateType = SCROLL_STATE_TOUCH_SCROLL;
            if (moveY != 0) {
                return true;
            }
            break;
        case MotionEvent.ACTION_POINTER_DOWN:
            mPointerId = ev.getPointerId(pointerIndex);
            tempX = ev.getX(pointerIndex);
            tempY = ev.getY(pointerIndex);
            break;
        case MotionEvent.ACTION_MOVE:
            pointerIndex = ev.findPointerIndex(mPointerId);
            float mx;
            float my;
            if (pointerCount > pointerIndex && pointerIndex >= 0) {
                mx = ev.getX(pointerIndex);
                my = ev.getY(pointerIndex);
            } else {
                mx = ev.getX();
                my = ev.getY();
            }
            //?????
            int dataX = (int) (mx - tempX);
            int dataY = (int) (my - tempY);
            tempX = mx;
            tempY = my;
            if (isScrolling || (Math.abs(dataY) > Math.abs(dataX))) {
                isScrolling = true;
                if (moveY == 0) {
                    // 0,0
                    //??
                    if ((dataY < 0 && canPullUp()) || (dataY > 0 && canPullDown())) {
                        moveBy(dataY);
                        return true;
                    }
                } else {
                    //?0,0
                    ev.setAction(MotionEvent.ACTION_CANCEL);//?

                    if ((moveY < 0 && moveY + dataY >= 0) || (moveY > 0 && moveY + dataY <= 0)) {
                        //0,0
                        ev.setAction(MotionEvent.ACTION_DOWN);
                        moveTo(0);
                    } else if ((moveY > 0 && dataY > 0) || (moveY < 0 && dataY < 0)) {
                        //??
                        if (maxDistance == 0 || Math.abs(moveY) < maxDistance) {
                            int ps = 0;
                            int hDataY = dataY / 2;
                            if (maxDistance == 0) {
                                ps = (int) (-hDataY * Math.abs(moveY) / (float) MAXDISTANCE) - hDataY;
                            } else {
                                ps = (int) (-hDataY * Math.abs(moveY) / (float) maxDistance) - hDataY;
                            }
                            moveBy(ps + dataY);
                        } else if (moveY > maxDistance) {
                            moveTo(maxDistance);
                        } else if (moveY < -maxDistance) {
                            moveTo(-maxDistance);
                        }
                    } else {
                        moveBy(dataY);
                    }
                }
            } else {
                ev.setLocation(mx, downY);
            }
            break;
        case MotionEvent.ACTION_CANCEL:
        case MotionEvent.ACTION_UP:
            startFling();
            isScrolling = false;
            break;
        case MotionEvent.ACTION_POINTER_UP:
            // ??
            int pointerIdLeave = ev.getPointerId(pointerIndex);
            if (mPointerId == pointerIdLeave) {
                // ??????VelocityTracker
                int reIndex = pointerIndex == 0 ? 1 : 0;
                mPointerId = ev.getPointerId(reIndex);
                // ?
                tempY = ev.getY(reIndex);
            }
        }
        return super.dispatchTouchEvent(ev) || isScrolling;
    } else {
        return super.dispatchTouchEvent(ev);
    }

}

From source file:com.leap.mini.widget.pullrefresh.base.layout.FlingLayout.java

/******************************************************************/

@Override//from   w  w w  . j  ava2s .  c  o m
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (mPullView != null && !ViewCompat.isNestedScrollingEnabled(mPullView)) {
        float moveY = getMoveY();
        int pointerCount = ev.getPointerCount();
        int pointerIndex = ev.getActionIndex();
        if (!mScroller.isFinished()) {
            mScroller.abortAnimation();
        }
        switch (ev.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            mPointerId = ev.getPointerId(pointerIndex);
            float x = ev.getX(pointerIndex);
            float y = ev.getY(pointerIndex);
            tepmY = downY = y;
            tepmX = downX = x;
            tempStateType = SCROLL_STATE_TOUCH_SCROLL;
            if (moveY != 0) {
                return true;
            }
            break;
        case MotionEvent.ACTION_POINTER_DOWN:
            mPointerId = ev.getPointerId(pointerIndex);
            tepmX = ev.getX(pointerIndex);
            tepmY = ev.getY(pointerIndex);
            break;
        case MotionEvent.ACTION_MOVE:
            pointerIndex = ev.findPointerIndex(mPointerId);
            float mx;
            float my;
            if (pointerCount > pointerIndex && pointerIndex >= 0) {
                mx = ev.getX(pointerIndex);
                my = ev.getY(pointerIndex);
            } else {
                mx = ev.getX();
                my = ev.getY();
            }
            // ?????
            int dataX = (int) (mx - tepmX);
            int dataY = (int) (my - tepmY);
            tepmX = mx;
            tepmY = my;
            if (isScrolling || (Math.abs(dataY) > Math.abs(dataX))) {
                isScrolling = true;
                if (moveY == 0) {
                    //  0,0
                    // ??
                    if ((dataY < 0 && canPullUp()) || (dataY > 0 && canPullDown())) {
                        moveBy(dataY);
                        return true;
                    }
                } else {
                    // ?0,0
                    ev.setAction(MotionEvent.ACTION_CANCEL);// ?

                    if ((moveY < 0 && moveY + dataY >= 0) || (moveY > 0 && moveY + dataY <= 0)) {
                        // 0,0
                        ev.setAction(MotionEvent.ACTION_DOWN);
                        moveTo(0);
                    } else if ((moveY > 0 && dataY > 0) || (moveY < 0 && dataY < 0)) {
                        // ??
                        if (maxDistance == 0 || Math.abs(moveY) < maxDistance) {
                            int ps = 0;
                            int hDataY = dataY / 2;
                            if (maxDistance == 0) {
                                ps = (int) (-hDataY * Math.abs(moveY) / (float) MAXDISTANCE) - hDataY;
                            } else {
                                ps = (int) (-hDataY * Math.abs(moveY) / (float) maxDistance) - hDataY;
                            }
                            moveBy(ps + dataY);
                        } else if (moveY > maxDistance) {
                            moveTo(maxDistance);
                        } else if (moveY < -maxDistance) {
                            moveTo(-maxDistance);
                        }
                    } else {
                        moveBy(dataY);
                    }
                }
            } else {
                ev.setLocation(mx, downY);
            }
            break;
        case MotionEvent.ACTION_CANCEL:
        case MotionEvent.ACTION_UP:
            startFling();
            isScrolling = false;
            break;
        case MotionEvent.ACTION_POINTER_UP:
            // ??
            int pointerIdLeave = ev.getPointerId(pointerIndex);
            if (mPointerId == pointerIdLeave) {
                // ??????VelocityTracker
                int reIndex = pointerIndex == 0 ? 1 : 0;
                mPointerId = ev.getPointerId(reIndex);
                // ?
                tepmY = ev.getY(reIndex);
            }
        }
        return super.dispatchTouchEvent(ev) || isScrolling;
    } else {
        return super.dispatchTouchEvent(ev);
    }

}

From source file:com.ybao.pullrefreshview.layout.FlingLayout.java

/******************************************************************/

@Override/* ww w  .  ja va  2s .  co  m*/
public boolean dispatchTouchEvent(MotionEvent ev) {
    if (mPullView != null && !ViewCompat.isNestedScrollingEnabled(mPullView)) {
        float moveY = getMoveY();
        int pointerCount = ev.getPointerCount();
        int pointerIndex = ev.getActionIndex();
        if (!mScroller.isFinished()) {
            mScroller.abortAnimation();
        }
        switch (ev.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            mPointerId = ev.getPointerId(pointerIndex);
            float x = ev.getX(pointerIndex);
            float y = ev.getY(pointerIndex);
            tepmY = downY = y;
            tepmX = downX = x;
            tempStateType = SCROLL_STATE_TOUCH_SCROLL;
            if (moveY != 0) {
                return true;
            }
            break;
        case MotionEvent.ACTION_POINTER_DOWN:
            mPointerId = ev.getPointerId(pointerIndex);
            tepmX = ev.getX(pointerIndex);
            tepmY = ev.getY(pointerIndex);
            break;
        case MotionEvent.ACTION_MOVE:
            pointerIndex = ev.findPointerIndex(mPointerId);
            float mx;
            float my;
            if (pointerCount > pointerIndex && pointerIndex >= 0) {
                mx = ev.getX(pointerIndex);
                my = ev.getY(pointerIndex);
            } else {
                mx = ev.getX();
                my = ev.getY();
            }
            //?????
            int dataX = (int) (mx - tepmX);
            int dataY = (int) (my - tepmY);
            tepmX = mx;
            tepmY = my;
            if (isScrolling || (Math.abs(dataY) > Math.abs(dataX))) {
                isScrolling = true;
                if (moveY == 0) {
                    // 0,0
                    //??
                    if ((dataY < 0 && canPullUp()) || (dataY > 0 && canPullDown())) {
                        moveBy(dataY);
                        return true;
                    }
                } else {
                    //?0,0
                    ev.setAction(MotionEvent.ACTION_CANCEL);//?

                    if ((moveY < 0 && moveY + dataY >= 0) || (moveY > 0 && moveY + dataY <= 0)) {
                        //0,0
                        ev.setAction(MotionEvent.ACTION_DOWN);
                        moveTo(0);
                    } else if ((moveY > 0 && dataY > 0) || (moveY < 0 && dataY < 0)) {
                        //??
                        if (maxDistance == 0 || Math.abs(moveY) < maxDistance) {
                            int ps = 0;
                            int hDataY = dataY / 2;
                            if (maxDistance == 0) {
                                ps = (int) (-hDataY * Math.abs(moveY) / (float) MAXDISTANCE) - hDataY;
                            } else {
                                ps = (int) (-hDataY * Math.abs(moveY) / (float) maxDistance) - hDataY;
                            }
                            moveBy(ps + dataY);
                        } else if (moveY > maxDistance) {
                            moveTo(maxDistance);
                        } else if (moveY < -maxDistance) {
                            moveTo(-maxDistance);
                        }
                    } else {
                        moveBy(dataY);
                    }
                }
            } else {
                ev.setLocation(mx, downY);
            }
            break;
        case MotionEvent.ACTION_CANCEL:
        case MotionEvent.ACTION_UP:
            startFling();
            isScrolling = false;
            break;
        case MotionEvent.ACTION_POINTER_UP:
            // ??
            int pointerIdLeave = ev.getPointerId(pointerIndex);
            if (mPointerId == pointerIdLeave) {
                // ??????VelocityTracker
                int reIndex = pointerIndex == 0 ? 1 : 0;
                mPointerId = ev.getPointerId(reIndex);
                // ?
                tepmY = ev.getY(reIndex);
            }
        }
        return super.dispatchTouchEvent(ev) || isScrolling;
    } else {
        return super.dispatchTouchEvent(ev);
    }

}