Example usage for android.support.v4.view MotionEventCompat getPointerId

List of usage examples for android.support.v4.view MotionEventCompat getPointerId

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Introduction

In this page you can find the example usage for android.support.v4.view MotionEventCompat getPointerId.

Prototype

public static int getPointerId(MotionEvent event, int pointerIndex)

Source Link

Document

Call MotionEvent#getPointerId(int) .

Usage

From source file:com.ayuget.redface.ui.activity.ReplyActivity.java

/**
 * Initializes both the smiley selector//from www. ja va  2s. c  om
 */
protected void setupSmileySelector() {
    smileyList.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            final int action = MotionEventCompat.getActionMasked(event);

            switch (action) {
            case MotionEvent.ACTION_DOWN: {
                final int pointerIndex = MotionEventCompat.getActionIndex(event);
                lastTouchY = MotionEventCompat.getY(event, pointerIndex);
                activePointerId = MotionEventCompat.getPointerId(event, 0);
                break;
            }
            case MotionEvent.ACTION_MOVE: {
                if (smileyList.getScrollY() == 0) {
                    final int pointerIndex = MotionEventCompat.findPointerIndex(event, activePointerId);

                    if (pointerIndex != -1) {
                        final float y = MotionEventCompat.getY(event, pointerIndex);

                        // Distance
                        float dy = y - lastTouchY;
                        isUpwardMovement = dy < 0;
                        float targetY = smileysSelector.getY() + dy;

                        if (targetY < toolbarHeight) {
                            float difference = toolbarHeight - targetY;
                            dy += difference;
                        } else if (targetY > smileySelectorTopOffset) {
                            float difference = targetY - smileySelectorTopOffset;
                            dy -= difference;
                        }

                        smileysSelector.setY(smileysSelector.getY() + dy);

                        // Show or hide the smileys toolbar based on current position
                        if (isUpwardMovement && smileysSelector.getY() < replyWindowMaxHeight) {
                            showSmileysToolbar();
                        } else {
                            hideSmileysToolbar();
                        }
                    }

                    break;
                }
            }
            case MotionEvent.ACTION_UP: {
                int upAnimationThreshold = replyWindowMaxHeight - toolbarHeight;

                float yTranslation;
                ViewPropertyAnimator viewPropertyAnimator = smileysSelector.animate();

                if (isUpwardMovement && smileysSelector.getY() == upAnimationThreshold) {
                    // Do not move in that case
                    yTranslation = 0;
                } else if (isUpwardMovement && smileysSelector.getY() < upAnimationThreshold) {
                    // Moving too far, let's avoid this
                    yTranslation = -(smileysSelector.getY() - toolbarHeight);
                } else {
                    // Replace the smiley selector at its original position
                    yTranslation = smileySelectorTopOffset - smileysSelector.getY();
                }

                if (yTranslation != 0) {
                    viewPropertyAnimator.translationYBy(yTranslation).setDuration(150).start();
                }

                break;
            }
            }

            boolean touchConsumed;
            if (smileysSelector.getY() != smileySelectorTopOffset) {
                touchConsumed = (smileysSelector.getY() != toolbarHeight);
            } else {
                touchConsumed = false;
            }

            return touchConsumed;
        }
    });
}

From source file:com.app.afteryou.ui.staggered.StaggeredGridView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    mVelocityTracker.addMovement(ev);//from   w  w  w  . j a va2  s.co  m
    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mVelocityTracker.clear();
        mScroller.abortAnimation();
        mLastTouchY = ev.getY();
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mTouchRemainderY = 0;
        if (mTouchMode == TOUCH_MODE_FLINGING) {
            // Catch!
            setTouchMode(TOUCH_MODE_DRAGGING);
            return true;
        }
        break;

    case MotionEvent.ACTION_MOVE: {
        final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        if (index < 0) {
            Log.e(TAG, "onInterceptTouchEvent could not find pointer with id " + mActivePointerId
                    + " - did StaggeredGridView receive an inconsistent " + "event stream?");
            return false;
        }
        final float y = MotionEventCompat.getY(ev, index);
        final float dy = y - mLastTouchY + mTouchRemainderY;
        final int deltaY = (int) dy;
        mTouchRemainderY = dy - deltaY;

        if (Math.abs(dy) > mTouchSlop) {
            setTouchMode(TOUCH_MODE_DRAGGING);
            return true;
        }
    }
    }

    return false;
}

From source file:com.coco.slidinguppanel.SlidingUpPanel.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (getState() == STATE_OPENED) {
        // disable touch handle when in opened state.
        return false;
    }/*from   ww  w . j av a2s  .com*/

    final int action = MotionEventCompat.getActionMasked(ev);

    if (action == MotionEvent.ACTION_DOWN && ev.getEdgeFlags() != 0) {
        // Don't handle edge touches immediately -- they may actually belong to one of our descendants.
        return false;
    }

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

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        onTouchDown(ev, false);
        DEBUG_LOG("Down at " + mLastMotionX + "," + mLastMotionY + " mIsBeingDragged=" + mIsBeingDragged
                + " mIsUnableToDrag=" + mIsUnableToDrag);
        break;
    }
    case MotionEvent.ACTION_MOVE: {
        final int activePointerId = mActivePointerId;
        if (activePointerId == INVALID_POINTER || mIsUnableToDrag) {
            // 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);
        final float y = MotionEventCompat.getY(ev, pointerIndex);
        final float xDiff = Math.abs(x - mInitialMotionX);
        final float yDiff = Math.abs(y - mInitialMotionY);
        DEBUG_LOG("Moved to " + x + "," + y + " diff=" + xDiff + "," + yDiff);
        onTouchMove(x, y, xDiff, yDiff, false);
        break;
    }
    case MotionEvent.ACTION_UP: {
        if (mIsBeingDragged) {
            final VelocityTracker velocityTracker = mVelocityTracker;
            velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
            final int initialVelocity = (int) VelocityTrackerCompat.getYVelocity(velocityTracker,
                    mActivePointerId);
            final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
            final float y = MotionEventCompat.getY(ev, pointerIndex);
            final int totalDelta = (int) (y - mInitialMotionY);
            boolean toOpen = determineToOpen(initialVelocity, totalDelta);
            startFling(toOpen, initialVelocity);
            endDrag();
        }
        DEBUG_LOG("Touch up!!!");
        break;
    }
    case MotionEvent.ACTION_CANCEL: {
        if (mIsBeingDragged) {
            startFling(isOpen(), 0);
            endDrag();
        }
        DEBUG_LOG("Touch cancel!!!");
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerIndex = MotionEventCompat.getActionIndex(ev);
        final float x = MotionEventCompat.getX(ev, pointerIndex);
        final float y = MotionEventCompat.getY(ev, pointerIndex);
        mLastMotionX = x;
        mLastMotionY = y;
        mActivePointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
        break;
    }
    case MotionEvent.ACTION_POINTER_UP:
        onTouchPointerUp(ev);
        break;
    }

    return true;
}

From source file:com.android.backups.BackupStaggeredGridView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    mVelocityTracker.addMovement(ev);//from ww  w . ja v  a  2 s . c om
    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mVelocityTracker.clear();
        mScroller.abortAnimation();
        mLastTouchY = ev.getY();
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mTouchRemainderY = 0;
        if (mTouchMode == TOUCH_MODE_FLINGING) {
            // Catch!
            mTouchMode = TOUCH_MODE_DRAGGING;
            setTouchMode(mTouchMode);
            return true;
        }
        break;

    case MotionEvent.ACTION_MOVE: {
        final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        if (index < 0) {
            Log.e(TAG, "onInterceptTouchEvent could not find pointer with id " + mActivePointerId
                    + " - did StaggeredGridView receive an inconsistent " + "event stream?");
            return false;
        }
        final float y = MotionEventCompat.getY(ev, index);
        final float dy = y - mLastTouchY + mTouchRemainderY;
        final int deltaY = (int) dy;
        mTouchRemainderY = dy - deltaY;

        if (Math.abs(dy) > mTouchSlop) {
            mTouchMode = TOUCH_MODE_DRAGGING;
            setTouchMode(mTouchMode);
            return true;
        }
    }
    }

    return false;
}

From source file:com.conduit.plastic.widget.NestedWebView.java

private void onSecondaryPointerUp(MotionEvent ev) {
    final int pointerIndex = (ev.getAction()
            & MotionEventCompat.ACTION_POINTER_INDEX_MASK) >> MotionEventCompat.ACTION_POINTER_INDEX_SHIFT;
    final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
    if (pointerId == mActivePointerId) {
        // This was our active pointer going up. Choose getDirection new
        // active pointer and adjust accordingly.
        // TODO: Make this decision more intelligent.
        final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
        mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex);
        if (mVelocityTracker != null) {
            mVelocityTracker.clear();/*from  w  ww  .  j a  va2 s.  c  om*/
        }
    }
}

From source file:com.coco.slidinguppanel.SlidingUpPanel.java

private void onTouchDown(MotionEvent ev, boolean intercept) {
    // Remember location of down touch.
    // ACTION_DOWN always refers to pointer index 0.
    mLastMotionX = mInitialMotionX = ev.getX();
    mLastMotionY = mInitialMotionY = ev.getY();
    mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
    if (intercept) {
        mIsUnableToDrag = false;/*from  w  ww.  java 2  s  .c o  m*/
        mScroller.computeScrollOffset();
        if (getState() == STATE_FLING) {
            // Let the user 'catch' the pager as it animates.
            mScroller.abortAnimation();
            mIsBeingDragged = true;
            requestParentDisallowInterceptTouchEvent(true);
            setState(STATE_DRAGGING);
        } else {
            completeScroll(false);
            mIsBeingDragged = false;
        }
    } else {
        mScroller.abortAnimation();
    }
}

From source file:com.bolaa.medical.view.pulltorefreshgrid.StaggeredGridView.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    mVelocityTracker.addMovement(ev);/*from   w w w  . j av  a 2  s  .  co m*/
    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        LogUtil.d("--------------onInterceptTouchEvent ACTION_DOWN---------");
        mFirstDownY = ev.getRawY();

        mVelocityTracker.clear();
        mScroller.abortAnimation();
        mLastTouchY = ev.getY();
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mTouchRemainderY = 0;
        if (mTouchMode == TOUCH_MODE_FLINGING) {
            // Catch!
            mTouchMode = TOUCH_MODE_DRAGGING;
            reportScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL, getFirstVisiblePosition(),
                    getLastPosition());
            return true;
        }
        break;

    case MotionEvent.ACTION_MOVE: {
        final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        if (index < 0) {
            Log.e(TAG, "onInterceptTouchEvent could not find pointer with id " + mActivePointerId
                    + " - did StaggeredGridView receive an inconsistent " + "event stream?");
            return false;
        }
        final float y = MotionEventCompat.getY(ev, index);
        final float dy = y - mLastTouchY + mTouchRemainderY;
        final int deltaY = (int) dy;
        mTouchRemainderY = dy - deltaY;

        if (Math.abs(dy) > mTouchSlop) {
            mTouchMode = TOUCH_MODE_DRAGGING;
            reportScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL, getFirstVisiblePosition(),
                    getLastPosition());
            return true;
        }
    }
    }

    return false;
}

From source file:cn.iterlog.myapplication.widget.overscroll.StaggeredGridView.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    mVelocityTracker.addMovement(ev);//from  w w  w .  ja v a 2 s .c  o  m
    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;

    int motionPosition = pointToPosition((int) ev.getX(), (int) ev.getY());

    switch (action) {
    case MotionEvent.ACTION_DOWN:

        mVelocityTracker.clear();
        mScroller.abortAnimation();
        mLastTouchY = ev.getY();
        mLastTouchX = ev.getX();
        motionPosition = pointToPosition((int) mLastTouchX, (int) mLastTouchY);
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mTouchRemainderY = 0;

        if (mTouchMode != TOUCH_MODE_FLINGING && !mDataChanged && motionPosition >= 0 && mAdapter != null
                && mAdapter.isEnabled(motionPosition)) {
            mTouchMode = TOUCH_MODE_DOWN;

            mBeginClick = true;

            if (mPendingCheckForTap == null) {
                mPendingCheckForTap = new CheckForTap();
            }

            postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
        }

        mMotionPosition = motionPosition;
        invalidate();
        break;

    case MotionEvent.ACTION_MOVE: {

        final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        if (index < 0) {
            Log.e(TAG, "onInterceptTouchEvent could not find pointer with id " + mActivePointerId
                    + " - did StaggeredGridView receive an inconsistent " + "event stream?");
            return false;
        }
        final float y = MotionEventCompat.getY(ev, index);
        final float dy = y - mLastTouchY + mTouchRemainderY;
        final int deltaY = (int) dy;
        mTouchRemainderY = dy - deltaY;

        if (Math.abs(dy) > mTouchSlop) {
            mTouchMode = TOUCH_MODE_DRAGGING;
        }

        if (mTouchMode == TOUCH_MODE_DRAGGING) {
            mLastTouchY = y;

            if (!trackMotionScroll(deltaY, true)) {
                // Break fling velocity if we impacted an edge.
                mVelocityTracker.clear();
            }
        }

        updateSelectorState();
    }
        break;

    case MotionEvent.ACTION_CANCEL:
        mTouchMode = TOUCH_MODE_IDLE;
        updateSelectorState();
        setPressed(false);
        View motionView = this.getChildAt(mMotionPosition - mFirstPosition);
        if (motionView != null) {
            motionView.setPressed(false);
        }
        final Handler handler = getHandler();
        if (handler != null) {
            handler.removeCallbacks(mPendingCheckForLongPress);
        }

        if (mTopEdge != null) {
            mTopEdge.onRelease();
            mBottomEdge.onRelease();
        }

        mTouchMode = TOUCH_MODE_IDLE;
        break;

    case MotionEvent.ACTION_UP: {
        mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
        final float velocity = VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId);
        final int prevTouchMode = mTouchMode;

        if (Math.abs(velocity) > mFlingVelocity) { // TODO
            mTouchMode = TOUCH_MODE_FLINGING;
            mScroller.fling(0, 0, 0, (int) velocity, 0, 0, Integer.MIN_VALUE, Integer.MAX_VALUE);
            mLastTouchY = 0;
            invalidate();
        } else {
            mTouchMode = TOUCH_MODE_IDLE;
        }

        if (!mDataChanged && mAdapter != null && mAdapter.isEnabled(motionPosition)) {
            // TODO : handle
            mTouchMode = TOUCH_MODE_TAP;
        } else {
            mTouchMode = TOUCH_MODE_REST;
        }

        switch (prevTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            final View child = getChildAt(motionPosition - mFirstPosition);
            final float x = ev.getX();
            final boolean inList = x > getPaddingLeft() && x < getWidth() - getPaddingRight();
            if (child != null && !child.hasFocusable() && inList) {
                if (mTouchMode != TOUCH_MODE_DOWN) {
                    child.setPressed(false);
                }

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

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

                if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
                    final Handler handlerTouch = getHandler();
                    if (handlerTouch != null) {
                        handlerTouch.removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ? mPendingCheckForTap
                                : mPendingCheckForLongPress);
                    }

                    if (!mDataChanged && mAdapter != null && mAdapter.isEnabled(motionPosition)) {
                        mTouchMode = TOUCH_MODE_TAP;

                        layoutChildren(mDataChanged);
                        child.setPressed(true);
                        positionSelector(mMotionPosition, child);
                        setPressed(true);
                        if (mSelector != null) {
                            Drawable d = mSelector.getCurrent();
                            if (d != null && d instanceof TransitionDrawable) {
                                ((TransitionDrawable) d).resetTransition();
                            }
                        }
                        if (mTouchModeReset != null) {
                            removeCallbacks(mTouchModeReset);
                        }
                        mTouchModeReset = new Runnable() {
                            @Override
                            public void run() {
                                mTouchMode = TOUCH_MODE_REST;
                                child.setPressed(false);
                                setPressed(false);
                                if (!mDataChanged) {
                                    performClick.run();
                                }
                            }
                        };
                        postDelayed(mTouchModeReset, ViewConfiguration.getPressedStateDuration());

                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                    }
                    return true;
                } else if (!mDataChanged && mAdapter != null && mAdapter.isEnabled(motionPosition)) {
                    performClick.run();
                }
            }

            mTouchMode = TOUCH_MODE_REST;
        }

        mBeginClick = false;

        updateSelectorState();
    }
        break;
    }
    return true;
}

From source file:com.biznow.ordernow.fragments.StaggeredGridView.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    mVelocityTracker.addMovement(ev);/*from w ww  . ja  va2s . c  o  m*/
    final int action = ev.getAction() & MotionEventCompat.ACTION_MASK;

    int motionPosition = pointToPosition((int) ev.getX(), (int) ev.getY());

    switch (action) {
    case MotionEvent.ACTION_DOWN:

        mVelocityTracker.clear();
        mScroller.abortAnimation();
        mLastTouchY = ev.getY();
        mLastTouchX = ev.getX();
        motionPosition = pointToPosition((int) mLastTouchX, (int) mLastTouchY);
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mTouchRemainderY = 0;

        if (mTouchMode != TOUCH_MODE_FLINGING && !mDataChanged && motionPosition >= 0 && mAdapter != null
                && mAdapter.isEnabled(motionPosition)) {
            mTouchMode = TOUCH_MODE_DOWN;

            mBeginClick = true;

            if (mPendingCheckForTap == null) {
                mPendingCheckForTap = new CheckForTap();
            }

            postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
        }

        mMotionPosition = motionPosition;
        invalidate();
        break;

    case MotionEvent.ACTION_MOVE: {

        final int index = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        if (index < 0) {
            Utilities.error(TAG + "onInterceptTouchEvent could not find pointer with id " + mActivePointerId
                    + " - did StaggeredGridView receive an inconsistent " + "event stream?");
            return false;
        }
        final float y = MotionEventCompat.getY(ev, index);
        final float dy = y - mLastTouchY + mTouchRemainderY;
        final int deltaY = (int) dy;
        mTouchRemainderY = dy - deltaY;

        if (Math.abs(dy) > mTouchSlop) {
            mTouchMode = TOUCH_MODE_DRAGGING;
        }

        if (mTouchMode == TOUCH_MODE_DRAGGING) {
            mLastTouchY = y;

            if (!trackMotionScroll(deltaY, true)) {
                // Break fling velocity if we impacted an edge.
                mVelocityTracker.clear();
            }
        }

        updateSelectorState();
    }
        break;

    case MotionEvent.ACTION_CANCEL:
        mTouchMode = TOUCH_MODE_IDLE;
        updateSelectorState();
        setPressed(false);
        View motionView = this.getChildAt(mMotionPosition - mFirstPosition);
        if (motionView != null) {
            motionView.setPressed(false);
        }
        final Handler handler = getHandler();
        if (handler != null) {
            handler.removeCallbacks(mPendingCheckForLongPress);
        }

        if (mTopEdge != null) {
            mTopEdge.onRelease();
            mBottomEdge.onRelease();
        }

        mTouchMode = TOUCH_MODE_IDLE;
        break;

    case MotionEvent.ACTION_UP: {
        mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
        final float velocity = VelocityTrackerCompat.getYVelocity(mVelocityTracker, mActivePointerId);
        final int prevTouchMode = mTouchMode;

        if (Math.abs(velocity) > mFlingVelocity) { // TODO
            mTouchMode = TOUCH_MODE_FLINGING;
            mScroller.fling(0, 0, 0, (int) velocity, 0, 0, Integer.MIN_VALUE, Integer.MAX_VALUE);
            mLastTouchY = 0;
            invalidate();
        } else {
            mTouchMode = TOUCH_MODE_IDLE;
        }

        if (!mDataChanged && mAdapter != null && mAdapter.isEnabled(motionPosition)) {
            // TODO : handle
            mTouchMode = TOUCH_MODE_TAP;
        } else {
            mTouchMode = TOUCH_MODE_REST;
        }

        switch (prevTouchMode) {
        case TOUCH_MODE_DOWN:
        case TOUCH_MODE_TAP:
        case TOUCH_MODE_DONE_WAITING:
            final View child = getChildAt(motionPosition - mFirstPosition);
            final float x = ev.getX();
            final boolean inList = x > getPaddingLeft() && x < getWidth() - getPaddingRight();
            if (child != null && !child.hasFocusable() && inList) {
                if (mTouchMode != TOUCH_MODE_DOWN) {
                    child.setPressed(false);
                }

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

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

                if (mTouchMode == TOUCH_MODE_DOWN || mTouchMode == TOUCH_MODE_TAP) {
                    final Handler handlerTouch = getHandler();
                    if (handlerTouch != null) {
                        handlerTouch.removeCallbacks(mTouchMode == TOUCH_MODE_DOWN ? mPendingCheckForTap
                                : mPendingCheckForLongPress);
                    }

                    if (!mDataChanged && mAdapter != null && mAdapter.isEnabled(motionPosition)) {
                        mTouchMode = TOUCH_MODE_TAP;

                        layoutChildren(mDataChanged);
                        child.setPressed(true);
                        positionSelector(mMotionPosition, child);
                        setPressed(true);
                        if (mSelector != null) {
                            Drawable d = mSelector.getCurrent();
                            if (d != null && d instanceof TransitionDrawable) {
                                ((TransitionDrawable) d).resetTransition();
                            }
                        }
                        if (mTouchModeReset != null) {
                            removeCallbacks(mTouchModeReset);
                        }
                        mTouchModeReset = new Runnable() {
                            @Override
                            public void run() {
                                mTouchMode = TOUCH_MODE_REST;
                                child.setPressed(false);
                                setPressed(false);
                                if (!mDataChanged) {
                                    performClick.run();
                                }
                            }
                        };
                        postDelayed(mTouchModeReset, ViewConfiguration.getPressedStateDuration());

                    } else {
                        mTouchMode = TOUCH_MODE_REST;
                    }
                    return true;
                } else if (!mDataChanged && mAdapter != null && mAdapter.isEnabled(motionPosition)) {
                    performClick.run();
                }
            }

            mTouchMode = TOUCH_MODE_REST;
        }

        mBeginClick = false;

        updateSelectorState();
    }
        break;
    }
    return true;
}

From source file:com.hayukleung.app.view.refresh.SwipeRefreshLayout.java

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

    if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
        mReturningToStart = false;//  ww w  .  j  a va  2  s  .  c om
    }

    if (!isEnabled() || mReturningToStart || canChildScrollUp()) {
        // Fail fast if we're not in a state where a swipe is possible
        return false;
    }

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

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

        final float y = MotionEventCompat.getY(ev, pointerIndex);
        final float yDiff = y - mInitialMotionY;

        if (!mIsBeingDragged && yDiff > mTouchSlop) {
            mIsBeingDragged = true;
        }

        if (mIsBeingDragged) {
            // User velocity passed min velocity; trigger a refresh
            if (yDiff > mDistanceToTriggerSync) {
                // User movement passed distance; trigger a refresh
                mIsRefreshable = true;
            } else {
                // Just track the user's movement
                mIsRefreshable = false;
                if (mLastMotionY > y && mTarget.getTop() == getPaddingTop()) {
                    // If the user puts the view back at the top, we
                    // don't need to. This shouldn't be considered
                    // cancelling the gesture as the user can restart from the top.
                    removeCallbacks(mCancel);
                } else {
                    updatePositionTimeout();
                }
            }
            float diff = Math.min(yDiff, mDistanceToTriggerSync);
            setTriggerPercentage(mAccelerateInterpolator.getInterpolation(diff / mDistanceToTriggerSync));
            updateContentOffsetTop((int) (yDiff));
            mLastMotionY = y;
        }
        break;

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

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

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL:
        if (mIsRefreshable) {
            startRefresh();
        }
        mIsRefreshable = false;
        mIsBeingDragged = false;
        mCurrPercentage = 0;
        mActivePointerId = INVALID_POINTER;
        mCancel.run();
        return false;
    }

    return true;
}