Example usage for android.view MotionEvent ACTION_CANCEL

Introduction

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

Prototype

int ACTION_CANCEL

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

Click Source Link

Document

Constant for #getActionMasked : The current gesture has been aborted.

Usage

From source file:cn.zmdx.kaka.locker.widget.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's
 * onInterceptTouchEvent should cause the parent to intercept the touch
 * event stream.//w w  w. j  ava 2s .  co m
 * 
 * @param ev MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from
 *         onInterceptTouchEvent
 */
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();
    }

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

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
            tryCaptureViewForDrag(toCapture, pointerId);
        }

        final int edgesTouched = mInitialEdgesTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);

        // A ViewDragHelper can only manipulate one view at a time.
        if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgesTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
        } else if (mDragState == STATE_SETTLING) {
            // Catch a settling view if possible.
            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture == mCapturedView) {
                tryCaptureViewForDrag(toCapture, pointerId);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        // First to cross a touch slop over a draggable view wins. Also
        // report edge drags.
        final int pointerCount = MotionEventCompat.getPointerCount(ev);
        for (int i = 0; i < pointerCount && mInitialMotionX != null && mInitialMotionY != null; i++) {
            final int pointerId = MotionEventCompat.getPointerId(ev, i);
            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[pointerId];
            final float dy = y - mInitialMotionY[pointerId];

            reportNewEdgeDrags(dx, dy, pointerId);
            if (mDragState == STATE_DRAGGING) {
                // Callback might have started an edge drag
                break;
            }

            final View toCapture = findTopChildUnder((int) mInitialMotionX[pointerId],
                    (int) mInitialMotionY[pointerId]);
            if (toCapture != null && checkTouchSlop(toCapture, dx, dy)
                    && tryCaptureViewForDrag(toCapture, pointerId)) {
                break;
            }
        }
        saveLastMotion(ev);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }
    }

    return mDragState == STATE_DRAGGING;
}

---

From source file:android.improving.utils.views.swipeback.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's
 * onInterceptTouchEvent should cause the parent to intercept the touch
 * event stream.//from   ww  w  . ja v a 2 s  . c  om
 * 
 * @param ev
 *            MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from
 *         onInterceptTouchEvent
 */
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();
    }

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

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
            tryCaptureViewForDrag(toCapture, pointerId);
        }

        final int edgesTouched = mInitialEdgesTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);

        // A ViewDragHelper can only manipulate one view at a time.
        if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgesTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
        } else if (mDragState == STATE_SETTLING) {
            // Catch a settling view if possible.
            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture == mCapturedView) {
                tryCaptureViewForDrag(toCapture, pointerId);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        // First to cross a touch slop over a draggable view wins. Also
        // report edge drags.
        final int pointerCount = MotionEventCompat.getPointerCount(ev);
        for (int i = 0; i < pointerCount; i++) {
            final int pointerId = MotionEventCompat.getPointerId(ev, i);
            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[pointerId];
            final float dy = y - mInitialMotionY[pointerId];

            reportNewEdgeDrags(dx, dy, pointerId);
            if (mDragState == STATE_DRAGGING) {
                // Callback might have started an edge drag
                break;
            }

            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture != null && checkTouchSlop(toCapture, dx, dy)
                    && tryCaptureViewForDrag(toCapture, pointerId)) {
                break;
            }
        }
        saveLastMotion(ev);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }
    }

    return mDragState == STATE_DRAGGING;
}

---

From source file:ayushi.view.customview.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's onInterceptTouchEvent should
 * cause the parent to intercept the touch event stream.
 *
 * @param ev MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from onInterceptTouchEvent
 */// w  ww . j  a v  a2s . c om
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't get
        // the whole previous stream.
        cancel();
    }

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

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
            tryCaptureViewForDrag(toCapture, pointerId);
        }

        final int edgesTouched = mInitialEdgesTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);

        // A ViewDragHelper can only manipulate one view at a time.
        if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgesTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
        } else if (mDragState == STATE_SETTLING) {
            // Catch a settling view if possible.
            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture == mCapturedView) {
                tryCaptureViewForDrag(toCapture, pointerId);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        // First to cross a touch slop over a draggable view wins. Also report edge drags.
        final int pointerCount = MotionEventCompat.getPointerCount(ev);
        for (int i = 0; i < pointerCount && mInitialMotionX != null && mInitialMotionY != null; i++) {
            final int pointerId = MotionEventCompat.getPointerId(ev, i);
            if (pointerId >= mInitialMotionX.length || pointerId >= mInitialMotionY.length) {
                continue;
            }
            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[pointerId];
            final float dy = y - mInitialMotionY[pointerId];

            reportNewEdgeDrags(dx, dy, pointerId);
            if (mDragState == STATE_DRAGGING) {
                // Callback might have started an edge drag
                break;
            }

            final View toCapture = findTopChildUnder((int) mInitialMotionX[pointerId],
                    (int) mInitialMotionY[pointerId]);
            if (toCapture != null && checkTouchSlop(toCapture, dx, dy)
                    && tryCaptureViewForDrag(toCapture, pointerId)) {
                break;
            }
        }
        saveLastMotion(ev);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }
    }

    return mDragState == STATE_DRAGGING;
}

---

From source file:com.bigbug.android.pp.ui.widget.HorizontalListView.java

@Override
public boolean onTouchEvent(MotionEvent event) {
    // Detect when the user lifts their finger off the screen after a touch
    if (event.getAction() == MotionEvent.ACTION_UP) {
        stopNestedScroll();//  w ww  . j a va 2  s  . c  o  m

        // If not flinging then we are idle now. The user just finished a finger scroll.
        if (mFlingTracker == null || mFlingTracker.isFinished()) {
            setCurrentScrollState(OnScrollStateChangedListener.ScrollState.SCROLL_STATE_IDLE);
        }

        // Allow the user to interact with parent views
        requestParentListViewToNotInterceptTouchEvents(false);

        releaseEdgeGlow();
    } else if (event.getAction() == MotionEvent.ACTION_CANCEL) {
        unpressTouchedChild();
        releaseEdgeGlow();

        // Allow the user to interact with parent views
        requestParentListViewToNotInterceptTouchEvents(false);
    }

    return super.onTouchEvent(event);
}

---

From source file:com.android.slidingmenu.HorizontalListView.java

@Override
public boolean onTouchEvent(MotionEvent event) {
    // Detect when the user lifts their finger off the screen after a touch
    if (event.getAction() == MotionEvent.ACTION_UP) {
        // If not flinging then we are idle now. The user just finished a
        // finger scroll.
        if (mFlingTracker == null || mFlingTracker.isFinished()) {
            setCurrentScrollState(OnScrollStateChangedListener.ScrollState.SCROLL_STATE_IDLE);
        }// w  w  w  .j  a  va 2s  . co m

        // Allow the user to interact with parent views
        requestParentListViewToNotInterceptTouchEvents(false);

        releaseEdgeGlow();
    } else if (event.getAction() == MotionEvent.ACTION_CANCEL) {
        unpressTouchedChild();
        releaseEdgeGlow();

        // Allow the user to interact with parent views
        requestParentListViewToNotInterceptTouchEvents(false);
    }

    return super.onTouchEvent(event);
}

---

From source file:com.gizwits.smartlight.activity.MainListActivity.java

/**
 * Inits the events./*w ww .  jav  a 2  s .  co  m*/
 */
private void initEvents() {
    ivMenu.setOnClickListener(this);
    tvTitle.setOnClickListener(this);
    llFooter.setOnClickListener(this);
    tvEditSceneName.setOnClickListener(this);
    iftttButton.setOnClickListener(this);
    iftttButton.setClickable(false);
    // etGroup.setOnClickListener(this);
    //For lightness
    moveStep1 = (float) (((float) screenWidth / (float) 254) * 0.8);
    //For Hue
    moveStep2 = (float) (((float) screenWidth / (float) 65279) * 0.8);
    //For saturation
    moveStep3 = (float) (((float) screenWidth / (float) 254) * 0.8);

    lvDevice.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            if (!mAdapter.getItem(position).isOnline())
                return;

            if (mAdapter.getChoosedPos() == position) {
                mView.toggle();
                return;
            }

            mAdapter.setChoosedPos(position);
            mXpgWifiDevice = bindlist.get(position);
            loginDevice(mXpgWifiDevice);
        }
    });
    sbLightness.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                sbLightness.getParent().requestDisallowInterceptTouchEvent(true);
                break;
            case MotionEvent.ACTION_CANCEL:
                sbLightness.getParent().requestDisallowInterceptTouchEvent(false);
                break;
            }
            return false;
        }
    });
    sbLightness.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub
            mLightness = seekBar.getProgress();
            text_light.layout((int) (mLightness * moveStep1), 20, screenWidth, 80);
            text_light.setText(Integer.toString(mLightness));
            if (!selectGroup.equals("") && selectGroup != null) {
                mCenter.cLightnessGroup(selectGroup, seekBar.getProgress());

            } else {
                mCenter.cLightness(selectSubDevice, seekBar.getProgress());
            }
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub
        }

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
            // TODO Auto-generated method stub
        }
    });

    sbSaturation.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                sbSaturation.getParent().requestDisallowInterceptTouchEvent(true);
                break;
            case MotionEvent.ACTION_CANCEL:
                sbSaturation.getParent().requestDisallowInterceptTouchEvent(false);
                break;
            }
            return false;
        }
    });
    sbSaturation.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub
            mSaturation = seekBar.getProgress();
            text_saturation.layout((int) (mSaturation * moveStep3), 20, screenWidth, 80);
            text_saturation.setText(Integer.toString(mSaturation));

            if (!selectGroup.equals("") && selectGroup != null) {
                mCenter.cSaturationGroup(selectGroup, seekBar.getProgress());
            } else {
                mCenter.cSaturation(selectSubDevice, seekBar.getProgress());
            }
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub
        }

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
            // TODO Auto-generated method stub
        }
    });

    sbColor.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                sbColor.getParent().requestDisallowInterceptTouchEvent(true);
                break;
            case MotionEvent.ACTION_CANCEL:
                sbColor.getParent().requestDisallowInterceptTouchEvent(false);
                break;
            }
            return false;
        }
    });
    sbColor.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub
            mHue = seekBar.getProgress();
            text_hue.layout((int) (mHue * moveStep2), 20, screenWidth, 80);
            text_hue.setText(Integer.toString(mHue));
            if (!selectGroup.equals("") && selectGroup != null) {
                mCenter.cColorGroup(selectGroup, seekBar.getProgress());
            } else {
                mCenter.cColor(selectSubDevice, seekBar.getProgress());
            }
        }

        @Override
        public void onProgressChanged(SeekBar arg0, int progress, boolean fromUser) {
        }

        @Override
        public void onStartTrackingTouch(SeekBar bar) {

        }
    });
    alpha_bg.setOnClickListener(this);
    ivEdit.setOnClickListener(this);
    sclContent.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            // TODO Auto-generated method stub
            if (position == list.size() - 1) {
                Intent intent = new Intent(MainListActivity.this, EditGroupActivity.class);
                intent.putStringArrayListExtra("ledList", GroupDevice.getAllName(ledList));
                intent.putExtra("did", "" + centralControlDevice.getDid());
                startActivity(intent);
            }
        }
    });

    sclContent.setOnRefreshListener(new OnRefreshListener() {

        @Override
        public void onRefresh(RefreshableListView listView) {
            // TODO Auto-generated method stub
            Log.i(TAG, "slip down to refresh.........");
            mCenter.cGetGroups(setmanager.getUid(), setmanager.getToken(), Configs.PRODUCT_KEY_Sub);//?
            mCenter.cGetSubDevicesList(centralControlDevice);

            final Timer timer = new Timer();
            timer.schedule(new TimerTask() {

                @Override
                public void run() {
                    // TODO Auto-generated method stub
                    runOnUiThread(new Runnable() {
                        public void run() {
                            sclContent.completeRefreshing();
                        }
                    });
                    timer.cancel();
                }
            }, 2000);
        }
    });
    btnSwitch.setOnClickListener(this);
    addSceneButton.setOnClickListener(this);

    sceneListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> a, View v, int position, long id) {
            Object o = sceneListView.getItemAtPosition(position);
            scene obj_itemDetails = (scene) o;
            Log.i(TAG, "click now is " + obj_itemDetails.getName() + " " + obj_itemDetails.getValue());
        }
    });
}

---

From source file:com.cylee.dragcontentviewpager.ViewDragHelper.java

/**
 * Check if this event as provided to the parent view's onInterceptTouchEvent should
 * cause the parent to intercept the touch event stream.
 *
 * @param ev MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from onInterceptTouchEvent
 *//* w  w  w  .ja  va 2 s  . c o  m*/
public boolean shouldInterceptTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);
    final int actionIndex = MotionEventCompat.getActionIndex(ev);

    if (action == MotionEvent.ACTION_DOWN) {
        // Reset things for a new event stream, just in case we didn't getInstance
        // the whole previous stream.
        cancel();
    }

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

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        final int pointerId = MotionEventCompat.getPointerId(ev, 0);
        saveInitialMotion(x, y, pointerId);

        final View toCapture = findTopChildUnder((int) x, (int) y);

        // Catch a settling view if possible.
        if (toCapture == mCapturedView && mDragState == STATE_SETTLING) {
            tryCaptureViewForDrag(toCapture, pointerId);
        }

        final int edgesTouched = mInitialEdgesTouched[pointerId];
        if ((edgesTouched & mTrackingEdges) != 0) {
            mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
        }
        break;
    }

    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        final float x = MotionEventCompat.getX(ev, actionIndex);
        final float y = MotionEventCompat.getY(ev, actionIndex);

        saveInitialMotion(x, y, pointerId);

        // A ViewDragHelper can only manipulate one view at a time.
        if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgesTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
        } else if (mDragState == STATE_SETTLING) {
            // Catch a settling view if possible.
            final View toCapture = findTopChildUnder((int) x, (int) y);
            if (toCapture == mCapturedView) {
                tryCaptureViewForDrag(toCapture, pointerId);
            }
        }
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        // First to cross a touch slop over a draggable view wins. Also report edge drags.
        final int pointerCount = MotionEventCompat.getPointerCount(ev);
        for (int i = 0; i < pointerCount; i++) {
            final int pointerId = MotionEventCompat.getPointerId(ev, i);
            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[pointerId];
            final float dy = y - mInitialMotionY[pointerId];

            final View toCapture = findTopChildUnder((int) x, (int) y);
            final boolean pastSlop = toCapture != null && checkTouchSlop(toCapture, dx, dy);
            if (pastSlop) {
                // check the callback's
                // getView[Horizontal|Vertical]DragRange methods to know
                // if you can move at all along an axis, then see if it
                // would clamp to the same value. If you can't move at
                // all in every dimension with a nonzero range, bail.
                final int oldLeft = toCapture.getLeft();
                final int targetLeft = oldLeft + (int) dx;
                final int newLeft = mCallback.clampViewPositionHorizontal(toCapture, targetLeft, (int) dx);
                final int oldTop = toCapture.getTop();
                final int targetTop = oldTop + (int) dy;
                final int newTop = mCallback.clampViewPositionVertical(toCapture, targetTop, (int) dy);
                final int horizontalDragRange = mCallback.getViewHorizontalDragRange(toCapture);
                final int verticalDragRange = mCallback.getViewVerticalDragRange(toCapture);
                if ((horizontalDragRange == 0 || horizontalDragRange > 0 && newLeft == oldLeft)
                        && (verticalDragRange == 0 || verticalDragRange > 0 && newTop == oldTop)) {
                    break;
                }
            }
            reportNewEdgeDrags(dx, dy, pointerId);
            if (mDragState == STATE_DRAGGING) {
                // Callback might have started an edge drag
                break;
            }

            if (pastSlop && !canScroll(toCapture, true, (int) dx, (int) dy, (int) x, (int) y)
                    && tryCaptureViewForDrag(toCapture, pointerId)) {
                break;
            }
        }
        saveLastMotion(ev);
        break;
    }

    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        cancel();
        break;
    }
    }

    return mDragState == STATE_DRAGGING;
}

---

From source file:android.support.v7.widget.RecyclerView.java

private boolean dispatchOnItemTouchIntercept(MotionEvent e) {
    final int action = e.getAction();
    if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_DOWN) {
        mActiveOnItemTouchListener = null;
    }//from w  w w. j a va2s  .com

    final int listenerCount = mOnItemTouchListeners.size();
    for (int i = 0; i < listenerCount; i++) {
        final OnItemTouchListener listener = mOnItemTouchListeners.get(i);
        if (listener.onInterceptTouchEvent(this, e) && action != MotionEvent.ACTION_CANCEL) {
            mActiveOnItemTouchListener = listener;
            return true;
        }
    }
    return false;
}

---

From source file:ca.co.rufus.androidboilerplate.ui.DebugDrawerLayout.java

@Override
public boolean onTouchEvent(MotionEvent ev) {
    mLeftDragger.processTouchEvent(ev);//from   ww  w .  j av a2  s.  c om
    mRightDragger.processTouchEvent(ev);

    final int action = ev.getAction();
    boolean wantTouchEvents = true;

    switch (action & MotionEventCompat.ACTION_MASK) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        mInitialMotionX = x;
        mInitialMotionY = y;
        mDisallowInterceptRequested = false;
        mChildrenCanceledTouch = false;
        break;
    }

    case MotionEvent.ACTION_UP: {
        final float x = ev.getX();
        final float y = ev.getY();
        boolean peekingOnly = true;
        final View touchedView = mLeftDragger.findTopChildUnder((int) x, (int) y);
        if (touchedView != null && isContentView(touchedView)) {
            final float dx = x - mInitialMotionX;
            final float dy = y - mInitialMotionY;
            final int slop = mLeftDragger.getTouchSlop();
            if (dx * dx + dy * dy < slop * slop) {
                // Taps close a dimmed open drawer but only if it isn't locked open.
                final View openDrawer = findOpenDrawer();
                if (openDrawer != null) {
                    peekingOnly = getDrawerLockMode(openDrawer) == LOCK_MODE_LOCKED_OPEN;
                }
            }
        }
        closeDrawers(peekingOnly);
        mDisallowInterceptRequested = false;
        break;
    }

    case MotionEvent.ACTION_CANCEL: {
        closeDrawers(true);
        mDisallowInterceptRequested = false;
        mChildrenCanceledTouch = false;
        break;
    }
    }

    return wantTouchEvents;
}

---

From source file:com.aidy.bottomdrawerlayout.AllDrawerLayout.java

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    Log.i(TAG, "onInterceptTouchEvent()");
    final int action = MotionEventCompat.getActionMasked(ev);

    // "|" used deliberately here; both methods should be invoked.
    final boolean interceptForDrag = mLeftDragger.shouldInterceptTouchEvent(ev)
            | mRightDragger.shouldInterceptTouchEvent(ev) | mTopDragger.shouldInterceptTouchEvent(ev)
            | mBottomDragger.shouldInterceptTouchEvent(ev);
    boolean interceptForTap = false;
    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        Log.i(TAG, "onInterceptTouchEvent() -- ACTION_DOWN");
        final float x = ev.getX();
        final float y = ev.getY();
        mInitialMotionX = x;/* w w  w . j a v  a  2  s  .c  o m*/
        mInitialMotionY = y;
        if (mScrimOpacity > 0 && isContentView(mLeftDragger.findTopChildUnder((int) x, (int) y))) {
            interceptForTap = true;
        }
        mDisallowInterceptRequested = false;
        mChildrenCanceledTouch = false;
        break;
    }

    case MotionEvent.ACTION_MOVE: {
        Log.i(TAG, "onInterceptTouchEvent() -- ACTION_MOVE");
        // If we cross the touch slop, don't perform the delayed peek for an
        // edge touch.
        if (mLeftDragger.checkTouchSlop(ViewDragHelper.DIRECTION_ALL)) {
            Log.i(TAG, "onInterceptTouchEvent() -- ACTION_MOVE -- 2");
            mLeftCallback.removeCallbacks();
            mRightCallback.removeCallbacks();
            mTopCallback.removeCallbacks();
            mBottomCallback.removeCallbacks();
        }
        break;
    }

    case MotionEvent.ACTION_CANCEL:
    case MotionEvent.ACTION_UP: {
        Log.i(TAG, "onInterceptTouchEvent() -- ACTION_CANCEL | ACTION_UP");
        closeDrawers(true);
        mDisallowInterceptRequested = false;
        mChildrenCanceledTouch = false;
    }
    }

    boolean result = interceptForDrag || interceptForTap || hasPeekingDrawer() || mChildrenCanceledTouch;
    Log.i(TAG, "onInterceptTouchEvent() -- result = " + result);
    return result;
}

---

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