Example usage for android.view MotionEvent ACTION_UP

Introduction

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

Prototype

int ACTION_UP

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

Click Source Link

Document

Constant for #getActionMasked : A pressed gesture has finished, the motion contains the final release location as well as any intermediate points since the last down or move event.

Usage

From source file:com.android.kit.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   www  . ja  v  a 2  s.  c  o 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.
        tryCaptureViewForDrag(toCapture, pointerId);

        final int edgesTouched = mInitialEdgeTouched[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);
        break;
    }
    case MotionEvent.ACTION_MOVE: {
        if (mDragState == STATE_JUDGING) {

            final int i = MotionEventCompat.findPointerIndex(ev, mActivePointerId);

            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[mActivePointerId];
            final float dy = y - mInitialMotionY[mActivePointerId];

            reportNewEdgeDrags(dx, dy, mActivePointerId);

            final View toCapture = findTopChildUnder((int) x, (int) y);
            int slop = checkTouchSlop(toCapture, dx, dy);

            if (slop == -1)
                cancel();
            else if (slop > 0 && tryCaptureViewForDrag(toCapture, mActivePointerId)) {
                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.if3games.chessonline.DroidFish.java

private final void initUI() {
    leftHanded = leftHandedView();//from   ww  w.ja v  a  2  s  . c  o  m
    if (!isSinglePlayer) {
        setContentView(leftHanded ? R.layout.main_left_handed_gms : R.layout.main_gms);
        for (int id : CLICKABLES) {
            findViewById(id).setOnClickListener(this);
        }
    } else {
        setContentView(leftHanded ? R.layout.main_left_handed : R.layout.main);
    }
    Util.overrideFonts(findViewById(android.R.id.content));

    // title lines need to be regenerated every time due to layout changes (rotations)
    secondTitleLine = findViewById(R.id.second_title_line);
    whiteTitleText = (TextView) findViewById(R.id.white_clock);
    whiteTitleText.setSelected(true);
    blackTitleText = (TextView) findViewById(R.id.black_clock);
    blackTitleText.setSelected(true);
    engineTitleText = (TextView) findViewById(R.id.title_text);
    whiteFigText = (TextView) findViewById(R.id.white_pieces);
    whiteFigText.setTypeface(figNotation);
    whiteFigText.setSelected(true);
    whiteFigText.setTextColor(whiteTitleText.getTextColors());
    blackFigText = (TextView) findViewById(R.id.black_pieces);
    blackFigText.setTypeface(figNotation);
    blackFigText.setSelected(true);
    blackFigText.setTextColor(blackTitleText.getTextColors());
    summaryTitleText = (TextView) findViewById(R.id.title_text_summary);

    player1TitleText = (TextView) findViewById(R.id.player1);
    player2TitleText = (TextView) findViewById(R.id.player2);

    status = (TextView) findViewById(R.id.status);
    moveListScroll = (ScrollView) findViewById(R.id.scrollView);
    moveList = (TextView) findViewById(R.id.moveList);
    defaultMoveListTypeFace = moveList.getTypeface();
    thinking = (TextView) findViewById(R.id.thinking);
    defaultThinkingListTypeFace = thinking.getTypeface();
    status.setFocusable(false);
    moveListScroll.setFocusable(false);
    moveList.setFocusable(false);
    moveList.setMovementMethod(LinkMovementMethod.getInstance());
    thinking.setFocusable(false);

    cb = (ChessBoardPlay) findViewById(R.id.chessboard);
    cb.setFocusable(true);
    cb.requestFocus();
    cb.setClickable(true);
    cb.setPgnOptions(pgnOptions);

    final GestureDetector gd = new GestureDetector(new GestureDetector.SimpleOnGestureListener() {
        private float scrollX = 0;
        private float scrollY = 0;

        @Override
        public boolean onDown(MotionEvent e) {
            if (!boardGestures) {
                handleClick(e);
                return true;
            }
            scrollX = 0;
            scrollY = 0;
            return false;
        }

        @Override
        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            if (!boardGestures)
                return false;
            cb.cancelLongPress();
            if (invertScrollDirection) {
                distanceX = -distanceX;
                distanceY = -distanceY;
            }
            if ((scrollSensitivity > 0) && (cb.sqSize > 0)) {
                scrollX += distanceX;
                scrollY += distanceY;
                float scrollUnit = cb.sqSize * scrollSensitivity;
                if (Math.abs(scrollX) >= Math.abs(scrollY)) {
                    // Undo/redo
                    int nRedo = 0, nUndo = 0;
                    while (scrollX > scrollUnit) {
                        nRedo++;
                        scrollX -= scrollUnit;
                    }
                    while (scrollX < -scrollUnit) {
                        nUndo++;
                        scrollX += scrollUnit;
                    }
                    if (nUndo + nRedo > 0)
                        scrollY = 0;
                    if (nRedo + nUndo > 1) {
                        boolean analysis = gameMode.analysisMode();
                        boolean human = gameMode.playerWhite() || gameMode.playerBlack();
                        if (analysis || !human)
                            ctrl.setGameMode(new GameMode(GameMode.TWO_PLAYERS));
                    }
                    for (int i = 0; i < nRedo; i++)
                        ctrl.redoMove();
                    for (int i = 0; i < nUndo; i++)
                        ctrl.undoMove();
                    ctrl.setGameMode(gameMode);
                } else {
                    // Next/previous variation
                    int varDelta = 0;
                    while (scrollY > scrollUnit) {
                        varDelta++;
                        scrollY -= scrollUnit;
                    }
                    while (scrollY < -scrollUnit) {
                        varDelta--;
                        scrollY += scrollUnit;
                    }
                    if (varDelta != 0)
                        scrollX = 0;
                    ctrl.changeVariation(varDelta);
                }
            }
            return true;
        }

        @Override
        public boolean onSingleTapUp(MotionEvent e) {
            if (!boardGestures)
                return false;
            cb.cancelLongPress();
            handleClick(e);
            return true;
        }

        @Override
        public boolean onDoubleTapEvent(MotionEvent e) {
            if (!boardGestures)
                return false;
            if (e.getAction() == MotionEvent.ACTION_UP)
                handleClick(e);
            return true;
        }

        private final void handleClick(MotionEvent e) {
            if (ctrl.humansTurn() && myTurn) {
                int sq = cb.eventToSquare(e);
                Move m = cb.mousePressed(sq);
                if (m != null) {
                    ctrl.makeHumanMove(m);
                    if (!isSinglePlayer) {
                        if (!invalidMove)
                            broadcastMove(m.to, m.from);
                        else
                            invalidMove = false;
                    }
                }
                setEgtbHints(cb.getSelectedSquare());
            }
        }

        @Override
        public void onLongPress(MotionEvent e) {
            if (!boardGestures)
                return;
            ((Vibrator) getSystemService(Context.VIBRATOR_SERVICE)).vibrate(20);
            removeDialog(BOARD_MENU_DIALOG);
            showDialog(BOARD_MENU_DIALOG);
        }
    });
    cb.setOnTouchListener(new OnTouchListener() {
        public boolean onTouch(View v, MotionEvent event) {
            return gd.onTouchEvent(event);
        }
    });
    cb.setOnTrackballListener(new ChessBoard.OnTrackballListener() {
        public void onTrackballEvent(MotionEvent event) {
            if (ctrl.humansTurn()) {
                Move m = cb.handleTrackballEvent(event);
                if (m != null)
                    ctrl.makeHumanMove(m);
                setEgtbHints(cb.getSelectedSquare());
            }
        }
    });

    moveList.setOnLongClickListener(new OnLongClickListener() {
        public boolean onLongClick(View v) {
            removeDialog(MOVELIST_MENU_DIALOG);
            showDialog(MOVELIST_MENU_DIALOG);
            return true;
        }
    });
    thinking.setOnLongClickListener(new OnLongClickListener() {
        public boolean onLongClick(View v) {
            if (mShowThinking || gameMode.analysisMode()) {
                if (!pvMoves.isEmpty()) {
                    removeDialog(THINKING_MENU_DIALOG);
                    showDialog(THINKING_MENU_DIALOG);
                }
            }
            return true;
        }
    });

    custom1Button = (ImageButton) findViewById(R.id.custom1Button);
    custom1ButtonActions.setImageButton(custom1Button, this);
    custom2Button = (ImageButton) findViewById(R.id.custom2Button);
    custom2ButtonActions.setImageButton(custom2Button, this);
    custom3Button = (ImageButton) findViewById(R.id.custom3Button);
    custom3ButtonActions.setImageButton(custom3Button, this);

    modeButton = (ImageButton) findViewById(R.id.modeButton);
    modeButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            if (isSinglePlayer)
                showDialog(GAME_MODE_DIALOG);
            else
                showDialog(GAME_GMS_MODE_DIALOG);
        }
    });
    undoButton = (ImageButton) findViewById(R.id.undoButton);
    redoButton = (ImageButton) findViewById(R.id.redoButton);

    if (isSinglePlayer) {
        undoButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                ctrl.undoMove();
            }
        });
        undoButton.setOnLongClickListener(new OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                removeDialog(GO_BACK_MENU_DIALOG);
                showDialog(GO_BACK_MENU_DIALOG);
                return true;
            }
        });

        redoButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                ctrl.redoMove();
            }
        });
        redoButton.setOnLongClickListener(new OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                removeDialog(GO_FORWARD_MENU_DIALOG);
                showDialog(GO_FORWARD_MENU_DIALOG);
                return true;
            }
        });
    } else {
        undoButton.setVisibility(View.GONE);
        redoButton.setVisibility(View.GONE);
    }
}

---

From source file:androidVNC.VncCanvasActivity.java

boolean touchPan(MotionEvent event) {
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
        panTouchX = event.getX();//ww  w  . ja va  2s.  c om
        panTouchY = event.getY();
        break;
    case MotionEvent.ACTION_MOVE:
        pan(event);
        panTouchX = event.getX();
        panTouchY = event.getY();
        break;
    case MotionEvent.ACTION_UP:
        pan(event);
        break;
    }
    return true;
}

---

From source file:com.appsummary.luoxf.mylibrary.swipbackhelper.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 w  ww.j av a 2  s.com
 *
 * @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();
    }

    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.
        tryCaptureViewForDrag(toCapture, pointerId);

        if (mDragState == STATE_SETTLING) {
            setDragState(STATE_DRAGGING);
        } else if (mDragState == STATE_IDLE) {
            final int edgesTouched = mInitialEdgeTouched[pointerId];
            if ((edgesTouched & mTrackingEdges) != 0) {
                mCallback.onEdgeTouched(edgesTouched & mTrackingEdges, pointerId);
            }
            setDragState(STATE_JUDGING);
        }
        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);
        break;
    }
    case MotionEvent.ACTION_MOVE: {
        if (mDragState == STATE_JUDGING) {
            if (mVelocityTracker == null) {
                mVelocityTracker = VelocityTracker.obtain();
            }
            if (mDragState == STATE_DRAGGING)
                mVelocityTracker.addMovement(ev);
            final int i = MotionEventCompat.findPointerIndex(ev, mActivePointerId);

            final float x = MotionEventCompat.getX(ev, i);
            final float y = MotionEventCompat.getY(ev, i);
            final float dx = x - mInitialMotionX[mActivePointerId];
            final float dy = y - mInitialMotionY[mActivePointerId];

            reportNewEdgeDrags(dx, dy, mActivePointerId);

            final View toCapture = findTopChildUnder((int) x, (int) y);
            int slop = checkTouchSlop(toCapture, dx, dy);

            if (slop == -1)
                cancel();
            else if (slop > 0 && tryCaptureViewForDrag(toCapture, mActivePointerId)) {
                break;
            }
            saveLastMotion(ev);
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_UP: {
        final int pointerId = MotionEventCompat.getPointerId(ev, actionIndex);
        clearMotionHistory(pointerId);
        break;
    }

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

    case MotionEvent.ACTION_CANCEL: {
        dispatchViewReleased(0, 0);
        cancel();
        break;
    }

    }
    return mDragState == STATE_DRAGGING;
}

---

From source file:aksha.upcomingdemo.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);
        }//from  ww  w .j  av  a2  s  . c  o  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.android.systemui.statusbar.phone.NotificationPanelView.java

private void onQsTouch(MotionEvent event) {
    int pointerIndex = event.findPointerIndex(mTrackingPointer);
    if (pointerIndex < 0) {
        pointerIndex = 0;/*from   www  .  j  a va 2 s .  c om*/
        mTrackingPointer = event.getPointerId(pointerIndex);
    }
    final float y = event.getY(pointerIndex);
    final float x = event.getX(pointerIndex);
    final float h = y - mInitialTouchY;
    logf("onQsTouch() touch event = " + event.getActionMasked());
    switch (event.getActionMasked()) {
    case MotionEvent.ACTION_DOWN:
        logf("onQsTouch() touch event = MotionEvent.ACTION_DOWN ");
        mQsTracking = true;
        mInitialTouchY = y;
        mInitialTouchX = x;
        onQsExpansionStarted();
        mInitialHeightOnTouch = mQsExpansionHeight;
        initVelocityTracker();
        trackMovement(event);
        break;

    case MotionEvent.ACTION_POINTER_UP:
        logf("onQsTouch() touch event = MotionEvent.ACTION_POINTER_UP ");
        final int upPointer = event.getPointerId(event.getActionIndex());
        if (mTrackingPointer == upPointer) {
            // gesture is ongoing, find a new pointer to track
            final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1;
            final float newY = event.getY(newIndex);
            final float newX = event.getX(newIndex);
            mTrackingPointer = event.getPointerId(newIndex);
            mInitialHeightOnTouch = mQsExpansionHeight;
            mInitialTouchY = newY;
            mInitialTouchX = newX;
        }
        break;

    case MotionEvent.ACTION_MOVE:
        logf("onQsTouch() touch event = MotionEvent.ACTION_MOVE ");
        setQsExpansion(h + mInitialHeightOnTouch);
        if (h >= getFalsingThreshold()) {
            mQsTouchAboveFalsingThreshold = true;
        }
        trackMovement(event);
        break;

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL:
        logf("onQsTouch() touch event = MotionEvent.ACTION_UP/ACTION_CANCEL");
        mQsTracking = false;
        mTrackingPointer = -1;
        trackMovement(event);
        float fraction = getQsExpansionFraction();
        if ((fraction != 0f || y >= mInitialTouchY) && (fraction != 1f || y <= mInitialTouchY)) {
            flingQsWithCurrentVelocity(y, event.getActionMasked() == MotionEvent.ACTION_CANCEL);
        } else {
            logQsSwipeDown(y);
            mScrollYOverride = -1;
        }
        if (mVelocityTracker != null) {
            mVelocityTracker.recycle();
            mVelocityTracker = null;
        }
        break;
    }
}

---

From source file:co.codecrunch.musicplayerlite.slidinguppanelhelper.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 ww.  jav a  2  s .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);
            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:android.wuliqing.com.lendphonesystemapp.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 w  w w .  ja  v a2 s.  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 = mInitialEdgeTouched[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 = mInitialEdgeTouched[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:ca.co.rufus.androidboilerplate.ui.DebugDrawerLayout.java

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

    // "|" used deliberately here; both methods should be invoked.
    final boolean interceptForDrag = mLeftDragger.shouldInterceptTouchEvent(ev)
            | mRightDragger.shouldInterceptTouchEvent(ev);

    boolean interceptForTap = false;

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        mInitialMotionX = x;/*from w  ww. ja  v  a 2 s  .  c  o  m*/
        mInitialMotionY = y;
        if (mScrimOpacity > 0) {
            final View child = mLeftDragger.findTopChildUnder((int) x, (int) y);
            if (child != null && isContentView(child)) {
                interceptForTap = true;
            }
        }
        mDisallowInterceptRequested = false;
        mChildrenCanceledTouch = false;
        break;
    }

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

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

    return interceptForDrag || interceptForTap || hasPeekingDrawer() || mChildrenCanceledTouch;
}

---

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  ww.  j  av  a2 s .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;
}

---

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