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

Introduction

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

Prototype

public static int getActionMasked(MotionEvent event) 

Source Link

Document

Call MotionEvent#getAction , returning only the #ACTION_MASK portion.

Usage

From source file:com.hengye.swiperefresh.SwipeRefreshLayout.java

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

    if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
        mReturningToStart = false;//from  w w  w . j  a v  a2  s  . co m
    }

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

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

    case MotionEvent.ACTION_MOVE: {
        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 overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
        if (mIsBeingDragged) {
            if (overscrollTop > 0) {
                moveSpinner(overscrollTop);
            } else {
                return false;
            }
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        pointerIndex = MotionEventCompat.getActionIndex(ev);
        if (pointerIndex < 0) {
            Log.e(LOG_TAG, "Got ACTION_POINTER_DOWN event but have an invalid action index.");
            return false;
        }
        mActivePointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
        break;
    }

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

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

        final float y = MotionEventCompat.getY(ev, pointerIndex);
        final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
        mIsBeingDragged = false;
        finishSpinner(overscrollTop);
        mActivePointerId = INVALID_POINTER;
        return false;
    }
    case MotionEvent.ACTION_CANCEL:
        return false;
    }

    return true;
}

---

From source file:com.dk.view.FolderDrawerLayout.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;//w w  w .  j  a  v  a2s.  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: {
        // 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:com.hippo.refreshlayout.RefreshLayout.java

private boolean headerInterceptTouchEvent(MotionEvent ev) {
    int pointerIndex;
    final int action = MotionEventCompat.getActionMasked(ev);
    switch (action) {
    case MotionEvent.ACTION_DOWN:
        setHeaderTargetOffsetTopAndBottom(mHeaderOriginalOffsetTop - mCircleView.getTop(), true);
        mActivePointerId = ev.getPointerId(0);
        mIsHeaderBeingDragged = false;/*from w w w  .j  av a2s  .co m*/

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

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

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

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

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

    return mIsHeaderBeingDragged;
}

---

From source file:com.example.verticaldrawerlayout.VerticalDrawerLayout.java

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

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

    boolean interceptForTap = false;

    switch (action) {
    case MotionEvent.ACTION_DOWN: {
        final float x = ev.getX();
        final float y = ev.getY();
        mInitialMotionX = x;/*from ww  w .  ja  va  2s. c o  m*/
        mInitialMotionY = y;
        if (mScrimOpacity > 0 && isContentView(mTopDragger.findTopChildUnder((int) x, (int) y))) {
            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 (mTopDragger.checkTouchSlop(ViewDragHelper.DIRECTION_ALL)) {
            mTopCallback.removeCallbacks();
            mBottomCallback.removeCallbacks();
        }
        break;
    }

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

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

---

From source file:com.juyujuyu.SwipeLoadLayout.java

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

    if (mReturningToStart && action == MotionEvent.ACTION_DOWN) {
        mReturningToStart = false;/*from  w  ww. java  2 s . c o m*/
    }

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

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

    case MotionEvent.ACTION_MOVE: {
        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 overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
        if (mIsBeingDragged) {
            //                    if (overscrollTop > 0) {
            //                        moveSpinner(overscrollTop);
            //                    } else {
            //                        return false;
            //                    }
            moveSpinner(overscrollTop);
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        pointerIndex = MotionEventCompat.getActionIndex(ev);
        if (pointerIndex < 0) {
            Log.e(LOG_TAG, "Got ACTION_POINTER_DOWN event but have an invalid action index.");
            return false;
        }
        mActivePointerId = MotionEventCompat.getPointerId(ev, pointerIndex);
        break;
    }

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

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

        final float y = MotionEventCompat.getY(ev, pointerIndex);
        final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
        mIsBeingDragged = false;
        finishSpinner(overscrollTop);
        mActivePointerId = INVALID_POINTER;
        return false;
    }
    case MotionEvent.ACTION_CANCEL:
        return false;
    }

    return true;
}

---

From source file:com.albedinsky.android.support.ui.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.
 *
 * @param ev MotionEvent provided to onInterceptTouchEvent
 * @return true if the parent view should return true from onInterceptTouchEvent
 *///  w ww.  j  a v  a2 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 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:com.architjn.acjmusicplayer.ui.widget.slidinguppanel.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 .ja va  2s .  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);
            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.p2p.ui.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
 *///from   w  w  w.j  av  a 2s  . co  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 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_normal 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:com.klinker.android.launcher.addons.view.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 .java  2s  . 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 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: {
        if (mInitialMotionX == null || mInitialMotionY == null) {
            return false;
        }
        // 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 float slope = Math.abs(dy / dx);

            if (slope >= 1) {
                break;
            }

            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:com.cyan.widget.refreshlayout.RefreshLayout.java

private boolean headerTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);

    switch (action) {
    case MotionEvent.ACTION_DOWN:
        mActivePointerId = MotionEventCompat.getPointerId(ev, 0);
        mIsHeaderBeingDragged = false;//w w  w . ja v a  2 s.  c o m
        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;
        }

        float y;
        try {
            y = MotionEventCompat.getY(ev, pointerIndex);
        } catch (IllegalArgumentException e) {
            y = mInitialMotionY;
        }
        final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
        if (mIsHeaderBeingDragged) {
            mProgress.showArrow(true);
            float originalDragPercent = overscrollTop / mHeaderTotalDragDistance;
            if (originalDragPercent < 0) {
                return false;
            }
            float dragPercent = Math.min(1f, Math.abs(originalDragPercent));
            float adjustedPercent = (float) Math.max(dragPercent - .4, 0) * 5 / 3;
            float extraOS = Math.abs(overscrollTop) - mHeaderTotalDragDistance;
            float slingshotDist = mHeaderUsingCustomStart ? mSpinnerFinalOffset - mHeaderOriginalOffsetTop
                    : mSpinnerFinalOffset;
            float tensionSlingshotPercent = Math.max(0, Math.min(extraOS, slingshotDist * 2) / slingshotDist);
            float tensionPercent = (float) ((tensionSlingshotPercent / 4)
                    - Math.pow((tensionSlingshotPercent / 4), 2)) * 2f;
            float extraMove = (slingshotDist) * tensionPercent * 2;

            int targetY = mHeaderOriginalOffsetTop + (int) ((slingshotDist * dragPercent) + extraMove);
            // where 1.0f is a full circle
            if (mCircleView.getVisibility() != View.VISIBLE) {
                mCircleView.setVisibility(View.VISIBLE);
            }
            if (!mHeaderScale) {
                ViewCompat.setScaleX(mCircleView, 1f);
                ViewCompat.setScaleY(mCircleView, 1f);
            }
            if (overscrollTop < mHeaderTotalDragDistance) {
                if (mHeaderScale) {
                    setAnimationProgress(overscrollTop / mHeaderTotalDragDistance);
                }
                if (mProgress.getAlpha() > STARTING_PROGRESS_ALPHA
                        && !isAnimationRunning(mHeaderAlphaStartAnimation)) {
                    // Animate the alpha
                    startHeaderProgressAlphaStartAnimation();
                }
                float strokeStart = adjustedPercent * .8f;
                mProgress.setStartEndTrim(0f, Math.min(MAX_PROGRESS_ANGLE, strokeStart));
                mProgress.setArrowScale(Math.min(1f, adjustedPercent));
            } else {
                if (mProgress.getAlpha() < MAX_ALPHA && !isAnimationRunning(mHeaderAlphaMaxAnimation)) {
                    // Animate the alpha
                    startHeaderProgressAlphaMaxAnimation();
                }
            }
            float rotation = (-0.25f + .4f * adjustedPercent + tensionPercent * 2) * .5f;
            mProgress.setProgressRotation(rotation);
            setHeaderTargetOffsetTopAndBottom(targetY - mHeaderCurrentTargetOffsetTop,
                    true /* requires update */);
        }
        break;
    }
    case MotionEventCompat.ACTION_POINTER_DOWN: {
        final int index = MotionEventCompat.getActionIndex(ev);
        mActivePointerId = MotionEventCompat.getPointerId(ev, index);
        break;
    }

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

    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL: {
        if (mActivePointerId == INVALID_POINTER) {
            if (action == MotionEvent.ACTION_UP) {
                Log.e(LOG_TAG, "Got ACTION_UP event but don't have an active pointer id.");
            }
            return false;
        }
        final int pointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId);
        final float y = MotionEventCompat.getY(ev, pointerIndex);
        final float overscrollTop = (y - mInitialMotionY) * DRAG_RATE;
        mIsHeaderBeingDragged = false;
        if (overscrollTop > mHeaderTotalDragDistance) {
            setHeaderRefreshing(true, true /* notify */);
        } else {
            // cancel refresh
            mHeaderRefreshing = false;
            mProgress.setStartEndTrim(0f, 0f);
            AnimationListener listener = null;
            if (!mHeaderScale) {
                listener = new AnimationListener() {

                    @Override
                    public void onAnimationStart(Animation animation) {
                    }

                    @Override
                    public void onAnimationEnd(Animation animation) {
                        if (!mHeaderScale) {
                            startScaleDownAnimation(null);
                        }
                    }

                    @Override
                    public void onAnimationRepeat(Animation animation) {
                    }

                };
            }
            animateHeaderOffsetToStartPosition(mHeaderCurrentTargetOffsetTop, listener);
            mProgress.showArrow(false);
        }
        mActivePointerId = INVALID_POINTER;
        return false;
    }
    }

    return mIsHeaderBeingDragged;
}

---

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