List of usage examples for android.support.v4.view MotionEventCompat getActionIndex
public static int getActionIndex(MotionEvent event)
From source file:com.marshalchen.common.uimodule.superlistview.SwipeDismissListViewTouchListener.java
@Override public boolean onTouch(View view, MotionEvent motionEvent) { if (mViewWidth < 2) { mViewWidth = mListView.getWidth(); }/*ww w . j a v a 2 s.c o m*/ switch (MotionEventCompat.getActionMasked(motionEvent)) { case MotionEvent.ACTION_DOWN: { if (mPaused) { return false; } // TODO: ensure this is a finger, and set a flag // Find the child view that was touched (perform a hit test) Rect rect = new Rect(); int childCount = mListView.getChildCount(); int[] listViewCoords = new int[2]; mListView.getLocationOnScreen(listViewCoords); int x = (int) motionEvent.getRawX() - listViewCoords[0]; int y = (int) motionEvent.getRawY() - listViewCoords[1]; View child; for (int i = 0; i < childCount; i++) { child = mListView.getChildAt(i); child.getHitRect(rect); if (rect.contains(x, y)) { mDownView = child; mDownViewProxy = AnimatorProxy.wrap(child); break; } } if (mDownView != null) { mDownX = motionEvent.getRawX(); mDownY = motionEvent.getRawY(); mDownPosition = mListView.getPositionForView(mDownView); if (mCallbacks.canDismiss(mDownPosition)) { mVelocityTracker = VelocityTracker.obtain(); mVelocityTracker.addMovement(motionEvent); } else { mDownView = null; mDownViewProxy = null; } } return false; } case MotionEvent.ACTION_CANCEL: { if (mVelocityTracker == null) { break; } if (mDownView != null && mSwiping) { // cancel animate(mDownView).translationX(0).alpha(1).setDuration(mAnimationTime).setListener(null); } mVelocityTracker.recycle(); mVelocityTracker = null; mDownX = 0; mDownY = 0; mDownView = null; mDownViewProxy = null; mDownPosition = ListView.INVALID_POSITION; mSwiping = false; break; } case MotionEvent.ACTION_UP: { if (mVelocityTracker == null) { break; } float deltaX = motionEvent.getRawX() - mDownX; mVelocityTracker.addMovement(motionEvent); mVelocityTracker.computeCurrentVelocity(1000); float velocityX = mVelocityTracker.getXVelocity(); float absVelocityX = Math.abs(velocityX); float absVelocityY = Math.abs(mVelocityTracker.getYVelocity()); boolean dismiss = false; boolean dismissRight = false; if (Math.abs(deltaX) > mViewWidth / 2 && mSwiping) { dismiss = true; dismissRight = deltaX > 0; } else if (mMinFlingVelocity <= absVelocityX && absVelocityX <= mMaxFlingVelocity && absVelocityY < absVelocityX && mSwiping) { // dismiss only if flinging in the same direction as dragging dismiss = (velocityX < 0) == (deltaX < 0); dismissRight = mVelocityTracker.getXVelocity() > 0; } if (dismiss && mDownPosition != ListView.INVALID_POSITION) { // dismiss final View downView = mDownView; // mDownView gets null'd before animation ends final int downPosition = mDownPosition; ++mDismissAnimationRefCount; animate(mDownView).translationX(dismissRight ? mViewWidth : -mViewWidth).alpha(0) .setDuration(mAnimationTime).setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { performDismiss(downView, downPosition); } }); } else { animate(mDownView).translationX(0).alpha(1).setDuration(mAnimationTime).setListener(null); } mVelocityTracker.recycle(); mVelocityTracker = null; mDownX = 0; mDownY = 0; mDownView = null; mDownViewProxy = null; mDownPosition = ListView.INVALID_POSITION; mSwiping = false; break; } case MotionEvent.ACTION_MOVE: { if (mVelocityTracker == null || mPaused) { break; } mVelocityTracker.addMovement(motionEvent); float deltaX = motionEvent.getRawX() - mDownX; float deltaY = motionEvent.getRawY() - mDownY; if (Math.abs(deltaX) > mSlop && Math.abs(deltaY) < Math.abs(deltaX) / 2) { mSwiping = true; mSwipingSlop = (deltaX > 0 ? mSlop : -mSlop); mListView.requestDisallowInterceptTouchEvent(true); // Cancel ListView's touch (un-highlighting the item) MotionEvent cancelEvent = MotionEvent.obtain(motionEvent); cancelEvent.setAction(MotionEvent.ACTION_CANCEL | (MotionEventCompat .getActionIndex(motionEvent) << MotionEventCompat.ACTION_POINTER_INDEX_SHIFT)); mListView.onTouchEvent(cancelEvent); cancelEvent.recycle(); } if (mSwiping) { mDownViewProxy.setTranslationX(deltaX - mSwipingSlop); mDownViewProxy.setAlpha(Math.max(0f, Math.min(1f, 1f - 2f * Math.abs(deltaX) / mViewWidth))); return true; } break; } } return false; }
From source file:com.freegeek.android.materialbanner.view.indicator.CirclePageIndicator.java
public boolean onTouchEvent(MotionEvent ev) { if (super.onTouchEvent(ev)) { return true; }//w w w.j a v a 2 s .c o m if ((mViewPager == null) || (mViewPager.getAdapter().getCount() == 0)) { return false; } final int action = ev.getAction() & MotionEventCompat.ACTION_MASK; switch (action) { case MotionEvent.ACTION_DOWN: mActivePointerId = MotionEventCompat.getPointerId(ev, 0); mLastMotionX = ev.getX(); break; case MotionEvent.ACTION_MOVE: { final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final float deltaX = x - mLastMotionX; if (!mIsDragging) { if (Math.abs(deltaX) > mTouchSlop) { mIsDragging = true; } } if (mIsDragging) { mLastMotionX = x; if (mViewPager.isFakeDragging() || mViewPager.beginFakeDrag()) { mViewPager.fakeDragBy(deltaX); } } break; } case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: if (!mIsDragging) { final int count = mViewPager.getAdapter().getCount(); final int width = getWidth(); final float halfWidth = width / 2f; final float sixthWidth = width / 6f; if ((mCurrentPage > 0) && (ev.getX() < halfWidth - sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage - 1); } return true; } else if ((mCurrentPage < count - 1) && (ev.getX() > halfWidth + sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage + 1); } return true; } } mIsDragging = false; mActivePointerId = INVALID_POINTER; if (mViewPager.isFakeDragging()) mViewPager.endFakeDrag(); break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); mLastMotionX = MotionEventCompat.getX(ev, index); mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } case MotionEventCompat.ACTION_POINTER_UP: final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); } mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } return true; }
From source file:com.gitstudy.rili.liarbry.CalendarLayout.java
@Override public boolean onInterceptTouchEvent(MotionEvent ev) { if (isAnimating) { return true; }/*from w w w . j a v a 2 s . co m*/ if (mGestureMode == GESTURE_MODE_DISABLED) { return false; } if (mYearView == null || mContentView == null || mContentView.getVisibility() != VISIBLE) { return super.onInterceptTouchEvent(ev); } if (mCalendarShowMode == CALENDAR_SHOW_MODE_ONLY_MONTH_VIEW || mCalendarShowMode == CALENDAR_SHOW_MODE_ONLY_WEEK_VIEW) { return false; } if (mYearView.getVisibility() == VISIBLE || mDelegate.isShowYearSelectedLayout) { return super.onInterceptTouchEvent(ev); } final int action = ev.getAction(); float y = ev.getY(); switch (action) { case MotionEvent.ACTION_DOWN: int index = MotionEventCompat.getActionIndex(ev); mActivePointerId = MotionEventCompat.getPointerId(ev, index); mLastY = downY = y; break; case MotionEvent.ACTION_MOVE: float dy = y - mLastY; /* ?ViewPager?? */ if (dy < 0 && mContentView.getTranslationY() == -mContentViewTranslateY) { return false; } /* * ? 2 ?? yViewPager * 1?RecyclerView ViewmContentView * 2?? */ if (dy > 0 && mContentView.getTranslationY() == -mContentViewTranslateY && y >= CalendarUtil.dipToPx(getContext(), 98)) { if (!isScrollTop()) { return false; } } if (dy > 0 && mContentView.getTranslationY() == 0 && y >= CalendarUtil.dipToPx(getContext(), 98)) { return false; } if (Math.abs(dy) > mTouchSlop) {//mTouchSlopContentViewViewPagerCANCEL if ((dy > 0 && mContentView.getTranslationY() <= 0) || (dy < 0 && mContentView.getTranslationY() >= -mContentViewTranslateY)) { mLastY = y; return true; } } break; } return super.onInterceptTouchEvent(ev); }
From source file:com.github.lakeshire.pageindicator.CirclePageIndicator.java
public boolean onTouchEvent(MotionEvent ev) { if (super.onTouchEvent(ev)) { return true; }/*from ww w . ja v a2 s .co m*/ if ((mViewPager == null) || (mViewPager.getAdapter().getCount() == 0)) { return false; } if (realCount == 0) { return false; } final int action = ev.getAction() & MotionEventCompat.ACTION_MASK; switch (action) { case MotionEvent.ACTION_DOWN: mActivePointerId = MotionEventCompat.getPointerId(ev, 0); mLastMotionX = ev.getX(); break; case MotionEvent.ACTION_MOVE: { final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final float deltaX = x - mLastMotionX; if (!mIsDragging) { if (Math.abs(deltaX) > mTouchSlop) { mIsDragging = true; } } if (mIsDragging) { mLastMotionX = x; if (mViewPager.isFakeDragging() || mViewPager.beginFakeDrag()) { mViewPager.fakeDragBy(deltaX); } } break; } case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: if (!mIsDragging) { final int count = mViewPager.getAdapter().getCount(); final int width = getWidth(); final float halfWidth = width / 2f; final float sixthWidth = width / 6f; if ((mCurrentPage > 0) && (ev.getX() < halfWidth - sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage - 1); } return true; } else if ((mCurrentPage < count - 1) && (ev.getX() > halfWidth + sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage + 1); } return true; } } mIsDragging = false; mActivePointerId = INVALID_POINTER; if (mViewPager.isFakeDragging()) mViewPager.endFakeDrag(); break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); mLastMotionX = MotionEventCompat.getX(ev, index); mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } case MotionEventCompat.ACTION_POINTER_UP: final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); } mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } return true; }
From source file:com.kuloud.android.unity.ui.widget.steprefresh.PullToRefreshView.java
private void onSecondaryPointerUp(MotionEvent ev) { final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); }/* www . j a va2s .c o m*/ }
From source file:com.example.anumbrella.viewpager.LinePagerIndicator.java
/** * ?/* w ww. j a v a 2 s . c om*/ * * @param event * @return */ @Override public boolean onTouchEvent(MotionEvent event) { if (super.onTouchEvent(event)) { return true; } if ((mViewPager == null) || (mViewPager.getAdapter().getCount() == 0)) { return false; } /** * ACTION_POINTER_DOWN:?? * ACTION_POINTER_UP:??? * ACTION_MASK & ACTION ACTION_POINTER_DOWNACTION_POINTER_UP */ final int action = event.getAction() & MotionEventCompat.ACTION_MASK; switch (action) { case MotionEvent.ACTION_DOWN: //getPointerId0getPointerCount-1,,?0 mActivePointerId = MotionEventCompat.getPointerId(event, 0); mLastMotionX = event.getX(); break; case MotionEvent.ACTION_MOVE: //?pointer?index final int activePointerIndex = MotionEventCompat.findPointerIndex(event, mActivePointerId); //?pointerx? final float x = MotionEventCompat.getX(event, activePointerIndex); //?x?? final float deltaX = x - mLastMotionX; if (!isDragging) { if (Math.abs(deltaX) > mTouchSlop) { isDragging = true; } } if (isDragging) { mLastMotionX = x; if (mViewPager.isFakeDragging() || mViewPager.beginFakeDrag()) { mViewPager.fakeDragBy(deltaX); } } break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: //?? if (!isDragging) { final int count = mViewPager.getAdapter().getCount(); final int width = getWidth(); //?? final float halfWidth = width / 2f; final float sixthWidth = width / 6f; //,? if ((mCurrentPage > 0) && (event.getX() < halfWidth - sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage - 1); } return true; } else if ((mCurrentPage < count - 1) && (event.getX() > halfWidth + sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage + 1); } return true; } } isDragging = false; mActivePointerId = INVALID_POINTER; if (mViewPager.isFakeDragging()) { mViewPager.endFakeDrag(); } break; case MotionEventCompat.ACTION_POINTER_DOWN: final int index = MotionEventCompat.getActionIndex(event); mLastMotionX = MotionEventCompat.getX(event, index); mActivePointerId = MotionEventCompat.getPointerId(event, index); break; case MotionEventCompat.ACTION_POINTER_UP: final int pointerIndex = MotionEventCompat.getActionIndex(event); final int pointerId = MotionEventCompat.getPointerId(event, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(event, newPointerIndex); } mLastMotionX = MotionEventCompat.getX(event, MotionEventCompat.findPointerIndex(event, mActivePointerId)); break; } return true; }
From source file:com.bolaa.medical.view.banner.CirclePageIndicator.java
public boolean onTouchEvent(MotionEvent ev) { if (super.onTouchEvent(ev)) { return true; }/*from w ww . j a v a 2 s . c o m*/ if ((mViewPager == null) || (mViewPager.getAdapter().getCount() == 0)) { return false; } final int action = ev.getAction(); switch (action & MotionEventCompat.ACTION_MASK) { case MotionEvent.ACTION_DOWN: mActivePointerId = MotionEventCompat.getPointerId(ev, 0); mLastMotionX = ev.getX(); break; case MotionEvent.ACTION_MOVE: { final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final float deltaX = x - mLastMotionX; if (!mIsDragging) { if (Math.abs(deltaX) > mTouchSlop) { mIsDragging = true; } } if (mIsDragging) { if (!mViewPager.isFakeDragging()) { mViewPager.beginFakeDrag(); } mLastMotionX = x; // tyl ?beginFakeDrag()false,pagermFakeDragging???, // ?isFakeDragging()?false??fakeDragBy() if (mViewPager != null && mViewPager.isFakeDragging()) { try { mViewPager.fakeDragBy(deltaX); } catch (NullPointerException e) { LogUtil.w(e); return true; } } } break; } case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: if (!mIsDragging) { final int count = mViewPager.getAdapter().getCount(); final int width = getWidth(); final float halfWidth = width / 2f; final float sixthWidth = width / 6f; if ((mCurrentPage > 0) && (ev.getX() < halfWidth - sixthWidth)) { mViewPager.setCurrentItem(mCurrentPage - 1); return true; } else if ((mCurrentPage < count - 1) && (ev.getX() > halfWidth + sixthWidth)) { mViewPager.setCurrentItem(mCurrentPage + 1); return true; } } mIsDragging = false; mActivePointerId = INVALID_POINTER; if (mViewPager != null && mViewPager.isFakeDragging()) mViewPager.endFakeDrag(); break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); final float x = MotionEventCompat.getX(ev, index); mLastMotionX = x; mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } case MotionEventCompat.ACTION_POINTER_UP: final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); } mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } return true; }
From source file:com.taobao.luaview.view.indicator.circle.CirclePageIndicator.java
public boolean onTouchEvent(MotionEvent ev) { if (super.onTouchEvent(ev)) { return true; }//from ww w. j a v a2 s .c o m if ((mViewPager == null) || (getActualCount() == 0)) { return false; } final int action = ev.getAction() & MotionEventCompat.ACTION_MASK; switch (action) { case MotionEvent.ACTION_DOWN: mActivePointerId = MotionEventCompat.getPointerId(ev, 0); mLastMotionX = ev.getX(); break; case MotionEvent.ACTION_MOVE: { final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final float deltaX = x - mLastMotionX; if (!mIsDragging) { if (Math.abs(deltaX) > mTouchSlop) { mIsDragging = true; } } if (mIsDragging) { mLastMotionX = x; if (mViewPager.isFakeDragging() || mViewPager.beginFakeDrag()) { mViewPager.fakeDragBy(deltaX); } } break; } case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: if (!mIsDragging) { final int count = getActualCount(); final int width = getWidth(); final float halfWidth = width / 2f; final float sixthWidth = width / 6f; if ((mCurrentPage > 0) && (ev.getX() < halfWidth - sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage - 1); } return true; } else if ((mCurrentPage < count - 1) && (ev.getX() > halfWidth + sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage + 1); } return true; } } mIsDragging = false; mActivePointerId = INVALID_POINTER; if (mViewPager.isFakeDragging()) { //fix monkey bug try { mViewPager.endFakeDrag(); } catch (NullPointerException e) { e.printStackTrace(); } } break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); mLastMotionX = MotionEventCompat.getX(ev, index); mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } case MotionEventCompat.ACTION_POINTER_UP: final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); } mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } return true; }
From source file:com.icloud.listenbook.base.view.viewpagerindicator.CirclePageIndicator.java
public boolean onTouchEvent(android.view.MotionEvent ev) { if (super.onTouchEvent(ev)) { return true; }//from www . ja v a 2 s . c o m if ((mViewPager == null) || (mViewPager.getAdapter().getCount() == 0)) { return false; } final int action = ev.getAction() & MotionEventCompat.ACTION_MASK; switch (action) { case MotionEvent.ACTION_DOWN: mActivePointerId = MotionEventCompat.getPointerId(ev, 0); mLastMotionX = ev.getX(); break; case MotionEvent.ACTION_MOVE: { final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final float deltaX = x - mLastMotionX; if (!mIsDragging) { if (Math.abs(deltaX) > mTouchSlop) { mIsDragging = true; } } if (mIsDragging) { mLastMotionX = x; if (mViewPager.isFakeDragging() || mViewPager.beginFakeDrag()) { mViewPager.fakeDragBy(deltaX); } } break; } case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: if (!mIsDragging) { final int count = mViewPager.getAdapter().getCount(); final int width = getWidth(); final float halfWidth = width / 2f; final float sixthWidth = width / 6f; /* * ?? ?? ?? .???? * * ? */ if ((mCurrentPage > 0) && (ev.getX() < halfWidth - sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage - 1); } return true; } else if ((mCurrentPage < count - 1) && (ev.getX() > halfWidth + sixthWidth)) { if (action != MotionEvent.ACTION_CANCEL) { mViewPager.setCurrentItem(mCurrentPage + 1); } return true; } } mIsDragging = false; mActivePointerId = INVALID_POINTER; if (mViewPager.isFakeDragging()) mViewPager.endFakeDrag(); break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); mLastMotionX = MotionEventCompat.getX(ev, index); mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } case MotionEventCompat.ACTION_POINTER_UP: final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); } mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } return true; }
From source file:com.bolaa.medical.view.banner.LoopCirclePageIndicator.java
public boolean onTouchEvent(MotionEvent ev) { if (super.onTouchEvent(ev)) { return true; }/*from w ww .java 2s . com*/ if ((mViewPager == null) || (mViewPager.getAdapter().getCount() == 0)) { return false; } final int action = ev.getAction(); switch (action & MotionEventCompat.ACTION_MASK) { case MotionEvent.ACTION_DOWN: // invalidate(); mActivePointerId = MotionEventCompat.getPointerId(ev, 0); mLastMotionX = ev.getX(); break; case MotionEvent.ACTION_MOVE: { final int activePointerIndex = MotionEventCompat.findPointerIndex(ev, mActivePointerId); final float x = MotionEventCompat.getX(ev, activePointerIndex); final float deltaX = x - mLastMotionX; if (!mIsDragging) { if (Math.abs(deltaX) > mTouchSlop) { mIsDragging = true; } } if (mIsDragging) { if (!mViewPager.isFakeDragging()) { mViewPager.beginFakeDrag(); } mLastMotionX = x; // tyl ?beginFakeDrag()false,pagermFakeDragging???, // ?isFakeDragging()?false??fakeDragBy() if (mViewPager != null && mViewPager.isFakeDragging()) { mViewPager.fakeDragBy(deltaX); } } break; } case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: if (!mIsDragging) { final int count = mViewPager.getAdapter().getCount(); final int width = getWidth(); final float halfWidth = width / 2f; final float sixthWidth = width / 6f; if ((mCurrentPage > 0) && (ev.getX() < halfWidth - sixthWidth)) { mViewPager.setCurrentItem(mCurrentPage - 1); return true; } else if ((mCurrentPage < count - 1) && (ev.getX() > halfWidth + sixthWidth)) { mViewPager.setCurrentItem(mCurrentPage + 1); return true; } } mIsDragging = false; mActivePointerId = INVALID_POINTER; if (mViewPager != null && mViewPager.isFakeDragging()) mViewPager.endFakeDrag(); break; case MotionEventCompat.ACTION_POINTER_DOWN: { final int index = MotionEventCompat.getActionIndex(ev); final float x = MotionEventCompat.getX(ev, index); mLastMotionX = x; mActivePointerId = MotionEventCompat.getPointerId(ev, index); break; } case MotionEventCompat.ACTION_POINTER_UP: final int pointerIndex = MotionEventCompat.getActionIndex(ev); final int pointerId = MotionEventCompat.getPointerId(ev, pointerIndex); if (pointerId == mActivePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mActivePointerId = MotionEventCompat.getPointerId(ev, newPointerIndex); } mLastMotionX = MotionEventCompat.getX(ev, MotionEventCompat.findPointerIndex(ev, mActivePointerId)); break; } return true; }