android.support.v4.view.ViewPager#SCROLL_STATE_IDLE源码实例Demo

@Override
public void onPageScrollStateChanged(int state)
  {
  final ViewPager currentMaster=masterRef.get();
  if(currentMaster==viewPager2)
    return;
  switch(state)
    {
    case ViewPager.SCROLL_STATE_DRAGGING:
      if(currentMaster==null)
        masterRef.set(viewPager);
      break;
    case ViewPager.SCROLL_STATE_SETTLING:
      if(mLastPos!=viewPager2.getCurrentItem())
        viewPager2.setCurrentItem(viewPager.getCurrentItem(),false);
      break;
    case ViewPager.SCROLL_STATE_IDLE:
      masterRef.set(null);
      viewPager2.setCurrentItem(viewPager.getCurrentItem(),false);
      mLastPos=-1;
      break;
    }
  }
 

@Override
public void onPageScrollStateChanged(int state) {
	if (state == ViewPager.SCROLL_STATE_IDLE) {
		scrollToChild(pager.getCurrentItem(), 0);
	}

	if (delegatePageListener != null) {
		delegatePageListener.onPageScrollStateChanged(state);
	}
}
 

@Override
public void onPageScrollStateChanged(int state) {
    if (state == ViewPager.SCROLL_STATE_IDLE) {
        scrollToChild(pager.getCurrentItem(), 0);
    }

    if (delegatePageListener != null) {
        delegatePageListener.onPageScrollStateChanged(state);
    }
}
 

@Override
public void onPageSelected(int position) {
    if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mCurrentPage = position;
        invalidate();
    }

    if (mListener != null) {
        mListener.onPageSelected(position);
    }
}
 

@Override
public void onPageScrollStateChanged(int state) {
	if (state == ViewPager.SCROLL_STATE_IDLE) {
		scrollToChild(pager.getCurrentItem(), 0);
	}

	if (delegatePageListener != null) {
		delegatePageListener.onPageScrollStateChanged(state);
	}
}
 

@Override
public void onPageSelected(int position) {
    if (mSnap || mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mCurrentPage = position;
        mSnapPage = position;
        invalidate();
    }

    if (mListener != null) {
        mListener.onPageSelected(position);
    }
}
 

@Override
public void onPageScrollStateChanged(int state) {
    mCurrState = state;
    if (mCurrState == ViewPager.SCROLL_STATE_IDLE) {
        if (mCallback != null) {
            mCallback.onTransitionToIdle();
        }
    }
}
 

@Override
public void onPageSelected(int position) {
    if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mTabStrip.onViewPagerPageChanged(position, 0f);
        scrollToTab(position, 0);
    }
    for (int i = 0; i < mTabStrip.getChildCount(); i++) {
        mTabStrip.getChildAt(i).setSelected(position == i);
    }
    if (mViewPagerPageChangeListener != null) {
        mViewPagerPageChangeListener.onPageSelected(position);
    }
}
 

@Override
public void onPageSelected(int position) {
    if (mSnap || mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mCurrentPage = position;
        mSnapPage = position;
        invalidate();
    }

    if (mListener != null) {
        mListener.onPageSelected(position);
    }
}
 

@Override public void onPageScrollStateChanged(int state) {
    if (state == ViewPager.SCROLL_STATE_IDLE) {
        scrollToChild(EasySlidingTabs.this.pager.getCurrentItem(), 0);
    }

    if (EasySlidingTabs.this.delegatePageListener != null) {
        EasySlidingTabs.this.delegatePageListener.onPageScrollStateChanged(state);
    }
}
 

@Override
public void onPageScrollStateChanged(int state) {
    if (state == ViewPager.SCROLL_STATE_IDLE) {
        scrollToChild(pager.getCurrentItem(), 0);
    }

    if (delegatePageListener != null) {
        delegatePageListener.onPageScrollStateChanged(state);
    }
}
 

@Override
public void onPageSelected(int position) {
    if (mSnap || mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mCurrentPage = position;
        mSnapPage = position;
        invalidate();
    }

    if (mListener != null) {
        mListener.onPageSelected(position);
    }
}
 

@Override
public boolean onTouchEvent(final MotionEvent event) {
    // Return if animation is running
    if (mAnimator.isRunning()) return true;
    // If is not idle state, return
    if (mScrollState != ViewPager.SCROLL_STATE_IDLE) return true;

    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            // Action down touch
            mIsActionDown = true;
            if (!mIsViewPagerMode) break;
            // Detect if we touch down on tab, later to move
            mIsTabActionDown = (int) (event.getX() / mTabSize) == mIndex;
            break;
        case MotionEvent.ACTION_MOVE:
            // If tab touched, so move
            if (mIsTabActionDown) {
                mViewPager.setCurrentItem((int) (event.getX() / mTabSize), true);
                break;
            }
            if (mIsActionDown) break;
        case MotionEvent.ACTION_UP:
            // Press up and set tab index relative to current coordinate
            if (mIsActionDown) setTabIndex((int) (event.getX() / mTabSize));
        case MotionEvent.ACTION_CANCEL:
        case MotionEvent.ACTION_OUTSIDE:
        default:
            // Reset action touch variables
            mIsTabActionDown = false;
            mIsActionDown = false;
            break;
    }

    return true;
}
 

@Override
public void onPageSelected(int position) {
    if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mTabStrip.onViewPagerPageChanged(position, 0f);
        scrollToTab(position, 0);
    }

    if (mViewPagerPageChangeListener != null) {
        mViewPagerPageChangeListener.onPageSelected(position);
    }
}
 

@Override
public void onPageScrollStateChanged(int state) {
    if (mAdapter != null) {
        int position = LoopViewPager.super.getCurrentItem();
        int realPosition = mAdapter.toRealPosition(position);
        if (state == ViewPager.SCROLL_STATE_IDLE
                && (position == 0 || position == mAdapter.getCount() - 1)) {
            setCurrentItem(realPosition, false);
        }
    }
    if (mOuterPageChangeListener != null) {
        mOuterPageChangeListener.onPageScrollStateChanged(state);
    }
}
 

@Override
public void onPageScrollStateChanged(int state)
{
    if (state == ViewPager.SCROLL_STATE_IDLE)
        scrollToChild(pager.getCurrentItem(), 0);

    if (delegatePageListener != null)
        delegatePageListener.onPageScrollStateChanged(state);
}
 

@Override
public void onPageScrollStateChanged(int state) {
	if (state == ViewPager.SCROLL_STATE_IDLE) {
		scrollToChild(pager.getCurrentItem(), 0);
	}

	if (delegatePageListener != null) {
		delegatePageListener.onPageScrollStateChanged(state);
	}
}
 

@Override
public void onPageSelected(int position) {
    if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mTabStrip.onViewPagerPageChanged(position, 0f);
        scrollToTab(position, 0);
    }

    if (mViewPagerPageChangeListener != null) {
        mViewPagerPageChangeListener.onPageSelected(position);
    }
}
 

@Override
public void onPageScrollStateChanged(int state) {
	if (state == ViewPager.SCROLL_STATE_IDLE) {
		onPageScrolled(getCurrentItem(), 0, 0);
	}
}
 

@Override
public void onPageScrollStateChanged(int state) {
    isSwitching = state != ViewPager.SCROLL_STATE_IDLE;
}