Android Cycle ViewPager

实现
主要通过实现BaseCycleFragmentStatePagerAdapter，使得item的个数比原来的item多两个。比如有A>B>C>D四个item，然后将最后一个(D)复制一份放到首位，将第一个(A)复制一份放到末尾，就成了D>A>B>C>D>A六个item。但需要注意的是，当数据源大于1的时候，必须将ViewPager current item 设为1，因为ViewPager默认显示为0.

最主要的是边界时滑动的处理，当ViewPager在1（A）的时候，向左滑动，此时ViewPager显示的D, position=0,如果不处理的话，那么就没办法继续向左滑动，所以ViewPager.setCurrentItem(4, false); 同样的当ViewPager在4（D）的时候，向右滑动，将ViewPager.setCurrentItem(1, false);

Current Problem

just support FragmentStatePagerAdapter

Usage

Step 1

JitPack
1.在项目外层的build.gradle中添加JitPack仓库

repositories {
      // ...
      maven { url "https://jitpack.io" }
  }

2.在用到的项目中添加依赖

dependencies {
          compile 'com.github.cock-tail:CircleViewPager:1.0'
  }

Jcenter
已经通过jcenter的审核了，但是不知道为什么不行，建议用上面

compile 'com.wpy.circleviewpager:library:1.0.0@aar'

Step 2

layout

<android.support.v4.view.ViewPager
            android:id="@+id/view_pager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

use default indicators

<com.wpy.cycleviewpager.Indicator.PagerIndicator
            android:id="@+id/pagerIndicator"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:layout_marginBottom="@dimen/dp_40"
            android:gravity="center"
            app:selected_color="#bf1900"
            app:shape="oval"
            app:unselected_color="@android:color/darker_gray"/>

extends BaseCycleFragmentStatePagerAdapter

public class CycleViewStatePagerAdapter extends BaseCycleFragmentStatePagerAdapter<Images> {

    private final Context mContext;

    public CycleViewStatePagerAdapter(Context context, FragmentManager fm) {
        super(fm);
        mContext = context;
    }

    public CycleViewStatePagerAdapter(final Context context, FragmentManager fragmentManager, List<Images> images) {
        super(fragmentManager, images);
        this.mContext = context;
    }

    @Override
    protected Fragment getItemFragment(Images images, int position) {
        return ViewPagerItemFragment.instantiateWithArgs(mContext, images);
    }
}

Step 3

mCycleViewStatePagerAdapter = new CycleViewStatePagerAdapter(this, getSupportFragmentManager());
mViewPager.setAdapter(mCycleViewStatePagerAdapter);

mBaseCyclePageChangeListener = new BaseCyclePageChangeListener(mViewPager);
mBaseCyclePageChangeListener.setOnPageChangeListener(createOnPageChangeListener());
mViewPager.addOnPageChangeListener(mBaseCyclePageChangeListener);

Or if you use default indicators

mCycleViewStatePagerAdapter = new CycleViewStatePagerAdapter(this, getSupportFragmentManager());
mViewPager.setAdapter(mCycleViewStatePagerAdapter);

mPagerIndicator.setViewPager(mViewPager);
mPagerIndicator.redraw();

Step 4

Auto Scroll

mBaseCyclePageChangeListener.startAutoScroll();

mPagerIndicator.setAutoScroll();

Thanks

CircularViewPager

AndroidImageSlider

About

if you have any problems when using this library, you can write to me wpy0830@gmail.com

wangpeiyuan/CircleViewPager