Java 类android.support.v7.widget.PagerSnapHelper 实例源码

项目：qmui 文件：QDSnapHelperFragment.java

@Override
protected View onCreateView() {
    View root = LayoutInflater.from(getContext()).inflate(R.layout.fragment_pagerlayoutmanager, null);
    ButterKnife.bind(this, root);

    mQDItemDescription = QDDataManager.getInstance().getDescription(this.getClass());
    initTopBar();

    mRecyclerView = new RecyclerView(getContext());
    mPagerLayoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false);
    mRecyclerView.setLayoutManager(mPagerLayoutManager);
    mRecyclerViewAdapter = new QDRecyclerViewAdapter();
    mRecyclerViewAdapter.setItemCount(10);
    mRecyclerView.setAdapter(mRecyclerViewAdapter);
    mPagerWrap.addView(mRecyclerView);
    // PagerSnapHelper每次只能滚动一个item;用LinearSnapHelper则可以一次滚动多个，并最终保证定位
    // mSnapHelper = new LinearSnapHelper();
    mSnapHelper = new PagerSnapHelper();
    mSnapHelper.attachToRecyclerView(mRecyclerView);
    return root;
}

项目：QMUI_Android 文件：QDSnapHelperFragment.java

@Override
protected View onCreateView() {
    View root = LayoutInflater.from(getContext()).inflate(R.layout.fragment_pagerlayoutmanager, null);
    ButterKnife.bind(this, root);

    mQDItemDescription = QDDataManager.getInstance().getDescription(this.getClass());
    initTopBar();

    mRecyclerView = new RecyclerView(getContext());
    mPagerLayoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false);
    mRecyclerView.setLayoutManager(mPagerLayoutManager);
    mRecyclerViewAdapter = new QDRecyclerViewAdapter();
    mRecyclerViewAdapter.setItemCount(10);
    mRecyclerView.setAdapter(mRecyclerViewAdapter);
    mPagerWrap.addView(mRecyclerView);
    // PagerSnapHelper每次只能滚动一个item;用LinearSnapHelper则可以一次滚动多个，并最终保证定位
    // mSnapHelper = new LinearSnapHelper();
    mSnapHelper = new PagerSnapHelper();
    mSnapHelper.attachToRecyclerView(mRecyclerView);
    return root;
}

项目：mobile-buy-sdk-android 文件：ImageGalleryView.java

private void initPagerView() {
  pagerView.setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.HORIZONTAL, false));
  pagerView.setHasFixedSize(true);
  pagerView.setAdapter(pagerAdapter);
  new PagerSnapHelper().attachToRecyclerView(pagerView);

  pagerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override public void onScrolled(final RecyclerView recyclerView, final int dx, final int dy) {
      int index = ((LinearLayoutManager) pagerView.getLayoutManager()).findFirstVisibleItemPosition();
      View pagerItemView = ImageGalleryView.this.pagerView.getLayoutManager().findViewByPosition(index);

      index = ((LinearLayoutManager) pagerIndicatorView.getLayoutManager()).findFirstVisibleItemPosition();
      View pagerIndicatorItemView = pagerIndicatorView.getLayoutManager().findViewByPosition(index);

      float offset = 1f * dx / (pagerView.getAdapter().getItemCount() * pagerItemView.getWidth());
      pagerIndicatorFrameView.setTranslationX(pagerIndicatorFrameView.getTranslationX()
        + offset * pagerIndicatorItemView.getWidth() * pagerIndicatorView.getAdapter().getItemCount());
    }
  });
}

项目：recyclerviewItemDecorations 文件：ViewPagerActivity.java

@Override
public void onCreateRecyclerView(Bundle savedInstanceState) {
  int backgroundColor = 0xFF665F30;
  Context context = this;
  recyclerView.getLayoutParams().height = ViewGroup.LayoutParams.WRAP_CONTENT;
  recyclerView.setBackgroundColor(backgroundColor);

  SimpleViewAdapter adapter = new SimpleViewAdapter(5, R.layout.item_view_pager_page);

  recyclerView.setAdapter(adapter);
  recyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));

  // add pager behavior
  PagerSnapHelper snapHelper = new PagerSnapHelper();
  snapHelper.attachToRecyclerView(recyclerView);

  // pager indicator
  recyclerView.addItemDecoration(new LinePagerIndicatorDecoration());

}

项目：ExpandRecyclerView 文件：RecyclerViewStyleHelper.java

/**
 * transform to ViewPager
 *
 * @param recyclerView {@link RecyclerView}
 * @param orientation  the orientation of Linearlayout
 */
public static void toViewPager(RecyclerView recyclerView
        , @LinearLayoutCompat.OrientationMode int orientation) {
    recyclerView.setLayoutManager(new LinearLayoutManager(recyclerView.getContext()
            , orientation, false));
    new PagerSnapHelper().attachToRecyclerView(recyclerView);
}

项目：recyclviewpagger 文件：MetalRecyclerViewPager.java

private void init(Context context, @Nullable AttributeSet attrs) {
    if (attrs != null) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MetalRecyclerViewPager, 0, 0);
        itemMargin = (int) typedArray.getDimension(R.styleable.MetalRecyclerViewPager_itemMargin, 0f);
        typedArray.recycle();
    }

    setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
    SnapHelper snapHelper = new PagerSnapHelper();
    snapHelper.attachToRecyclerView(this);
}

项目：recycler-view-pager 文件：RecyclerViewPager.java

public RecyclerViewPager(Context context, @Nullable AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    mLayoutManager = new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false);
    setLayoutManager(mLayoutManager);
    new PagerSnapHelper().attachToRecyclerView(this);

    final float density = context.getResources().getDisplayMetrics().density;
    mDefaultGutterSize = (int) (DEFAULT_GUTTER_SIZE * density);

    mTouchSlop = ViewConfiguration.get(context).getScaledPagingTouchSlop();
}

项目：MetalRecyclerPagerView 文件：MetalRecyclerViewPager.java

private void init(Context context, @Nullable AttributeSet attrs) {
    if (attrs != null) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MetalRecyclerViewPager, 0, 0);
        itemMargin = (int) typedArray.getDimension(R.styleable.MetalRecyclerViewPager_itemMargin, 0f);
        typedArray.recycle();
    }

    setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
    SnapHelper snapHelper = new PagerSnapHelper();
    snapHelper.attachToRecyclerView(this);
}

项目：RetroMusicPlayer 文件：MetalRecyclerViewPager.java

private void init(Context context, @Nullable AttributeSet attrs) {
    if (attrs != null) {
        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MetalRecyclerViewPager, 0, 0);
        itemMargin = (int) typedArray.getDimension(R.styleable.MetalRecyclerViewPager_itemMargin, 0f);
        typedArray.recycle();
    }

    setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
    SnapHelper snapHelper = new PagerSnapHelper();
    snapHelper.attachToRecyclerView(this);
}

项目：Recyclerview-Gallery 文件：ScrollManager.java

/**
 * 初始化SnapHelper
 *
 * @param helper
 */
public void initSnapHelper(int helper) {
    switch (helper) {
        case GalleryRecyclerView.LinearySnapHelper:
            mLinearySnapHelper = new LinearSnapHelper();
            mLinearySnapHelper.attachToRecyclerView(mGalleryRecyclerView);
            break;
        case GalleryRecyclerView.PagerSnapHelper:
            mPagerSnapHelper = new PagerSnapHelper();
            mPagerSnapHelper.attachToRecyclerView(mGalleryRecyclerView);
            break;
    }
}

项目：MangoBloggerAndroidApp 文件：HomeBaseAdapter.java

@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
    HomeGroup snap = mSnaps.get(position);
    holder.snapTextView.setText(snap.getText());

    if (snap.getGravity() == Gravity.START || snap.getGravity() == Gravity.END) {
        holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder
                .recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
        holder.recyclerView.setOnFlingListener(null);
        new GravitySnapHelper(snap.getGravity(), false, this).attachToRecyclerView(holder.recyclerView);
    } else if (snap.getGravity() == Gravity.CENTER_HORIZONTAL) {
        holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder
                .recyclerView.getContext(), snap.getGravity() == Gravity.CENTER_HORIZONTAL ?
                LinearLayoutManager.HORIZONTAL : LinearLayoutManager.VERTICAL, false));
        holder.recyclerView.setOnFlingListener(null);
        new LinearSnapHelper().attachToRecyclerView(holder.recyclerView);
    } else if (snap.getGravity() == Gravity.CENTER) { // Pager snap
        holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder
                .recyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
        holder.recyclerView.setOnFlingListener(null);
        new PagerSnapHelper().attachToRecyclerView(holder.recyclerView);
    } else { // Top / Bottom
        holder.recyclerView.setLayoutManager(new LinearLayoutManager(holder
                .recyclerView.getContext()));
        holder.recyclerView.setOnFlingListener(null);
        new GravitySnapHelper(snap.getGravity()).attachToRecyclerView(holder.recyclerView);
    }

    HomeItemAdapter itemAdapter = new HomeItemAdapter(mContext, snap.getCardSize(), snap.getApps());
    holder.recyclerView.setAdapter(itemAdapter);
    itemAdapter.setOnItemClickListener(new HomeItemAdapter.OnItemClickListener() {
        @Override
        public void itemClick(HomeItem item, int Position) {
            if(mContext instanceof HomeActivity) {
                if(item.isWebView()) {
                    ((HomeActivity) mContext).attachFragment(WebFragment.newInstance(item.getUrl(), item.getName()), true);
                } else {
                    ((HomeActivity) mContext).attachFragment(FirebaseListFragment.newInstance(item.getUrl(), item.getExtra()), true);
                }
            }
        }
    });

}