android.support.v7.widget.RecyclerView Java Examples

@Override
public boolean onItemLongClick(RecyclerView parent, View view, int position, long id) {

    int viewType = mWatchMeAdapter.getItemViewType(position);

    switch (viewType){
        case WatchMeAdapterNew.TYPE_HEADER_FIRST:
            getJobManager().addJob(new FetchAvailableVideoQualities("p3xpwfHm"));
            return true;

        case WatchMeAdapterNew.TYPE_VIDEO:
        case WatchMeAdapterNew.TYPE_VIDEO_LAST:

            mSelectedVideoPosition = position;

            PopupMenu popupMenu = new PopupMenu(view.getContext(), view, Gravity.TOP);
            popupMenu.setOnMenuItemClickListener(mOnMenuItemClickListener);
            popupMenu.inflate(R.menu.video_item_menu);
            popupMenu.show();
            return true;
    }

    return false;
}
 

public SmartRecycleView setLayoutManger(LayoutManagerType layoutManagerType, int orientation, int spanCout) {
    RecyclerView.LayoutManager layoutManager = null;
    if (layoutManagerType == LayoutManagerType.LINEAR_LAYOUT) {
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext);
        linearLayoutManager.setOrientation(orientation);
        layoutManager = linearLayoutManager;
    } else if (layoutManagerType == LayoutManagerType.GRID_LAYOUT) {
        GridLayoutManager gridLayoutManager = new GridLayoutManager(mContext, spanCout);
        gridLayoutManager.setOrientation(orientation);
        layoutManager = gridLayoutManager;
    } else if (layoutManagerType == LayoutManagerType.STAGGER_LAYOUT) {
        StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(spanCout, orientation);
        layoutManager = staggeredGridLayoutManager;
    }
    mRecyclerView.setLayoutManager(layoutManager);
    return this;
}
 

private static Matcher<View> orderMatcher() {
    return new TypeSafeMatcher<View>() {
        @Override
        public void describeTo(Description description) {
            description.appendText("with correct position order");
        }

        @Override
        public boolean matchesSafely(View v) {
            RecyclerView view = (RecyclerView) v;
            if (view.getLayoutManager() == null) return false;
            ChildViewsIterable childViews = new ChildViewsIterable(view.getLayoutManager());
            int pos = view.getChildAdapterPosition(childViews.iterator().next());
            for (View child : childViews) {
                if (pos != view.getChildAdapterPosition(child)) {
                    return false;
                }
                pos ++;
            }
            return true;
        }
    };
}
 

@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
    super.onAttachedToRecyclerView(recyclerView);
    LayoutManager layoutManager = recyclerView.getLayoutManager();

    if (layoutManager instanceof GridLayoutManager) {
        GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        final int spanCount = gridLayoutManager.getSpanCount();
        gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                // 如果当前是footer的位置，那么该item占据一行的个单元格，正常情况下占据1个单元格
                if (getItemViewType(position) == FOOTER_TYPE) {
                    return spanCount;
                } else if (isRefreshHeader(position) || getItemViewType(position) == getHeaderTypeByPosition(position - 1)) {
                    return spanCount;
                } else {
                    return 1;
                }
            }
        });
    }
    mAdapter.onAttachedToRecyclerView(recyclerView);
}
 

/**
 * @return The final offset amount for children
 */
private int fixLayoutEndGapExpose(int endOffset, RecyclerView.Recycler recycler,
                                  RecyclerView.State state, boolean canOffsetChildren) {
    int gap = mOrientationHelper.getEndAfterPadding() - endOffset;
    int fixOffset = 0;
    if (gap > 0) {
        fixOffset = -scrollInternalBy(-gap, recycler, state);
    } else {
        return 0; // nothing to fix
    }
    // move offset according to scroll amount
    endOffset += fixOffset;
    if (canOffsetChildren) {
        // re-calculate gap, see if we could fix it
        gap = mOrientationHelper.getEndAfterPadding() - endOffset;
        if (gap > 0) {
            mOrientationHelper.offsetChildren(gap);
            return gap + fixOffset;
        }
    }
    return fixOffset;
}
 

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    switch (holder.getItemViewType())
    {
        case header:
            configureRecyclerHead((HeaderRecyclerViewHolder)holder);
            break;
        case general_list_item:
            configureGeneralItem((MyRoutesItemViewHolder)holder,position);
            break;
        default:
            configureGeneralItem((MyRoutesItemViewHolder)holder,position);
            break;
    }

}
 

@Override
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
    loadMoreDelegate.attach(recyclerView);
    final RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
    if (layoutManager == null) {
        Log.e(TAG, "Cannot setSpanSizeLookup on a null LayoutManager Object. " +
                "Call setLayoutManager with a non-null argument.");
        return;
    }

    if (layoutManager instanceof GridLayoutManager) {
        ((GridLayoutManager) layoutManager).setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                Object obj = getItems().get(position);
                return obj.getClass().equals(LoadMoreItem.class) ? ((GridLayoutManager) layoutManager).getSpanCount() : 1;
            }
        });
    }
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    findViewById(R.id.btn_request).setOnClickListener(onClickListener);
    findViewById(R.id.btn_select_image).setOnClickListener(onClickListener);
    mTvResult = (TextView) findViewById(R.id.tv_result);
    mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
    mRecyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {
        @Override
        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            outRect.set(5, 5, 5, 5);
        }
    });
    mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3));

    int size = measureSize();
    mAdapter = new AlbumPreviewAdapter(this, size);
    mRecyclerView.setAdapter(mAdapter);
}
 

private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
                               int heightSpec, int[] measuredDimension) {

    View view = recycler.getViewForPosition(position);

    // For adding Item Decor Insets to view
    super.measureChildWithMargins(view, 0, 0);
    RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
    int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,
            getPaddingLeft() + getPaddingRight() + getDecoratedLeft(view) + getDecoratedRight(view), p.width);
    int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,
            getPaddingTop() + getPaddingBottom() + getPaddingBottom() + getDecoratedBottom(view), p.height);
    view.measure(childWidthSpec, childHeightSpec);

    // Get decorated measurements
    measuredDimension[0] = getDecoratedMeasuredWidth(view) + p.leftMargin + p.rightMargin;
    measuredDimension[1] = getDecoratedMeasuredHeight(view) + p.bottomMargin + p.topMargin;
    recycler.recycleView(view);
}
 

public void drawVertical(Canvas c, RecyclerView parent) {
    final int childCount = parent.getChildCount();
    LuRecyclerViewAdapter adapter = (LuRecyclerViewAdapter) parent.getAdapter();
    for (int i = 0; i < childCount; i++) {
        if (adapter.isHeader(i) || adapter.isFooter(i)) {
            c.drawRect(0, 0, 0, 0, mPaint);
        } else {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
            final int top = child.getTop();
            final int bottom = child.getBottom() + verticalSpace;
            final int left = child.getRight() + params.rightMargin;
            final int right = left + horizontalSpace;
            c.drawRect(left, top, right, bottom, mPaint);
        }

    }
}
 

private void addChildDrawingOrderCallback() {
    if (Build.VERSION.SDK_INT >= 21) {
        return;// we use elevation on Lollipop
    }
    if (mChildDrawingOrderCallback == null) {
        mChildDrawingOrderCallback = new RecyclerView.ChildDrawingOrderCallback() {
            @Override
            public int onGetChildDrawingOrder(int childCount, int i) {
                if (mOverdrawChild == null) {
                    return i;
                }
                int childPosition = mOverdrawChildPosition;
                if (childPosition == -1) {
                    childPosition = mRecyclerView.indexOfChild(mOverdrawChild);
                    mOverdrawChildPosition = childPosition;
                }
                if (i == childCount - 1) {
                    return childPosition;
                }
                return i < childPosition ? i : i + 1;
            }
        };
    }
    mRecyclerView.setChildDrawingOrderCallback(mChildDrawingOrderCallback);
}
 

@Override
public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
    createPinnedHeader(parent);

    if (mPinnedHeaderView != null) {
        int headerEndAt = mPinnedHeaderView.getTop() + mPinnedHeaderView.getHeight();
        View v = parent.findChildViewUnder(c.getWidth() / 2, headerEndAt + 1);

        if (isPinnedView(parent, v)) {
            mPinnedHeaderTop = v.getTop() - mPinnedHeaderView.getHeight();
        } else {
            mPinnedHeaderTop = 0;
        }

        mClipBounds = c.getClipBounds();
        mClipBounds.top = mPinnedHeaderTop + mPinnedHeaderView.getHeight();
        c.clipRect(mClipBounds);
    }
}
 

@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
    TabLayout tabLayout = this.mTabLayoutRef.get();
    final RecyclerViewPager viewPager = (RecyclerViewPager) recyclerView;
    final int pagerWidth = recyclerView.getWidth()
            - recyclerView.getPaddingLeft()
            - recyclerView.getPaddingRight();
    final View centerXChild = ViewUtils.getCenterXChild(viewPager);
    if (centerXChild == null) {
        return;
    }
    int centerChildPosition = viewPager.getChildAdapterPosition(centerXChild);
    float offset = mPagerLeftBeforeScroll - centerXChild.getLeft()
            + pagerWidth * (centerChildPosition - mPositionBeforeScroll);
    final float positionOffset = offset * 1f / pagerWidth;
    if (tabLayout != null) {
        if (positionOffset < 0) {
            try {
                tabLayout.setScrollPosition(mPositionBeforeScroll
                        + (int) Math.floor(positionOffset),
                    positionOffset - (int) Math.floor(positionOffset),
                    false);
            } catch (Throwable e) {
                e.printStackTrace();
            }
        } else {
            tabLayout.setScrollPosition(mPositionBeforeScroll + (int) (positionOffset),
                    positionOffset - (int) (positionOffset),
                    false);
        }
    }
    Log.d("test", "dx:" + positionOffset);
}
 

public void drawHorizontal(Canvas c, RecyclerView parent) {
    final int top = parent.getPaddingTop() + topMargin;
    final int bottom = parent.getHeight() - parent.getPaddingBottom() - bottomMargin;

    final int childCount = parent.getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = parent.getChildAt(i);
        final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                .getLayoutParams();
        final int left = child.getRight() + params.rightMargin + leftMargin;
        final int right = left + width;
        mDivider.setBounds(left, top, right, bottom);
        mDivider.draw(c);
    }
}
 

/**
 * Right recyclerView linkage left tabLayout
 * SCROLL_STATE_IDLE just call once
 *
 * @param newState RecyclerView new scroll state
 */
private void rightLinkageLeft(int newState) {
    if (newState == RecyclerView.SCROLL_STATE_IDLE) {
        if (isClickTab) {
            isClickTab = false;
            return;
        }
        int firstPosition = mManager.findFirstVisibleItemPosition();
        if (index != firstPosition) {
            index = firstPosition;
            setChecked(index);
        }
    }
}
 

@Override
public void onScrolled(RecyclerView view, int dx, int dy) {
    if (loadMoreListener != null) {
        int lastVisibleItemPosition = 0;
        int totalItemCount = mLayoutManager.getItemCount();

        if (mLayoutManager instanceof StaggeredGridLayoutManager) {
            int[] lastVisibleItemPositions = ((StaggeredGridLayoutManager) mLayoutManager).findLastVisibleItemPositions(null);
            lastVisibleItemPosition = getLastVisibleItem(lastVisibleItemPositions);
        } else if (mLayoutManager instanceof LinearLayoutManager) {
            lastVisibleItemPosition = ((LinearLayoutManager) mLayoutManager).findLastVisibleItemPosition();
        } else if (mLayoutManager instanceof GridLayoutManager) {
            lastVisibleItemPosition = ((GridLayoutManager) mLayoutManager).findLastVisibleItemPosition();
        }

        if (totalItemCount < previousTotalItemCount) {
            this.currentPage = 0;
            this.previousTotalItemCount = totalItemCount;
            if (totalItemCount == 0) {
                this.loading = true;
            }
        }

        if (loading && (totalItemCount > previousTotalItemCount)) {
            loading = false;
            previousTotalItemCount = totalItemCount;
        }

        int visibleThreshold = 5;
        if (!loading && (lastVisibleItemPosition + visibleThreshold) > totalItemCount) {
            currentPage++;
            loadMoreListener.onLoadMore(loadMoreListener.getMessagesCount(), totalItemCount);
            loading = true;
        }
    }
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_list, container, false);
    fab = (ButtonFloat) view.findViewById(R.id.new_edit_fab);
    fab.setOnClickListener(this);

    recyclerView = (RecyclerView) view.findViewById(R.id.list_recyclerview);
    initRecyclerView();

    LogUtils.e("onCreateView");
    return view;
}
 

private void init() {
    mToolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(mToolbar);
    setTitle(R.string.app_name);
    mToolbar.setTitleTextColor(Color.WHITE);

    mFabButton = (ImageButton) findViewById(R.id.fab);
    mFabButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), "FAB", Toast.LENGTH_SHORT).show();
        }
    });

    RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList());
    recyclerView.setAdapter(recyclerAdapter);
    recyclerView.setOnScrollListener(new HidingScrollListener() {
        @Override
        public void onHide() {
            hideViews();
        }

        @Override
        public void onShow() {
            showViews();
        }
    });

}
 

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_seven);
    mRecyclerView = (RecyclerView) findViewById(R.id.recyclerView);
    mRecyclerView2 = (RecyclerView) findViewById(R.id.recyclerView2);
    mRecyclerView3 = (RecyclerView) findViewById(R.id.recyclerView3);
    mRecyclerView4 = (RecyclerView) findViewById(R.id.recyclerView4);
    initRecyclerView();
    initRecyclerView2();
    initRecyclerView3();
    initRecyclerView4();
}
 

@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
    if (mBookshelfs.isEmpty()) {
        return;
    }
    int position = viewHolder.getAdapterPosition();
    final Bookshelf bookshelf = mBookshelfs.get(position);
    bookshelf.setIndex(position);
    queue.add(bookshelf);
    mBookshelfs.remove(position);
    mbookshelfAdapter.notifyItemRemoved(position);
}
 

@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
    final int dragFlags;
    final int swipeFlags;
    if (recyclerView.getLayoutManager() instanceof GridLayoutManager
            || recyclerView.getLayoutManager() instanceof StaggeredGridLayoutManager) {
        dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
        swipeFlags = 0;
    } else {
        dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
        swipeFlags = mSwipeFlags;
    }
    return makeMovementFlags(dragFlags, swipeFlags);
}
 

private void setWrappedAdapter(RecyclerView.Adapter adapter)
{

    if (mWrappedAdapter != null) mWrappedAdapter.unregisterAdapterDataObserver(mDataObserver);
    mWrappedAdapter = adapter;
    Class adapterClass = mWrappedAdapter.getClass();
    if (!mItemTypesOffset.containsKey(adapterClass)) putAdapterTypeOffset(adapterClass);
    mWrappedAdapter.registerAdapterDataObserver(mDataObserver);
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    //int section = getArguments().getInt(ARG_SECTION_NUMBER);
    View rootView = inflater.inflate(R.layout.fragment_rv, container, false);
    mRecyclerView = (RecyclerView) rootView.findViewById(R.id.rv_list);

    // use this setting to improve performance if you know that changes
    // in content do not change the layout size of the RecyclerView
    mRecyclerView.setHasFixedSize(true);

    mAdapter = new SimpleAdapter();
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mAdapter.add("jordyamc");
    mRecyclerView.setAdapter(mAdapter);

    return rootView;
}
 

@Override
public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
    super.clearView(recyclerView, viewHolder);

    viewHolder.itemView.setAlpha(ALPHA_FULL);

    if (viewHolder instanceof ItemTouchHelperViewHolder) {
        // Tell the view holder it's time to restore the idle state
        ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder;
        itemViewHolder.onItemClear();
    }
}
 

private void initView() {
    swipeRefreshLayout.setOnRefreshListener(this);
    setSwipeRefreshLayoutColor(swipeRefreshLayout);
    mLinearLayoutManager = new LinearLayoutManager(getActivity());
    swipeTarget.setLayoutManager(mLinearLayoutManager);
    swipeTarget.setHasFixedSize(true);
    swipeTarget.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            if (dy > 0) //向下滚动
            {
                visibleItemCount = mLinearLayoutManager.getChildCount();
                totalItemCount = mLinearLayoutManager.getItemCount();
                pastVisiblesItems = mLinearLayoutManager.findFirstVisibleItemPosition();

                if (!loading && (visibleItemCount + pastVisiblesItems) >= totalItemCount) {
                    loading = true;
                    onLoadMore();
                }
            }
        }
    });
    videoAdapter = new VideoAdapter(getActivity(), mWeiboVideoBlogs);
    swipeTarget.setAdapter(videoAdapter);
    mIVideoPresenter.getVideoFromCache(1);
    if (SharePreferenceUtil.isRefreshOnlyWifi(getActivity())) {
        if (NetWorkUtil.isWifiConnected(getActivity())) {
            onRefresh();
        } else {
            Toast.makeText(getActivity(), getString(R.string.toast_wifi_refresh_data), Toast.LENGTH_SHORT).show();
        }
    } else {
        onRefresh();
    }
}
 

public final void performScrollToStableId(long stableId) {
    if (stableId != RecyclerView.NO_ID) {
        int position = -1;
        for (int i = 0; i < mAdapter.getItemCount(); i++) {
            if (mAdapter.getItemId(i) == stableId) {
                position = i;
                break;
            }
        }
        if (position >= 0) {
            scrollToPosition(position);
            onScrolledToStableId(stableId, position);
        }
    }
}
 

@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
    try {
        super.onLayoutChildren(recycler, state);
    } catch (IndexOutOfBoundsException e) {
        Log.e("Error", "IndexOutOfBoundsException in RecyclerView happens");
    }
}
 

@Override
public void check(View view, NoMatchingViewException noViewFoundException) {
    if (noViewFoundException != null) {
        throw noViewFoundException;
    }

    RecyclerView recyclerView = (RecyclerView) view;
    RecyclerView.Adapter adapter = recyclerView.getAdapter();
    assertThat(adapter.getItemCount(), is(expectedCount));
}
 

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.tests, container, false);
    progressBar = (ProgressBar) view.findViewById(R.id.progress);

    recyclerView = (RecyclerView) view.findViewById(R.id.recyclerview);

    LinearLayoutManager llm = new LinearLayoutManager(getActivity());
    recyclerView.setLayoutManager(llm);

    return view;
}
 

@Override
public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
    View childView = view.findChildViewUnder(e.getX(), e.getY());
    if (childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) {
        mListener.onItemClick(childView, view.getChildPosition(childView));
    }
    return false;
}