Java RecyclerView类代码示例

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
private void init() {
    ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
        actionBar.setDisplayHomeAsUpEnabled(true);
    }

    RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

    int[] gridNumAndWidth = calculateGridNumAndWidth();
    recyclerView.setLayoutManager(new GridLayoutManager(this, gridNumAndWidth[0]));

    adapter = new IconAdapter(this, gridNumAndWidth[1]);
    adapter.setMode(IconAdapter.MODE_ICON_LABEL);
    adapter.setOnItemClickListener(new IconAdapter.OnItemClickListener() {
        @Override
        public void onClick(int pos, IconBean bean) {
            searchView.clearFocus();
            IconDialog.newInstance(bean, false).show(getSupportFragmentManager(), "iconDialog");
        }
    });
    recyclerView.setAdapter(adapter);
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_assignments, container, false);
    vSwipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipeContainer);
    vSwipeRefreshLayout.setOnRefreshListener(this);
    vSwipeRefreshLayout.setColorSchemeColors(getResources().getColor(R.color.primary));

    vRecyclerView = (RecyclerView) view.findViewById(R.id.cardList);
    vRecyclerView.setHasFixedSize(false);
    final LinearLayoutManager llm = new LinearLayoutManager(getActivity());
    llm.setOrientation(LinearLayoutManager.VERTICAL);
    vRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            // So the user didn't accidentally refresh on pulling up
            vSwipeRefreshLayout.setEnabled(llm.findFirstCompletelyVisibleItemPosition() == 0);
        }
    });
    vRecyclerView.setLayoutManager(llm);
    return view;
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public boolean animateChange(@NonNull RecyclerView.ViewHolder oldHolder,
                             @NonNull RecyclerView.ViewHolder newHolder,
                             @NonNull ItemHolderInfo preInfo,
                             @NonNull ItemHolderInfo postInfo) {

    if (preInfo instanceof RecipesItemHolderInfo) {
        RecipesItemHolderInfo recipesItemHolderInfo = (RecipesItemHolderInfo) preInfo;
        RecipesAdapter.RecipeViewHolder holder = (RecipesAdapter.RecipeViewHolder) newHolder;

        animateHeartButton(holder);
        if (RecipesAdapter.ACTION_LIKE_IMAGE_DOUBLE_CLICKED.equals(recipesItemHolderInfo.updateAction)) {
            animatePhotoLike(holder);
        }

    }

    return false;
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.place_list, container, false);

    // Create a list of words
    final ArrayList<Place> places = new ArrayList<Place>();
    places.add(new Place(R.string.name_Paris, R.string.Paris_title,
            R.drawable.paris_france_logo));
    places.add(new Place(R.string.paris_plage, R.string.argu_p_p,
            R.drawable.paris_plage));
    places.add(new Place(R.string.shopping, R.string.argu_shopping,
            R.drawable.shopping_paris));

    PlaceRecyclerViewAdapter adapter = new PlaceRecyclerViewAdapter(places);

    RecyclerView recyclerView = (RecyclerView) rootView.findViewById(R.id.list);
    recyclerView.setAdapter(adapter);
    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

    return rootView;
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
  int listViewState;
  switch (newState) {
    case RecyclerView.SCROLL_STATE_DRAGGING:
      listViewState = ListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL;
      break;
    case RecyclerView.SCROLL_STATE_IDLE:
      listViewState = ListView.OnScrollListener.SCROLL_STATE_IDLE;
      break;
    case RecyclerView.SCROLL_STATE_SETTLING:
      listViewState = ListView.OnScrollListener.SCROLL_STATE_FLING;
      break;
    default:
      listViewState = UNKNOWN_SCROLL_STATE;
  }

  scrollListener.onScrollStateChanged(null /*view*/, listViewState);
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
/**
 * 当RecyclerView在windows活动时获取StaggeredGridLayoutManager布局管理器，修正header和footer显示整行
 *
 * @param holder the RecyclerView.ViewHolder
 */
@Override
public void onViewAttachedToWindow(RecyclerView.ViewHolder holder) {
    ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();
    if (lp != null && lp instanceof StaggeredGridLayoutManager.LayoutParams) {
        StaggeredGridLayoutManager.LayoutParams p = (StaggeredGridLayoutManager.LayoutParams) lp;
        if (BEHAVIOR_MODE == ONLY_HEADER) {
            p.setFullSpan(holder.getLayoutPosition() == 0);
        } else if (BEHAVIOR_MODE == ONLY_FOOTER) {
            p.setFullSpan(holder.getLayoutPosition() == mItems.size() + 1);
        } else if (BEHAVIOR_MODE == BOTH_HEADER_FOOTER) {
            if (holder.getLayoutPosition() == 0 || holder.getLayoutPosition() == mItems.size() + 1) {
                p.setFullSpan(true);
            }
        }
    }
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public void onDraw(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
    int dividerLeft = parent.getPaddingLeft();
    int dividerRight = parent.getWidth() - parent.getPaddingRight();

    int childCount = parent.getChildCount();
    for (int i = 0; i < childCount - 1; i++) {
        View child = parent.getChildAt(i);

        RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();

        int dividerTop = child.getBottom() + params.bottomMargin;
        int dividerBottom = dividerTop + mDivider.getIntrinsicHeight();

        mDivider.setBounds(dividerLeft, dividerTop, dividerRight, dividerBottom);
        mDivider.draw(canvas);
    }
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_history);
    // Calling the RecyclerView
    mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
    mRecyclerView.setHasFixedSize(true);

    Realm.init(this);
    realm = Realm.getDefaultInstance();
    RealmResults<StepCounts> results = realm.where(StepCounts.class).findAll();
    // The number of Columns
    mLayoutManager = new GridLayoutManager(this, 1);
    mRecyclerView.setLayoutManager(mLayoutManager);

    mAdapter = new HistoryAdapter(results,HistoryActivity.this);
    mRecyclerView.setAdapter(mAdapter);
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    BaseActivity activity = (BaseActivity) getActivity();

    /* MastodonApi on the base activity is only guaranteed to be initialised after the parent
     * activity is created, so everything needing to access the api object has to be delayed
     * until here. */
    api = activity.mastodonApi;
    // Just use the basic scroll listener to load more accounts.
    scrollListener = new EndlessOnScrollListener(layoutManager) {
        @Override
        public void onLoadMore(int page, int totalItemsCount, RecyclerView view) {
            AccountListFragment.this.onLoadMore(view);
        }
    };

    recyclerView.addOnScrollListener(scrollListener);
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
    super.onAttachedToRecyclerView(recyclerView);
    RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager) {
        final GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                if (mSpanSizeLookup == null) {
                    return (isHeader(position) || isFooter(position) || isRefreshHeader(position))
                            ? gridLayoutManager.getSpanCount() : 1;
                } else {
                    return (isHeader(position) || isFooter(position) ||
                            isRefreshHeader(position)) ? gridLayoutManager.getSpanCount() :
                            mSpanSizeLookup.getSpanSize(gridLayoutManager,
                                    (position - (getHeaderViewCount() + 1)));
                }
            }
        });
    }
    mInnerAdapter.onAttachedToRecyclerView(recyclerView);
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
public void setAdapter(final RecyclerView.Adapter adapter) {
                if (adapter != null) {
                        adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
                                @Override
                                public void onChanged() {
                                        LogUtil.e("数据改变了 ");
//                                        当数据插入完成后
                                        isLoading = false;
                                        if (moreLoadView.getVisibility() == VISIBLE) {
                                                moreLoadView.setVisibility(GONE);
                                        }
                                        if (adapter.getItemCount() == 0 && emptyView != null) {
                                                LogUtil.e("数据为空时，显示空view");
                                                emptyView.setVisibility(VISIBLE);
                                        } else if (emptyView != null) {
                                                emptyView.setVisibility(GONE);
                                        }
                                }
                        });
                        display.setAdapter(adapter);
                }
        }
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
                               int heightSpec, int[] measuredDimension) {
    if (position < getItemCount()) {
        try {
            View view = recycler.getViewForPosition(position);//fix 动态添加时报IndexOutOfBoundsException
            if (view != null) {
                RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
                int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,
                        getPaddingLeft() + getPaddingRight(), p.width);
                int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,
                        getPaddingTop() + getPaddingBottom(), p.height);
                view.measure(childWidthSpec, childHeightSpec);
                measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;
                measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;
                recycler.recycleView(view);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
/**
 * Procedure meant to handle the drawing of the intended {@link SimpleDividerItemDecoration}'s divider
 * on start / left of the parent's {@link RecyclerView} item.
 * @param canvas the {@link Canvas} object where the divider will be drawn.
 * @param parent the parent {@link RecyclerView} for the applied {@link SimpleDividerItemDecoration}.
 * @param mDivider the divider's target {@link Drawable} value.
 */
protected void drawDrawableDividerPositionStart(@NonNull final Canvas canvas, @NonNull final RecyclerView parent,
                                                @NonNull final Drawable mDivider) {
    final int top = parent.getPaddingTop();
    final int bottom = parent.getHeight() - parent.getPaddingBottom();

    final int childCount = parent.getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View view = parent.getChildAt(i);
        final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) view.getLayoutParams();
        final int left = view.getLeft() + params.leftMargin;
        final int right = left + mDivider.getIntrinsicWidth();
        mDivider.setBounds(left, top, right, bottom);
        mDivider.draw(canvas);
    }
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
public void drawVertical(Canvas c, RecyclerView parent) {
    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 top = child.getTop() - params.topMargin;
        final int bottom = child.getBottom() + params.bottomMargin;
        final int left = child.getRight() + params.rightMargin;
        final int right = left + mHeightDivider.getIntrinsicWidth();

        mHeightDivider.setBounds(left, top, right, bottom);
        mHeightDivider.draw(c);
    }
}
 

import android.support.v7.widget.RecyclerView; //导入依赖的package包/类
@Override
public void onCheckViewClicked(CheckView checkView, MediaInfo mediaInfo, RecyclerView.ViewHolder holder) {
    if (mSelectionSpec.countable) {
        int checkedNum = mSelectedCollection.checkedNumOf(mediaInfo);
        if (checkedNum == CheckView.UNCHECKED) {
            if (assertAddSelection(holder.itemView.getContext(), mediaInfo)) {
                mSelectedCollection.add(mediaInfo);
                notifyCheckStateChanged();
            }
        } else {
            mSelectedCollection.remove(mediaInfo);
            notifyCheckStateChanged();
        }
    } else {
        if (mSelectedCollection.isSelected(mediaInfo)) {
            mSelectedCollection.remove(mediaInfo);
            notifyCheckStateChanged();
        } else {
            if (assertAddSelection(holder.itemView.getContext(), mediaInfo)) {
                mSelectedCollection.add(mediaInfo);
                notifyCheckStateChanged();
            }
        }
    }
}