Java GridLayoutManager.SpanSizeLookup方法代码示例

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
public static void onAttachedToRecyclerView(RecyclerView recyclerView, final RecyclerView.Adapter adapter, final int pinnedHeaderType) {
    // 如果是网格布局，这里处理标签的布局占满一行
    final RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager) {
        final GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        final GridLayoutManager.SpanSizeLookup oldSizeLookup = gridLayoutManager.getSpanSizeLookup();
        gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                if (adapter.getItemViewType(position) == pinnedHeaderType) {
                    return gridLayoutManager.getSpanCount();
                }
                if (oldSizeLookup != null) {
                    return oldSizeLookup.getSpanSize(position);
                }
                return 1;
            }
        });
    }
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
public static void onAttachedToRecyclerView(RecyclerView.Adapter innerAdapter, RecyclerView recyclerView, final SpanSizeCallback callback)
{
    innerAdapter.onAttachedToRecyclerView(recyclerView);

    RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager)
    {
        final GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        final GridLayoutManager.SpanSizeLookup spanSizeLookup = gridLayoutManager.getSpanSizeLookup();

        gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup()
        {
            @Override
            public int getSpanSize(int position)
            {
                return callback.getSpanSize(gridLayoutManager, spanSizeLookup, position);
            }
        });
        gridLayoutManager.setSpanCount(gridLayoutManager.getSpanCount());
    }
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
public static void onAttachedToRecyclerView(RecyclerView.Adapter innerAdapter, RecyclerView
        recyclerView, final SpanSizeCallback callback) {
    innerAdapter.onAttachedToRecyclerView(recyclerView);

    RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager) {
        final GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        final GridLayoutManager.SpanSizeLookup spanSizeLookup = gridLayoutManager
                .getSpanSizeLookup();

        gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                return callback.getSpanSize(gridLayoutManager, spanSizeLookup, position);
            }
        });
        gridLayoutManager.setSpanCount(gridLayoutManager.getSpanCount());
    }
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
/**
 * is position align top of recycler view
 * 从当前位置找起，只要找到一个跟自己的spanIndex一样的就说明不是第一行，或者已经查找过的spancount >= spanCount说明不是第一行
 *
 * @param parent
 * @param position
 * @param totalSpanCount
 * @return
 */
private boolean isTop(RecyclerView parent, int position, int totalSpanCount) {
    if (parent.getLayoutManager() instanceof GridLayoutManager) {
        GridLayoutManager.SpanSizeLookup sizeLookup = ((GridLayoutManager) parent.getLayoutManager()).getSpanSizeLookup();
        if (sizeLookup != null) {
            int currentSpanIndex = sizeLookup.getSpanIndex(position, totalSpanCount);
            int lookupedSpanCount = 0;
            for (int i = position - 1; i >= 0; i--) {
                lookupedSpanCount = lookupedSpanCount + sizeLookup.getSpanSize(i);
                if (lookupedSpanCount >= totalSpanCount) {
                    return false;
                }
                if (sizeLookup.getSpanIndex(i, totalSpanCount) == currentSpanIndex) {
                    return false;
                }
            }
            return true;
        }
    } else if (parent.getLayoutManager() instanceof StaggeredGridLayoutManager) {
        return position < totalSpanCount;//staggered 的每一列一个span
    }
    return false;
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
    mInnerAdapter.onAttachedToRecyclerView(recyclerView);

    RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager) {
        final GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        final GridLayoutManager.SpanSizeLookup spanSizeLookup = gridLayoutManager.getSpanSizeLookup();

        gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                int viewType = getItemViewType(position);
                if (mHeaderViews.get(viewType) != null) {
                    return gridLayoutManager.getSpanCount();
                } else if (mFooterViews.get(viewType) != null) {
                    return gridLayoutManager.getSpanCount();
                }
                if (spanSizeLookup != null)
                    return spanSizeLookup.getSpanSize(position);
                return 1;
            }
        });
        gridLayoutManager.setSpanCount(gridLayoutManager.getSpanCount());
    }
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
/**
 * In the case mShowLastDivider = false,
 * Returns offset for how many views we don't have to draw a divider for,
 * for LinearLayoutManager it is as simple as not drawing the last child divider,
 * but for a GridLayoutManager it needs to take the span count for the last items into account
 * until we use the span count configured for the grid.
 *
 * @param parent RecyclerView
 * @return offset for how many views we don't have to draw a divider or 1 if its a
 * LinearLayoutManager
 */
private int getLastDividerOffset(RecyclerView parent) {
    if (parent.getLayoutManager() instanceof GridLayoutManager) {
        GridLayoutManager layoutManager = (GridLayoutManager) parent.getLayoutManager();
        GridLayoutManager.SpanSizeLookup spanSizeLookup = layoutManager.getSpanSizeLookup();
        int spanCount = layoutManager.getSpanCount();
        int itemCount = parent.getAdapter().getItemCount();
        for (int i = itemCount - 1; i >= 0; i--) {
            if (spanSizeLookup.getSpanIndex(i, spanCount) == 0) {
                return itemCount - i;
            }
        }
    }

    return 1;
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
/**
 * Gets the total number of spans by the position
 *
 * @param manager  The GridLayoutManager
 * @param position The position of Item
 * @return
 */
private int getTotalSpanSizeByPosition(GridLayoutManager manager, int position) {
    int spanTotalSize = 0;
    GridLayoutManager.SpanSizeLookup lookup = manager.getSpanSizeLookup();
    int spanCount = manager.getSpanCount();
    for (int i = 0; i <= position; i++) {
        int spanLookup = lookup.getSpanSize(i);
        spanTotalSize = spanTotalSize + spanLookup;
        if (spanTotalSize >= spanCount) {
            if (spanTotalSize % spanCount != 0) {
                spanTotalSize = spanLookup;
            } else {
                if (spanTotalSize > spanCount) {
                    if (spanTotalSize % spanCount != 0)
                        spanTotalSize = spanTotalSize % spanCount;
                    else
                        spanTotalSize = spanCount;
                }
            }
        }
    }
    return spanTotalSize;
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
private void recoverLayoutManager(LayoutManager layoutManager) {
    if (layoutManager instanceof GridLayoutManager) {
        GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        GridLayoutManager.SpanSizeLookup spanSizeLookup = gridLayoutManager.getSpanSizeLookup();
        if (spanSizeLookup instanceof FixedViewSpanSizeLookup) {
            gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.DefaultSpanSizeLookup());
            ((FixedViewSpanSizeLookup) spanSizeLookup).detach();
        }
    }
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
private void setlayoutManager(RecyclerView recyclerView) {
        final GridLayoutManager layoutManager = new GridLayoutManager(this, SPAN_COUNT);
        GridLayoutManager.SpanSizeLookup spanSizeLookup = new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                Object item = items.get(position);
                if (item instanceof Bean01) {
                    return 1;
                }
                if (item instanceof Bean02) {
                    return 2;
                }
                if (item instanceof Bean03) {
                    return SPAN_COUNT;
                }
                if (item instanceof Bean04) {
                    return SPAN_COUNT;
                }
                if (item instanceof String) {
                    return SPAN_COUNT;
                }
                return SPAN_COUNT;
            }
        };
        layoutManager.setSpanSizeLookup(spanSizeLookup);
        recyclerView.setLayoutManager(layoutManager);
//        recyclerView.setLayoutManager(new LinearLayoutManager(this));
    }
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
private void setLayoutManager(RecyclerView recyclerView) {
        final StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(SPAN_COUNT, StaggeredGridLayoutManager.VERTICAL);
        GridLayoutManager.SpanSizeLookup spanSizeLookup = new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                Object item = items.get(position);
                if (item instanceof Bean01) {
                    return 1;
                }
                if (item instanceof Bean02) {
                    return 1;
                }
                if (item instanceof Bean03) {
                    return SPAN_COUNT;
                }
                if (item instanceof Bean04) {
                    return SPAN_COUNT;
                }
                if (item instanceof String) {
                    return SPAN_COUNT;
                }
                return 1;
            }
        };
//        layoutManager.setSpanSizeLookup(spanSizeLookup);
//        layoutManager.setSpanCount(2);
        recyclerView.setLayoutManager(layoutManager);
    }
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
/**
 * This method unsubscribe observer and change listeners reference to null
 * for avoid memory leaks.
 */
public void unbind() {
    if (recyclerView.getLayoutManager() instanceof LinearLayoutManager) {
        wrapperAdapter.unbind();
        userAdapter.unregisterAdapterDataObserver(wrapperAdapterObserver);
        recyclerView.setAdapter(userAdapter);

    } else if (recyclerView.getLayoutManager() instanceof GridLayoutManager && wrapperSpanSizeLookup != null) {
        GridLayoutManager.SpanSizeLookup spanSizeLookup = wrapperSpanSizeLookup.getWrappedSpanSizeLookup();
        ((GridLayoutManager) recyclerView.getLayoutManager()).setSpanSizeLookup(spanSizeLookup);
    }
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
public GridLayoutManager.SpanSizeLookup getSpanSizeLookup() {
    return spanSizeLookup;
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_multidata);

    adapter = new MultiTypeAdapter();
    RecyclerView recyclerView = (RecyclerView) findViewById(R.id.rlv_multidata);
    adapter.register(Bean04.class, new ItemVIew06());
    adapter.register(String.class, new ItemVIewNormal());

    final GridLayoutManager layoutManager = new GridLayoutManager(this, SPAN_COUNT);
    GridLayoutManager.SpanSizeLookup spanSizeLookup = new GridLayoutManager.SpanSizeLookup() {
        @Override
        public int getSpanSize(int position) {
            Object item = items.get(position);
            if (item instanceof Bean04) {
                return SPAN_COUNT;
            }
            if (item instanceof String) {
                return SPAN_COUNT;
            }
            return 1;
        }
    };
    layoutManager.setSpanSizeLookup(spanSizeLookup);
    recyclerView.setLayoutManager(layoutManager);
    int space = getResources().getDimensionPixelSize(R.dimen.normal_space);
    recyclerView.addItemDecoration(new ItemDecoration(space));
    recyclerView.setAdapter(adapter);

    items = new ArrayList<>();
    for(int j=0;j<10;j++) {
        items.add(" 单数据 -> 多类型  ");
        for (int i = 0; i < 6; i++) {
            Bean04 bean04 = new Bean04("bean04_" + i);
            if (i % 1 == 0) {
                bean04.setType(Bean04.TYPE_ONE);
            }
            if (i % 2 == 0) {
                bean04.setType(Bean04.TYPE_TWO);
            }
            if (i % 3 == 0) {
                bean04.setType(Bean04.TYPE_THREE);
            }
            items.add(bean04);
        }
    }

    adapter.setItems(items);
    adapter.notifyDataSetChanged();
}
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_multidata);

        adapter = new MultiTypeAdapter();
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.rlv_multidata);

        adapter.register(String.class, new ItemVIewNormal());
        adapter.register(Bean01.class, new ItemVIew01());
        adapter.register(Bean02.class, new ItemVIew02());
        adapter.register(Bean03.class, new ItemVIew03());
        adapter.register(Bean04.class, new ItemVIew06());

        final GridLayoutManager layoutManager = new GridLayoutManager(this, SPAN_COUNT);
        GridLayoutManager.SpanSizeLookup spanSizeLookup = new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                Object item = items.get(position);
                if (item instanceof Bean01) {
                    return 1;
                }
                if (item instanceof Bean02) {
                    return 2;
                }
                if (item instanceof Bean03) {
                    return SPAN_COUNT;
                }
                if (item instanceof Bean04 ) {
                    return SPAN_COUNT;
                }
                if (item instanceof String) {
                    return SPAN_COUNT;
                }
                return 2;
            }
        };

        layoutManager.setSpanSizeLookup(spanSizeLookup);
        recyclerView.setLayoutManager(layoutManager);
        int space = getResources().getDimensionPixelSize(R.dimen.normal_space);
        recyclerView.addItemDecoration(new ItemDecoration(space));
        recyclerView.setAdapter(adapter);

        items = new ArrayList<>();
        for(int j=0;j<10;j++) {
            items.add("混合式 \n 多数据 -> 多类型  单数据 -> 多类型");
            for (int i = 0; i < 3; i++) {
                Bean04 bean04 = new Bean04("bean04_" + i);
                if (i % 1 == 0) {
                    bean04.setType(Bean04.TYPE_ONE);
                }
                if (i % 2 == 0) {
                    bean04.setType(Bean04.TYPE_TWO);
                }
                if (i % 3 == 0) {
                    bean04.setType(Bean04.TYPE_THREE);
                }
                items.add(bean04);
            }
            for (int i = 0; i < 8; i++) {
                items.add(new Bean01("bean01_" + i));
            }
            for (int i = 0; i < 3; i++) {
                items.add(new Bean02("bean02_" + i));
            }
            for (int i = 0; i < 1; i++) {
                items.add(new Bean03("bean03_" + i));
            }
        }

//        layoutManager.setSpanSizeLookup(spanSizeLookup);

        adapter.setItems(items);
        adapter.notifyDataSetChanged();
    }
 

import android.support.v7.widget.GridLayoutManager; //导入方法依赖的package包/类
@Override
public void onAttachedToRecyclerView(final RecyclerView recyclerView)
{
    mInnerAdapter.onAttachedToRecyclerView(recyclerView);

    final RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
    if (layoutManager instanceof GridLayoutManager)
    {
        final GridLayoutManager gridLayoutManager = (GridLayoutManager) layoutManager;
        final GridLayoutManager.SpanSizeLookup spanSizeLookup = gridLayoutManager.getSpanSizeLookup();

        gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup()
        {
            @Override
            public int getSpanSize(int position)
            {
                if (isShowLoadView(position))
                {
                    return gridLayoutManager.getSpanCount();
                }
                if (spanSizeLookup != null)
                {
                    return spanSizeLookup.getSpanSize(position);
                }
                return 1;
            }
        });
        gridLayoutManager.setSpanCount(gridLayoutManager.getSpanCount());
    }

    recyclerView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()){
                case MotionEvent.ACTION_DOWN:
                    lastY = event.getRawY();
                    break;
                case MotionEvent.ACTION_MOVE:
                    isPullUp = event.getRawY() < lastY ;
                    break;
            }
            lastY  = event.getRawY();
            return false;
        }
    });

    recyclerView.addOnScrollListener(new OnRcvScrollListener(){
        @Override
        protected void onLoadMore() {
            super.onLoadMore();
            if(isEnableLoad() && isPullUp && !mRefreshing){
                isLoadingMore = true;
                mOnLoadMoreListener.onLoad();
            }
        }

        @Override
        protected void showLoadView() {
            super.showLoadView();
            if(isEnableLoad() && isPullUp && !mRefreshing) {
                mLoadView.setLoadViewType(BaseLoadView.TYPE_LOAD_MORE);
            }
        }
    });

}