Java ItemShadowDecorator类代码示例

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        //noinspection ConstantConditions
        mRecyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
        mLayoutManager = new LinearLayoutManager(getActivity());

        // drag & drop manager
        mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
        mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
                (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3));

        //adapter
        final MyDraggableItemAdapter myItemAdapter = new MyDraggableItemAdapter(getDataProvider());
        mAdapter = myItemAdapter;

        mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(myItemAdapter);      // wrap for dragging

        final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();

        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
        mRecyclerView.setItemAnimator(animator);

        // additional decorations
        //noinspection StatementWithEmptyBody
        if (supportsViewElevation()) {
            // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
        } else {
            mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
        }
        mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

        mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);

        // for debugging
//        animator.setDebug(true);
//        animator.setMoveDuration(2000);
    }
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        //noinspection ConstantConditions
        mRecyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
        mLayoutManager = new LinearLayoutManager(getActivity());

        // drag & drop manager
        mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
        mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
                (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3));

        //adapter
        final MyDraggableWithSectionItemAdapter myItemAdapter = new MyDraggableWithSectionItemAdapter(getDataProvider());
        mAdapter = myItemAdapter;

        mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(myItemAdapter);      // wrap for dragging

        final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();

        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
        mRecyclerView.setItemAnimator(animator);

        // additional decorations
        //noinspection StatementWithEmptyBody
        if (supportsViewElevation()) {
            // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
        } else {
            mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
        }
        mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

        mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);

        // for debugging
//        animator.setDebug(true);
//        animator.setMoveDuration(2000);
    }
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    //noinspection ConstantConditions
    mRecyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
    mLayoutManager = new LinearLayoutManager(getActivity());

    final Parcelable eimSavedState = (savedInstanceState != null) ? savedInstanceState.getParcelable(SAVED_STATE_EXPANDABLE_ITEM_MANAGER) : null;
    mRecyclerViewExpandableItemManager = new RecyclerViewExpandableItemManager(eimSavedState);

    //adapter
    final MyAddRemoveExpandableItemAdapter myItemAdapter = new MyAddRemoveExpandableItemAdapter(mRecyclerViewExpandableItemManager, getDataProvider());

    mAdapter = myItemAdapter;

    mWrappedAdapter = mRecyclerViewExpandableItemManager.createWrappedAdapter(myItemAdapter);       // wrap for expanding

    final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();

    // Change animations are enabled by default since support-v7-recyclerview v22.
    // Need to disable them when using animation indicator.
    animator.setSupportsChangeAnimations(false);

    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
    mRecyclerView.setItemAnimator(animator);
    mRecyclerView.setHasFixedSize(false);

    // additional decorations
    //noinspection StatementWithEmptyBody
    if (supportsViewElevation()) {
        // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
    } else {
        mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
    }
    mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

    mRecyclerViewExpandableItemManager.attachRecyclerView(mRecyclerView);
}
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
	AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

       LayoutInflater inflater = LayoutInflater.from(builder.getContext());

	View popupcontent = inflater.inflate(R.layout.popup_portrait_chooser,null,false);
       builder.setView(popupcontent);

	list = (AutofitRecyclerView) popupcontent.findViewById(R.id.popup_portrait_chooser_list);
	adapter = new PortraitAdapter(imageUris);
	adapter.setMinHeight(columnHeight);
       adapter.setMinWidth(columnWidth);
       adapter.setScaleType(scaleType);

       list.setColumnWidth(columnWidth);
	list.setAdapter(adapter);

       GridLayoutManager layoutManager = new GridLayoutManager(getActivity(),3);
       list.setLayoutManager(layoutManager);
       list.setItemAnimator(new SwipeDismissItemAnimator());

       // additional decorations
       //noinspection StatementWithEmptyBody
       if (supportsViewElevation()) {
           // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
       } else {
           list.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
       }

	adapter.setEventListener(this);

	builder.setTitle("Wähle ein Bild...");

	AlertDialog dialog = builder.create();
	dialog.setCanceledOnTouchOutside(true);
	return dialog;

}
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    //获取RecycleView,创建LayoutManager
    mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
    mLayoutManager = new LinearLayoutManager(this);

    // touch guard manager 阻止当Swipe时列表滚动
    mRecyclerViewTouchActionGuardManager = new RecyclerViewTouchActionGuardManager();
    mRecyclerViewTouchActionGuardManager.setInterceptVerticalScrollingWhileAnimationRunning(true);
    mRecyclerViewTouchActionGuardManager.setEnabled(true);

    // drag & drop manager
    mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
    mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
            (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3_xxhdpi));

    // swipe manager
    mRecyclerViewSwipeManager = new RecyclerViewSwipeManager();

    //adapter
    for(int i=0;i<100;i++){
        dataList.add(new MyItem(i,"测试数据"+i));
    }
    mAdapter  = new MyAdapter(dataList);

    mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(mAdapter);   //处理一下mAdapter可以拖拽
    mWrappedAdapter = mRecyclerViewSwipeManager.createWrappedAdapter(mWrappedAdapter);      //处理一下mAdapter可以滑动删除


    final GeneralItemAnimator animator = new SwipeDismissItemAnimator();

    // Change animations are enabled by default since support-v7-recyclerview v22.
    // Disable the change animation in order to make turning back animation of swiped item works properly.
    animator.setSupportsChangeAnimations(false);

    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mWrappedAdapter);  // 注意设置的是mWrappedAdapter
    mRecyclerView.setItemAnimator(animator);

    //additional decorations
    //noinspection StatementWithEmptyBody
    if (supportsViewElevation()) {
        // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
    } else {
        mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3_xxhdpi)));
    }
    mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

    // NOTE:
    // 初始化的顺序十分重要,这决定了处理Touch事件的优先级
    // 优先级: TouchActionGuard > Swipe > DragAndDrop
    mRecyclerViewTouchActionGuardManager.attachRecyclerView(mRecyclerView);
    mRecyclerViewSwipeManager.attachRecyclerView(mRecyclerView);
    mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);

}
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
private void initRecyclerView() {
    mRecyclerView = (RecyclerView) getView().findViewById(R.id.recylerView);
    mLayoutManager = new LinearLayoutManager(getActivity());

    // touch guard manager  (this class is required to suppress scrolling while swipe-dismiss animation is running)
    mRecyclerViewTouchActionGuardManager = new RecyclerViewTouchActionGuardManager();
    mRecyclerViewTouchActionGuardManager.setInterceptVerticalScrollingWhileAnimationRunning(true);
    mRecyclerViewTouchActionGuardManager.setEnabled(true);

    // drag & drop manager 拖拽排序的manager
    mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
    mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
            (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3_xxhdpi));

    // swipe manager 滑动item的manager
    mRecyclerViewSwipeManager = new RecyclerViewSwipeManager();

    //adapter
    mAdapter = new MyTaskAdapter(context, list);
    mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(mAdapter);      // wrap for swiping
    mWrappedAdapter = mRecyclerViewSwipeManager.createWrappedAdapter(mWrappedAdapter);      // wrap for swiping
    final GeneralItemAnimator animator = new SwipeDismissItemAnimator();

    // Change animations are enabled by default since support-v7-recyclerview v22.
    // Disable the change animation in order to make turning back animation of swiped item works properly.
    animator.setSupportsChangeAnimations(false);

    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
    mRecyclerView.setItemAnimator(animator);


    if (supportsViewElevation()) {
        // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
    } else {
        mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1_xxhdpi)));
    }
    mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

    // NOTE:
    // The initialization order is very important! This order determines the priority of touch event handling.
    // priority: TouchActionGuard > Swipe > DragAndDrop
    mRecyclerViewTouchActionGuardManager.attachRecyclerView(mRecyclerView);
    mRecyclerViewSwipeManager.attachRecyclerView(mRecyclerView);
    mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);
}
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
/**
     * 初始化
     */
    private void init() {
        listTask = new ArrayList<Task>();
        listDay = new ArrayList<Day>();
        adapterDay = new DayAdapter(context, listDay);

        mRecyclerView = (RecyclerView) findViewById(R.id.lv_all_zixi);
        lv_day = (ListView) findViewById(R.id.lv_day);
        tv_day = (TextView) findViewById(R.id.tv_day);


        // touch guard manager  (this class is required to suppress scrolling while swipe-dismiss animation is running)
        mRecyclerViewTouchActionGuardManager = new RecyclerViewTouchActionGuardManager();
        mRecyclerViewTouchActionGuardManager.setInterceptVerticalScrollingWhileAnimationRunning(true);
        mRecyclerViewTouchActionGuardManager.setEnabled(true);

        // drag & drop manager 拖拽排序的manager
        mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
        mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
                (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3_xxhdpi));

        // swipe manager 滑动item的manager
        mRecyclerViewSwipeManager = new RecyclerViewSwipeManager();

        //adapter
        mAdapter = new MyTaskAdapter(context, listTask);
        mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(mAdapter);      // wrap for swiping
        mWrappedAdapter = mRecyclerViewSwipeManager.createWrappedAdapter(mWrappedAdapter);      // wrap for swiping
        final GeneralItemAnimator animator = new SwipeDismissItemAnimator();

        // Change animations are enabled by default since support-v7-recyclerview v22.
        // Disable the change animation in order to make turning back animation of swiped item works properly.
        animator.setSupportsChangeAnimations(false);

        mRecyclerView.setLayoutManager(new LinearLayoutManager(context));
        mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
        mRecyclerView.setItemAnimator(animator);


        if (supportsViewElevation()) {
            // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
        } else {
            mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1_xxhdpi)));
        }
        mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

        // NOTE:
        // The initialization order is very important! This order determines the priority of touch event handling.
        // priority: TouchActionGuard > Swipe > DragAndDrop
        mRecyclerViewTouchActionGuardManager.attachRecyclerView(mRecyclerView);
        mRecyclerViewSwipeManager.attachRecyclerView(mRecyclerView);
        mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);


        lv_day.setAdapter(adapterDay);

        // // 允许加载更多
//        lv_day.setPullLoadEnable(true);
//        // 允许下拉
//        lv_day.setPullRefreshEnable(true);
//        // 设置监听器
//        lv_day.setXListViewListener(this);
//        lv_day.pullRefreshing();

        lv_day.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Day d = listDay.get(position);
                Calendar tmp = Calendar.getInstance();
                tmp.set(d.getYear(), d.getMonth(), d.getDay(), 0, 0, 1);
                tv_day.setText(TaskUtil.getZixiDateS(tmp.getTimeInMillis()));
                getZixiByDay(tmp);
            }
        });
        // 加载数据
        initData();
    }
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    //noinspection ConstantConditions
    mRecyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
    mLayoutManager = new LinearLayoutManager(getActivity());

    final Parcelable eimSavedState = (savedInstanceState != null) ? savedInstanceState.getParcelable(SAVED_STATE_EXPANDABLE_ITEM_MANAGER) : null;
    mRecyclerViewExpandableItemManager = new RecyclerViewExpandableItemManager(eimSavedState);

    // touch guard manager  (this class is required to suppress scrolling while swipe-dismiss animation is running)
    mRecyclerViewTouchActionGuardManager = new RecyclerViewTouchActionGuardManager();
    mRecyclerViewTouchActionGuardManager.setInterceptVerticalScrollingWhileAnimationRunning(true);
    mRecyclerViewTouchActionGuardManager.setEnabled(true);

    // drag & drop manager
    mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
    mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
            (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3));

    // swipe manager
    mRecyclerViewSwipeManager = new RecyclerViewSwipeManager();

    //adapter
    getDataProvider();
    final MyExpandableDraggableWithSectionItemAdapter myItemAdapter = new MyExpandableDraggableWithSectionItemAdapter(getDataProvider());

    mAdapter = myItemAdapter;

    mWrappedAdapter = mRecyclerViewExpandableItemManager.createWrappedAdapter(myItemAdapter);       // wrap for expanding
    mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(mWrappedAdapter);           // wrap for dragging
    mWrappedAdapter = mRecyclerViewSwipeManager.createWrappedAdapter(mWrappedAdapter);      // wrap for swiping

    final GeneralItemAnimator animator = new SwipeDismissItemAnimator();

    // Change animations are enabled by default since support-v7-recyclerview v22.
    // Need to disable them when using animation indicator.
    animator.setSupportsChangeAnimations(false);

    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
    mRecyclerView.setItemAnimator(animator);
    mRecyclerView.setHasFixedSize(false);

    // additional decorations
    //noinspection StatementWithEmptyBody
    if (supportsViewElevation()) {
        // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
    } else {
        mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
    }
    mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));


    // NOTE:
    // The initialization order is very important! This order determines the priority of touch event handling.
    //
    // priority: TouchActionGuard > Swipe > DragAndDrop > ExpandableItem
    mRecyclerViewTouchActionGuardManager.attachRecyclerView(mRecyclerView);
    mRecyclerViewSwipeManager.attachRecyclerView(mRecyclerView);
    mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);
    mRecyclerViewExpandableItemManager.attachRecyclerView(mRecyclerView);
}
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        //noinspection ConstantConditions
        mRecyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
        mLayoutManager = new LinearLayoutManager(getActivity());

        // drag & drop manager
        mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
        mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
                (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3));
        // Start dragging after long press
        mRecyclerViewDragDropManager.setInitiateOnLongPress(true);
        mRecyclerViewDragDropManager.setInitiateOnMove(false);

        //adapter
        final MyDraggableItemAdapter myItemAdapter = new MyDraggableItemAdapter(getDataProvider());
        mAdapter = myItemAdapter;

        mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(myItemAdapter);      // wrap for dragging

        final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();

        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
        mRecyclerView.setItemAnimator(animator);

        // additional decorations
        //noinspection StatementWithEmptyBody
        if (supportsViewElevation()) {
            // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
        } else {
            mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
        }
        mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

        mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);

        // for debugging
//        animator.setDebug(true);
//        animator.setMoveDuration(2000);
    }
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    //noinspection ConstantConditions
    mRecyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
    mLayoutManager = new LinearLayoutManager(getActivity());

    final Parcelable eimSavedState = (savedInstanceState != null) ? savedInstanceState.getParcelable(SAVED_STATE_EXPANDABLE_ITEM_MANAGER) : null;
    mRecyclerViewExpandableItemManager = new RecyclerViewExpandableItemManager(eimSavedState);

    //adapter
    getDataProvider();
    final MyExpandableItemAdapter myItemAdapter = new MyExpandableItemAdapter(getDataProvider());

    mAdapter = myItemAdapter;

    mWrappedAdapter = mRecyclerViewExpandableItemManager.createWrappedAdapter(myItemAdapter);       // wrap for expanding

    final GeneralItemAnimator animator = new RefactoredDefaultItemAnimator();

    // Change animations are enabled by default since support-v7-recyclerview v22.
    // Need to disable them when using animation indicator.
    animator.setSupportsChangeAnimations(false);

    mRecyclerView.setLayoutManager(mLayoutManager);
    mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
    mRecyclerView.setItemAnimator(animator);
    mRecyclerView.setHasFixedSize(false);

    // additional decorations
    //noinspection StatementWithEmptyBody
    if (supportsViewElevation()) {
        // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
    } else {
        mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
    }
    mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.list_divider), true));

    mRecyclerViewExpandableItemManager.attachRecyclerView(mRecyclerView);
}
 

import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator; //导入依赖的package包/类
protected void initRecyclerView(RecyclerView rv, RecyclerView.Adapter adapter, RecyclerView.LayoutManager layoutManager, boolean dragDrop, boolean swipe, boolean selection) {
    recyclerView = rv;
    mWrappedAdapter = adapter;

    mRecyclerViewTouchActionGuardManager = new RecyclerViewTouchActionGuardManager();
    mRecyclerViewTouchActionGuardManager.setInterceptVerticalScrollingWhileAnimationRunning(true);
    mRecyclerViewTouchActionGuardManager.setEnabled(true);

    // drag & drop manager
    if (dragDrop) {
        mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
        mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
                (NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z3));

        mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(mWrappedAdapter);     // wrap for dragging
    }
    if (swipe) {
        mRecyclerViewSwipeManager = new RecyclerViewSwipeManager();
        mWrappedAdapter = mRecyclerViewSwipeManager.createWrappedAdapter(mWrappedAdapter);      // wrap for swiping

        //recyclerView.setItemAnimator(new SwipeDismissItemAnimator());
    }

    if (selection) {
        mRecyclerViewSelectionManager = new RecyclerViewSelectionManager();
        mWrappedAdapter = mRecyclerViewSelectionManager.createWrappedAdapter(mWrappedAdapter);      // wrap for swiping
    }

    mLayoutManager = layoutManager;
    recyclerView.setLayoutManager(mLayoutManager);

    recyclerView.setAdapter(mWrappedAdapter);

    // additional decorations
    //noinspection StatementWithEmptyBody
    if (supportsViewElevation()) {
        // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
    } else {
        recyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) getResources().getDrawable(R.drawable.material_shadow_z1)));
    }
    //recyclerView.addItemDecoration(new SimpleListDividerDecorator(getResources().getDrawable(R.drawable.abc_list_divider_mtrl_alpha), true));

    // NOTE:
    // The initialization order is very important! This order determines the priority of touch event handling.
    //
    // priority: TouchActionGuard> Selection > Swipe > DragAndDrop
    if (mRecyclerViewTouchActionGuardManager != null)
        mRecyclerViewTouchActionGuardManager.attachRecyclerView(recyclerView);

    if (mRecyclerViewSelectionManager != null)
        mRecyclerViewSelectionManager.attachRecyclerView(recyclerView);

    if (mRecyclerViewSwipeManager != null)
        mRecyclerViewSwipeManager.attachRecyclerView(recyclerView);

    if (mRecyclerViewDragDropManager != null)
        mRecyclerViewDragDropManager.attachRecyclerView(recyclerView);
}