RecyclerViewの通用适配(Adapter)

BaseQuickAdapter 导入(依赖)
蓝奏云
下载源码 密码:p5j0,添加 library 库到你项目当中
BaseQuickAdapter 使用

mRecyclerView.setAdapter(mAdapter = new BaseQuickAdapter(R.layout.rv_item, getItemDatas()) {
    @Override
    protected void convert(final BaseViewHolder helper, String item) {
        helper.setText(R.id.tv_item_text, item);
       
    }
});

Item点击,长按事件

//Item 点击事件
setOnItemClickListener(int viewId, AdapterView.OnItemClickListener listener)
//长按事件
setOnItemLongClickListener(int viewId, AdapterView.OnItemLongClickListener listener)

子控件的点击事件

helper.setOnClickListener(R.id.tv_item_text, new View.OnClickListener() {
       @Override
       public void onClick(View v) {
          //事件处理
       }
   });

添加头部,尾部

    //头部
    mAdapter.addHeaderView();
    //尾部
    mAdapter.addFooterView();

以下是添加头部的代码:

View headerView=getLayoutInflater().inflate(R.layout.rv_header, null);
headerView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT));
mAdapter.addHeaderView(headerView);

尾部的添加与头部的添加类似。
添加 Item动画

  //一行代码开启动画 默认CUSTOM动画
  mAdapter.openLoadAnimation(BaseQuickAdapter.CUSTOMIN);

更换其他动画:

//ALPHAIN, SCALEIN, SLIDEIN_BOTTOM, SLIDEIN_LEFT, SLIDEIN_RIGHT, //SLIDEIN_LEFT_RIGHT, SLIDEIN_BOTTOM_TOP, CUSTOMIN
mAdapter.openLoadAnimation(BaseQuickAdapter.CUSTOMIN);

自定义 Item动画:

mAdapter.openLoadAnimation(new BaseAnimation[]{
        new BaseAnimation() {
            @Override
            public Animator[] getAnimators(View view) {
                return new Animator[]{ObjectAnimator.ofFloat(view, "alpha", 0.5f, 1.0f),
                        ObjectAnimator.ofFloat(view, "scaleX", 0.5f, 1.0f)};
            }
        }
});

设置加载更多
只需要设置加载更多接口,就可以实现加载更多功能。

mAdapter.setOnLoadMoreListener(new BaseQuickAdapter.RequestLoadMoreListener() {
        @Override
        public void onLoadMoreRequested() {
        }
    });

以下代码正在加载中,加载失败点击重试,加载完成等状态:

mShowType++;
    if (mShowType == 2) {
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                //加载失败,点击重试
                mAdapter.loadMoreFail();
            }
        }, DELAY_MILLIS);
    } else if (mShowType >= 4) {
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                //加载完成
                mAdapter.loadMoreEnd();
            }
        });
    } else {
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                mAdapter.addData(addDatas());
                //加载更多完成
                mAdapter.loadMoreComplete();
            }
        }, DELAY_MILLIS);
    }

可以设置加载更多类型,只需要添加一行代码,实现不同的加载更多动画:

  //设置加载更多 loadingview 
 setLoadMoreType(@LoadMoreType int loadMoreType)

这里有四种模式供你选择,APAY, BALL_BEAT, BALL_CLIP_ROTATE, BALL_SCALE,如果都不满足你的需求,你可以继承 BaseIndicator类从新加载视图。
添加空布局

    View emptyView=getLayoutInflater().inflate(R.layout.rv_empty, null);
    emptyView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT));
    //添加空视图
    mAdapter.setEmptyView(emptyView);
    
    emptyView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "your click empty", Snackbar.LENGTH_SHORT).show();
        }
    });

拖拽和侧滑

添加以下代码:

ItemTouchHelper.Callback callback = new SimpleItemTouchHelperCallback(mAdapter);
ItemTouchHelper mItemTouchHelper = new ItemTouchHelper(callback);
mAdapter.setItemTouchHelper(mItemTouchHelper);
mAdapter.setDragViewId(R.id.iv_drag);
mItemTouchHelper.attachToRecyclerView(mRecyclerView);

支持不同类型

mRecyclerView.setAdapter(mAdapter = new BaseMultiItemAdapter(this, getMultiItemDatas()) {
    @Override
    protected void convert(BaseViewHolder helper, MultiItem item) {
        switch (helper.getItemViewType()) {
            case MultiItem.SEND:
                helper.setText(R.id.chat_from_content, item.content);
                //helper.setImageBitmap(R.id.chat_from_icon,getRoundCornerBitmap(BitmapFactory.decodeResource(getResources(), R.mipmap.chat_head), 16));
                break;
            case MultiItem.FROM:
                helper.setText(R.id.chat_send_content, item.content);
                //helper.setImageBitmap(R.id.chat_send_icon,getRoundCornerBitmap(BitmapFactory.decodeResource(getResources(), R.mipmap.from_head), 16));
                break;
        }
    }
    @Override
    protected void addItemLayout() {
        addItemType(MultiItem.SEND, R.layout.chat_send_msg);
        addItemType(MultiItem.FROM, R.layout.chat_from_msg);
    }
});
mAdapter.openLoadAnimation(true);
btnSend.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        MultiItem multiItem = new MultiItem();
        multiItem.itemType = MultiItem.SEND;
        multiItem.content = etChat.getText().toString();
        mAdapter.add(multiItem);
        mRecyclerView.smoothScrollToPosition(mAdapter.getItemCount());
        //mRecyclerView.scrollToPosition(mAdapter.getItemCount() - 1);
    }
});

数据源:

public static List getMultiItemDatas() {
    List list = new ArrayList<>();
    for (int i = 0; i < 100; i++) {
        MultiItem multiItem = new MultiItem();
        if (i % 2 == 0) {
            multiItem.itemType = MultiItem.SEND;
            multiItem.content = "海,妹子约吗";
        } else {
            multiItem.itemType = MultiItem.FROM;
            multiItem.content = "大哥,你别怕";
        }
        list.add(multiItem);
    }
    return list;
}

流式布局
一行代码实现流式布局效果:

mRecyclerView.setLayoutManager(new FlowLayoutManager());

探探翻牌

类似流式效果,重写 LayoutManager 实现翻牌效果:

 mRecyclerView.setLayoutManager(new OverLayCardLayoutManager());
//添加 itemTouchHelper
final TanTanCallback callback = new TanTanCallback(mRecyclerView, mAdapter, mAdapter.getData());
    //测试竖直滑动是否已经不会被移除屏幕
    //callback.setHorizontalDeviation(Integer.MAX_VALUE);
    final ItemTouchHelper itemTouchHelper = new ItemTouchHelper(callback);
    itemTouchHelper.attachToRecyclerView(mRecyclerView);

淘宝商品列表切换

//线性
        if (mIsLinearManager) {
            mAdapter.setLayoutType(BaseQuickAdapter.TRANS_0_VIEW);
            mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        } else {
            //网格
            mAdapter.setLayoutType(BaseQuickAdapter.TRANS_1_VIEW);
            mRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));
            //需要显示加载更多则加上下面这句   从新关联recycler
            mAdapter.onAttachedToRecyclerView(mRecyclerView);
        }
        mIsLinearManager = !mIsLinearManager;

注意:最多支持3种不同类型的转换。

单选

实现单选,有好几位同仁都在问我,其实实现单选是比较简单的,方案也比较多,我这里就不在细讲了。下面我给出一种实现方案:

public void setItemChecked(int position) {
        if (mLastCheckedPosition == position)
            return;
        
        mBooleanArray.put(position, true);
        
        if (mLastCheckedPosition > -1) {
            mBooleanArray.put(mLastCheckedPosition, false);
            mAdapter.notifyItemChanged(mLastCheckedPosition);
        }

        mAdapter.notifyDataSetChanged();

        mLastCheckedPosition = position;
    }

mBooleanArray 存储是否被点击,把点击前的索引值置为 false , 点击索引置为 true 。

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