recyclerview多布局编写类似相册UI

前几天朋友问我这样的布局怎么做，如下图：

因为照片的数目不确定，用ListView+GridView？ExpandableListView+GridView？但是嵌套都不靠谱。
另一位朋友提醒我，魅族手机相册也是这样的布局。如图：

那我们去看看魅族相册UI 是怎么做的呢？
利用android布局层次结构查看利器 hierarchyviewer.bat查看
打开androidstudio--->Tools--->Android--->Android Device Monitor

2020/10/17新增
因为androidstudio去掉了Android Device Monitor，所以现在用androidstudio--->Tools--->Layout Inspector
有时候Layout Inspector不太稳定，可以使用sdk\tools\bin\uiautomatorviewer.bat 直接双击就可以开始使用了。

就可以看到这样的画面：

这样就很清楚了，日期和4个ImageView当成一个item,下面的item日期相同就把日期隐藏掉，图片没有数据就占位隐藏。
这样想就简单了，就不用嵌套了。
但是我们这里用recyclerView多布局（不同的item作为不同的布局）的方式实现。把日期和4个ImageView当成两个不同的item。
下面直接上代码
日期的布局

图片的布局

图片布局style item_recycler_img

activity代码

package com.uyac.recyclerviewmanylayout;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class MainActivity extends AppCompatActivity {

    private Context context;
    private Random mRandom;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        context = this;
        mRandom = new Random();
        testRecyclerView();
    }


    private RecyclerView recyclerView;
    private RecycleAdapter mAdapter;
    private List mList;

    private void testRecyclerView() {

        mList = new ArrayList<>();
        //添加数据
        for (int i = 0; i < 45; i++) {

            ImgShowModel model = new ImgShowModel();
            model.setDate("2016年3月"+(i+1)+"日");
            model.setViewType(Constants.ITEM_RECYCLER_DATE);
            mList.add(model);

            int itemNum = randomNum(1,4);
            for (int j = 0; j < itemNum; j++) {

                ImgShowModel imgModel = new ImgShowModel();
                imgModel.setViewType(Constants.ITEM_RECYCLER_IMG);
                int imgData[] = null;
                if( j == itemNum - 1)
                {
                    //最后一个不满7条数据的情况
                    imgData  = new int[randomNum(1,7)];
                }else
                {
                    imgData  = new int[7];
                }
                for (int k = 0; k < imgData.length; k++) {

//                    imgData[k] = imgArray[mRandom.nextInt(imgArray.length)];
                    imgData[k] = R.mipmap.ic_launcher;
                }

                imgModel.setImg(imgData);
                mList.add(imgModel);

            }
        }

        mAdapter = new RecycleAdapter(this, mList);
        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
//        recyclerView.setLayoutManager(new GridLayoutManager(this, 7, GridLayoutManager.VERTICAL, false));
        recyclerView.setLayoutManager(new LinearLayoutManager(context,LinearLayoutManager.VERTICAL,false));
//        recyclerView.setLayoutManager(new StaggeredGridLayoutManager(7,StaggeredGridLayoutManager.VERTICAL));
        recyclerView.setAdapter(mAdapter);

    }


    private int imgArray[] = {R.mipmap.b,R.mipmap.ic_launcher,R.mipmap.ic_yaxun_jingpin_collect,R.mipmap.star,R.mipmap.test_ic_launch};

    /**
     * @param min
     * @param max
     * @return  随机几到几
     */
    private int randomNum(int min,int max)
    {

        int r = Math.abs(max - min ) + 1;

        return  mRandom.nextInt(r)+min;
    }

}

Adapter代码

package com.uyac.recyclerviewmanylayout;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;



import java.util.List;

/**
 * Created by ShaoQuanwei on 2016/10/28.
 */

public class RecycleAdapter extends RecyclerView.Adapter{

    private Context context;
    private List list;
    private final String TAG = "RecycleAdapter";
    private int itemHeigth;

    public RecycleAdapter(Context context, List list) {
        this.context = context;
        this.list = list;
        //让高度和宽度相同
        itemHeigth = ScreenUtils.getScreenWH(context)[0]/Constants.RECYCLE_COLUMN;

    }


    @Override
    public int getItemViewType(int position) {

        Log.e(TAG, "getItemViewType: "+ list.get(position).getViewType());

        return list.get(position).getViewType();
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        RecyclerView.ViewHolder holder = null;

        switch (viewType)
        {
            case Constants.ITEM_RECYCLER_DATE:

                View viewData = LayoutInflater.from(context).inflate(R.layout.item_recycler_date,parent,false);
                holder = new DateViewHolder(viewData);

                break;
            case Constants.ITEM_RECYCLER_IMG:

                View viewImg = LayoutInflater.from(context).inflate(R.layout.item_recycler_img,parent,false);
                holder = new ImgViewHolder(viewImg);

                break;
        }

        return holder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {


        ImgShowModel model = list.get(position);
        Log.e(TAG, "onBindViewHolder: "+position+"   "+model.getViewType());

        if(model.getViewType() == Constants.ITEM_RECYCLER_DATE)
        {
            Log.e(TAG, "onBindViewHolder: DateViewHolder" );

            DateViewHolder dateViewHolder = ((DateViewHolder)holder);
            dateViewHolder.tv.setText(list.get(position).getDate());

        }else if(model.getViewType() == Constants.ITEM_RECYCLER_IMG)
        {
            Log.e(TAG, "onBindViewHolder: ImgViewHolder" );

            ImgViewHolder imgViewHolder = ((ImgViewHolder)holder);

            for (int i = 0; i < Constants.RECYCLE_COLUMN; i++) {

                if(i < model.getImg().length)
                {
                    imgViewHolder.img[i].setImageResource(model.getImg()[i]);
                    imgViewHolder.img[i].setVisibility(View.VISIBLE);
                }else
                {

                    imgViewHolder.img[i].setVisibility(View.INVISIBLE);
                }

                ViewGroup.LayoutParams params = imgViewHolder.img[i].getLayoutParams();
                params.height = itemHeigth;
                imgViewHolder.img[i].setLayoutParams(params);
            }
        }
    }

    @Override
    public int getItemCount() {
        return list != null ? list.size():0;
    }


    public class DateViewHolder extends RecyclerView.ViewHolder
    {
        private TextView tv;

        public DateViewHolder(View itemView) {
            super(itemView);

            tv = (TextView) itemView.findViewById(R.id.item_recycler_date);

        }
    }

    public class ImgViewHolder extends RecyclerView.ViewHolder
    {
        private ImageView img[] = new ImageView[7];
        private int imgID[] = {R.id.item_recycler_img1,R.id.item_recycler_img2,R.id.item_recycler_img3,R.id.item_recycler_img4,R.id.item_recycler_img5,R.id.item_recycler_img6,R.id.item_recycler_img7};

        public ImgViewHolder(View itemView) {
            super(itemView);

            for (int i = 0; i < imgID.length; i++) {

                img[i] = (ImageView) itemView.findViewById(imgID[i]);
            }
        }
    }
}

model的代码

package com.uyac.recyclerviewmanylayout;

/**
 * Created by Administrator on 2017/2/5.
 */

public class ImgShowModel {

    private int viewType;
    //采用数组来存放图片数据 
    private int img[] ;
    private String date;


    public int getViewType() {
        return viewType;
    }

    public void setViewType(int viewType) {
        this.viewType = viewType;
    }

    public int[] getImg() {
        return img;
    }

    public void setImg(int[] img) {
        this.img = img;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }
}

效果图

另附demo地址：https://github.com/zhuzhushang/RecyclerViewManyLayout/tree/master