java - 在不使用任何第三方的情况下将 map 数据映射到同一卡片 View 中的 Recyclerview Adapter

标签 java android android-recyclerview hashmap adapter

我需要将数据膨胀到父子关系中，就像在可扩展 ListView 中一样，但在同一个卡片 View 中，这设计起来相当复杂。所以我尝试将数据安排到 Hashmap<String,List<object>> 中。成键值对。但现在无法理解如何将数据映射到 recyclerview 适配器。 我不想使用 SectionedRecyclerViewAdapter或任何第三方库。

输出如图所示，但根据 map 数据，每个类别下应有 3 个和 4 个 child 。

我也试过这个solution但它没有用。

我的 map 数据:

Dry Clean
---------
Punjabi Set
Blazer
Safari suit 

Wash & Iron
-----------
Suit (3 pcs set)
Denim-Short
Dhoti
Waist Coat

适配器类:

public class OrderDetailsAdapter extends RecyclerView.Adapter<OrderDetailsAdapter.MyViewHolder> {
    private HashMap<String, List<OrderDetailsModel.CartDatum>> moviesList;
    Context mContext;
    MyViewHolder holder1;
    ProgressDialog progressDialog;
    ConnectionDetector cd;
    private SparseBooleanArray expandState = new SparseBooleanArray();
    HashMap<String, List<OrderDetailsModel.CartDatum>> hashMap;

    public OrderDetailsAdapter(HashMap<String, List<OrderDetailsModel.CartDatum>> moviesList, Context mContext) {
        this.moviesList = moviesList;
        this.mContext = mContext;
        progressDialog = new ProgressDialog(mContext);
        progressDialog.setMessage("Loading...");
        progressDialog.setCancelable(false);
        progressDialog.setCanceledOnTouchOutside(false);
        cd = new ConnectionDetector(mContext);
        this.hashMap = moviesList;
        for (int i = 0; i < moviesList.size(); i++) {
            expandState.append(i, false);
        }
    }

    private ObjectAnimator createRotateAnimator(final View target, final float from, final float to) {
        ObjectAnimator animator = ObjectAnimator.ofFloat(target, "rotation", from, to);
        animator.setDuration(300);
        animator.setInterpolator(new LinearInterpolator());
        return animator;
    }


    private void onClickButton(final LinearLayout expandableLayout, final RelativeLayout buttonLayout, final int i) {
        //Simply set View to Gone if not expanded
        //Not necessary but I put simple rotation on button layout
        if (expandableLayout.getVisibility() == View.VISIBLE) {
            createRotateAnimator(buttonLayout, 180f, 0f).start();
            expandableLayout.setVisibility(View.GONE);
            expandState.put(i, false);
        } else {
            createRotateAnimator(buttonLayout, 0f, 180f).start();
            expandableLayout.setVisibility(View.VISIBLE);
            expandState.put(i, true);
        }
    }


    public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView tv_productname, tv_packetsize, tv_position;
        AppCompatImageView iv_product;
        RelativeLayout buttonLayout;
        LinearLayout expandableLayout;
        TextView tvCatName;

        public MyViewHolder(View view) {
            super(view);
            tvCatName = view.findViewById(R.id.tvCatName);
            tv_productname = view.findViewById(R.id.tv_productname);
            iv_product = view.findViewById(R.id.iv_product);
            tv_packetsize = view.findViewById(R.id.tv_packetsize);
            buttonLayout = view.findViewById(R.id.button);
            expandableLayout = view.findViewById(R.id.expandableLayout);
        }

    }


    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_orderdetails, parent, false);
        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(final MyViewHolder holder, final int position) {
        holder1 = holder;
        final boolean isExpanded = expandState.get(position);
        holder.expandableLayout.setVisibility(isExpanded ? View.VISIBLE : View.GONE);

        holder.buttonLayout.setRotation(expandState.get(position) ? 180f : 0f);
        holder.buttonLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(final View v) {
                onClickButton(holder.expandableLayout, holder.buttonLayout, position);
            }
        });

        for (Map.Entry<String, List<OrderDetailsModel.CartDatum>> entry : hashMap.entrySet()) {
            //System.out.println(entry.getKey()+" : "+entry.getValue());
            Log.e("VAluess", entry.getKey() + " : " + entry.getValue().size());
            holder.tvCatName.setText(entry.getKey());
            for (int j = 0; j < entry.getValue().size(); j++) {
                holder.tv_productname.setText(entry.getValue().get(j).getDressName());
                try {
                    Picasso.with(mContext)
                            .load(entry.getValue().get(j).getDressPhoto())
                            .into(holder.iv_product, new com.squareup.picasso.Callback() {
                                @Override
                                public void onSuccess() {
                                    // holder.progressbar.setVisibility(View.GONE);
                                }

                                @Override
                                public void onError() {
                                    holder.iv_product.setImageResource(R.mipmap.ic_launcher);
                                }
                            });
                } catch (Exception e) {
                }
            }
        }

    }


    @Override
    public int getItemCount() {
        return moviesList.size();
    }
}

Output is coming like as shown in pic but according to map data 2 categories and 3 and 4 child should come under each category

最佳答案

我的要求和你的很相似。我也用过 Hashmap<String,<Objects>>但是我的解决方案对我自己来说有点问题，因为我在适配器类中动态地膨胀 subview ，这当然不应该是这种方式，但它会满足您的目的。任何建议或帮助将不胜感激，以使代码更好......

//主要 Activity 类

public class MainActivity extends AppCompatActivity {

    List<Data> listData1 = new ArrayList<>();
    List<Data> listData2 = new ArrayList<>();
    List<Data> listData3 = new ArrayList<>();
    DataAdapter adapter;
    MapAdapter mapAdapter;
    Context mcontext;
    AlphabetIndexFastScrollRecyclerView alphabetIndexFastScrollRecyclerView;
    HashMap<String, List<Data>> listHash = new HashMap<>();

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



        listData1.add(new Data("Avik", 20.1));
        listData1.add(new Data("Arnab", 21.1));
        listData1.add(new Data("Anikit", 2));
        listData2.add(new Data("Rajjoy", 3));
        listData2.add(new Data("Sandipan", 4));
        listData2.add(new Data("Arindam", 54));
        listData2.add(new Data("Abhishek", 23));

        listData3.add(new Data("Raju",23));
        listData3.add(new Data("Nagarjuna",21));

        listHash.put("Dry Wash", listData1);
        listHash.put("Iron", listData2);




        alphabetIndexFastScrollRecyclerView = findViewById(R.id.recyclerView);
        alphabetIndexFastScrollRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));

        mapAdapter = new MapAdapter(mcontext, listHash);
        alphabetIndexFastScrollRecyclerView.setAdapter(mapAdapter);

    }
}

//适配器类

public class MapAdapter extends RecyclerView.Adapter<MapAdapter.MyHolder> {
    HashMap<String, List<Data>> dataList;
    Context context;
    private SparseBooleanArray expandState = new SparseBooleanArray();

    public MapAdapter(Context context, HashMap<String, List<Data>> dataList) {
        this.dataList = dataList;
        this.context = context;
        for (int i = 0; i < dataList.size(); i++) {
            expandState.append(i, false);
        }

    }

    @Override
    public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_map, null);
        return new MyHolder(view);
    }

    @Override
    public void onBindViewHolder(final MyHolder holder, final int position) {
        holder.setIsRecyclable(false);
        holder.textView_name.setText(getHashMapKeyFromIndex(dataList, position));
        final boolean isExpanded = expandState.get(position);
        holder.expandableLayout.setVisibility(isExpanded ? View.VISIBLE : View.GONE);

        Log.e("val", "" + dataList.get(getHashMapKeyFromIndex(dataList, position)).size());
        //llContainer
        holder.llContainer.removeAllViews();
        double sum = 0;
        LayoutInflater layoutInflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        for (int i = 0; i < dataList.get(getHashMapKeyFromIndex(dataList, position)).size(); i++) {
            Log.e("VALL", dataList.get(getHashMapKeyFromIndex(dataList, position)).get(i).title);
            View view = layoutInflator.inflate(R.layout.row_subcat_child, null);
            TextView tv_title = view.findViewById(R.id.tv_title);
            TextView tv_price = view.findViewById(R.id.tv_price);
            tv_title.setText(dataList.get(getHashMapKeyFromIndex(dataList, position)).get(i).title);
            tv_price.setText(String.valueOf(dataList.get(getHashMapKeyFromIndex(dataList, position)).get(i).price));
            sum = sum + dataList.get(getHashMapKeyFromIndex(dataList, position)).get(i).price;
            holder.llContainer.addView(view);
        }
        holder.textView_total.setText(""+sum);
        Log.d("sum",""+sum);

        holder.buttonLayout.setRotation(expandState.get(position) ? 180f : 0f);
        holder.buttonLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(final View v) {
                onClickButton(holder.expandableLayout, holder.buttonLayout, position);
            }
        });
    }

    @Override
    public int getItemCount() {
        return dataList.size();
    }

    public class MyHolder extends RecyclerView.ViewHolder {
        TextView textView_name,textView_total;
        LinearLayout expandableLayout, llContainer;
        RelativeLayout buttonLayout;

        public MyHolder(View view) {
            super(view);
            textView_total = view.findViewById(R.id.textView_total);
            textView_name = view.findViewById(R.id.textView_name);
            expandableLayout = view.findViewById(R.id.expandableLayout);
            buttonLayout = view.findViewById(R.id.button);
            llContainer = view.findViewById(R.id.llContainer);
        }
    }

    public static String getHashMapKeyFromIndex(HashMap hashMap, int index) {

        String key = null;
        HashMap<String, Object> hs = hashMap;
        int pos = 0;
        for (Map.Entry<String, Object> entry : hs.entrySet()) {
            if (index == pos) {
                key = entry.getKey();
            }
            pos++;
        }
        return key;
    }

    private ObjectAnimator createRotateAnimator(final View target, final float from, final float to) {
        ObjectAnimator animator = ObjectAnimator.ofFloat(target, "rotation", from, to);
        animator.setDuration(300);
        animator.setInterpolator(new LinearInterpolator());
        return animator;
    }

    private void onClickButton(final LinearLayout expandableLayout, final RelativeLayout buttonLayout, final int i) {

        //Simply set View to Gone if not expanded
        //Not necessary but I put simple rotation on button layout
        if (expandableLayout.getVisibility() == View.VISIBLE) {
            createRotateAnimator(buttonLayout, 180f, 0f).start();
            expandableLayout.setVisibility(View.GONE);
            expandState.put(i, false);
        } else {
            createRotateAnimator(buttonLayout, 0f, 180f).start();
            expandableLayout.setVisibility(View.VISIBLE);
            expandState.put(i, true);
        }
    }

}

//数据类

public class Data {
    String title;
    String classs;
    String section;
    double price;

    public Data(String title, double price) {
        this.title = title;
        this.price = price;
    }

    public Data(String title) {
        this.title = title;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getClasss() {
        return classs;
    }

    public void setClasss(String classs) {
        this.classs = classs;
    }

    public String getSection() {
        return section;
    }

    public void setSection(String section) {
        this.section = section;
    }
}

//row_subcat_child

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:weightSum="4">

        <TextView
            android:id="@+id/tv_title"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"></TextView>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"></TextView>

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"></TextView>

        <TextView
            android:id="@+id/tv_price"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"></TextView>
    </LinearLayout>
</RelativeLayout>

//list_item_map

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/cv"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"
    android:layout_marginTop="5dp"
    android:layout_marginRight="5dp"
    card_view:cardCornerRadius="5dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:orientation="vertical">

        <RelativeLayout
            android:id="@+id/buttonLayout"
            android:layout_width="match_parent"
            android:layout_height="48dp">

            <RelativeLayout
                android:id="@+id/pparent"
                android:layout_width="wrap_content"
                android:layout_toLeftOf="@+id/button"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/textView_name"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="10dp"
                    android:layout_marginBottom="10dp"
                    android:layout_toLeftOf="@+id/textView_total"
                    android:textSize="18sp"
                    android:textStyle="bold" />

                <TextView
                    android:id="@+id/textView_total"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="10dp"
                    android:layout_alignParentRight="true"
                    android:layout_marginBottom="10dp"
                    android:textSize="18sp"
                    android:textStyle="bold" />

            </RelativeLayout>

            <!--My dropdown Button -->
            <RelativeLayout
                android:id="@+id/button"
                android:layout_width="48dp"
                android:layout_height="48dp"
                android:layout_alignParentRight="true"
                android:layout_gravity="end"
                android:gravity="center">

                <ImageView
                    android:layout_width="25dp"
                    android:layout_height="25dp"
                    android:layout_alignParentEnd="false"
                    android:layout_alignParentRight="false"
                    android:background="@drawable/ic_arrow_drop_down_black_24dp" />
            </RelativeLayout>
        </RelativeLayout>
        <!--The layout below is my ExpandableLayout -->
        <LinearLayout
            android:id="@+id/expandableLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">


            <LinearLayout
                android:id="@+id/llContainer"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:orientation="vertical">


            </LinearLayout>

        </LinearLayout>

    </LinearLayout>

</android.support.v7.widget.CardView>

enter image description here

关于java - 在不使用任何第三方的情况下将 map 数据映射到同一卡片 View 中的 Recyclerview Adapter，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59439915/

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