java - Android - 在单个 RecyclerView 中存储两个数组

Question

我有两个数组:

private void InitData(){
    list = new ArrayList<String>();
                    list.add("element 1");
                    list.add("element 2");
                    list.add("element 3");
                    list.add("element 4");
                    list.add("element 5");
}
private void InitData2(){
    list2 = new ArrayList<String>();
                    list.add("item 1");
                    list.add("item 2");
                    list.add("item 3");
                    list.add("item 4");
                    list.add("item 5");
}

我想要实现的是将两个列表存储在单个 RecyclerView 中，其中包含元素的列表显示在屏幕左侧，项目列表显示在右侧(如下图所示) )我现在使用两个 ListView 并愿意转换为单个 recyclerView附言。最好保持数组的结构

编辑/这是我要使用的教程 RecyclerView Tutorial

Answer 1

您可以使用 Pojo 类来实现此目的

public class DataHolder {

String item1,item2;

  public DataHolder(){

  }

  String getItem1(){
    retrun item1;
   }

   String getItem2(){
    retrun item2;
   }

  String setItem1(String item1){
    this.item1 = item1;
   }

 String setItem2(String item2){
    this.item2 = item2;
   }
}

然后创建DataHolder列表。

ArrayList<DataHolder> bothItemDataList =new ArrayList<DataHolder>();

添加这样的项目。

DataHolder item = new DataHolder ();

item.setItem1("element 1");
item.setItem2("element 1");

bothItemDataList.add(item);

更新部分:

主要 Activity :

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;
    public EditText search;
    //    private List<String> list = new ArrayList<String>();
    private List<DataHolder> list = new ArrayList<DataHolder>();
    SimpleAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        search = (EditText) findViewById(R.id.search);
        mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        mRecyclerView.setHasFixedSize(true);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));

        countryList();  // in this method, Create a list of items.

        // call the adapter with argument list of items and context.
        mAdapter = new SimpleAdapter(list, this);
        mRecyclerView.setAdapter(mAdapter);

        addTextListener();

    }

    // this method is used to create list of items.
    public void countryList() {

        DataHolder item = new DataHolder();
        item.setName("Afghanistan");
        item.setTranslation("demo trans1");

        list.add(item);

        DataHolder item1 = new DataHolder();
        item1.setName("Paksitan");
        item1.setTranslation("my pakistan");

        list.add(item1);
//        list.add("Afghanistan");
//        list.add("Albania");
//        list.add("Algeria");
//        list.add("Bangladesh");
//        list.add("Belarus");
//        list.add("Canada");
//        list.add("Cape Verde");
//        list.add("Central African Republic");
//        list.add("Denmark");
//        list.add("Dominican Republic");
//        list.add("Egypt");
//        list.add("France");
//        list.add("Germany");
//        list.add("Hong Kong");
//        list.add("India");
//        list.add("Iceland");

    }


    public void addTextListener() {

        search.addTextChangedListener(new TextWatcher() {

            public void afterTextChanged(Editable s) {
            }

            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            public void onTextChanged(CharSequence query, int start, int before, int count) {

                query = query.toString().toLowerCase();

                final List<DataHolder> filteredList = new ArrayList<DataHolder>();

                for (int i = 0; i < list.size(); i++) {

                    final String text = list.get(i).getName().toLowerCase();
                    if (text.contains(query)) {

                        filteredList.add(list.get(i));
                    }
                }

                mRecyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
                mAdapter = new SimpleAdapter(filteredList, MainActivity.this);
                mRecyclerView.setAdapter(mAdapter);
                mAdapter.notifyDataSetChanged();  // data set changed
            }
        });
    }
}

SimpleAdapter:

public class SimpleAdapter extends
        RecyclerView.Adapter<SimpleAdapter.MyViewHolder> {

    private List<DataHolder> list_item;
    public Context mcontext;


    public SimpleAdapter(List<DataHolder> list, Context context) {

        list_item = list;
        mcontext = context;
    }

    // Called when RecyclerView needs a new RecyclerView.ViewHolder of the given type to represent an item.
    @Override
    public SimpleAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent,
                                                         int viewType) {
        // create a layout
        View view = LayoutInflater.from(parent.getContext()).inflate(
                R.layout.list_item, null);

        MyViewHolder myViewHolder = new MyViewHolder(view);
        return myViewHolder;
    }

    // Called by RecyclerView to display the data at the specified position.
    @Override
    public void onBindViewHolder(final MyViewHolder viewHolder, final int position) {


        viewHolder.country_name.setText(list_item.get(position).getName());
        viewHolder.country_translation.setText(list_item.get(position).getTranslation());

        viewHolder.country_name.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Toast.makeText(mcontext, list_item.get(position).getName(),
                        Toast.LENGTH_LONG).show();
            }
        });

    }

    // initializes some private fields to be used by RecyclerView.
    public static class MyViewHolder extends RecyclerView.ViewHolder {

        public TextView country_name, country_translation;

        public MyViewHolder(View itemLayoutView) {
            super(itemLayoutView);

            country_name = (TextView) itemLayoutView.findViewById(R.id.country_name);
            country_translation = (TextView) itemLayoutView.findViewById(R.id.country_translation);

        }
    }

    //Returns the total number of items in the data set hold by the adapter.
    @Override
    public int getItemCount() {
        return list_item.size();
    }

}

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.numetriclabz.androidsearch.MainActivity">

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/country_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:text="Sohail"
            android:textColor="#0b0080"
            android:textSize="16dp" />

        <TextView
            android:id="@+id/country_translation"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="15dp"
            android:layout_toEndOf="@+id/country_name"
            android:layout_toRightOf="@+id/country_name"
            android:text="New Text"
            android:textColor="#0b0080" />

    </RelativeLayout>

</RelativeLayout>

数据持有者:

public class DataHolder {
    String name, translation;


    public DataHolder() {
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getTranslation() {
        return translation;
    }

    public void setTranslation(String translation) {
        this.translation = translation;
    }
}

更新:

 public void countryList() {

        for (int i = 0; i < list.size(); i++) {

            DataHolder item = new DataHolder();
            item.setName(i + "name");
            item.setTranslation(i + "translation");

            list.add(item);
        }
    }