Question

我正在学习android，我正在尝试创建一个应用程序，它将以recyclelerView的形式显示* .txt文件中的所有单词。我发现的大部分教程都是对要显示的元素（图像，字符串等）进行硬编码。但是，我的.txt文件有很多单词，我不能在代码中键入所有这些（这需要几天）。请帮忙。

对于我的应用我有2个片段。第一个片段用于列出所有单词，第二个片段用于在选择单词时显示带有单词的句子。

首先我创建了一个包含数据的类（如果我没错！）

public class showData {
String title;
String content;

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

public void setContent(String content) {
    this.content = content;
}}

然后我创建了一个viewAdaptar类

public class viewAdapter extends RecyclerView.Adapter<viewAdapter.myViewHolder>{
private LayoutInflater inflater;
List<showData> data = Collections.emptyList();

//inflate layout for recycle view
public viewAdapter(Context context){
    inflater = LayoutInflater.from(context);
    this.data = data;
}
@Override
public myViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = inflater.inflate(R.layout.custom_view, parent,false);
    myViewHolder holder = new myViewHolder(view);

    return holder;
}


@Override
public void onBindViewHolder(myViewHolder holder, int position) {
    showData current = data.get(position);
    holder.holdtitle.setText(current.title);
    holder.holdcontent.setText(current.content);
}

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

class myViewHolder extends RecyclerView.ViewHolder {
    TextView holdtitle;
    TextView holdcontent;

    public myViewHolder(View itemView) {
        super(itemView);
        holdtitle = (TextView) itemView.findViewById(R.id.title);

        holdcontent = (TextView)itemView.findViewById(R.id.content);

    }
}}

我想在片段1上显示列表我的fragment1类最初在ListView的帮助下显示了单词 InputStream类。

public class Fragment1 extends Fragment {

private RecyclerView recyclerView;
private viewAdapter adapterView;

ListListener sentenceActivity;
public interface ListListener{
    public void displayWord(String text,InputStream res);
}
@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    try{
        sentenceActivity = (ListListener) activity;
    }catch(ClassCastException e){
        throw new ClassCastException(activity.toString());
    }
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    //create view of the first fragment
    View view = inflater.inflate(R.layout.fragment_fragment1, container, false);

    recyclerView = (RecyclerView)view.findViewById(R.id.recyclerView);


    //open the file
    final InputStream inputStream = getResources().openRawResource(R.raw.android_dev_agreement);
    //get each word of the file with the help of the getWord method
    //Set<String> words = getWords(inputStream);
    //variable to link to the listview in the fragment1
    //final ListView myList = (ListView) view.findViewById(R.id.list);
    //create an array list for storing all the words processed from the file
    //ArrayList<String> items = new ArrayList<>();
    //add all the words into the ArrayList
    //items.addAll(words);
    //Convert the ArrayList into viewable items that can be added to the listview
    //ArrayAdapter<String> adapter = new ArrayAdapter<String>(view.getContext(),android.R.layout.simple_list_item_1, items);
    //populate the listview
    //myList.setAdapter(adapter);
    //set click listener for item in the Adapter array
    /*myList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            try {
                inputStream.reset();
            } catch (IOException e) {
                e.printStackTrace();
            }
            String text = myList.getItemAtPosition(position).toString();
            sentenceActivity.displayWord(text, inputStream);
        }
    });*/
    return view;
}


private Set<String> getWords(InputStream res){
    BufferedReader br=new BufferedReader(new InputStreamReader(res));
    String line;
    Set<String> words = new HashSet<String>(2000);
    try{
        while ((line = br.readLine()) != null) {
            String[] wordsOnLine = line.split("[\\p{Punct}\\s}]");
            for (String w : wordsOnLine) {
                if (w.trim().length() < 2)
                    continue;
                words.add(w.toLowerCase());
            }
        }
    }catch (IOException iox){
        words = null;
    }
    return words;
}}

Listview的片段就是这个，它成功生成了列表视图。但现在我想将它改为RecyclerView。

请建议如何做到这一点。

Android应用程序从.txt文件生成recyclerView内的String列表

0 个答案: