java - 在回收者 View 中设置 Intent ，OnCreate 以转到特定列表(行)的另一个特定 Activity

Question

我已经实现了 onClick，当我点击每个列表时，所有列表都将转到“abc” Activity ，但我想将包含单词“dd”的列表导航到 Activity “abcActivity”和包含单词的列表“ss”到“defActivity”。

我试图添加另一个 intent 但它再次对所有列表显示相同 :(

请帮助我，我在写这篇文章时阅读了所有建议的文章，但没有一篇是我所问的答案。请帮助我。

这是主要 Activity :

public class MainActivity extends AppCompatActivity implements WordAdapter.OnNoteListener {
    private RecyclerView recyclerView;
    private static final String TAG = MainActivity.class.getCanonicalName();

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

        recyclerView = findViewById(R.id.home_view);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);

        recyclerView.setLayoutManager(layoutManager);

        List<Word> wordList = new ArrayList<>();


        wordList.add(new Word(R.drawable.ic_launcher_background, "dd"));
        wordList.add(new Word(R.drawable.ic_launcher_background, "ss"));
        wordList.add(new Word(R.drawable.ic_launcher_background, "cc"));


        WordAdapter adapter = new WordAdapter(this);
        recyclerView.setAdapter(adapter);
        adapter.addItems(wordList);
    }

    @Override
    public void onNoteClick(int position) {
        Log.d(TAG, "clicked on the position:" + position);


        Intent myIntent = new Intent(MainActivity.this, abc.class);
        myIntent.putExtra("dd", 1); 
        MainActivity.this.startActivity(myIntent);


        Intent feedbackIntent = new Intent(MainActivity.this, def.class);
        feedbackIntent.putExtra("ss", 0); 
        MainActivity.this.startActivity(feedbackIntent);

    }
}

这是我在“abc”的oncreate下添加的代码

Intent myIntent = getIntent();
String value = myIntent.getStringExtra("dd" );

这是我在“def”的oncreate下添加的代码

Intent intent = getIntent();
        String value = intent.getStringExtra("ss");

这是名为 WordAdapter 的适配器

public class WordAdapter extends RecyclerView.Adapter<WordAdapter.ViewHolder> {

    private List<Word> wordList;
    private OnNoteListener mOnNoteListener;

    public WordAdapter(List<Word> wordList, OnNoteListener onNoteListener) {
        this.wordList = wordList;
        this.mOnNoteListener = onNoteListener;
    }

    public WordAdapter(OnNoteListener onNoteListener) {
        this(new ArrayList<Word>(), onNoteListener);
    }

    public void addItems(List<Word> items) {
        wordList.addAll(items);
        notifyDataSetChanged();
    }

    public void clear() {
        wordList.clear();
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_items, viewGroup, false);
        return new ViewHolder(view, mOnNoteListener);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder viewholder, int position) {
        int resource = wordList.get(position).getImageResource();
        String title = wordList.get(position).getTitle();
        viewholder.setData(resource, title);
    }

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

    static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        private ImageView imageView;
        private TextView title;

        private OnNoteListener onNoteListener;

        public ViewHolder(@NonNull View itemView, OnNoteListener onNoteListener) {
            super(itemView);

            imageView = itemView.findViewById(R.id.imageView);
            title = itemView.findViewById(R.id.word);
            this.onNoteListener = onNoteListener;

            itemView.setOnClickListener(this);
        }

        private void setData(int resource, String titleText) {
            imageView.setImageResource(resource);
            title.setText(titleText);
        }

        @Override
        public void onClick(View view) {
            onNoteListener.onNoteClick(getAdapterPosition());
        }
    }

    public interface OnNoteListener {
        void onNoteClick(int position);
    }
}

我知道我错了:(。我是初学者，请容忍这些并推荐解决方案。在此处输入代码

Answer 1

试试这个，

在这里，我将 recyclerview 项目的相应标题传递给 Activity 。这样我们就可以在 MainActivity 中处理了。

在您的 WordAdapter 类中，将下面的方法插入 ViewHolder

@Override
public void onClick(View view) {
   onNoteListener.onNoteClick(getAdapterPosition(), wordList.get(position).getTitle());
}

然后像下面的代码一样改变你的interface参数，

 public interface OnNoteListener {
        void onNoteClick(int position, String title);
    }

紧随其后的是 MainActivity，从 WordAdapter 将值集 Intent 传递给适当的 Activity ，如下面的代码所示。

@Override
    public void onNoteClick(int position, String title) {
        Log.d(TAG, "clicked on the position:" + position);
        if(title.equalsIgnoreCase("dd"){
            Intent myIntent = new Intent(MainActivity.this, abc.class);
            myIntent.putExtra("dd", 1); 
            MainActivity.this.startActivity(myIntent);
        }
        else {
            Intent feedbackIntent = new Intent(MainActivity.this, def.class);
            feedbackIntent.putExtra("ss", 0); 
            MainActivity.this.startActivity(feedbackIntent);
        }

    }