我正在使用 RecyclerView 和 CardView。我想将 OnClickListner 附加到每张卡片。我尝试了 stackoverflow 上的许多可用答案，但它们对我不起作用。到目前为止，我已经尝试过-

public class SubjectAdapter extends RecyclerView.Adapter<SubjectAdapter.ViewHolder> implements View.OnClickListener,
    View.OnLongClickListener{

private static final String LOGCAT = "SubjectAdapter";
private final Context mContext;

List<Subject> SubjectsList;

public SubjectAdapter(Context context) {
    super();
    this.mContext = context;
    SQLiteDatabase.loadLibs(mContext);
    DBHelper myDbHelper = new DBHelper(mContext);
    SubjectsList = new ArrayList<Subject>();
    SubjectsList = myDbHelper.getAllSubjects();
    myDbHelper.close();
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View v = LayoutInflater.from(viewGroup.getContext())
            .inflate(R.layout.subject_cardview_row, viewGroup, false);
    ViewHolder viewHolder = new ViewHolder(v);

    // Below two lines are NOT working
    viewHolder.tvSubjectName.setOnClickListener(this);
    //viewHolder.setOnClickListener(this);

    return viewHolder;
}

@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
    Subject subject = SubjectsList.get(i);
    viewHolder.tvSubjectName.setText(subject.getSubject_Name());
    viewHolder.tvCounts.setText(String.valueOf(subject.getSubject_Number_of_Questions()));

    // Below two lines are NOT working
    viewHolder.tvSubjectName.setOnClickListener(this);
    //viewHolder.setOnClickListener(this);
}

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

@Override
public void onClick(View v) {
    // It's not working either
    ViewHolder holder = (ViewHolder) v.getTag();
    int position = holder.getPosition();

    if (v.getId() == holder.tvSubjectName.getId()){
        Log.d(LOGCAT, "tvSubjectName onClick at" + position);
        //Toast.makeText(mContext, "tvSubjectName onClick at" + position, Toast.LENGTH_LONG).show();
    } else {
        Log.d(LOGCAT, "RecyclerView Item onClick at " + position);
        //Toast.makeText(mContext, "RecyclerView Item onClick at " + position, Toast.LENGTH_LONG).show();
    }
}

@Override
public boolean onLongClick(View v) {
    return false;
}

class ViewHolder extends RecyclerView.ViewHolder {

    public TextView tvSubjectName;
    public TextView tvCounts;

    public ViewHolder(View itemView) {
        super(itemView);
        tvSubjectName = (TextView) itemView.findViewById(R.id.tv_subject_name);
        tvCounts = (TextView) itemView.findViewById(R.id.tv_text_counts);
    }
}
}

如您所见，我已尝试将 setOnClickListener 与 onCreateViewHolder 和 onBindViewHolder 一起使用，也作为单独的 onClick ，但他们似乎都不适合我。所以，我想知道，如何将 OnClickListner 添加到 CardView？

最佳答案

onClick 返回的View 不一定对应于recycler view 的View row hierarchy。 我认为你应该用

@Override
public void onBindViewHolder(final ViewHolder viewHolder, final int i) {
   final Subject subject = SubjectsList.get(i); 
   viewHolder.tvSubjectName.setOnClickListener(new View.OnClickListener(){


    @Override
    public void onClick(View v) {
        Log.d(LOGCAT, "tvSubjectName onClick at" + i);
       // etc
    }

   });
...
}

如果您使用长按，则将 View.OnClickListener 替换为 View.OnLongClickListener 并将 onClick 替换为 onLongClick。

关于android - 如何将 OnClickListener 添加到 CardView？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30142329/