便笺簿应用程序编辑
便笺簿应用程序编辑
提问于 2018-06-11 07:59:16
我试图开发一个应用程序(注：Pad)，但是删除和编辑扣子对于每个不起作用的帖子，例如，如果我单击“删除”扣子对于POST编号4和每个帖子，POST编号0将删除，同样用于编辑。
怎么能得到position每个职位RecyclerView，它可以删除和编辑函数。
守则：
public class NoteAdapter extends RecyclerView.Adapter<NoteAdapter.NoteViewHolder> {
public static final int REQUEST_FOR_ACTIVITY_CODE = 102;
public static int itemPosition;
public static String state = "";
private Context context;
private List<Note> notes = new ArrayList<>();
Note note = new Note();
public NoteAdapter(Context context) {
this.context = context;
}
@NonNull
@Override
public NoteViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
return new NoteViewHolder(LayoutInflater.from(context).inflate(R.layout.layout_item_note, parent, false));
}
@Override
public void onBindViewHolder(@NonNull final NoteViewHolder holder, int position) {
holder.bindNote(notes.get(position));
holder.editButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
state = "edit";
Intent editintent = new Intent(context, NoteActivity.class);
editintent.putExtra("title", holder.textViewTitle.getText().toString());
editintent.putExtra("content", holder.textViewContent.getText().toString());
// context.startActivity(editintent);
((Activity) context).startActivityForResult(editintent, REQUEST_FOR_ACTIVITY_CODE);
}
});
holder.removeButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
removeNote(itemPosition);
}
});
}
@Override
public int getItemCount() {
return notes.size();
}
public class NoteViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView textViewTitle;
public TextView textViewContent;
public ImageButton removeButton;
public ImageButton editButton;
public NoteViewHolder(View itemView) {
super(itemView);
textViewTitle = itemView.findViewById(R.id.txt_title);
textViewContent = itemView.findViewById(R.id.txt_note);
removeButton = itemView.findViewById(R.id.btn_remove);
editButton = itemView.findViewById(R.id.btn_edit);
}
public void bindNote(Note note) {
textViewTitle.setText(note.getTitle());
textViewContent.setText(note.getContent());
}
@Override
public void onClick(View v) {
itemPosition = note.getId();
}
}
public void setNote(Note note) {
notes.add(note);
notifyItemInserted(notes.size() - 1);
}
public void setEditNote(Note note) {
notes.set(itemPosition, note);
notifyDataSetChanged();
}
public void removeNote(int position) {
notes.remove(position);
notifyItemRemoved(position);
}
public void clearAll() {
notes = new ArrayList<>();
notifyDataSetChanged();
}}
回答 1
Stack Overflow用户
发布于 2018-06-11 17:26:26
将单击侦听器设置为NoteViewHolder，而不是NoteAdapter，以便在viewHolder调用中查找项目位置getAdapterPosition()
你的方法可以这样实现：
第一，创建接口NoteEditListener
interface NoteEditListener {
void edit(int position);
}第二，实现此接口NoteAdapter和覆盖edit方法
public class NoteAdapter implements NoteEditListener
public void edit(int position){
// todo edit your item in position
}第三，添加NoteEditListener到viewHolder构造函数并传递this从适配器
public class NoteViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView textViewTitle;
public TextView textViewContent;
public ImageButton removeButton;
public ImageButton editButton;
public NoteViewHolder(View itemView, final NoteEditListener listener) {
super(itemView);
textViewTitle = itemView.findViewById(R.id.txt_title);
textViewContent = itemView.findViewById(R.id.txt_note);
removeButton = itemView.findViewById(R.id.btn_remove);
editButton = itemView.findViewById(R.id.btn_edit);
editButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
listener.edit(getAdapterPosition());
}
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/-100004839
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