将颜色更改为recyclerview项目

我的recyclerview显示2个文字浏览和1个imageview。在适配器的onbindviewholder内部，我可以设置2个textview的文本，但是当我更改颜色时，它们变得不可见。将颜色更改为recyclerview项目

此外，当我删除recyclerview项目，然后“撤消”它，它会显示颜色的变化。我究竟做错了什么？

我怀疑它与notify ...（）方法之一有关，但当我尝试将其中的一个放在onbindviewholder中时，该应用程序将在启动时崩溃。

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

private CardView cv; 
private List<Memo> mMemos; 
private Context mContext; 
public List<Memo> memosToRemove; 

//pass in the list of notes to display 
public MemoListAdapter(List<Memo> memos, Context context) { 
    mMemos = memos; 
    mContext = context; 

} 

@Override 
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View rowView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_memo_list, parent, false); 
    ViewHolder viewHolder = new ViewHolder(rowView, mContext, mMemos); 


    return viewHolder; 
} 

//@param holder & position - identifies the Note we are working with 
@Override 
public void onBindViewHolder(final ViewHolder holder, int position) { 

    holder.memoTitle.setText(mMemos.get(position).getTitle()); 
    holder.memoContent.setText(mMemos.get(position).getContent()); 
    holder.memoIcon.setColorFilter(mMemos.get(position).getNotificationColor()); 
    holder.memoTitle.setTextColor(mMemos.get(position).getNotificationColor()); 
}

这里是一个将正确显示更改颜色

public void onItemRemove(final RecyclerView.ViewHolder viewHolder, final RecyclerView mRecyclerView) { 

    final int adapterPosition = viewHolder.getAdapterPosition(); 
    final int memoID = mMemos.get(adapterPosition).getId(); 
    final DatabaseHandler db = new DatabaseHandler(mContext); 
    final Memo memo = db.getMemo(memoID); 

    mMemos.remove(adapterPosition); 
    db.deleteMemo(memo); 
    notifyItemRemoved(adapterPosition); 

    Snackbar snackbar = Snackbar 
      .make(mRecyclerView, mContext.getString(R.string.note_deleted), Snackbar.LENGTH_LONG) 
      .setAction(R.string.undo_string, new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 
        mMemos.add(adapterPosition, memo); 
        notifyItemInserted(adapterPosition); 
        mRecyclerView.scrollToPosition(adapterPosition); 
        db.addMemo(memo); 
       } 
      });

[IMAGE] When app opens

然后我滑开音符，然后迅速按下Undo方法撤消

[IMAGE] After I press the undo delete on the snackbar

来源

2016-11-15 snlvtr

你改变颜色programmatially –

@snlvtr告诉我“mMemos.get（位置）.getNotificationColor（）” –

@snlvtr的价值尝试holder.memoTitle.setT一个测试用例的extColor（Color.RED）？并检查它是否工作 – Raghavendra

设法解决这个问题：

@Override 
public void onBindViewHolder(final ViewHolder holder, int position) { 
    Memo m = mMemos.get(position); 
    int id = m.getId(); 
    DatabaseHandler db = new DatabaseHandler(mContext); 
    Memo memo = db.getMemo(id); 
    int color = memo.getNotificationColor(); 

    holder.memoTitle.setText(mMemos.get(position).getTitle()); 
    holder.memoContent.setText(mMemos.get(position).getContent()); 
    holder.memoIcon.setColorFilter(color); 
    holder.memoTitle.setTextColor(color);

基本上，我不得不采取实际的项目或“备忘录”在我的情况下，直接从数据库中，而不是依靠服用基于@param位置备忘录

来源

2016-11-15 09:16:42 snlvtr

@Override 
public void onBindViewHolder(MyViewHolder holder, int position) { 
    if(position == selected_item) { 
     holder.title.setTextColor(Color.parseColor("#00aaff")); 
     holder.imgViewIcon.setBackgroundResource(R.drawable.ic_circle); 
    } else { 
     holder.title.setTextColor(Color.parseColor("#00000")); //actually you should set to the normal text color 
     holder.imgViewIcon.setBackgroundResource(0); 
    } 
    NavDrawerItem current = data.get(position); 
    holder.title.setText(current.getTitle()); 
    holder.imgViewIcon.setImageResource(current.getIcon()); 


}

编辑：辗转联系（本来是要编辑成OP）通过编辑onBindViewHolder这个

来源

2016-11-15 06:21:30

将颜色更改为recyclerview项目

回答

相关问题