android - 如果我无法获得上下文，我怎么能像 picasso 一样使用？

Question

我使用 firbase-ui 显示一个 recyclerView ，它扩展了 Activity ，就像这样:

FirebaseRecyclerAdapter adapter = new FirebaseRecyclerAdapter<ChatItem, ExpenseHolder>
                (ChatItem.class, R.layout.chat_room_list, ExpenseHolder.class, secondRoot) {
            @Override
            protected void populateViewHolder(ExpenseHolder viewHolder, ChatItem chatItem, int position) {
                viewHolder.setValues(chatItem);
            }
        };
        recyclerChat.scrollToPosition(adapter.getItemCount() - 1);//just let the latest data below
        //recyclerChat.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));//增加橫線
        recyclerChat.setAdapter(adapter);

        LinearLayoutManager manager = new LinearLayoutManager(this);
        manager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerChat.setLayoutManager(manager);

这是我的 ExpenseHolder ，我发现它必须是静态的，否则会导致崩溃

    public static class ExpenseHolder extends RecyclerView.ViewHolder {
            private final TextView textRightMsg;
            private final TextView textLeftMsg;
            private final TextView rightTime;
            private final ImageView rightImage;

            public ExpenseHolder(View itemView) {
                super(itemView);

                textRightMsg = (TextView) itemView.findViewById(R.id.textRight);
                textLeftMsg = (TextView) itemView.findViewById(R.id.textLeft);
                rightTime = (TextView) itemView.findViewById(R.id.rightTime);
                rightImage = (ImageView) itemView.findViewById(R.id.rightImage);
            }

            public void setValues(ChatItem chatItem) {
                String myName = chatItem.getName();
                if (myName.equals(userName)) {
                    textRightMsg.setText(chatItem.getMsg() + "(" + chatItem.getName() + ")");
                    rightTime.setText(chatItem.getTime());
// I don't know how to get context in this class                    
Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(rightImage);
                } else {
                    textLeftMsg.setText(chatItem.getMsg() + "(" + chatItem.getName() + ")");
                }
            }
        }

当我想使用 Picaso 设置图像时，我发现我无法获取 contex

我尝试设置全局 privat static Context contex; ，它显示 error context is null 。

这是我要显示的资源

如何在静态环境中显示资源为 url 的图像？

Answer 1

试试这个方法..

Picasso.with(rightImage.getContext()).load("http://i.imgur.com/DvpvklR.png").into(rightImage);