android - 从 url 获取图标，从 drawable 获取图标，它只从 drawable 获取

Question

我在 drawable 中添加了一些手动图标，对于一些手动数据，它必须采用 drawable 并且如果图标不在 drawable 然后从 Glide 中获取它。

我试过类似的东西，但只有它从 drawable 获取图标。

我想检查图标是否存在于 drawable 从那里获取，如果对于一个 url，图标不在 drawable 则转到另一个语句并从 Glide 获取它.

下面是我的代码。
resID始终为0

String imageUrl = BASE_URL + arrayList.get(position).getSearchUrl() + "&size=32";

            int resID = context.getResources().getIdentifier("icon", "drawable",context.getPackageName());
            if (resID == 0) {
                Log.d("TAG", "onBindViewHolder: " + resID);
                viewHolder.tvIcon.setImageResource(arrayList.get(position).getIcon());
            } else {
                Log.d("TAG", "onBindViewHolder: Glide" + resID);
                Glide.with(context)
                        .load(imageUrl)
                        .apply(requestOptions
                                .placeholder(R.drawable.default_favicon)
                                .diskCacheStrategy(DiskCacheStrategy.ALL)
                                .fitCenter())
                        .into(viewHolder.tvIcon);
            }

Answer 1

您需要传递您的 arrayList.get(position).getIcon() 而不是 "icon" 在 context.getResources().getIdentifier()

中

另请阅读如何 getIdentifier()作品

Return a resource identifier for the given resource name. A fully qualified resource name is of the form "package:type/entry".

Returns : int The associated resource identifier. Returns 0 if no such resource was found. (0 is not a valid resource ID.)

试试这个

    int resID = context.getResources().getIdentifier(String.valueOf(arrayList.get(position).getIcon()), "drawable",context.getPackageName()); "drawable",context.getPackageName());
    // if resID == 0 means the icon is not available in drawable folder
    // so it will load icon from url using Glide
    if (resID == 0) {
        Log.d("TAG", "onBindViewHolder: Glide" + resID);
        Glide.with(context)
                .load(imageUrl)
                .apply(requestOptions
                        .placeholder(R.drawable.default_favicon)
                        .diskCacheStrategy(DiskCacheStrategy.ALL)
                        .fitCenter())
                .into(viewHolder.tvIcon);

    }
    // if resID != 0 means the icon is  available in drawable folder
    // so it will load icon from drawable folder
    else {
        Log.d("TAG", "onBindViewHolder: " + resID);
        viewHolder.tvIcon.setImageResource(resID);
    }