IconUtils.java 文件源码

public static Drawable loadMimeIcon(
        Context context, String mimeType, String authority, String docId, int mode) {

    if (Document.MIME_TYPE_DIR.equals(mimeType)) {
        if (MediaDocumentsProvider.AUTHORITY.equals(authority)) {
            if(docId.startsWith(MediaDocumentsProvider.TYPE_ALBUM)){
                return ContextCompat.getDrawable(context, R.drawable.ic_doc_album);
            }
            else if(docId.startsWith(MediaDocumentsProvider.TYPE_IMAGES_BUCKET)){
                return ContextCompat.getDrawable(context, R.drawable.ic_doc_folder);
            }
            else if(docId.startsWith(MediaDocumentsProvider.TYPE_VIDEOS_BUCKET)){
                return ContextCompat.getDrawable(context, R.drawable.ic_doc_folder);
            }
        }

        if (mode == DocumentsActivity.State.MODE_GRID) {
            return ContextCompat.getDrawable(context, R.drawable.ic_grid_folder);
        } else {
            return ContextCompat.getDrawable(context, R.drawable.ic_doc_folder);
        }
    }

    return loadMimeIcon(context, mimeType);
}