用于不同列表和对象的多个适配器或一个适配器 - 代码性能

在性能方面，什么是在Android应用程序中实现的更好选项：

• 多个适配器，用于每个具有不同布局的对象列表，

• 单个适配器，处理不同的数据 .

我们假设我们需要创造

• 评论，

• 视频，

• 问题

在适配器中列出正确显示数据 . 每个列表属于不同的布局，因此我们有不同的 TextViews ， ImageViews 等 .

公共类FilesAdapter扩展了RecyclerView.Adapter {

public static final int VIDEO_FILES_ADAPTER = 1; public static final int COMMENT_ADAPTER = 2; public static final int QUESTIONS_ADAPTER = 3;

private int CURRENT_ADAPTER;

私人列表videoFiles;私人清单评论;私人清单问题;

boolean isForUser;

public FilesAdapter（int currentAdapter，List videoFiles，boolean isForUser）

public FilesAdapter（int currentAdapter，List comments）

public FilesAdapter（int currentAdapter，List questions，int unusedVariable）

@NonNull @Override public FilesViewHolder onCreateViewHolder（@NonNull ViewGroup parent，int viewType）{View view; FilesViewHolder viewHolder;

switch(CURRENT_ADAPTER){

    case VIDEO_FILES_ADAPTER:

        if(isForUser){
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_layout_file_user, parent, false);
        }else{
            view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_layout_file_main, parent, false);
        }

        viewHolder = new FilesViewHolder(VIDEO_FILES_ADAPTER, view, isForUser);

        return viewHolder;

    case COMMENT_ADAPTER:
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_layout_comment, parent, false);
        viewHolder = new FilesViewHolder(COMMENT_ADAPTER, view, false);

        return viewHolder;

    case QUESTIONS_ADAPTER:
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_layout_question, parent, false);
        viewHolder = new FilesViewHolder(QUESTIONS_ADAPTER, view, false);

        return viewHolder;
}

return null;

}

@Override public void onBindViewHolder（@NonNull FilesViewHolder holder，int position）{

switch (CURRENT_ADAPTER){

    case VIDEO_FILES_ADAPTER:
        holder.videoTitle.setText(videoFiles.get(position).getFileName());
        holder.videoDescription.setText(videoFiles.get(position).getFileDescription());
        if(isForUser){
            holder.videoDate.setText(videoFiles.get(position).getFileCreatedAt());
        }else{
            holder.videoUser.setText(videoFiles.get(position).getUsername());
        }

        holder.videoCount.setText(videoFiles.get(position).getWatched());
        break;

    case COMMENT_ADAPTER:
        holder.commentComment.setText(comments.get(position).getComment());
        holder.commentUsername.setText(comments.get(position).getUsername());
        holder.commentCreatedAt.setText(comments.get(position).getCreatedAt());
        break;

    case QUESTIONS_ADAPTER:
        holder.questionTitle.setText(questions.get(position).getProviderUsername());
        break;
}

}

@Override public int getItemCount（）{

switch (CURRENT_ADAPTER){
    case VIDEO_FILES_ADAPTER:
        return videoFiles.size();
    case COMMENT_ADAPTER:
        return comments.size();
    case QUESTIONS_ADAPTER:
        return questions.size();
}

return 0;

}

public static class FilesViewHolder扩展了RecyclerView.ViewHolder {

private static final int VIDEO_FILES_ADAPTER = 1;
private static final int COMMENT_ADAPTER = 2;
private static final int QUESTIONS_ADAPTER = 3;

private int CURRENT_ADAPTER;

// Related to audio file class
public TextView videoTitle, videoDescription, videoDate, videoUser, videoCount;

// Related to comment class
private TextView commentComment, commentUsername, commentCreatedAt;

// Related to subscription class
private TextView questionTitle;


// @param isForUser applies only if CURRENT_ADAPTER == VIDEO_FILES_ADAPTER
public FilesViewHolder(int CURRENT_ADAPTER, View itemView, boolean isForUser) {
    super(itemView);

    switch(CURRENT_ADAPTER){

        case VIDEO_FILES_ADAPTER:

            videoTitle = itemView.findViewById(R.id.tV_title);
            videoDescription = itemView.findViewById(R.id.tV_description);
            if(isForUser){
                videoDate = itemView.findViewById(R.id.tV_date);
            }else{
                videoUser = itemView.findViewById(R.id.tV_username);
            }
            videoCount = itemView.findViewById(R.id.tV_watched);

            break;

        case COMMENT_ADAPTER:

            commentComment = itemView.findViewById(R.id.tV_comment);
            commentUsername = itemView.findViewById(R.id.tV_comment_username);
            commentCreatedAt = itemView.findViewById(R.id.tV_comment_created_at);

            break;

        case QUESTIONS_ADAPTER:

            questionTitle = itemView.findViewById(R.id.tV_question);

            break;
    }

}

}}

还有另一种方法可以做到这一点 . 每个列表的单个适配器例如：

public class CommentAdapter extends RecyclerView.Adapter<CommentAdapter.CommentViewHolder>{

private List<Comment> commentList;

public CommentAdapter(List<Comment> comments){
    this.commentList = comments;
}

public static class CommentViewHolder extends RecyclerView.ViewHolder{

    private TextView comment, username, createdAt;

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

        comment = itemView.findViewById(R.id.tV_comment);
        username = itemView.findViewById(R.id.tV_comment_username);
        createdAt = itemView.findViewById(R.id.tV_comment_created_at);
    }
}

@NonNull
@Override
public CommentViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_layout_comment, parent, false);

    return new CommentViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull CommentViewHolder holder, int position) {
    holder.comment.setText(commentList.get(position).getComment());
    holder.username.setText(commentList.get(position).getUsername());
    holder.createdAt.setText(commentList.get(position).getCreatedAt());
}

@Override
public int getItemCount() {
    return commentList.size();
}

}

我的问题是在性能方面哪些更好实施？如果我决定为不同的列表实现一个适配器，是否会出现明显的性能延迟或补丁？