如何在 RecyclerView Android 中更快地加载项目

如何解决如何在 RecyclerView Android 中更快地加载项目

每当数据添加到服务器时，回收器视图加载缓慢，我使用 API 获取数据。 安装应用程序或在数据库中添加项目时，它加载缓慢约 3-5 秒，但当我重新打开应用程序时，它工作正常。 我使用的数据库是 MysqL PHPadmin，我使用 Volley 库从 API 中获取数据

问题

如何加快加载数据的过程，或者有什么方法可以在后台加载数据，这样无论何时用户打开应用程序，他都不必像上面提到的那样等待几秒钟。

 private void loadRecyclerViewData(){

    ProgressDialog progressDialog = new ProgressDialog(getContext());
    progressDialog.setMessage("Please wait your stories are loading...");
    progressDialog.show();
    
    String URL_DATA = "https://.../webservices/api/getstories.PHP";

    //fetch the data from the server

    StringRequest stringRequest = new StringRequest(Request.Method.GET,URL_DATA,response -> {
                progressDialog.dismiss();
                try {
                    JSONObject jsonObject = new JSONObject(response);
                    JSONArray array = jsonObject.getJSONArray("data");

                    for(int i =0; i<array.length(); i++){
                        JSONObject o = array.getJSONObject(i);
                        StoriesModel item = new StoriesModel    (
                               
                                o.getString("story"),o.getString("conclusion"),o.getString("rating"),o.getString("author")


                        );
                        storiesModels.add(item);
                    }

                  
                    mAdapter = new StoriesAdapter(storiesModels,getContext());
                    recyclerView.setAdapter(mAdapter);
                  

                } catch (JSONException e) {
                    e.printstacktrace();
                }
            },error -> {
                progressDialog.dismiss();
                Toast.makeText(getContext(),(CharSequence) new VolleyError(),Toast.LENGTH_LONG).show();

            });
    RequestQueue requestQueue = Volley.newRequestQueue(getContext());
    requestQueue.add(stringRequest);

}

适配器类：-

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

private List < StoriesModel > storiesModels;
private final Context context;

public StoriesAdapter(List < StoriesModel > storiesModels,Context context) {
    this.storiesModels = storiesModels;
    this.context = context;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent,int viewType) {
    View view = LayoutInflater.from(parent.getContext())
        .inflate(R.layout.card,parent,false);
    return new ViewHolder(view);
}

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

    StoriesModel storiesModel = storiesModels.get(position);

    holder.authorName.setText(storiesModel.getAuthor());
    holder.conclusion.setText(storiesModel.getConclusion());
    holder.rating.setText(storiesModel.getrating());
    holder.story.setText(storiesModel.getStory());


    holder.relativeLayout.setonClickListener(v - > {
        Intent intent = new Intent(context,DetailActivity.class);
        intent.putExtra("authorName",storiesModel.getAuthor());
        intent.putExtra("conclusion",storiesModel.getConclusion());

        intent.putExtra("rating",storiesModel.getrating());

        intent.putExtra("story",storiesModel.getStory());


        context.startActivity(intent);

    });

}

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

    
}

public static class ViewHolder extends RecyclerView.ViewHolder {

    public final TextView authorName;
    public final TextView conclusion;
    public final TextView rating;
    public final TextView story;
    public final RelativeLayout relativeLayout;


    public ViewHolder(@NonNull View itemView) {
        super(itemView);

        authorName = itemView.findViewById(R.id.authorName);

        conclusion = itemView.findViewById(R.id.conclusion);

        rating = itemView.findViewById(R.id.rating);

        story = itemView.findViewById(R.id.story);



        relativeLayout = itemView.findViewById(R.id.Newlinear_layout);

    }
}

}

解决方法

1. 在您的 Api 中进行分页
2. 使用 Retrofit 而不是 Volley。 You can check it.