Question

我有一个recyclerview，我想在回收器填充来自json的数据时显示“loading ...”消息或旋转圈。这是我的回收商的代码：

TcpListener

这是适配器：

 arrayList = new ArrayList<>();      
    adapter = new ListAdapterGrupat2(this, arrayList, Comanda.class);
    list.setAdapter(adapter);
    final Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("http://mysite/")
            .addConverterFactory(GsonConverterFactory.create())
            .build();
    service = retrofit.create(API.class);  

    if (myuser.equals("1")) {
        service.getComenzileMele(user).enqueue(listener);

    } else {
        service.getComenziGrupat().enqueue(listener);
    }
}
Callback<List<CustomObject>> listener = new Callback<List<CustomObject>>() {

    @Override
    public void onResponse(Call<List<CustomObject>> call, Response<List<CustomObject>> response) {
        arrayList.clear();
        arrayList.addAll(response.body());
        adapter.notifyDataSetChanged();
    }

    @Override
    public void onFailure(Call<List<CustomObject>> call, Throwable t) {
        Toast.makeText(ComenziGrupatActivity.this, "ERROR", Toast.LENGTH_SHORT).show();           
    }
};

Answer 1

将ProgressBar添加到您的班级和布局（靠近您的recicleView）。如果你想要文字：添加LinearLayout并放置ProgressBar和TextView（触发linearLayout上的可见性）：

ProgressBar bar;

当您发出请求并隐藏recicleView时显示progressBar：

bar.setVisibility(VISIBLE);
recicleView.setVisibility(GONE);     
service.getComenzileMele(user).enqueue(listener);

请求完成后隐藏progressBar并恢复recicleView：

Callback<List<CustomObject>> listener = new Callback<List<CustomObject>>() {

    @Override
    public void onResponse(Call<List<CustomObject>> call, Response<List<CustomObject>> response) {
        bar.setVisibility(GONE);
        recicleView.setVisibility(VISIBLE);
    }

    @Override
    public void onFailure(Call<List<CustomObject>> call, Throwable t) {
        bar.setVisibility(GONE);
        recicleView.setVisibility(VISIBLE);         
    }
};

如何在recyclerview中显示加载消息

1 个答案: