拉刷新recyclerview android

您好，我有一个选项卡式活动，在第一个选项卡中，我从服务器获取数据，并将其显示在卡视图中的recyclerview中。为了从服务器获取数据，我使用了volley库。我想实现Pull-to-refresh来加载数据（因此，每当我拉动它时，它都必须向网络发出请求）。而且，每当我在选项卡之间切换时，我也想禁用网络请求（因为当我在应用程序中更改选项卡焦点时，它开始获取数据），我只想执行一次网络请求（当用户第一次登录时），然后其他人请求仅通过拉动刷新来管理

这是我的片段，我在其中循环查看并显示数据：

public class Tab1History extends Fragment
{

private RecyclerView recyclerView;
private CespiteAdapter adapter;
UserSessionManager session;

private static final String URL_DATA = "http://mydata.php";

private List<CespiteOgg> cespiteOggList;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState)
{

    View rootView = inflater.inflate(R.layout.tab1history, container, false);

    recyclerView = (RecyclerView) rootView.findViewById(R.id.my_recycler_view);
    recyclerView.setHasFixedSize(true);//every item of the RecyclerView has a fix size
    recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));

    cespiteOggList = new ArrayList<>();

    loadRecyclerViewData();

            return rootView;
}

private void loadRecyclerViewData()
{
    // Session class instance
    session = new UserSessionManager(getActivity());
    //get user data from session
    HashMap<String, String> user = session.getUserDetails();
    //get name
    String name = user.get(UserSessionManager.KEY_NAME);
    // get username
    final String usernameUtente = user.get(UserSessionManager.KEY_USERNAME);

    final ProgressDialog progressDialog = new ProgressDialog(getActivity());
    progressDialog.setMessage("Carimento dati...");
    progressDialog.show();

    StringRequest stringRequest = new StringRequest(Request.Method.POST,
            URL_DATA,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String s) {
                    progressDialog.dismiss();
                    try {
                        JSONObject jsonObject = new JSONObject(s);
                        JSONArray array = jsonObject.getJSONArray("dates");

                        for(int i=0; i<array.length(); i++)
                        {
                            JSONObject o = array.getJSONObject(i);
                            CespiteOgg item = new CespiteOgg(
                                    o.getString("CodNumInventario"),
                                    o.getString("Nome"),
                                    o.getString("DtCatalogazione"),
                                    o.getString("CodIdA"),
                                    o.getString("username")
                            );
                            cespiteOggList.add(item);
                        }

                        adapter = new CespiteAdapter(cespiteOggList, getActivity());
                        recyclerView.setAdapter(adapter);

                    } catch (JSONException e) {
                        e.printStackTrace();
                    }

                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    progressDialog.dismiss();
                }
            })
            {
                @Override
                protected Map<String, String> getParams() throws AuthFailureError {
                    Map<String, String> params = new HashMap<String, String>();
                    params.put("Username", usernameUtente);
                    return params;
                }
            };

    RegisterRequest.getmInstance(getActivity()).addToRequestque(stringRequest);

}
}

public类Tab1History扩展片段
{
私人回收站；
专用CespiteAdapter适配器；
用户会话管理器会话；
私有静态最终字符串URL_DATA=”http://mydata.php";
私人名单；种族主义者；
@凌驾
创建视图上的公共视图（布局、充气机、视图组容器、，
Bundle savedInstanceState）
{
视图根视图=充气机。充气（R.layout.tab1历史记录，容器，false）；
recyclerView=（recyclerView）rootView.findViewById（R.id.my\u recycler\u视图）；
setHasFixedSize（true）；//recyclerView的每个项都有一个固定大小
setLayoutManager（新的LinearLayoutManager（getContext（））；
cespiteoglist=newarraylist（）；
loadRecycleServiceWdata（）；
返回rootView；
}
私有void loadRecyclerViewData（）
{
//会话类实例
session=newusersessionmanager（getActivity（））；
//从会话获取用户数据
HashMap user=session.getUserDetails（）；
//得名
String name=user.get（UserSessionManager.KEY\u name）；
//获取用户名
最后一个字符串usernameunte=user.get（UserSessionManager.KEY\u USERNAME）；
final ProgressDialog ProgressDialog=新建ProgressDialog（getActivity（））；
progressDialog.setMessage（“Carimento dati…”）；
progressDialog.show（）；
StringRequest StringRequest=新StringRequest（Request.Method.POST，
URL\u数据，
新的Response.Listener（）{
@凌驾
公共void onResponse（字符串s）{
progressDialog.disclose（）；
试一试{
JSONObject JSONObject=新的JSONObject；
JSONArray数组=jsonObject.getJSONArray（“日期”）；
对于（inti=0；iAndroid有一个小部件来实现这一点


这个问题在这里已经得到了回答，您可以使用android widget而不是
ProgressDialog

按照以下步骤将
SwipeRefreshLayout
集成到
Tab1history
片段中：

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


private List<CespiteOgg> cespiteOggList;
private Context context;

public CespiteAdapter(List<CespiteOgg> cespiteOggList, Context context) {

    this.cespiteOggList = cespiteOggList;
    this.context = context;
}

public class ViewHolder extends RecyclerView.ViewHolder
{

    public CardView cv;
    public TextView txtNumInventario;
    public TextView txtNomeCespite;
    public TextView txtDtCatalogazione;
    public TextView txtAula;
    public TextView txtNomeUser;


    ViewHolder(View itemView)
    {

        super (itemView);
        //cv = (CardView) itemView.findViewById(R.id.cardView);
        txtNumInventario = (TextView) itemView.findViewById(R.id.txtNumeroInventario);
        txtNomeCespite = (TextView) itemView.findViewById(R.id.txtNomeCespite);
        txtDtCatalogazione = (TextView) itemView.findViewById(R.id.txtDataCatalogazione);
        txtAula = (TextView) itemView.findViewById(R.id.txtAula);
        txtNomeUser= (TextView) itemView.findViewById(R.id.txtNomeUser);


    }
}



@Override
public CespiteAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
{

    LayoutInflater inflater = LayoutInflater.from(parent.getContext());

    View cespiteView = inflater.inflate(R.layout.cespite_card_view, parent, false);

    return new ViewHolder(cespiteView);
}

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

    CespiteOgg cespiteOgg = cespiteOggList.get(position);

    holder.txtNumInventario.setText(cespiteOgg.getNumInventario());
    holder.txtNomeCespite.setText(cespiteOgg.getNomeCespite());
    holder.txtDtCatalogazione.setText(cespiteOgg.getDtCatalogazione());
    holder.txtAula.setText(cespiteOgg.getAula());
    holder.txtNomeUser.setText(cespiteOgg.getNomeUser());

}

@Override
public int getItemCount()
{

    return cespiteOggList.size();
}

}

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/simpleSwipeRefreshLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        < Add View's Here..../>
</android.support.v4.widget.SwipeRefreshLayout>

1。在版面
tab1history
中，添加
SwipeRefreshLayout
作为根版面，并将
RecyclewrView
放在其中

// tab1history.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/swipe_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/my_recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

</android.support.v4.widget.SwipeRefreshLayout>

希望这能正常工作。
在Android Studio–SwipeRefreshLayout中拖动以刷新ListView和RecyclerView示例。我希望这段代码能正常工作。您可以尝试这段代码

刷新的基本拉动/SwipeRefreshLayout XML代码：

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


private List<CespiteOgg> cespiteOggList;
private Context context;

public CespiteAdapter(List<CespiteOgg> cespiteOggList, Context context) {

    this.cespiteOggList = cespiteOggList;
    this.context = context;
}

public class ViewHolder extends RecyclerView.ViewHolder
{

    public CardView cv;
    public TextView txtNumInventario;
    public TextView txtNomeCespite;
    public TextView txtDtCatalogazione;
    public TextView txtAula;
    public TextView txtNomeUser;


    ViewHolder(View itemView)
    {

        super (itemView);
        //cv = (CardView) itemView.findViewById(R.id.cardView);
        txtNumInventario = (TextView) itemView.findViewById(R.id.txtNumeroInventario);
        txtNomeCespite = (TextView) itemView.findViewById(R.id.txtNomeCespite);
        txtDtCatalogazione = (TextView) itemView.findViewById(R.id.txtDataCatalogazione);
        txtAula = (TextView) itemView.findViewById(R.id.txtAula);
        txtNomeUser= (TextView) itemView.findViewById(R.id.txtNomeUser);


    }
}



@Override
public CespiteAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
{

    LayoutInflater inflater = LayoutInflater.from(parent.getContext());

    View cespiteView = inflater.inflate(R.layout.cespite_card_view, parent, false);

    return new ViewHolder(cespiteView);
}

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

    CespiteOgg cespiteOgg = cespiteOggList.get(position);

    holder.txtNumInventario.setText(cespiteOgg.getNumInventario());
    holder.txtNomeCespite.setText(cespiteOgg.getNomeCespite());
    holder.txtDtCatalogazione.setText(cespiteOgg.getDtCatalogazione());
    holder.txtAula.setText(cespiteOgg.getAula());
    holder.txtNomeUser.setText(cespiteOgg.getNomeUser());

}

@Override
public int getItemCount()
{

    return cespiteOggList.size();
}

}

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/simpleSwipeRefreshLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        < Add View's Here..../>
</android.support.v4.widget.SwipeRefreshLayout>

源代码


APK


XML代码

<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/swipe_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/layout_titlebar">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/layout_titlebar"
        android:layout_margin="5dp"
        />

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>


泳道布局泳道布局；
//获取SwipeContainerLayout
swipeLayout=findviewbyd（R.id.swipe_container）；；
//swip侦听器
swipeLayout.setOnRefreshListener（新的SwipeRefreshLayout.OnRefreshListener（）{
@凌驾
公共void onRefresh（）{
loadData（）；
swipeLayout.setRefreshing（false）；
}
});
}
检查此链接我想在recyclerview的swipeleft上调用api…这怎么可能？谢谢！！成功了
public class BooksActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener {

            SwipeRefreshLayout swipLayout;
            RecyclerView recyclerview;

        @Override
            protected void onCreate(@Nullable Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity);
                recyclerview = view.findViewById(R.id.recyclerview);
                swipLayout = view.findViewById(R.id.swipe_layout);
                swipLayout.setOnRefreshListener(this);
            }//end of onCreate

        @Override
            public void onRefresh() {
        //your refresh code here
           loadRecyclerViewData()
             }

        private void loadRecyclerViewData(){
        onSuccess(){
        //don't forget to stop refreshing
        swipLayout.setRefreshing(false);
        }

        onFaliure(){
        //don't forget to stop refreshing
        swipLayout.setRefreshing(false);
        }
    }
    }

<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
    android:id="@+id/swipe_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_home"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="10dp"
        />


</androidx.swiperefreshlayout.widget.SwipeRefreshLayout> 



  SwipeRefreshLayout swipeLayout;  

  //Getting SwipeContainerLayout
  swipeLayout = findViewById(R.id.swipe_container);;


    //swip listener
    swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            loadData();
            swipeLayout.setRefreshing(false);
        }
    });
}