Question

我正在使用SwipeRefreshLayout进行我的recyclerview。我通过进行api调用在recyclerview中显示数据，我在刷卡刷新时调用api。我遇到的问题是，如果列表大小为零，则刷卡刷新不起作用。即使列表大小为零，我想在刷卡刷新时进行api调用，以便在有任何新数据的情况下更新列表。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

        <android.support.v7.widget.RecyclerView
            android:id="@+id/datalist"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/homebackground"
            android:clipToPadding="false"

            android:paddingBottom="8dp"

            />



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

    <TextView
        android:id="@+id/tvNoData"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="No orders yet"
        android:textSize="20sp"
        android:visibility="gone" />
</RelativeLayout>

代码

   swiperefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                callLoginApi();
            }
        });
 private void callLoginApi() {

    APICALL(in, new Callback<Orssaf>() {
            @Override
            public void success(Result<Orssaf> result) {
                swiperefresh.setRefreshing(false);

                }
            }
            @Override
            public void failure(TwitterException e) {

                swiperefresh.setRefreshing(false);
            }
        });
    }

适配器

public class OrderHistoryAdapter extends RecyclerView.Adapter<OrderHistoryAdapter.MyViewHolder> {
    private Context mContext;
    private ArrayList<OrderDetailsData> orders;
    public OrderHistoryAdapter(Context context, ArrayList<OrderDetailsData> order) {
        mContext = context;
        orders = order;
    }
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_foodvitecurrentorder, parent, false);
        return new MyViewHolder(itemView);
    }
    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        OrderDetailsData order = orders.get(position);
        Picasso.with(mContext).load(order.getSenderImage()).placeholder(R.drawable.profile_img).transform(new CircleTransform()).into(holder.profileimage);
        holder.itemscount.setText("dfg"));
        holder.pricecount.setText("$fsdf"));
        holder.ordertime.setText("sdgsdg");
        holder.message.setText("greg");

        }
    }
    @Override
    public int getItemCount() {
        return orders.size();
    }
    public class MyViewHolder extends RecyclerView.ViewHolder {
        private CircularImageView profileimage;
        private TextView status, message, itemscount, pricecount, ordertime
        public MyViewHolder(View itemView) {
            super(itemView);
            profileimage = (CircularImageView) itemView.findViewById(R.id.profileimage);
            status = (TextView) itemView.findViewById(R.id.status);
            message = (TextView) itemView.findViewById(R.id.message);
            itemscount = (TextView) itemView.findViewById(R.id.itemscount);
            pricecount = (TextView) itemView.findViewById(R.id.pricecount);
            ordertime = (TextView) itemView.findViewById(R.id.ordertime);

        }
    }
}

根据答案更新..

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

        <android.foodviteseller.co.foodviteseller.views.RecyclerViewEmptySupport
            android:id="@+id/datalist"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/homebackground"
            android:clipToPadding="false"

            android:paddingBottom="8dp"

            />
        <TextView
            android:id="@+id/emptyView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerInParent="true"
            android:text="EmptyList"
            android:textSize="20sp"
            android:visibility="gone" />

        <!--<include layout="@layout/no_data_layout" />-->

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

    <TextView
        android:id="@+id/tvNoData"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="No orders yet"
        android:textSize="20sp"
        android:visibility="gone" />
</RelativeLayout>

代码

  datalist = (RecyclerViewEmptySupport) v.findViewById(R.id.datalist);

 private void callLoginApi() {

    APICALL(in, new Callback<Orssaf>() {
            @Override
            public void success(Result<Orssaf> result) {
                swiperefresh.setRefreshing(false);
              if (orders.size() > 0) {
    orderAdapter = new OrderHistoryAdapter(mContext, orders);
    datalist.setAdapter(orderAdapter);
} else {
    emptyView.setVisibility(View.VISIBLE);
   datalist.setEmptyView(emptyView);
    tvNoData.setVisibility(View.VISIBLE);
    tvNoData.setText("No orders yet");
}

                }
            }
            @Override
            public void failure(TwitterException e) {

                swiperefresh.setRefreshing(false);
            }
        });
    }

Answer 1

就像你说的那样，你的列表是空的，所以没有VIew可以滑动，你需要添加一个像listView.setEmptyView()一样的空视图。但由于RecyclerView没有setEmptyView()存在，所以请按照以下文章进行操作：

https://stackoverflow.com/a/30415582/4854450

这对我有用。

所以你的XML就像：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

        <android.support.v7.widget.RecyclerView
            android:id="@+id/datalist"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/homebackground"
            android:clipToPadding="false"
            android:paddingBottom="8dp"/>

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

    <TextView
        android:id="@+id/tvNoData"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="No orders yet"
        android:textSize="20sp"
        android:visibility="gone" />
</RelativeLayout>

编辑：列表为空时

    EmptyAdapter adapter = new EmptyAdapter();
    datalist.setAdapter(adapter);


public class EmptyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return null;
    }

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

    }

    @Override
    public int getItemCount() {
        return 0;
    }
}

Answer 2

更改RelativeLayout子视图的顺序。您没有列表项的顶级视图是TextView，因此它阻止了SwipeRefreshLayout。更改顺序应该有效，因为视图的Z顺序是由添加视图的顺序定义的。检查this answer

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:id="@+id/tvNoData"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:text="No orders yet"
    android:textSize="20sp"
    android:visibility="gone" />

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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/datalist"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/homebackground"
        android:clipToPadding="false"

        android:paddingBottom="8dp"

        />



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


</RelativeLayout>

当列表大小为零时，SwipeRefreshLayout不会刷卡

2 个答案: