那些正在寻找实现拉刷新功能的RecyclerView可以遵循我的简单教程如何实现拉刷新的RecyclerView在Android。

要导入的库

implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'androidx.gridlayout:gridlayout:1.0.0'

XML代码

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

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

活动JAVA代码

import androidx.appcompat.app.AppCompatActivity;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
import android.os.Bundle;
import android.os.Handler;

public class MainActivity extends AppCompatActivity {

private SwipeRefreshLayout swipeRefreshLayout;

...

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
        ...
        swipeRefreshLayout = findViewById(R.id.swipe_layout);
        initializeRefreshListener();
}

    void initializeRefreshListener() {

        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                // This method gets called when user pull for refresh,
                // You can make your API call here,
                // We are using adding a delay for the moment
                final Handler handler = new Handler();
                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        if(swipeRefreshLayout.isRefreshing()) {
                            swipeRefreshLayout.setRefreshing(false);
                        }
                    }
                }, 3000);
            }
        });
    }

注意，在Android和WP上实现时，有一些UX问题需要解决。

“为什么设计师/开发者不应该像iOS应用那样执行拉式刷新，一个很好的指标是谷歌及其团队在Android上从未使用过拉式刷新，而他们却在iOS上使用它。”

https://plus.google.com/109453683460749241197/posts/eqYxXR8L4eb

没有人提到新的类型的“拉刷新”，显示在操作栏的顶部，就像谷歌Now或Gmail应用程序。

有一个ActionBar-PullToRefresh库，它的工作原理完全相同。

要获得最新的棒棒糖拉刷新:

下载最新的棒棒糖SDK和Extras/Android支持库 将项目的构建目标设置为Android 5.0(否则支持包可能会与资源有错误) 更新libs/android-support-v4.jar到21版 使用android.support.v4.widget。swiperfreshlayout + android.support.v4.widget. swiperfreshlayout . onrefreshlistener

详细的指南可以在这里找到:http://antonioleiva.com/swiperefreshlayout/

加上ListView，我建议阅读评论中的canChildScrollUp();)

最后，谷歌发布了一个官方版本的拉取刷新库!

它被称为swiperfreshlayout，在支持库中，文档在这里:

Add SwipeRefreshLayout as a parent of view which will be treated as a pull to refresh the layout. (I took ListView as an example, it can be any View like LinearLayout, ScrollView etc.) <androidx.swiperefreshlayout.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/pullToRefresh" android:layout_width="match_parent" android:layout_height="match_parent"> <ListView android:id="@+id/listView" android:layout_width="match_parent" android:layout_height="match_parent"/> </androidx.swiperefreshlayout.widget.SwipeRefreshLayout> Add a listener to your class protected void onCreate(Bundle savedInstanceState) { final SwipeRefreshLayout pullToRefresh = findViewById(R.id.pullToRefresh); pullToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { refreshData(); // your code pullToRefresh.setRefreshing(false); } }); }

你也可以调用pullToRefresh.setRefreshing(true/false);按您的要求。

更新

Android支持库已弃用，并已被AndroidX所取代。新库的链接可以在这里找到。

此外，你需要添加以下依赖到你的项目:

implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'

OR

你可以去Refactor>>Migrate to AndroidX, Android Studio会为你处理依赖项。

如果你想在webview或其他地方使用pull来刷新，然后简单地复制粘贴这段代码到你的项目中，它工作得很好。

XML源代码:

   <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/swiperefresh"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <WebView
        android:id="@+id/WebView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true">
    </WebView>
    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

JAVA代码:

  final SwipeRefreshLayout pullToRefresh = findViewById(R.id.swiperefresh);
    pullToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh()
        {
          Toast.makeText(WebBrowser.this,"pull to refresh",Toast.LENGTH_LONG).show();
            mwebView.loadUrl(mainUrl);
            pullToRefresh.setRefreshing(false);//if false then refresh progress dialog will disappear when page loading finish, but if it is true then always the refresh load dialog show even after the page load or not
        }
    });

构建。Gradle源代码:

 implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'