这里是xml布局文件

<FrameLayout 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/swipe_container"  
        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.support.v4.widget.SwipeRefreshLayout>  
  
</FrameLayout>

现在创建color.xml文件，用来展示进度条颜色

<?xml version="1.0" encoding="utf-8"?>
<resources>
    
    <!-- A light Holo shade of blue -->  
    <color name="holo_blue_light">#ff33b5e5</color>  
    <!-- A light Holo shade of green -->  
    <color name="holo_green_light">#ff99cc00</color>  
    <!-- A light Holo shade of red -->  
    <color name="holo_red_light">#ffff4444</color>  
    <!-- A dark Holo shade of blue -->  
    <color name="holo_blue_dark">#ff0099cc</color>  
    <!-- A dark Holo shade of green -->  
    <color name="holo_green_dark">#ff669900</color>  
    <!-- A dark Holo shade of red -->  
    <color name="holo_red_dark">#ffcc0000</color>  
    <!-- A Holo shade of purple -->  
    <color name="holo_purple">#ffaa66cc</color>  
    <!-- A light Holo shade of orange -->  
    <color name="holo_orange_light">#ffffbb33</color>  
    <!-- A dark Holo shade of orange -->  
    <color name="holo_orange_dark">#ffff8800</color>  
    <!-- A really bright Holo shade of blue -->  
    <color name="holo_blue_bright">#ff00ddff</color> 
</resources>

最后，是我们MainActivity中的示例

package com.example.webviewrefresh;

import android.os.Bundle;
import android.app.Activity;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener;
import android.view.Menu;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {

    private SwipeRefreshLayout swipeLayout;
	private WebView webview;

	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        webview = (WebView) findViewById(R.id.webview);
       swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_container);
       swipeLayout.setOnRefreshListener(new OnRefreshListener() {
		
		@Override
		public void onRefresh() {
			// TODO Auto-generated method stub
			webview.loadUrl(webview.getUrl());
		}
	});
        
       swipeLayout.setColorScheme(R.color.holo_blue_bright,  
               R.color.holo_green_light, R.color.holo_orange_light,  
               R.color.holo_red_light);   
        
       webview.loadUrl("https://www.baidu.com/");  
        
       webview.getSettings().setJavaScriptEnabled(true);   
       
       webview.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);  
       
       webview.requestFocus();  
       
       webview.setWebViewClient(new WebViewClient(){  
           @Override  
           public boolean shouldOverrideUrlLoading(WebView view, String url) {  
               view.loadUrl(url);         
               return true;         
           }  
       });  
       //设置进度条  
       webview.setWebChromeClient(new WebChromeClient(){  
           @Override  
           public void onProgressChanged(WebView view, int newProgress) {  
               if (newProgress == 100) {  
                  
                   swipeLayout.setRefreshing(false);  
               } else {  
                   if (!swipeLayout.isRefreshing())  
                       swipeLayout.setRefreshing(true);  
               }  
                 
               super.onProgressChanged(view, newProgress);  
           }  
       });  
        
    }


  
}

好了，接下里你可以试一试了，希望有所帮助

最近项目中需要用到WebView下拉刷新的功能，经过查找资料终于完成了此功能，现在拿出来和大家分享一下。希望对大家有所帮助。

效果如下图：

代码：

activity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.zq.pullrefreshwebview.MainActivity">
    <com.zq.pullrefreshwebview.widget.PtrClassicFrameLayout
        android:id="@+id/rotate_header_web_view_frame"
        xmlns:cube_ptr="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        cube_ptr:ptr_duration_to_close="200"
        cube_ptr:ptr_duration_to_close_header="1000"
        cube_ptr:ptr_keep_header_when_refresh="true"
        cube_ptr:ptr_pull_to_fresh="false"
        cube_ptr:ptr_ratio_of_header_height_to_refresh="1.2"
        cube_ptr:ptr_resistance="1.8">
        <WebView
            android:id="@+id/webview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />
    </com.zq.pullrefreshwebview.widget.PtrClassicFrameLayout>
</RelativeLayout>

 Activity.Java

/****
 * WebView 实现下拉加载
 */
public class MainActivity extends AppCompatActivity {

    private PtrClassicFrameLayout mPtrFrame;
    private WebView mWebView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mWebView= (WebView) findViewById(R.id.webview);
        mPtrFrame= (PtrClassicFrameLayout) findViewById(R.id.rotate_header_web_view_frame);
        initView();
    }

    private void initView(){
        mWebView.setWebViewClient(new WebViewClient() {

            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                if(url.toLowerCase().startsWith("http://") || url.toLowerCase().startsWith("https://"))
                {
                    return false;
                }
                return true;
            }
            @Override
            public void onPageFinished(WebView view, String url) {
                mPtrFrame.refreshComplete();
            }

        });
        mPtrFrame.setLastUpdateTimeRelateObject(this);
        mPtrFrame.setPtrHandler(new PtrHandler() {
            @Override
            public boolean checkCanDoRefresh(PtrFrameLayout frame, View content, View header) {
                return PtrDefaultHandler.checkContentCanBePulledDown(frame, mWebView, header);
            }
            @Override
            public void onRefreshBegin(PtrFrameLayout frame) {
                updateData();
            }
        });
        mPtrFrame.setResistance(1.7f);
        mPtrFrame.setRatioOfHeaderHeightToRefresh(1.2f);
        mPtrFrame.setDurationToClose(200);
        mPtrFrame.setDurationToCloseHeader(1000);
        mPtrFrame.setPullToRefresh(false);
        mPtrFrame.setKeepHeaderWhenRefresh(true);
        mPtrFrame.postDelayed(new Runnable() {
            @Override
            public void run() {
                mPtrFrame.autoRefresh();
            }
        }, 100);
    }
    private void updateData() {
        mWebView.loadUrl("https://my.oschina.net/zhangqie/blog");
    }

}

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

注：上图效果是参考他人写的

更多控件实现下拉刷新效果图：  可以参考 https://github.com/DickyQie/android-advanced-effect/tree/pull-down-refresh   我就是参考此案例来实现的

更多实现方式 https://github.com/liaohuqiu/android-Ultra-Pull-To-Refresh

 图1：

源码点击下载

 图2：

https://github.com/DickyQie/android-advanced-effect/tree/webview-pull-refresh