在webview上添加pull to refresh以进行刷新

时间：2016-06-12 14:12:51

标签： java android android-studio webview pull-to-refresh

我将在我的webview上添加pull to refresh，以便刷新我的webview。我已经在这个页面上看到了所有问题，但我找不到添加拉动刷新的好方法......

Mainactivity.java 

package com.vvhvb.hesselfeenstra.vvheerenveenseboys;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String url ="http://heerenveenseboys.nl/";
        WebView view=(WebView) this.findViewById(R.id.webView);
        view.getSettings().setJavaScriptEnabled(true);
        view.getSettings().setBuiltInZoomControls(true);
        view.getSettings().setDisplayZoomControls(false);
        view.setWebViewClient(new WebViewClient());
        view.loadUrl(url);

    }

}

content_main.xml 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.vvhvb.hesselfeenstra.vvheerenveenseboys.MainActivity"
    tools:showIn="@layout/activity_main">

    <WebView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/webView"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>

我希望有人能帮助我并为我解决这个问题。

6 个答案:

答案 0 :(得分：23)

您可以像这样

在Swipe refesh布局中包装webview 
package com.vvhvb.hesselfeenstra.vvheerenveenseboys;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends AppCompatActivity {
WebView view;
SwipeRefreshLayout mySwipeRefreshLayout;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mySwipeRefreshLayout = (SwipeRefreshLayout)this.findViewById(R.id.swipeContainer);
    String url ="http://heerenveenseboys.nl/";
    view=(WebView) this.findViewById(R.id.webView);
    view.getSettings().setJavaScriptEnabled(true);
    view.getSettings().setBuiltInZoomControls(true);
    view.getSettings().setDisplayZoomControls(false);
    view.setWebViewClient(new WebViewClient());
    view.loadUrl(url);

    mySwipeRefreshLayout.setOnRefreshListener(
    new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        view.reload();
    }
    }
    );

}

}

在java中

Class

答案 1 :(得分：8)

我认为最好的解决方案是使用SwipeRefreshLayout，但NestedScrollView中没有ViewTreeObserver.OnScrollChangedListener，因为这可能存在问题：jitinsharma。但还有另一个解决方案webview height grows indefinitely inside a nestedScrollView描述的滚动问题，以实现<android.support.v4.widget.SwipeRefreshLayout android:id="@+id/swipeContainer" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior"> <RelativeLayout android:id="@+id/nonVideoLayout" android:layout_width="match_parent" android:layout_height="match_parent" android:windowSoftInputMode="adjustResize"> <WebView android:id="@+id/main_web_view" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="5dp" android:windowSoftInputMode="adjustResize" app:layout_constraintDimensionRatio="1" /> </RelativeLayout> </android.support.v4.widget.SwipeRefreshLayout> 。所以工作解决方案应该是这样的：

private WebView mWebView;
private SwipeRefreshLayout mySwipeRefreshLayout;
private ViewTreeObserver.OnScrollChangedListener mOnScrollChangedListener;

活动参数：

onCreate

活动mWebView = (WebView) findViewById(R.id.main_web_view); mySwipeRefreshLayout = (SwipeRefreshLayout)this.findViewById(R.id.swipeContainer); mySwipeRefreshLayout.setOnRefreshListener( new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { mWebView.reload(); } } ); ：

implements AdvancedWebView.Listener

和活动的实现：onStop

活动mySwipeRefreshLayout.getViewTreeObserver().removeOnScrollChangedListener(mOnScrollChangedListener); ：

onStart

和活动 mySwipeRefreshLayout.getViewTreeObserver().addOnScrollChangedListener(mOnScrollChangedListener = new ViewTreeObserver.OnScrollChangedListener() { @Override public void onScrollChanged() { if (mWebView.getScrollY() == 0) mySwipeRefreshLayout.setEnabled(true); else mySwipeRefreshLayout.setEnabled(false); } }); ：

{{1}}

答案 2 :(得分：1)

https://developer.android.com/training/swipe/add-swipe-interface.html

您可以使用“滑动到刷新布局”，它易于使用，并为您处理刷新动画。

您可以添加OnRefreshListener来刷新您的webview

答案 3 :(得分：0)

如果您只想拉动刷新

，请尝试此操作 
    ll = (LinearLayout)findViewById(R.id.CategorySelect_lLayout_noID);
ll.setOnTouchListener(new OnTouchListener() {

    public boolean onTouch(View v, MotionEvent event) {

        if(event.getAction() == MotionEvent.ACTION_DOWN){
            Toast.makeText(CategorySelect.this, "action DOWN called", Toast.LENGTH_SHORT).show();
            return true;
        } 

        return false;
    }
});
    return true;
}

或者，如果你想要一个图标或类似铬的东西

https://github.com/liaohuqiu/android-Ultra-Pull-To-Refresh

答案 4 :(得分：0)

这应该完美！在布局文件中，将webview包装在SwipeRefreshLayout中。

<?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"
    >
    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeContainer"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
    >
    <WebView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:id="@+id/webView"
       />
    </android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>

在您的Java文件中，声明SwipeRefreshLayout mySwipeRefreshLayout;  课外。 然后，将其添加到onCreate()方法

    mySwipeRefreshLayout = (SwipeRefreshLayout)this.findViewById(R.id.swipeContainer);

        mySwipeRefreshLayout.setOnRefreshListener(
                        new SwipeRefreshLayout.OnRefreshListener() {
                            @Override
                            public void onRefresh() {
                                    mWebview.reload();
        mWebview.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);
// This is important as it forces webview to load from the instead of reloading from cache

        mWebview .loadUrl(getString(R.string.app_link));

                            }
                        }
                );

答案 5 :(得分：0)

activity_main.xml 

<android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeContainer"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">
<WebView
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="0dp"
        android:layout_marginLeft="0dp"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="0dp"
        android:layout_marginRight="0dp"
        android:layout_marginBottom="0dp"
        app:layout_constraintBottom_toBottomOf="parent"/>
</android.support.v4.widget.SwipeRefreshLayout>

对于Kotllin：

MainActivity.kt 

var mySwipeRefreshLayout: SwipeRefreshLayout? = null
var myWebView: WebView? = null
mySwipeRefreshLayout = findViewById<SwipeRefreshLayout>(R.id.swipeContainer)

    mySwipeRefreshLayout?.setOnRefreshListener {
        Log.i("on refresh", "onRefresh called from SwipeRefreshLayout")

        // This method performs the actual data-refresh operation.
        // The method calls setRefreshing(false) when it's finished.
        myWebView?.reload();
    }
myWebView!!.webViewClient = object : WebViewClient() {
        override fun shouldOverrideUrlLoading(view: WebView?, url: String?): Boolean {
            view?.loadUrl("http://www.google.com")
            return false;
        }

        override fun onPageFinished(view: WebView?, url: String?) {
            mySwipeRefreshLayout?.isRefreshing = false
        }
    }
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