Adding pull to refresh on webview for refreshing

I will add pull to refresh on my webview so it refresh my webview. i have seen all questions on this page but i can't find the good way to add pull to refresh...

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>

I hope anyone can help me and solve this problem for me.

You could wrap webview in Swipe refesh layout like this

<?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">

<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">

<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

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

In 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 {
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();
    }
    }
    );

}

}

I think the best solution is to use SwipeRefreshLayout but without NestedScrollView inside it as jitinsharma described, beacause this possible problem : webview height grows indefinitely inside a nestedScrollView.But there is another solution for scrolling problem as described by vizZ,to implement ViewTreeObserver.OnScrollChangedListener.So working solution shold be something like this:

<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>

Activity parameters:

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

on Activity onCreate:

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();
                    }
                }
        );

and implements of activity:implements AdvancedWebView.Listener

on Activity onStop :

mySwipeRefreshLayout.getViewTreeObserver().removeOnScrollChangedListener(mOnScrollChangedListener);

and Activity onStart:

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

                    }
                });

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

You can use the Swipe-to-Refresh Layout, it is easy to use and takes care of the refresh animation for you.

You can add an OnRefreshListener to refresh your webview

Try This if you want to just pull to refresh

    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;
}

Or if you want an icon or something like chrome

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

This should work perfectly! In your layout file, wrap the webview in a SwipeRefreshLayout.

<?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>

In your Java file, declare SwipeRefreshLayout mySwipeRefreshLayout; outside the class. Then, add this to the onCreate() method

    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));

                            }
                        }
                );

来源：https://stackoverflow.com/questions/37775213/adding-pull-to-refresh-on-webview-for-refreshing

标签

java

android

android-studio

webview

pull-to-refresh