Java progressbar未在webview的Relativelayout中显示

Java progressbar未在webview的Relativelayout中显示,java,android,webview,android-progressbar,Java,Android,Webview,Android Progressbar,我正在开发一个包含webview的应用程序。我将RelativeLayout作为xml文件的根元素。RelativeLayout包含ProgressBar、SwipeRefreshLayout、WebView和AdView元素。默认情况下,ProgressBar的可见性设置为gone,它应该在加载网页时出现,并且再次不可见。但是,它不会在任何时候出现。这是我的activity\u web\u view.xml <?xml version="1.0" encoding="utf-8"?>

我正在开发一个包含webview的应用程序。我将
RelativeLayout
作为xml文件的根元素。
RelativeLayout
包含
ProgressBar
SwipeRefreshLayout
WebView
AdView
元素。默认情况下,
ProgressBar
的可见性设置为
gone
,它应该在加载网页时出现,并且再次不可见。但是,它不会在任何时候出现。这是我的
activity\u web\u view.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"
    tools:context="net.softglobe.allmedia.Showsite"
    android:orientation="vertical">

<ProgressBar
    android:id="@+id/pb"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:progressDrawable="@drawable/progressbar_states"
    style="@style/Widget.AppCompat.ProgressBar.Horizontal"
    android:visibility="gone"/>


<android.support.v4.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:configChanges="orientation|screenSize"/>

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

        <com.google.android.gms.ads.AdView
            xmlns:ads="http://schemas.android.com/apk/res-auto"
            android:id="@+id/adView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            ads:adSize="SMART_BANNER"
            android:layout_alignBottom="@id/swiperefresh"
            ads:adUnitId="ca-app-pub-3940256099942544/6300978111">
        </com.google.android.gms.ads.AdView>
请帮我解决这个问题。我想要
ProgressBar
AdView
。 我正在使用
onCreate
方法,使
Siteview.java
文件中的
ProgressBar
可见。下面是代码

 final SwipeRefreshLayout finalMySwipeRefreshLayout1 = mySwipeRefreshLayout;
    myWebView.setWebViewClient(new WebViewClient() {

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {

            // TODO Auto-generated method stub
            super.onPageStarted(view, url, favicon);
            // Visible the progressbar
            mProgressBar.setVisibility(View.VISIBLE);
        }
        @Override
        public void onPageFinished(WebView view, String url) {
            finalMySwipeRefreshLayout1.setRefreshing(false);
        }
    });

按如下方式重写这两个函数

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    tools:context="net.softglobe.allmedia.Showsite"
    android:orientation="vertical"
    android:weightSum="20">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:orientation="horizontal" >

<ProgressBar
    android:id="@+id/pb"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:progressDrawable="@drawable/progressbar_states"
    style="@style/Widget.AppCompat.ProgressBar.Horizontal"
    android:visibility="gone"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="18"
        android:orientation="horizontal" >

<android.support.v4.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:configChanges="orientation|screenSize"/>

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

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="2" >

<com.google.android.gms.ads.AdView
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:id="@+id/adView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    ads:adSize="SMART_BANNER"
    android:layout_alignBottom="@id/swiperefresh"
    ads:adUnitId="ca-app-pub-3940256099942544/6300978111">
</com.google.android.gms.ads.AdView>
</LinearLayout>
 @Override
            public void onPageStarted(String url, Bitmap favicon) {
                pb.setVisibility(View.VISIBLE);

            }

            @Override
            public void onPageFinished(String url) {
                pb.setVisibility(View.GONE);

            }

您的SwiperFreshLayout位于ProgressBar的顶部,因此即使您使ProgressBar可见,它也会显示在SwiperFreshLayout下,您将无法看到它,您也可以使用

 `android:layout_below="@+id/pb"`

在SwipeRefreshLayout中,或者,当进度条可见时,您可以将SwipeRefreshLayout可见性设置为“消失”,当进度条不可见时,您可以将SwipeRefreshLayout设置为“可见”。

将代码粘贴到您试图看到进度的位置bar@vikassingh我已经添加了代码snippet@AnisurRahmanTonu不走运,请尝试删除这一行super.onPageStarted(视图、url、favicon);通过在
SwipeRefreshLayout