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android webview displaying blank page

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借酒劲吻你
借酒劲吻你 2020-12-14 06:33

I have an android application that I am developing using the emulator running on android 2.3.3 with an embedded WebView in a framelayout nested in a linearlayout (vertical).

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  • 不要未来只要你来
    2020-12-14 06:52

    In my case, it was due to the fact that my webview was attempting to load a page using HTTPS where the certificate was untrusted.

    You can check if this is the case in your code using the following snippet:

    @Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
    handler.proceed();
}

    Java

    override fun onReceivedSslError(view: WebView?, handler: SslErrorHandler?, error: SslError?) {
    handler?.proceed()
}

    Kotlin

    Then, if it is the case, quickly remove the snippet and refer to the documentation to diagnose the problem further and potentially add the certificate to your keystore.

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  • 故里飘歌
    2020-12-14 06:53

    If it still Doesn't work then please try adding "http://" or "https://" before the web address and it should work.

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  • 栀梦
    2020-12-14 06:57 
    WebSettings settings = wbView.getSettings();
settings.setDomStorageEnabled(true);
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  • 滥情空心
    2020-12-14 06:57

    My webview was displaying a white blank square on top of it, sometimes totally blank. This only occurred when it was loading certain data.

    Changing it to a RelativeLayout, and setting layout_height to match_parent worked for me.

    <RelativeLayout xmlns:android=...
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
        android:id="@+id/ll_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginTop="3dp"
        android:gravity="center_vertical"
        android:orientation="horizontal">

        .....

    </RelativeLayout>

    <WebView
        android:id="@+id/web_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/ll_title"
        android:background="@color/colorYellow" />


    <ProgressBar
        android:id="@+id/pb_spinning"
        style="?android:attr/progressBarStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:visibility="gone" />

</RelativeLayout>
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  • 遥遥无期
    2020-12-14 06:59

    It might be a bit too late, but I wanted to share my experience with you, because I had the same problem and spent a lot of time on it.

    Put your WebView in RelativeLayout and not in FrameLayout.

    What I have tested: My WebView's onPageFinished() was called every time, but on the screen I got blank page.

    From chrome://inspect WebView debugger I was able to "ping" my WebView by pressing inspect button, and after that WebView was refreshing immediately.

    My thoughts - WebView isn't rendered correctly in FrameLayout, and RelativeLayout fixes the issue (even invalidate() and requestLayout() calls didn't help).

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  • [愿得一人]
    2020-12-14 06:59

    instead of passing null, you should pass an empty String to it. ex: ""
    So you should call it like this:
    wview.loadDataWithBaseURL("", "<HTML><BODY><H3>Test</H3></BODY></HTML>","text/html","utf-8","");

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