Android Webview NullPointerException

Question

What are possible error when I encountered the NullPointerException for Webview:

WebView webView;
webView = (WebView) findViewById(R.id.webView3);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("...");

This is my webview3.xml:

<?xml version="1.0" encoding="utf-8"?>
<WebView  xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/webView3"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
/>

NPE is on line webView.getSettings().setJavaScriptEnabled(true);

Where exactly do you get a null pointer exception?

Shade
– Shade

2013-03-18 12:16:21 +00:00
Commented Mar 18, 2013 at 12:16 — Shade
– Shade, Commented Mar 18, 2013 at 12:16
at which line do you get NPE

Abhishek Nandi
– Abhishek Nandi

2013-03-18 12:16:29 +00:00
Commented Mar 18, 2013 at 12:16 — Abhishek Nandi
– Abhishek Nandi, Commented Mar 18, 2013 at 12:16
on line webView.getSettings().setJavaScriptEnabled(true);

JR Galia
– JR Galia

2013-03-18 12:21:58 +00:00
Commented Mar 18, 2013 at 12:21 — JR Galia
– JR Galia, Commented Mar 18, 2013 at 12:21

Srikanth · Accepted Answer · 2013-03-18 12:16:16Z

3

May be missing to load the xml layout webview3.xml ie. setContentView(R.layout.webview3.xml);

answered Mar 18, 2013 at 12:16

Srikanth

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Comments

Paul Roub · Accepted Answer · 2014-08-02 22:29:43Z

Try this sample code,

res/layout/webview3.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
           android:orientation="vertical" 
           android:layout_width="fill_parent" 
           android:layout_height="fill_parent"> 

      <WebView
              android:id="@+id/webview" 
              android:layout_width="fill_parent" 
              android:layout_height="fill_parent"/>

</LinearLayout>

set permission in AndroidManifest.xml file

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

And use this code in your onCreate() method.

setContentView(R.layout.webview3.xml);
WebView mywebview = (WebView) findViewById(R.id.webview);
mywebview.loadUrl("http://Enter your URL here");
WebSettings webSettings = mywebview.getSettings();
webSettings.setJavaScriptEnabled(true);

John Moses · Accepted Answer · 2013-06-28 21:55:36Z

0

Another way:

    View webViewLayout = ((LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE))
            .inflate(R.layout.web_main, null, false);
    WebView webView = (WebView) webViewLayout.findViewById(R.id.webview);

answered Jun 28, 2013 at 21:55

John Moses

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