WebView和shouldOverrideUrlLoading

Question

My code:

    public class View_WebView extends Activity  {
    WebView myWebView;

    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            if (url.endsWith(".mp4")){
            Intent in = new Intent (Intent.ACTION_VIEW , Uri.parse(url));
            startActivity(in);
            return true;
        }
        else
            return false;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        myWebView = (WebView) findViewById(R.id.webview);
        myWebView.setWebViewClient(new WebViewClient());      
        myWebView.loadUrl("http://hdcast.pl");
    }     

}


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

Eclipse compiles correctly, when I launch my application on my smartphone I got an error:

"Unfortunately, the application XX has been stopped"

Answer 1

Your webView is null, uncomment this line:

myWebView = (WebView) findViewById(R.id.webview);

Edit:

You also must have a WebView element in your XML

 <WebView  xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/webview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
 />

Answer 2

You are not using it correctly!

You have to make your own custom WebClient that will extend the WebClient and inside there make use of shouldOverrideUrlLoading under your needs.

http://developer.android.com/guide/webapps/webview.html

private class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        if (url.endsWith(".mp4")){
        Intent in = new Intent (Intent.ACTION_VIEW , Uri.parse(url));
        startActivity(in);
        return true;
    }
    else
        return false;
    }
}

Then you add your custom WebClient to your WebView and you are good to go.

myWebView.setWebViewClient(new MyWebViewClient());      
myWebView.loadUrl("XXX");

EDIT:As per the previous answer though, make sure that you are initializing your WebView with findViewById()

Answer 3

Do it directly :

From this tutorial

myWebView.setWebViewClient(new WebViewClient() {  
@Override  
public boolean shouldOverrideUrlLoading(WebView view, String url) {  
 if (url.endsWith(".mp4")){
    Intent in = new Intent (Intent.ACTION_VIEW , Uri.parse(url));
    startActivity(in);
    return true;
}
else
    return false;
}