Loading an image stored in assets folder in Webview with static html page in Android

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        WebView wv = (WebView) findViewById(R.id.webView1);
        final String mimeType = "text/html";
        final String encoding = "utf-8";
        final String html = "<h1>Header</h1>" +
        "<p>Custom HTML</p>" +
        "<p> <img height=42 width=42 src = file:///android_asset/ic_launcher.png></img></p>";
        wv.loadDataWithBaseURL("fake://not/needed", html, mimeType, encoding, "");
       
    } 
     
    }

And the XML file is


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/textView1"
        android:layout_alignLeft="@+id/button1"
         />

</RelativeLayout>