WebView with custom HTML and local images in android?

For the webview to find the image, you need to place it into the directory /assets/ (you probably need to create this directory).

public void loadHTML() {
    final String mimeType = "text/html";
    final String encoding = "utf-8";
    final String html = "<h1>Header</h1><p>Custom HTML</p><p><img src=\\"file:///android_asset/image1.jpg\\" /></p>";
    
    WebView wv = (WebView) findViewById(R.id.wv1);
    wv.loadDataWithBaseURL("fake://not/needed", html, mimeType, encoding, "");
}