Sample code of WebResourceResponse to load WebView resources from local assets!

WebResourceResponse.java

@Override
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
    String resourceUrl = request.getUrl().toString();
    String fileExtension = WebviewResourceMappingHelper.getInstance().getFileExt(resourceUrl);
    if(WebviewResourceMappingHelper.getInstance().getOverridableExtensions().contains(fileExtension)){
        String encoding = "UTF-8";
        String assetName = WebviewResourceMappingHelper.getInstance().getLocalAssetPath(resourceUrl);
        if (StringUtils.isNotEmpty(assetName)) {
            String mimeType = WebviewResourceMappingHelper.getInstance().getMimeType(fileExtension);
            if (StringUtils.isNotEmpty(mimeType)) {
                try {
                    Log.e(TAG, assetName);
                    return WebviewResourceMappingHelper.getWebResourceResponseFromAsset(assetName, mimeType, encoding);
                } catch (IOException e) {
                    return super.shouldInterceptRequest(view, request);
                }
            }
        }
        String localFilePath = WebviewResourceMappingHelper.getInstance().getLocalFilePath(resourceUrl);
        if (StringUtils.isNotEmpty(localFilePath)) {
            String mimeType = WebviewResourceMappingHelper.getInstance().getMimeType(fileExtension);
            if(StringUtils.isNotEmpty(mimeType)){
                try {
                    Log.e(TAG, localFilePath);
                    return WebviewResourceMappingHelper.getWebResourceResponseFromFile(localFilePath, mimeType, encoding);
                } catch (FileNotFoundException e) {
                    return super.shouldInterceptRequest(view,request);
                }
            }
        }
    }
    if (fileExtension.endsWith("jpg")) {
        try {
            InputStream inputStream = ImageUtils.readFromCacheSync(resourceUrl);
            if (inputStream != null) {
                return new WebResourceResponse("image/jpg", "UTF-8", inputStream);
            }
        } catch (Exception e) {
            return super.shouldInterceptRequest(view,request);
        }
    }
    return super.shouldInterceptRequest(view,request);
}