[Q] How replace css from Webview - Android Q&A, Help & Troubleshooting

I want automatically replace css file when onpagefinished. Manually replace css with javascript i dont want, because my css file have over 2000 lines. I simply want set css to Webview.
Code:
......
final Activity activity = this;
wv.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress)
{
activity.setTitle(" "+LASTURL);
activity.setProgress(progress * 100);
if(progress == 100)
activity.setTitle(" "+LASTURL);
}
});
wv.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Toast.makeText(getApplicationContext(), "Error: " + description+ " " + failingUrl, Toast.LENGTH_LONG).show();
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
if (url.indexOf("...")<=0) {
// the link is not for a page on my site, so launch another Activity that handles URLs
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(intent);
return true;
}
return false;
}
public void onPageStarted (WebView view, String url, Bitmap favicon) {
LASTURL = url;
}
public void onPageFinished (WebView view, String url) {
}
});
wv.loadUrl("...");
}
}