Android?? WebView? ???? CSS? ????? ??
?? ?? ???? ????? ?? CSS? ???? ??? ??? ???? ? ????. ? ????? Android ??? ??? ??? ????? CSS? ???? ??? ?? ?????.
?? ??
??? www? ???? ???? ????. .google.com? ????? ?????. ?? ??? ?? style.css?? ???? CSS? ????? ????? ??? ???? ????.
??? ??
??? ?? ???:
String html = "<html><head><style> src: url('file:///android_asset/style.css')</style></head></html>";
webView.loadData(html, "text/html", "utf-8");
webView.loadUrl("https://www.google.com");
??? ???
CSS? ????? ?? ??? ? ????. ??? JavaScript? ???? ???? DOM? ??? ? ????. ??? ??? ??? ????.
// MainActivity.java
...
// Enable Javascript
webView.getSettings().setJavaScriptEnabled(true);
// Add a WebViewClient
webView.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
// Inject CSS when page is done loading
injectCSS();
super.onPageFinished(view, url);
}
});
...
// Inject CSS method: read style.css from assets folder
// Append stylesheet to document head
private void injectCSS() {
try {
InputStream inputStream = getAssets().open("style.css");
byte[] buffer = new byte[inputStream.available()];
inputStream.read(buffer);
inputStream.close();
String encoded = Base64.encodeToString(buffer, Base64.NO_WRAP);
webView.loadUrl("javascript:(function() {" +
"var parent = document.getElementsByTagName('head').item(0);" +
"var style = document.createElement('style');" +
"style.type = 'text/css';" +
// Tell the browser to BASE64-decode the string into your script !!!
"style.innerHTML = window.atob('" + encoded + "');" +
"parent.appendChild(style)" +
"})()");
} catch (Exception e) {
e.printStackTrace();
}
}
? ??? CSS? ????? ???? ?? ??? ??? ??? ??? ???? WebViewClient? ?????. injectCSS() ???? ?? ???? CSS ??? ?? Base64? ???? ?? JavaScript? ???? ????? ?? ??? ?????? ?????.
? ??? Android? WebView? ??? ????? ??? ?? CSS? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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