Enabling general JavaScript in WebViewClient
While searching for an answer in google, it seems that I'm not the only one stuck with a problem that seems impossible to solve.
I've managed to create a WebView with a custom WebViewClient - this makes it possible for me to have a processdialog and show an error message if an URL couldn't be loaded.
But this creates a problem with JavaScript. The URL I'm loading has some JavaScript which changes some HTML elements CSS styles (showing or hiding element) or redirects to another location onclick - or maybe even want's to show an alert box. But by using the WebViewClient none of those are working.
This is how I load a page:
public void loadUrl(String url)
{
final ProgressDialog dialog = ProgressDialog.show(myActivity.this, "", getString(R.string.loading), true);
final WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.setVerticalScrollBarEnabled(false);
myWebView.setHorizontalScrollBarEnabled(false);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.setWebViewClient(new WebViewClient()
{
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url)
{
Toast.makeText(myActivity.this, url, Toast.LENGTH_SHORT).show(); //Debugging purposes
if (url.endsWith(".mp4"))
{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "video/mp4");
view.getContext().startActivity(intent);
}
else
{
view.loadUrl(url);
}
return true;
}
public void onPageFinished(WebView view, String url)
{
//Toast.makeText(myActivity.this, "Oh no!", Toast.LENGTH_SHORT).show();
dialog.dismiss();
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
{
Toast.makeText(myActivity.this, description, Toast.LENGTH_SHORT).show();
String summary = "<html><body><strong>" + getString(R.string.lost_connection) + "</body></html>";
myWebView.loadData(summary, "text/html", "utf-8");
}
}); //End WebViewClient
myWebView.loadUrl(url);
}
This could probably be done in a smarter way, but I'm new at both Java and Android development...
Is it possible for me to enable the JavaScript for the WebViewClient at all? Removing the WebViewClient solves the problem, but then I can't catch events when the page errors or is finished loading.
Answer
I don't know what your exact problem is, but i can enable the JavaScript and a custom WebViewclient without any problem:
WebView vistaWeb = (WebView) findViewById(R.id.webview);
vistaWeb.setWebChromeClient(new MyCustomChromeClient(this));
vistaWeb.setWebViewClient(new MyCustomWebViewClient(this));
vistaWeb.clearCache(true);
vistaWeb.clearHistory();
vistaWeb.getSettings().setJavaScriptEnabled(true);
vistaWeb.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);