これを試して :
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
//Check whether url contains email or not.
// To start Email Intent
String[] mailto = { "example.com" };
// Create a new Intent to send messages
Intent sendIntent = new Intent(Intent.ACTION_SEND);
// Add attributes to the intent
sendIntent.putExtra(Intent.EXTRA_EMAIL, mailto);
sendIntent.putExtra(Intent.EXTRA_SUBJECT, "This is sample document.");
sendIntent.setType("message/rfc822");
startActivity(sendIntent);
return true;
}
お役に立てれば。