I am creating an AppDrawer (all in one place to launch shortcuts).
My JSCallBack bridge class has a method that should delete a shortcut, then refresh the page. But, it is unable to successfully refresh the page.
AppDrawerMain.java
public class AppDrawerMain extends Application {
#Override
public void start(Stage stage) throws IOException {
FXMLLoader fxmlLoader = new FXMLLoader(AppDrawerMain.class.getResource("main.fxml"));
Parent root = (Parent) fxmlLoader.load();
Scene scene = new Scene(root, 1280, 720);
String css = this.getClass().getResource("application.css").toExternalForm();
scene.getStylesheets().add(css);
stage.setTitle("Hello!");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch();
}
}
AppDrawerController.java
public class AppDrawerController implements Initializable {
#FXML
private Button refreshButton;
#FXML
private WebView webView;
WebEngine webEngine;
JSCallBack jsCallBack;
//this function essentially generates the html code for the webview
public String loadApps(){
return "<div class=\"container\"><img src=\"file:/"+imagePath+"\"/><p class=\"title\">"+displayName+"</p><div class=\"overlay\"></div><div class=\"button-open\" onclick=\"app.processOnClickOpen(\'"+id+"\')\"> Open </div><div class=\"button-option\" onclick=\"app.processOnClickOption(\'"+id+"\')\"> Edit </div></div>"
}
//refresh the page
private void refreshPage(String html){
webEngine.loadContent(html);
webEngine.reload();
}
#SneakyThrows
#Override
public void initialize(URL url, ResourceBundle resourceBundle) {
refreshButton.setOnAction(event -> {
refreshPage(loadApps());
});
webEngine = webView.getEngine();
webEngine.getLoadWorker().stateProperty().addListener((obs, oldValue, newValue)-> {
if (newValue == Worker.State.SUCCEEDED) {
JSObject jsObject = (JSObject) webEngine.executeScript("window");
jsCallBack = new JSCallBack(webEngine); //declared this way to avoid GC
jsObject.setMember("app", jsCallBack);
}
});
webEngine.setJavaScriptEnabled(true);
var html = loadApps();
webEngine.loadContent(html);
}
//The bridge class
public class JSCallBack {
protected JSCallBack() {}
//no refresh needed here
public void processOnClickOpen(String id) {
log("Before open");
onAppOpen(id);
log("After open");
}
//The part that isnt working
public void processOnClickOption(String id) {
//deleting the apps works fine
webEngine.loadContent(loadApps()+loadApps()); //trying to refresh the page isnt fine
webEngine.reload();
}
}
}
The problem I am having is here:
public void processOnClickOption(String id) {
//refreshPage(loadApps()+loadApps()) (not working either)
//refreshButton.fire() (not working either)
webEngine.loadContent(loadApps()+loadApps()); //trying to refresh the page isnt fine
webEngine.reload(); //not working
}
I tried adding location.reload() to the JavaScript function in the script itself, but it did not work.
I tried adding the refreshButton.fire() to the processOnClickOption(), which should reload the page if clicked on manually, but it did work either.
I tried to set a new WebEngine in the bridge class itself. Also, it did not work.
I added a log to see if there was an issue with threading, but WebEngine mentions that it was on the JavaFX Application thread, so that is not the problem either.
This is the main WebView:
If I click on the edit button, it should remove it from the WebView and refresh the page like this expected outcome:
Unfortunately, after clicking the edit button it will delete the files on the backend side, but the WebView is not refreshed, so the app stays there. I would like to get help on this.
I have an android activity that holds the webview and I have a page that contains a local variable marks. The local variable will be increased when user got the correct answer. In the webpage, there is a button called exit which is supposed to close the webpage and go back to the activity in android, and it should carry the local variable marks back to the activity too. I want to ask how the exit button can be done in the webpage to close the page and return local variable by using Javascript and how can the activity in android receive the local variable from the webpage.
My activity in android:
private WebView webview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main);
webview = new WebView(this);
webview.getSettings().setJavaScriptEnabled(true);
try {
webview.setWebViewClient(new WebViewClient());
webview.loadUrl("file:///android_asset/index.html");
}
catch(Exception ex)
{
ex.printStackTrace();
}
setContentView(webview);
}
My exit button is a div:
<div class="exit" onclick="finish()">Exit</div>
I am going to use the finish() function to return the variable and close the webpage back to the activity in android.
function finish() {}
To notify the host application that a page has finished loading. Then Call onPageFinished()
webview.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
// do your stuff here
}
});
SOURCE
you can do one thing..On click on the exit call any url like http://../getmark?marks=2 and once url load in the webview finish/ exit from webview. In the activity
webView.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
// parse the url here to get marks
}
});
Register a javascriptinterface to your webview in onCreate:
this.webview.addJavascriptInterface(new MyJSInterface(this), "Android");
Implement setCount method in your Activity:
public void setCount (int count) {
//do what ever you want with count
}
Make a new JavascriptInterface-Class:
public class MyJSInterface {
private YourActivity yourActivity = null;
public MyJSInterface (YourActivity yourActivity) {
this.yourActivity = yourActivity;
}
#JavascriptInterface
public void invoke (int count) {
this.yourActivity.setCount(count);
}
}
And in javascript:
function finish(marks) {
if (Android !== undefined) {
if (Android.invoke !== undefined) {
Android.invoke(marks);
}
}
}
I want to open a webpage in a WebView and click automatically on a button after the page has loaded. This is my current WebView class:
public class WebViewFragment extends Fragment {
...
#Override
public void onResume() {
super.onResume();
openUrl();
}
private void openUrl() {
setCookies();
if (urlToOpen != null) {
//tell webview to handle redirects (by default browser launches on redirects)
webview.setWebViewClient(new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if (getActivity() != null)
((MainActivity) getActivity()).onShowLoading();
}
#Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if (getActivity() != null) {
executeJS();
((MainActivity) getActivity()).onHideLoading();
}
}
});
if (javascriptToExecute != null) {
webview.getSettings().setJavaScriptEnabled(true);
}
webview.loadUrl(urlToOpen);
}
}
private void executeJS() {
System.out.println("executeJS(): " + javascriptToExecute);
webview.loadUrl(javascriptToExecute);
}
}
I can use "javascript:$('#customer-info-edit').click();" or "javascript:document.getElementById('customer-info-edit').click();" both work fine.
But the problem is they work only one time. If I open the WebView for the first time, the button is clicked. However if I press physical back button and open the WebView again then the button is not clicked. Why isn't Javascript working every time?
I don't know what the problem exactly was, but I found a working solution: add 500ms delay before executing javascript.
I have a problem with Javascript in WebView. Currently I have a ViewPager, which adds View dynamically when needed. Before add a view to viewpager, I inflate it and load an embedded webview inside:
LayoutInflater inflater = this.getLayoutInflater();
FrameLayout v = (FrameLayout) inflater.inflate(R.layout.notebook_page, null);
setupWebView(v);
pagerAdapter.addView(v);
pagerAdapter.notifyDataSetChanged();
In the webview, first I load a local html, and then inject a JS fuction to set several input on HTML.
private void setupWebView(View v) {
myWebView = (WebView) v.findViewById(R.id.webview);
myWebView.getSettings().setJavaScriptEnabled(true);
myWebView.loadUrl("file:///android_asset/web_resources/index.html");
myWebView.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
super.onPageFinished(myWebView, url);
Log.d("WebView Content", "Injecting JS");
myWebView.loadUrl("javascript:function('" + input_var + "')");
}
});
}
Funtion setupWebView is called correctly for every view inflated, however, the JS function does not work properly
The same piece of code works perfectly in an Activity, if there is only 1 page. Just in ViewPager, where there are more than 1 pages to display the webviews, JS only loads in the last page.
Do you have any suggestion?
Firstly, on 5.0 Android you should use different method to use javascript. I use this snippet of code.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
webView.evaluateJavascript("javascript:window.HTMLOUT.processHTML('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');", new ValueCallback<String>() {
#Override
public void onReceiveValue(String s) {
Log.e("LoginActivity onReceiveValue", s);
}
});
} else
webView.postUrl("javascript:window.HTMLOUT.processHTML('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');", null);
Also, you should include #JavascriptInterface tag on your javascript method.
#SuppressWarnings("unused")
#JavascriptInterface
public void processHTML(final String html) {
//method called from javascript
}
I'm trying to make an Android version of a relativly simple iOS app that uses a webview, some buttons and then relies on javascript calls to a CMS.
But I'm stuck at a pretty early point of development: The webview doesn't function with javascript.I've read a lot of posts about how to enable JS in an Android webview, but no luck so far.
Below is some of my code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.webview);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setWebChromeClient(new WebChromeClient());
mWebView.setWebViewClient(new HelloWebViewClient()
{
#Override
public void onPageFinished(WebView view, String url)
{
//Calling an init method that tells the website, we're ready
mWebView.loadUrl("javascript:m2Init()");
page1(mWebView);
}
});
mWebView.loadUrl("http://my_url/mobile/iphone//app.php");
}
private class HelloWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
public void page11(View view)
{
mWebView.loadUrl("javascript:m2LoadPage(1)");
}
What am I doing wrong here?
The URL is working perfectly in my iOS app, and in a browser.
But not in my app!
Please tell me it's something obvious...
FIXED!
Spurred on by the error, I found out that I needed to set
setDomStorageEnabled(true)
for the webview settings.
Thanks for your help Stephan :)
In case something with WebView on Android does not work, I always try to make sure I set these crazy flags such as,
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setUseWideViewPort(true);
webSettings.setBuiltInZoomControls(true);
webSettings.setDisplayZoomControls(false);
webSettings.setSupportZoom(true);
webSettings.setDefaultTextEncodingName("utf-8");
I wonder why these are not set by Default, who would expect webpages without javascript content nowadays, and whats the use having javascript enabled when DOM is unavailable unless specified. Hope someone filed this as a bug or improvement/feature-request already and the monkeys are working on it.
and then there is deprecated stuff rotting somewhere, like this:
webView.getSettings().setPluginState(PluginState.ON);
All this for loading webpages inside app.
On iOS, its all so simple - Swift 3.0
private func openURLWithInAppBrowser(urlString:String) {
guard let url = URL(string:urlString) else {
return
}
let sfSafari = SFSafariViewController(url:url)
present(sfSafari, animated: true, completion: nil)
}
Loading javascript in webview
webView.getSettings().setDomStorageEnabled(true);
Mainly, these three lines will be enough to make the Javascipt work in webView...
webSetting.setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient());
webView.setWebViewClient(new WebViewClient());
If it's not working after that also, then add below line also.
webSettings.setDomStorageEnabled(true);
Actually, you need both setJavaScriptEnabled() and setWebChromeClient(new WebChromeClient()) to make the JavaScript work. If you will use only webSetting.setJavaScriptEnabled(true); then it won't work.
Add the following lines of code in your MainActivity.java
It helped me to enable js
webSetting.setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient());
webView.setWebViewClient(new WebViewClient());
do not forget about this permission in AndroidManifest file.
<uses-permission Android:name="Android.permission.INTERNET" />
Did you enable the right internet permission in the manifest? Everything looks fine otherwise. By any chance, have you also tested this code on an actual Android phone? And not just on the emulator?
Here is a good tutorial on a slightly different approach. You may want to try that one to see if it works for you.
This video (http://youtu.be/uVqp1zcMfbE) gave me the hint to make it work.
The key is to save your html and js files in the Android assets/ folder.
Then you can easily access them via:
webView.loadUrl("file:///android_asset/your_page.html");
If you are in Kotlin you can use the following method to get the JavaScript working :
webView.apply {
loadUrl(
"file:///android_asset/frm/my_html_landing_page_here.html"
)
settings.javaScriptEnabled = true
settings.domStorageEnabled = true
}
Also make sure that your entire folder is inside the Assets folder (this includes HTML, Javascript and other file needed)
Xamarin Android also has the same problem that WebView does not execute any Javascript. Follow #computingfreak answer:
this.SetContentView(Resource.Layout.activity_main);
var webView = this.FindViewById<WebView>(Resource.Id.webView);
var webSettings = webView.Settings;
webSettings.JavaScriptEnabled = true;
webSettings.DomStorageEnabled = true;
webSettings.LoadWithOverviewMode = true;
webSettings.UseWideViewPort = true;
webSettings.BuiltInZoomControls = true;
webSettings.DisplayZoomControls = false;
webSettings.SetSupportZoom(true);
webSettings.DefaultTextEncodingName = "utf-8";
Weirdly enough they changed all setter methods to properties except SetSupportZoom and SupportZoom stays as getter :/
Just permit your WebView to run JS, simple like that:
WebView web=(WebView)findViewById(R.id.web);
web.getSettings().setJavaScriptEnabled(true);
To enable javascript popups in WebView its necessary to set webChromeClient and override openFileChooser methods.
mWebview.setWebChromeClient(new WebChromeClient(){
// For Android 4.1+
#SuppressWarnings("unused")
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType(acceptType);
startActivityForResult(Intent.createChooser(i, "SELECT"), 100);
}
// For Android 5.0+
#SuppressLint("NewApi")
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
if (mUploadMessageArr != null) {
mUploadMessageArr.onReceiveValue(null);
mUploadMessageArr = null;
}
mUploadMessageArr = filePathCallback;
Intent intent = fileChooserParams.createIntent();
try {
startActivityForResult(intent, 101);
} catch (ActivityNotFoundException e) {
mUploadMessageArr = null;
Toast.makeText(activity,"Some error occurred.", Toast.LENGTH_LONG).show();
return false;
}
return true;
}
});
And handle the onActivityResult as below:
#SuppressLint("NewApi")
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 100) {
if (mUploadMessage == null) return;
Uri result = data == null || resultCode != Activity.RESULT_OK ? null : data.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
}
else if (requestCode == 101) {
if (mUploadMessageArr == null) return;
mUploadMessageArr.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
mUploadMessageArr = null;
}
}
If nothing above helped try to add delay in WebViewClient.onPageFinished listener
override fun onPageFinished(view: WebView?, url: String?) {
Handler().postDelayed({
//update your view with js here
super.onPageFinished(view, url)
}, 1000)
}