In the Flutter code in Android Studio, I want to get Webview inside the safe view as it passes behind the status bar. How can use below code with SafeView widget? Thank you.
#override
Widget build(BuildContext context) {
getDeviceID();
if (deviceID == null) {
deviceID = "unknown";
}
String webViewUrl = "https://xxx.xxx.com/login.aspx?deviceid=" + deviceID;
return WebviewScaffold(
url: webViewUrl,
withJavascript: true,
withZoom: false
);
}
}
Related
Here is the example given in the Flutter document of flutter_polyline_point
import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:flutter_polyline_points/flutter_polyline_points.dart';
import 'Constants.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Polyline example',
theme: ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.orange,
),
home: MapScreen(),
);
}
}
class MapScreen extends StatefulWidget {
#override
_MapScreenState createState() => _MapScreenState();
}
class _MapScreenState extends State<MapScreen> {
GoogleMapController mapController;
double _originLatitude = 6.5212402, _originLongitude = 3.3679965;
double _destLatitude = 6.849660, _destLongitude = 3.648190;
Map<MarkerId, Marker> markers = {};
Map<PolylineId, Polyline> polylines = {};
List<LatLng> polylineCoordinates = [];
PolylinePoints polylinePoints = PolylinePoints();
String googleAPiKey = Constants.MAP_API_KEY;
#override
void initState() {
super.initState();
/// origin marker
_addMarker(LatLng(_originLatitude, _originLongitude), "origin",
BitmapDescriptor.defaultMarker);
/// destination marker
_addMarker(LatLng(_destLatitude, _destLongitude), "destination",
BitmapDescriptor.defaultMarkerWithHue(90));
_getPolyline();
}
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: GoogleMap(
initialCameraPosition: CameraPosition(
target: LatLng(_originLatitude, _originLongitude), zoom: 15),
myLocationEnabled: true,
tiltGesturesEnabled: true,
compassEnabled: true,
scrollGesturesEnabled: true,
zoomGesturesEnabled: true,
onMapCreated: _onMapCreated,
markers: Set<Marker>.of(markers.values),
polylines: Set<Polyline>.of(polylines.values),
)),
);
}
void _onMapCreated(GoogleMapController controller) async {
mapController = controller;
}
_addMarker(LatLng position, String id, BitmapDescriptor descriptor) {
MarkerId markerId = MarkerId(id);
Marker marker =
Marker(markerId: markerId, icon: descriptor, position: position);
markers[markerId] = marker;
}
_addPolyLine() {
PolylineId id = PolylineId("poly");
Polyline polyline = Polyline(
polylineId: id, color: Colors.red, points: polylineCoordinates);
polylines[id] = polyline;
setState(() {});
}
_getPolyline() async {
PolylineResult result = await polylinePoints.getRouteBetweenCoordinates(
Constants.API_KEY,
PointLatLng(_originLatitude, _originLongitude),
PointLatLng(_destLatitude, _destLongitude),
travelMode: TravelMode.driving,
wayPoints: [PolylineWayPoint(location: "Sabo, Yaba Lagos Nigeria")]
);
if (result.points.isNotEmpty) {
result.points.forEach((PointLatLng point) {
polylineCoordinates.add(LatLng(point.latitude, point.longitude));
});
}
_addPolyLine();
}
}
What is the difference between API_KEY and MAP_API_KEY? I am getting error there while trying to execute the example.
My requirement is to get the polyline points between two places in google map.
Kindly suggest me some examples to get the polyline drawn; if you have. I am getting problem in drawing the routes. Tried many examples but not getting it.
To use google maps, you need to get an API key from the following link:
https://developers.google.com/maps/documentation/javascript/get-api-key
This should be the MAP_API_KEY constant.
To use the direction api, you need to get an API key from the following link:
https://developers.google.com/maps/documentation/directions/get-api-key
This should be the API_KEY constant.
I have added a webview plugin (official flutter plugin) for viewing webpages.
One of the webpage has a youtube video playing and when I press the home button and the app goes into background. But the problem is that the sound keeps on playing.
There are other sections in the application that contain some component playing sound or video.
So I want to know what can be done to pause the webview altogether once I move the app to background.
I am currently using this webview plugin: webview_flutter: ^0.3.9+1
There is no option in the plugin to pause the webview itself.
Got the same issue on Android side with webview_flutter: ^0.3.18+1.
I found a solution to pause the video by requesting audio focus again in the onPause callback of host Activity.
val audioManager = activity.getSystemService(Context.AUDIO_SERVICE) as AudioManager
if (audioManager.isMusicActive) {
if (Utils.hasOreoSDK26()) {
val audioAttributes = AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build()
val audioFocusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)
.setAudioAttributes(audioAttributes)
.setAcceptsDelayedFocusGain(true)
.setWillPauseWhenDucked(true)
.setOnAudioFocusChangeListener(
{ focusChange -> Timber.i(">>> Focus change to : %d", focusChange) },
Handler())
.build()
audioManager.requestAudioFocus(audioFocusRequest)
} else {
audioManager.requestAudioFocus({ }, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)
}
}
Also check this issue.
It's not possible from Dart using the webview_flutter plugin.
However, you can use my plugin flutter_inappwebview, which is a Flutter plugin that allows you to add inline WebViews or open an in-app browser window and has a lot of events, methods, and options to control WebViews.
It implements methods to pause/resume the WebView.
For Android, you can use InAppWebViewController.android.pause and InAppWebViewController.android.resume to pause and resume WebView.
You should implement WidgetsBindingObserver in your Widget and check AppLifecycleState state through didChangeAppLifecycleState() method.
If you need to pause/resume also JavaScript execution you can use InAppWebViewController.pauseTimers/InAppWebViewController.resumeTimers methods.
Here is an example with a YouTube URL:
import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
Future main() async {
WidgetsFlutterBinding.ensureInitialized();
runApp(MyApp());
}
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => new _MyAppState();
}
class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
InAppWebViewController webView;
#override
void initState() {
WidgetsBinding.instance.addObserver(this);
super.initState();
}
#override
void dispose() {
WidgetsBinding.instance.removeObserver(this);
super.dispose();
}
#override
void didChangeAppLifecycleState(AppLifecycleState state) {
print('state = $state');
if (webView != null) {
if (state == AppLifecycleState.paused) {
webView.pauseTimers();
if (Platform.isAndroid) {
webView.android.pause();
}
} else {
webView.resumeTimers();
if (Platform.isAndroid) {
webView.android.resume();
}
}
}
}
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('InAppWebView Example'),
),
body: Container(
child: Column(children: <Widget>[
Expanded(
child: InAppWebView(
initialUrl: "https://www.youtube.com/watch?v=NfNdXgJZfFo",
initialHeaders: {},
initialOptions: InAppWebViewGroupOptions(
crossPlatform: InAppWebViewOptions(
debuggingEnabled: true,
),
),
onWebViewCreated: (InAppWebViewController controller) {
webView = controller;
},
onLoadStart: (InAppWebViewController controller, String url) {},
onLoadStop: (InAppWebViewController controller, String url) {},
))
])),
),
);
}
}
I can't find any question exactly like this: Is there a way in JavaFX to display a GUI (stage) that accepts text that a user drap-and-drops from a browser?
For instance, the user navigates to a certain URL, then copies all of the page's text and drags it into the JavaFX stage displayed. The text can then be used within the Java program. I'd prefer not to use Selenium so that my app doesn't perform any scrape-like activities.
I'm looking for a solution compatible with Windows XP+ and all browsers.
Any feedback regarding starting points, tutorials, posts or limitations is great. Thank you
You may try something like this:
public class MainApp extends Application {
#Override
public void start(Stage stage) throws Exception {
TextField textField = new TextField();
textField.setPromptText("Drag text here");
textField.addEventHandler(
DragEvent.DRAG_OVER,
event -> {
if (event.getDragboard().hasString()) {
event.acceptTransferModes(TransferMode.COPY);
}
event.consume();
});
textField.addEventHandler(
DragEvent.DRAG_DROPPED,
event -> {
Dragboard dragboard = event.getDragboard();
if (event.getTransferMode() == TransferMode.COPY &&
dragboard.hasString()) {
textField.setText(dragboard.getString());
event.setDropCompleted(true);
}
event.consume();
});
StackPane stackPane = new StackPane(textField);
stackPane.setPadding(new Insets(5));
stage.setScene(new Scene(stackPane, 300, 150));
stage.setTitle("Drag and Drop");
stage.show();
}
public static void main(String[] args) {
MainApp.launch(args);
}
}
Getting HTML content
TextArea textArea = new TextArea();
textArea.setPromptText("Drag text here");
textArea.addEventHandler(
DragEvent.DRAG_OVER,
event -> {
if (event.getDragboard().hasHtml()) {
event.acceptTransferModes(TransferMode.COPY);
}
event.consume();
});
textArea.addEventHandler(
DragEvent.DRAG_DROPPED,
event -> {
Dragboard dragboard = event.getDragboard();
if (event.getTransferMode() == TransferMode.COPY &&
dragboard.hasHtml()) {
textArea.setText(dragboard.getHtml());
event.setDropCompleted(true);
}
event.consume();
});
my web application offers a download. Javascript creats at the click the url (it depends on the user input) and the browser should open it, so that the page isn't reloaded.
For that, I think I have to alternatives:
// Alt1:
window.open(pathToFile);
// Alt2:
var downloadFrame = document.getElementById('downloads');
if (downloadFrame === null) {
downloadFrame = document.createElement('iframe');
downloadFrame.id = 'downloads';
downloadFrame.style.display = 'none';
document.body.appendChild(downloadFrame);
}
downloadFrame.src = pathToFile;
Both works under Firefox. Problem with open new window method: If the creation of the file at the server needs more time, the new empty tab will be closed late.
Problem with iframe: If there is an error at the server, no feedback is given.
I think at firefox the iframe is the better solution. But the web application must run with an JavaFX WebView, too. JavaFX haven't a download feature, I have to write it. One possible way is to listen on the location property:
final WebView webView = new WebView();
webView.getEngine().locationProperty().addListener(new ChangeListener<String>() {
#Override public void changed(ObservableValue<? extends String> observableValue, String oldLoc, String newLoc) {
if (newLoc.cotains("/download")) {
FileChooser chooser = new FileChooser();
chooser.setTitle("Save " + newLoc);
File saveFile = chooser.showSaveDialog(webView.getEngine().getScene().getWindow());
if (saveFile != null) {
BufferedInputStream is = null;
BufferedOutputStream os = null;
try {
is = new BufferedInputStream(new URL(newLoc).openStream());
os = new BufferedOutputStream(new FileOutputStream(saveFile));
while ((readBytes = is.read()) != -1) {
os.write(b);
}
} finally {
try { if (is != null) is.close(); } catch (IOException e) {}
try { if (os != null) os.close(); } catch (IOException e) {}
}
}
}
}
}
There are some problems:
The download start depends on a part of the url, because JafaFX supports no access to the http headers (that is bearable)
If the user starts the download with the same url two times, only the first download works (the change event only fires, if the url is new). I can crate unique urls (with #1, #2 and so on at the end). But this is ugly.
Only the "window.open(pathToFile);" method works. Loading an iframe don't fire the change location event of the website. That is expectable but I haven't found the right Listener.
Can someone help me to solve 2. or 3.?
Thank you!
PS: Sorry for my bad english.
edit:
For 2. I found a way. I don't know if it is a good one, if it is performant, if the new webview is deleted or is in the cache after download, ....
And the user don't get an feedback, when some a problem is raised:
webView.getEngine().setCreatePopupHandler(new Callback<PopupFeatures, WebEngine>() {
#Override public WebEngine call(PopupFeatures config) {
final WebView downloader = new WebView();
downloader.getEngine().locationProperty().addListener(/* The Listener from above */);
return downloader.getEngine();
}
}
I think you may just need to use copyURLtoFile to get the file...call that when the location changes or just call that using a registered java class. Something like this:
org.apache.commons.io.FileUtils.copyURLToFile(new URL(newLoc), new File(System.getProperty("user.home")+filename));
Using copyURLToFile the current page doesn't have to serve the file. I think registering the class is probably the easiest way to go... something like this:
PHP Code:
Download $filename
Java (in-line class in your javafx class/window... in this case my javafx window is inside of a jframe):
public class JavaApp {
JFrame cloudFrameREF;
JavaApp(JFrame cloudFrameREF)
{
this.cloudFrameREF = cloudFrameREF;
}
public void getfile(String filename) {
String newLoc = "http://your_web_site.com/send_file.php?filename=" + filename;
org.apache.commons.io.FileUtils.copyURLToFile(new URL(newLoc), new File(System.getProperty("user.home")+filename));
}
}
This part would go in the main javafx class:
Platform.runLater(new Runnable() {
#Override
public void run() {
browser2 = new WebView();
webEngine = browser2.getEngine();
appREF = new JavaApp(cloudFrame);
webEngine.getLoadWorker().stateProperty().addListener(
new ChangeListener<State>() {
#Override public void changed(ObservableValue ov, State oldState, State newState) {
if (newState == Worker.State.SUCCEEDED) {
JSObject win
= (JSObject) webEngine.executeScript("window");
// this next line registers the JavaApp class with the page... you can then call it from javascript using "app.method_name".
win.setMember("app", appREF);
}
}
});
You may not need the frame reference... I was hacking some of my own code to test this out and the ref was useful for other things...
EDIT 2: If you're looking for an answer to a similar problem, check Stuart's answer and my comments on it.
EDIT: I am actually getting a Mono.Debugger.Soft.VMDisconnectedException. I also recently installed Windows 8.1 and Resharper (though Resharper is suspended now).
When I access a very simple list property of my view model in my MVVMCross Xamarin iOS application, the program fails. It doesn't quit most of the time: it acts like it's running. The simulator has a black screen and there is no exception. If I breakpoint on if (messagesViewModel != null) source.ItemsSource = messagesViewModel.Messages; and then type messagesViewModel.Messages into the Immediate Window, everything stops, so I can tell it is failing at this line. If instead I "step over", it never moves to the next line.
I was having similar behavior when I was toggling this code in the MvxTableViewSource:
public override int RowsInSection(UITableView tableview, int section)
{
return 1;
}
My view model looks like this:
public class MessagesViewModel : MvxViewModel
{
private List<BaseMessage> _messages = null;
public List<BaseMessage> Messages
{
get
{
return _messages; //yes, I know I'm returning null
//I wasn't at first.
}
}
public MessagesViewModel()
{
}
}
This is my ViewDIdLoad on the MvxTableViewController:
public override void ViewDidLoad()
{
base.ViewDidLoad();
var source = new MessagesTableViewSource(TableView);
//was binding here, removed it for debug purposes
//failure on second line here
var messagesViewModel = ViewModel as MessagesViewModel;
if (messagesViewModel != null) source.ItemsSource = messagesViewModel.Messages;
TableView.Source = source;
TableView.ReloadData();
}
Some initialization code:
public class App : MvxApplication
{
public App()
{
var appStart = new MvxAppStart<MessagesViewModel>();
Mvx.RegisterSingleton<IMvxAppStart>(appStart);
}
}
public partial class AppDelegate : MvxApplicationDelegate
{
//empty functions removed.
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
Window = new UIWindow(UIScreen.MainScreen.Bounds);
var presenter = new MvxTouchViewPresenter(this, Window);
var setup = new Setup(this, presenter);
setup.Initialize();
var startup = Mvx.Resolve<IMvxAppStart>();
startup.Start();
Window.MakeKeyAndVisible();
return true;
}
}
I suspect whatever the error is, it isn't in any of the code you have posted.
I just created a simple ViewModel:
public class FirstViewModel
: MvxViewModel
{
private List<string> _items = new List<string>() { "One", "Two", "Three"};
public List<string> Items
{
get { return _items; }
set { _items = value; RaisePropertyChanged(() => Items); }
}
}
And a simple View:
[Register("FirstView")]
public class FirstView : MvxTableViewController
{
public override void ViewDidLoad()
{
base.ViewDidLoad();
// ios7 layout
if (RespondsToSelector(new Selector("edgesForExtendedLayout")))
EdgesForExtendedLayout = UIRectEdge.None;
var firstViewModel = ViewModel as FirstViewModel;
var source = new MessagesTableViewSource(TableView);
source.ItemsSource = firstViewModel.Items;
TableView.Source = source;
}
public class MessagesTableViewSource : MvxTableViewSource
{
public MessagesTableViewSource(UITableView tableView) : base(tableView)
{
tableView.RegisterClassForCellReuse(typeof(MessagesCell), new NSString("MessagesCell"));
}
protected override UITableViewCell GetOrCreateCellFor(UITableView tableView, NSIndexPath indexPath, object item)
{
return tableView.DequeueReusableCell("MessagesCell");
}
}
public class MessagesCell : MvxTableViewCell
{
public MessagesCell(IntPtr handle)
: base(handle)
{
var txt = new UILabel(new RectangleF(0, 0, 320, 44));
Add(txt);
this.DelayBind(() =>
{
this.CreateBinding(txt).Apply();
});
}
}
}
And this code runs fine...
I wouldn't completely trust the integration of Xamarin.iOS with the Immediate window - it is better now than it used to be, but I've seen several problems with it before.
Some things to possibly check:
does the above code work for you?
if it does, then what's in your BaseMessage and MessagesTableViewSource classes - perhaps they are causing the problem?
can you use Mvx.Trace("The list is {0}", messagesViewModel.Messages ?? "-null") to view the list? Can you use trace within the ViewModel property get - is it being called? Can you use trace within the ViewModel constructor?
are all your assemblies building against the same versions of things? Are all your assemblies definitely rebuilt? (Check "Build|Configuration Manager")- what version of Xamarin.iOS are you running in VS and in the Mac?