I will try to explain what I'm interested in and I will be happy if you can help me.
Do you know some way to show AlertDialog outside of activity (in service) without setting type TYPE_SYSTEM_ALERT / TYPE_APPLICATION_OVERLAY? for example presetting it globally with some way, maybe with ContextWrapper (I dont know if it can be done) and then create AlertDialog in standard way? it may seem like a strange question, but I need it because I can't set type for some external alertdialogs, finally my goal is to make this code working in service
AlertDialog.Builder builder = new AlertDialog.Builder(context)
.setTitle("Example")
.setMessage("Example")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
AlertDialog alertDialog = builder.create();
alertDialog.show();
Related
This subject is driving my nuts. I've read virtually a hundred posts about it, but none of them reflects my situation. I'm using a plain simple RecyclerView in an app running on AndroidTV. To enable navigation, I've set
android:focusable="true"
Now, I can use DPAD to scroll inside the RecyclerView, nicely. My goal is to animate the highlighting of the currently focused item in the list. However, I can't seem to find any event which indicates a focus change.
I would very much appreciate a hint, how my code could be informed about a focus changed inside the list, programaticaly, and how to figure out which list items have gained/lost focus.
Thanks!
Finally, it turned out that the solution is fairly easy. I don't know, why it was hidden in front of my eyes. All I had to do was to view.setOnFocusChangeListener() inside onBindViewHolder like this:
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
...
view.setOnFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View view, boolean b) {
highlightEntry(view, b);
}
});
...
}
I am very new to both java and vaadin. Hope to be able to get some good tips on how I can improve my code.
I would like to rewrite the code below to use Vaadin´s -> LoginOverlay instead of the code below.
As I said, I'm trying to learn so I have used the code for this example: https://www.youtube.com/watch?v=oMKks5AjaSQ&t=1158s
However, LoginOverlay seems to be a better way to display its login part through. As in this example: https://www.youtube.com/watch?v=pteip-kZm4M
So my question is how can you write the code below as a LoginOverlay.
public class LoginView extends Div {
public LoginView(AuthService authService) {
setId("login-view");
var username = new TextField("Username");
var password = new PasswordField("Password");
add(
new H1("Welcome"),
username,
password,
new Button("Login", event -> {
try {
authService.authenticate(username.getValue(), password.getValue());
UI.getCurrent().navigate("home");
} catch (AuthService.AuthException e) {
Notification.show("Wrong credentials.");
}
}),
new RouterLink("Register", RegisterView.class)
);
}
}
I have only come this far to convert the code.
A clarification of the new part of the code. The code does not work. The part with loginOverlay.addLoginListener (event -> probably needs to be written in a different way.
I'm using IntelliJ 2020.3.4 if that is of any help.
public class LoginView2 extends Composite<LoginOverlay> {
public LoginView2(AuthService authService) {
setId("login-view");
LoginOverlay loginOverlay = getContent();
loginOverlay.setTitle("Welcom");
loginOverlay.setDescription("Manage your business tasks");
loginOverlay.setOpened(true);
loginOverlay.addLoginListener(event -> {try {
if(authService.authenticate(username.getValue(), password.getValue());
UI.getCurrent().navigate("home");
} catch (AuthService.AuthException e) {
Notification.show("Wrong credentials.");
}
}),
new RouterLink("Register", RegisterView.class);
}
}
}
}
Super grateful for all the help you can give.
Many thanks to everyone who makes stackoverflow so amazing.
Copy-pasting code snippets with little idea about what the code does is a recipe for disaster, especially when it comes to security.
You have all kinds of errors in your code: misplaced braces, using variables that do not exist, and a RouterLink far from where it belongs.
I understand you've got to start somewhere. I would recommend starting from code that actually compiles, and then gradually adding things, testing what you have so far at every step.
Here are some tips for your LoginView2:
Remove the whole loginOverlay.addLoginListener(...) code, including the authService.authenticate call and the RouterLink. Make sure that you can run the application at this point, and that you can see the login overlay.
Add back the login listener, but for now just show a notification in it. Test that you can run the application, and that if you click Login, your notification is displayed.
loginOverlay.addLoginListener(event -> {
Notification.show("This is working");
});
Implement the authentication. You have a call to authService.authenticate(...) inside an if-statement, but the method does not return anything. Instead, it throws an exception if the authentication fails, hence the try-catch. This means that inside the try { ... } block, any code you put after the authService.authenticate(...) call is only executed if it did not throw an exception, i.e. if the authentication was successful.
There are no username or password variables. The first YouTube video had defined these variables in the form of text fields. With the login overlay, it creates those fields for you, so how do you get the corresponding values from it?
This might be a simple question but I can't figure it out.
I have a form called in my main function:
void Main() {
Mem = new MemoryManager();
Console::WriteLine("Thread Started");
Application::EnableVisualStyles();
Application::SetCompatibleTextRenderingDefault(false);
FinalSolution::ControlPanel form;
Thread^ cLoop = gcnew Thread(gcnew ThreadStart(loop));
cLoop->Start();
Application::Run(%form);
}
All I want to do is, if someone presses a key in general (not just when the program is in focus), it changes the background to a different color.
I have tried a few things but nothing has worked so far. Here is the loop and I have indicated where I want it to happen.
void loop() {
while (true) {
if (GetAsyncKeyState(key)) {
//Here
form.button->BackColor = System::Drawing::Color::ForestGreen;
}
}
}
Of course the issue is that this function doesn't know what form is, but I don't know how to tell it.
Ended up just putting the loop directly in the form header and that solved the problem.
I am working on disabling copy/paste option menus on xamarin forms Entry, I am able to disable copy option using IsPassword=true attribute but this attribute also converts the normal input field to password field, which is not a requirement.
<Entry IsPassword="true" Placeholder="Password" TextColor="Green" BackgroundColor="#2c3e50" />
Thanks in advance.
This has to do with how Forms functions. Using iOS as the example here, the CanPerform override referred to in the other answer's Bugzilla issue is using the UIMenuController as the withSender and not the UITextField itself that might otherwise be expected. This is because the EntryRenderer class is a ViewRenderer<TView, TNativeView> type and subsequently is using whatever TNativeView (in this case, the UITextView) has in its CanPerform. Because nothing is going to be overridden by default, one still sees all of the cut/copy/paste options in the UIMenuController.
As a result, there would be a couple options. You could first make the modification where if you don't want copy/paste but are fine with getting rid of everything else, you can use UIMenuController.SharedMenuController.SetMenuVisible(false, false) in a custom renderer inheriting from EntryRenderer. If you look around on SO, there are similar questions where this is a possible route.
Alternatively, you can create a "true" custom renderer inheriting from ViewRenderer<TView, TNativeView> as ViewRenderer<Entry, YourNoCopyPasteUITextFieldClassName>. The class inheriting from UITextField can then override CanPerform as something like follows:
public override bool CanPerform(Selector action, NSObject withSender)
{
if(action.Name == "paste:" || action.Name == "copy:" || action.Name == "cut:")
return false;
return base.CanPerform(action, withSender);
}
This will require more effort because the custom renderer will not have the same behavior as the EntryRenderer, but as Xamarin.Forms is now open source, you could look to it for some ideas as to how the EntryRenderer functions normally. Something similar would likely have to be done for Android.
Edit: For Android, you can probably use this SO answer as a starting point: How to disable copy/paste from/to EditText
Another custom renderer, this time inheriting from ViewRenderer<Entry, EditText>, and create a class inside of it like this (in the most basic form):
class Callback : Java.Lang.Object, ActionMode.ICallback
{
public bool OnActionItemClicked(ActionMode mode, IMenuItem item)
{
return false;
}
public bool OnCreateActionMode(ActionMode mode, IMenu menu)
{
return false;
}
public void OnDestroyActionMode(ActionMode mode)
{
}
public bool OnPrepareActionMode(ActionMode mode, IMenu menu)
{
return false;
}
}
Then, in your OnElementChanged method, you can set the native control and the CustomSelectionActionModeCallback value:
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged(e);
if (Control != null)
{
Control.CustomSelectionActionModeCallback = new Callback();
}
}
Doing something like the following appears to disable all of the copy/paste/cut functionality on the custom entry as far as the toolbar goes. However, you can still long click to show the paste button, to which I've poked around a bit hadn't found an answer yet beyond setting LongClickable to false. If I do find anything else in that regard, I'd make sure to update this.
I have another question.
I want to open a JFileChooser window when I double click on a JTable.
My code so far :
productTable.addMouseListener(new MouseAdapter(){
public void dblclick(MouseEvent click){
if (click.getClickCount() == 2){
fileChooser.setVisible(true);
}
}
});
I have fileChooser declared as a new JFileChooser box, to clear up any confusion. I kind of understand ActionListeners but my understanding is really only limited to regular buttons. I read through mouse listeners, and the code above is my understanding.
How do I add the class dblclick on double click of the JTable?
Also, if there is an easier way to approach the problem, I would greatly appreciate some pointers.
Thanks in advance!
So I actually figured it out on my own... As I figured, it was a pretty simple solution.
I changed the above code to :
productTable.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent click){
productTableMouseClicked(click);
}
});
and then I added the handler at the bottom with my other action handlers :
private void productTableMouseClicked(MouseEvent click){
if (click.getClickCount() == 2){
fileChooser.showOpenDialog(fileChooser);
}
}
So that's that, I guess.