I want to generate expandable list on click of button - java

In my application I am having 5 checkboxes for displaying different task on another activity
in this user have to select 1, 2 or 3 checkbox which he/she want to see on next screen.
In first screen i am having Save button. after checking checkboxes user have to click on save button.
My question is I want to show only those Expandable list on second activity which is selected by user on check box when user click on save button
please tell me how to do this?
Thank you very much.

save the selected check-boxs and then when you inflate the expandable listview adapter return views only for the selected ones

create dynamic array of selected Item, and assign this array to the group array

Related

Using 5 buttons to launch one dialogbox

I have a layout that contains 5 buttons which must display one particular dialogbox on clicking any of the buttons.
I assigned one id to the buttons and set an onClick listener to it.
surprisingly, only the first button on the layout displays the dialogbox and others do not.
how can i make all of them to display that particular dialog because i don't want to create different dialog for each button.
Please use a class to assign the attribute. Multiple buttons cannot have the same id.

How to detect whether the user has selected an item on a ListView?

I have a ListView with items in it, and to go to the next page, the user must select an item, because the next page is about modifying the selected item.
To go to the next page, the user clicks a button labeled "Next". I have this grayed out by default, but I'd like it to be un-grayed the moment the user clicks on an element in the ListView.
At the moment, I have it set on onMouseClick which isn't very effective because this activates quite literally whenever the ListView node is clicked, not when an element is.
How would I solve this?
You can check the original tutorial, section "Processing the List Item Selection" (Example 11-5).
listView.getSelectionModel().selectedItemProperty().addListener((obs, oldVal, newVal) -> {
// newVal contains the selected item
});
Also you can bind disableProperty of the Button to the selectedItemProperty of the selection model of the ListView conditionally:
nextButton.disableProperty().bind(listView.getSelectionModel().selectedItemProperty().isNull());

Dynamically Adding Spinner Via java in android

I am currently trying to get a function working similar to how adding phone numbers work in your android phone contact list. What I mean by this is that if a contact has more than one phone number you can click the + button and it adds another field to the display for another number.
What I'm trying to do is when the user clicks a + button it adds a new spinner right below the existing spinner with the same data in it. I'm not quite sure how to go about creating the spinner to appear below the existing spinner but still above all the content below the existing spinner. Any suggestions?

How to select / highlight an item in listview without touching it?

On click on next button, the list should highlight/select next item in the listview.
How can i achieve it without actually touching the list item directly on the screen?
ListView.setSelection(int pos) will help you to achieve this.
on next click u can change the background of the respective item and store the position for further work.this will be act as selected items

How to pass widget values from one tab to another tab in GXT?

Im using GXT 2.1.1, I want to to pass widget values from one tab to another tab.For Example I have created two tabs, the first tab displays all the information of students
in a grid with name, date of join, course selected .... and in other tab i want to
display the student information. When ever a user selects the student from the
grid then that should take him to the next tab with all the details of that particular
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Add a listener to the grid (row click) or add a "View" button as one of the columns and add a clickListener to it. In the listener, get the student's id and call a method on the second tab to display the details. Then simply call
tabPanel.setSelection(secondTab);
// tabPanel instance of TabPanel
// secondTab instance of TabItem
This should do it.

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