In my app I dynamically create a list of buttons. The user should be able to click on them. A short click would select the buttom as the current item, while a long click should enter the editor for this item.
Now I wonder how I can determine and set the colors that i should use. My first idea was to simply read the background and textcolor and switch them, however I'm not sure if this would be really the appropriate way to do this. So I was wondering if there is a an appropriate way of how to retrieve colors.
Of course I could hardcode some colors, but I don't know what color scheme the user has set and they might not be visible in a good way.
Please note, that, since I have to create the buttons dynamically, I can not set it in the XML.
You could simply use a ToggleButton, so android will take care of marking a "clicked" button as selected.
Since ToggleButton is a View, it has a setOnLongClickListener(Listener)-method, which can be used to make the ToggleButton long-clickable.
Related
I'm trying to create an overlay that is triggered when a button is pressed. This overlay is supposed to allow the user to add their contact and I was wondering how can I use fragments to get this effect like you can see in this mockup.
I am in a dilemna over using fragments is the right choice. My reasoning being that I only need to have it do one task that is adding contacts, and thus I do not need a whole activity.
This is what I have on the main activity right now
I would really appreciate any help on understanding how to make this work.
You can use a DialogFragment.
It behaves like a normal Fragment for the most part. Here is a guide for a basic implementation https://guides.codepath.com/android/using-dialogfragment
They appear automatically in the center of the screen. To get it a bit lower like in your mockup you can change where it is in the window. Here is an answer showing such Position of DialogFragment in Android
I am writing a Java program to record some events and their status, i.e., done or not. I have implemented the recording and calculations, but I also want to have a button that will open another window that will list the events with a checkbox corresponding to each of them, so I can pick which ones' statuses I will change to done. I have only used Swing libraries so far.
I want this window to contain one event per line, with a checkbox next to the event. Each checkbox should determine whether the status of the even should be changed or not. I had trouble even making such a window open and list the items, let alone put the checkbox.
Note: The design is not too important. This won't be a published project, I will mostly use it for personal work. I can do with buttons instead of checkboxes, where any click changes the status of the event next to it.
Thank you in advance for your valuable responses.
So here is what my app looks like so far. Every time I click the "+" button I go into another activity where I enter description, date and time and dynamically create a horizontal LinearLayout. With the X button to the left I'm deleting said layouts with this code (I know it's not the best way but it works for me so far):
final Task toBeRemoved = x;
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
myLayout.removeView((ViewGroup) v.getParent());
Task.tasks.remove(toBeRemoved);
}
});
..while iterating through each element in a list where I store my values in my OnCreate method.
What I want to do now is make it so I can remove them with the assistance of the checkboxes and the "Clear" button as well.
I have added each layout dynamically, though, so I can't think of any way for me to determine which one I've checked for deletion. They have no id, they can't be stored anywhere so I can iterate through them, as far as I know. What can I do in this situation?
A couple of ways. One would be to set listeners on each new checkbox and keep a Set of views with a checked state (add to the Set when checked, remove when unchecked). Then when clear is pressed, you remove all views in that Set.
The other way is to lopp through all the child views of the parent layout above the dynamically. For each one, find the checkbox child via findViewById, and see if its check. Remove it if it is. This is computationally expensive if you have lots of complex views
I prefer method 1 myself, but either works.
I have added each layout dynamically, though, so I can't think of any
way for me to determine which one I've checked for deletion
that's not true. You can call setId( ) or setTag() while you are adding each layout,
They have no id, they can't be stored anywhere so I can iterate
through them, as far as I know. What can I do in this situation?
now they have one. You can either use findViewById or findViewWithTag
Here's a solution that I consider pretty cool.
Create a widget on your own.It's easy.
So, you would have a class that extends ...probably LinearLayout.Depends on your needs.
You create the button,the editText, the textview and the check box, than you add functionality like you want.
When the Check box is pressed, I suppose you want the X circle button to get activated and when you press it, it deletes the whole "thing".This way you won't even need the clear button.You will still need the add button though, so you can add how many of those items you need.
It's easy,practical and makes the code reusable, which is something I look for always.
If you need more help, I can help you in a bit more detail ,but I can't always be around so I am sorry if I will respond a bit slow.
The question is straightforward enough... Is there a way to get the text off of an android switch button in code? No, I don't mean by checking if the switch control is checked and then just pulling the textOn/textOff text. Reason is, I need to pull the text while the user is dragging the control over to the on/off position. I need a way to pull what is currently be shown because I will be acting on the state change on drag not on checked. I already tried mySwitch.getText(), but it is empty. Any help is appreciated. OR, if you have a solution in determining when the user drags the switch all the way to the on position or the off position. Again, not using the onchecked listener since this is only triggered after the user lifts there finger from the switch control. Just when dragging the switch. Thank you.
Use getTextOn() and getTextOff() to get the text. That said, I don't understand why you need these and why you cannot use the OnCheckedChangedListener -- Switch does not have a "dragging" state, it's a binary state on or off. It's basically a fancy CheckBox.
I want to display to user that a check box cannot be selected. I have made it greyed, but I wanted to show a cross (X) in the check box instead of default tick) on selecting.
Is there a way to show cross mark in the check box when it is selected.
SWT Widgets are OS dependent, meaning that the OS determines what they look like.
Consequently, there is no way of making a Button show a "X" without considerable coding on your side.
Your best option would be to create a completely new Widget based on Composite or Canvas and do the painting completely yourself.