Develop Reference

How to know when the user is done with text entry on an EditText control?

I want to be able to know when a user is done entering text in an EditText control. I'm thinking maybe it's best to know when the keyboard is closed or something similar. This is using Kotlin on Android app. I'm not sure why it's so hard to find basic answers like this. Maybe I'm searching with the wrong question (new to Android dev).

Using keyboard close as an indicator that the user finished entering text is a bad idea (the user might open the keyboard again to enter more text). A better solution would be to explicitly require for the user to indicate that he has finished entering the data.
You could use a "submit" button.
You can also set the android:imeOptions of EditText to actionDone and set a listener on the EditText.
editText.setOnEditorActionListener(new EditText.OnEditorActionListener() {
#Override
public boolean onEditorAction(EditText v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_DONE) {
//do your stuff
return true;
}
return false;
}
});
Update - Assuming keyboard close as the indicator is bad for a couple of reasons,
There is no 'proper' way to monitor the soft keyboard. You could try listening to the focus of the EditText or you could use the height difference to guesstimate whether the soft keyboard is open or closed(the option used in most keyboard listener libraries). But these aren't reliable and might break in production.
It's an 'unexpected' application behavior for the user. For example, the keyboard can be removed by pressing the back button. In general, the user would expect that the action would not proceed if the back button is pressed. But if you listen to keyboard close, then it would end up resulting in poorer UX.
There are no actual reasons why you would want to use keyboard close as the trigger. If you want to perform the action as the user types, then you should use TextWatcher, otherwise stick to explicit confirm options.

use onFocusChangeListener to know if the user has finished to add text and has leave the textInput focus.
Example
editText?.onFocusChangeListener =
View.OnFocusChangeListener { _,
hasFocus ->
if (!hasFocus) {
// code to execute when EditText loses focus
}
}

Android Switch, validating before toggling switch

I have a Switch, or a SwitchCompat rather on my app.
When the user clicks or slides the switch I would like to run some code to determine if they should be allowed to.
I have tried the
setOnCheckedChangeListener and setOnClickListener methods but both allow the graphic of the slider to toggle before running the validation code.
How can I run my own code before anything else when the switch is pressed?
Thanks

you should write your validation code first. if validation is false they not allowed to press switch using setEnabled(false) the else user is allowed to press switch

We have three options
One you have tried by setOnCheckedChangeListener()
Other is to disable the view entirely by using setEnabled()
You may try using setOnTouchListener and write your validation code there, and if the user is not allowed to do the functionality just return true else return false
Returning true would make the Switch believe the touch was handled and it won't do any actions for the same

Android - Manage click and longclick in listview

I am currently coding a new android Application, and I need to use both OnItemClickListener and OnItemLongClickListener on a listview. Each listener launch a different actionmode on the actionbar.
The problem is that the actionmode associated with the click event is the only that is launched even if I perform a longclick.
After some research, I understand now why : a long click event also create click event, and I guess that this last event is always perform after the long click event, so that explain why I can't manage to display the other actionmode.
The question is : how can I block the click event when i do a longclick ? Or does it exist another mean to perform what I want to do ?

onLongClick():
Returns
true if the callback consumed the long click, false otherwise.
So, if you return true the onclick won't be executed.

problem with onclick android

i've been searching the web but i find no answer to my question. I have a button, when you press it, it will play a sound. The problem is that when you touch a button on the screen it goes to the onClickListener() only after the button have been released. I need it to run the listener when the button is pressed not when it's released, because this cause a delay when playing the sound. I tried onTouchListener() and it didn't work either, because the sound get's played every time i move the finger over the button. I tried onKeyDown() but it won't work for screen buttons. Any ideas? Some help will be appreciated.
Thanks

You can use OnTouchListener and test the event action:
public boolean onTouch (View v, MotionEvent event) {
if (event.getAction () == MotionEvent.ACTION_DOWN) { // ...
}
}

Maybe you can still use your implementation for onTouchListener(). Just set a boolean flag for when the user starts touching the button, then while it is set true (meaning the user hasn't released the button yet) do not play the sound. When the user releases the button (ACTION_UP), set the flag back to false. This would mean you are ready to play the sound again.

Using an Android Long-Button press to increment/decrement counter

I want to be able to press a button on my program and hold it down (without releasing) to increment a variable. Problem I am having right now is when I conduct the long button press it only runs once, until I release and press again.
First I want to find out if there is a way to do this without having to use the OnTouchListener, and just using the OnLongClick. Is there a way to check the value of the button? For example.. buttondown=true; Conduct a whileloop to increment until the button is released.
Second, I don't want the updates to be delayed, because the incremented value is being drawn as the user holds down the button.
Basically I am doing something like this:
btn_resume.setOnLongClickListener(new OnLongClickListener() {
public boolean onLongClick(View v) {
..code..
return true;
}
});

OnLongClick will only be called once per press. It isn't going to work for your purpose.

If I understood your question correct this can be achieved using a OnLongClickListener.

Check http://developer.android.com/reference/android/view/View.html#setOnTouchListener(android.view.View.OnTouchListener)
OnTouchListener provides a more granular handling of touch events, e.g. KeyDown, KeyUp

I think you can use OnLongClickListener for increment/decrement. But once the long press is done for the button, the longpress has to be canceled or reset for the next long press of the same button.