Unresolved reference btn_lockitem - please help

Question

Dear Community

I want to make an android app with Android studio. Now, I have a button with the itemid "btn_lockitem" in the main.xml file, with which the user should open fragment_lockscreen.xml

Now my question:
Why is there an unresolved reference for my btn_lockitem button?

Thank you for any help
Kind regards
Errorguy

https://www.sololearn.com/post/1042211/?ref=app
https://www.sololearn.com/post/1042212/?ref=app

Answer 1

I'm really sorry, it's very difficult to know what the real issues are, remotely.

But don't give up keep finding the solution, but if you still can't then I think it's better to follow some tutorials first which I am sure you can find in youtube.
And then try again to implement it on your own.

Answer 2

declare a local variable "btn_lockitem" of whatever data type it is inside your function at the top.

Or read the error msg you are getting in Error view 1 and follow the IDE instruction that is press Alt+Umschalt+Eingabe to automatically declare and create a variable bin_lockitem for you.

Answer 3

something like this:

class MyActivity : Activity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.fragment_lockscreen)
val button = findViewById<Button>(R.id.btn_lockitem)
button.setOnClickListener(object : View.OnClickListener {
override fun onClick(v: View?) {
return view;
// Code here executes on main thread after user presses button
}
})
}
}

Answer 4

OK. Thank you for your help.

Answer 5

Errorguy hello
You shouldn't return 2 or more times
So delete the return on the top
```kt
return inflater.inflate...
```
THIS code '

Answer 6

And the other
Writing this much code super duper useless
```kt
button.setOnClickListener(object : View.onClickL...
```
Write like
```kt
button.setOnClickListener{
// your code goes here and returning view is useless
}
```

Answer 7

'Rohit like this?
Now the error is gone but the Code is unreachable. Any idea?

Sry, I am a total beginner.

https://www.sololearn.com/post/1042251/?ref=app
'
Well remove the return above, adding 2 or more return makes the bottom code unreachable

Answer 8

you forgot to declare a variable btn_lockitem in your code.

Answer 9

How do I do that, Rohit ?

Answer 10

Rohit like this?
Now the error is gone but the Code is unreachable. Any idea?

Sry, I am a total beginner.

https://www.sololearn.com/post/1042251/?ref=app

Answer 11

Check what happen when you click on the button.

According to your code it's should output some log thing.

Do you see anything like log being printed?

Answer 12

No. And it doesn't open a fragment

Answer 13

Then what's the issue... its very difficult to debug things like this remotely.

Are you following or not some tutorials, if no then I would recommend you to because these things need proper understanding and help when starting new.

Coming to the problem :
you are missing something on the fragment thing like wrong id.

Answer 14

No. I don't have any tutorials

Answer 15

Ah, I think you must return view when you click on the button, right?

Errorguy put "return view" inside the btn_lockitem.onclick...
function once and try again

Answer 16

My Code now looks like this:

class MyActivity : Activity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.fragment_lockscreen)
val button = findViewById<Button>(R.id.btn_lockitem)
button.setOnClickListener(object : View.OnClickListener {
override fun onClick(v: View?) {

// Code here executes on main thread after user presses button
}
})
}
}

Where do I need to implement the return view? Your Code was translated to kotlin automatically.

Answer 17

"View" in "return view" is an unresolved reference now.

Answer 18

Type mismatch. Required: unit
Found: View?

https://www.sololearn.com/post/1042285/?ref=app

Answer 19

what about the 2nd answer answer in this link

https://stackoverflow.com/questions/60565585/how-to-get-a-button-id-in-of-a-clicked-button

Answer 20

Too much errors. The last code was better. But why the hell is there a type mismatch? It found the view tag which is pointed to the fragment. Why it doesn't work? I don't understand