attempt to Invoke virtual function on a null object reference

Question

Actually my MainActivity has four fragments. And i am trying to play the animation on 1st fragment of MainActivity the error is :

" Attempt to invoke virtual method 'void android.widget.TextView.startAnimation(android.view.animation.Animation)' on a null object reference"

below is my code :

override fun onCreate(savedInstanceState: Bundle?) {

    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    createFragmentOne()
    nav.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
    nav.setItemIconTintList(null)
    try{
        var sep :TextView?
        sep = findViewById<TextView>(R.id.sepratesection)
        var anim = AnimationUtils.loadAnimation(this,R.anim.blink)
        sep.startAnimation(anim)
    }
    catch (e : Exception)
    {
        e.printStackTrace()
    }

TextView is in First Fragment .

Possible duplicate of [What is a NullPointerException, and how do I fix it?](https://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-do-i-fix-it) — Tamir Abutbul, May 07 '19 at 18:05
"`TextView` is in First `Fragment` ." – Then you should be handling it in the `Fragment`, rather than in the `Activity`. — Mike M., May 09 '19 at 01:19

score 1 · Answer 1 · answered May 07 '19 at 18:08

1

You try this with kotlin so try directly like

sepratesection .startAnimation(anim)

answered May 07 '19 at 18:08

Ajay Kumar Sharma

74
6

attempt to Invoke virtual function on a null object reference

1 Answers1