Attempt to invoke virtual method 'void android.view.View.setAnimation(android.view.animation.Animation)' on a null object reference

Question

I have notification menu icon. I need that to be animated when onCreateOptionsMenu() called.

While implementing, i have been facing issue like below -

Attempt to invoke virtual method 'void 
android.view.View.setAnimation(android.view.animation.Animation)' on a 
null object reference.

Java code :

private Animation animation;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.home_screen,menu);

    animation = 
 AnimationUtils.loadAnimation(getApplicationContext(),R.anim.notify);

menu.findItem(R.id.notifications).getActionView().setAnimation(animation);

    return super.onCreateOptionsMenu(menu);
}

home_screen.xml :

 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto">
 <item
    android:id="@+id/notifications"
    android:title="@string/action_settings"
    app:showAsAction="ifRoom"
    android:icon="@drawable/notifications"/>
  </menu>

notify.xml :

 <?xml version="1.0" encoding="utf-8"?>
 <rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="0"
android:toDegrees="180"
android:pivotX="50%"
android:pivotY="50%"
android:duration="500"
android:interpolator="@android:anim/accelerate_interpolator" />

Kindly let me know the solution to resolve the issue. Thanks in advance.

score 0 · Answer 1 · answered Nov 08 '19 at 08:15

0

According to this answer you need to set action view first. and try to user image view as custom action view to animate your menuitem for more refrence refer this

answered Nov 08 '19 at 08:15

Amit Goswami

174
10

Attempt to invoke virtual method 'void android.view.View.setAnimation(android.view.animation.Animation)' on a null object reference

1 Answers1