Not getting passing data from Activity to activity

Question

I am not getting data which i passed from another Activity using intent.putExtra. Overall it is also not showing errors. I am new to Android and Kotlin

Activity One

        i2.setOnClickListener(View.OnClickListener {
            var i = Intent(this,Courses::class.java)
            i.putExtra("semester",'2')
            startActivity(i)
        })

Activity Two

var semester:String? = null
semester = intent.getStringExtra("semester")

Not getting any data Just null and also not getting error. I tested it to show using Toast

Answer 1

改用双引号

i.putExtra("semester","2")

Answer 2

Try like this, it should work.

i2.setOnClickListener(View.OnClickListener {
            Intent i = new Intent(this,Courses.class)
            i.putExtra("semester",'2')
            startActivity(i)
        })

In second activity try this in OnCreate method:

    Intent intent = getIntent();
    savedInstanceState = intent.getExtras();
    char exampleVariable = savedInstanceState.get("semester");