MainActivityVolley

MainActivity.kt

private lateinit var getarray: Button
private lateinit var getobject: Button
private lateinit var postobject: Button

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    getarray = findViewById(R.id.getarray)
    getobject = findViewById(R.id.getobject)
    postobject = findViewById(R.id.postobject)
    click()

}

fun click(){
    getarray.setOnClickListener {
        val intent = Intent(this, GetArray::class.java)
        startActivity(intent)
    }
    getobject.setOnClickListener {
        val intent = Intent(this, GetObject::class.java)
        startActivity(intent)
    }
    postobject.setOnClickListener {
        val intent = Intent(this, PostObject::class.java)
        startActivity(intent)
    }
}