如何使用Kotlin在Android中使用Handel地图

class MainActivity：AppCompatActivity（）{

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

}

Answer 1

 //Read only map val map = mapOf("a" to 1, "b" to 2, "c" to 3) //Accessing a map println(map["key"]) map["key"] = value //Traversing a map/list of pairs for ((k, v) in map) { println("$k -> $v") }