Android（(?)Kotlin 语(Yu)言(Yan)）(?)开(Kai)发(Fa)一(Yi)个(Ge)简(Jian)单(Dan)的(De)计(Ji)数(Shu)器(Qi)应(Ying)用(Yong)

二(?)、(?)Android（(?)Kotlin 语(Yu)言(Yan)）(?)
同(Tong)样(Yang)是(Shi)一(Yi)个(Ge)简(Jian)单(Dan)的(De)计(Ji)数(Shu)器(Qi)应(Ying)用(Yong)，(?)有(You)一(Yi)个(Ge)文(Wen)本(Ben)视(Shi)图(Tu)显(Xian)示(Shi)计(Ji)数(Shu)，(?)一(Yi)个(Ge)按(An)钮(Niu)增(Zeng)加(Jia)计(Ji)数(Shu)。(?)
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.TextView

class MainActivity : AppCompatActivity() {
    private var count = 0
    private lateinit var countTextView: TextView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        countTextView = findViewById(R.id.countTextView)
        countTextView.text = "Count: $count"
    }

    fun incrementCount(view: View) {
        count++
        countTextView.text = "Count: $count"
    }
}