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Android Studio: println の使い方

AndroidStudio

Posted at 2023-10-13

MainActivity.kt に println を挿入

MainActivity.kt

package com.example.jpeg03

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.ImageView

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

        println("*** start ***")

        for (i in 1..5) {
            println(i)
        }
        println("*** end ***")
    }

}

実行

View -> Tool Windows -> Logcat

次のようにメッセージが表示されます。

2023-10-13 16:04:15.882  8504-8504  System.out              com.example.jpeg03                   I  *** start ***
2023-10-13 16:04:15.882  8504-8504  System.out              com.example.jpeg03                   I  1
2023-10-13 16:04:15.882  8504-8504  System.out              com.example.jpeg03                   I  2
2023-10-13 16:04:15.883  8504-8504  System.out              com.example.jpeg03                   I  3
2023-10-13 16:04:15.883  8504-8504  System.out              com.example.jpeg03                   I  4
2023-10-13 16:04:15.883  8504-8504  System.out              com.example.jpeg03                   I  5
2023-10-13 16:04:15.883  8504-8504  System.out              com.example.jpeg03                   I  *** end ***

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