[ 안드로이드 기본 ] 간단한 Thread 테스트

1. ThreadTest

Thread 를 활용해 다음과 같은 화면 만들어보기

▼결과화면

 

▼activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

 

▼MainActivity.java

package kr.ac.dju.threadtest01;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class MainActivity extends AppCompatActivity {

    private Thread thread;
    private TextView textView;
    private  int number = 0;

    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_main);

        textView = (TextView) findViewById(R.id.textView);

        thread = new Thread() {
            @Override
            public void run() {
                super.run();
                while (true) {
                    try {
                        Thread.sleep(1000);
                        number++;
                        Log.i("test", "thread running..."+number);

                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                textView.setText(String.valueOf(number));
                            }
                        });
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            }
        };
        thread.start();
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        thread.interrupt(); //액티비티 종료 시 스레드도 정리
    }
}