[모바일프로그래밍] 10-1 스레드 개념

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: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:layout_marginStart="104dp"
        android:layout_marginTop="64dp"
        android:text="첫 번째 시크바"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="175dp"
        android:layout_height="30dp"
        android:layout_marginStart="104dp"
        android:layout_marginTop="140dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="104dp"
        android:layout_marginTop="196dp"
        android:text="두 번째 시크바"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView" />

    <SeekBar
        android:id="@+id/seekBar2"
        android:layout_width="175dp"
        android:layout_height="30dp"
        android:layout_marginStart="104dp"
        android:layout_marginTop="56dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView2" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="150dp"
        android:layout_marginTop="71dp"
        android:text="스레드 진행 시작"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/seekBar2" />
</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java

package com.example.myapplication;

import android.os.Bundle;
import android.os.SystemClock;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    ProgressBar myseekbar1, myseekbar2;
    Button btn;
    TextView tv1, tv2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myseekbar1 = (ProgressBar) findViewById(R.id.seekBar);
        myseekbar2 = (ProgressBar) findViewById(R.id.seekBar2);
        btn = (Button) findViewById(R.id.button);
        tv1 = (TextView) findViewById(R.id.textView);
        tv2 = (TextView) findViewById(R.id.textView2);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new Thread() {
                    public void run() {
                        for (int i = myseekbar1.getProgress(); i < 100; i += 2) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    myseekbar1.setProgress(myseekbar1.getProgress() + 2);
                                    tv1.setText("1번 시크바 진행률: " + myseekbar1.getProgress() + "%");
                                }
                            });
                            SystemClock.sleep(100);
                        }
                    }
                }.start();

                new Thread() {
                    public void run() {
                        for (int i = myseekbar2.getProgress(); i < 100; i++) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    myseekbar2.setProgress(myseekbar2.getProgress() + 1);
                                    tv2.setText("2번 시크바 진행률: " + myseekbar2.getProgress() + "%");
                                }
                            });
                            SystemClock.sleep(100);
                        }
                    }
                }.start();
            }
        });
    }
}