【Java】How to Use SeekBar 5

MainActivity.java

package com.example.seekbarsample;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

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

        TextView textView = findViewById(R.id.textView);
        SeekBar seekbar = findViewById(R.id.seekbar);
        Button button = findViewById(R.id.button);

        // 初期値を表示
        textView.setText(seekbar.getProgress() + "");

        // 「リセット」を押したら50にする
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                seekbar.setProgress(50);
            }
        });

        // SeekBarイベント
        seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                textView.setText(i + "");
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
            }
        });
    }
}