安卓应用，两个微调onItemSelected

import android.app.Activity;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.NumberPicker;
import android.widget.Toast;

public class MainActivity extends Activity {
    private NumberPicker numberPicker1;
    private NumberPicker numberPicker2;

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

        numberPicker1 = findViewById(R.id.numberPicker1);
        numberPicker2 = findViewById(R.id.numberPicker2);

        // 设置微调控件的最小值和最大值
        numberPicker1.setMinValue(0);
        numberPicker1.setMaxValue(10);
        numberPicker2.setMinValue(0);
        numberPicker2.setMaxValue(10);

        // 设置微调控件的选择监听器
        numberPicker1.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                // 当numberPicker1的数值发生变化时执行的操作
                Toast.makeText(MainActivity.this, "numberPicker1选择了：" + newVal, Toast.LENGTH_SHORT).show();
            }
        });

        numberPicker2.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                // 当numberPicker2的数值发生变化时执行的操作
                Toast.makeText(MainActivity.this, "numberPicker2选择了：" + newVal, Toast.LENGTH_SHORT).show();
            }
        });
    }
}