import ohos.aafwk.ability.Ability;
import ohos.aafwk.content.Intent;
import ohos.agp.components.*;

public class MyPickerAbility extends Ability {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_my_picker);

        // 获取 Picker
        Picker picker = (Picker) findComponentById(ResourceTable.Id_picker);

        // 设置 Picker 的数据源
        String[] data = {"Option 1", "Option 2", "Option 3", "Option 4"};
        picker.setMinValue(0); // 设置最小值
        picker.setMaxValue(data.length - 1); // 设置最大值
        picker.setDisplayedData(data);

        // 设置选中监听器
        picker.setValueChangedListener(new Picker.ValueChangedListener() {
            @Override
            public void onValueChanged(Picker picker, int oldValue, int newValue) {
                // 处理选中值变化事件
                System.out.println("Selected value: " + data[newValue]);
            }
        });
    }
}