资源放到这里面来

 图片来自百度。。。。你们也可以用别的图片

布局也很简单 一个图片 一个按钮

<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:alignment="center"
    ohos:orientation="vertical">

    <Image
        ohos:id="$+id:img"
        ohos:height="match_content"
        ohos:width="match_content"
        />
    <Button
        ohos:id="$+id:btnClick"
        ohos:height="match_content"
        ohos:text="点我"
        ohos:text_size="150"
        ohos:background_element="red"
        ohos:width="match_parent"/>

</DirectionalLayout>

代码也很简单 批量添加进来然后随机即可

package com.example.helloworld.slice;

import com.example.helloworld.ResourceTable;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.Button;
import ohos.agp.components.Component;
import ohos.agp.components.Image;

import java.util.ArrayList;
import java.util.Random;

public class ChooseGirlFirendAbilitySlice extends AbilitySlice {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_choose_girl_firend);
        ArrayList<Integer> list = new ArrayList<>();
        list.add(ResourceTable.Media_img_1);
        list.add(ResourceTable.Media_img_2);
        list.add(ResourceTable.Media_img_3);
        list.add(ResourceTable.Media_img_4);
        list.add(ResourceTable.Media_img_5);
        list.add(ResourceTable.Media_img_6);

        Image image = findComponentById(ResourceTable.Id_img);
        Button btnCick = findComponentById(ResourceTable.Id_btnClick);
        btnCick.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                Random r = new Random();
                int i = r.nextInt(list.size());
                int randomIndex = list.get(i);
                image.setImageAndDecodeBounds(randomIndex);

            }
        });


    }

    @Override
    public void onActive() {
        super.onActive();
    }

    @Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }
}

总结：

  image.setImageAndDecodeBounds(图片的资源ID);