2021-08-19 HarmonyOS实战 Switch的使用_harmonyos开发 switch状态保存

<?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="horizontal">


    <Switch
        ohos:id="$+id:choose"
        ohos:height="40vp"
        ohos:width="100vp"
        ohos:text_state_on="开"
        ohos:text_state_off="关"
        ohos:text_size="20vp"
        />

<!--
    设置滑块
    ohos:thumb_element="#07C160"
       设置滑轨
    ohos:track_element="#FF0000"-->

</DirectionalLayout>
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package com.example.switchapplication.slice;

import com.example.switchapplication.ResourceTable;
import com.example.switchapplication.dialogutils.ToastUtils;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.components.AbsButton;
import ohos.agp.components.Component;
import ohos.agp.components.Switch;

public class MainAbilitySlice extends AbilitySlice implements AbsButton.CheckedStateChangedListener {

    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);

        //找到开关组件
        Switch choose = (Switch) findComponentById(ResourceTable.Id_choose);


        //给开关组件绑定事件
        //单击事件
        //状态改变事件
        choose.setCheckedStateChangedListener(this);

    }


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

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

    //当开关组件状态发生改变的时候，那么就会调用这个方法
    //参数一：表示状态改变的那个开关组件
    //参数二：表示组件当前的状态
    @Override
    public void onCheckedChanged(AbsButton absButton, boolean b) {
        if(b){
            //ToastUtils.showDialog(this,"开关开启了");
            //可以打开某个设置
        }else{
            //ToastUtils.showDialog(this,"开关关闭了");
            //可以关闭某个设置
        }
    }
}

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