uni-app 【报Bug】setTabBarStyle APP下无法动态设置midButton

uni-app 【报Bug】setTabBarStyle APP下无法动态设置midButton

示例代码：

<template>  
    <view class="content">  
        页面 - 1  
        <button @tap="showButton">显示中间按钮</button>  
        <button @tap="hideButton1">隐藏中间按钮方法1</button>  
        <button @tap="hideButton2">隐藏中间按钮方法2</button>  
        <button @tap="showtabBar">显示tabBar</button>  
        <button @tap="hidetabBar">隐藏tabBar</button>  
        <button @tap="switchIcon">更换图标</button>  
    </view>  
</template>  

<script>  
export default {  
    data() {  
        return {  
            title: 'Hello'  
        }  
    },  
    onLoad() {  
    },  
    methods: {  
        showButton(){  
            uni.setTabBarStyle({  
                midButton : {  
                    "iconPath": "static/img/tabbar/add.png"  
                }  
            })  
        },            
        hideButton1(){  
            uni.setTabBarStyle({  
                midButton: undefined  
            })  
        },        
        hideButton2(){  
            uni.setTabBarStyle({  
                midButton: {  
                    "iconPath": "",  
                    "width": "0px"  
                }  
            })  
        },  
        showtabBar(){  
            uni.showTabBar()  
        },  
        hidetabBar(){  
            uni.hideTabBar()  
        },  
        switchIcon(){  
            uni.setTabBarStyle({  
                midButton : {  
                    "iconPath": "static/img/tabbar/home.png"  
                }  
            })  
        }  
    }  
}  
</script>  

<style>  
    .content {  
        text-align: center;  
        height: 400upx;  
        margin-top: 200upx;  
    }  
</style>

操作步骤：

• 点击“隐藏中间按钮方法1”

预期结果：

• tabBar中midButton不显示

实际结果：

• 安卓APP中tabBar中midButton没有变化，H5下midButton消失

bug描述：

安卓app下，无法通过下面代码隐藏midButton

hideButton1(){  
    uni.setTabBarStyle({  
        midButton: undefined  
    })  
},        
hideButton2(){  
    uni.setTabBarStyle({  
        midButton: {  
            "iconPath": "",  
            "width": "0px"  
        }  
    })  
},