uniapp打包的APP引导用户打开手机通知权限

/**
 * 设置手机通知权限
 */
function setPermissions() {
	// #ifdef APP-PLUS  
	if (plus.os.name == 'Android') { // 判断是Android
		var main = plus.android.runtimeMainActivity();
		var pkName = main.getPackageName();
		var uid = main.getApplicationInfo().plusGetAttribute("uid");
		var NotificationManagerCompat = plus.android.importClass("android.support.v4.app.NotificationManagerCompat");
		//android.support.v4升级为androidx
		if (NotificationManagerCompat == null) {
			NotificationManagerCompat = plus.android.importClass("androidx.core.app.NotificationManagerCompat");
		}
		var areNotificationsEnabled = NotificationManagerCompat.from(main).areNotificationsEnabled();
		// 未开通‘允许通知’权限，则弹窗提醒开通，并点击确认后，跳转到系统设置页面进行设置  
		if (!areNotificationsEnabled) {
			uni.showModal({
				title: '通知权限开启提醒',
				content: '您还没有开启通知权限，无法接受到消息通知，请前往设置！',
				showCancel: f