我对Bootstrap有问题。例如，当我在Codepen中检查代码时，导航栏会做出响应，从可见链接更改为汉堡菜单，但是如果我在文档中对其进行检查，则无论汉堡的分辨率是大还是小，它始终是汉堡菜单。你能帮助我吗？我正在尝试解决它，我不知道发生了什么。
body {
background-image: url("img/bg.png");
font-family: 'Raleway', sans-serif;
}<html lang="pl">
<head>
<title></title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
<link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.6/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<nav class="navbar navbar-toggleable-md navbar-light" id="commRollover">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#"><img src="img/logo.png" alt="Logo" style="height: 40px;"></a>
<div class="collapse navbar-collapse justify-content-end" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="#">O nas<span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a …我想在Android Studio中更改textViews的文本for循环,类似于:
for i = 0 ------------> textView0设置文本"默认"
for i = 1 ------------> textView1设置文本"默认"
for i = 2 ------------> textView2设置文本"默认"
有可能吗？我不知道如何根据"i"值更改循环内的textView id,有人可以帮帮我吗？
这是我的XML:
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="--------------"
android:id="@+id/textView0"
android:layout_marginLeft="16dp"
android:layout_gravity="center_horizontal"
android:textSize="13dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="--------------"
android:id="@+id/textView1"
android:layout_gravity="center_horizontal"
android:layout_marginLeft="16dp"
android:textSize="13dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="--------------"
android:id="@+id/textView2"
android:layout_gravity="center_horizontal"
android:layout_marginLeft="16dp"
android:textSize="13dp" />