Question

我设置了一个简单的列表视图，但它只显示一个白色的屏幕。在onOptionsItemSelected的主要活动中，我有以下代码。

<!DOCTYPE html>
<html>

  <head>
      <meta charset="utf-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">

  <title>Fintons cafe</title>
  <meta name="description" content="">
      <meta name="viewport" content="width=device-width, initial-scale=1">
      <!--<link rel="apple-touch-icon" href="apple-touch-icon.png">-->

      <link href='http://fonts.googleapis.com/css?family=Ubuntu+Mono:400,700' rel='stylesheet' type='text/css'>

       <!--if your on a subpage-->

       <link rel="stylesheet" href="../lib/css/bootstrap.min.css">
       <link rel="icon" href="../lib/img/favicon.jpg" type="image/x-icon">
       <link rel="stylesheet" href="../lib/css/bootstrap-theme.min.css">
       <link rel="stylesheet" href="../lib/css/main.css">
       <link rel="stylesheet" type="text/css" href="../lib/css/tabs.css">

       <script src="../lib/js/vendor/modernizr-2.8.3-respond-1.4.2.min.js"></script>
       <script src="../lib/js/main.js"></script>
       <script src="../lib/js/vendor/jquery-1.11.2.min.js"></script>



</head>


  <body>

    <header class="site-header">

    <nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="navbar-brand" href="/">
            <img src="../lib/img/logo1.png" class="hidden-xs visible-sm visible-md visible-lg visible-xl" />
            <img src="../lib/img/logo1.png" class="visible-xs hidden-sm" style="width:200px;" />
          </a>
        </div>

      <div id="navbar" class="navbar-collapse collapse">
        <ul class="nav navbar-nav navbar-right">

            <li><a class="nav-link" href="/">Home</a></li> <!--ensures 'Home' is first in list-->



           <!--site.pages is selected by MD root elements-->


           <!--site.pages is selected by MD root elements-->

              <!--ensures that only pages are selected (by checking the title validity), otherwise all root elements are selected-->

                <!--hack for making Home go to the left-->

                  <li><a class="nav-link" href="/about/">About Us</a></li>




           <!--site.pages is selected by MD root elements-->

              <!--ensures that only pages are selected (by checking the title validity), otherwise all root elements are selected-->

                <!--hack for making Home go to the left-->

                  <li><a class="nav-link" href="/contact/">Contact</a></li>




           <!--site.pages is selected by MD root elements-->


           <!--site.pages is selected by MD root elements-->

              <!--ensures that only pages are selected (by checking the title validity), otherwise all root elements are selected-->



           <!--site.pages is selected by MD root elements-->


           <!--site.pages is selected by MD root elements-->


           <!--site.pages is selected by MD root elements-->


           <!--site.pages is selected by MD root elements-->


           <!--site.pages is selected by MD root elements-->

              <!--ensures that only pages are selected (by checking the title validity), otherwise all root elements are selected-->

                <!--hack for making Home go to the left-->

                  <!--if this is the current page-->
                  <li><a class="nav-link selected" href="#">Menu</a></li>




        </ul>
      </div>
    </nav>

</header>

    <div class="page-content">
      <div class="wrapper">
        <article class="post">

  <header class="post-header">
    <h1 class="post-title">Menu</h1>
  </header>

  <div class="post-content">


  </div>

</article>

      </div>
    </div>

    <br />

<footer class="site-footer">

  <div class="wrapper">

    <center>Copyright &copy; 2016 | Designed by <a href="mailto:rhys.oconnor@outlook.com?Subject=Fintons%20Website">Rhys O'Connor</a></center>

  </div>

</footer>
</html>


  </body>

</html>

问题是什么？

   Intent l = new Intent(getApplicationContext(),AboutTest.class);
   startActivity(l);

活性

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/listView">
</ListView>
</RelativeLayout>

Answer 1

您正在覆盖onCreate(Bundle savedInstanceState, PersistableBundle persistentState)，但只有在API级别21或更高版本中将persistableMode设置为true的活动才会调用该方法。

相反，您应该覆盖不同的onCreate（），如下所示：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.about_test);
    ListView myList = (ListView)findViewById(R.id.listView);
    ArrayAdapter<String> adapter=new ArrayAdapter<String>(getApplicationContext(),
            android.R.layout.simple_list_item_1, list);
    myList.setAdapter(adapter);
}

android显示白色屏幕而不是列表视图

1 个答案: