java - 如何在 ListView 中显示带有数据数组的对象

Question

有以下对象:

public class Course {
    private static int courseID = 0; 
    private String courseTitle; 
    private ArrayList<Assignment> assignments;
    private Course(String title, ArrayList<Assignment> assns)
    {
        courseTitle = title;
        assignments = assns;
        courseID++;
    }
    //returns a Course instant with random assignment values
    static public Course generateRandomCourse()
    {
        Random rnd = new Random();
        int assignmentNo = rnd.nextInt(5);
        ArrayList<Assignment> tempAssns = new ArrayList<Assignment>();
        for(int i=0; i < assignmentNo; i++)
            tempAssns.add(Assignment.generateRandomAssignment());
        return new Course("Course " + courseID, tempAssns);
    }
    public String getCourseTitle() {return courseTitle;}
    public ArrayList<Assignment> getAssignments() {return assignments;}
}

类(class)包含作业对象:

public class Assignment {
    private static int assID = 0; //static ID increments with every new
    private String assignmentTitle; //title of assignment
    private int assignmentGrade; //grade of assignment
    //private constructor. Increments ID.
    private Assignment(String title, int grade)
    {
        assignmentTitle = title;
        assignmentGrade = grade;
        assID++;
    }
    //returns an Assignment instance with random values
    static public Assignment generateRandomAssignment()
    {
        Random rnd = new Random();
        String tempTitle = "Assignment " + assID;
        int tempGrade = rnd.nextInt(100) + 1;
        return new Assignment(tempTitle, tempGrade);
    }
    public String getAssignmentTitle() {return assignmentTitle; }
    public int getAssignmentGrade() {return assignmentGrade;}
}

数据必须在 ListView 中显示为:

我正在关注本教程:https://www.tutorialspoint.com/android/android_list_view.htm 。接下来，该 Activity 有一个字符串数组，创建一个适配器并将其链接到一个 Listwiew:

String[] mobileArray = {"Android","IPhone","WindowsMobile","Blackberry",
  "WebOS","Ubuntu","Windows7","Max OS X"};

ArrayAdapter adapter = new ArrayAdapter<String>(this, 
     R.layout.activity_listview, mobileArray);

listView listView = (ListView) findViewById(R.id.mobile_list);
  listView.setAdapter(adapter);

xml 文件包含:

   <ListView
      android:id="@+id/mobile_list"
      android:layout_width="match_parent"
      android:layout_height="wrap_content" >
   </ListView>

activity_listview.xml 文件包含:

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/label"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dip"
    android:textSize="16dip"
    android:textStyle="bold" >
</TextView>

如何从以下位置获取 ListView : ArrayList<Course>courses = new ArrayList<Course>() ？ ListView 中是否需要垂直布局？

<小时/>

更新:可能的布局文件course_row_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/coureTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"/>
    <ListView
        android:id="@+id/assignments"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>   
</LinearLayout>

可能的分配布局文件copy_row_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/assignmentTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"/>
    <TextView
        android:id="@+id/cassignmentGrade"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"/>        
</LinearLayout>

Answer 1

您的类(class)将是标题类型，作业将是 ListView 中行的部分类型。然后您可以在ListView中显示列表。对于您的实现帮助，您可以查看这个简单的实现---http://stacktips.com/tutorials/android/listview-with-section-header-in-android