采用Android AutoCompleteTextView与ArrayAdapter＆LT;对象和GT;而不是ArrayAdapter＆LT;字符串＆GT; [英] Using Android AutoCompleteTextView with ArrayAdapter<Objects> instead of ArrayAdapter<Strings>

问题描述

我想在我的Andr​​oid application.I知道如何处理字符串的简单的数组用它来使用AutoCompleteTextView，但我想AutoCompleteTextView使用对象名单进行completion.My code这是以下内容：

I wanted to use AutoCompleteTextView in my android application.I know how to use it with simple array of Strings, but I wanted AutoCompleteTextView to use list of Objects to perform completion.My code for this is following:

活动code

public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.search);

        initialize();
        ArrayAdapter<Student> adapter = new ArrayAdapter<Student>(this,
                R.layout.dropdown_list_item, GetAllStudentsList());

        searchBox.setAdapter(adapter);
        searchBox.setThreshold(THRESHOLD_VALUE);
        searchBox.setTextColor(Color.BLACK);
}

searchBox.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> adapterView, View view,
                int position, long arg3) {
                     //Here i will grab the Student object that user selected from drop-down

        }

    });

public ArrayList<Movies> GetAllStudentsList() {

//This method returns a ArrayList of <Student> type objects
}

学生 Object类有关于学生是信息 ID，姓名，地址，商标。

Student class Object has information regarding a student which is ID,NAME,ADDRESS,MARKS.

我知道AutoCompleteTextView需要的String类型的对象的数组执行搜索oper​​ation.In我来说，我想AutoCompleteTextView用我的ArrayList到学生对象字段NAME.I的基础上执行完成不知道我应该怎么指定AutoCompleteTextView使用学生object.Please名外地帮我提供任何链接或一个小例子。

I know AutoCompleteTextView needs an array of String type object to perform search operation.In my case I want AutoCompleteTextView to use my ArrayList to perform completion on the basis of Student object field NAME.I dont know how should I specify AutoCompleteTextView to use NAME field of Student object.Please help me providing any Link or a small example.

感谢

推荐答案

有两种方式：

1. 覆盖的toString（）在学生类，并使其返回名称。
   你可以得到与下面code选定的对象：

1. Override toString() in Student class and make it return name. You can get the object that was selected with the following code:

 public static class Student {

    private String name;

        public Student(String name) {
            this.name = name;
        }

        @Override
        public String toString() {
            return name;
        }

    }

AutoCompleteTextView tv = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
final ArrayList<Student> list = new ArrayList<MainActivity.Student>();
list.add(new Student("Viru"));
list.add(new Student("Gauti"));
ArrayAdapter<Student> adapter = new ArrayAdapter<MainActivity.Student>(
        this, android.R.layout.simple_dropdown_item_1line, list);
tv.setAdapter(adapter);

tv.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
            long arg3) {
        Student selected = (Student) arg0.getAdapter().getItem(arg2);
        Toast.makeText(MainActivity.this,
                "Clicked " + arg2 + " name: " + selected.name,
                Toast.LENGTH_SHORT).show();
    }
});

实现自定义适配器（通过扩展 BaseAdapter 类或 ArrayAdapter＆LT;学生＆GT; 类）检查此教程： http://www.ezzylearning.com/tutorial.aspx?tid=1763429

Implement a custom adapter (by extending BaseAdapter class or ArrayAdapter<Student> class) Check this tutorial : http://www.ezzylearning.com/tutorial.aspx?tid=1763429

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