将 Android AutoCompleteTextView 与 ArrayAdapter<Objects> 结合使用而不是 ArrayAdapter<Strings> [英] Using Android AutoCompleteTextView with ArrayAdapter<Objects> instead of ArrayAdapter<Strings>
问题描述
我想在我的 android 应用程序中使用 AutoCompleteTextView.我知道如何将它与简单的字符串数组一起使用,但我希望 AutoCompleteTextView 使用对象列表来执行完成.我的代码如下:
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:
活动代码
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
}
Student 类对象具有关于ID,NAME,ADDRESS,MARKS
的学生的信息.
Student class Object has information regarding a student which is ID,NAME,ADDRESS,MARKS
.
我知道 AutoCompleteTextView 需要一个 String 类型对象的数组来执行搜索操作.在我的情况下,我希望 AutoCompleteTextView 使用我的 ArrayList 根据 Student 对象字段 NAME 执行完成.我不知道我应该如何指定 AutoCompleteTextView 使用Student 对象的 NAME 字段.请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.
谢谢
推荐答案
两种方式:
覆盖
Student
类中的toString()
并使其返回name
.您可以使用以下代码获取选择的对象:
Override
toString()
inStudent
class and make it returnname
. 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
类)查看本教程: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
这篇关于将 Android AutoCompleteTextView 与 ArrayAdapter<Objects> 结合使用而不是 ArrayAdapter<Strings>的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!