java 如何在微调器中设置 ID 和值
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How to Set ID And Value in spinner
提问by Jaipal Singh Dungarpur
I created a Data-Base table student which contains two fields like student_id and student_name. This table contains some data for student.
我创建了一个数据库表学生，其中包含两个字段，如 student_id 和 student_name。此表包含学生的一些数据。
My actual problem is I want to set ID and name of student in spinner like in html select tag, so when select spinner item I must get this ID to get another data from database.
My actual problem is I want to set ID and name of student in spinner like in html select tag, so when select spinner item I must get this ID to get another data from database.
回答by Android Killer
You can have two arraylist for name and id;
你可以有两个用于 name 和 id 的数组列表；
List<String> sIds = new ArrayList<String>();//add ids in this list
List<String> names = new ArrayList<String>();//add names in this list
Then you can retrive here inside spinner select. It will work even if two names are same in the spinner which may be the case:
然后你可以在微调器选择中检索这里。即使微调器中的两个名称相同，它也会工作，可能是这种情况：
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
int id = sIds.get(position);//This will be the student id.
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
回答by Tristan Wiley
Assuming I am reading your list correctly, if you want to set an Id to your Spinner programically just use..
假设我正确阅读了您的列表，如果您想以编程方式为 Spinner 设置 Id，只需使用..
mSpinner.setId(int)
In this code replace mSpinner with the reference to your Spinner and int with the desired Id
在此代码中，将 mSpinner 替换为对 Spinner 的引用，并将 int 替换为所需的 Id
回答by Skizo-oz??S
To add values into Spinner you can do it something like this Test
要将值添加到 Spinner，您可以执行以下操作： Test
public class Test extends Activity
{
ArrayList<String> InfoStudent = new ArrayList<String>();
ArrayList<String> IdStudent = new ArrayList<String>();
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Spinner spinner = (Spinner) findViewById(R.id.spinner1);
//Here you'll have to make a query to get ID and Name then with
InfoStudent.add("TheID" + "InfoStudentReturnedByQuery");
//TheID should go in IdStudent ArrayAdapter and InfoStudentReturnedByQuery should go in InfoStudent ArrayAdapter
// Then you create the arrayAdapter
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(Test.this
,android.R.layout.simple_spinner_item,difficultyLevelList);
// Set the Adapter
spinner.setAdapter(arrayAdapter);
If you want to know what spinner is selected you should do something like this :
如果您想知道选择了哪个微调器，您应该执行以下操作：
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> adapterView,
View view, int i, long l) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this,"You Selected : "
+ TheMainAdapterOfStudents.get(i)+" Student ",Toast.LENGTH_SHORT).show();
}
This only it's a guide how to, hope it helps :)
这只是一个指南，希望它有帮助:)
回答by Jeka Developer
1. Declare type Like:
1.声明类型喜欢：
public class Item
{
public long id;
public String name;
}
2. Fill spinner with data (Item[]):
2. 用数据填充微调器 (Item[])：
ArrayAdapter<DictionaryEntity> dataAdapter = new ArrayAdapter<DictionaryEntity>this,android.R.layout.simple_spinner_item, data);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
3. Get your id where you need it:
3. 在需要的地方获取您的 ID：
Item item = (Item)spinner.getSelectedItem();
return item.id;
