在微调器中设置键和值

我有一个spiner,我想设置一个键和一个值,我使用HashMap,这是工作,但显示一行,像这样:

在这里输入图像说明

码:

final View rootView = inflater.inflate(R.layout.fragment_photos, container, false); Spinner spin=(Spinner)rootView.findViewById(R.id.spinner1); HashMap<Integer, String> P_Hash=new HashMap<Integer, String>(); Update Get_Information=new Update(rootView.getContext()); ArrayList<String> Province_NAME=new ArrayList<String>(); Province_NAME=Get_Information.GET_Province(); ArrayList<Integer> Province_ID=new ArrayList<Integer>(); Province_ID=Get_Information.Get_Province_ID(); for (int i = 0; i < Province_ID.size(); i++) { P_Hash.put(Province_ID.get(i), Province_NAME.get(i)); Log.d("Province_ID.get(i)", Province_ID.get(i)+""); Log.d(" Province_NAME.get(i)", Province_NAME.get(i)+""); } ArrayAdapter<HashMap<Integer, String>> adapter = new ArrayAdapter<HashMap<Integer,String>>(rootView.getContext(), android.R.layout.simple_spinner_item); adapter.add(P_Hash); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spin.setAdapter(adapter); 

Solutions Collecting From Web of "在微调器中设置键和值"

尝试使用HashMap存储键值对数据,并在您的案例微调项目索引作为关键省份ID作为价值 。 检查下面的例子获取更多细节。

准备好微调的价值

 String[] spinnerArray = new String[Province_ID.size()]; HashMap<Integer,String> spinnerMap = new HashMap<Integer, String>(); for (int i = 0; i < Province_ID.size(); i++) { spinnerMap.put(i,Province_ID.get(i)); spinnerArray[i] = Province_NAME.get(i); } 

为微调设置值

 ArrayAdapter<String> adapter =new ArrayAdapter<String>(context,android.R.layout.simple_spinner_item, spinnerArray); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); 

获得微调的价值

 String name = spinner.getSelectedItem().toString(); String id = spinnerMap.get(spinner.getSelectedItemPosition()); 

用钥匙和价值来填充微调的更好方法应该是:

第1步 :创buildPOJO类,将照顾的关键和价值

 public class Country { private String id; private String name; public Country(String id, String name) { this.id = id; this.name = name; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } //to display object as a string in spinner @Override public String toString() { return name; } @Override public boolean equals(Object obj) { if(obj instanceof Country){ Country c = (Country )obj; if(c.getName().equals(name) && c.getId()==id ) return true; } return false; } } 

注意: toString()方法很重要,因为它负责在微调器中显示数据,你可以根据需要修改toString()

步骤2 :准备要在微调器中加载的数据

  private void setData() { ArrayList<Country> countryList = new ArrayList<>(); //Add countries countryList.add(new Country("1", "India")); countryList.add(new Country("2", "USA")); countryList.add(new Country("3", "China")); countryList.add(new Country("4", "UK")); //fill data in spinner ArrayAdapter<Country> adapter = new ArrayAdapter<Country>(context, android.R.layout.simple_spinner_dropdown_item, countryList); spinner_country.setAdapter(adapter); spinner_country.setSelection(adapter.getPosition(myItem));//Optional to set the selected item. } 

第三步:最后得到所选项目的关键和值,在微调框中选中的监听方法

 spinner_country.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { Country country = (Country) parent.getSelectedItem(); Toast.makeText(context, "Country ID: "+country.getId()+", Country Name : "+country.getName(), Toast.LENGTH_SHORT).show(); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); 

一切顺利,快乐编码!