安卓:如何从Spinner中获取所选项目的ID?
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在我的例子中,我想从Spinner中获取所选项目的Id。我的模态类有两个字段,分别是id和name。我列出了所有的数据,并将这个列表设置为适配器。我试着用getSelectedItem()方法来获取selectedItem的Id。但我只能得到列表中第一个项目的id。
这是我的代码。
public class ModifyEventFragment extends DialogFragment
Context context;
CalEvent eve;
Project proj;
Spinner eventType,stage;
public static String eid,pid,type;
public static List<EventType> event_type;
public static List<ProjectStatus> cust_stage;
EditText where,when,who,notes;
String eve_type,stage_val,when_val,who_val,notes_val;
String modified_where,modified_who,modified_when,modified_notes;
public ModifyEventFragment(Project proj)
this.proj=proj;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
View rootView = inflater.inflate(R.layout.modify_project_event, container,
false);
context = rootView.getContext();
eventType = (Spinner) rootView.findViewById(R.id.modifyEventType);
stage =(Spinner) rootView.findViewById(R.id.modifyStage);
where = (EditText)rootView.findViewById(R.id.modifyWhere);
who = (EditText)rootView.findViewById(R.id.modifyWho);
when = (EditText)rootView.findViewById(R.id.modifyWhen);
notes =(EditText) rootView.findViewById(R.id.modifyNotes);
eve = CalEvent.getCalEvent(ProjectEventFragment.calevent.eve_id);
event_type = EventType.listAll();
CustomEventTypeAdapter adapter = new CustomEventTypeAdapter(context, event_type);
eventType.setAdapter(adapter);
type=((EventType)eventType.getSelectedItem()).et_id;
cust_stage = ProjectStatus.listAll();
CustomStatusAdapter adapter1 = new CustomStatusAdapter(context, cust_stage);
stage.setAdapter(adapter1);
where.setText(eve.followup_location.toString());
where.addTextChangedListener(new TextWatcher()
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
// TODO Auto-generated method stub
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after)
// TODO Auto-generated method stub
@Override
public void afterTextChanged(Editable s)
// TODO Auto-generated method stub
modified_where = s.toString();
);
who.setText(eve.person_met.toString());
who.addTextChangedListener(new TextWatcher()
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
// TODO Auto-generated method stub
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after)
// TODO Auto-generated method stub
@Override
public void afterTextChanged(Editable s)
// TODO Auto-generated method stub
modified_who = s.toString();
);
when.setText(eve.event_start.toString());
when.addTextChangedListener(new TextWatcher()
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
// TODO Auto-generated method stub
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after)
// TODO Auto-generated method stub
@Override
public void afterTextChanged(Editable s)
// TODO Auto-generated method stub
modified_when = s.toString();
);
notes.setText(eve.notes.toString());
notes.addTextChangedListener(new TextWatcher()
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
// TODO Auto-generated method stub
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after)
// TODO Auto-generated method stub
@Override
public void afterTextChanged(Editable s)
// TODO Auto-generated method stub
modified_notes = s.toString();
);
Button save = (Button) rootView.findViewById(R.id.modifyeventsave);
save.setOnClickListener(new OnClickListener()
@Override
public void onClick(View v)
// TODO Auto-generated method stub
eve.followup_location = modified_where;
eve.event_start = modified_when;
eve.person_met = modified_who;
eve.notes = modified_notes;
System.out.println("print type"+type);
eve.save();
ProjectEventFragment.adapter.notifyDataSetChanged();
);
return rootView;
这是CustomEventType适配器的代码。
public class CustomEventTypeAdapter extends BaseAdapter
Context ctx;
List<EventType> ps;
LayoutInflater inflater;
public CustomEventTypeAdapter(Context ctx,List<EventType> ps)
this.ctx=ctx;
this.ps=ps;
inflater = (LayoutInflater) ctx
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
@Override
public int getCount()
// TODO Auto-generated method stub
return ps.size();
@Override
public EventType getItem(int position)
// TODO Auto-generated method stub
return ps.get(position);
@Override
public long getItemId(int position)
// TODO Auto-generated method stub
return ps.get(position).getId();
@Override
public View getView(int position, View convertView, ViewGroup parent)
View rowView = convertView;
if (convertView == null)
rowView = inflater.inflate(R.layout.spinner_item_local, parent,
false);
TextView textView = (TextView) rowView.findViewById(R.id.spinner_item_text);
EventType proj = getItem(position);
try
textView.setText(proj.name);
catch (Exception e)
return rowView;
谁能帮我解决这个问题?
答案
使用position.Location从适配器列表持有人中获取所选项目数据。
eventType.setOnItemSelectedListener(new OnItemSelectedListener()
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
String id = event_type.get(position).getId();
@Override
public void onNothingSelected(AdapterView<?> arg0)
);
另一答案
分享从我的类中获取所选项目id的示例代码--。
spinner1 .setOnItemSelectedListener(new OnItemSelectedListener()
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
// TODO Auto-generated method stub
spinner1 = parent.getItemAtPosition(position).toString();
count = position; //this would give you the id of the selected item
@Override
public void onNothingSelected(AdapterView<?> arg0)
// TODO Auto-generated method stub
);
干杯 :)
另一答案
在你的微调器上使用view.OnItemSelectedListener,你会得到一个int的位置,你可以用它来作为你所选项目的id。
另一答案
你有一个 ProjectStatus
豆。现在 Override
办法 String toString()
在其中。
public class ProjectStatus
private Integer id; // Long, String any type
private String name;
// more properties if you need
@Override // Mandatory
public String toString()
return name; // name + " ("+id+")"; // can also be returned
// Getter & Setter
然后让 ArrayAdapter<ProjectStatus>
并将其置于 Spinner
用状态选项加载Spinner。
//Task 1.
List<ProjectStatus> cust_stages = ProjectStatus.listAll(); // Or using any JSON Data OR API call;
//Task 2.
ArrayAdapter<ProjectStatus> statusAdapter = new ArrayAdapter<ProjectStatus>(
this, android.R.layout.simple_spinner_item, cust_stages
);
statusAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//Task 3.
Spinner stage =(Spinner) rootView.findViewById(R.id.modifyStage);
stage.setAdapter(statusAdapter);
现在得到选择 ProjectStatus
和它的属性在任何 Click/Change Event
喜欢下面...
// In any OnClick / OnSelect event
ProjectStatus selectedStatus = (ProjectStatus) stage.getSelectedItem();
Integer statusId = selectedStatus.getId();
String statusName = selectedStatus.getName();
// and if you have more properties
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