[英]How can I get values from a column based on selected month and year from spinner using SQLite in Android?
[英]How can I get selected “itemsid ” from spinner in Android?
当我从微调器中选择任何项目时,我会得到位置,即项目名称。 当我单击任何项目时,我需要此ItemId。 我能做什么?
我已经使用过改造。 我从Web服务获取数据列表。
List<Zone> zonelst=response.body().getZoneslist();
zonelst包含zid和zname。
我已经将“ items”(zname)加载到了微调器。 当我单击任何项目(zname)时,我需要itemsid(zid)。
for(int i=0; i<zonelst.size(); i++){
//Storing names to string array
items[i] = zonelst.get(i).getZname();
itemsid[i]=zonelst.get(i).getZid();
}
模型:
public class Zone {
@SerializedName("ZID")
private String zid;
@SerializedName("ZName")
private String zname;
public Zone(String zid, String zname) {
this.zid = zid;
this.zname = zname;
}
public String getZid() {
return zid;
}
public void setZid(String zid) {
this.zid = zid;
}
public String getZname() {
return zname;
}
public void setZname(String zname) {
this.zname = zname;
}
}
活动:
ZoneApiInterface apiService = OperatingApiClient.getClient()。create(ZoneApiInterface.class);
Call<ZoneApiResponse> call = apiService.getZoneInfoList();
call.enqueue(new Callback<ZoneApiResponse>() {
@Override
public void onResponse(Call<ZoneApiResponse> call, Response<ZoneApiResponse> response) {
List<Zone> zonelst=response.body().getZoneslist();
Log.d(TAG,"Number of Zone received1: "+zonelst.size());
//*********DROPDOWN******************************************************
//String array to store all the zone names
String[] items = new String[zonelst.size()];
String[] itemsid = new String[zonelst.size()];
//Traversing through the whole list to get all the names
for(int i=0; i<zonelst.size(); i++){
//Storing names to string array
items[i] = zonelst.get(i).getZname();
itemsid[i]=zonelst.get(i).getZid();
}
final Spinner spnrZone=(Spinner)findViewById(R.id.spinnerZone);
ArrayAdapter<String> adapter;
adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.support_simple_spinner_dropdown_item, items); //getApplication()
//setting adapter to spinner
spnrZone.setAdapter(adapter);
//Creating an array adapter for list view
spnrZone.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
int Hold = spnrZone.getSelectedItemPosition()+1;
Toast.makeText(getApplicationContext(), "Item Position is = "+Hold, Toast.LENGTH_SHORT).show();
String N=parent.getItemAtPosition(position).toString();
Toast.makeText(getApplicationContext(), "Item Name = "+N, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
@Override
public void onFailure(Call<ZoneApiResponse> call, Throwable t) {
// Log error here since request failed
Log.e(TAG,t.toString());
}
});
如果您希望保留原始代码,我将建议您给出此答案 。
但这不是经过优化的代码。
得到响应后,将所有zname和zid复制到占用额外空间和时间的数组(循环)。
我会建议另一种方法。
覆盖您的Zone
模型中的toString
方法。 将此添加到您的Zone
模型:
@Override
public String toString() {
return getZname();
}
在您的活动中:
Call<ZoneApiResponse> call = apiService.getZoneInfoList();
call.enqueue(new Callback<ZoneApiResponse>() {
@Override
public void onResponse(Call<ZoneApiResponse> call, Response<ZoneApiResponse> response) {
List<Zone> zonelst=response.body().getZoneslist();
Log.d(TAG,"Number of Zone received1: "+zonelst.size());
//*********DROPDOWN******************************************************
final Spinner spnrZone=(Spinner)findViewById(R.id.spinnerZone);
ArrayAdapter<Zone> adapter;
adapter = new ArrayAdapter<Zone>(getApplicationContext(), R.layout.simple_selectable_list_item,zonelst); //getApplication()
//setting adapter to spinner
spnrZone.setAdapter(adapter);
//Creating an array adapter for list view
spnrZone.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Zone z = (Zone) parent.getItemAtPosition(position);
int Hold = spnrZone.getSelectedItemPosition()+1;
Toast.makeText(getApplicationContext(), "Item Position is = "+Hold, Toast.LENGTH_SHORT).show();
String N = z.getZname();
String zid = z.getZid();
Toast.makeText(getApplicationContext(), "Item Name = "+N+",Item ID = "+zid, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
@Override
public void onFailure(Call<ZoneApiResponse> call, Throwable t) {
// Log error here since request failed
Log.e(TAG,t.toString());
}
});
spnrZone.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
int Hold = spnrZone.getSelectedItemPosition()+1;
Toast.makeText(getApplicationContext(), "Item Position is = "+Hold, Toast.LENGTH_SHORT).show();
String N=parent.getItemAtPosition(position).toString();
Toast.makeText(getApplicationContext(), "Item Name = "+N, Toast.LENGTH_SHORT).show();
String id=itemsid[position]; //simply get its id (String or int use whatev er its type)
}
使用itemsid[position];
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