我正在从在线XML Web URL中获取数据并成功获取数据。我正在使用 hashmap键和值 ...而我得到的键和值如下所示，这在我的LOGCAT-
{
Jackfruit=[Cabbage, Kesar, Amond],
Date=[van, hall, Brinjal],
Amond=[hall, van, Brinjal]
}
1. 。当我第一次启动android应用程序时，Spinner和spinner2被正确地填充在spinner中，所有数据都被正确填充，但是在spinner2中，所有键值都显示了...但是它应该仅显示spinner1中显示的键值。
2. 当我更改spinner1键值时，两个微调器中的列表项均正确显示，然后所有下拉列表均显示正确的值。
3. 当我单击spinner2值时，它充当键并开始在spinner中显示is值，而应放置我单击的值。
我在记事本中草绘了一下问题
{
Jackfruit=[Cabbage, Kesar, Amond],
Date=[van, hall, Brinjal],
Amond=[hall, van, Brinjal]
}
我的代码如下
MainActivity.java
@SuppressLint("NewApi")
public class MainActivity extends Activity implements AdapterView.OnItemSelectedListener, OnClickListener {
ArrayList<String> title;
ArrayList<String> title2;
Button button;
Spinner spinner;
Spinner spinner2;
private EditText FromFruitsDateEtxt;
//private EditText toDateEtxt;
private DatePickerDialog FromFruitsDatePickerDialog;
//private DatePickerDialog toDatePickerDialog;
private SimpleDateFormat dateFormatter;
ArrayAdapter<String> FromFruits_adapter;
ArrayAdapter<String> FromFruits_adapter2;
Map<String, List<String>> values = new HashMap<String, List<String>>();
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
title = new ArrayList<String>();
title2 = new ArrayList<String>();
button = (Button) findViewById(R.id.button1);
spinner = (Spinner) findViewById(R.id.spinner1);
spinner.setOnItemSelectedListener(this);
spinner2 = (Spinner) findViewById(R.id.spinner2);
spinner2.setOnItemSelectedListener(this);
dateFormatter = new SimpleDateFormat("dd-MM-yyyy", Locale.US);
findViewsById();
setDateTimeField();
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
parse();
FromFruits_adapter=new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_spinner_item, title);
FromFruits_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
FromFruits_adapter2 = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_spinner_item, title2);
FromFruits_adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(FromFruits_adapter);
FromFruits_adapter2.clear();
FromFruits_adapter2.notifyDataSetChanged();
spinner2.setAdapter(FromFruits_adapter2);
}
private Object FromFruits_adapter(int i) {
// TODO Auto-generated method stub
return null;
}
});
}
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
String lang_Name = parent.getItemAtPosition(pos).toString();
List<String> lang_Key = values.get(lang_Name);
FromFruits_adapter2.clear();
for(String s : lang_Key){
FromFruits_adapter2.insert(s, FromFruits_adapter2.getCount());
}
FromFruits_adapter2.notifyDataSetChanged();
Toast.makeText(parent.getContext(), ""+lang_Key,
Toast.LENGTH_LONG).show();
}
public void onNothingSelected(AdapterView<?> arg0) {
}
protected void parse() {
try {
URL url = new URL("web url www.xyz.xml");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(url.openStream()));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("Fruits");
for (int i = 0; i < nodeList.getLength(); i++) {
Element el = (Element) nodeList.item(i);
// get the a:W value
String awValue = el.getElementsByTagName("FromFruits").item(0).getTextContent();
// add the above value in our map as key if it isn't present in the map, this key will
// have a list associated with it in which ALL the values for a:R will be stored, if
// the awValue key is present then you just add the new a:R value to its list
if (!values.containsKey(awValue)) {
values.put(awValue, new ArrayList<String>());
}
// also add the value pointed by a:R to the list associated with a:W
String arValue = el.getElementsByTagName("ToFruits").item(0).getTextContent();
values.get(awValue).add(arValue);
// Log.d("ADebugTag", "Value: " + arValue);
}
Log.d("ADebugTag", "Value: " + values);
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("FromFruits");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
NodeList websiteList = fstElmnt.getElementsByTagName("ToFruits");
Element websiteElement = (Element) websiteList.item(0);
websiteList = websiteElement.getChildNodes();
title.add(((Node) nameList.item(0)).getNodeValue());
}
NodeList nodeList2 = doc.getElementsByTagName("Fruits");
for (int i = 0; i < nodeList2.getLength(); i++) {
Node node = nodeList2.item(i);
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("ToFruits");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
title2.add(((Node) nameList.item(0)).getNodeValue());
}
Set<String> set = new LinkedHashSet<String>(title);
title = new ArrayList<String>(set);
// Collection<String> set = new LinkedHashSet<String>(months);
Set<String> set2 = new LinkedHashSet<String>(title2);
title2 = new ArrayList<String>(set2);
System.out.println("list are");
System.out.println(set);
System.out.println("list 2 are");
System.out.println(set2);
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
}
@Override
public void onClick(View view) {
if(view == FromFruitsDateEtxt) {
FromFruitsDatePickerDialog.show();
} else {
Log.d("errorrrr", "soryy");
}
}
}
可以在素描中看到问题
最佳答案
我自己和我的一个 friend Ricardo Barroca从stackoverflow解决了这个问题
看到我的评论陈述
spinner.setOnItemSelectedListener(this);
spinner2 = (Spinner) findViewById(R.id.spinner2);
//spinner2.setOnItemSelectedListener(this);
这解决了我的spinner2点击问题，该问题是获取值而不是将自身设置为spinner。
并从下面的代码中清除了预先填充的值到spinner1和spinner2
from_adapter=new ArrayAdapter<String>(getBaseContext(),android.R.layout.simple_spinner_item, title);
from_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
title2.clear();
from_adapter2=new ArrayAdapter<String>(getBaseContext(),android.R.layout.simple_spinner_item, title2);
from_adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(from_adapter);
//from_adapter2.clear();
//from_adapter2.notifyDataSetChanged();
spinner2.setAdapter(from_adapter2);