传递参数在Android的微调器 [英] Passing a parameter to spinner in android
本文介绍了传递参数在Android的微调器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有2个纺纱和第一装载值，从JSON响应第一微调。然后选择从1微调1微调，然后选择值的值将被发送到一个方法调用另一个方法 getFilteredDescriptions（），它返回一个ArrayList的（）称为 resultDescription 。我想将其设置为输入到第2微调。
我分配到第二微调值 resultDescription ，但因为我已经初始化或声明我没有在正确的方式来完成。谁能告诉我该怎么办呢？任何帮助将AP preciated。
@覆盖
公共无效onTaskCompleted（JSONArray responseJson）{ 尝试{
清单＆LT;串GT;地壳=新的ArrayList＆LT;串GT;（）;
最终名单＆LT;串GT;说明=新的ArrayList＆LT;串GT;（）; 的for（int i = 0; I＆LT; responseJson.length（）; ++ I）{
的JSONObject对象= responseJson.getJSONObject（I） 如果（（object.getString（MainCategoryID））。等于（1））{
Log.i（描述，object.getString（描述））;
descriptionHalf.add（object.getString（描述））;
JSONArray subMenuArray =对象
.getJSONArray（SubMenuEntity）;
为（中间体J = 0; J＆下; subMenuArray.length（）; ++ j）条{
JSONObject的subMenuObject = subMenuArray
.getJSONObject（J）;
Log.i（壳，subMenuObject.getString（壳））;
crust.add（subMenuObject.getString（壳））; Log.i（描述，
subMenuObject.getString（描述））;
description.add（subMenuObject.getString（描述））;
Log.i（描述，
subMenuObject.getString（描述））;
} } crustSP =（微调）findViewById（R.id.sp_crust）;
sizeSP =（微调）findViewById（R.id.sp_pizza_size）; 地壳= Utils.removeDuplicatesFromList（外壳）;
ArrayAdapter＆LT;串GT; dataAdapterCru =新ArrayAdapter＆LT;串GT;（
对此，android.R.layout.simple_spinner_item，外壳）;
dataAdapterCru
.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
crustSP.setAdapter（dataAdapterCru）;
crustSP.setOnItemSelectedListener（新OnItemSelectedListener（）{ 公共无效onNothingSelected（适配器视图＆LT;＆GT;为arg0）{
} @覆盖
公共无效onItemSelected（适配器视图＆LT;＆GT;母公司，
查看查看，INT位置，长的id）{ 字符串crustSelectedItem = crustSP.getSelectedItem（）
的ToString（）; getFilteredDescriptions（crustSelectedItem，说明）; }
}）; ArrayAdapter＆LT;串GT; dataAdapterDes =新ArrayAdapter＆LT;串GT;（
对此，android.R.layout.simple_spinner_item，resultDescription）; // resultDescription不能被解析为一个变量
dataAdapterDes
.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
sizeSP.setAdapter（dataAdapterDes）;
sizeSP.setAdapter（新NothingSelectedSpinnerAdapter（
dataAdapterDes，
R.layout.contact_spinner_row_nothing_selected，此））;
sizeSP.setOnItemSelectedListener（新OnItemSelectedListener（）{ 公共无效onNothingSelected（适配器视图＆LT;＆GT;为arg0）{
} @覆盖
公共无效onItemSelected（适配器视图＆LT;＆GT;母公司，
查看查看，INT位置，长的id）{ }
}）; }
}赶上（JSONException E）{
e.printStackTrace（）;
}}清单＆LT;串GT; getFilteredDescriptions（字符串crustSelectedItem，
清单＆LT;串GT;说明）{
清单＆LT;串GT; resultDescription =新的ArrayList＆LT;串GT;（）;
。crustSelectedItem = crustSP.getSelectedItem（）的toString（）; 如果（说明== NULL || description.isEmpty（））
返回resultDescription; 的for（int i = 0; I＆LT; description.size（）;我++）{
说明= Utils.removeDuplicatesFromList（介绍）;
如果（！description.get（I）。载有（crustSelectedItem））
继续; resultDescription.add（description.get（I））; } 返回resultDescription; //发送这个上面dataAdapterDes适配器}
解决方案
您code看起来像下面。
@覆盖
公共无效onTaskCompleted（JSONArray responseJson）{ 尝试{
清单＆LT;串GT;地壳=新的ArrayList＆LT;串GT;（）;
最终名单＆LT;串GT;说明=新的ArrayList＆LT;串GT;（）; 的for（int i = 0; I＆LT; responseJson.length（）; ++ I）{
的JSONObject对象= responseJson.getJSONObject（I） 如果（（object.getString（MainCategoryID））。等于（1））{
Log.i（描述，object.getString（描述））;
descriptionHalf.add（object.getString（描述））;
JSONArray subMenuArray =对象
.getJSONArray（SubMenuEntity）;
为（中间体J = 0; J＆下; subMenuArray.length（）; ++ j）条{
JSONObject的subMenuObject = subMenuArray
.getJSONObject（J）;
Log.i（壳，subMenuObject.getString（壳））;
crust.add（subMenuObject.getString（壳））; Log.i（描述，
subMenuObject.getString（描述））;
description.add（subMenuObject.getString（描述））;
Log.i（描述，
subMenuObject.getString（描述））;
} } crustSP =（微调）findViewById（R.id.sp_crust）;
sizeSP =（微调）findViewById（R.id.sp_pizza_size）; 地壳= Utils.removeDuplicatesFromList（外壳）;
ArrayAdapter＆LT;串GT; dataAdapterCru =新ArrayAdapter＆LT;串GT;（
对此，android.R.layout.simple_spinner_item，外壳）;
dataAdapterCru
.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
crustSP.setAdapter（dataAdapterCru）;
crustSP.setOnItemSelectedListener（新OnItemSelectedListener（）{ 公共无效onNothingSelected（适配器视图＆LT;＆GT;为arg0）{
} @覆盖
公共无效onItemSelected（适配器视图＆LT;＆GT;母公司，
查看查看，INT位置，长的id）{ 字符串crustSelectedItem = crustSP.getSelectedItem（）
的ToString（）; 清单＆LT;串GT; resultDescription = getFilteredDescriptions（crustSelectedItem，说明）;
ArrayAdapter＆LT;串GT; dataAdapterDes =新ArrayAdapter＆LT;串GT;（
对此，android.R.layout.simple_spinner_item，resultDescription）; // resultDescription不能被解析为一个变量
dataAdapterDes
.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
sizeSP.setAdapter（dataAdapterDes）;
sizeSP.setAdapter（新NothingSelectedSpinnerAdapter（
dataAdapterDes，
R.layout.contact_spinner_row_nothing_selected，此））;
}
}）;
sizeSP.setOnItemSelectedListener（新OnItemSelectedListener（）{ 公共无效onNothingSelected（适配器视图＆LT;＆GT;为arg0）{
} @覆盖
公共无效onItemSelected（适配器视图＆LT;＆GT;母公司，
查看查看，INT位置，长的id）{ }
}）; }
}赶上（JSONException E）{
e.printStackTrace（）;
}}
学习一些基本的编码为好。取而代之的这个使用活动/ Class_Name.this
I have 2 spinners and first loading the values to the 1st spinner from the json response. Then select a value from 1st spinner then selected value from 1st spinner will be send to a method another method called getFilteredDescriptions() and it returns a ArrayList() called resultDescription. I want to set it as the input to the 2nd spinner.
I have assign the value resultDescription to the 2nd spinner but I haven't done in correct way because I have initialized or declare. Can anyone tell me how to do it? Any help will be appreciated.
@Override
public void onTaskCompleted(JSONArray responseJson) {
try {
List<String> crust = new ArrayList<String>();
final List<String> description = new ArrayList<String>();
for (int i = 0; i < responseJson.length(); ++i) {
JSONObject object = responseJson.getJSONObject(i);
if ((object.getString("MainCategoryID")).equals("1")) {
Log.i("Description ", object.getString("Description"));
descriptionHalf.add(object.getString("Description"));
JSONArray subMenuArray = object
.getJSONArray("SubMenuEntity");
for (int j = 0; j < subMenuArray.length(); ++j) {
JSONObject subMenuObject = subMenuArray
.getJSONObject(j);
Log.i("Crust", subMenuObject.getString("Crust"));
crust.add(subMenuObject.getString("Crust"));
Log.i("Description",
subMenuObject.getString("Description"));
description.add(subMenuObject.getString("Description"));
Log.i("Description",
subMenuObject.getString("Description"));
}
}
crustSP = (Spinner) findViewById(R.id.sp_crust);
sizeSP = (Spinner) findViewById(R.id.sp_pizza_size);
crust = Utils.removeDuplicatesFromList(crust);
ArrayAdapter<String> dataAdapterCru = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, crust);
dataAdapterCru
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
crustSP.setAdapter(dataAdapterCru);
crustSP.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onNothingSelected(AdapterView<?> arg0) {
}
@Override
public void onItemSelected(AdapterView<?> parent,
View view, int position, long id) {
String crustSelectedItem = crustSP.getSelectedItem()
.toString();
getFilteredDescriptions(crustSelectedItem, description);
}
});
ArrayAdapter<String> dataAdapterDes = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, resultDescription); //resultDescription cannot be resolved to a variable
dataAdapterDes
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sizeSP.setAdapter(dataAdapterDes);
sizeSP.setAdapter(new NothingSelectedSpinnerAdapter(
dataAdapterDes,
R.layout.contact_spinner_row_nothing_selected, this));
sizeSP.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onNothingSelected(AdapterView<?> arg0) {
}
@Override
public void onItemSelected(AdapterView<?> parent,
View view, int position, long id) {
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
List<String> getFilteredDescriptions(String crustSelectedItem,
List<String> description) {
List<String> resultDescription = new ArrayList<String>();
crustSelectedItem = crustSP.getSelectedItem().toString();
if (description == null || description.isEmpty())
return resultDescription;
for (int i = 0; i < description.size(); i++) {
description = Utils.removeDuplicatesFromList(description);
if (!description.get(i).contains(crustSelectedItem))
continue;
resultDescription.add(description.get(i));
}
return resultDescription; //send this above dataAdapterDes Adapter
}
解决方案
your code will look like below.
@Override
public void onTaskCompleted(JSONArray responseJson) {
try {
List<String> crust = new ArrayList<String>();
final List<String> description = new ArrayList<String>();
for (int i = 0; i < responseJson.length(); ++i) {
JSONObject object = responseJson.getJSONObject(i);
if ((object.getString("MainCategoryID")).equals("1")) {
Log.i("Description ", object.getString("Description"));
descriptionHalf.add(object.getString("Description"));
JSONArray subMenuArray = object
.getJSONArray("SubMenuEntity");
for (int j = 0; j < subMenuArray.length(); ++j) {
JSONObject subMenuObject = subMenuArray
.getJSONObject(j);
Log.i("Crust", subMenuObject.getString("Crust"));
crust.add(subMenuObject.getString("Crust"));
Log.i("Description",
subMenuObject.getString("Description"));
description.add(subMenuObject.getString("Description"));
Log.i("Description",
subMenuObject.getString("Description"));
}
}
crustSP = (Spinner) findViewById(R.id.sp_crust);
sizeSP = (Spinner) findViewById(R.id.sp_pizza_size);
crust = Utils.removeDuplicatesFromList(crust);
ArrayAdapter<String> dataAdapterCru = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, crust);
dataAdapterCru
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
crustSP.setAdapter(dataAdapterCru);
crustSP.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onNothingSelected(AdapterView<?> arg0) {
}
@Override
public void onItemSelected(AdapterView<?> parent,
View view, int position, long id) {
String crustSelectedItem = crustSP.getSelectedItem()
.toString();
List<String> resultDescription = getFilteredDescriptions(crustSelectedItem, description);
ArrayAdapter<String> dataAdapterDes = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, resultDescription); //resultDescription cannot be resolved to a variable
dataAdapterDes
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sizeSP.setAdapter(dataAdapterDes);
sizeSP.setAdapter(new NothingSelectedSpinnerAdapter(
dataAdapterDes,
R.layout.contact_spinner_row_nothing_selected, this));
}
});
sizeSP.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onNothingSelected(AdapterView<?> arg0) {
}
@Override
public void onItemSelected(AdapterView<?> parent,
View view, int position, long id) {
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
learn some basic coding as well. Instead of this use Activity/Class_Name.this
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