Hello I am parsing some json on android and I have been able to put the json parsed data into a listview. However on my listview, I also have some icons that I would like to set the status according to the parsed data ( I have some keys that define their status, 1 for enabled and 0 for disabled). I can't seem to put this on the HashMap, anyone has any tip/information?
Thanks
HashMap<String,Boolean> map = new HashMap<String,Boolean>();
Collection c = map.values();
Iterator itr = c.iterator();
while(itr.hasNext())
System.out.println(itr.next());
}
Related
I am displaying list of check-boxes in horizontal RecyclerView.
It display values such as {"Rd" , "Gr" , "Yl"} but when user selects any of this value it should return {"RED" , "GREEN" , "YELLOW")
How can I bind these two value that show and return differently?
I am taking display values from R.string-arry
I created another string-array of actual values, and when user checked any of checkboxes I get that ID and replaced it with actual values.
For e.g. If user has selected "Gr" I get ID=1 then replaced with actual string-array
But this only works when code-color and original-color are in order. In my app I sometimes use Red,green,blue or sometimes green,yellow,blue. So, this won't help me.
From what I understood, you need a mapping between GR and Green, RD and Red etc.
You can try using a Hashmap.
HashMap<String,String> colourMap = new HashMap<>();
colourMap.put("GR","GREEN");
colourMap.put("RD","RED");
And then you can retrieve the respective value for your colour code:
String colour = colourMap.get("GR");
You can use a HashMap which will bind the two arrays as key value pair
public HashMap<String,String> bindColors() {
HashMap<String,String> map = new HashMap<>();
int length = orginalColors.length;
for (int i = 0; i < length; i++) {
map.put(orginalColors[i], codeColors[i]);
}
return map;
}
And for getting the Colors in code.
HashMap<String, String> keyPair = bindColors();
orginalColorsNewArray = keyPair.keySet().toArray(new String[keyPair.keySet().size()]);
codeColorsNewArray = keyPair.values().toArray(new String[keyPair.values().size()]);
or use .get() function
keyPair.get("YELLOW")
Now it will be easier for you to access the codes by id/position
Hope this helps.
I have the following code. I added my text fields dynamically. My desired result shown in Genymotion 5.0 (Google Nexus 5) but when I run my app in other devices/actual device the textfields get shuffled. Please help, Thanks in advance.
JSONObject jsonObject = new JSONObject(question.getSublabels());
final EditText[] editTextSublabels = new EditText[jsonObject.length()];
for (int i = 0; i < jsonObject.length(); i++) {
String names = jsonObject.names().get(i).toString();
editTextSublabels[i] = (EditText) LayoutInflater.from(activity).inflate(R.layout.sublabels, null);
editTextSublabels[i].setId(i);
editTextSublabels[i].setHint(jsonObject.getString(names));
sublabelsContainers.addView(editTextSublabels[i], params);
}
You cannot and should not rely on the ordering of elements within a JSON object.
In JSON, an object is defined thus:
An object is an unordered set of name/value pairs.
If you want order to be preserved, you need to redefine your data structure or put it inside a jsonarray
see http://www.json.org.
A JSONObject is a type of map. It does not preserve ordering. If you want to preserve ordering using JSON, you will need to use an array (and matching JSONArray in Java).
It's been a while and i'm trying to ignore some frustrating issue i'm having with json things in java, i'm new to this and read alot however, parsing json in javascript or php was alot better (or easier i dunno) but now in java i cannot convert a jsonobject to jsonarray if it doesn't have a parent, cuz it uses .getJsonArray('array)
BUT what IF i have this :
{"49588":"1.4 TB","49589":"1.4 TB MultiAir","49590":"1.4 TB MultiAir TCT","49591":"1.6L MultiJet","49592":"1750 Tbi","49593":"2.0L MultiJet","49594":"2.0L MultiJet TCT"}
i'm not succeeding in anyway to convert it to array
what i want is to convert this JSONObject to JSONArray loop within its items and add them to a Spinner, now that's the first issue, the second question is: if i convert this to JSONArray how can i add the ID, Text to the spinner? just like the HTML Select tag
<option value="0">Item 1</option>
so it's an issue and a question hope someone can find the solution for this jsonarray thing, without modifying the json output from the website, knowing that if i modify and add a parent to this json, the JSONArray will work. but i want to find the solution for that.
Nothing special i have in the code:
Just a AsynTask Response, a log which is showing the json output i put at the beginning of this question
Log.d("response", "res " + response);
// This will work
jsonCarsTrim = new JSONObject(response);
// This won't work
JSONArray jdata = new JSONArray(response);
Thanks !
How about this:
JSONObject json = new JSONObject(yourObject);
Iterator itr = json.keys();
ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
ArrayList<Integer> links = new ArrayList<Integer>();
int i = 0;
while(itr.hasNext()) {
String key = itr.next().toString();
links.add(i,Integer.parseInt(key));
entries.add(i, (CharSequence) json.getString(key)); //for example
i++;
}
//this is the activity
entriesAdapter = new ArrayAdapter<CharSequence>(this,
R.layout.support_simple_spinner_dropdown_item, entries);
//spinner is the spinner the data is added too
spinner.setAdapter(entriesAdapter);
this should work (works for me), you may have to modify the code.
The way shown, i am adding all entries of the json object into a Spinner, where my json key is the index value and the linked String value of the json object will be shown as Spinner entry (title) in my activity.
Now when an Item is selected, fetch the SelectedItemPosition and you can look it up in the "links" array list, to get the real value.
I'm not sure if this is thing you want but give it a try. There is tutorial to convert the Json to Map. After you convert it, you can iterate through the map.
http://www.mkyong.com/java/how-to-convert-java-map-to-from-json-jackson/
What you have is a JSON object type, not an array type. To iterate you can get the Iterator from the keys method.
I'm trying to implement an expandable listview with data coming from a database. I've already tried having the data added within the codes and it works so I'm now trying to have dynamic data from the database populate the listview.
The data is grouped in two, the main category and the member. For example if the main category is fruit, it's members may include mango, avocado, apples, etc. If animals, it may have horses, eagle, shark. The data always comes in pairs such as Animal, Horses; Animal, Eagle; Fruit, Apples. The expandable listview should appear as:
Animal
-- Horses
-- Eagle
Fruit
-- Apples
My code below can already determine the main group so the headers already display the main groupings of Fruit and Animal. By using
group_member.put(family_name, member_name);
I linked the member to the main category. My problem now is how to code for the iteration to group the members to the main category. So far I've already tried using iterator based on the sample codes given here in stackoverflow and from other sites however only the last elements of each group is display. I've also tried using the for-each loop bur still no success.
String json = jsonParser.makeHttpRequest(URL_COMPONENTS, "POST", params);
JSONArray components = null;
ArrayList<HashMap<String, String>> componentList;
List<String> main_group = new ArrayList<String>();
HashMap<String, String> group_member = new HashMap<String, String>();
try {
components = new JSONArray(json);
if (components != null) {
for (int i = 0; i < components.length(); i++) {
JSONObject c = components.getJSONObject(i);
String family_name = c.getString(TAG_FAMILY_NAME);
String member_name = c.getString(TAG_MEMBER_NAME);
main_group.add(family_name);
group_member.put(family_name, member_name);
if (!listDataHeader.contains(main_group))
listDataHeader.add(main_group);
componentList.add(group_member);
}
}
}
Please help. Thanks in advance!
If you're using HashMap you can't have a key more than once in your list. Each key must be unique.
This could be a solution:
HashMap<String, ArrayList<String>> group_member = new HashMap<String, ArrayList<String>>();
... using the Hashmap as a directory and the key is returning an Arraylist of the family members.
Im using hashmap and arraylist...
How to sort the arraylist ? eg) In hashmap values are in order like one,two,three,four,five
but i stored these values in arraylist the order changed like three,one,five,two,four
In my code groupList,gnamelist and newList are all arraylist...
In print sts PLACES are in correct order but while print on NEWLIST PLACES the order changed
How to sort this in order?
My code
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_PLACE, gname);
map.put(TAG_HOTEL,lname);
// adding HashList to ArrayList
groupList.add(map);
gnamelist.add(gname);
System.out.println("PLACES" + gnamelist);
List<String> newList = new ArrayList<String>(new LinkedHashSet<String>(gnamelist));
Collections.sort(newList,Collections.reverseOrder());
System.out.println("NEWLIST PLACES" + newList);
HashSet will store elements in an unordered fashion, and is likely the culprit of your element reordering.
List<String> newList = new ArrayList<String>(new HashSet<String>(gnamelist));
Also consider using LinkedHashMap/LinkedHashSet, which preserves the ordering of elements added to it.
Alternatively try the following:
gnamelist.add(gname);
System.out.println("PLACES" + gnamelist);
List<String> newList = new ArrayList<String>();
newList.addAll(gnamelist);
Try
Collections.sort(newList);
Edit:
If you want to sort in reverse use this
Collections.sort(newList,Collections.reverseOrder());
Important:
if you want to preserve insertion order, you need to use TreeSet instead of HashSet as HashSet doesn't preserve insertion order