I need to fetch two arrays from a json response
Here is my response.
{
"data": [
{
"sub_cat": [
{
"id": "770",
"cat_id": "14",
"sub_category": "Pan America"
},
{
"id": "771",
"cat_id": "14",
"sub_category": "John Players"
}
],
"id": "14",
"cat_id": "x",
"category": "Casual shirts"
},
{
"sub_cat": [
{
"id": "770",
"cat_id": "14",
"sub_category": "Pan America"
},
{
"id": "771",
"cat_id": "14",
"sub_category": "John Players"
},
{
"id": "835",
"cat_id": "15",
"sub_category": "Roadster"
},
{
"id": "836",
"cat_id": "15",
"sub_category": "wildcraft"
}
],
"id": "15",
"cat_id": "x",
"category": "Jackets"
},
{
"sub_cat": [
{
"id": "770",
"cat_id": "14",
"sub_category": "Pan America"
},
{
"id": "771",
"cat_id": "14",
"sub_category": "John Players"
},
{
"id": "835",
"cat_id": "15",
"sub_category": "Roadster"
},
{
"id": "836",
"cat_id": "15",
"sub_category": "wildcraft"
},
{
"id": "833",
"cat_id": "154",
"sub_category": "Pepe jeans"
},
{
"id": "834",
"cat_id": "154",
"sub_category": "John players"
}
],
"id": "154",
"cat_id": "x",
"category": "Jeans"
}
],
"status": 100
}
While trying to fetch data, and put it in to a list adapter in which i want to display categories in one text box and subcategories in other with comma separation. Like this:
Category : Jeans
Sub Category :John players,Pepe jeans,Pan America,Roadster,wildcraft
I tried implementing this by creating model class for both category and sub category. Getting category correctly, but getting all subcategories.
Here is code for same:
try{
JSONObject jsonObject = new JSONObject(jsonString);
ArrayList<String> categoryList = new ArrayList<>();
HashMap<String,ArrayList<String>> allCategory = new HashMap<>();
JSONArray dataArray = jsonObject.getJSONArray("data");
for(int i=0;i<dataArray.length();i++)
{
JSONObject internalObject = dataArray.getJSONObject(i);
categoryList.add(internalObject.getString("category"));
JSONArray jsonArray = internalObject.getJSONArray("sub_cat");
ArrayList<String> subCategoryList = new ArrayList<>();
for(int j=0;j<jsonArray.length();j++)
{
subCategoryList.add(jsonArray.getJSONObject(j).getString("sub_category"));
}
allCategory.put(categoryList.get(i),subCategoryList);
}
Log.d("Check",hashMap+" ");
}
catch (Exception exe)
{
exe.printStackTrace();
}
You will get categoryList for all category and allCategory containing Hashmap. For mapping of category with its list of sub_categories.
Here is MainActivity.java class from where list is called:
public class MainActivity extends Activity {
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
HashMap<String,ArrayList<String>> allCategory;
private ArrayList<String> categoryList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String[] mStrings = new String[20];
allCategory= new HashMap<>();
// get the listview
expListView = (ExpandableListView) findViewById(R.id.lvExp);
String jsonString = "{\n" +
"\"data\": [\n" +
" {\n" +
" \"sub_cat\": [\n" +
" {\n" +
" \"id\": \"770\",\n" +
" \"cat_id\": \"14\",\n" +
" \"sub_category\": \"Pan America\"\n" +
" },\n" +
" {\n" +
" \"id\": \"771\",\n" +
" \"cat_id\": \"14\",\n" +
" \"sub_category\": \"John Players\"\n" +
" }\n" +
" ],\n" +
" \"id\": \"14\",\n" +
" \"cat_id\": \"x\",\n" +
" \"category\": \"Casual shirts\"\n" +
" },\n" +
" {\n" +
" \"sub_cat\": [\n" +
" {\n" +
" \"id\": \"770\",\n" +
" \"cat_id\": \"14\",\n" +
" \"sub_category\": \"Pan America\"\n" +
" },\n" +
" {\n" +
" \"id\": \"771\",\n" +
" \"cat_id\": \"14\",\n" +
" \"sub_category\": \"John Players\"\n" +
" },\n" +
" {\n" +
" \"id\": \"835\",\n" +
" \"cat_id\": \"15\",\n" +
" \"sub_category\": \"Roadster\"\n" +
" },\n" +
" {\n" +
" \"id\": \"836\",\n" +
" \"cat_id\": \"15\",\n" +
" \"sub_category\": \"wildcraft\"\n" +
" }\n" +
" ],\n" +
" \"id\": \"15\",\n" +
" \"cat_id\": \"x\",\n" +
" \"category\": \"Jackets\"\n" +
" },\n" +
" {\n" +
" \"sub_cat\": [\n" +
" {\n" +
" \"id\": \"770\",\n" +
" \"cat_id\": \"14\",\n" +
" \"sub_category\": \"Pan America\"\n" +
" },\n" +
" {\n" +
" \"id\": \"771\",\n" +
" \"cat_id\": \"14\",\n" +
" \"sub_category\": \"John Players\"\n" +
" },\n" +
" {\n" +
" \"id\": \"835\",\n" +
" \"cat_id\": \"15\",\n" +
" \"sub_category\": \"Roadster\"\n" +
" },\n" +
" {\n" +
" \"id\": \"836\",\n" +
" \"cat_id\": \"15\",\n" +
" \"sub_category\": \"wildcraft\"\n" +
" },\n" +
" {\n" +
" \"id\": \"833\",\n" +
" \"cat_id\": \"154\",\n" +
" \"sub_category\": \"Pepe jeans\"\n" +
" },\n" +
" {\n" +
" \"id\": \"834\",\n" +
" \"cat_id\": \"154\",\n" +
" \"sub_category\": \"John players\"\n" +
" }\n" +
" ],\n" +
" \"id\": \"154\",\n" +
" \"cat_id\": \"x\",\n" +
" \"category\": \"Jeans\"\n" +
" }\n" +
"],\n" +
"\"status\": 100\n" +
"}";
// preparing list data
prepareListData(jsonString);
listAdapter = new ExpandableListAdapter(this, categoryList, allCategory);
// setting list adapter
expListView.setAdapter(listAdapter);
}
/*
* Preparing the list data
*/
private void prepareListData(String jsonString) {
try{
JSONObject jsonObject = new JSONObject(jsonString);
categoryList = new ArrayList<>();
JSONArray dataArray = jsonObject.getJSONArray("data");
for(int i=0;i<dataArray.length();i++)
{
JSONObject internalObject = dataArray.getJSONObject(i);
categoryList.add(internalObject.getString("category"));
JSONArray jsonArray = internalObject.getJSONArray("sub_cat");
ArrayList<String> subCategoryList = new ArrayList<>();
for(int j=0;j<jsonArray.length();j++)
{
subCategoryList.add(jsonArray.getJSONObject(j).getString("sub_category"));
}
allCategory.put(categoryList.get(i),subCategoryList);
}
Log.d("Check",allCategory+" ");
}
catch (Exception exe)
{
exe.printStackTrace();
}
}
}
Here is Expandlist Adapter:
public class ExpandableListAdapter extends BaseExpandableListAdapter {
HashMap<String,ArrayList<String>> listDataEditText;
int expandedGroup=0;
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, ArrayList<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, ArrayList<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
listDataEditText = new HashMap<>();
for(int j=0;j<listDataHeader.size();j++) {
ArrayList<String> preInsertion = new ArrayList<>();
for (int i =0;i<this._listDataChild.get(_listDataHeader.get(j)).size();i++)
{
preInsertion.add("");
}
listDataEditText.put(listDataHeader.get(j),preInsertion);
}
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(final int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
TextView txtListChild = convertView.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(final int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
and here is list items:
for GroupView "list_group":
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:layout_editor_absoluteY="81dp">
<RelativeLayout
android:id="@+id/relativeLayout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/lblListHeader"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="48dp"
android:text="TextView"
android:textColor="#000000"
android:textSize="33dp" />
</RelativeLayout>
</android.support.constraint.ConstraintLayout>
for Child View "list_item":
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/linearLayout4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.194"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.137">
<TextView
android:id="@+id/lblListItem"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="TextView"
android:textColor="#000000"
android:textSize="17dp" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
Try it and let me know if need more.
Use this SimpleAdapter for showing all sub_categories list:
public class SimpleAdapter extends BaseAdapter {
ArrayList<String> stringArrayList;
Context context;
public SimpleAdapter(Context context,ArrayList<String> stringArrayList)
{
this.context = context;
this.stringArrayList = stringArrayList;
}
@Override
public int getCount() {
return stringArrayList.size();
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
if (view == null) {
LayoutInflater infalInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = infalInflater.inflate(R.layout.list_item, null);
}
TextView txtListChild = view.findViewById(R.id.lblListItem);
txtListChild.setText(stringArrayList.get(i));
return view;
}
}
and make main layout as:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="5dp"
>
<ListView
android:id="@+id/listView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</ListView>
</LinearLayout>