I'm a little lost here. I'm trying to add a custom object(with 3 integers, 1 double, and 1 date) to an arraylist when a button is clicked. I want the arraylist to be shown in another classes listview. So far this is what I have for the custom class:
ublic class Record {
private Integer squat, bench, dead;
private double total;
private Date dateTime;
public Record(int squat, int bench, int dead, double total, Date date) {
this.bench = bench;
this.dateTime = date;
this.dead = dead;
this.squat = squat;
this.total = total;
}
public Integer getSquat() {
return squat;
}
public void setSquat(Integer squat) {
this.squat = squat;
}
public Integer getBench() {
return bench;
}
public void setBench(Integer bench) {
this.bench = bench;
}
public Integer getDead() {
return dead;
}
public void setDead(Integer dead) {
this.dead = dead;
}
public Double getTotal() {
return total;
}
public void setTotal(Integer total) {
this.total = total;
}
public Date getDateTime() {
return dateTime;
}
public void setDateTime(Date dateTime) {
this.dateTime = dateTime;
}
}
EDIT: Classname: MyMaxes.class : In the class where the button is clicked, I have this(I'm not sure how to get the current date when button is clicked):
public ArrayList<Record> records = new ArrayList<>();
maxTotal = maxDead + maxBench + maxSquat;
int maxDead = Integer.parseInt(mEditTextDead.getText().toString());
int maxSquat = Integer.parseInt(mEditTextSquat.getText().toString());
int maxBench = Integer.parseInt(mEditTextBench.getText().toString());
records.add(new Record(maxSquat, maxBench, maxDead, maxTotal, ));
Edit: Class name = MyProgress.class : And in the class I want to set the listview to this arraylist(I'm not sure how to get the arraylist from the other class):
RecordAdapter adapter = new RecordAdapter(getApplicationContext(),R.layout.custom_record);
ListView listViewRec = (ListView) findViewById(R.id.listViewRecord);
}
This is my RecordAdapter class, but im not sure what to add there either:
public class RecordAdapter extends ArrayAdapter<Record> {
public RecordAdapter(Context context, int resource) {
super(context, resource);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return super.getView(position, convertView, parent);
}
}
Thanks for any help
I think the problem is that you have two different adapters:
RecordAdapter adapter = new RecordAdapter(getApplicationContext(),R.layout.custom_record);
ArrayAdapter<Record> arrayAdapter = new ArrayAdapter<Record>(this, R.layout.custom_record, records);
You should use one or the other, not both. It appears that arrayAdapter should work. So change all of your code to use it.
Alternatively, you can use your custom RecordAdapter. If you do this, then you should create the ArrayList inside this class. Then when the user clicks a button, you send the new Record object to the RecordAdapter instance. The easiest way to do this is to add a addRecord() method to RecordAdapter.
Get Current Date:
All you need to do is create a new Date object:
Date currentDate = new Date();
See the linked javadocs for details about how to use Date.
You do not need the custom RecordAdapter. Nor do you need the ArrayList. You can treat your ArrayAdapter as an ArrayList that feeds into your ListView. All you need to do is create an ArrayAdapter and populate it the same way you do with the ArrayList:
public ArrayAdapter<Record> records = new ArrayAdapter<>(getApplicationContext(), R.layout.custom_record);
maxTotal = maxDead + maxBench + maxSquat;
int maxDead = Integer.parseInt(mEditTextDead.getText().toString());
int maxSquat = Integer.parseInt(mEditTextSquat.getText().toString());
int maxBench = Integer.parseInt(mEditTextBench.getText().toString());
records.add(new Record(maxSquat, maxBench, maxDead, maxTotal ));
Then, whenever you want to add a record to you listview, use this:
records.add(new Record(maxSquat, maxBench, maxDead, maxTotal));
EDIT:
Forgot a very important part. You need to get your ListView and set the ArrayAdapter to populate it.
ListView listViewRec = (ListView) findViewById(R.id.listViewRecord);
listViewRec.setAdapter(records);
Related
I am new in Android Development and working on a project where I need to call an API after every one second, in that API there is field "Amount"(dBID) which keeps on changing, so I need to update the latest Amount (dBID) in recyclerview.
In order to do so, I have called this API in a service after every interval of one second.
The data is Showing Properly no Issue.
But for Now I need to perform some action on the Old Amount and New Amount.
Action Required : I need to compare the old value (dBID) with the New Value (dBID).
If the New Value is greater then I need to change the Text Color of Amount (dBID) to BLUE.
If the New Value is smaller then I need to change the Text Color of Amount (dBID) to RED.
Tried to achieve this by storing the old data in a Variable and then Comparing it to the new Value.
Issue : This logic is working fine until there are 5 or less Items in recyclerview as soon as the sixth item is added the same logic does not work.
Help me if anyone knows how I can achieve this.
For Example you can refer an App Vertexfx : Quotes Tab.
Below is the Code which I Tried.
Adapter class of the RecyclerView:
public class QuoteAdapter extends RecyclerView.Adapter <QuoteAdapter.MyViewHolder>{
Context context;
List<QuoteData> data;
public QuoteAdapter(Context context,List<QuoteData> data)
{
this.data = data;
this.context = context;
}
class MyViewHolder extends RecyclerView.ViewHolder{
TextView time,symbol,sellmax,selllow,buymax,buylow,buy,sell,spread,lowtext,hightext;
LinearLayout layout,layoutbid,layoutask;
float currentbid,lastbid,currentask,lastask;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
time = itemView.findViewById(R.id.TVTime);
symbol = itemView.findViewById(R.id.TVSymbol);
sellmax = itemView.findViewById(R.id.TVSELLMAX);
selllow = itemView.findViewById(R.id.TVSELLLOW);
buymax = itemView.findViewById(R.id.TVBUYMAX);
buylow = itemView.findViewById(R.id.TVBUYHIGH);
buy = itemView.findViewById(R.id.TVBUY);
sell = itemView.findViewById(R.id.TVSELL);
spread = itemView.findViewById(R.id.TVSpread1);
lowtext = itemView.findViewById(R.id.low);
hightext = itemView.findViewById(R.id.high);
layout = itemView.findViewById(R.id.layout);
layoutbid = itemView.findViewById(R.id.LLBid);
layoutask = itemView.findViewById(R.id.LLAsk);
currentbid = 0;
lastbid = 0;
currentask = 0;
lastask = 0;
}
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.quotelist,viewGroup,false);
return new MyViewHolder(view);
}
#SuppressLint("ResourceAsColor")
#Override
public void onBindViewHolder(#NonNull final MyViewHolder myViewHolder, final int i) {
final QuoteData data1 = data.get(i);
myViewHolder.time.setText(data1.dLut);
myViewHolder.symbol.setText(data1.dSymbol);
myViewHolder.sellmax.setText(data1.dBid); //Bid
myViewHolder.selllow.setText(data1.dLow);
myViewHolder.buymax.setText(data1.dAsk); //ask
myViewHolder.buylow.setText(data1.dHigh);
myViewHolder.currentbid = Float.parseFloat((data1.dBid));
myViewHolder.currentask = Float.parseFloat((data1.dAsk));
if (myViewHolder.currentbid > myViewHolder.lastbid)
{
myViewHolder.sellmax.setTextColor(Color.BLUE);
}
if (myViewHolder.currentbid < myViewHolder.lastbid)
{
myViewHolder.sellmax.setTextColor(Color.RED);
}
myViewHolder.lastbid = myViewHolder.currentbid;
myViewHolder.lastask = myViewHolder.currentask;
}
});
}
I suggest you take a look at those classes from the Android SDK:
DiffUtil
AsyncListDiffer
ItemAnimator
DiffUtil
DiffUtil is designed to compare existing and new recycler view items and fires appropriate events. You need to pass a callback that can tell if two items are the same and if their content has changed.
AsyncListDiffer
It wraps the DiffUtil and executes it's logic asynchronously, giving better performance.
ItemAnimator
The ItemAnimator for a given RecyclerView is called by default when change events are fired on it's items. You can provide an implementation of the animateChange method to change your color accordingly.
For Future reference I have resolved the above mentioned issue using the below code.
Defined two ArrayList of String in Adapter
public class QuoteAdapter extends RecyclerView.Adapter <QuoteAdapter.MyViewHolder>{
Context context;
List<QuoteData> data;
List<String> olddatabid = new ArrayList<String>();
List<String> newdatabid = new ArrayList<String>();
List<String> olddataask = new ArrayList<String>();
List<String> newdataask = new ArrayList<String>();
class MyViewHolder extends RecyclerView.ViewHolder{
TextView time,symbol,sellmax,selllow,buymax,buylow,buy,sell,spread,lowtext,hightext;
LinearLayout layout,layoutbid,layoutask;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
time = itemView.findViewById(R.id.TVTime);
symbol = itemView.findViewById(R.id.TVSymbol);
sellmax = itemView.findViewById(R.id.TVSELLMAX);
selllow = itemView.findViewById(R.id.TVSELLLOW);
buymax = itemView.findViewById(R.id.TVBUYMAX);
buylow = itemView.findViewById(R.id.TVBUYHIGH);
buy = itemView.findViewById(R.id.TVBUY);
sell = itemView.findViewById(R.id.TVSELL);
spread = itemView.findViewById(R.id.TVSpread1);
lowtext = itemView.findViewById(R.id.low);
hightext = itemView.findViewById(R.id.high);
layout = itemView.findViewById(R.id.layout);
layoutbid = itemView.findViewById(R.id.LLBid);
layoutask = itemView.findViewById(R.id.LLAsk);
}
}
public QuoteAdapter(Context context,List<QuoteData> data)
{
this.data = data;
this.context = context;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.quotelist,viewGroup,false);
return new MyViewHolder(view);
}
#SuppressLint("ResourceAsColor")
#Override
public void onBindViewHolder(#NonNull final MyViewHolder myViewHolder, final int i) {
final QuoteData data1 = data.get(i);
myViewHolder.time.setText(data1.dLut);
myViewHolder.symbol.setText(data1.dSymbol);
myViewHolder.sellmax.setText(data1.dBid); //Bid
myViewHolder.selllow.setText(data1.dLow);
myViewHolder.buymax.setText(data1.dAsk); //ask
myViewHolder.buylow.setText(data1.dHigh);
if (newdatabid.size()< data.size())
{
newdatabid.add(data1.dBid); //Insert Value in array for the first time
}
if (olddatabid.size()< data.size())
{
olddatabid.add(data1.dBid); //Insert Value in array for the first time
}
if (newdataask.size()< data.size())
{
newdataask.add(data1.dAsk); //Insert Value in array for the first time
}
if (olddataask.size()< data.size()) //Insert Value in array for the first time
{
olddataask.add(data1.dAsk);
}
newdatabid.set(i,data1.dBid); //Store Value in array
newdataask.set(i,data1.dAsk); //Store Value in array
//Compare and perform Logic
if (Float.valueOf(newdatabid.get(i)) > Float.valueOf(olddatabid.get(i)))
{
myViewHolder.sellmax.setTextColor(Color.BLUE);
}
if (Float.valueOf(newdatabid.get(i)) < Float.valueOf(olddatabid.get(i)))
{
myViewHolder.sellmax.setTextColor(Color.RED);
}
if (Float.valueOf(newdataask.get(i)) > Float.valueOf(olddataask.get(i)))
{
myViewHolder.buymax.setTextColor(Color.BLUE);
}
if (Float.valueOf(newdataask.get(i)) < Float.valueOf(olddataask.get(i)))
{
myViewHolder.buymax.setTextColor(Color.RED);
}
olddatabid.set(i,newdatabid.get(i));
olddataask.set(i,newdataask.get(i));
}
});
}
}
#Override
public int getItemCount() {
return data.size();
}
}
I'm Very new to Java and android... I'm Try to create an ListView using BaseAdapter List being created successfully i have a EditText along with button for each list item but the real problem is when i put some data into editText Field and scroll down to change value of last list item then i go back to the top it refreshes the data to default value it doesn't contain the value which was entered by user before scrolling down
My BaseAdaper Code
class CoustomAdptr extends BaseAdapter{
String[] dates;
Integer[] inventory;
Integer totalrooms;
public CoustomAdptr(RoomFragment roomFragment, String[] dates, Integer[] inventory, Integer totalrooms) {
this.dates = dates;
this.inventory = inventory;
this.totalrooms = totalrooms;
}
#Override
public int getCount() {
return dates.length;
}
#Override
public Object getItem(int i) {
return null;
}
#Override
public long getItemId(int i) {
return 0;
}
#Override
public View getView(final int i, View view, ViewGroup viewGroup) {
view = getLayoutInflater().inflate(R.layout.inventory_listview,null);
TextView textView = (TextView) view.findViewById(R.id.roomListViewText);
final EditText editText = (EditText) view.findViewById(R.id.roomListInventory);
final Button updateButton = (Button) view.findViewById(R.id.roomListViewInventoryUpdateButton);
if(inventory[i] == 0){
editText.setBackgroundColor(getResources().getColor(R.color.SoldOut));
editText.setTextColor(getResources().getColor(R.color.SoldOutTextColor));
} else if(inventory[i] < totalrooms){
editText.setBackgroundColor(getResources().getColor(R.color.invetory));
editText.setTextColor(getResources().getColor(R.color.invetoryTextColor));
} else if(inventory[i] == totalrooms){
editText.setBackgroundColor(getResources().getColor(R.color.fullInventory));
editText.setTextColor(getResources().getColor(R.color.fullInventoryTextColor));
}
editText.setText(String.valueOf(inventory[i]));
textView.setText(dates[i]);
updateButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//String name = editText.getText().toString();
//String name1 = dates[i];
//String name2 = getArguments().getString("room_id");
updateButton.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_done_black_24dp,0,0,0);
//updateButton.setBackgroundColor(getResources().getColor(R.color.SoldOut));
updateButton.setText("Updated");
updateButton.setEnabled(false);
Toast.makeText(getContext(), "Update Inventory Button Clicked", Toast.LENGTH_LONG).show();
}
});
return view;
}
}
This is How Im Passing Data to My Adapter
JSONObject jObj = parentObject.getJSONObject("success");
JSONObject jObj2 = jObj.getJSONObject("data");
JSONArray arrajson = jObj2.getJSONArray("inventories");
String arrayCount = Integer.toString(arrajson.length());
String[] dates = new String[arrajson.length()];
Integer[] inventory = new Integer[arrajson.length()];
Integer totalrooms = new Integer(jObj2.getInt("total_room"));
for (int i=0; i<arrajson.length();i++){
JSONObject jsonObject = arrajson.getJSONObject(i);
dates[i] = jsonObject.getString("date");
inventory[i] = jsonObject.getInt("inventory");
}
CoustomAdptr coustomAdptr = new CoustomAdptr(RoomFragment.this,dates,inventory,totalrooms);
listView.setAdapter(coustomAdptr);
Help Needed :- I Want to retain same visible and Value of edittext as users enters on scroll up or down... i hope i was able to explain my problem clearly
After clicking a button, save it's state in a boolean array or somewhere else. And inside getView method, check if this button was previously clicked or not then setup your view accordingly.
It would be better if you create a model class for rows.
How can I create a listview that looks for more than one information in an array?
An example, suppose I have a listview of names from an array, but I still have another array that contains data like age and profession that match each name of the first array.
How could I get more than one information from an array?
Thank you so much.
What is happening when you load an ArrayList into an ArrayAdapter, and then an ArrayAdapter into a ListView, is the ArrayAdapter uses a layout file which contains a TextView. The ArrayAdapter takes the string in each ArrayList element, inflates (creates) a new View with a layout per ArrayList element, and then places the element string in each new layout's TextView.
If you want to customize each row's visual appearance (including what data appears) in your list on the screen, you can make your own custom Adapter by making a new class that extends BaseAdapter and you can make your own layout file that you will inflate in the BaseAdapter. Then find the elements in your layout and assign the data to the elements on a per row basis. Below is example code I wrote for you. I would highly suggest reading the Android documentation on ListViews and Adapters: https://developer.android.com/guide/topics/ui/layout/listview.html
https://developer.android.com/guide/topics/ui/declaring-layout.html#AdapterViews
In my activity OnCreate method (You will need to have a ListView in your layout called list_view or change the name of the ListView in my code):
ArrayList<MyDataModel> myDataModels = new ArrayList<>();
for(int i = 0; i < 50; i++) {
MyDataModel newModel = new MyDataModel("Person" + i, new Random().nextInt() % 100, "Some Profession" + i);
myDataModels.add(newModel);
}
MyListAdapter myListAdapter = new MyListAdapter(myDataModels);
ListView listView = (ListView)findViewById(R.id.list_view);
listView.setAdapter(myListAdapter);
MyDataModel.java:
public class MyDataModel {
public String mName, mProfession;
public int mAge;
public MyDataModel(String name, int age, String profession) {
mName = name;
mAge = age;
mProfession = profession;
}
}
MyListAdapter.java:
public class MyListAdapter extends BaseAdapter {
private ArrayList<MyDataModel> mMyDataModels;
public MyListAdapter(ArrayList<MyDataModel> dataModels) {
mMyDataModels = dataModels;
}
#Override
public int getCount() {
return mMyDataModels.size();
}
#Override
public MyDataModel getItem(int position) {
return mMyDataModels.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if(view == null) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_data_model_item, parent, false);
}
MyDataModel model = mMyDataModels.get(position);
((TextView)view.findViewById(R.id.person_name)).setText(model.mName);
((TextView)view.findViewById(R.id.person_age)).setText(String.valueOf(model.mAge));
((TextView)view.findViewById(R.id.person_profession)).setText(model.mProfession);
return view;
}
}
AutoCompleteTextView lets users choose a string from a list of valid values. Like, I imagine, every developer who wants to use this yoke, I am much more interested in the id of the user's selection than its string label. Is there any way to retrieve the id property of a chosen object, or its index in the source array?
The following C# code let's users pick from a list of SomeObject. I'm working in Xamarin, but don't let this put you off. Fix my problem in java and I'll happily make it work in C#
public class AutoCompleteField : PhysicalField
{
protected AutoCompleteTextView actv;
public AutoCompleteField(IList<SomeObject> choices, LogicalField logical, string id)
: base(logical, id)
{
_choices = choices;
}
protected ArrayAdapter<SomeObject> _adapter;
public override void addToView(LayoutInflater inflater)
{
var ctx = App_NotMobility.CurrentActivity;
actv = new AutoCompleteTextView(ctx);
actv.Id = _form.generateId();
// test choices
var _choices = new List<SomeObject>();
_choices.Add(new SomeObject(234, "Oranges"));
_choices.Add(new SomeObject(456, "Apples"));
_choices.Add(new SomeObject(789, "Bananas"));
_adapter = new ArrayAdapter<SomeObject>(ctx, Android.Resource.Layout.SimpleDropDownItem1Line, _choices);
actv.Adapter = _adapter;
actv.ItemClick += delegate(object sender, AdapterView.ItemClickEventArgs e)
{
// HOW DO I ACCESS THE ID OR THE INDEX OF USER'S SELECTION ?????????????????
};
_form.AddView(actv);
}
}
public class SomeObject
{
public int Id { get; set; }
public string Label { get; set; }
public SomeObject(int id, string label)
{
Id = id;
Label = label;
}
public override string ToString()
{
return Label;
}
}
Once you have initialized the adapter and overdid the item click, all you need to do is get the particular object from your adapter at that particular position of item which you clicked.
In java it would be somewhat similar to,
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
SomeObject someObject = (SomeObject) adapter.getItem(position);
int id = someObject.getId();
}
Thats all you would need. I am not sure about your code in xamarin, how you would get the position because i don't see any method where the position is input variable, may be you could add the tag to your view and can get the tag on your click method.
var position = ((View)sender).Tag;
But i would recommend , if you can create a class extend the base adapter, that way you will the method GetView to override and can easily do what you are looking for. You constructor could be like this for start,
List<SomeObjects> items;
Activity context;
public CustomAdapter(Activity context, List<SomeObjects> items)
: base()
{
this.context = context;
this.items = items;
}
Ankush's answer worked. I'm posting the C# code here because there are some subtleties with casting and generics...
public class myActv : AutoCompleteTextView, AdapterView.IOnItemClickListener
{
PhysicalField _physical;
public myActv(Activity ctx, PhysicalField physical) : base(ctx)
{
OnItemClickListener = this;
_physical = physical;
}
public void OnItemClick(AdapterView parent, View view, int position, long id)
{
// This is the punchline...
SomeObject whatIwant = ((ArrayAdapter<SomeObject>)this.Adapter).GetItem(position);
}
}
Here searchText is an Autocompletetextview..
searchText.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
int position = position; //Adapter selection position
}
});
I have a peculiar problem. I am parsing a restaurant's menu card. They have it in english and in german. I have a class FoodItem as :
public class FoodItem {
private int foodClass;
private String foodType;
private String foodName;
private String foodCost;
private String hauptBeilage;
private String salat;
}
Now, I have an arraylist of fooditems downloaded using Jsoup. I separate the german and english menu using the String foodType.
I want to list german menu at the start. But, I get the english menu appended to the list as well. How should I tackle this?
My downloadThread (Jsoup) is :
public void run()
{
Log.i("downloadThread", "Inside run() - Starting getFoodItems");
getDailyGerman();
getDailyEnglish();
//Sending a message through handler here
}
In my activity, I have:
handler = new android.os.Handler() {
#Override
public void handleMessage(Message msg) {
foodItemAdapter.notifyDataSetChanged();
}
};
If I send a message through handler after getDailyGerman(); then i get a illegalstateexception saying the content of the adapter has changed, but the listview is not updated.
My Adapter code :
public FoodItemAdapter(Context context, int textViewResourceId, ArrayList<FoodItem> FoodItemArg) {
super(context, textViewResourceId, FoodItemArg);
FoodItemAdapter.foodItems = FoodItemArg;
this.setNotifyOnChange(false);
// if(FoodItemAdapter.foodItems == null)
// Log.i("Adapter", "Problem Inside Adapter Constructor");
}
//=========================public methods============================
public static ArrayList<FoodItem> getDailyEnglishFoodItems()
{
ArrayList<FoodItem> returnList = new ArrayList<FoodItem>();
for(FoodItem eachItem : FoodItemAdapter.foodItems)
{
if(eachItem.getFoodClass() == 1)
{
Log.i("Adapter" , "Adding English Daily Food : " + eachItem.getFoodName());
returnList.add(eachItem);
}
}
return returnList;
}
public static ArrayList<FoodItem> getDailyGermanFoodItems()
{
ArrayList<FoodItem> returnList = new ArrayList<FoodItem>();
for(FoodItem eachItem : FoodItemAdapter.foodItems)
{
if(eachItem.getFoodClass() == 2)
{
Log.i("Adapter" , "Adding German Daily Food : " + eachItem.getFoodName());
returnList.add(eachItem);
}
}
return returnList;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
/*
* Describes each view in the list view.
* Get the question and find the question text, timestamp and the votes.
* Show them in the textview which is a part of the listview.
*/
View v = convertView;
FoodItem foodItem =(FoodItem) FoodItemAdapter.foodItems.get(position);
if(foodItem == null)
{
Log.i("Adapter", "Null Food Item");
}
int colorPos = 0;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater)this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.fooditem_row, null);
colorPos = position % colors.length;
}
Please help as I am stuck at this point for 3 days. Thanks.
I had the same issue once I added the items and called
notifyDataSetChanged() in the UI
thread issue solved
From What I understand of your question, you want to have the English items at the top of the list then the German Items. you can do that using Collection.sort method and Using a specific comparator for the task in hand.
For example:
final List<FoodItem> combinedList = getDailyGermanFoodItems();
combinedList.addAll(getDailyEnglishFoodItems());
Collections.sort(compinedList, new FoodItemComparator());
//then you call the handler to update the adapter and the listView
handler.post(new Runnable(){
public void run(){
FoodItemAdapter adapter = new FoodItemAdapter(activity.this, layout, combinedList);
listView.setAdapter(adapter);
}});
where FoodItemComparator:
public class FoodItemComparatorimplements Comparator<FoodItem>{
public int compare(FoodItem item1, item2) {
String foodType1 = item1.getFoodType();
String foodType2 = item2.getFoodType();
if (foodType1.equals(foodType2))
return 0;
if (foodType1.equals("English"))
return 1;
if (foodType2.equals("English))
return -1;
return foodType1.compareTo(foodType2);
}
}
Assuming foodType Value is guaranteed to be German/English only.
Also you will have to have a getter funcion inside your FoodItem Class so the comparator can access it:
Class FoodItem
.......
public String getFoodType(){
return foodType;
}
EDIT
If you want to display each one alone , then store the two lists inside your activity object, then when user select a language (english / german):
FoodItemAdapter adapter = new FoodItemAdapter(activity.this, layout, germanList);
listView.setAdapter(adapter);