About NotifyDataSetChanged - android

I've been working on adapter and tried to update it with notifydatasetchanged. But the problem I face is that after i successfully update the adapter where I can see the changes have been made in the listview, it will then change back to previous data after I return from other fragment. I've heard that adapter will reuse the convert view with same data which cause the problem, but I don't know how to fix this. I've searched for the answer but couldn't find anything similar as most of the answers were all about declaring a new adapter.
Below is part of my code:
1.refresh method in fragment
public void toggleRefreshInBackground(ArrayList<HashMap<String, Object>> list) {
dialog_list.clear();
dialog_list.addAll(list);
adapter.update(list);
}
2.getView() of my adapter
public class DialogListAdapter extends BaseAdapter {
Context context;
private ImageLoader imageLoader;
private static LayoutInflater inflater;
private ArrayList<HashMap<String, Object>> member_list;
private ArrayList<HashMap<String, Object>> member_list2;
private SparseBooleanArray mSelectedItemsIds;
private ArrayList<Integer> selectedItemPosition;
//private static final int droidGreen = Color.parseColor("#A4C639");
//private BadgeView badge;
Resources res;
String sorting;
public DialogListAdapter(Context c,
ArrayList<HashMap<String, Object>>content, String temp_sorting) {
inflater=(LayoutInflater)c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.context=c;
this.member_list = content;
this.member_list2 = new ArrayList<>();
this.member_list2.addAll(this.member_list);
res=c.getResources();
this.sorting = temp_sorting;
mSelectedItemsIds = new SparseBooleanArray();
selectedItemPosition = new ArrayList<>();
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return member_list.size();
}
#Override
public HashMap<String, Object> getItem(int position) {
// TODO Auto-generated method stub
return member_list.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public void update(ArrayList<HashMap<String,Object>> obj) {
member_list2.clear();
member_list2.addAll(obj);
notifyDataSetChanged();
}
public final class DialogListItem{ // view holder
public TextView read_count;
public TextView nameView;
public TextView numberView;
public TextView statusView;
public ImageView thumb_image;
public TextView timeView;
public TextView senderView;
public ImageView tick;
//public BadgeView badge;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
int index;
if(sorting.equals("D")){
index = member_list.size()-position-1;
}else{
index = position;
}
View row = convertView;
DialogListItem dialogItem=null;
String textbuff_time = null;
String textbuff_mess = null;
String textbuff_sender = null;
if (convertView==null){
row=inflater.inflate(R.layout.dialog_list_single, null);
dialogItem=new DialogListItem();
dialogItem.read_count=(TextView)row.findViewById(R.id.readcount);
dialogItem.nameView=(TextView)row.findViewById(R.id.member_name);
dialogItem.numberView=(TextView)row.findViewById(R.id.tab2number);
dialogItem.statusView=(TextView)row.findViewById(R.id.tab2status);
dialogItem.thumb_image=(ImageView)row.findViewById(R.id.tab2image);
dialogItem.timeView=(TextView) row.findViewById(R.id.tab2date);
dialogItem.senderView=(TextView) row.findViewById(R.id.tab2sender);
dialogItem.tick = (ImageView) row.findViewById(R.id.tick);
row.setTag(dialogItem);
}
else{
dialogItem=(DialogListItem) row.getTag();
}
if (mSelectedItemsIds.get(position)) {
row.setBackgroundColor(context.getResources().getColor(R.color.item_selected));
} else {
row.setBackgroundColor(context.getResources().getColor(R.color.item_unselected));
}
HashMap<String,Object>items;
items=member_list.get(index);
dialogItem.nameView.setText((String)items.get(DBhelper.MEMBER_NAME));
dialogItem.nameView.setTypeface(null,Typeface.BOLD);
dialogItem.nameView.setSingleLine(true);
dialogItem.nameView.setMaxLines(1);
dialogItem.nameView.setEms(13);
dialogItem.nameView.setEllipsize(TruncateAt.END);
dialogItem.numberView.setText((String)items.get(DBhelper.MEMBER_NUMBER));
String textbuff=(String)items.get(DBhelper.MEMBER_LMESSAGE);
if (!TextUtils.isEmpty(textbuff)){
textbuff_time=textbuff.substring(0, 19);
textbuff_mess=textbuff.substring(20);
int bound=textbuff_mess.indexOf("½");
if(bound!=-1){
textbuff_sender=textbuff_mess.substring(0,bound);
textbuff_mess=textbuff_mess.substring(bound+2);
}
else
textbuff_sender="";
dialogItem.statusView.setText(textbuff_mess);
if (textbuff_sender.equals(context.getResources().getString(R.string.myself))) {
dialogItem.senderView.setVisibility(View.GONE);
dialogItem.tick.setVisibility(View.VISIBLE);
} else {
textbuff_sender = textbuff_sender + ": ";
dialogItem.senderView.setVisibility(View.VISIBLE);
dialogItem.senderView.setText(textbuff_sender);
dialogItem.tick.setVisibility(View.GONE);
}
try {
dialogItem.timeView.setText(Utility.relativeTime(row.getContext(), textbuff_time));
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else{
dialogItem.statusView.setText("");
dialogItem.senderView.setText("");
dialogItem.timeView.setText("---");
}
dialogItem.statusView.setTextColor(Color.GRAY);
dialogItem.statusView.setTypeface(null,Typeface.NORMAL);
dialogItem.timeView.setTextColor(Color.GRAY);
dialogItem.timeView.setTypeface(null,Typeface.NORMAL);
dialogItem.senderView.setTextColor(Color.GRAY);
dialogItem.senderView.setTypeface(null,Typeface.NORMAL);
dialogItem.senderView.getPaint().setTextSkewX(-0.25f);
String sformat=" "+String.valueOf(items.get(DBhelper.MEMBER_SIZE))+" ";
dialogItem.read_count.setText(sformat);
int badge_number=(Integer)items.get(DBhelper.MEMBER_SIZE);
if(badge_number>0){
dialogItem.read_count.setVisibility(View.VISIBLE);
dialogItem.statusView.setTextColor(Color.BLACK);
dialogItem.statusView.setTypeface(null,Typeface.BOLD);
dialogItem.timeView.setTextColor(Color.BLACK);
dialogItem.timeView.setTypeface(null,Typeface.BOLD);
dialogItem.senderView.setTextColor(Color.BLACK);
dialogItem.senderView.setTypeface(null,Typeface.BOLD);
dialogItem.senderView.getPaint().setTextSkewX(-0.25f);
}
else{
dialogItem.read_count.setVisibility(View.GONE);
}
StringBuffer link=new StringBuffer(Register.get_current_server_address());
if(items.get(DBhelper.MEMBER_TYPE).equals(res.getString(R.string.broadcast_chat))){
dialogItem.nameView.setTextColor(row.getResources().getColor(R.color.tab4_title));
link.append("uniappSystemFile.asp");
link.append("?file=").append("broadcast.png");
//imageLoader.DisplayImage(link.toString(), dialogItem.thumb_image);
Picasso.with(context).load(link.toString()).transform(new CircleTransform()).resize(200,200).into(dialogItem.thumb_image);
dialogItem.read_count.setVisibility(View.GONE); // disable broadcast badge
}
Picasso.with(context).load(R.drawable.ic_contact).resize(200,200).into(dialogItem.thumb_image);
Picasso.with(context).load(R.drawable.ic_notif).resize(200, 200).into(dialogItem.thumb_image);
}else{
link2 = new IMService(context.getApplicationContext()).group_image_thumb_get(tab2.myphone, (String) items.get(DBhelper.MEMBER_NUMBER));
dialogItem.nameView.setTextColor(row.getResources().getColor(R.color.tab3_title));
//imageLoader.DisplayImage(link2, dialogItem.thumb_image);
Picasso.with(context).load(link2).transform(new CircleTransform()).resize(200, 200).placeholder(R.drawable.ic_group_circle_black_48dp).error(R.drawable.ic_group_circle_black_48dp).into(dialogItem.thumb_image);
}
}
public void setSearchPattern(String pattern) {
filterListByPattern(pattern.trim());
this.notifyDataSetChanged();
}
private void filterListByPattern(String searchPattern) {
member_list.clear();
for (HashMap<String,Object> info : member_list2) {
boolean add = true;
do {
if (searchPattern == null || searchPattern.equals("")) {
break;
}
if (info.get(DBhelper.MEMBER_NAME).toString().toLowerCase().contains(searchPattern)) {
break;
}
add = false;
} while (false);
if (add) {
member_list.add(info);
}
}
}
public void resetList() {
this.member_list2 = new ArrayList<HashMap<String,Object>>();
this.member_list2.addAll(this.member_list);
this.notifyDataSetChanged();
}
public void remove(Object object) {
member_list.remove(object);
notifyDataSetChanged();
}
public void toggleSelection(int position) {
selectView(position, !mSelectedItemsIds.get(position));
}
public void removeSelection() {
mSelectedItemsIds = new SparseBooleanArray();
selectedItemPosition = new ArrayList<>();
notifyDataSetChanged();
}
public void selectView(int position, boolean value) {
if (value) {
mSelectedItemsIds.put(position, value);
selectedItemPosition.add(position);
} else {
mSelectedItemsIds.delete(position);
selectedItemPosition.remove(selectedItemPosition.indexOf(position));
}
notifyDataSetChanged();
}
public int getSelectedCount() {
return mSelectedItemsIds.size();
}
public SparseBooleanArray getSelectedIds() {
return mSelectedItemsIds;
}
public ArrayList<Integer> getItemPosition() {
return selectedItemPosition;
}
}
So, my question is why would my adapter and listview show the old data after I return from other fragment to this fragment, and how to fix this?
P.S. please don't tell me to declare a new adapter like this
adapter = new MyAdapter(list);
adapter.notifyDataSetChanged();
I know it works, but it's not a good and appropriate approach since it's a heavy operation and you don't even need to use notifyDataSetChanged after declaring a new adapter.
Many thanks

Try putting setRetainInstance(true);
inside your fragment.
If above does not work then try with onSaveInstanceState() as below -
Declare at top, Parcelable state;
Save listview state, state = listview.onSaveInstanceState(); inside onpause() of fragment or manually while changing fragment.
Then inside onCreateView check state is null or not. If null then set adapter / get data, if not then set
listview.onRestoreInstanceState(state);
On the other hand, Each time you load fragment, ArrayList will start off empty. So you need to be careful to save data.

Related

Transferring data into a separate ArrayList and displaying in RecyclerView

I have two ArrayLists from which I am trying to insert data into separate static ArrayList in another class and display in RecyclerView, but the recycler is not getting populated though the same was being done with a dummy ArrayList.Please help me with this problem.
My Class where I am inserting data from phoneContactNos and phoneContactName in two separate ArrayList: Common.selectedContactNos and Common.selectedContactName.
public void displayMatchedContacts()
{
try {
for (int i = 1; i < phoneContactNos.size(); i++) {
if (phoneContactNos.contains(registeredContactNos.get(i))) {
if (registeredContactNos.get(i) != null) {
try {
indexOfRegNumber = phoneContactNos.indexOf(registeredContactNos.get(i));
//Common.indexPosition_contacts=indexOfRegNumber;
Toast.makeText(this, "index" + String.valueOf(indexOfRegNumber), Toast.LENGTH_LONG).show();
if ((phoneContactNos.get(indexOfRegNumber) != null) &&(phoneContactName.get(indexOfRegNumber) != null)) {
//String regName="";
//String regContact="";
Common.selectedContactNos.add(phoneContactNos.get(indexOfRegNumber));
//Toast.makeText(this,selectedContactNos.get(i).toString(),Toast.LENGTH_SHORT).show();
//Toast.makeText(this,phoneContactNos.get(indexOfRegNumber).toString(),Toast.LENGTH_SHORT).show();
Common.selectedContactName.add(phoneContactName.get(indexOfRegNumber));
//Toast.makeText(this,selectedContactName.get(i).toString(),Toast.LENGTH_SHORT).show();
//Toast.makeText(this, phoneContactName.get(indexOfRegNumber).toString(), Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "null index no", Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
Log.i("Contacts display error", e.getLocalizedMessage());
e.printStackTrace();
}
}
}
}
}catch (Exception e)
{
Log.i("Contacts error in loop", e.getLocalizedMessage());
e.printStackTrace();
}
}
My Common class
public final class Common {
public static ArrayList<String> selectedContactNos=new ArrayList<>();
public static ArrayList<String> selectedContactName=new ArrayList<>();
public static String fcmId="";
public static int position;
public static String contacts_list="";
public static int indexPosition_contacts;
}
My RecyclerView populating code
public void populateList() {
Log.i("Populate List","Entered");
LinearLayoutManager mLinearLayoutManager = new LinearLayoutManager(this);
recyclerView_contacts.setLayoutManager(mLinearLayoutManager);
displayRecyclerAdapter = new DisplayRecyclerAdapter(this);
recyclerView_contacts.setAdapter(displayRecyclerAdapter);
}
My Adapter Class
public class DisplayRecyclerAdapter extends RecyclerView.Adapter<DisplayRecyclerAdapter.displayViewHolder> {
private LayoutInflater mInflater;
private Context context;
Fragment fragment;
FragmentTransaction ft;
FrameLayout container;
public DisplayContacts displayContacts;
public DisplayRecyclerAdapter(Context context) {
this.mInflater = LayoutInflater.from(context);
this.context = context;
ft = ((AppCompatActivity) context).getSupportFragmentManager().beginTransaction();
//displayContacts = new DisplayContacts();
}
#Override
public displayViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.contacts_row, parent, false);
displayViewHolder holder = new displayViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(displayViewHolder holder, int position) {
holder.setData(position);
//Common.position = position;
holder.setListeners();
//for(int i=0;i<((DisplayContacts)context).selectedContactName.size();i++)
for(int i=0;i<Common.selectedContactName.size();i++)
{
//String contactName=((DisplayContacts)context).selectedContactName.get(i);
String contactName=Common.selectedContactName.get(i);
//String contactNumber=((DisplayContacts)context).selectedContactNos.get(i);
String contactNumber=Common.selectedContactNos.get(i);
Toast.makeText(context,contactName+","+contactNumber,Toast.LENGTH_SHORT).show();
}
}
class displayViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
int position;
//ImageView productSearchImg;
TextView name_contactList;
Button call_contact;
public displayViewHolder(View itemView) {
super(itemView);
name_contactList = (TextView) itemView.findViewById(R.id.contactlist_name);
call_contact = (Button) itemView.findViewById(R.id.contactlist_call);
}
public void setData(int position) {
this.position = position;
//String displayContacts=((DisplayContacts) context).selectedContactName.get(position);
String displayContacts=Common.selectedContactName.get(position);
Toast.makeText(context,"name to display"+ displayContacts,Toast.LENGTH_SHORT).show();
//name_contactList.setText(((DisplayContacts) context).selectedContactName.get(position));
//name_contactList.setText(displayContacts);
name_contactList.setText("dummy text");
}
#Override
public void onClick(View v) {
//sendPushNotification();
startAudioCall();
}
public void setListeners() {
call_contact.setOnClickListener(displayViewHolder.this);
}
}
public void startAudioCall() {
Intent i = new Intent(context, AudioCallActivity.class).setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
#Override
public int getItemCount() {
return ((DisplayContacts) context).selectedContactName.size();
}
}
can be one of two things:
1.you are not attaching the adapter with data,hence empty
2.or you are updating your data but not calling notifyDataSetChanged()
try to pass the list data in your Adapter class while you are creating it,then attach it to the recyelerview.
//to give a vary basic example
List dataList;
RvAdapter(Context c,List data){
this.dataList=data;
}
onBidViewHolder(Viewholder holder,int position){
holder.tvName.setText(dataList.get(position).getName());
.......
}
//in your activity/fragment
RvAdapter adapter=new RavAdapter(context,dataList);
recylerview.setAdapter(adapter);
//if you change your data
adapter.notifyDataSetChanged()

Android Dagger2 Dependency Injection on CustomAdapter

I learn Dependency Injection using Dagger2 in my android code, I dont have any trouble using it until I try to inject the presenter in my CustomAdapter for ListView, it always return Null Value. The purpose is I want to execute the Presenter function when someone click the ListView Item. This is my CustomAdapter Looks like :
public class CustomAdapter extends BaseAdapter {
ArrayList<String> contactNameList, listGroup;
Context context;
ArrayList<Bitmap> contactImages;
ArrayList<Integer> listContactId;
private static LayoutInflater inflater=null;
#Inject
DetailScreenPresenter detailScreenPresenter;
public CustomAdapter(MainActivity mainActivity, ArrayList<String> contactNameList, ArrayList<Bitmap> contactImages, ArrayList<String> listGroup, ArrayList<Integer> listContactId)
{
this.contactNameList = contactNameList;
context = mainActivity;
this.contactImages = contactImages;
this.listGroup = listGroup;
this.listContactId = listContactId;
inflater = ( LayoutInflater )context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return contactNameList.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
public static class Holder
{
public Holder(View view,Context context)
{
ButterKnife.bind(this,view);
}
#BindView(R.id.txtName)
TextView tvName;
#BindView(R.id.txtGroup)
TextView tvGroup;
#BindView(R.id.imageProfile)
ImageView img;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View rowView;
rowView = inflater.inflate(R.layout.contact_list, null);
Holder holder=new Holder(rowView, context);
holder.tvName.setText(contactNameList.get(position));
holder.img.setImageBitmap(contactImages.get(position));
holder.tvGroup.setText(listGroup.get(position));
rowView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
detailScreenPresenter.loadDetail(listContactId.get(position));
}
});
return rowView;
}
}
and this is the MainActivity that trigger the CustomAdapter
public class MainActivity extends AppCompatActivity implements MainScreenContact.View {
#BindView(R.id.listContact)
ListView listView;
ArrayList<String> listName;
ArrayList<Bitmap> listImage;
ArrayList<String> listGroup;
ArrayList<Integer> listContactId;
HashMap<Integer, Bitmap> tempImageArray;
String[] letter={"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
#Inject
MainScreenPresenter mainPresenter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
listName = new ArrayList<>();
listImage = new ArrayList<>();
tempImageArray = new HashMap<>();
listGroup = new ArrayList<>();
listContactId = new ArrayList<>();
DaggerMainScreenComponent.builder()
.netComponent(((App) getApplicationContext()).getNetComponent())
.mainScreenModule(new MainScreenModule(this, new ContactDatabaseHelper(this)))
.build().inject(this);
mainPresenter.loadPost();
}
#Override
public void showPosts(List<Post> posts) {
Collections.sort(posts, new Comparator<Post>() {
#Override
public int compare(Post post1, Post post2) {
String name1=post1.getFirstName()+" "+post1.getLastName();
String name2=post2.getFirstName()+" "+post2.getLastName();
return name1.compareToIgnoreCase(name2);
}
});
int indexGroup=0;
for (int i = 0; i < posts.size(); i++) {
if(posts.get(i).getProfilePic().contains("http"))
mainPresenter.loadImage(posts.get(i).getProfilePic(), i);
else
mainPresenter.loadImage("http://example.com", i);
if(Arrays.binarySearch(letter,Character.toString(posts.get(i).getFirstName().charAt(0)).toUpperCase())==-1)
{
if(listGroup.size()==0)
listGroup.add("*");
else
listGroup.add(" ");
}
else
{
if(!listGroup.get(indexGroup).equalsIgnoreCase(Character.toString(posts.get(i).getFirstName().charAt(0)))) {
listGroup.add(Character.toString(posts.get(i).getFirstName().charAt(0)).toUpperCase());
indexGroup = i;
}
else
listGroup.add(" ");
}
listContactId.add(i, posts.get(i).getId());
listName.add(i, posts.get(i).getFirstName() + " " + posts.get(i).getLastName());
}
}
#Override
public void showError(String message) {
Toast.makeText(getApplicationContext(), "Error" + message, Toast.LENGTH_LONG).show();
}
#Override
public void showComplete() {
Toast.makeText(getApplicationContext(), "Complete", Toast.LENGTH_LONG).show();
}
#Override
public void setImageProfile(Bitmap profileBmp, int x) {
tempImageArray.put(x, profileBmp);
if(tempImageArray.size()==listName.size())
{
SortedSet<Integer> keys = new TreeSet<Integer>(tempImageArray.keySet());
for(Integer key : keys)
{
listImage.add(tempImageArray.get(key));
}
listView.setAdapter(new CustomAdapter(this, listName, listImage, listGroup, listContactId));
}
}
}
Please help how to inject the DetailScreenPresenter presenter.
Thanks alot
In general, in order to perform injection into any Object, you should explicitly call <some_dagger_component>.inject(<target_object>).
In your case, you could do it this way:
CustomAdapter adapter = new CustomAdapter(this, listName, listImage, listGroup, listContactId);
DaggerMainScreenComponent.builder()
.netComponent(((App) getApplicationContext()).getNetComponent())
.mainScreenModule(new MainScreenModule(this, new ContactDatabaseHelper(this)))
.build().inject(adapter);
listView.setAdapter(adapter);
However, what you're trying to do is an abuse of dependency injection framework - you should not perform injection into adapter, but simply pass the required objects to adapter's constructor.
In this post you can find additional information about dependency injection in Android.

Android delete item from Listview Imlemented Using Baseadapter

I have a adapter with this code:
public class LoadOrders_adapter extends BaseAdapter {
private JSONArray data;
private Context context;
public LoadOrders_adapter(JSONArray data, Context context) {
this.data = data;
this.context = context;
}
#Override
public int getCount() {
return data.length();
}
#Override
public Object getItem(int position) {
try {
return data.get(position);
} catch (JSONException e) {
e.printStackTrace();
return null;
}
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(R.layout.loading_orderlist, parent, false);
ImageView product_images=(ImageView) row.findViewById(R.id.product_images);
TextView Total_quantity = (TextView) row.findViewById(R.id.Total_quantity);
TextView order_status=(TextView) row.findViewById(R.id.order_status);
TextView order_date = (TextView) row.findViewById(R.id.order_date);
TextView order_id = (TextView) row.findViewById(R.id.order_id);
TextView product_Name=(TextView) row.findViewById(R.id.product_Name);
try {
JSONObject temp = data.getJSONObject(position);
Picasso.with(context).load(WebConnection.getInstance().resource_url(temp.getString("imgUrl"))).into(product_images);
Total_quantity.setText(temp.getString("Quantity"));
order_date.setText(temp.getString("Date_Sub"));
order_id.setText("#"+temp.getString("Order_ID"));
order_status.setText(temp.getString("Status"));
product_Name.setText(temp.getString("Name"));
} catch (JSONException e) {
e.printStackTrace();
}
return row;
}
}
And a class called:
public class LoadOrders extends ActionBarActivity implements Top_fragment.Top_fragmentListener {
private JSONArray data = null;
private JSONArray OrderDetails2 = null;
private ListView Normal_Orders_list;
private String previous_activity = "info.sliit.mystyle.Home";
private String title_name = "Your Normal Orders";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_promotional_wear);
Normal_Orders_list = (ListView)findViewById(R.id.Normal_Orders_list);
new BackgroundProcess().execute();
}
class BackgroundProcess extends AsyncTask<Void,Void,Void> {
ProgressDialog progressDialog = new ProgressDialog(LoadOrders.this);
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog.setMessage("Loading data...");
progressDialog.setIndeterminate(false);
progressDialog.setCancelable(true);
progressDialog.show();
}
#Override
protected Void doInBackground(Void... params) {
data = WebConnection.getInstance().get_request("Loading_order_rest/orderloading/user_id/12","json");
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
progressDialog.dismiss();
BaseAdapter baseAdapter1 = new LoadOrders_adapter(data,LoadOrders.this);
Normal_Orders_list.setAdapter(baseAdapter1);
//Normal_Orders_list.setOnItemClickListener();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_customized_orders,menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public String get_previous_activity() {
return previous_activity;
}
#Override
public String getTitle_name() {
return title_name;
}
}
I have an activity called Activity_loading_orders which has a list view called Normal_Orders_list and i have another layout called loading_orderlist which has has a RelativeLayout with some Textviews and a button. As you can see in the code the layout loading_orderlist is loaded as an list item into the Normal_Orders_list activity. What i want to do is to remove list items when the button is clicked see image http://i.imgur.com/TYAqd0t.jpg
My Jason taken from postman
<?xml version="1.0" encoding="utf-8"?>
<xml><data><datum><Order_ID>8</Order_ID><Quantity>52</Quantity><Comment>fs</Comment><Date_Sub>2015-08-27</Date_Sub><Date_Del/><Product_ID/><Customer_ID>12</Customer_ID><Status>Accepted</Status><View>Unread</View><Name>T-shirt</Name><imgUrl>\assets\images\projectpics\normalt\Edited_front.jpg</imgUrl></datum><datum><Order_ID>10</Order_ID><Quantity>45</Quantity><Comment>sf</Comment><Date_Sub>2015-08-27</Date_Sub><Date_Del/><Product_ID/><Customer_ID>12</Customer_ID><Status>Accepted</Status><View>Unread</View><Name>T-shirt</Name><imgUrl>\assets\images\projectpics\normalt\Edited_front.jpg</imgUrl></datum></data></xml>
Consider moving the JSON parsing outside of getView(). What you're going to want to do is:
Have a (preferably) List of <ParsedJsonObject> (from parsing the JSON) instead of a JsonArray
On 'cancel' click: delete item at position from the List
After deleting the item from the list, notify your adapter that it's dataset has changed: mListViewAdapter.notifyDataSetChanged();
Please note: I'm afraid you're going to have to change to a custom ArrayAdapter instead of a BaseAdapter. The reason for this is that you are using a JSONArray as the data set for the adapter. It's not a good idea to start messing with the JSON yourself, but you're going to have to remove the item from the dataset one way or another. I recommend you take a look at libraries such as gson or Genson.
Those libraries can deserialize JSON into Java objects for you. So what'd you'd end up doing:
Fetch JSON data
Deserialize JSON data into Java objects, put these objects into a List<ParsedJsonObject>
Create a new ArrayAdapter<ParsedJsonObject>
Pass along the list of ParsedJsonObjects as the dataset for the ArrayAdapter you just created.
getView() won't have to change a lot, just change where the data comes from. getView() lets you know what position you are in, and considering you passed along a List<ParsedJsonObject>, you can just do list.get(position) to return an object containing all the data.
I hope this helped!
All right, so here's what you need to do:
Create new classes: DataModel.java, Data.java, and Datum.java
Put this in them:
DataModel.java:
public class DataModel {
private Data data;
public Data getData ()
{
return data;
}
public void setData (Data data)
{
this.data = data;
}
}
Data.java:
public class Data {
private Datum[] datum;
public Datum[] getDatum ()
{
return datum;
}
public void setDatum (Datum[] datum)
{
this.datum = datum;
}
}
Datum.java:
public class Datum{
private String Name;
private String View;
private String Status;
private String Quantity;
private String Date_Sub;
private String Comment;
private String Customer_ID;
private String Order_ID;
private String imgUrl;
public String getName ()
{
return Name;
}
public void setName (String Name)
{
this.Name = Name;
}
public String getView ()
{
return View;
}
public void setView (String View)
{
this.View = View;
}
public String getStatus ()
{
return Status;
}
public void setStatus (String Status)
{
this.Status = Status;
}
public String getQuantity ()
{
return Quantity;
}
public void setQuantity (String Quantity)
{
this.Quantity = Quantity;
}
public String getDate_Sub ()
{
return Date_Sub;
}
public void setDate_Sub (String Date_Sub)
{
this.Date_Sub = Date_Sub;
}
public String getComment ()
{
return Comment;
}
public void setComment (String Comment)
{
this.Comment = Comment;
}
public String getCustomer_ID ()
{
return Customer_ID;
}
public void setCustomer_ID (String Customer_ID)
{
this.Customer_ID = Customer_ID;
}
public String getOrder_ID ()
{
return Order_ID;
}
public void setOrder_ID (String Order_ID)
{
this.Order_ID = Order_ID;
}
public String getImgUrl ()
{
return imgUrl ;
}
public void setImgUrl (String imgUrl)
{
this.imgUrl = imgUrl;
}
}
And then in your class do Data d = genson.deserialize(jsonString, DataModel.class);
Inside DataModel is a Data instance and inside that is your array of datum's

Data does not display properly in Adapter when Removing/Adding

I am running into an issue where I use 2 separate adapters, and 2 seperate GridViews (1 Adapter, for 1 GridView), and am basically removing items from either adapter, and adding it to the other if the item is pressed, and vice versa.
When I press and item in one GridView, the item will be removed from its respective adapter and put into the other GridView and its respective adapter. The issue seems to be with the way the data is being stored (potentially) because when I add the item to the adapter, the icons are totally different from what they should be.
Note: I also noticed that this only happens for the items pressed after the first one is pressed. So the first items data will be added/removed properly. However, I have found that when the item that takes on the first position of the associated adapter, will now have the icon of the previously removed item.
What can I do so ensure that the data stays consistent with the item that is pressed?.
Adapter Class
public class MiscChargeOptionsAdapter extends ArrayAdapter<CarClassSettingDetails> {
private LayoutInflater inflater;
public MiscChargeOptionsAdapter(Context context, List<CarClassSettingDetails> settingList) {
super(context, R.layout.misc_charge_option_layout, R.id.option_grid_option_text, settingList);
inflater = LayoutInflater.from(context);
}
#SuppressLint("InflateParams")
#Override
public View getView(int position, View convertView, ViewGroup parent) {
CarClassSettingDetails settingsDetails = this.getItem(position);
ViewHolder vh;
if (convertView == null) {
vh = new ViewHolder();
convertView = inflater.inflate(R.layout.misc_charge_option_layout, null);
vh.optionText = (TextView) convertView.findViewById(R.id.option_grid_option_text);
vh.settingView = (SettingView) convertView.findViewById(R.id.option_grid_option_icon);
convertView.setTag(vh);
} else {
vh = (ViewHolder) convertView.getTag();
}
vh.optionText.setText(settingsDetails.getName());
vh.settingView.setIcon(settingsDetails.getIcon());
vh.settingView.setIconSelected(settingsDetails.getIconSelected());
vh.settingView.setViewBackgroundColor(settingsDetails.getViewBackgroundColor());
vh.settingView.setBackgroundColorSelected(settingsDetails.getBackgroundColorSelected());
vh.settingView.setAmountBackgroundColor(settingsDetails.getAmountBackgroundColor());
vh.settingView.setAmountTextColor(settingsDetails.getAmountTextColor());
vh.settingView.setValue(settingsDetails.getValue());
vh.settingView.setIgnoreSetState(true);
vh.settingView.setTag(position);
return convertView;
}
class ViewHolder {
private TextView optionText;
private SettingView settingView;
/* public ViewHolder(TextView optionText, SettingView settingView) {
this.optionText = optionText;
this.settingView = settingView;
}*/
public TextView getOptionText() {
return optionText;
}
public SettingView getSettingView() {
return settingView;
}
}
}
How the adapters are set
selectedAdapter = new CarClassOptionsAdapter(getActivity(), selectedSettingsList);
unselectedAdapter = new CarClassOptionsAdapter(getActivity(), unselectedSettingsList);
gridSelected.setAdapter(selectedAdapter);
gridSelected.setOnItemClickListener(this);
gridUnselected.setAdapter(unselectedAdapter);
gridUnselected.setOnItemClickListener(this);
How I am adding/removing items from the adapters
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (parent.getAdapter() == selectedAdapter) {
//TODO: ADD DIALOGS
unselectedAdapter.add(selectedAdapter.getItem(position));
unselectedAdapter.notifyDataSetChanged();
selectedAdapter.remove(selectedAdapter.getItem(position));
selectedAdapter.notifyDataSetChanged();
} else if (parent.getAdapter() == unselectedAdapter) {
//TODO: ADD DIALOGS
selectedAdapter.add(unselectedAdapter.getItem(position));
selectedAdapter.notifyDataSetChanged();
unselectedAdapter.remove(unselectedAdapter.getItem(position));
unselectedAdapter.notifyDataSetChanged();
}
}
This is how the CarClassSettingDetails class is being populated
private void addMiscChargeSelected(Ws_MiscChargeSelected miscChargeSelected, boolean isSelected) {
try {
CarClassSettingDetails settingDetails = new CarClassSettingDetails(getActivity());
if (miscChargeSelected.getCode() != null && !miscChargeSelected.getCode().equals("")) {
settingDetails.setCode(miscChargeSelected.getCode());
}
if (miscChargeSelected.getName() != null && !miscChargeSelected.getName().equals("")) {
settingDetails.setName(miscChargeSelected.getName());
}
if (miscChargeSelected.getIcon() != null && !miscChargeSelected.getIcon().equals("")) {
Bitmap settingIcon = IconUtils.loadIcon(getActivity(), miscChargeSelected.getIcon());
Bitmap settingIconSelected = IconUtils.loadIcon(getActivity(), miscChargeSelected.getIcon());
settingDetails.setIcon(settingIcon);
settingDetails.setIconSelected(settingIconSelected);
}
if (miscChargeSelected.getValue() != null && !miscChargeSelected.getValue().equals("")) {
settingDetails.setValue(Ws_Value.fromInt(Integer.parseInt(miscChargeSelected.getValue())));
settingDetails.setAmountBackgroundColor(Color.parseColor("#00ffffff"));
settingDetails.setAmountTextColor(Color.parseColor("#ff00428e"));
} else {
settingDetails.setValue(null);
}
settingDetails.setViewBackgroundColor(Color.parseColor("#ffd4d4d4"));
settingDetails.setBackgroundColorSelected(Color.parseColor("#ff616161"));
if (isSelected) {
//TODO: ADD TO TOP ADAPTER
selectedSettingsList.add(settingDetails);
} else {
//TODO: ADD TO BOTTOM ADAPTER
unselectedSettingsList.add(settingDetails);
}
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
}
Misc Charge Details
public class MiscChargeSettingDetails {
private Context context;
private String code;
private String name;
private String description;
private Bitmap icon = null;
private Bitmap iconSelected = null;
private Ws_Value value = null;
private int amountBackgroundColor, amountTextColor, viewBackgroundColor, backgroundColorSelected;
public MiscChargeSettingDetails(Context context) {
this.context = context;
}
protected Context getContext() {
return context;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Bitmap getIcon() {
return icon;
}
public void setIcon(Bitmap icon) {
this.icon = icon;
}
public Bitmap getIconSelected() {
return iconSelected;
}
public void setIconSelected(Bitmap iconSelected) {
this.iconSelected = iconSelected;
}
public Ws_Value getValue() {
return value;
}
public void setValue(Ws_Value value) {
this.value = value;
}
public int getAmountBackgroundColor() {
return amountBackgroundColor;
}
public void setAmountBackgroundColor(int amountBackgroundColor) {
this.amountBackgroundColor = amountBackgroundColor;
}
public int getAmountTextColor() {
return amountTextColor;
}
public void setAmountTextColor(int amountTextColor) {
this.amountTextColor = amountTextColor;
}
public int getViewBackgroundColor() {
return viewBackgroundColor;
}
public void setViewBackgroundColor(int viewBackgroundColor) {
this.viewBackgroundColor = viewBackgroundColor;
}
public int getBackgroundColorSelected() {
return backgroundColorSelected;
}
public void setBackgroundColorSelected(int backgroundColorSelected) {
this.backgroundColorSelected = backgroundColorSelected;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
}
Can you show the place where you're populating the list of SettingViews? Is your data model (SettingView) extends View? It is not the best idea to use the view object as model..

How to show Images in Gridview using pulltorefresh class

I can show images in gridview normally. However, I want to use pulltorefresh functionality and I found a library to get the functionality. I am confused how to integrate my images.
Now, the gridview just shows imagelinks in the array. How can I use imageAdapter instead of arrayAdapter to show the Images?
Thanks a lot.
This is the activity class:
public final class PullToRefreshGridActivity extends Activity {
static final int MENU_SET_MODE = 0;
private LinkedList<String> mListItems;
private PullToRefreshGridView mPullRefreshGridView;
private GridView mGridView;
private ArrayAdapter<String> mAdapter;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ptr_grid);
mPullRefreshGridView = (PullToRefreshGridView) findViewById(R.id.pull_refresh_grid);
mGridView = mPullRefreshGridView.getRefreshableView();
// Set a listener to be invoked when the list should be refreshed.
mPullRefreshGridView.setOnRefreshListener(new OnRefreshListener2<GridView>() {
#Override
public void onPullDownToRefresh(PullToRefreshBase<GridView> refreshView) {
Toast.makeText(PullToRefreshGridActivity.this, "Pull Down!", Toast.LENGTH_SHORT).show();
new GetDataTask().execute();
}
#Override
public void onPullUpToRefresh(PullToRefreshBase<GridView> refreshView) {
Toast.makeText(PullToRefreshGridActivity.this, "Pull Up!", Toast.LENGTH_SHORT).show();
new GetDataTask().execute();
}
});
mListItems = new LinkedList<String>();
TextView tv = new TextView(this);
tv.setGravity(Gravity.CENTER);
tv.setText("Empty View, Pull Down/Up to Add Items");
mPullRefreshGridView.setEmptyView(tv);
mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mListItems);
mGridView.setAdapter(mAdapter);
}
private class GetDataTask extends AsyncTask<Void, Void, String[]> {
#Override
protected String[] doInBackground(Void... params) {
// Simulates a background job.
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
}
return mStrings;
}
#Override
protected void onPostExecute(String[] result) {
mListItems.addFirst("Added after refresh...");
mListItems.addAll(Arrays.asList(result));
mAdapter.notifyDataSetChanged();
// Call onRefreshComplete when the list has been refreshed.
mPullRefreshGridView.onRefreshComplete();
super.onPostExecute(result);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0, MENU_SET_MODE, 0,
mPullRefreshGridView.getMode() == Mode.BOTH ? "Change to MODE_PULL_DOWN"
: "Change to MODE_PULL_BOTH");
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
MenuItem setModeItem = menu.findItem(MENU_SET_MODE);
setModeItem.setTitle(mPullRefreshGridView.getMode() == Mode.BOTH ? "Change to MODE_PULL_FROM_START"
: "Change to MODE_PULL_BOTH");
return super.onPrepareOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_SET_MODE:
mPullRefreshGridView
.setMode(mPullRefreshGridView.getMode() == Mode.BOTH ? Mode.PULL_FROM_START
: Mode.BOTH);
break;
}
return super.onOptionsItemSelected(item);
}
private String[] mStrings = {"https://lh6.googleusercontent.com/-55osAWw3x0Q/URquUtcFr5I/AAAAAAAAAbs/rWlj1RUKrYI/s1024/A%252520Photographer.jpg",
"https://lh4.googleusercontent.com/--dq8niRp7W4/URquVgmXvgI/AAAAAAAAAbs/-gnuLQfNnBA/s1024/A%252520Song%252520of%252520Ice%252520and%252520Fire.jpg",
"https://lh5.googleusercontent.com/-7qZeDtRKFKc/URquWZT1gOI/AAAAAAAAAbs/hqWgteyNXsg/s1024/Another%252520Rockaway%252520Sunset.jpg",
"https://lh3.googleusercontent.com/--L0Km39l5J8/URquXHGcdNI/AAAAAAAAAbs/3ZrSJNrSomQ/s1024/Antelope%252520Butte.jpg",
"https://lh6.googleusercontent.com/-8HO-4vIFnlw/URquZnsFgtI/AAAAAAAAAbs/WT8jViTF7vw/s1024/Antelope%252520Hallway.jpg",
"https://lh4.googleusercontent.com/-WIuWgVcU3Qw/URqubRVcj4I/AAAAAAAAAbs/YvbwgGjwdIQ/s1024/Antelope%252520Walls.jpg",
"https://lh6.googleusercontent.com/-UBmLbPELvoQ/URqucCdv0kI/AAAAAAAAAbs/IdNhr2VQoQs/s1024/Apre%2525CC%252580s%252520la%252520Pluie.jpg",
"https://lh3.googleusercontent.com/-s-AFpvgSeew/URquc6dF-JI/AAAAAAAAAbs/Mt3xNGRUd68/s1024/Backlit%252520Cloud.jpg",
"https://lh5.googleusercontent.com/-bvmif9a9YOQ/URquea3heHI/AAAAAAAAAbs/rcr6wyeQtAo/s1024/Bee%252520and%252520Flower.jpg",
"https://lh5.googleusercontent.com/-n7mdm7I7FGs/URqueT_BT-I/AAAAAAAAAbs/9MYmXlmpSAo/s1024/Bonzai%252520Rock%252520Sunset.jpg",
"https://lh6.googleusercontent.com/-4CN4X4t0M1k/URqufPozWzI/AAAAAAAAAbs/8wK41lg1KPs/s1024/Caterpillar.jpg",
"https://lh3.googleusercontent.com/-rrFnVC8xQEg/URqufdrLBaI/AAAAAAAAAbs/s69WYy_fl1E/s1024/Chess.jpg",
"https://lh5.googleusercontent.com/-WVpRptWH8Yw/URqugh-QmDI/AAAAAAAAAbs/E-MgBgtlUWU/s1024/Chihuly.jpg",};
}
Create a custom Adapter, where you refresh each cell. Create an object which contains a String and Image property, in GetDataTask create an ArrayList of all those new objects and refresh your adapter.
Heres a simple example of the adapter and object
public class CustomStepsAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<CustomObject> details;
private LayoutInflater mInflater;
public CustomStepsAdapter(Context aContext, ArrayList<CustomObject> data) {
this.details = data;
this.mContext = aContext;
mInflater = LayoutInflater.from(aContext);
}
public int getCount() {
return details.size();
}
public CustomObject getItem(int position) {
return details.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView() {
return mInflater.inflate(R.layout.custom_step_options_cell, null);
}
public View getView(int position, View convertView, ViewGroup parent) {
final CustomObject item = getItem(position);
CustomStepCell cell = null;
if (convertView == null) {
convertView = getView();
cell = new CustomStepCell();
cell.itemName = (TextView) convertView.findViewById(R.id.option_name);
cell.image = (ImageView) convertView.findViewById(R.id.green_checkmark);
convertView.setTag(cell);
}
else
{
cell = (CustomStepCell) convertView.getTag();
}
cell.itemName.setText(item.getItemName());
cell.image = item.getImage();
return convertView;
}
public boolean isShowPrices() {
return showPrices;
}
public void setShowPrices(boolean showPrices) {
this.showPrices = showPrices;
}
public static class CustomStepCell
{
public TextView itemName;
public ImageView image;
}
}
public class CustomObject
{
private String itemName;
private ImageView image;
public CustomObject()
{
this.itemName = "";
}
public void setImage(ImageView anImage)
{
this.image = anImage;
}
public void setItemName(String anItemName)
{
this.itemName = anItemName;
}
public ImageView getImage()
{
return this.image;
}
public String getItemName()
{
return this.itemName;
}
}

Categories

Resources