Hi guys I have a problem with my ListView...
This is my code:
private ArrayAdapter<String> adapter ;
private ProgressDialog m_ProgressDialog = null;
private ArrayList<Order> m_orders = null;
public OrderAdapter m_adapter;
private Runnable viewOrders;
public class Order {
private String orderName;
private String orderStatus;
public String getOrderName() {
return orderName;
}
public void setOrderName(String orderName) {
this.orderName = orderName;
}
public String getOrderStatus() {
return orderStatus;
}
public void setOrderStatus(String orderStatus) {
this.orderStatus = orderStatus;
}
}
private class OrderAdapter extends ArrayAdapter<Order> {
private ArrayList<Order> items;
public OrderAdapter(Context context, int textViewResourceId, ArrayList<Order> items) {
super(context, textViewResourceId, items);
this.items = items;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.list_single, null);
}
Order o = items.get(position);
if (o != null) {
// TextView tv2 = (TextView) v.findViewById(R.id.tv2);
TextView tv1 = (TextView) v.findViewById(R.id.tv1); //codice volo
TextView tv2 = (TextView) v.findViewById(R.id.tv2); // citta
TextView tv5 = (TextView) v.findViewById(R.id.tv5); //stato volo
TextView tv6 = (TextView) v.findViewById(R.id.tv6); //ora prevista
TextView tv7 = (TextView) v.findViewById(R.id.tv7); //ora stimata if (tt != null) {
tv1.setText("VOLO: "+o.getOrderName());
}
return v;
}
}
private void getOrders(){
try{
m_orders = new ArrayList<Order>();
Order o1 = new Order();
o1.setOrderName("SF services");
o1.setOrderStatus("Pending");
Order o2 = new Order();
o2.setOrderName("SF Advertisement");
o2.setOrderStatus("Completed");
m_orders.add(o1);
m_orders.add(o2);
Thread.sleep(2000);
Log.i("ARRAY", ""+ m_orders.size());
} catch (Exception e) {
Log.e("BACKGROUND_PROC", e.getMessage());
}
runOnUiThread(returnRes);
}
public LayoutInflater getSystemService(String layoutInflaterService) {
// TODO Auto-generated method stub
return null;
}
private Runnable returnRes = new Runnable() {
#Override
public void run() {
if(m_orders != null && m_orders.size() > 0){
m_adapter.notifyDataSetChanged();
for(int i=0;i<m_orders.size();i++)
m_adapter.add(m_orders.get(i));
}
m_ProgressDialog.dismiss();
m_adapter.notifyDataSetChanged();
}
};
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View ios = inflater.inflate(R.layout.arrivi, container, false);
m_orders = new ArrayList<Order>();
this.m_adapter = new OrderAdapter(getActivity(), R.layout.list_single, m_orders);
setListAdapter(getActivity(),m_adapter);
viewOrders = new Runnable(){
#Override
public void run() {
getOrders();
}
};
Thread thread = new Thread(null, viewOrders, "MagentoBackground");
thread.start();
m_ProgressDialog = ProgressDialog.show(getActivity(),
"Please wait...", "Retrieving data ...", true);
// new MyTask().execute("");
return ios;
}
private void setListAdapter(FragmentActivity activity,
OrderAdapter m_adapter2) {
// TODO Auto-generated method stub
}
In eclipse I get this error:
The method runOnUiThread(Runnable) is undefined for the type arrivi
This code isn't in MainActivity but in a fragment named arrivi.
The file XML is list_single.xml and is associated at custom rows!
Can you help me please?
Another question...
How to implement AsyncTask for replacing Thread?
public class MyTask extends AsyncTask<String, Void, String> {
ProgressDialog prog;
String info;
.... When I run my app... it's in loop in "Retrieving data ..."
Thank you so much!!
runOnUiThread is a method of Activity subclasses. Inside a Fragment :
getActivity().runOnUiThread(runnable);
You need to create an instance for AsyncTask like this and execute your program on background.
new AsyncTask<Void, Integer, Long>(){
#Override
protected Long doInBackground(Void... params) {
try {
// call you method here
} catch (Exception ex) {
// handle the exception here
}
return null;
}
}.execute();
runOnUiThread is used to execute some program in main Thread. When you call runOnUiThread , the action will be executed immediately if we are already in UIThread else will be posted in Queue.
You need to use the Activity Context associated with your Fragment to `runOnUiThread'.
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
// execute your code here
}
});
Related
I am making a news feed where I retrieve Facebook posts from a specific Facebook page. I retrieve those posts with help of the Facebook Graph API. I have a FeedItem which has an ID (int). The ID is also used to check which item is at the current position (Recyclerview).
The problem is that Facebook gives the posts a String ID. I have no idea how I can possibly convert this so that it will work with my application.
My Adapter:
public class FeedListAdapter extends RecyclerView.Adapter<FeedListAdapter.ViewHolder> {
private ImageLoader imageLoader = AppController.getInstance().getImageLoader();
private List<FeedItem> mFeedItems;
private Context mContext;
public FeedListAdapter(List<FeedItem> pFeedItems, Context pContext) {
this.mFeedItems = pFeedItems;
this.mContext = pContext;
}
/* Create methods for further adapter use.*/
#Override
public ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
View feedView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.feed_item, parent, false);
return new ViewHolder(feedView);
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
holder.populateRow(getFeedItem(position));
}
#Override
public long getItemId(int position) {
return mFeedItems.get(position).getId();
}
#Override
public int getItemCount() {
return mFeedItems.size();
}
private FeedItem getFeedItem(int position) {
return mFeedItems.get(position);
}
class ViewHolder extends RecyclerView.ViewHolder implements OnClickListener {
private ImageView mProfilePic;
private TextView mName;
private TextView mTimestamp;
private TextView mTxtStatusMsg;
private FeedImageView mFeedImage;
//initialize the variables
ViewHolder(View view) {
super(view);
mProfilePic = (ImageView) view.findViewById(R.id.feedProfilePic);
mName = (TextView) view.findViewById(R.id.feedName);
mTimestamp = (TextView) view.findViewById(R.id.feedTimestamp);
mTxtStatusMsg = (TextView) view.findViewById(R.id.feedStatusMessage);
mFeedImage = (FeedImageView) view.findViewById(R.id.feedImage);
view.setOnClickListener(this);
}
#Override
public void onClick(View view) {
}
private void populateRow(FeedItem pFeedItem) {
getProfilePic(pFeedItem);
mName.setText(pFeedItem.getName());
mTimestamp.setText(pFeedItem.getTimeStamp());
mTxtStatusMsg.setText(pFeedItem.getStatus());
getStatusImg(pFeedItem);
}
private void getProfilePic(FeedItem pFeedItem) {
imageLoader.get(pFeedItem.getProfilePic(), new ImageListener() {
#Override
public void onResponse(ImageContainer response, boolean arg1) {
if (response.getBitmap() != null) {
// load image into imageview
mProfilePic.setImageBitmap(response.getBitmap());
}
}
#Override
public void onErrorResponse(final VolleyError pVolleyError) {
}
});
}
private void getStatusImg(FeedItem pFeedItem) {
if (pFeedItem.getImage() != null) {
mFeedImage.setImageUrl(pFeedItem.getImage(), imageLoader);
mFeedImage.setVisibility(View.VISIBLE);
mFeedImage
.setResponseObserver(new FeedImageView.ResponseObserver() {
#Override
public void onError() {
}
#Override
public void onSuccess() {
}
});
} else {
mFeedImage.setVisibility(View.GONE);
}
}
}
My FeedFragment:
public class FeedFragment extends android.support.v4.app.Fragment {
private static final String TAG = FeedFragment.class.getSimpleName();
private FeedListAdapter mListAdapter;
private List<FeedItem> mFeedItems;
private RecyclerView mRecyclerView;
private String FACEBOOKURL = "**URL OF MY FB-POSTDATA**";
// newInstance constructor for creating fragment with arguments
public static FeedFragment newInstance() {
FeedFragment fragment = new FeedFragment();
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout resource file
View view = getActivity().getLayoutInflater().inflate(R.layout.fragment_feed, container, false);
initRecyclerView(view);
initCache();
return view;
}
#Override
public void onStart() {
super.onStart();
}
#Override
public void onResume() {
super.onResume();
}
private void initRecyclerView(View pView) {
mRecyclerView = (RecyclerView) pView.findViewById(R.id.fragment_feed_recyclerview);
LayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setHasFixedSize(false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mRecyclerView.setNestedScrollingEnabled(true);
}
mFeedItems = new ArrayList<>();
mListAdapter = new FeedListAdapter(mFeedItems, getActivity());
mRecyclerView.setAdapter(mListAdapter);
}
private void initCache() {
// We first check for cached request
Cache cache = AppController.getInstance().getRequestQueue().getCache();
Entry entry = cache.get(FACEBOOKURL);
if (entry != null) {
// fetch the data from cache
try {
String data = new String(entry.data, "UTF-8");
try {
parseJsonFeed(new JSONObject(data));
} catch (JSONException e) {
e.printStackTrace();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
} else {
// making fresh volley request and getting json
JsonObjectRequest jsonReq = new JsonObjectRequest(Method.GET,
FACEBOOKURL, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
VolleyLog.d(TAG, "Response: " + response.toString());
if (response != null) {
parseJsonFeed(response);
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
}
});
// Adding request to volley request queue
AppController.getInstance().addToRequestQueue(jsonReq);
}
}
private void parseJsonFeed(JSONObject response) {
try {
JSONArray feedArray = response.getJSONArray("data");
for (int i = 0; i < feedArray.length(); i++) {
JSONObject feedObj = (JSONObject) feedArray.get(i);
FeedItem item = new FeedItem();
item.setId(Integer.parseInt(feedObj.getString("id")));
item.setName("name of page");
// Image might be null sometimes
String image = feedObj.isNull("full_picture") ? null : feedObj
.getString("full_picture");
item.setImage(image);
// Status message might be null sometimes
String status = feedObj.isNull("message") ? null : feedObj
.getString("message");
item.setStatus(status);
item.setProfilePic("**profile picture url**");
item.setTimeStamp(feedObj.getString("created_time"));
mFeedItems.add(item);
}
// notify data changes to list adapter
mListAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
} }
As I said; I have no idea how to handle this and I figured someone here would maybe have an idea on how to convert this, so that I can use the String that the graph api gives me, and use it as an integer.
If the id is all numeric, you should be able to do this: int id = Integer.valueOf(facebookId)
If you have an undescore you can try this:
public int getIdFromString(String postId) {
String finalId;
while (postId.indexOf("_") > 0) {
finalId = postId.substring(0, postId.indexOf("_"));
postId = finalId.concat(postId.substring(postId.indexOf("_") + 1));
}
return Integer.valueOf(postId);
}
If the value is numeric and you want an integer object, do
Integer id = Integer.valueOf(facebookId);
If you want the primitive type int, then do
int id = Integer.parseInt(facebookId);
or
int id = Integer.valueOf(facebookId);
[EDIT] I'm new to android development, so please bear with me. I have two java classes named Join Game, extends to AppCompatActivity and HintList,extends to ArrayAdapter<>. This is connected to a database. So maybe its one of the factors?
For the layout of join game, I have a listview
and for the layout of hintlist I have three textview.
The code goes this way
JoinGame
public class JoinGame extends AppCompatActivity {
ListView list;
String[] itemdescription = {};
String[] itemhints = {};
String[] itemlocasyon = {};
ProgressDialog progress;
View view;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_joingame);
Button schan = (Button)findViewById(R.id.tarascan);
schan.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(JoinGame.this,ScanActivity.class);
startActivity(intent);
}
});
}
#Override
protected void onStart() {
super.onStart();
progress = new ProgressDialog(this);
progress.setMessage("Connecting...");
progress.setCancelable(false);
progress.show();
RequestFactory.joingameitems(JoinGame.this, RequestFactory.user_id, new RequestCallback<JSONArray>() {
#Override
public void onSuccess(final JSONArray response) {
runOnUiThread(new Runnable() {
#Override
public void run() {
RequestFactory.response = response;
itemdescription = new String[response.length()];
itemhints = new String[response.length()];
itemlocasyon = new String[response.length()];
for (int hl = 0; hl < response.length(); hl++){
try{
itemdescription[hl] = ((String)(response.getJSONObject(hl)).get("description"));
itemhints[hl] = ((String)(response.getJSONObject(hl)).get("hint"));
itemlocasyon[hl] = ((String)(response.getJSONObject(hl)).get("location"));
} catch (JSONException e) {
e.printStackTrace();
}
} ////////// below this is the adapter
final HintList hladapt = new HintList(JoinGame.this,itemdescription,itemlocasyon,itemhints);
list = (ListView)findViewById(R.id.item_hints_and_location);
list.setAdapter(hladapt);
progress.dismiss();
}
});
}
#Override
public void onFailed(final String message) {
runOnUiThread(new Runnable() {
#Override
public void run() {
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(JoinGame.this, message, Toast.LENGTH_LONG).show();
progress.dismiss();
}
});
}
});
}
});
}
HintList
public class HintList extends ArrayAdapter<String> {
private final Activity context;
private String[] itemDesc = {};
private String[] itemHints = {};
private String[] itemLocation = {};
public HintList(Activity context,String[] itemDesc,String[] itemhints,String[] itemlocation) {
super(context,R.layout.hints_list);
this.context = context;
this.itemDesc = itemDesc;
itemHints = itemhints;
itemLocation = itemlocation;
}
#Override
public View getView(int position, View view, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View rowView = inflater.inflate(R.layout.hints_list, null, true);
TextView itemDesc2 = (TextView)rowView.findViewById(R.id.itemdescription);
TextView itemHint = (TextView)rowView.findViewById(R.id.itemhint);
TextView itemLocation2 = (TextView)rowView.findViewById(R.id.itemlocation);
itemDesc2.setText(itemDesc[position]);
itemHint.setText(itemHints[position]);
itemLocation2.setText(itemLocation[position]);
return rowView;
}
}
I actually retrieved the data (here)
E/DB: [{"description":"chinese garter","location":"near Tricycle station","hint":"garter plus chinese"},{"description":"isang pinoy game","location":"near ....","hint":"may salitang baka"},{"description":"\"tinik\"","location":"below...","hint":"may salitang tinik"},{"description":"aka Tinubigan","location":"at the back...","hint":"katunog ng pintero"},{"description":"\"knock down the can\"","location":"near...","hint":"gumagamit ng lata"}]
but it doesnt display on my listview
I dont know anymore what I should do.
I actually tried making this (I added view)
final HintList hladapt = new HintList(JoinGame.this,itemdescription,itemlocasyon,itemhints);
list = (ListView)view.findViewById(R.id.item_hints_and_location);
list.setAdapter(hladapt);
progress.dismiss();
but it will only returns an error of java.lang.NullPointerException: Attempt to invoke virtual method
Change this:
View rowView = inflater.inflate(R.layout.hints_list, null, true);
to:
View rowView = inflater.inflate(R.layout.hints_list, parent, false);
Modify your getView() method to:
#Override
public View getView(int position, View view, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View rowView = inflater.inflate(R.layout.hints_list, parent, false);
TextView itemDesc2 = (TextView)rowView.findViewById(R.id.itemdescription);
TextView itemHint = (TextView)rowView.findViewById(R.id.itemhint);
TextView itemLocation2 = (TextView)rowView.findViewById(R.id.itemlocation);
itemDesc2.setText(itemDesc[position]);
itemHint.setText(itemHints[position]);
itemLocation2.setText(itemLocation[position]);
return rowView;
}
try adding getCount
#Override
public int getCount() {
return itemHints.length;
}
Try to change your code to this
public class HintList extends ArrayAdapter<String> {
private final Activity context;
private String[] itemDesc = {};
private String[] itemHints = {};
private String[] itemLocation = {};
private LayoutInflater inflater=null;
public HintList(Activity context,String[] itemDesc,String[] itemhints,String[] itemlocation) {
super(context,R.layout.hints_list);
this.context = context;
this.itemDesc = itemDesc;
itemHints = itemhints;
itemLocation = itemlocation;
inflater = (LayoutInflater)this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return itemHints.length;
}
#Override
public View getView(int position, View view, ViewGroup parent) {
ViewHolder holder;
if (view==null){
view=inflater.inflate(R.layout.hints_list, null, true);
holder = new ViewHolder(view);
view.setTag(holder);
}else {
holder = (ViewHolder) view.getTag();
}
holder.itemDesc2.setText(itemDesc[position]);
holder.itemHint.setText(itemHints[position]);
holder.itemLocation2.setText(itemLocation[position]);
return view;
}
static class ViewHolder{
TextView itemDesc2,itemHint,itemLocation2;
ViewHolder(View view) {
itemDesc2 = (TextView)view.findViewById(R.id.itemdescription);
itemHint = (TextView)view.findViewById(R.id.itemhint);
itemLocation2 = (TextView)view.findViewById(R.id.itemlocation);
}
}
}
My suggestions is create a bean class (DetailsBean), used for setter and getter method, and also the ArrayList (details1).
List<DetailsBean> details1 = new ArrayList<>(); // declare this as global
Then add the bean to below code
public void run() {
RequestFactory.response = response;
itemdescription = new String[response.length()];
itemhints = new String[response.length()];
itemlocasyon = new String[response.length()];
for (int hl = 0; hl < response.length(); hl++){
try{
itemdescription[hl] = ((String)(response.getJSONObject(hl)).get("description"));
itemhints[hl] = ((String)(response.getJSONObject(hl)).get("hint"));
itemlocasyon[hl] = ((String)(response.getJSONObject(hl)).get("location"));
// here the bean
DetailsBean dbean = new DetailsBean(itemDescription, itemhints, itemlocasyon);
details1.add(dbean); // add all the data to details1 ArrayList
HintList hladapt = new HintList(getActivity(), details1);
(ListView)findViewById(R.id.item_hints_and_location);
list.setAdapter(hladapt);
} catch (JSONException e) {
e.printStackTrace();
}
}
Your DetailsBean should looked like this
public class DetailsBean {
private String itemDescription="";
private String itemhints="";
private String itemlocasyon ="";
public DetailsBean(String description, String hints, String itemlocasyon) {
this.itemDescription=description;
.....
}
public void setItemDescription(String itemDescription) {
this.itemDescription = itemDesription;
}
public String getItemDescription() {
return itemDescription;
}
....
}
Then your HintList
public class HintList extends BaseAdapter{
Activity context;
List<DetailsBean> details;
private LayoutInflater mInflater;
public CustomBaseAdapter(Activity context,List<DetailsBean> details) {
this.context = context;
this.details = details;
}
........
}
Add these Override methods in your adapter
#Override
public int getCount() {
return itemHints.length;
}
#Override
public Object getItem(int i) {
return i;
}
#Override
public long getItemId(int i) {
return i;
}
My recyclerview is not updating correctly after the back button is
pressed.
The recyclerview works fine before the back button is pressed
The data is properly updated (seen in the log) but the recyclerview does not reflect the change
The purpose of the handler is to poll the database for a notification (working fine)
The notification toast is displayed everytime
I am not receiving any errors
If I can provide any other information to help do not hesitate to ask.
Main:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat_room);
recView = (RecyclerView) findViewById(R.id.recyclerViewMessages);
linearLayoutManager = new LinearLayoutManager(this) {};
linearLayoutManager.setReverseLayout(true);
recView.setLayoutManager(linearLayoutManager);
listData = (ArrayList) MessagingData.getMessageListData();
adapter = new RecyclerViewAdapterMessaging(listData, this);
recView.setAdapter(adapter);
adapter.setItemClickCallback(this);
final Handler h = new Handler();
final int delay = 2000; //milliseconds
h.postDelayed(new Runnable(){
public void run(){
Notify_Message_Async notify_message_async = new Notify_Message_Async(ctx);
notify_message_async.execute(NOTIFICATION, message_id);
System.out.println(global.getNotification());
if(global.getNotification()==1){
Toast.makeText(ctx, "Notified",
Toast.LENGTH_LONG).show();
try {
refresh_receive();
} catch (ExecutionException e) {
Toast.makeText(ctx, "catch",
Toast.LENGTH_LONG).show();
e.printStackTrace();
} catch (InterruptedException e) {
Toast.makeText(ctx, "catch",
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
h.postDelayed(this, delay);
}
}, delay);
}
public void refresh_receive() throws ExecutionException, InterruptedException {
String method = "receive_message";
Receive_Live_Message_Async receive_live_message_async = new Receive_Live_Message_Async(this);
receive_live_message_async.execute(method, message_id).get();// Setup the message
adapter.setListData((ArrayList)MessagingData.getMessageListData());
adapter.notifyDataSetChanged();
global.setNotification(0);//reset notification
}
Adapter:
public class RecyclerViewAdapterMessaging extends RecyclerView.Adapter<RecyclerViewAdapterMessaging.Holder> {
private View v;
private List<List_Item_Messaging> listData;
private LayoutInflater inflater;
Global global = new Global();
private ItemClickCallback itemClickCallback;
Context context;
public interface ItemClickCallback {
void onItemClick(View v, int p);
void onSecondaryIconClick(int p);
}
public void setItemClickCallback(final ItemClickCallback itemClickCallback) {
this.itemClickCallback = itemClickCallback;
}
public RecyclerViewAdapterMessaging(List<List_Item_Messaging> listData, Context c) {
inflater = LayoutInflater.from(c);
context = c;
this.listData = listData;
}
#Override
public int getItemViewType(int position) {//0 for self... /1 for Other
List_Item_Messaging item = listData.get(position);
//ENSURE GLOBAL USERNAME NOT NULL
String other_username = item.getMessage_username();
if (other_username == null) {
((Activity) context).finish();
}
if (item.getMessage_username().trim().equals(global.getUserName())) {
System.out.println("The usernames are the same");
return 0;
} else {
System.out.println("The usernames are the NOT same");
return 1;
}
}
#Override
public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case 0:
View view = inflater.inflate(R.layout.chat_thread, parent, false);// Self
v = view;
break;
case 1:
View view2 = inflater.inflate(R.layout.chat_thread_other, parent, false);// Not self
int width2 = global.getScreenWidth();
v = view2;
break;
}
return new Holder(v);
}
#Override
public void onBindViewHolder(Holder holder, int position) {
List_Item_Messaging item = listData.get(position);
holder.conversation.setText(item.getMessage_conversation());
}
public void setListData(ArrayList<List_Item_Messaging> exerciseList) {
this.listData.clear();
this.listData.addAll(exerciseList);
}
#Override
public int getItemCount() {
return listData.size();
}
class Holder extends RecyclerView.ViewHolder implements View.OnClickListener {
ImageView thumbnail;
//ImageView secondaryIcon;
TextView conversation;
View message_container;
public Holder(View itemView) {
super(itemView);
conversation = (TextView) itemView.findViewById(R.id.conversation_textview);
message_container = itemView.findViewById(R.id.message_container);
message_container.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (v.getId() == R.id.message_container) {
itemClickCallback.onItemClick(v, getAdapterPosition());
} else {
itemClickCallback.onSecondaryIconClick(getAdapterPosition());
}
}
}
public void clearItems() {
listData.clear();
this.notifyDataSetChanged();
}
}
I have referenced the following to no solution:
notifyDataSetChanged not working on RecyclerView
smoothScrollToPosition after notifyDataSetChanged not working in android
adapter.notifyDataSetChange() not working after called from onResume()
change a little in your code
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat_room);
recView = (RecyclerView) findViewById(R.id.recyclerViewMessages);
linearLayoutManager = new LinearLayoutManager(this) {};
linearLayoutManager.setReverseLayout(true);
recView.setLayoutManager(linearLayoutManager);
// change here
if (listData != null)
listData.clear();
else listData = new <> ArrayList();
listData.addAdd((ArrayList)MessagingData.getMessageListData());
adapter = new RecyclerViewAdapterMessaging(listData, this);
recView.setAdapter(adapter);
adapter.setItemClickCallback(this);
final Handler h = new Handler();
final int delay = 2000; //milliseconds
then make a small change here
public void refresh_receive() throws ExecutionException, InterruptedException {
String method = "receive_message";
Receive_Live_Message_Async receive_live_message_async = new Receive_Live_Message_Async(this);
receive_live_message_async.execute(method, message_id).get();// Setup the message
// changing here
dataList.clear();
dataList.addAdd((ArrayList)MessagingData.getMessageListData())
adapter.setListData(dataList);
adapter.notifyDataSetChanged();
global.setNotification(0);//reset notification
}
another problem in your code, you are using receive_live_message_async AsyncTask
put your update code in onPostExecute
public class receive_live_message_async extends AsyncTask {
#Override
protected Object doInBackground(Object[] objects) {
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected void onPostExecute(Object o) {
// call your refresh_receive(); here
super.onPostExecute(o);
}
}
similarly when you are call receive_live_message_async.execute(); update your recyclerView in onPostExecute
#Override
protected void onPostExecute(Object o) {
dataList.clear();
dataList.addAll((ArrayList)MessagingData.getMessageListData());
adapter.notifyDataSetChanged();
super.onPostExecute(o);
}
I have this fragment called HomeFragment.java
The code is as follows:-
public class HomeFragment extends Fragment {
public HomeFragment(){}
String username, id;
ListView t1;
int idno;
JSONArray jsonArray;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
Intent intent = getActivity().getIntent();
t1 = (ListView) getActivity().findViewById(R.id.getInfo);
if(intent.getStringExtra("username") == null)
{
Intent intent1 = new Intent(getActivity(),LoginActivity.class);
startActivity(intent1);
}
else
{
username = intent.getStringExtra("username");
id = intent.getStringExtra("id");
idno = Integer.parseInt(id);
new getDetails().execute(new ApiConnector());
}
return rootView;
}
public void setListAdaptor(JSONArray jsonArray)
{
this.jsonArray = jsonArray;
t1.setAdapter(new GetAllInfoListView(jsonArray,getActivity()));
}
private class getDetails extends AsyncTask<ApiConnector,Long,JSONArray> {
#Override
protected JSONArray doInBackground(ApiConnector... params) {
return params[0].getDetails(idno);
}
#Override
protected void onPostExecute(JSONArray jsonArray) {
// TODO Auto-generated method stub
//setListAdaptor(jsonArray);
}
}
}
There are no compilation erros.
But when I run it i get a NullPointerException at --> t1.setAdapter(new GetAllInfoListView(jsonArray,getActivity()));
And this is my List Adaptor class:-
public class GetAllInfoListView extends BaseAdapter {
private JSONArray dataArray;
private Activity activity;
private static LayoutInflater inflator = null;
public GetAllInfoListView(JSONArray jsonArray, Activity a)
{
this.dataArray = jsonArray;
this.activity = a;
inflator = (LayoutInflater) this.activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return dataArray.length();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ListCell cell;
if(convertView == null)
{
convertView = inflator.inflate(R.layout.cell_layout, null);
cell = new ListCell();
cell.name = (TextView) convertView.findViewById(R.id.txt_name);
cell.age = (TextView) convertView.findViewById(R.id.txt_age);
cell.city = (TextView) convertView.findViewById(R.id.txt_city);
cell.airline = (ImageView) convertView.findViewById(R.id.airline_pick);
cell.dep_time = (TextView) convertView.findViewById(R.id.dep_time);
convertView.setTag(cell);
}
else
{
cell = (ListCell) convertView.getTag();
}
try {
JSONObject jsonObject = this.dataArray.getJSONObject(position);
cell.name.setText(jsonObject.getString("BKTBOARDCITY")+" - "+jsonObject.getString("BKTOFFCITY"));
cell.age.setText(jsonObject.getString("BKTAIRLINE"));
cell.city.setText(jsonObject.getString("BKTDEPDATE").substring(11));
cell.dep_time.setText(jsonObject.getString("BKTDEPDATE").substring(0,11));
String image = jsonObject.getString("BKTAIRLINE");
if(image.equals("Air India"))
{
cell.airline.setImageResource(R.drawable.airindia);
}
if(image.equals("Air Costa"))
{
cell.airline.setImageResource(R.drawable.aircosta);
}
if(image.equals("Go Airways"))
{
cell.airline.setImageResource(R.drawable.goairways);
}
if(image.equals("Indian Airlines"))
{
cell.airline.setImageResource(R.drawable.indianairline);
}
if(image.equals("Indigo"))
{
cell.airline.setImageResource(R.drawable.indigo);
}
if(image.equals("Jet Airways"))
{
cell.airline.setImageResource(R.drawable.jetairways);
}
if(image.equals("Jet Lite"))
{
cell.airline.setImageResource(R.drawable.jetlite);
}
if(image.equals("Kingfisher Airlines"))
{
cell.airline.setImageResource(R.drawable.kingfisher);
}
if(image.equals("Paramount Airways"))
{
cell.airline.setImageResource(R.drawable.paramount);
}
if(image.equals("Spice Jet"))
{
cell.airline.setImageResource(R.drawable.spicejet);
}
if(image.equals("United Airlines"))
{
cell.airline.setImageResource(R.drawable.unitedairlines);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return convertView;
}
private class ListCell
{
private TextView name;
private TextView age;
private TextView city;
private ImageView airline;
private TextView dep_time;
}
}
Please help. Thanks :D
This is wrong i think
t1 = (ListView) getActivity().findViewById(R.id.getInfo);
use like this
t1 = (ListView) rootView.findViewById(R.id.getInfo);
I'm trying to create a ListView with custom ArrayAdapter.
Following the example from here.
In the code below, I've created a ListActivity.
This list is getting its value from custom ArrayAdapter - OrderAdapter.
OrderAdapter is getting its elements from ArrayAdapter
I'm using runOnUiThread to fill the elements in adpater.
But inside this thread's run() method, the code is going into infinite loop. (See comments below).
Please check why it not getting out of the for loop.
Code:
public class SoftwarePassionView extends ListActivity {
private ProgressDialog m_progressDialog = null;
private ArrayList<Order> m_orders = null;
private OrderAdapter m_adapter; // Defined Below
private Runnable viewOrders;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.softwarepassionview);
m_orders = new ArrayList<Order>();
viewOrders = new Runnable() {
#Override
public void run() {
getOrders();
}
};
Thread thread = new Thread(null, viewOrders, "MagnatoBackground");
thread.start();
m_progressDialog = ProgressDialog.show(SoftwarePassionView.this, "Please Wait",
"Retriving data", true);
this.m_adapter = new OrderAdapter(this, R.layout.row, m_orders);
setListAdapter(this.m_adapter);
}
private void getOrders() {
try {
m_orders = new ArrayList<Order>();
Order o1 = new Order();
o1.setOrderName("T-Shirt Purchase");
o1.setOrderStatus("Dispatched");
Order o2 = new Order();
o2.setOrderName("Deo Purchase");
o2.setOrderStatus("Pending");
m_orders.add(o1);
m_orders.add(o2);
Thread.sleep(2000);
} catch (Exception e) {
Toast.makeText(this, e.toString(), Toast.LENGTH_SHORT).show();
}
runOnUiThread(returnRes);
}
private Runnable returnRes = new Runnable() {
#Override
public void run() {
if (m_orders != null && m_orders.size() > 0) {
m_adapter.notifyDataSetChanged();
/*
* Going in an infinite loop below
*/
for (int i = 0; i < m_orders.size(); i++)
m_adapter.add(m_orders.get(i));
}
m_progressDialog.dismiss();
m_adapter.notifyDataSetChanged();
}
};
private class OrderAdapter extends ArrayAdapter<Order> {
private ArrayList<Order> items;
public OrderAdapter(Context context, int textViewResourceId,
ArrayList<Order> items) {
super(context, textViewResourceId, items);
this.items = items;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
super.getView(position, convertView, parent);
View v = convertView;
try {
if (v == null) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
}
Order o = items.get(position);
if (o != null) {
TextView orderName = (TextView) v
.findViewById(R.id.topText);
TextView orderStatus = (TextView) v
.findViewById(R.id.bottomText);
orderName.setText(o.getOrderName());
orderStatus.setText(o.getOrderStatus());
}
} catch (Exception e) {
Toast.makeText(SoftwarePassionView.this, e.toString(),
Toast.LENGTH_SHORT).show();
}
return v;
}
}
}
Order.java
public class Order {
private String orderName;
private String orderStatus;
public String getOrderName() {
return orderName;
}
public void setOrderName(String orderName) {
this.orderName = orderName;
}
public String getOrderStatus() {
return orderStatus;
}
public void setOrderStatus(String orderStatus) {
this.orderStatus = orderStatus;
}
}
try this...
make a methode in OrderAdapter
setList(ArrayList<Order> items);
{
this.items.clear();
this.items.addAll(items);
notifyDataSetChanged();
}
and in run() of UI Thread do
if (m_orders != null && m_orders.size() > 0) {
m_adapter.setList(m_orders)
}
m_progressDialog.dismiss();
EDIT do some refracting of your code...make like this
in onCreat() new SampleTask().execute();
and
public class SampleTask extends AsyncTask{
#Override
protected void onPreExecute() {
super.onPreExecute();
//show progress bar here
}
#Override
protected Void doInBackground(Void... params) {
//Do heavy work here
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
//Dissmiss the dialgo
//call m_adapter.setList(m_orders)
}