Android delete item from Listview Imlemented Using Baseadapter

Android delete item from Listview Imlemented Using Baseadapter - android

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

Related

Common AsyncTask for Multiple Adapter Update List Item

I'm new in Android and I have following code that shows the list of item in Adapter.
I have Four Different Adapter from where I am calling one comman AsyncTask to update Result. I have implemented one Interface ApiResponse and overrides apiResponseProcessing() to get result.
In Item of List "Add to Cart" Button Added in every row. OnClick of that button I am requesting to server. On Success of that response i want to update Button with "Added To Cart".
I have question How to update that string which is binded in onBindViewHolder(). I am getting success in that method but dont know how to update clicked Button from that method.
Here's my Adapter
/**
* Adapter
**/
public class AlbumPhotoDetailAdapter
extends RecyclerView.Adapter<AlbumPhotoDetailAdapter.ViewHolder> implements ApiResponse {
private final ArrayList<Photo> mValues;
Album album;
private Activity mContext;
private int mMemberId;
public AlbumPhotoDetailAdapter(Activity context, ArrayList<Photo> items) {
mValues = items;
this.mContext = context;
mMemberId = MemberPreference.getMemberId(mContext);
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.album_photo_detail_sub_view, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
final Photo photo = mValues.get(position);
/**
* Album Owner Name
*/
String mOwnerName = photo.getOwnerName();
String mOwnerProfilePic = photo.getOwnerImage();
String mDateTime = photo.getDatetime();
String mPrice = String.valueOf(photo.getPrice());
/**
* Price String
*/
String priceStr = String.format(mContext.getString(R.string.string_dollar_price), mPrice);
holder.mAlbumPhotoDetailPhotoPrice.setText(priceStr);
/**
* Main Image
*/
Picasso.with(mContext).load(photo.getLink())
.error(R.drawable.ic_place_holder_circle)
.placeholder(R.drawable.ic_place_holder_circle)
.transform(new ImageTransformation(holder.mAlbumPhotoDetailSubMainImage))
.into(holder.mAlbumPhotoDetailSubMainImage);
/**
* Owner Name and Profile Pic
*/
holder.mAlbumPhotoDetailSubOwnerNameTextView.setText(mOwnerName);
Picasso.with(mContext).load(mOwnerProfilePic)
.error(R.drawable.ic_place_holder_circle)
.placeholder(R.drawable.ic_place_holder_circle)
.resize(100, 100)
.transform(new CircleTransform())
.into(holder.mAlbumPhotoDetailSubOwnerImage);
mDateTime = mDateTime != null ? DateUtils.getNiceTime(mDateTime) : "----";
holder.mAlbumPhotoDetailSubOwnerPostedTimeTextView.setText(mDateTime);
// Photo Add to cart.
holder.mAddToCartButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(InternetConnection.checkConnection(mContext)) {
new BackgroundAsyncTask(mContext, (ApiResponse) mContext, mMemberId, photo.getId()).execute();
} else {
DailyStudio.noInternetConnectionToast(mContext);
}
}
});
}
#Override
public int getItemCount() {
return mValues.size();
}
#Override
public void apiResponseProcessing(String response) {
Log.i(TAG,"Api Response : "+response);
if(response.equals(Fields.JSON_SUCCESS)) {
}
}
/**
* View Holder
*/
public static class ViewHolder extends RecyclerView.ViewHolder {
public final View mView;
private ImageView mAlbumPhotoDetailSubOwnerImage;
private ImageView mAlbumPhotoDetailSubMainImage;
private TextView mAlbumPhotoDetailSubOwnerNameTextView;
private TextView mAlbumPhotoDetailSubOwnerPostedTimeTextView;
private TextView mAlbumPhotoDetailPhotoPrice;
private TextView mAlbumPhotoDetailSubDescription;
private Button mAddToCartButton;
public ViewHolder(View view) {
super(view);
mView = view;
mAlbumPhotoDetailSubOwnerImage = (ImageView) view.findViewById(R.id.album_photo_detail_sub_owner_image);
mAlbumPhotoDetailSubMainImage = (ImageView) view.findViewById(R.id.album_photo_detail_sub_main_image);
mAlbumPhotoDetailSubOwnerNameTextView = (TextView) view.findViewById(R.id.album_photo_detail_sub_owner_name_text_view);
mAlbumPhotoDetailSubOwnerPostedTimeTextView = (TextView) view.findViewById(R.id.album_photo_detail_sub_owner_posted_time_text_view);
mAlbumPhotoDetailPhotoPrice = (TextView) view.findViewById(R.id.album_photo_detail_photo_price);
mAlbumPhotoDetailSubDescription = (TextView) view.findViewById(R.id.album_photo_detail_sub_description);
mAddToCartButton = (Button) view.findViewById(R.id.album_photo_detail_photo_add_to_cart_button);
}
}
}
Here's my Interface
/**
* Interface..
*/
public interface ApiResponse {
public void apiResponseProcessing(String response);
}
Here's my Background AsyncTask
/**
* Background AsyncTask...
*/
public class BackgroundAsyncTask extends AsyncTask<Void, Void, String> {
private Context context;
private String accessToken;
private int memberId;
private int photoId;
private ApiResponse objIBaseApi;
public BackgroundAsyncTask(Context context, ApiResponse apiResponse, int memberId, int photoId) {
this.context = context;
this.memberId = memberId;
this.photoId = photoId;
accessToken = MemberPreference.getAccessToken(context);
this.objIBaseApi = apiResponse;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(Void... params) {
JSONObject json = JSONParser.addToCartPhoto(accessToken, memberId, photoId);
if(json != null) {
Log.i(TAG,"First Json : "+json.toString());
try {
if (json.getString(Fields.RESULT).equalsIgnoreCase(Fields.JSON_SUCCESS)) {
return Fields.JSON_SUCCESS;
} else if(json.getString(Fields.JSON_ERROR).equalsIgnoreCase(Fields.ERROR_ACCESS_DENIED)) {
String refreshToken = MemberPreference.getRefreshToken(context);
JSONObject newJSONObject = JSONParser.loginMemberWithRefreshToken(refreshToken, Integer.toString(memberId));
if(newJSONObject != null) {
if(newJSONObject.getString(Fields.JSON_ERROR).equalsIgnoreCase(Fields.ERROR_ACCESS_DENIED)) {
return Fields.ERROR_ACCESS_DENIED;
} else {
return Fields.JSON_SUCCESS;
}
} else
return Fields.ERROR_ACCESS_DENIED;
} else {
return Fields.JSON_ERROR;
}
} catch (JSONException e) {
e.printStackTrace();
return Fields.JSON_ERROR;
}
}
return Fields.JSON_ERROR;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
objIBaseApi.apiResponseProcessing(result);
}
}
Is there any solution or better way to do like this?
Your help would be appreciated. Thank you.

You Can keep one flag isAddedToCart variable in you bean class which you are using in your adapter(Photo). Now just pass the position in your asynctask once user click on "add to cart" button. On getting the successful you just need to find the bean from the list of bean you passed in adapter and change the flag isAddedToCart to true and notify your adapter thats it. Here is the code snippet:-
Photo Class
public class Photo{
private boolean isAddedToCart;
public void setAddedTOCart(boolean isAdded){
isAddedToCart = isAdded;
}
public boolean isAddedToCart(){
return isAddedToCart;
}
}
AlbumPhotoDetailAdapter onBindViewHolder
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
final Photo photo = mValues.get(position);
/**
* Album Owner Name
*/
String mOwnerName = photo.getOwnerName();
String mOwnerProfilePic = photo.getOwnerImage();
String mDateTime = photo.getDatetime();
String mPrice = String.valueOf(photo.getPrice());
String isAdded = photo.isAddedToCart();
/**
* Price String
*/
String priceStr = String.format(mContext.getString(R.string.string_dollar_price), mPrice);
holder.mAlbumPhotoDetailPhotoPrice.setText(priceStr);
/**
* Main Image
*/
Picasso.with(mContext).load(photo.getLink())
.error(R.drawable.ic_place_holder_circle)
.placeholder(R.drawable.ic_place_holder_circle)
.transform(new ImageTransformation(holder.mAlbumPhotoDetailSubMainImage))
.into(holder.mAlbumPhotoDetailSubMainImage);
/**
* Owner Name and Profile Pic
*/
holder.mAlbumPhotoDetailSubOwnerNameTextView.setText(mOwnerName);
Picasso.with(mContext).load(mOwnerProfilePic)
.error(R.drawable.ic_place_holder_circle)
.placeholder(R.drawable.ic_place_holder_circle)
.resize(100, 100)
.transform(new CircleTransform())
.into(holder.mAlbumPhotoDetailSubOwnerImage);
mDateTime = mDateTime != null ? DateUtils.getNiceTime(mDateTime) : "----";
holder.mAlbumPhotoDetailSubOwnerPostedTimeTextView.setText(mDateTime);
if(isAdded){
holder.mAddToCartButton.setText("Added TO Cart");
}else{
holder.mAddToCartButton.setText("Add TO Cart");
}
// Photo Add to cart.
holder.mAddToCartButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(InternetConnection.checkConnection(mContext)) {
new BackgroundAsyncTask(mContext, (ApiResponse) mContext, mMemberId, photo.getId(),position).execute();
} else {
DailyStudio.noInternetConnectionToast(mContext);
}
}
});
}
your Interface
public interface ApiResponse {
public void apiResponseProcessing(String response,int position);
}
Your Adapter apiResponceProcessing()
#Override
public void apiResponseProcessing(String response,int position) {
Log.i(TAG,"Api Response : "+response);
if(response.equals(Fields.JSON_SUCCESS)) {
mValues.get(position).setAddedTOCart(true);
notifyDataSetChange();
}
}
And finally your
BackgroundAsyncTask
public class BackgroundAsyncTask extends AsyncTask<Void, Void, String> {
private Context context;
private String accessToken;
private int memberId;
private int photoId;
private int mPosition;
private ApiResponse objIBaseApi;
public BackgroundAsyncTask(Context context, ApiResponse apiResponse, int memberId, int photoId,int position) {
this.context = context;
this.memberId = memberId;
this.photoId = photoId;
accessToken = MemberPreference.getAccessToken(context);
this.objIBaseApi = apiResponse;
this.mPosition = position;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(Void... params) {
JSONObject json = JSONParser.addToCartPhoto(accessToken, memberId, photoId);
if(json != null) {
Log.i(TAG,"First Json : "+json.toString());
try {
if (json.getString(Fields.RESULT).equalsIgnoreCase(Fields.JSON_SUCCESS)) {
return Fields.JSON_SUCCESS;
} else if(json.getString(Fields.JSON_ERROR).equalsIgnoreCase(Fields.ERROR_ACCESS_DENIED)) {
String refreshToken = MemberPreference.getRefreshToken(context);
JSONObject newJSONObject = JSONParser.loginMemberWithRefreshToken(refreshToken, Integer.toString(memberId));
if(newJSONObject != null) {
if(newJSONObject.getString(Fields.JSON_ERROR).equalsIgnoreCase(Fields.ERROR_ACCESS_DENIED)) {
return Fields.ERROR_ACCESS_DENIED;
} else {
return Fields.JSON_SUCCESS;
}
} else
return Fields.ERROR_ACCESS_DENIED;
} else {
return Fields.JSON_ERROR;
}
} catch (JSONException e) {
e.printStackTrace();
return Fields.JSON_ERROR;
}
}
return Fields.JSON_ERROR;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
objIBaseApi.apiResponseProcessing(result,mPosition);
}
}

Firstly in my opinion adapter should not care about network request. But
giving an answer in substance, you can try pass anonymous class for your apiResponseProcessing in same manner as you create OnClickListener for your button. It can look like this:
holder.mAddToCartButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(InternetConnection.checkConnection(mContext)) {
new BackgroundAsyncTask(
mContext,
new ApiResponse() {
#Override
public void apiResponseProcessing(String response) {
Log.i(TAG,"Api Response : "+response);
if(response.equals(Fields.JSON_SUCCESS)) {
// Here you can access you holder till it final
}
}
},
mMemberId,
photo.getId()).execute();
} else {
DailyStudio.noInternetConnectionToast(mContext);
}
}
});
But code like this looks messy and spaghetti. As i say at the beginning there are exist at least one different approach to handle changes for buttons inside listview/recivleview. I use method, where adapter only care about building interface with given data and delegate buttons clicks to someone else (in most cases activity that contains listview). An easy way notify activity about button click is Bus messaging pattern. I use Otto event library. When delegate receive notification about button click, it can initiate data changing according current task and then initiate listview reloading or partial update only required rows.
Additional comments
Try to write beautiful code. Constructor AlbumPhotoDetailAdapter has different syntax to assign instance variables. One with this keyword and other without. Usually you should use one way.
public AlbumPhotoDetailAdapter(Activity context, ArrayList<Photo> items) {
this.values = items;
this.context = context;
this.memberId = MemberPreference.getMemberId(context);
}
album instance variable have no access modifiers indication. You should know, that in java programming language omitting access specifiers is not the same as private modifier.

Display Image from clicked item of Recyclerview

I am trying to get the image string from the recyclerview, that is already populated, so that I can display the image on the imageview of another activity. Here, I get the path(url) of image using jsoup:
org.jsoup.nodes.Document document = Jsoup.connect(URL).get();
for(Element e : document.select("img[src]"))
{
Elements imgScr = e.select("img[src]");
String elements = imgScr.attr("src");
String text = imgScr.attr("alt");
String desc = imgScr.attr("title");
arrayList.add(new FeedItem(text, elements, desc));
}
into elements variable and then storing it into arraylist. I want to get that path(url) of image(stored in elements) so that I can display that image in another activity. I tried to retrieve that url from the arrayList using this method:
public String getImageUrl(int pos)
{
return arrayList.get(pos).getThumb();
}
but a IndexOutOfBound exception is thrown, saying that the index(pos) is invalid and size of arrayList is 0. I don't know why it is saying that the list has size 0, while the Recyclerview gets pouplated and shows the data which I parsed using jsoup. Please help me out guys, I am stuck on this for three days.
Okay the complete code is here:
This the main activity which shows the recyclerview
public class RestaurantsAndCafesActivity extends Activity {
public static final String URL = "http://192.168.8.102:80/jay.html";
private RecyclerView mRecyclerView;
private RCRecyclerAdapter adapter;
public String imgUrl;
//public List<FeedItem> feedItemList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.reyclerview_layout);
/* Initialize RecyclerView */
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
//parseResult();
new getDataAsyncTask().execute();
final GestureDetector mGestureDetector = new GestureDetector(RestaurantsAndCafesActivity.this, new GestureDetector.SimpleOnGestureListener() {
#Override public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
mRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
#Override
public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {
View child = recyclerView.findChildViewUnder(motionEvent.getX(),motionEvent.getY());
if(child!=null && mGestureDetector.onTouchEvent(motionEvent)){
Toast.makeText(RestaurantsAndCafesActivity.this,"Clicked Number "+recyclerView.getChildPosition(child), Toast.LENGTH_SHORT).show();
imgUrl = new getDataAsyncTask().getImageUrl(recyclerView.getChildPosition(child));
Intent intent = new Intent(RestaurantsAndCafesActivity.this, GetReviewActivity.class);
intent.putExtra("Imgurl" ,imgUrl);
startActivity(intent);
return true;
}
return false;
}
#Override
public void onTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {
}
});
}
public class getDataAsyncTask extends AsyncTask<Void,Void,Void>{
ArrayList<FeedItem> arrayList = new ArrayList<>();
public String getImageUrl(int pos)
{
return arrayList.get(pos).getThumb();
}
#Override
protected Void doInBackground(Void... params) {
try {
org.jsoup.nodes.Document document = Jsoup.connect(URL).get();
for(Element e : document.select("img[src]"))
{
Elements imgScr = e.select("img[src]");
String elements = imgScr.attr("src");
String text = imgScr.attr("alt");
String desc = imgScr.attr("title");
arrayList.add(new FeedItem(text, elements, desc));
}
}
catch(IOException e)
{
e.printStackTrace();
}
return null;
}
ProgressDialog progressDialog;
#Override
protected void onPreExecute()
{
progressDialog = ProgressDialog.show(RestaurantsAndCafesActivity.this,"Loading","Please Wait",true,false);
}
#Override
protected void onPostExecute(Void aVoid) {
progressDialog.dismiss();
adapter = new RCRecyclerAdapter(getApplicationContext(),arrayList);
mRecyclerView.setAdapter(adapter);
}
}
}
These are the adapter, viewholder and data classes:
public class RCRecyclerAdapter extends RecyclerView.Adapter<RCRecyclerViewListRowHolder> {
private List<FeedItem> feedItemList;
private Context mContext;
public RCRecyclerAdapter(Context context, List<FeedItem> feedItemList) {
this.feedItemList = feedItemList;
this.mContext = context;
}
#Override
public RCRecyclerViewListRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.restaurants_cafes_layout_card, null);
RCRecyclerViewListRowHolder mh = new RCRecyclerViewListRowHolder(v);
return mh;
}
#Override
public void onBindViewHolder(RCRecyclerViewListRowHolder RCRecyclerViewListRowHolder, int i){
FeedItem feedItem = feedItemList.get(i);
Picasso.with(mContext).load(feedItem.getThumb()
).error(R.drawable.placeholder).placeholder(R.drawable.placeholder).into(RCRecyclerViewListRowHolder.thumbnail);
RCRecyclerViewListRowHolder.title.setText(feedItemList.get(i).title);
RCRecyclerViewListRowHolder.desc.setText(feedItemList.get(i).desc);
}
#Override
public int getItemCount() {
return (null != feedItemList ? feedItemList.size() : 0);
}
}
viewholder:
public class RCRecyclerViewListRowHolder extends RecyclerView.ViewHolder {
public ImageView thumbnail;
public TextView title;
public TextView desc;
//Context context;
public RCRecyclerViewListRowHolder(View view) {
super(view);
this.thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
this.title = (TextView) view.findViewById(R.id.title);
this.desc = (TextView) view.findViewById(R.id.desc);
}
}
data:
public class FeedItem {
public String title;
public String thumb;
public String desc;
public FeedItem(String title, String thumb , String desc) {
this.title = title;
this.thumb = thumb;
this.desc = desc;
}
public String getThumb() {
return thumb;
}
}

Here is the culprit:
imgUrl = new getDataAsyncTask().getImageUrl(recyclerView.getChildPosition(child));
You're actually creating a new AsyncTask - if you try to get an element from the arrayList inside that new AsyncTask it's obvious the list is empty, because task populates the list within its doInBackground() method, and it hasn't been executed.
Solution:
In your onCreate method, create your getDataAsyncTask and keep a reference to it in a member variable.
Then, when the task finishes its execution and calls onPostExecute(Void aVoid) set a flag indicating that fact.
Next, in your onClickListener, reference the same task, but execute the code only if the asyncTaskFinished flag is set to true:
public class RestaurantsAndCafesActivity extends Activity {
public static final String URL = "http://192.168.8.102:80/jay.html";
private RecyclerView mRecyclerView;
private RCRecyclerAdapter adapter;
public String imgUrl;
//public List<FeedItem> feedItemList;
private getDataAsyncTask myAsyncTask;
private volatile boolean asyncTaskFinished = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.reyclerview_layout);
/* Initialize RecyclerView */
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
//parseResult();
myAsyncTask = new getDataAsyncTask();
myAsyncTask.execute();
...
mRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
#Override
public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent) {
View child = recyclerView.findChildViewUnder(motionEvent.getX(),motionEvent.getY());
if(child!=null && mGestureDetector.onTouchEvent(motionEvent)){
if(asyncTaskFinished) {
Toast.makeText(RestaurantsAndCafesActivity.this,"Clicked Number "+recyclerView.getChildPosition(child), Toast.LENGTH_SHORT).show();
imgUrl = myAsyncTask.getImageUrl(recyclerView.getChildPosition(child));
Intent intent = new Intent(RestaurantsAndCafesActivity.this, GetReviewActivity.class);
intent.putExtra("Imgurl" ,imgUrl);
startActivity(intent);
return true;
}
return false;
}
}
In AsyncTask:
#Override
protected void onPostExecute(Void aVoid) {
progressDialog.dismiss();
adapter = new RCRecyclerAdapter(getApplicationContext(),arrayList);
mRecyclerView.setAdapter(adapter);
asyncTaskFinished = true;
}
Please note that it is a solution that makes minimal changes in your existing code, however i would suggest a different approach - keeping the list in AsyncTask is kinda ugly, better way is to return it from doInBackground, and within onPostExecute, pass it to adapter (while not keeping a class-scope reference to it in the task), and when you need to access an element fromn the list, just reference the adapter, not your AsyncTask:
imgUrl = adapter.getList().get(recyclerView.getChildPosition(child)).getThumb();

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;
}
}

How do I populate a spinner with a list of objects and not just strings?

Hello I'm new at Android. I want to populate a Spinner with a list of objects. I have googled how to do it but I just find examples with an array of strings.
Can any one help me?
This is my code:
Categories class:
public class Categories
{
#com.google.gson.annotations.SerializedName("id")
private String mId;
#com.google.gson.annotations.SerializedName("name")
private String mName;
public Categories()
{}
public Categories(String id, String name)
{
this.setId(id);
this.setName(name);
}
#Override
public String toString()
{
return mName;
}
// ******** GET *************
public String getId()
{
return mId;
}
public String getName()
{
return mName;
}
// ******** SET *************
public final void setId(String id)
{
mId = id;
}
public final void setName(String name)
{
mName = name;
}
}
This is my Activity code:
public class AgregarActividadActivity extends ActionBarActivity
{
private MobileServiceClient mClient;
private MobileServiceTable<Activities> mActivitiesTable;
private MobileServiceTable<Categories> mCategoriesTable;
private MobileServiceTable<Projects> mProjectsTable;
private EditText mTxtTitulo;
private EditText mTxtDescr;
String categryId = null;
List<Categories> catList = new ArrayList<Categories>();
Spinner spEstado;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_agregar_actividad);
try
{
mClient = new MobileServiceClient(
"https://site.azure-mobile.net/",
"AppKey",
this);
mActivitiesTable = mClient.getTable(Activities.class);
mCategoriesTable = mClient.getTable(Categories.class);
}
catch (MalformedURLException e)
{
createAndShowDialogExc(new Exception("There was an error creating the Mobile Service. Verify the URL"), "Error");
}
mTxtTitulo = (EditText) findViewById(R.id.txtTitulo);
mTxtDescr = (EditText) findViewById(R.id.txtDescripcion);
getCategories();
spEstado = (Spinner)this.findViewById(R.id.spEstado);
ArrayAdapter<Categories> Adapter = new ArrayAdapter<Categories>(this,
android.R.layout.simple_spinner_item, catList);
Adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spEstado.setAdapter(Adapter);
spEstado.setOnItemSelectedListener(
new AdapterView.OnItemSelectedListener() {
public void onItemSelected(
AdapterView<?> parent,
View view,
int position,
long id) {
Categories item = (Categories) parent.getItemAtPosition(position);
}
public void onNothingSelected(AdapterView<?> parent) {
}
}
);
spProjects = (Spinner)this.findViewById(R.id.spProyecto);
ArrayAdapter<Projects> proAdapter = new ArrayAdapter<Projects>(this,
android.R.layout.simple_spinner_item, proList);
proAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spProjects.setAdapter(proAdapter);
}
private void getCategories()
{
mCategoriesTable.execute(new TableQueryCallback<Categories>()
{
public void onCompleted(List<Categories> result, int count, Exception exception, ServiceFilterResponse response)
{
if (exception == null)
{
for (Categories item : result)
{
catList.add(item);
}
}
else
{
createAndShowDialog(exception, "Error");
}
}
});
}
}
I get the dropdownlist with the objects, but when I select one item, it is not displayed as the selected item, when the dropdownlist is hidden.
Any idea will help me! Thank you!!

You need to write a CustomAdapter for this. It is similar to writing a CustomAdapter for a ListView. You can look at Custom Adapter for List View for an idea

SearchView CSV ArrayList

I just started to program for Android.
I'm building this app for my internship but I'm stock with the search function.
I have a CVS file were I set the value in a ArrayList, for this I build a CSV adapter and call this adapter in my Fragment. Now everything works fine I get my list with all the values I want, the problem is the list consist of 1000 records. This is why I want to implement a searchview so that the user can search for the desire value.
Now I want when the user choose the search and starts typing the Arrylist is searched and starts to filter the possible options in the list. This way when the desire value is shown the user can select this one.
I've been trying to do this 3 days already, I know I have to do something in the onQueryTextChange and onQueryTextsubmit. But so far no luck :(
Can someone help me solve this please I would really appreciate it. Tnx in advance.
public class CSVAdapter extends ArrayAdapter<airports> {
Context ctx;
public CSVAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
//Store a reference to the Context so we can use it to load a file from Assets.
this.ctx = context;
//Load the data.
loadArrayFromFile();
}
#Override
public View getView(final int pos, View convertView, final ViewGroup parent){
RelativeLayout row = (RelativeLayout)convertView;
if(null == row){
//No recycled View, we have to inflate one.
LayoutInflater inflater = (LayoutInflater)parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = (RelativeLayout)inflater.inflate(R.layout.departure_point_fragment, null);
}
TextView anameTxt = (TextView)row.findViewById(R.id.airport_name);
TextView acityTxt = (TextView)row.findViewById(R.id.airport_city);
TextView acountryTxt = (TextView)row.findViewById(R.id.airport_country);
TextView icaoTxt = (TextView)row.findViewById(R.id.airport_code);
anameTxt.setText(getItem(pos).getAname());
acityTxt.setText(getItem(pos).getAcity());
acountryTxt.setText(getItem(pos).getAcountry());
icaoTxt.setText(getItem(pos).getIcao());
return row;
}
private void loadArrayFromFile(){
try {
// Get input stream and Buffered Reader for our data file.
InputStream is = ctx.getAssets().open("airports.csv");
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String line;
//Read each line
while ((line = reader.readLine()) != null) {
//Split to separate the name from the capital
String[] RowData = line.split(",");
//Create a State object for this row's data.
airports cur = new airports();
cur.setAname(RowData[0]);
cur.setAcity(RowData[1]);
cur.setAcountry(RowData[2]);
cur.setIcao(RowData[3]);
cur.setLat(RowData[4]);
cur.setLon(RowData[5]);
cur.setAltitude(RowData[6]);
cur.setTimezone(RowData[7]);
cur.setDst(RowData[8]);
//Add the State object to the ArrayList (in this case we are the ArrayList).
this.add(cur);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
public class airports {
private String aname;
private String acity;
private String acountry;
private String icao;
private String lat;
private String lon;
private String altitude;
private String timezone;
private String dst;
public String getAname() {
return aname;
}
public void setAname(String aname) {
this.aname = aname;
}
public String getAcity() {
return acity;
}
public void setAcity(String acity) {
this.acity = acity;
}
public String getAcountry() {
return acountry;
}
public void setAcountry(String acountry) {
this.acountry = acountry;
}
public String getIcao() {
return icao;
}
public void setIcao(String icao) {
this.icao = icao;
}
public String getLat() {
return lat;
}
public void setLat(String lat) {
this.lat = lat;
}
public String getLon() {
return lon;
}
public void setLon(String lon) {
this.lon = lon;
}
public String getAltitude() {
return altitude;
}
public void setAltitude(String altitude) {
this.altitude = altitude;
}
public String getTimezone() {
return timezone;
}
public void setTimezone(String timezone) {
this.timezone = timezone;
}
public String getDst() {
return dst;
}
public void setDst(String dst) {
this.dst = dst;
}
}
public class departurePointFragment extends SherlockListFragment implements SearchView.OnQueryTextListener{
private CSVAdapter mAdapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.listview, container, false);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState); getSherlockActivity().getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSherlockActivity().getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
setHasOptionsMenu(true);
mAdapter =new CSVAdapter(getActivity(), -1);
setListAdapter(mAdapter);
getListView();
setRetainInstance(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.searching, menu);
MenuItem item = menu.findItem(R.id.menu_search);
SearchView itemview = (SearchView) item.getActionView();
// Execute this when searching
itemview.setOnQueryTextListener(this);
super.onCreateOptionsMenu(menu, inflater);
Log.d("Nicola", "2");
}
#Override
public boolean onQueryTextSubmit(String query) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean onQueryTextChange(String query) {
Log.d("Nicola", "100");
return true;
}
}

Took a while to figure this out, but here it goes :)
Add this to your adapter:
ArrayList<airports> airportsArray = new ArrayList<airports>();
public ArrayList<airports> getAirportsArray()
{
return airportsArray;
}
(you can rightclick on the ArrayList declaration, the choose Source->Generate Getters and Setters)
After reading the CSV file you can add these objects to the newly created ArrayList, changing:
this.add(cur);
to
this.add(cur);
airportsArray.add(cur);
Then in your fragment, in the onQueryTextChange method, do the following:
this.mAdapter.clear(); // This clears the existing list
// Loop through the airports
for (airports item : mAdapter.getAirportsArray())
{
// Does the name contains what you are searching for?
// You can add more criteria here using the || (OR) operator
if (item.getAname().contains(query))
{
// If so, add it
mAdapter.add(item);
}
}
mAdapter.notifyDataSetChanged(); // Notify the adapter that the dataset changed
return true;
Hope that helps, good luck!

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Android delete item from Listview Imlemented Using Baseadapter - android

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Display Image from clicked item of Recyclerview

How to show Images in Gridview using pulltorefresh class

How do I populate a spinner with a list of objects and not just strings?

SearchView CSV ArrayList

Categories

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