Android - Firebase Realtime database not working for this library

Android - Firebase Realtime database not working for this library - android

I have been using firebase for my app, all works fine, however, I recently updated my UI, by adding this library, the other data in my listview but this library's view does not update, can someone please help me with this, and there's one more issue with my code, when I update the status, i.e the library's view, only the selected items view should be updated, instead all the views in my list get updated, say if I select "Received" for one item in the list, all others get updated to "Received", this does not reflect in the firebase console, and when I re open the app, everything will fixed. Please assist me with this. Here' my git repository link if needed.
AddOrUpdateItem.java
package com.fayaz.uniabex;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Spinner;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class AddOrUpdateItem extends AppCompatActivity implements OnItemSelectedListener {
Button bOK,bCancel;
Item item;
int position;
EditText iName,iPono,iQty,iSupplier,iContact,iTranport,iLrno,iRemarks;
CoordinatorLayout cl;
public Spinner spinner;
String status, selectedStatus;
public ArrayAdapter<String> dataAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_or_update_item);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
position = getIntent().getIntExtra("Position", -1);
cl = (CoordinatorLayout) findViewById(R.id.cdlayout);
final Intent intent = new Intent(AddOrUpdateItem.this, MainActivity.class);
iName= (EditText) findViewById(R.id.iName);
iPono = (EditText) findViewById(R.id.iPoNo);
iQty = (EditText) findViewById(R.id.iQty);
iSupplier = (EditText) findViewById(R.id.iSupplier);
iContact = (EditText) findViewById(R.id.iContact);
iTranport = (EditText) findViewById(R.id.iTransport);
iLrno = (EditText) findViewById(R.id.iLrno);
iRemarks = (EditText) findViewById(R.id.iRemarks);
// Spinner element
spinner = (Spinner) findViewById(R.id.status);
// Spinner click listener
spinner.setOnItemSelectedListener(this);
// Spinner Drop down elements
List<String> categories = new ArrayList<String>();
categories.add("Enquiry");
categories.add("Quotation");
categories.add("Po Rel");
categories.add("Dispatched");
categories.add("Received");
// Creating adapter for spinner
dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, categories);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
spinner.setAdapter(dataAdapter);
bOK = (Button) findViewById(R.id.bOk);
bCancel = (Button) findViewById(R.id.bCancel);
if(position != -1) {
getSupportActionBar().setTitle("Edit Entry");
searchPerson(position);
item = new Item();
}
else {
getSupportActionBar().setTitle("Add Entry");
item = null;
}
bOK.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String test = iRemarks.getText().toString();
Item i = new Item();
i.setItem(iName.getText().toString());
i.setPonum(iPono.getText().toString());
i.setQty(iQty.getText().toString());
i.setSupplier(iSupplier.getText().toString());
i.setContact(iContact.getText().toString());
i.setTransporter(iTranport.getText().toString());
i.setLrnum(iQty.getText().toString());
i.setStatus(selectedStatus);
if(test.equals("\n")){
i.setRemarks(iRemarks.getText().toString());
}
else{
i.setRemarks(iRemarks.getText().toString() + "\n");
}
if (item == null)
MainActivity.getInstance().addItem(i);
else
MainActivity.getInstance().updateItemDetails(i, position);
finish();
}
});
bCancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
}
public void searchPerson(int position) {
String clickedKey = MainActivity.getInstance().getKeysArray().get(position);
MainActivity.getInstance().getmDatabase().child(clickedKey).addListenerForSingleValueEvent(
new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
// Get user value
String test = iRemarks.getText().toString();
Item person = dataSnapshot.getValue(Item.class);
iName.setText(person.getItem());
iPono.setText(person.getPonum());
iSupplier.setText(person.getSupplier());
iQty.setText(person.getQty());
iTranport.setText(person.getTransporter());
iContact.setText(person.getContact());
iLrno.setText(person.getLrnum());
spinner.setSelection(dataAdapter.getPosition(person.getStatus()));
if(test.equals("\n")){
iRemarks.setText(person.getRemarks());
}
else{
iRemarks.setText(person.getRemarks() + "\n");
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// handle arrow click here
if (item.getItemId() == android.R.id.home) {
finish(); // close this activity and return to preview activity (if there is any)
}
return super.onOptionsItemSelected(item);
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
status = parent.getItemAtPosition(position).toString();
selectedStatus = Integer.toString(position);
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
ItemDetailsAdapter.java
package com.fayaz.uniabex;
/**
* Created by Fayaz on 21/12/2016.
*/
import android.widget.BaseAdapter;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import com.anton46.stepsview.StepsView;
import java.util.ArrayList;
public class ItemDetailsAdapter extends BaseAdapter {
private ArrayList<Item> arrayListItem;
private Context context;
private LayoutInflater inflater;
public String curStatus;
public ItemDetailsAdapter(Context context, ArrayList<Item> arrayListItem) {
this.context = context;
this.arrayListItem = arrayListItem;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return arrayListItem.size();
}
#Override
public Object getItem(int position) {
return arrayListItem.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final String[] labels = {"Enq", "Qtn", "PO", "Dspd", "Rcvd"};
View v = convertView;
Holder holder;
if (v == null) {
v = inflater.inflate(R.layout.list_item, null);
holder = new Holder();
holder.ItemName = (TextView) v.findViewById(R.id.ItemNametv);
holder.qty = (TextView) v.findViewById(R.id.qtytv);
holder.EditItem = (Button) v.findViewById(R.id.EditItem);
holder.DeleteItem = (Button) v.findViewById(R.id.DeleteItem);
holder.mStepsView = (StepsView) v.findViewById(R.id.stepsView);
curStatus = arrayListItem.get(position).getStatus();
int n = Integer.parseInt(curStatus);
holder.mStepsView.setLabels(labels)
.setBarColorIndicator(context.getResources().getColor(R.color.material_blue_grey_800))
.setProgressColorIndicator(context.getResources().getColor(R.color.colorPrimary))
.setLabelColorIndicator(context.getResources().getColor(R.color.colorPrimaryDark))
.setCompletedPosition(n)
.drawView();
v.setTag(holder);
} else {
holder = (Holder) v.getTag();
}
holder.ItemName.setText("Item: " + arrayListItem.get(position).getItem());
holder.qty.setText("Qty: " + arrayListItem.get(position).getQty());
holder.EditItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context,AddOrUpdateItem.class).setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra("Position", position);
context.getApplicationContext().startActivity(intent);
}
});
holder.DeleteItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ShowConfirmDialog(context, position);
}
});
return v;
}
class Holder {
TextView ItemName,qty;
Button DeleteItem, EditItem;
StepsView mStepsView;
}
public static void ShowConfirmDialog(Context context, final int position) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
alertDialogBuilder
.setMessage("Are you sure you want to delete this entry?")
.setCancelable(true)
.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
MainActivity.getInstance().deleteItem(position);
}
})
.setNegativeButton("NO", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
}

Related

Why my listview not refresh when I press back button and come back to activity?

I'm tired already with my code. I'm writing chat application. My app consist of two activity. First activity has a listview of wich each row contain a last message which was send for the user while a second activity contain the whole conversation. In my app I used socket.io for android. My app works fine. Listview is refresh when a data is receive but when I press back button and then come back to the activity a listview not refresh itself already. In logs console I see that a data has received and "changed" method is called but listview is not refresh. What is wrong in belows code?
package com.example.seadog.fb_dialog;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.net.URISyntaxException;
import java.util.ArrayList;
import io.socket.client.IO;
import io.socket.client.Socket;
import io.socket.emitter.Emitter;
public class MainActivity extends Activity {
public static ArrayList arrayList = new ArrayList();
public ListView listView;
public MyBaseAdapter adapter;
public TextView textView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/*
* Get Socket.io Object
*/
SocketIO socketIo = new SocketIO();
Socket mSocket = socketIo.getSocket(); // get socket
Integer id = socketIo.getId(); // get Website ID
if(mSocket == null) {
socketIo.Connection();
mSocket = socketIo.getSocket();
mSocket.on("message", new Emitter.Listener() {
/*
* Message Listener
*/
#Override
public void call(Object... args) {
Boolean isset = false;
try {
JSONObject object = (JSONObject) args[0];
String _id = object.getString("_id");
String message = object.getString("message");
JSONObject obj = new JSONObject();
obj.put("direction", "fb-lt");
obj.put("message", message);
obj.put("date", "2017-05-29T12:15:49.245Z");
for(int i = 0; i < arrayList.size(); i++){
ListData ld = (ListData) arrayList.get(i);
String id = ld.getId();
if(_id.equals(id)){
JSONArray Data = ld.getData();
Data.put(obj);
ld.setDescription(message);
arrayList.set(i, ld);
isset = true;
Log.d("LOG", message);
}
}
if(!isset) {
JSONArray jsonArray = new JSONArray();
jsonArray.put(obj);
ListData ld = new ListData();
ld.set_id(_id);
ld.setID(1);
ld.setTitle("Klient:");
ld.setDescription(message);
ld.setData(jsonArray);
arrayList.add(ld);
}
} catch (JSONException e) {
e.printStackTrace();
}
changed();
}
});
}
/*
* Populate a listview
*/
listView = (ListView) findViewById(R.id.listView);
adapter = new MyBaseAdapter(this, arrayList);
listView.setAdapter(adapter);
/*
* OnItemClickListener
*/
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(MainActivity.this, Conversation.class);
intent.putExtra("item", position);
startActivity(intent);
TextView textView = (TextView) view.findViewById(R.id.descitem);
textView.setTypeface(null, Typeface.NORMAL);
}
});
textView = (TextView) findViewById(R.id.count);
}
private void changed() {
runOnUiThread(new Runnable() {
#Override
public void run() {
adapter.notifyDataSetChanged();
Log.d("LOG:", "adapter refresh");
}
});
}
}
MyBaseAdapter Class:
package com.example.seadog.fb_dialog;
import android.content.Context;
import android.graphics.Typeface;
import android.util.Log;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class MyBaseAdapter extends BaseAdapter {
Context context;
ArrayList<ListData> items = new ArrayList();
LayoutInflater inflater;
int id = 0;
public MyBaseAdapter(Context context, ArrayList items) {
this.context = context;
this.items = items;
inflater = LayoutInflater.from(this.context);
}
#Override
public int getCount() {
return items.size();
}
#Override
public ListData getItem(int position) {
return items.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
MyViewHolder mViewHolder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_item, parent, false);
mViewHolder = new MyViewHolder(convertView);
convertView.setTag(mViewHolder);
} else {
mViewHolder = (MyViewHolder) convertView.getTag();
}
ListData currentListData = getItem(position);
id = position > 0 ? getItem(position - 1).getID() : 0;
mViewHolder.Title.setText(currentListData.getTitle());
mViewHolder.Desc.setText(currentListData.getDescription());
if(1==1){
mViewHolder.Title.setVisibility(View.GONE);
}else {
if (id != currentListData.getID()) {
mViewHolder.Title.setVisibility(View.VISIBLE);
} else {
mViewHolder.Title.setVisibility(View.GONE);
}
}
return convertView;
}
private class MyViewHolder {
TextView Title, Desc;
public MyViewHolder(View item) {
Title = (TextView) item.findViewById(R.id.txtitem);
Desc = (TextView) item.findViewById(R.id.descitem);
Typeface title = Typeface.createFromAsset(context.getAssets(), "fonts/DroidSans.ttf");
Title.setTypeface(title);
Typeface desc = Typeface.createFromAsset(context.getAssets(), "fonts/DroidSans.ttf");
Desc.setTypeface(desc, Typeface.BOLD);
}
}
}

#Override
protected void onRestart() {
Intent intentBack = new Intent(getApplicationContext(),MainActivity.class);
startActivity(intentBack);
super.onRestart();
}

you did not have any callback after you back to this activity .
You can either override onResume() method or startActivityForResult and do something in the onAcitvityForResult method.

In BaseAdapter setVisibility(View.GONE); is not hiding the view but space is released

In my BaseAdpater I'm setting the visibility of a view to GONE in a row after some operation. All operation is fine but view remains visible in background while lower views are move up until i touch the screen. It means listview is updating the views and releasing the space on setting visibility to GONE but view is still visible in background. What could be the issue?
Code:
import android.content.Context;
import android.content.DialogInterface;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.iu.foodbucket.BaseActivity;
import com.iu.foodbucket.R;
import com.iu.foodbucket.database.MyDataSource;
import com.iu.foodbucket.fragments.CartFragment;
import com.iu.foodbucket.models.Cart;
import com.iu.foodbucket.utils.AppGlobal;
import java.util.List;
public class CartAdapter extends BaseAdapter {
Fragment context;
List<Cart> data;
MyDataSource myDataSource;
boolean isOldOrder;
public CartAdapter(Fragment ctx, List<Cart> data, boolean orderStatus) {
this.context = ctx;
this.data = data;
this.isOldOrder = orderStatus;
myDataSource = new MyDataSource(ctx.getActivity());
}
#Override
public int getCount() {
return data.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
LayoutInflater inflater = (LayoutInflater) context.getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.row_cart, parent, false);
holder.title_tv = (TextView) convertView.findViewById(R.id.title_tv);
holder.quantity_tv = (TextView) convertView.findViewById(R.id.quantity_tv);
holder.price_tv = (TextView) convertView.findViewById(R.id.price_tv);
holder.edit_iv = (ImageView) convertView.findViewById(R.id.edit_iv);
holder.thumbnail_iv = (ImageView) convertView.findViewById(R.id.thumbnail_iv);
holder.editPanel = (LinearLayout) convertView.findViewById(R.id.editPanel);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.title_tv.setText(data.get(position).getMenu().getTitle());
holder.quantity_tv.setText(context.getString(R.string.quantity_abbr) + " " + data.get(position).getQuantity());
if (((BaseActivity) context.getActivity()).dataPreference.getIsImageEnabled())
Glide.with(context.getActivity()).load(data.get(position).getMenu().getThumbnail()).placeholder(R.drawable.ic_tag_face).centerCrop().into(holder.thumbnail_iv);
float price = Float.parseFloat(data.get(position).getMenu().getPrice());
price = (float) AppGlobal.round(price, 2);
holder.price_tv.setText(data.get(position).getMenu().getPriceUnit() + " " + price);
final View finalConvertView = convertView;
holder.edit_iv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (holder.editPanel.getVisibility() != View.VISIBLE) {
holder.editPanel.setVisibility(View.VISIBLE);
showEditablePanel(finalConvertView, position, holder.editPanel);
} else {
holder.editPanel.setVisibility(View.GONE);
}
}
});
return convertView;
}
private void showEditablePanel(View v, final int position, final LinearLayout editPanel) {
final TextView quantity_tv = (TextView) v.findViewById(R.id.quantityUpdated_tv);
final ImageButton minus_btn = (ImageButton) v.findViewById(R.id.minus_btn);
final ImageButton plus_btn = (ImageButton) v.findViewById(R.id.plus_btn);
ImageButton update_btn = (ImageButton) v.findViewById(R.id.update_btn);
ImageButton remove_btn = (ImageButton) v.findViewById(R.id.remove_btn);
final int[] quantity = {Integer.parseInt(data.get(position).getQuantity())};
quantity_tv.setText(quantity[0] + "");
minus_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
quantity[0]--;
updateViews(quantity[0], minus_btn, quantity_tv);
}
});
plus_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
quantity[0]++;
updateViews(quantity[0], minus_btn, quantity_tv);
}
});
update_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (!isOldOrder) // update cart item in DB
myDataSource.updateCartItem(data.get(position).getMenu().getId(), quantity[0] + "");
data.get(position).setQuantity(quantity[0] + "");
editPanel.setVisibility(View.GONE);
notifyDataSetChanged();
((CartFragment) context).updateTotalValues();
}
});
remove_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
deletionConfirmationDialog(position, editPanel);
}
});
}
public void deletionConfirmationDialog(final int position, final LinearLayout editPanel) {
final android.app.AlertDialog.Builder alertDialogBuilder = new android.app.AlertDialog.Builder(context.getActivity());
alertDialogBuilder.setCancelable(false);
alertDialogBuilder.setTitle(context.getString(R.string.title_delete));
alertDialogBuilder.setMessage(context.getString(R.string.message_confirm_deletion));
alertDialogBuilder.setPositiveButton(context.getString(R.string.title_yes), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
if (!isOldOrder) // delete cart item from DB
myDataSource.deleteCartItem(data.get(position).getMenu().getId());
editPanel.setVisibility(View.GONE);
data.remove(position);
notifyDataSetChanged();
((CartFragment) context).updateTotalValues();
}
});
alertDialogBuilder.setNegativeButton(context.getString(R.string.title_no), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, just close
}
});
android.app.AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
private void updateViews(int quantity, ImageButton minus_btn, TextView quantity_tv) {
if (quantity > 1) {
minus_btn.setEnabled(true);
minus_btn.setAlpha((float) 1.0);
} else {
minus_btn.setEnabled(false);
minus_btn.setAlpha((float) 0.4);
}
quantity_tv.setText(quantity + "");
}
private class ViewHolder {
TextView title_tv, quantity_tv, price_tv;
ImageView thumbnail_iv, edit_iv;
LinearLayout editPanel;
}
}

if you mean after setting visiblity gone of a row, that row remains blank and that gap is visible,the better way is to filter the adapter content by using getFilter() to display by excluding that row content and notifyadapter changed.

Cannot remove item from Shopping Cart android studio

I referred [this][1] and [this][2] site and tried to modify it according to my own needs. Problem is I can't remove an item from the cart. I have tried everything including searching for solutions in stackoverflow and google but no luck.
Here is my CatalogActivity.java
package com.comlu.sush.shoppingcart;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
import java.util.List;
public class CatalogActivity extends AppCompatActivity {
private List<Product> mProductList;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_catalog);
// Obtain a reference to the product catalog
mProductList = ShoppingCartHelper.getCatalog(getResources());
// Create the list
ListView listViewCatalog = (ListView) findViewById(R.id.ListViewCatalog);
listViewCatalog.setAdapter(new ProductAdapter(mProductList, getLayoutInflater(), false,false));
listViewCatalog.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Intent productDetailsIntent = new Intent(getBaseContext(),ProductDetailsActivity.class);
productDetailsIntent.putExtra(ShoppingCartHelper.PRODUCT_INDEX, position);
startActivity(productDetailsIntent);
}
});
Button viewShoppingCart = (Button) findViewById(R.id.ButtonViewCart);
viewShoppingCart.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent viewShoppingCartIntent = new Intent(getBaseContext(), ShoppingCartActivity.class);
startActivity(viewShoppingCartIntent);
}
});
}
}
ShoppingCartHelper.java
package com.comlu.sush.shoppingcart;
import android.content.res.Resources;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Vector;
public class ShoppingCartHelper {
public static final String PRODUCT_INDEX = "PRODUCT_INDEX";
private static List<Product> catalog;
private static Map<Product, ShoppingCartEntry> cartMap = new HashMap<Product, ShoppingCartEntry>();
public static List<Product> getCatalog(Resources res){
if(catalog == null) {
catalog = new Vector<Product>();
catalog.add(new Product("Dead or Alive", res
.getDrawable(R.drawable.first),
"Dead or Alive by Tom Clancy with Grant Blackwood", 29.99));
catalog.add(new Product("Switch", res
.getDrawable(R.drawable.second),
"Switch by Chip Heath and Dan Heath", 24.99));
catalog.add(new Product("Watchmen", res
.getDrawable(R.drawable.third),
"Watchmen by Alan Moore and Dave Gibbons", 14.99));
}
return catalog;
}
public static void setQuantity(Product product, int quantity) {
// Get the current cart entry
ShoppingCartEntry curEntry = cartMap.get(product);
// If the quantity is zero or less, remove the products
if(quantity <= 0) {
if(curEntry != null)
removeProduct(product);
return;
}
// If a current cart entry doesn't exist, create one
if(curEntry == null) {
curEntry = new ShoppingCartEntry(product, quantity);
cartMap.put(product, curEntry);
return;
}
// Update the quantity
curEntry.setQuantity(quantity);
}
public static int getProductQuantity(Product product) {
// Get the current cart entry
ShoppingCartEntry curEntry = cartMap.get(product);
if(curEntry != null)
return curEntry.getQuantity();
return 0;
}
public static void removeProduct(Product product) {
cartMap.remove(product);
}
public static List<Product> getCartList() {
List<Product> cartList = new Vector<Product>(cartMap.keySet().size());
for(Product p : cartMap.keySet()) {
cartList.add(p);
}
return cartList;
}
}
ShoppingCartActiity.java
package com.comlu.sush.shoppingcart;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import java.util.List;
public class ShoppingCartActivity extends AppCompatActivity {
private List<Product> mCartList;
private ProductAdapter mProductAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shopping_cart);
mCartList = ShoppingCartHelper.getCartList();
// Make sure to clear the selections
for(int i=0; i<mCartList.size(); i++) {
mCartList.get(i).selected = false;
}
// Create the list
final ListView listViewCatalog = (ListView) findViewById(R.id.ListViewCatalog);
mProductAdapter = new ProductAdapter(mCartList, getLayoutInflater(), true,true);
listViewCatalog.setAdapter(mProductAdapter);
listViewCatalog.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
mProductAdapter.toggleSelection(position);
}
});
removeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mProductAdapter.removeSelected();
}
});
}
#Override
protected void onResume() {
super.onResume();
// Refresh the data
if(mProductAdapter != null) {
mProductAdapter.notifyDataSetChanged();
}
}
}
ProductDetailsActivity.java
package com.comlu.sush.shoppingcart;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
public class ProductDetailsActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_product_details);
final int result=0;
List<Product> catalog = ShoppingCartHelper.getCatalog(getResources());
int productIndex = getIntent().getExtras().getInt(
ShoppingCartHelper.PRODUCT_INDEX);
final Product selectedProduct = catalog.get(productIndex);
// Set the proper image and text
ImageView productImageView = (ImageView) findViewById(R.id.ImageViewProduct);
productImageView.setImageDrawable(selectedProduct.productImage);
TextView productTitleTextView = (TextView) findViewById(R.id.TextViewProductTitle);
productTitleTextView.setText(selectedProduct.title);
TextView productDetailsTextView = (TextView) findViewById(R.id.TextViewProductDetails);
productDetailsTextView.setText(selectedProduct.description);
// Update the current quantity in the cart
TextView textViewCurrentQuantity = (TextView) findViewById(R.id.textViewCurrentlyInCart);
textViewCurrentQuantity.setText("Currently in Cart: "
+ ShoppingCartHelper.getProductQuantity(selectedProduct));
// Save a reference to the quantity edit text
final EditText editTextQuantity = (EditText) findViewById(R.id.editTextQuantity);
Button addToCartButton = (Button) findViewById(R.id.ButtonAddToCart);
addToCartButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Check to see that a valid quantity was entered
int quantity = 0;
try {
quantity = Integer.parseInt(editTextQuantity.getText()
.toString());
if (quantity < 0) {
Toast.makeText(getBaseContext(),
"Please enter a quantity of 0 or higher",
Toast.LENGTH_SHORT).show();
return;
}
} catch (Exception e) {
Toast.makeText(getBaseContext(),
"Please enter a numeric quantity",
Toast.LENGTH_SHORT).show();
return;
}
// If we make it here, a valid quantity was entered
ShoppingCartHelper.setQuantity(selectedProduct, quantity);
// Close the activity
finish();
}
});
}
}
ProductAdapter.java
package com.comlu.sush.shoppingcart;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;
public class ProductAdapter extends BaseAdapter {
private List<Product> mProductList;
private LayoutInflater mInflater;
private boolean mShowQuantity;
private boolean mShowCheckbox;
public ProductAdapter(List<Product> list, LayoutInflater inflater, boolean showQuantity, boolean showCheckbox) {
mProductList = list;
mInflater = inflater;
mShowQuantity = showQuantity;
mShowCheckbox = showCheckbox;
}
#Override
public int getCount() {
return mProductList.size();
}
#Override
public Object getItem(int position) {
return mProductList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewItem item;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item, null);
item = new ViewItem();
item.productImageView = (ImageView) convertView
.findViewById(R.id.ImageViewItem);
item.productTitle = (TextView) convertView
.findViewById(R.id.TextViewItem);
item.productQuantity = (TextView) convertView
.findViewById(R.id.textViewQuantity);
item.productCheckbox = (CheckBox) convertView.findViewById(R.id.CheckBoxSelected);
convertView.setTag(item);
} else {
item = (ViewItem) convertView.getTag();
}
Product curProduct = mProductList.get(position);
item.productImageView.setImageDrawable(curProduct.productImage);
item.productTitle.setText(curProduct.title);
if(!mShowCheckbox) {
item.productCheckbox.setVisibility(View.GONE);
} else {
if(curProduct.selected == true)
item.productCheckbox.setChecked(true);
else
item.productCheckbox.setChecked(false);
}
// Show the quantity in the cart or not
if (mShowQuantity) {
item.productQuantity.setText("Quantity: "
+ ShoppingCartHelper.getProductQuantity(curProduct));
} else {
// Hid the view
item.productQuantity.setVisibility(View.GONE);
}
return convertView;
}
public void toggleSelection(int position) {
Product selectedProduct = (Product) getItem(position);
if(selectedProduct.selected) { // no need to check " == true"
selectedProduct.selected = false;
}
else {
selectedProduct.selected = true;
}
notifyDataSetInvalidated();
}
public void removeSelected() {
for(int i=mProductList.size()-1; i>=0; i--) {
if(mProductList.get(i).selected) {
mProductList.remove(i);
}
}
notifyDataSetChanged();
}
private class ViewItem {
ImageView productImageView;
TextView productTitle;
TextView productQuantity;
CheckBox productCheckbox;
}
}

You should move data manipulation to the adapter, and design-wise it would make sense and might also fix the problem you're telling us.
Write this method in your ProductAdapter:
public void removeSelected() {
for(int i = mProductList.size()-1; i >= 0; i--) {
if(mProductList.get(i).selected) {
mProductList.remove(i);
}
}
notifyDataSetChanged();
}
Update your OnClickListener (in your ShoppingCartActiity of course):
removeButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
mProductAdapter.removeSelected();
}
});
Edit
I noticed that you aren't applying OOP's concept of encapsulation here. That is, ShoppingCartActiity shouldn't be making changes to the data which belongs to your adapter.
So, just create public methods inside the ProductAdapter for item for selection, etc and call them from ShoppingCartActiity as needed.
Copy this method in your ProductAdapter:
public void toggleSelection(int position) {
Product selectedProduct = (Product) getItem(position);
if(selectedProduct.selected) { // no need to check " == true"
selectedProduct.selected = false;
}
else {
selectedProduct.selected = true;
}
notifyDataSetInvalidated();
}
mProductAdapter.toggleSelection(position); will replace following code ShoppingCartActiity:
Product selectedProduct = mCartList.get(position);
if(selectedProduct.selected == true)
selectedProduct.selected = false;
else
selectedProduct.selected = true;
mProductAdapter.notifyDataSetInvalidated();
Edit2
The problem is that the ShoppingCartActiity takes items from ShoppingCartEntry on starting up, but it never writes back the changes to it when you remove items.
update your removeButton's onClick() to:
mProductAdapter.removeSelected();
if (product.selected) {
// set products which are remaining in the adapter
ShoppingCartHelper.setProducts(mProductAdapter.getProducts());
}
ShoppingCartHelper.setProducts() would replace the old data with the passed one:
public static void setProducts(ArrayList<Product> products) {
catalog = new Vector<Product>();
for (Product product : products) {
catalog.add(product);
}
}
mProductAdapter.getProducts() will just return the list of Products, like:
public List<Product> getProducts() {
return mProductList;
}

you just have to remove selected item from list, and after adapter.notifiyDataSetChanged() it will refresh the adapter.
removeButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Loop through and remove all the products that are selected
// Loop backwards so that the remove works correctly
for(int i=mCartList.size()-1; i>=0; i--) {
if(mCartList.get(i).selected) {
mCartList.remove(i);
//mProductAdapter.removeSelected();
}
}
if(mProductAdapter!=null)
mProductAdapter.notifyDataSetChanged();
}
});

check one box multiple boxes are checked

I am using custom listViewAdapter class and I want to check one box in a single row, but it is checking multiple checks in multiple rows which is not my requirement. Please tell me how can I resolve it.
CourseActivity.java
package com.technerdshub.vusocial.Activities;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.AdapterView;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.SaveCallback;
import com.technerdshub.vusocial.DBHelper;
import com.technerdshub.vusocial.Models.Course;
import com.technerdshub.vusocial.Models.StudyProgramModel;
import com.technerdshub.vusocial.Models.User;
import com.technerdshub.vusocial.R;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
public class CourseActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {
ListView list;
EditText editsearch;
ArrayList arrayList = new ArrayList();
CourseViewAdapter adapter;
Course courseObject;
boolean isChecked;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.course_activity);
List<Course> courseList;
DBHelper db = new DBHelper(this);
courseList = db.getAllCourses();
list = (ListView) findViewById(R.id.listview1);
for (Course c : courseList) {
arrayList.add(c);
}
adapter = new CourseViewAdapter(this, arrayList);
adapter.courseActivity = this;
list.setAdapter(adapter);
editsearch = (EditText) findViewById(R.id.searchF);
editsearch.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
String text = editsearch.getText().toString().toLowerCase(Locale.getDefault());
adapter.filter(text);
}
#Override
public void afterTextChanged(Editable s) {
}
});
User user = User.getInstance();
saveUserOnParse(user);
}
private void saveUserOnParse(User user) {
ParseObject parseUser = new ParseObject("UserData");
parseUser.put("name", user.getName());
parseUser.put("vuId", user.getVuId());
parseUser.put("studyProgram", user.getStudyProgram());
parseUser.put("facebookId", user.getFacebookId());
parseUser.put("facebookEmail", user.getFacebookEmail());
parseUser.saveInBackground(new SaveCallback() {
#Override
public void done(ParseException e) {
if (e == null) {
// Intent i = new Intent(getContext(), StudentDashboardActivity.class);
//// i.putExtra("E-mail", "abc");
// startActivity(i);
} else {
Toast temp = Toast.makeText(CourseActivity.this, "Data is not saved.", Toast.LENGTH_SHORT);
temp.show();
}
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// check if the request code is same as what is passed here it is 4
if (requestCode == 2) {
courseObject = (Course) data.getExtras().getSerializable("SelectedCourse");
}
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
CheckBox cb = (CheckBox) view.findViewById(R.id.checkBox);
//  TextView tv = (TextView) v.findViewById(R.id.textView1);
cb.performClick();
if (cb.isChecked()) {
// checkedValue.add(tv.getText().toString());
} else if (!cb.isChecked()) {
// checkedValue.remove(tv.getText().toString());
}
}
}
CourseViewAdapter.java
package com.technerdshub.vusocial.Activities;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
import com.technerdshub.vusocial.Models.Course;
import com.technerdshub.vusocial.Models.StudyProgramModel;
import com.technerdshub.vusocial.R;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
/**
* Created by Saroosh on 7/16/2016.
*/
public class CourseViewAdapter extends BaseAdapter {
protected CourseActivity courseActivity;
Context mContext;
LayoutInflater inflater;
private List<Course>worldpopulationlist=null;
private ArrayList<Course> arraylist;
public CourseViewAdapter(Context context, List<Course>worldpopulationlist){
mContext = context;
this.worldpopulationlist = worldpopulationlist;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<Course>();
this.arraylist.addAll(worldpopulationlist);
}
public class ViewHolder {
TextView courseCode;
TextView courseName;
CheckBox checkBox;
}
#Override
public int getCount() {
return worldpopulationlist.size();
}
#Override
public Course getItem(int position) {
return worldpopulationlist.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.c_list_item, null);
// Locate the TextViews in listview_item.xml
holder.courseName = (TextView) view.findViewById(R.id.course_name);
holder.courseCode = (TextView) view.findViewById(R.id.course_code);
holder.checkBox= (CheckBox) view.findViewById(R.id.checkBox);
// holder.duration = (TextView) view.findViewById(R.id.program_duration);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Set the results into TextViews
holder.courseName.setText(worldpopulationlist.get(position).getCourseName());
holder.courseCode.setText(worldpopulationlist.get(position).getCourseCode());
//holder.duration.setText(worldpopulationlist.get(position).getDuration());
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// Send single item click data to SingleItemView Class
Intent intent = new Intent(mContext, CourseActivity.class);
// Pass all data ran
intent.putExtra("SelectedCourse", worldpopulationlist.get(position));
// Pass all data country
courseActivity.setResult(2,intent);
courseActivity.finish();
}
});
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
worldpopulationlist.clear();
if (charText.length() == 0) {
worldpopulationlist.addAll(arraylist);
}
else
{
for (Course wp : arraylist)
{
if (wp.getCourseName().toLowerCase(Locale.getDefault()).contains(charText))
{
worldpopulationlist.add(wp);
}
}
}
notifyDataSetChanged();
}
}

Write all your checkbox logic inside you adapter getView method. That will work .

How to set alert dialog box in customize listview item by click long press

I want to set songs as a ringtone or alarm tone or message tone etc in list view by long pressing the list item. I want to show an dialog box which perform these action. How to show a dialog box by long pressing a list item and set action in dialog box? Please help me...
com.example.ring;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class Naat extends Activity implements
OnItemClickListener {
private ListView listView;
public static MediaPlayer mp;
Button bt;
PopAdapter adapter;
ArrayList<String> dataItems = new ArrayList<String>();
public static int[] rings = {R.raw.arabicmusic, R.raw.arabicmusic1, R.raw.arabicmusic12,
R.raw.arabicmusic13, R.raw.arabicmusic14, R.raw.arabicmusic15,
R.raw.arabicmusic18, R.raw.arabicmusic16, R.raw.arabicmusic17};
public static int imgadrss = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_naat);
String[] dataArray = getResources().getStringArray(R.array.listdata);
List<String> dataTemp = Arrays.asList(dataArray);
dataItems.addAll(dataTemp);
listView = (ListView) findViewById(R.id.listnaat);
// bt = (Button) findViewById(R.id.button1);
adapter = new PopAdapter(Naat.this, dataItems);
// adapter.setCustomButtonListner(MainActivity.this);
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
}
// #Override
// public void onButtonClickListner(int position, String value) {
// mp.create(this, rings[position]);
// mp.start();
//
// Toast.makeText(MainActivity.this, "Button click " + value,
// Toast.LENGTH_SHORT).show();
//
// }
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(this, "" + position, 2000).show();
imgadrss = rings[position];
}
}
Adapter class
com.example.ring;
import java.util.ArrayList;
import android.content.Context;
import android.media.MediaPlayer;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class NaatAdapter extends ArrayAdapter<String> {
customButtonListener customListner;
public interface customButtonListener {
public void onButtonClickListner(int position, String value);
}
public void setCustomButtonListner(customButtonListener listener) {
this.customListner = listener;
}
private Context context;
private ArrayList<String> data = new ArrayList<String>();
public NaatAdapter(Context context, ArrayList<String> dataItem) {
super(context, R.layout.singlerow, dataItem);
this.data = dataItem;
this.context = context;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.singlerow, null);
viewHolder = new ViewHolder();
viewHolder.text = (TextView) convertView
.findViewById(R.id.textView1);
viewHolder.button = (Button) convertView.findViewById(R.id.button1);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
final String temp = getItem(position);
viewHolder.text.setText(temp);
viewHolder.button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (customListner != null) {
customListner.onButtonClickListner(position, temp);
}
// MainActivity.mp.create(context, MainActivity.imgadrss);
// MainActivity.mp.start();
MediaPlayer mp = MediaPlayer.create(context, Naat.rings[position]);
if (mp.isPlaying()) {
if (mp != null) {
mp.pause();
}
} else {
if (mp != null) {
mp.start();
}
}
// mp.stop();
Toast.makeText(context, "" + position, 2000).show();
}
});
return convertView;
}
public class ViewHolder {
TextView text;
Button button;
}
}

You can use this
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> arg0, View v,
int index, long arg3) {
// TODO Auto-generated method stub
Log.d("in onLongClick");
//Open alert dialog here
return true;
}
});

Develop Reference

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