Cannot remove item from Shopping Cart android studio

Cannot remove item from Shopping Cart android studio - android

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();
}
});

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import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
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Context context;
ArrayList<ListData> items = new ArrayList();
LayoutInflater inflater;
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MyViewHolder mViewHolder;
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mViewHolder = new MyViewHolder(convertView);
convertView.setTag(mViewHolder);
} else {
mViewHolder = (MyViewHolder) convertView.getTag();
}
ListData currentListData = getItem(position);
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AddOrUpdateItem.java
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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);
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iSupplier = (EditText) findViewById(R.id.iSupplier);
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bCancel = (Button) findViewById(R.id.bCancel);
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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());
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i.setTransporter(iTranport.getText().toString());
i.setLrnum(iQty.getText().toString());
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}
else{
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}
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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();
}
}

Inconsistency in setting Tags

I have a cell adapter that I use for all my listViews. The different type of lists are determined by the parameter TableType.
TableTypes 1 and 2 also use a external library that allows a slide out function for saving and deleting. As a result of this library OnClickListeners in the list views class will not work for TableType 1 and 2.
Thus I have added the OnClickListener in the cell adapter itself (The onClickListener for the "Cell" portion of the Tag). The cell adapter than uses the interface to parameter to call the necessary method.
The inconsistency here is that TableType 1 performs correctly without error. TableType 2 does not however as the Tag returns the position of the item above it.
I.E. if TableType 2 has 4 items, Item 2 will have Tag 1, Item 3 will have Tag 2. I'm not sure why this is happening because the code is identical between TableType 1 and 2.
CellAdapter:
package layout;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.media.Image;
import android.nfc.Tag;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.widget.RecyclerView;
import android.widget.ArrayAdapter;
import android.content.Context;
import android.view.View;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import android.preference.PreferenceManager;
import android.widget.ImageView;
import android.widget.TextView;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import com.chauthai.swipereveallayout.SwipeRevealLayout;
import com.tble.brgo.InfoArticle;
import com.tble.brgo.R;
import android.graphics.Typeface;
import android.widget.Filterable;
import android.widget.Filter;
import org.w3c.dom.Text;
/**
* Created by Praveen on 8/21/16.
*/
public class StandardCellAdapter extends ArrayAdapter<InfoArticle> implements Filterable {
public ArrayList<InfoArticle> orig;
public ArrayList<InfoArticle> Teachers;
public SwipeRevealLayout swipeV;
public TextView deleteButton;
public TextView saveButton;
public int tableType;
public displayInterface activity;
public Context ct;
public StandardCellAdapter(Context context, ArrayList<InfoArticle> titles, int tableType, displayInterface inter) {
super(context, 0, titles);
this.Teachers = titles;
this.tableType = tableType;
saveButton = new TextView(context);
deleteButton = new TextView(context);
activity = inter;
ct = context;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get the data item for this position
String title = getItem(position).title;
String desc = getItem(position).description;
Holder TagHolder = null;
TextView Ctitle;
// Check if an existing view is being reused, otherwise inflate the view
if (convertView == null) {
if (tableType == 0) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.nclayout, parent, false);
Ctitle = (TextView) convertView.findViewById(R.id.cellTitle);
}
else if(tableType == 1){
convertView = LayoutInflater.from(getContext()).inflate(R.layout.sclayout, parent, false);
Ctitle = (TextView) convertView.findViewById(R.id.cellTitle);
TagHolder = new Holder();
swipeV = (SwipeRevealLayout)convertView.findViewById(R.id.scSwipe);
saveButton = (TextView)convertView.findViewById(R.id.saveButton);
TagHolder.Save = saveButton;
TagHolder.Cell = Ctitle;
convertView.setTag(TagHolder);
}
else{
convertView = LayoutInflater.from(getContext()).inflate(R.layout.tclayout, parent, false);
Ctitle = (TextView) convertView.findViewById(R.id.cellTitle);
TagHolder = new Holder();
swipeV = (SwipeRevealLayout)convertView.findViewById(R.id.tcSwipe);
deleteButton = (TextView) convertView.findViewById(R.id.deleteButton);
TagHolder.Delete = deleteButton;
TagHolder.Cell = Ctitle;
convertView.setTag(TagHolder);
}
}
else {
TagHolder = (Holder) convertView.getTag();
Ctitle = (TextView) convertView.findViewById(R.id.cellTitle);
}
if(tableType == 1) {
TagHolder.Save.setTag(position);
TagHolder.Save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
saveTeacher((int)v.getTag());
}
});
TagHolder.Cell.setTag(position);
TagHolder.Cell.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
activity.displayWebpage(getItem((int)v.getTag()).description);
}
});
}
else if(tableType == 2) {
TagHolder.Delete.setTag(position);
deleteButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
deleteTeacher((int)v.getTag());
if(Teachers.size() == 0)
Teachers.add(new InfoArticle("Slide to Save Teachers", "google.com"));
notifyDataSetChanged();
}
});
TagHolder.Cell.setTag(position);
TagHolder.Cell.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
activity.displayWebpage(getItem((int)v.getTag()).description);
}
});
}
Typeface customFont = Typeface.SERIF;
Ctitle.setTypeface(customFont);
Ctitle.setText(title);
return convertView;
}
public Filter getFilter() {
return new Filter() {
#Override
protected FilterResults performFiltering(CharSequence constraint) {
final FilterResults oReturn = new FilterResults();
final ArrayList<InfoArticle> results = new ArrayList<InfoArticle>();
if (orig == null)
orig = Teachers;
if (constraint != null) {
if (orig != null && orig.size() > 0) {
for (final InfoArticle g : orig) {
if (g.title.toLowerCase()
.contains(constraint.toString().toLowerCase())) {
results.add(g);
}
}
}
oReturn.values = results;
}
return oReturn;
}
#SuppressWarnings("unchecked")
#Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
Teachers = (ArrayList<InfoArticle>)results.values;
notifyDataSetChanged();
}
};
}
#Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
public ArrayList<InfoArticle> toIA(ArrayList<String> data){
ArrayList<InfoArticle> converted = new ArrayList<InfoArticle>();
for(String a: data)
{
converted.add(new InfoArticle(a,""));
}
return converted;
}
#Override
public int getCount() {
return Teachers.size();
}
#Override
public InfoArticle getItem(int position) {
return Teachers.get(position);
}
public void saveTeacher(int position){
SharedPreferences sharedPref = getContext().getSharedPreferences("MY_PREFERENCES",Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
Set<String> teach = sharedPref.getStringSet("teachPref", new HashSet<String>());
teach.add(Teachers.get(position).title);
Set<String> link = sharedPref.getStringSet("linkPref", new HashSet<String>());
link.add(Teachers.get(position).description);
editor.putStringSet("teachPref", teach);
editor.putStringSet("linkPref", link);
editor.apply();
new AlertDialog.Builder(getContext())
.setTitle("Teacher Saved")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
}
}).setIcon(android.R.drawable.ic_dialog_alert)
.show();
swipeV.close(true);
}
private void deleteTeacher(int position){
SharedPreferences sharedPref = getContext().getSharedPreferences("MY_PREFERENCES",Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
Set<String> teach = sharedPref.getStringSet("teachPref", new HashSet<String>());
Set<String> link = sharedPref.getStringSet("linkPref", new HashSet<String>());
teach.remove(Teachers.get(position).title);
link.remove(Teachers.get(position).description);
editor.putStringSet("teachPref", teach);
editor.putStringSet("linkPref", link);
editor.apply();
Teachers.remove(position);
new AlertDialog.Builder(getContext())
.setTitle("Teacher Deleted")
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
}
}).setIcon(android.R.drawable.ic_dialog_alert)
.show();
swipeV.close(false);
}
class Holder{
TextView Delete;
TextView Save;
TextView Cell;
}
}

Turns out the problem wasn't due to the tags it was how I was saving my data. TableType 2 is used to display data from 2 different Hashsets which are then combined. Because Hashsets don't care about order, I my combined ArrayList would be mismatched due the lack of order. I fixed this by saving my ArrayList as a JSON serialized String.

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

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.

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