Develop Reference

RecyclerView datas last row display with multiple time

I don't understand why my recyclerview is only showing the last row of my database although I initialised it with 150 datas.
I searched a lot in the internet and even here on SO, but not one of the solutions is working. Can you help me to figure out why my recyclerView is only showing the last row of the database? Thanks in advance to all of you.
May be you can help me. Here is my code:
package com.example.frontaddress.matedesignc;
import android.database.Cursor;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class Customer_Activity extends AppCompatActivity {
private List<String> StateListArray =new ArrayList<String>();
private List<String> StateList =new ArrayList<String>();
private List<String> CityListArray ;
private List<String> CityList ;
private Spinner dropdown_state;
private Spinner dropdown_city;
private DBHandler DB = new DBHandler(this);
private static final String BUSINESSNAME = "bussiness_name";
private static final String MOBILE = "mobile";
private static final String ADDRESS = "address";
private static final String ID = "id";
private Toolbar toolbar;
private Customer_list_Adapter adapter;
private RecyclerView recyclerView_Customer;
//ProgressDialog pDialog = new ProgressDialog(this);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_customer_list);
toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
GetStateList(); }
#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_sub, menu);
return true; }
public void CustomerDetails(String state,String city) throws IOException {
try {
List<customer_search_information> data = null;
data = new ArrayList<>();
customer_search_information current = new customer_search_information();
Cursor RST_CSTInfo = DB.getRows("customer", "id,bussiness_name,mobile,address", " state='" + state + "' AND city='" + city + "'");
while (!RST_CSTInfo.isAfterLast()) {
current.bussiness_name = RST_CSTInfo.getString(RST_CSTInfo.getColumnIndex(BUSINESSNAME));
current.state = state;
current.city = city;
current.address = RST_CSTInfo.getString(RST_CSTInfo.getColumnIndex(ADDRESS));
String Mob = RST_CSTInfo.getString(RST_CSTInfo.getColumnIndex(MOBILE));
current.mobile_no = Mob;
current.e_mail = "mail.isigntech#gmail.com";
current.id = RST_CSTInfo.getString(RST_CSTInfo.getColumnIndex(ID));
// displayExceptionMessage(current.id+current.bussiness_name+current.state+current.city+current.address+current.mobile+current.email);
data.add(current);
RST_CSTInfo.moveToNext();
}
recyclerView_Customer = (RecyclerView) findViewById(R.id.drawerListCustomer);
recyclerView_Customer.setHasFixedSize(true);
recyclerView_Customer.setHasFixedSize(true);
recyclerView_Customer.setLayoutManager(new LinearLayoutManager(this));
adapter = new Customer_list_Adapter(this, data);
recyclerView_Customer.setAdapter(adapter);
}catch (Exception e){ displayExceptionMessage(e.toString());}
}
private void GetStateList()
{ Cursor Customer= DB.getRows("customer","state", " 1 GROUP BY state");
while(!Customer.isAfterLast()){
String state=Customer.getString(Customer.getColumnIndex("state"));
StateList.add(state);
StateListArray.add(state);
Customer.moveToNext();
}
dropdown_state = (Spinner)findViewById(R.id.SpnSrch_State);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(Customer_Activity.this, android.R.layout.simple_spinner_dropdown_item, StateListArray);
dropdown_state.setAdapter(adapter);
dropdown_state.setPrompt("Choose State ");
dropdown_state.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
int item = dropdown_state.getSelectedItemPosition();
String state =StateListArray.get(item);
dropdown_city=(Spinner) findViewById(R.id.SpnSrch_State);
Cursor RstCity= DB.getRows("customer","city", "state='"+state+"' GROUP BY city");
CityListArray =new ArrayList<String>();
CityList =new ArrayList<String>();
while(!RstCity.isAfterLast()){
String city=RstCity.getString(RstCity.getColumnIndex("city"));
CityList.add(city);
CityListArray.add(city);
RstCity.moveToNext();
}
dropdown_city = (Spinner)findViewById(R.id.SpnSrch_City);
ArrayAdapter<String> cityadapter = new ArrayAdapter<String>(Customer_Activity.this, android.R.layout.simple_spinner_dropdown_item, CityListArray);
dropdown_city.setAdapter(cityadapter);
dropdown_city.setPrompt("Choose City ");
dropdown_city.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
int item = dropdown_state.getSelectedItemPosition();
String state =StateListArray.get(item);
item = dropdown_city.getSelectedItemPosition();
String city =CityListArray.get(item);
try {
CustomerDetails(state,city);
} catch (Exception e) {
displayExceptionMessage(e.toString());
e.printStackTrace();
}
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
displayExceptionMessage("Please Select State.");
}
});
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
displayExceptionMessage("Please Select City.");
}
});
}
public void displayExceptionMessage(String msg) {
//TextView Txterror=(TextView) findViewById(R.id.txterror);
Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
}
#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;
}
if (id == android.R.id.home) {
// NavUtils.navigateUpFromSameTask(this);
}
return super.onOptionsItementer code hereSelected(item);
}
}
Here is my custom list adapter code:
package com.example.frontaddress.matedesignc;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.support.v4.app.ActivityCompat;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Collections;
import java.util.List;
/**
* Created by frontaddress on 10/08/17.
*/
public class Customer_list_Adapter extends RecyclerView.Adapter<Customer_list_Adapter.CustomerViewHolder> {
private LayoutInflater inflater;
private Context contexts;
List<customer_search_information> Cst_data = Collections.emptyList();
public Customer_list_Adapter(Context context, List<customer_search_information> data) {
inflater = LayoutInflater.from(context);
this.Cst_data = data;
// Toast.makeText(contexts, data.size(), Toast.LENGTH_LONG).show();
this.contexts = context;
}
#Override
public CustomerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.content_search_staff, parent, false);
CustomerViewHolder holder = new CustomerViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(CustomerViewHolder holder, int position) {
try {
customer_search_information current = Cst_data.get(position);
Integer Pos=position;
holder.TxtBisinessName.setText(current.bussiness_name);
holder.TxtAddress.setText(current.address);
holder.Statecity.setText(current.state + "-" + current.city);
holder.Txt_Mobile.setText(current.mobile_no.toString());
holder.TxtEmail.setText(current.e_mail);
}catch (Exception e)
{
Toast.makeText(contexts,e.toString(),Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
#Override
public int getItemCount() {
return Cst_data.size();
}
class CustomerViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView TxtBisinessName;
TextView TxtAddress;
TextView Txt_Mobile;
TextView Statecity;
TextView TxtEmail;
ImageView ImgPhoneCall,ImgMailTo;
public CustomerViewHolder(View itemView) {
super(itemView);
TxtBisinessName = (TextView) itemView.findViewById(R.id.Txtbusiness_name);
Txt_Mobile = (TextView) itemView.findViewById(R.id.TxtMobile);
Statecity = (TextView) itemView.findViewById(R.id.Txtstatecity);
TxtAddress = (TextView) itemView.findViewById(R.id.Txtaddress);
TxtEmail=(TextView) itemView.findViewById(R.id.TxtEmail);
ImgPhoneCall = (ImageView) itemView.findViewById(R.id.ImgCallPhone);
ImgMailTo= (ImageView) itemView.findViewById(R.id.Imgmail);
ImgPhoneCall.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
customer_search_information current = Cst_data.get(getPosition());
String MOBILE = current.mobile_no;
try {
if (ActivityCompat.checkSelfPermission(contexts,Manifest.permission.CALL_PHONE) == PackageManager.PERMISSION_GRANTED)
{
Toast.makeText(contexts, "Call Permission Not Granted ", Toast.LENGTH_LONG).show();
return;
}
Intent callIntent = new Intent(Intent.ACTION_DIAL);
callIntent.setData(Uri.parse("tel:+91" + MOBILE));
callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
contexts.startActivity(callIntent);
}
catch (Exception e){
Toast.makeText(contexts,e.toString(),Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
});
/* TxtProfile.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
customer_search_information current = data.get(getPosition());
String SID = current.id;
Intent intent = new Intent(contexts, StudentProfileActivity.class);
intent.putExtra("id", SID);
contexts.startActivity(intent);
}
});*/
ImgMailTo.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
// TODO Auto-generated method stub
customer_search_information current = Cst_data.get(getPosition());
String EMAIL = current.e_mail;
String BName = current.bussiness_name;
Intent emailIntent = new Intent(Intent.ACTION_SEND);
emailIntent.putExtra(Intent.EXTRA_EMAIL, EMAIL);
emailIntent.putExtra(Intent.EXTRA_SUBJECT, "");
emailIntent.setType("text/plain");
emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Hi,"+BName);
final PackageManager pm = contexts.getPackageManager();
final List<ResolveInfo> matches = pm.queryIntentActivities(emailIntent, 0);
ResolveInfo best = null;
for (final ResolveInfo info : matches)
if (info.activityInfo.packageName.endsWith(".gm") || info.activityInfo.name.toLowerCase().contains("gmail"))
best = info;
if (best != null)
emailIntent.setClassName(best.activityInfo.packageName, best.activityInfo.name);
contexts.startActivity(emailIntent);
}
catch (Exception e){ }
}
});
}
#Override
public void onClick(View v) {
int ID=v.getId();
customer_search_information current=Cst_data.get(getPosition());
String SID=current.id;
// Toast.makeText(contexts,"Item Clicked Profile: "+ v.getId(), Toast.LENGTH_SHORT).show();
// Intent intent = new Intent(contexts, StudentProfileActivity.class);
// intent.putExtra("id", SID);
// contexts.startActivity(intent);
}
}
}

I think the problem is here , instead of
while(!RST_CSTInfo.isAfterLast()){
...
..
RST_CSTInfo.moveToNext();
}
try this ....
do(RST_CSTInfo.movetofirst()){
// your logic
}while(cursor.movetonext())

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();
}
});

Android Listview duplicates on15th row onwards

iam currently doing a project in which i populate a Listview from JSON.
The JSON iam passing works perfectly and my listview shows all list values properly But problem occurs when i click on any list after 10/12th list the values which i get is repeated from the first.
The respective values are not retrieved.
I also refereed other post regarding this issue but now solved my problem.
Below is my code. I hope someone will find the solution for it.
package com.desitv.geojoy;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.actionbarsherlock.app.SherlockFragment;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import com.actionbarsherlock.widget.SearchView;
import com.desitv.geojoy.R;
import com.desitv.geojoy.adapter.LatestGridAdapter;
import com.desitv.geojoy.item.ItemLatest;
import com.desitv.geojoy.util.AlertDialogManager;
import com.desitv.geojoy.util.Constant;
import com.desitv.geojoy.util.JsonUtils;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;
public class LatestFragment extends SherlockFragment {
ListView lsv_latest;
List<ItemLatest> arrayOfLatestMusic;
LatestGridAdapter objAdapter;
AlertDialogManager alert = new AlertDialogManager();
ArrayList<String> allListImageUrl,allListChannelCatName;
ArrayList<String> allListChannelId,allListChannelCatId,allListChannelUrl,allListChannelName,allListChannelDesc;
String[] allArrayImage,allArrayChannelCatName;
String[] allArrayChannelId,allArrayChannelCatId,allArrayChannelurl,allArrayChannelName,allArrayChannelDesc;
private ItemLatest objAllBean;
private int columnWidth;
JsonUtils util;
int textlength = 0;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View rootView = inflater.inflate(R.layout.fragment_latest, container, false);
setHasOptionsMenu(true);
lsv_latest=(ListView)rootView.findViewById(R.id.lsv_latest);
arrayOfLatestMusic=new ArrayList<ItemLatest>();
allListImageUrl=new ArrayList<String>();
allListChannelCatName=new ArrayList<String>();
allListChannelCatId=new ArrayList<String>();
allListChannelId=new ArrayList<String>();
allListChannelName=new ArrayList<String>();
allListChannelUrl=new ArrayList<String>();
allListChannelDesc=new ArrayList<String>();
allArrayImage=new String[allListImageUrl.size()];
allArrayChannelCatName=new String[allListChannelCatName.size()];
allArrayChannelId=new String[allListChannelId.size()];
allArrayChannelCatId=new String[allListChannelCatId.size()];
allArrayChannelurl=new String[allListChannelUrl.size()];
allArrayChannelName=new String[allListChannelName.size()];
allArrayChannelDesc=new String[allListChannelDesc.size()];
util=new JsonUtils(getActivity());
if (JsonUtils.isNetworkAvailable(getActivity())) {
new MyTask().execute(Constant.LATEST_URL);
} else {
showToast("No Network Connection!!!");
alert.showAlertDialog(getActivity(), "Internet Connection Error",
"Please connect to working Internet connection", false);
}
lsv_latest.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// TODO Auto-generated method stub
objAllBean=arrayOfLatestMusic.get(position);
int pos=objAllBean.getId();
Intent intplay=new Intent(getActivity(),TvDetails.class);
intplay.putExtra("POSITION", pos);
intplay.putExtra("CHANNEL_IMAGE", allArrayImage);
intplay.putExtra("CHANNEL_CATNAME", allArrayChannelCatName);
intplay.putExtra("CHANNEL_CATID", allArrayChannelCatId);
intplay.putExtra("CHANNEL_URL", allArrayChannelurl);
intplay.putExtra("CHANNEL_NAME", allArrayChannelName);
intplay.putExtra("CHANNEL_CID", allArrayChannelId);
intplay.putExtra("CHANNEL_DISCRIPTION", allArrayChannelDesc);
startActivity(intplay);
}
});
return rootView;
}
private class MyTask extends AsyncTask<String, Void, String> {
ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Loading...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected String doInBackground(String... params) {
return JsonUtils.getJSONString(params[0]);
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (null != pDialog && pDialog.isShowing()) {
pDialog.dismiss();
}
if (null == result || result.length() == 0) {
showToast("Server Connection Error");
alert.showAlertDialog(getActivity(), "Server Connection Error",
"May Server Under Maintaines Or Low Network", false);
} else {
try {
JSONObject mainJson = new JSONObject(result);
JSONArray jsonArray = mainJson.getJSONArray(Constant.LATEST_ARRAY_NAME);
JSONObject objJson = null;
for (int i = 0; i < jsonArray.length(); i++) {
objJson = jsonArray.getJSONObject(i);
ItemLatest objItem = new ItemLatest();
objItem.setId(objJson.getInt(Constant.CHANNEL_ID));
objItem.setCategoryId(objJson.getInt(Constant.CHANNEL_CATID));
objItem.setCategoryName(objJson.getString(Constant.CHANNEL_CAT_NAME));
objItem.setChannelName(objJson.getString(Constant.LATEST_CHANNEL_NAME));
objItem.setChannelUrl(objJson.getString(Constant.lATETST_CHANNEL_URL));
objItem.setDescription(objJson.getString(Constant.LATEST_CHANNEL_DESCRIPTION));
objItem.setImage(objJson.getString(Constant.LATEST_CHANNEL_IMAGE));
arrayOfLatestMusic.add(objItem);
}
} catch (JSONException e) {
e.printStackTrace();
}
for(int j=0;j<arrayOfLatestMusic.size();j++)
{
objAllBean=arrayOfLatestMusic.get(j);
allListImageUrl.add(objAllBean.getImage());
allArrayImage=allListImageUrl.toArray(allArrayImage);
allListChannelCatName.add(objAllBean.getCategoryName());
allArrayChannelCatName=allListChannelCatName.toArray(allArrayChannelCatName);
allListChannelId.add(String.valueOf(objAllBean.getId()));
allArrayChannelId=allListChannelId.toArray(allArrayChannelId);
allListChannelCatId.add(String.valueOf(objAllBean.getCategoryId()));
allArrayChannelCatId=allListChannelCatId.toArray(allArrayChannelCatId);
allListChannelUrl.add(String.valueOf(objAllBean.getChannelUrl()));
allArrayChannelurl=allListChannelUrl.toArray(allArrayChannelurl);
allListChannelName.add(String.valueOf(objAllBean.getChannelName()));
allArrayChannelName=allListChannelName.toArray(allArrayChannelName);
allListChannelDesc.add(objAllBean.getDescription());
allArrayChannelDesc=allListChannelDesc.toArray(allArrayChannelDesc);
}
setAdapterToListview();
}
}
}
public void setAdapterToListview() {
objAdapter = new LatestGridAdapter(getActivity(), R.layout.latest_lsv_item,
arrayOfLatestMusic,columnWidth);
lsv_latest.setAdapter(objAdapter);
}
public void showToast(String msg) {
Toast.makeText(getActivity(), msg, Toast.LENGTH_LONG).show();
}
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.menu_search, menu);
final SearchView searchView = (SearchView) menu.findItem(R.id.search)
.getActionView();
final MenuItem searchMenuItem = menu.findItem(R.id.search);
searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
// TODO Auto-generated method stub
if(!hasFocus) {
searchMenuItem.collapseActionView();
searchView.setQuery("", false);
}
}
});
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextChange(String newText) {
textlength=newText.length();
arrayOfLatestMusic.clear();
for(int i=0;i< allArrayChannelName.length;i++)
{
if(textlength <= allArrayChannelName[i].length())
{
if(newText.toString().equalsIgnoreCase((String) allArrayChannelName[i].subSequence(0, textlength)))
{
ItemLatest objItem = new ItemLatest();
objItem.setId(Integer.parseInt(allArrayChannelId[i]));
objItem.setCategoryId(Integer.parseInt(allArrayChannelCatId[i]));
objItem.setCategoryName(allArrayChannelCatName[i]);
objItem.setDescription(allArrayChannelDesc[i]);
objItem.setImage(allArrayImage[i]);
objItem.setChannelName(allArrayChannelName[i]);
objItem.setChannelUrl(allArrayChannelurl[i]);
arrayOfLatestMusic.add(objItem);
}
}
}
setAdapterToListview();
return false;
}
#Override
public boolean onQueryTextSubmit(String query) {
// Do something
return true;
}
});
}
}
LatestGridAdapter code
package com.desitv.geojoy.adapter;
import java.util.List;
import com.desitv.geojoy.R;
import com.desitv.geojoy.imageloader.ImageLoader;
import com.desitv.geojoy.item.ItemLatest;
import com.desitv.geojoy.util.Constant;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class LatestGridAdapter extends ArrayAdapter<ItemLatest>{
private Activity activity;
private List<ItemLatest> itemsLatest;
private ItemLatest objLatestBean;
private int row;
public ImageLoader imageLoader;
public LatestGridAdapter(Activity act, int resource, List<ItemLatest> arrayList, int columnWidth) {
super(act, resource, arrayList);
this.activity = act;
this.row = resource;
this.itemsLatest = arrayList;
imageLoader=new ImageLoader(activity);
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
ViewHolder holder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(row, null);
holder = new ViewHolder();
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
if ((itemsLatest == null) || ((position + 1) > itemsLatest.size()))
return view;
objLatestBean = itemsLatest.get(position);
holder.imgv_latetst=(ImageView)view.findViewById(R.id.picture);
holder.name=(TextView)view.findViewById(R.id.text);
holder.txt_category=(TextView)view.findViewById(R.id.text_category);
imageLoader.DisplayImage(Constant.SERVER_IMAGE_UPFOLDER_THUMB+objLatestBean.getImage().toString(), holder.imgv_latetst);
holder.name.setText(objLatestBean.getChannelName().toString());
holder.txt_category.setText(objLatestBean.getCategoryName().toString());
return view;
}
public class ViewHolder {
public ImageView imgv_latetst;
public TextView name,txt_category;
}
}

How do i pass the value of my username and its id to the next activity?

I want to be able to click on the "username" which will lead me to a new class - SetMed.java. Along with the username, i would like it's ID's to be passed on as well. I have tried using Intent but it does not work. Any help is greatly appreciated.
This is my MainActivity.java
package com.checkbox.main;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class ListView_CheckBoxActivity extends Activity {
//Adapter
CheckboxAdapter listItemAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Buttons and incident response
Button getValue=(Button)findViewById(R.id.get_value);
getValue.setOnClickListener(listener);
//listview
ListView list = (ListView) findViewById(R.id.list);
//Array list to store the data
ArrayList<HashMap<String, Object>> listData=new ArrayList<HashMap<String,Object>>();
String []name={"Diabetes","example","example","example","example"};
String []id={"Insulin, Glucagon, Prandin","example","example","example","example"};
for(int i=0;i<5;i++)
{
HashMap<String, Object>
map=new HashMap<String, Object>();
map.put("friend_image", R.drawable.icon);
map.put("friend_username", name[i]);
map.put("friend_id", id[i]);
map.put("selected", false);
//Add data
listData.add(map);
}
//Adapter
listItemAdapter = new CheckboxAdapter(this, listData);
list.setAdapter(listItemAdapter);
}
//Incident Response
OnClickListener listener=new OnClickListener()
{
#Override
public void onClick(View v) {
Intent intent = new Intent(ListView_CheckBoxActivity.this, SetMed.class);
boolean[] array = new boolean[5];
array[0] = CheckboxAdapter.isChecked();
intent.putExtra("status", array);
HashMap<Integer, Boolean> state =listItemAdapter.state;
String options="Medicine Selected:";
for(int j=0; j<listItemAdapter.getCount(); j++)
{
System.out.println("state.get("+j+")=="+state.get(j));
if(state.get(j)!=null)
{
#SuppressWarnings("unchecked")
HashMap<String, Object> map=(HashMap<String, Object>) listItemAdapter.getItem(j);
String username=map.get("friend_username").toString();
options+="\n"+username;
}
}
//Display selection
startActivity(intent)
}
};
}
This is my CheckBoxAdapter class.
package com.checkbox.main;
import java.util.ArrayList;
import java.util.HashMap;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.TextView;
public class CheckboxAdapter extends BaseAdapter {
Context context;
ArrayList<HashMap<String, Object>> listData;
//Record checkbox state
HashMap<Integer, Boolean> state = new HashMap<Integer, Boolean>();
// Constructor
public CheckboxAdapter(Context context, ArrayList<HashMap<String, Object>> listData)
{
this.context = context;
this.listData = listData;
}
#Override
public int getCount()
{
return listData.size();
}
#Override
public Object getItem(int position)
{
return listData.get(position);
}
#Override
public long getItemId(int position)
{
return position;
}
// Rewrite View
#Override
public View getView(final int position, View convertView, ViewGroup parent)
{
LayoutInflater mInflater = LayoutInflater.from(context);
convertView = mInflater.inflate(R.layout.item, null);
ImageView image = (ImageView) convertView.findViewById(R.id.friend_image);
image.setBackgroundResource((Integer) listData.get(position).get("friend_image"));
TextView username = (TextView) convertView.findViewById(R.id.friend_username);
username.setText((String) listData.get(position).get("friend_username"));
TextView id = (TextView) convertView.findViewById(R.id.friend_id);
id.setText((String) listData.get(position).get("friend_id"));
CheckBox check = (CheckBox) convertView.findViewById(R.id.selected);
check.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if (isChecked)
{
state.put(position, isChecked);
} else
{
state.remove(position);
}
}
});
check.setChecked((state.get(position) == null ? false : true));
return convertView;
}
public static boolean isChecked() {
// TODO Auto-generated method stub
return false;
}
Class SetMed
public class SetMed extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_set_med);
TextView diabetes = (TextView) findViewById(R.id.diabetes);
Bundle bundle = this.getIntent().getExtras();
if (bundle.getBoolean("Diabetes", false)) {
diabetes.setText("Diabetes");
} else {
diabetes.setText("");
}
}
}

Slow Application performance

I have developed a Contacts application. It does everything that a normal contacts application should does. There is always a chance of improvement. I had noticed in Android Emulator that loading for contact images starts when user has settled, he has scrolled the contact list to the area where there are chances are good that he would get contact he is searching for. So, I tried to implement the same thing on my app copy. I have implemented it. Its running very very slow. As I presume, I believe that application is running the thread multiple time even if it has retrieved the image which leads to big lagging. I am aware of the ASync task but just out of curiosity and to check whether it can be done, I don't wish to implement it here. Here is the source code for MainActivity.
package com.example.contact;
import java.io.InputStream;
import java.util.ArrayList;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.app.ListActivity;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
public class MainActivity extends ListActivity {
ListView listview;
private boolean mPaused;
private MyAdapter mAdapter;
private View view;
private boolean running = false;
final private ArrayList<String> con_ids = new ArrayList<String>();
private Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
listview = getListView();
context = this;
Cursor c = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,
null,
null,
null,
ContactsContract.Contacts.DISPLAY_NAME+" ASC");
if(c!=null)
{
for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){
con_ids.add(c.getString(c.getColumnIndex(ContactsContract.Contacts._ID)));
}
}
mAdapter = new MyAdapter(this, android.R.layout.simple_list_item_1, con_ids);
listview.setAdapter(mAdapter);
listview.setOnScrollListener(makeScrollListener());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void setEnabled(boolean enabled) {
mPaused = !enabled;
}
private AbsListView.OnScrollListener makeScrollListener() {
return new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView absListView, int scrollState) {
setEnabled(scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
running = false;
}
#Override
public void onScroll(AbsListView absListView, int i, int i1, int i2) {
String log = "";
Log.d(log, "Scroll First Item" + i);
Log.d(log, ""+ listview.getChildCount());
final int want = i;
running = true;
runOnUiThread(new Thread(new Runnable() {
int totalChild = listview.getChildCount();
int first = listview.getFirstVisiblePosition() - listview.getHeaderViewsCount();
int toRetrieve = want-first;
int id;
long con_id;
Bitmap thumbnail;
final ListView list = listview;
#Override
public void run() {
// TODO Auto-generated method stub
while(running)
{
if(!(toRetrieve<0||toRetrieve>=totalChild))
{
id = want+toRetrieve;
con_id = Long.valueOf(con_ids.get(id));
Uri ContactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, con_id);
InputStream stream = ContactsContract.Contacts.openContactPhotoInputStream(context.getContentResolver(), ContactUri);
thumbnail = BitmapFactory.decodeStream(stream);
if(thumbnail == null)
{
toRetrieve++;
continue;
}
else
{
View view = list.getChildAt(toRetrieve);
if(view == null)
{
toRetrieve++;
continue;
}
else
{
ImageView iamge = (ImageView) view.findViewById(R.id.contact_iamge);
iamge.setImageBitmap(thumbnail);
}
toRetrieve++;
}
}
else
{
running = false;
}
}
}
}));
}
};
}
}
Code for MyAdapter,
package com.example.contact;
import java.util.ArrayList;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView.FindListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class MyAdapter extends ArrayAdapter<String> {
private Context context;
private ListView listview;
private ArrayList<String> ids;
private LayoutInflater infl;
private String displayname;
private String maindetail;
private SimplifiedContact contact;
private Drawable drawable;
public MyAdapter(Context context, int ResourceId, ArrayList<String> list)
{
super(context, ResourceId, list);
this.context = context;
ids = list;
infl = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
drawable = context.getResources().getDrawable(R.drawable.person);
}
static class ViewHolder
{
public ImageView image;
public TextView display_name;
public TextView main_detail;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
contact = new SimplifiedContact(context, Long.valueOf(ids.get(position)));
if(row == null)
{
row = infl.inflate(R.layout.single_cell, parent, false);
ViewHolder viewHolder = new ViewHolder();
viewHolder.display_name =(TextView) row.findViewById(R.id.disp_name);
viewHolder.main_detail = (TextView) row.findViewById(R.id.main_detail);
viewHolder.image = (ImageView)row.findViewById(R.id.contact_iamge);
row.setTag(viewHolder);
}
ViewHolder holder = (ViewHolder) row.getTag();
holder.display_name.setText(contact.getDisplayName());
holder.main_detail.setText(contact.getMainDetail());
holder.image.setBackgroundDrawable(drawable);
return row;
}
}
I wish to know, how this lag can be reduced. Thanks in advance.

Why don't you try to take that Thread instance that you are making in runOnUiThread and put It in a field, initializing It in the onCreate. I think that you are creating several thread instaces with no use.
public class MainActivity extends ListActivity {
ListView listview;
private boolean mPaused;
private MyAdapter mAdapter;
private View view;
private boolean running = false;
final private ArrayList<String> con_ids = new ArrayList<String>();
private Context context;
Thread uiThread;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
listview = getListView();
context = this;
Cursor c = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,
null,
null,
null,
ContactsContract.Contacts.DISPLAY_NAME+" ASC");
if(c!=null)
{
for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){
con_ids.add(c.getString(c.getColumnIndex(ContactsContract.Contacts._ID)));
}
}
uiThread = new Thread(new Runnable() {
int totalChild = listview.getChildCount();
int first = listview.getFirstVisiblePosition() - listview.getHeaderViewsCount();
int toRetrieve = want-first;
int id;
long con_id;
Bitmap thumbnail;
final ListView list = listview;
#Override
public void run() {
// TODO Auto-generated method stub
while(running)
{
if(!(toRetrieve<0||toRetrieve>=totalChild))
{
id = want+toRetrieve;
con_id = Long.valueOf(con_ids.get(id));
Uri ContactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, con_id);
InputStream stream = ContactsContract.Contacts.openContactPhotoInputStream(context.getContentResolver(), ContactUri);
thumbnail = BitmapFactory.decodeStream(stream);
if(thumbnail == null)
{
toRetrieve++;
continue;
}
else
{
View view = list.getChildAt(toRetrieve);
if(view == null)
{
toRetrieve++;
continue;
}
else
{
ImageView iamge = (ImageView) view.findViewById(R.id.contact_iamge);
iamge.setImageBitmap(thumbnail);
}
toRetrieve++;
}
}
else
{
running = false;
}
}
}
});
mAdapter = new MyAdapter(this, android.R.layout.simple_list_item_1, con_ids);
listview.setAdapter(mAdapter);
listview.setOnScrollListener(makeScrollListener());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void setEnabled(boolean enabled) {
mPaused = !enabled;
}
private AbsListView.OnScrollListener makeScrollListener() {
return new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView absListView, int scrollState) {
setEnabled(scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
running = false;
}
#Override
public void onScroll(AbsListView absListView, int i, int i1, int i2) {
String log = "";
Log.d(log, "Scroll First Item" + i);
Log.d(log, ""+ listview.getChildCount());
final int want = i;
running = true;
runOnUiThread(uiThread);
}
};
}
}