Privacy Policy

Effective date: January 05, 2019


My Class ("us", "we", or "our") operates the My Class mobile application (the "Service").

This page informs you of our policies regarding the collection, use, and disclosure of personal data when you use our Service and the choices you have associated with that data. Our Privacy Policy  for My Class is based on the Free Privacy Policy Template Website.

We use your data to provide and improve the Service. By using the Service, you agree to the collection and use of information in accordance with this policy. Unless otherwise defined in this Privacy Policy, terms used in this Privacy Policy have the same meanings as in our Terms and Conditions.

Information Collection And Use

We collect several different types of information for various purposes to provide and improve our Service to you.

Types of Data Collected

Personal Data

While using our Service, we may ask you to provide us with certain personally identifiable information that can be used to contact or identify you ("Personal Data"). Personally identifiable information may include, but is not limited to:

Email address

First name and last name

Phone number

Address, State, Province, ZIP/Postal code, City

Cookies and Usage Data

Usage Data

When you access the Service by or through a mobile device, we may collect certain information automatically, including, but not limited to, the type of mobile device you use, your mobile device unique ID, the IP address of your mobile device, your mobile operating system, the type of mobile Internet browser you use, unique device identifiers and other diagnostic data ("Usage Data").

Tracking & Cookies Data

We use cookies and similar tracking technologies to track the activity on our Service and hold certain information.
Cookies are files with small amount of data which may include an anonymous unique identifier. Cookies are sent to your browser from a website and stored on your device. Tracking technologies also used are beacons, tags, and scripts to collect and track information and to improve and analyze our Service.
You can instruct your browser to refuse all cookies or to indicate when a cookie is being sent. However, if you do not accept cookies, you may not be able to use some portions of our Service.
Examples of Cookies we use:

   

Session Cookies. We use Session Cookies to operate our Service.

   

Preference Cookies. We use Preference Cookies to remember your preferences and various settings.

   

Security Cookies. We use Security Cookies for security purposes.

Use of Data

   
My Class uses the collected data for various purposes:
   

   

To provide and maintain the Service

   

To notify you about changes to our Service

   

To allow you to participate in interactive features of our Service when you choose to do so

   

To provide customer care and support

   

To provide analysis or valuable information so that we can improve the Service

   

To monitor the usage of the Service

   

To detect, prevent and address technical issues

Transfer Of Data

Your information, including Personal Data, may be transferred to — and maintained on — computers located outside of your state, province, country or other governmental jurisdiction where the data protection laws may differ than those from your jurisdiction.
If you are located outside India and choose to provide information to us, please note that we transfer the data, including Personal Data, to India and process it there.
Your consent to this Privacy Policy followed by your submission of such information represents your agreement to that transfer.
My Class will take all steps reasonably necessary to ensure that your data is treated securely and in accordance with this Privacy Policy and no transfer of your Personal Data will take place to an organization or a country unless there are adequate controls in place including the security of your data and other personal information.

Disclosure Of Data

Legal Requirements

My Class may disclose your Personal Data in the good faith belief that such action is necessary to:

   

To comply with a legal obligation

   

To protect and defend the rights or property of My Class

   

To prevent or investigate possible wrongdoing in connection with the Service

   

To protect the personal safety of users of the Service or the public

   

To protect against legal liability

Security Of Data

The security of your data is important to us, but remember that no method of transmission over the Internet, or method of electronic storage is 100% secure. While we strive to use commercially acceptable means to protect your Personal Data, we cannot guarantee its absolute security.

Service Providers

We may employ third party companies and individuals to facilitate our Service ("Service Providers"), to provide the Service on our behalf, to perform Service-related services or to assist us in analyzing how our Service is used.
These third parties have access to your Personal Data only to perform these tasks on our behalf and are obligated not to disclose or use it for any other purpose.

Analytics

We may use third-party Service Providers to monitor and analyze the use of our Service.
   

           

        Firebase
        Firebase is analytics service provided by Google Inc.
        You may opt-out of certain Firebase features through your mobile device settings, such as your device advertising settings or by following the instructions provided by Google in their Privacy Policy: https://policies.google.com/privacy?hl=en
        We also encourage you to review the Google's policy for safeguarding your data: https://support.google.com/analytics/answer/6004245. For more information on what type of information Firebase collects, please visit please visit the Google Privacy & Terms web page: https://policies.google.com/privacy?hl=en
   
                       

Links To Other Sites

Our Service may contain links to other sites that are not operated by us. If you click on a third party link, you will be directed to that third party's site. We strongly advise you to review the Privacy Policy of every site you visit.
We have no control over and assume no responsibility for the content, privacy policies or practices of any third party sites or services.

Children's Privacy

Our Service does not address anyone under the age of 18 ("Children").
We do not knowingly collect personally identifiable information from anyone under the age of 18. If you are a parent or guardian and you are aware that your Children has provided us with Personal Data, please contact us. If we become aware that we have collected Personal Data from children without verification of parental consent, we take steps to remove that information from our servers.

Changes To This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page.
We will let you know via email and/or a prominent notice on our Service, prior to the change becoming effective and update the "effective date" at the top of this Privacy Policy.
You are advised to review this Privacy Policy periodically for any changes. Changes to this Privacy Policy are effective when they are posted on this page.

Contact Us

If you have any questions about this Privacy Policy, please contact us:

       

By email: lalit.poptani@gmail.com

         
       

Swiping the ListView elements

Android - Steps to run GCM Demo

I would insist to first go through Android Docs and then try to implement using below steps.

Make sure you have installed Apache Tomcat and Apache Ant.

Steps:-

1.) Make sure you have dowloaded support library from SDK Manager -> "Google Cloud Messaging             for Android Library".
2.) This will add "gcm" folder with demo application in your SDK folder.
3.) So go to "your_sdk\extras\google\gcm\samples\gcm-demo-server\WebContent\WEB-INF\classes\api.key". And here enter your API-KEY that you got from registering to
    Google Console.

4.)

•     Now you have to set System variables for Ant upto its "bin". So, edit Path and append it at the end using a semi-colon - "your_path\apache-ant-1.8.4\bin".
•     Now set the user variable for "JAVA_HOME" - "C:\Program Files\Java\jdk1.6.0_23"(without "bin") and Ant upto its "bin" folder. Go to cmd and type ant.

Buildfile: build.xml does not exist!
Build failed

If you get above error means your Ant is working fine.

5.) Now go to "your_sdk\extras\google\gcm\samples\gcm-demo-server" and type ant.

If successful you will see output like,


init:
    [mkdir] Created dir: your_sdk\extras\google\gcm\samples\gcm-demo-
server\build\classes
    [mkdir] Created dir: your_sdk\extras\google\gcm\samples\gcm-demo-
server\dist

compile:
    [javac] Compiling 7 source files to your_sdk\extras\google\gcm\sa
mples\gcm-demo-server\build\classes

war:
      [war] Building war: your_sdk\extras\google\gcm\samples\gcm-demo
-server\dist\gcm-demo.war

dist:

BUILD SUCCESSFUL
Total time: 0 seconds


Also you will see a "dist" folder created with "gcm-demo.war" file.

6.) Now start your apache tomcat server and check that its working fine by running it using "http://your_host_ip:8080/"
7.) If its working fine go to "C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\copy gcm-demo.war" here.
8.) Restart your Server and open the gcm-demo in browser - "http://your_host_ip:8080/gcm-demo/"

You will see result as,

Unregistered device #0
No devices registered!

So, server side is completed now.


9.) Now, import "gcm-demo-client" Application from "your_sdk\extras\google\gcm\samples\gcm-demo-client"
10.) Open "CommonUtilities.java" - here you need to give
SERVER_URL="http://your_host_ip/gcm-demo/" and
SENDER_ID="sender id you got from google console url".
11.) Build "gcm-demo-client" into your Android Device to register to your Server

Succesfully sent message to device #0
1 device(s) registered!

You will see above output if successfully registered will a send button.

12.) Press Send Button to get Notification on your device.

You can find the sorce demo from github, it also include the gcm-demo.war file that you have to deploy. The things that are required to be change are,

1.) API Key,
2.) SENDER_ID
3.) SERVER_URL

Thanks :)

Section Adapter

I found an interested post about SectionAdapter by Jeff Sharkey. I will insist that it is the better way of creating SectionAdapter in the way that Jeff has opted here in his blog.

The blog just says to use seperate Adapter for every Header, so that we can customize it easily in the best possible way. The idea is very much clear and interesting. So, we can customize it and create as required by us. Below is how we can customize the SectionAdapter.

SectionedAdapter.java

abstract public class SectionedAdapter extends BaseAdapter {
    
    String TAG = getClass().getSimpleName();
    
    abstract protected View getHeaderView(String caption, int index, View convertView, ViewGroup parent);
    
    private List<Section> sections = new ArrayList<Section>();
    private static int TYPE_SECTION_HEADER = 0;
    
    public SectionedAdapter() {
        super();
        sections.clear();
    }
    
    public void addSection(String caption, Adapter adapter) {
        sections.add(new Section(caption, adapter));
    }
    
    public void clear() {
        sections.clear();
        notifyDataSetChanged();
    }
    
    public Object getItem(int position) {
        for (Section section : this.sections) {
            if (position == 0) {
                return (section);
            }
            
            int size = section.adapter.getCount() + 1;
            
            if (position < size) {
                return (section.adapter.getItem(position - 1));
            }
            position -= size;
        }
        return (null);
    }
    
    public int getCount() {
        int total = 0;
        
        for (Section section : this.sections) {
            total += section.adapter.getCount() + 1; // add one for header
        }
        return (total);
    }
    
    public int getViewTypeCount() {
        int total = 1; // one for the header, plus those from sections
        
        for (Section section : this.sections) {
            total += section.adapter.getViewTypeCount();
        }
        return (total);
    }
    
    public int getItemViewType(int position) {
        int typeOffset = TYPE_SECTION_HEADER + 1; // start counting from here
        
        for (Section section : this.sections) {
            if (position == 0) {
                return (TYPE_SECTION_HEADER);
            }
            
            int size = section.adapter.getCount() + 1;
            
            if (position < size) {
                int value = (typeOffset + section.adapter
                .getItemViewType(position - 1));
                return value;
            }
            
            position -= size;
            typeOffset += section.adapter.getViewTypeCount();
        }
        return (-1);
    }
    
    public boolean areAllItemsSelectable() {
        return (false);
    }
    
    public boolean isEnabled(int position) {
        return (getItemViewType(position) != TYPE_SECTION_HEADER);
    }
    
    public View getView(int position, View convertView, ViewGroup parent) {
        int sectionIndex = 0;
        
        for (Section section : this.sections) {
            if (position == 0) {
                return (getHeaderView(section.caption, sectionIndex, convertView, parent));
            }
            
            int size = section.adapter.getCount() + 1;
            
            if (position < size) {
                return (section.adapter.getView(position - 1, convertView, parent));
            }
            
            position -= size;
            sectionIndex++;
        }
        return (null);
    }
    
    public long getItemId(int position) {
        return (position);
    }
    
    class Section {
        String caption = null;
        Adapter adapter = null;
        
        Section(String caption, Adapter adapter) {
            this.caption = caption;
            this.adapter = adapter;
        }
    }
}

Above class is abstract and having an abstract method getHeaderView(String caption, int index, View convertView, ViewGroup parent) that is because we can easily customize the Header Section also dynamically from our Activity. In Above class we have an inner class Section that does the work of maintaining every Header having its own Adapter. So, the class is nicely set-up to be used.
So, now we will create an Activity having a ListView,

MainActivity.java

public class MainActivity extends Activity {
    
    ListView mListView;
    ArrayList<String> mArrayList = new ArrayList<String>();
    SectionedAdapter adapter;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        mListView = (ListView) findViewById(R.id.listview);
        
        adapter = new SectionedAdapter() {
            
            @Override
            protected View getHeaderView(String caption, int index,
            View convertView, ViewGroup parent) {
                convertView = getLayoutInflater().inflate(R.layout.section_header, null);
                TextView header = (TextView) convertView.findViewById(R.id.header);
                header.setText(caption);
                return convertView;
            }
        };
        
        for (int i = 0; i < 5; i++) {
            mArrayList.add("Item " + i);
            MyAdapter myAdapter = new MyAdapter();
            adapter.addSection("Header " + i, myAdapter);
        }
        mListView.setOnItemClickListener(new OnItemClickListener() {
            
            public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
                Toast.makeText(getApplicationContext(), arg0.getAdapter().getItem(position).toString(), Toast.LENGTH_LONG).show();
            }
        });
        mListView.setAdapter(adapter);
    }
    
    class MyAdapter extends BaseAdapter {
        
        public int getCount() {
            return mArrayList.size();
        }
        
        public Object getItem(int position) {
            return mArrayList.get(position);
        }
        
        public long getItemId(int position) {
            return position;
        }
        
        public View getView(int position, View convertView, ViewGroup parent) {
            convertView = (TextView) getLayoutInflater().inflate(R.layout.section_item, null);
            TextView item = (TextView) convertView.findViewById(R.id.item);
            item.setText(mArrayList.get(position));
            return convertView;
        }
    }
}

So, what we have in the Activity class is an instance of SectionedAdapter adapter; class with override method getHeaderView(String caption, int index, View convertView, ViewGroup parent)  by which we can inflate any xml and create our own custom Header. Also I had created an inner class MyAdapter that extends BaseAdapter which will be used as an Adapter for each Header. To add an Seperator as Header we can use addSection(String Caption, Adapter adapter) method to add the Header caption and a seperate Adapter related to that Header. In this way you can create seperate Adapter for each Header and link to it. I am attaching Demo source code for the same. Enjoy!!!!

How to update Activity from Service using ResultReceiver

Today I am going to show how can we update Activity using android.os.ResultReceiver. What we need is just create and inner class inside an Activity that extends ResultReceiver and override its onReceiveResult() methods that will be called while sending data from Service class and inside this method we can update UI components.


What I will show in Demo?
I will just create an Activity with a TextView and update the TextView with current seconds of time.


So, create an Activity with main.xml having a TextView. Also, an inner class that extends ResultReceiver and  a class that extends Runnable to be used for runOnUiThread.



public class ResultReceiverDemoActivity extends Activity{

Intent intent;
TextView txtview;
MyResultReceiver resultReceiver;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

resultReceiver = new MyResultReceiver(null);
txtview = (TextView) findViewById(R.id.txtview);
intent = new Intent(this, MyService.class);
intent.putExtra("receiver", resultReceiver);
startService(intent);
}

@Override
protected void onDestroy() {
super.onDestroy();
stopService(intent);
}


class UpdateUI implements Runnable
{
String updateString;

public UpdateUI(String updateString) {
this.updateString = updateString;
}
public void run() {
txtview.setText(updateString);
}
}

class MyResultReceiver extends ResultReceiver
{
public MyResultReceiver(Handler handler) {
super(handler);
}

@Override
protected void onReceiveResult(int resultCode, Bundle resultData) {

if(resultCode == 100){
runOnUiThread(new UpdateUI(resultData.getString("start")));
}
else if(resultCode == 200){
runOnUiThread(new UpdateUI(resultData.getString("end")));
}
else{
runOnUiThread(new UpdateUI("Result Received "+resultCode));
}
}
}
}

As, you can see there is nothing much in the above code just a simple one. The new thing about you would be the class that extends ResultReceiver. It is having an overrided method onReceiveResult(int resultCode, Bundle resultData) with parameters resultCode and Bundle. These two parameters we will pass from the Service class using send(resultCode, Bundle resultData) of ResultReceiver which will be pass to onReceiveResult(int resultCode, Bundle resultData) where we can update the UI.

Also, one more important thing is that you might have seen that I am passing a putExtra to Service class as
intent.putExtra("receiver", resultReceiver); where resultReceiver is the instance of MyResultReceiver class that extends ResultReceiver. We will get the putExtra in the Service class and use the same instance to send data from Service to Activity using send(resultCode, Bundle resultData).


Now, lets add the Service class that is also a simple one having a Timer with 1 second.



public class MyService extends Service{

Timer timer = new Timer();
MyTimerTask timerTask;
ResultReceiver resultReceiver;

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

resultReceiver = intent.getParcelableExtra("receiver");

timerTask = new MyTimerTask();
timer.scheduleAtFixedRate(timerTask, 1000, 1000);
return START_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
super.onDestroy();
timer.cancel();
Bundle bundle = new Bundle();
bundle.putString("end", "Timer Stopped....");
resultReceiver.send(200, bundle);
}

class MyTimerTask extends TimerTask
{
public MyTimerTask() {
Bundle bundle = new Bundle();
bundle.putString("start", "Timer Started....");
resultReceiver.send(100, bundle);
}
@Override
public void run() {
SimpleDateFormat dateFormat = new SimpleDateFormat("s");
resultReceiver.send(Integer.parseInt(dateFormat.format(System.currentTimeMillis())), null);
}
}
}

So, simply we are getting the putExtra of ResultReceiver's instance using resultReceiver = intent.getParcelableExtra("receiver"); inside onStartCommand() to use it further for sending the data to Activity. You can send any data to Activity using send(resultCode, Bundle resultData) method of ResultReceive, you can send an error message also with the same method checking the resultCode.
Source code can be found here.

Calling SOAP WebService using HTTPPOST and getting response in XML.

Today I am going to show you how we can call soap web-service using HTTP-POST. As we know for calling SOAP web-service you require ksoap jar to be added to your project and you can call it. But, sometimes when you have complex response from SOAP web-services its very difficult to parse.So, my motive in this post is to call the SOAP web-service and get the response in XML rather than getting response in SOAP. Though you can get the request by using "requestDump" & response in XML by using "responseDump" as

HttpTransportSE androidHttpTransport = new HttpTransportSE(URL, timeout);
androidHttpTransport.debug=true;
androidHttpTransport.call(SOAP_ACTION, envelope);
String requestString = androidHttpTransport.requestDump;
Log.d("Request in XML", requestString);
String response = androidHttpTransport.responseDump;
Log.d("Response in XML", response);

So, what you can do is create a file with an Request and keep it inside assets folder of your project. Also you have to add %s in place of paramters if you want to pass dynamic parameters to your web-service. I am going to use a live web-service from www.w3schools.com so that you can test the source code directly if you don't have your own web-service.


I am going to use a web-service that will convert Celcius to Fahrenheit. Below is my request.xml in assets folder.

<?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<CelsiusToFahrenheit xmlns="http://tempuri.org/">
<Celsius>%s</Celsius>
</CelsiusToFahrenheit>
</soap:Body>
</soap:Envelope>

You can see I am using %s in place of Celcius value because I am going to pass the parameter dynamically from the code not a static one. Now we have to read the xml from assets folder and pass parameter to it dynamically. Below is how you can read the xml from assets folder and convert it to String.

public static String convertStreamToString(InputStream is) throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();
    String line = null;
    while ((line = reader.readLine()) != null) {
        sb.append(line+"\n");
    }
    is.close();
    return sb.toString();
}

You can just pass InputStream to this method and get the xml as response from this method. Just call it by

String xml = convertStreamToString(getAssets().open("request.xml"));

Now, you have the xml String you need to pass the parameter that is the value of Celcius, so you can do that by using String.format(String format, Object...args)
In this case you can do it as

String RequestString = String.format(xml, "12"); (If you have multiple paramters you can pass it by comma seperated)

Now you have your Request String ready to be passed to HTTPPost and get the Response. So, just pass the URL and RequestString to get the Response.
I had just created a simple method that will except the arguments as URL of our web-service and a String request that is the xml from assets folder.

public String getResponseByXML(String URL, String request) {
    HttpPost httpPost = new HttpPost(URL);
    StringEntity entity;
    String response_string = null;
    try {
        entity = new StringEntity(request, HTTP.UTF_8);
        httpPost.setHeader("Content-Type","text/xml;charset=UTF-8");
        httpPost.setEntity(entity);
        HttpClient client = new DefaultHttpClient();
        HttpResponse response = client.execute(httpPost);
        response_string = EntityUtils.toString(response.getEntity());
        Log.d("request", response_string);
        } catch (Exception e) {
        e.printStackTrace();
    }
    return response_string;
}

Call above method to get the HTTP-POST Response using the URL and Request String that we created with parameter.

private String URL = "http://www.w3schools.com/webservices/tempconvert.asmx";
String ResponseInXML = getResponseByXML(URL,  RequestString);
Log.d("ResponseInXML", ResponseInXML);

So, you will get your response in ResponseInXML . Then you can easily parse ResponseInXML  using any XML Parser. You can checkout for a Demo example for github.

ListView with CheckBox Scrolling Issue

Today I am going to show how to deal with Custom ListView having Chekbox. Many developers are facing the issue of Checkbox item getting uncheck or check while scrolling the ListView. So, I will make it clear to developers how to deal with ListView having Checkbox. You can learn about the recycling of view in ListView from this Blog.

The issue with CheckBox inside ListView is that the view gets recycled due to recycling of ListView and the value of Checkbox(check or uncheck) is not maintained. To, maintain the state to CheckBox there has to be something that can store the state of Checkbox.

So, we have a Model class that will have name and selected property of ListView row having TextView and CheckBox.

Model.java

public class Model {
    
    private String name;
    private boolean selected;
    
    public Model(String name) {
        this.name = name;
    }
    
    public String getName() {
        return name;
    }
    
    public boolean isSelected() {
        return selected;
    }
    
    public void setSelected(boolean selected) {
        this.selected = selected;
    }
}

Now, we will setup the main Activity that will set the Adapter for the Custom ListView.

MainActivity.java

public class MainActivity extends Activity implements OnItemClickListener{
    
    ListView listView;
    ArrayAdapter<Model> adapter;
    List<Model> list = new ArrayList<Model>();
    
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        
        listView = (ListView) findViewById(R.id.my_list);
        adapter = new MyAdapter(this,getModel());
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(this);
    }
    
    @Override
    public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {
                TextView label = (TextView) v.getTag(R.id.label);
CheckBox checkbox = (CheckBox) v.getTag(R.id.check);
Toast.makeText(v.getContext(), label.getText().toString()+" "+isCheckedOrNot(checkbox), Toast.LENGTH_LONG).show();
    }
    
    private String isCheckedOrNot(CheckBox checkbox) {
        if(checkbox.isChecked())
        return "is checked";
        else
        return "is not checked";
    }
    
    private List<Model> getModel() {
        list.add(new Model("Linux"));
        list.add(new Model("Windows7"));
        list.add(new Model("Suse"));
        list.add(new Model("Eclipse"));
        list.add(new Model("Ubuntu"));
        list.add(new Model("Solaris"));
        list.add(new Model("Android"));
        list.add(new Model("iPhone"));
        list.add(new Model("Java"));
        list.add(new Model(".Net"));
        list.add(new Model("PHP"));
        return list;
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ListView
android:id="@+id/my_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />

</LinearLayout>

row.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content" >

<TextView
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@+id/label"
android:textSize="30sp" >
</TextView>

<CheckBox
android:id="@+id/check"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginLeft="4dip"
android:layout_marginRight="10dip"
android:focusable="false"
android:focusableInTouchMode="false" >
</CheckBox>

</RelativeLayout>

Finally, now we will have the Adapter class.

MyAdapter.java

public class MyAdapter extends ArrayAdapter<Model> {
    
    private final List<Model> list;
    private final Activity context;
    boolean checkAll_flag = false;
    boolean checkItem_flag = false;
    
    public MyAdapter(Activity context, List<Model> list) {
        super(context, R.layout.row, list);
        this.context = context;
        this.list = list;
    }
    
    static class ViewHolder {
        protected TextView text;
        protected CheckBox checkbox;
    }
    
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        
        ViewHolder viewHolder = null;
        if (convertView == null) {
            LayoutInflater inflator = context.getLayoutInflater();
            convertView = inflator.inflate(R.layout.row, null);
            viewHolder = new ViewHolder();
            viewHolder.text = (TextView) convertView.findViewById(R.id.label);
            viewHolder.checkbox = (CheckBox) convertView.findViewById(R.id.check);
            viewHolder.checkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    int getPosition = (Integer) buttonView.getTag();  // Here we get the position that we have set for the checkbox using setTag.
                    list.get(getPosition).setSelected(buttonView.isChecked()); // Set the value of checkbox to maintain its state.
                }
            });
            convertView.setTag(viewHolder);
            convertView.setTag(R.id.label, viewHolder.text);
            convertView.setTag(R.id.check, viewHolder.checkbox);
            } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.checkbox.setTag(position); // This line is important.
        
        viewHolder.text.setText(list.get(position).getName());
        viewHolder.checkbox.setChecked(list.get(position).isSelected());
        
        return convertView;
    }
}

So, the important line in the above Adapter class is to setTag() position of CheckBox and then retrieve it using getTag() inside onCheckedChanged() and then set the current state of CheckBox in your Model class instance. I am also attaching the complete source code for the same so that anyone can download and understand that how it works. Here is the complete source code.