Main+HomePage+TaskAdapter+utlShared

//Main

public class MainActivity extends Activity {

    private EditText name;
    private EditText password;
    SharedPreferences prefs;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /////////////////////////////////////////////////////////////////////////
        prefs=getApplicationContext().getSharedPreferences("userPrefs",MODE_PRIVATE);
        name =(EditText)findViewById(R.id.userName);
        password =(EditText)findViewById(R.id.pass);
        if(prefs.getString("logd","logd").equals("logd")) //If the user is already logdin
        {
                Intent HomePage = new Intent(this, HomePage.class);  //Pass diractly to the main menu
                HomePage.putExtra("Name", prefs.getString("userName", "exist").toString()); //Show "Hello "+ name of the user in the main menu
        }
    }
    ////////////////////////////////////////////////////////////////////////////////////////////////
    public void signUp(View v)
    {
        Intent signup = new Intent(this,Register.class);
        this.startActivity(signup);
    }
    ////////////////////////////////////////////////////////////////////////////////////////////////
    public void logIn(View v)
    {
        if (prefs.contains(name.getText().toString())|| prefs.contains(password.getText().toString()))
        {
                Intent IhomPage = new Intent(this, HomePage.class);
                IhomPage.putExtra("Name",name.getText().toString());
                SharedPreferences.Editor editor=prefs.edit();
                editor.putString("logd", "logd");
                startActivity(IhomPage);
        }
        else
        {
                Toast.makeText(this, "email or password are incorrect", Toast.LENGTH_LONG).show();
        }
    }
}
////////////////////////////////////////////////////////////////////////////////////////////////////

//home page

public class HomePage extends AppCompatActivity {

    TextView hom ;

    LinearLayout myMain;
    LinearLayout top;
    LinearLayout listLayout;
    Context context;
    ListView lv1;
    String userName;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home_page);
        hom = (TextView)findViewById(R.id.helow);
        hom.setText("Hello " + getIntent().getStringExtra("Name"));
        userName= getIntent().getStringExtra("Name");

//--------------------------------------------------------------------------------------------------
        myMain = (LinearLayout) findViewById(R.id.hom);
        listLayout = (LinearLayout) findViewById(R.id.listLayout);
        top = (LinearLayout) findViewById(R.id.top);
        lv1=(ListView)findViewById(R.id.lv1);
        context = this;

        //created new objects
        Button myButton = new Button(this);
        TaskAdapter adapter = new TaskAdapter(this, userName); //******
        //link adapter to ListView
        lv1.setAdapter(adapter);
        //set properties for new Button
        myButton.setText("+ Add new task");
        myButton.setWidth(listLayout.getWidth());
        myButton.setTextSize(30);
        myButton.setBackgroundColor(Color.GRAY);
        myButton.setGravity(Gravity.CENTER_HORIZONTAL);
        myButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                Intent IaddTask = new Intent(context,AddTaskActivity.class);
                IaddTask.putExtra("userName",getIntent().getStringExtra("Name"));
                startActivity(IaddTask);
            }
        });

        //add new elements to our LinearLayout
        myMain.addView(myButton);
    }
//__________________________________________________________________________________________________
    public void logUot(View v)
    {
        SharedPreferences prefs=getApplicationContext().getSharedPreferences("myPref",MODE_PRIVATE);
        SharedPreferences.Editor editor=prefs.edit();
        editor.remove("logd");
        editor.commit();
        finish();

    }
}



//TaskAdapter


public class TaskAdapter extends BaseAdapter
{
    //SET CONTEXT
    Context context;
    String userName;
    List<utlShared> userTasks;

    public TaskAdapter(Context context,String userName)
    {
        this.context=context;
        this.userName=userName;
        //CREATE utlShared instance
        utlShared spTasks = new utlShared(context,userName);
        //get all task into instance
        userTasks = spTasks.getAllTasks();
    }

    @Override
    public int getCount() {
        //RETURN SIZE OF ALL TASKS
        return userTasks.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        //CREATE NEW TEXT VIEW
        TextView taskName = new TextView(context);
        //PUT TASK NAME INTO TEXT VIEW
        taskName.setText(userTasks.get(position).taskName);
        //SET COLOR OF TASK
        taskName.setTextColor(userTasks.get(position).taskDone.equals("1")?Color.GREEN: Color.RED);
        //RETURN TEXTVIEW
        return taskName;

    }
}

//utlShared

  public class utlShared
    {
        private Context context;
        private SharedPreferences userPref;
        private SharedPreferences.Editor editor;
        public String taskName;
        public Boolean taskDone;
        private String userName;
        private List<utlShared> myTasks;

        //contructor for adding name to list
        public utlShared(String taskName, Boolean taskDone)
        {
            this.taskName=taskName;
            this.taskDone=taskDone;
        }

        //contructor for new utlShared instance
        public utlShared(Context context, String userName)
        {
            //get context
            this.context = context;
            //get username for shared preferances file
            this.userName=userName;
            userPref=context.getSharedPreferences(userName,Context.MODE_PRIVATE);
            editor = userPref.edit();
            //create new list
            List<utlShared> myTasks = new ArrayList<>();
            //get all tasks to list
            getTasks();
        }

        public void newTask(String taskName)
        {
            //PUT NEW TASK INTO SHARED PREFERANCES
            editor.putString(taskName,"0");
            editor.commit();
            //PUT TASK INTO LIST
            myTasks.add(new utlShared(taskName, false));
        }

        public void removeTask(String taskName)
        {
            //REMOVE TASK FROM SHARED PREFERANCES
            editor.remove(taskName);
            editor.commit();
            //REMOVE TASK FROM LIST
            myTasks.remove(taskName);
        }

        public void doneTask(String taskName, boolean taskDone)
        {
            //CHANGE TASK IN SHARED PREFERANCES
            editor.putString(taskName, taskDone ? "1" : "0");
            editor.commit();
            //REMOVE TASK FROM LIST
            myTasks.remove(taskName);
            //ADD TASK WITH NEW TASK DONE INTO LIST
            myTasks.add(new utlShared(taskName, taskDone));
        }

        public void getTasks()
        {
            //GET ALL TASK FROM SHARED PREFERANCES
            Map<String,?> tasks= userPref.getAll();
            for(Map.Entry<String,?> singleTask:tasks.entrySet())
            {
                //INSERT TASK INTO LIST
                myTasks.add(new utlShared(singleTask.getKey(),singleTask.getValue().equals("1")));
            }
        }

        public List<utlShared> getAllTasks()
        {
            //GETTER RETURN TASK LIST
            return myTasks;
        }
}