Color of drawable changes randomly while scrolling in a dynamic list android

I created a Dynamic list of Todo tasks. I want to create a random color on the background of TextView and in circle.(Like in Gmail App)

Everything works fine but when i scroll the list, the color changes again and again randomly.

Also when the keyboard pops up the color of the circle changes.

I created this list item.

The Layout of the List Item

Below is the code of the TextView having letter A.

 <TextView
    android:text="A"
    android:gravity="center"
    android:textSize="30sp"
    android:textColor="#000"
    android:layout_marginRight="20dp"
    android:id="@+id/iv"
    android:textAllCaps="true"
    android:background="@drawable/circle"
    android:layout_width="50dp"
    android:layout_height="50dp"
    />

And here the @drawable/circle Code. So every time a new item is added the color of circle changes

<shape
    xmlns:android="http://ift.tt/nIICcg"
    android:shape="oval" >
   <size
        android:width="50dp"
        android:height="50dp"/>
   </shape>

My getView code

   public View getView(int position,@Nullable View convertView, @NonNull ViewGroup parent) {
    View view = inflater.inflate(layoutResource, null);
    Drawable circle = ContextCompat.getDrawable(context,R.drawable.circle); //get the drawable circle 
    TextView name = (TextView) view.findViewById(R.id.name);
    TextView date = (TextView) view.findViewById(R.id.dateTextView);
    TextView time = (TextView) view.findViewById(R.id.timeTextView);
    TextView letter = (TextView) view.findViewById(R.id.iv);
    final items  items = todoList.get(position);



    circle.setTint(items.getColor()); 
    name.setText(items.getName());
    date.setText(items.getDate());
    time.setText(items.getTime());
    letter.setText(items.getLetter());


    return view;
}

And this code is in MainActivity when I click the + button

    Random rand = new Random();
    int max = 255,min=0;
    int r = rand.nextInt(max - min +1) - min;
    int g = rand.nextInt(max - min +1) - min;
    int b = rand.nextInt(max - min +1) - min;
    int randomColor = Color.rgb(r,g,b);


    item1.setColor(randomColor);
    item1.setName(todo);
    item1.setLetter(todo.charAt(0)+"");
    item1.setDate(date);
    item1.setTime(time);