How to display count of notifications in toolbar icon in android

Question

I would like to make an icon counter for android just like the cart. I have seen many e-commerce app cart icon count increase. I show flipkart app snapshot.:-

Answer 1

In my solution, whenever a new notification arrives, the counter will increase (as observed in shopping apps)

Try this, it works on my MOTO e2.

Make sure your API Level > 14

Create a layout like:

In onCreateOptionMenu,

@Override
public boolean onCreateOptionsMenu(Menu menu) {
   getMenuInflater().inflate(R.menu.menu_main, menu);

   MenuItem menuItem = menu.findItem(R.id.testAction);
   menuItem.setIcon(buildCounterDrawable(count,  R.drawable.ic_menu_gallery));

   return true;
}

Now, build method for Icon :

private Drawable buildCounterDrawable(int count, int backgroundImageId) {
    LayoutInflater inflater = LayoutInflater.from(this);
    View view = inflater.inflate(R.layout.counter_menuitem_layout, null);
    view.setBackgroundResource(backgroundImageId);

    if (count == 0) {
        View counterTextPanel = view.findViewById(R.id.counterValuePanel);
        counterTextPanel.setVisibility(View.GONE);
    } else {
        TextView textView = (TextView) view.findViewById(R.id.count);
        textView.setText("" + count);
    }

    view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
            View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
    view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());

    view.setDrawingCacheEnabled(true);
    view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
    Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
    view.setDrawingCacheEnabled(false);

    return new BitmapDrawable(getResources(), bitmap);
}

You can refer from here