icon in menu not showing in android

If you're running your code on Android 3.0+, the icons in the menu are not shown by design. This is a design decision by Google.

You can read more about it in this on Android developers blog.

After Long try i found below solution which might help others to save there time. Basically, the solution provided by "lbarbosa", i like to thanks to him sincerely.

Tried this based on the previous answers and it works fine, at least with more recent versions of the support library (25.1):

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

    if(menu instanceof MenuBuilder){
        MenuBuilder m = (MenuBuilder) menu;
        m.setOptionalIconsVisible(true);
    }

    return true;
}