[android] Padding between ActionBar's home icon and title

When you are using a custom Toolbar, you can use

toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle(R.string.activity_title);
setSupportActionBar(toolbar);
getSupportActionBar().setLogo(R.drawable.logo);

and in your toolbar layout simply set app:titleMarginStart="16dp"

Note that you have to set the icon as a logo, don't use getSupportActionBar().setIcon(R.drawable.logo) instead use: getSupportActionBar().setLogo(R.drawable.logo)