I have an activity called `Place`

I come to `Place` activity from its previous activity called `City`.

I have added back button to the toolbar in `Place` activity using the following code:

```
    Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(mToolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true)

```

I want to set the back button to go back to `City` activity

But `City` activity needs some parameters to be passed to it.

So how to tell the back button to go to City activity, without need to pass the parameters to it.