# Ads

## Configure ads in the platform

If you need to prepare `FlowplayerView` with an `ExternalVideo` and you need to add ads for this video, then there are two options - [Use an external VMAP file ](/docs/wowza-flowplayer/android-sdk/legacy/ads/#using-an-external-vmap-file) (see next section below) or [create ad breaks manually](/docs/wowza-flowplayer/android-sdk/legacy/ads/#creating-ad-breaks-manually).

### Using an external VMAP file

Create an `ExternalMedia` with a URL to an ad playlist, such as VMAP:


```js
val externalMedia = ExternalMedia("https://link.to.a.media.file", "https://link.to.a.vmap.file")
```

### Creating ad breaks manually

Create an `ExternalMedia` with a list of `AdBreak` objects, where each `AdBreak` consists of one or more ad tag URLs (such as VAST), and an offset which indicates the time when the break should start.

The following example creates an ad schedule that consists of:

* A pre-roll break with a single ad
* A mid-roll break with three ads which starts 15 seconds into the playback
* A post-roll break with a single ad



```js
val preRollBreak = AdBreak("https://link.to.a.vast.file", AdBreak.Roll.PRE)

val midRolls = arrayListOf("https://link.to.a.vast.file", "https://link.to.a.vast.file", "https://link.to.a.vast.file")
val midRollBreak = AdBreak(midRolls, 15)

val postRollBreak = AdBreak("https://link.to.a.vast.file", AdBreak.Roll.POST)

val adSchedule = arrayListOf(preRollBreak, midRollBreak, postRollBreak)

val externalMedia = ExternalMedia("https://url.to.a.media.file", adSchedule)
```