PreviewChannelHelper

fun deletePreviewChannel(channelId: Long): Unit

Removes a preview channel from the system's content provider (aka TvProvider).

fun deletePreviewProgram(programId: Long): Unit

Removes programs from a preview channel.

fun getAllChannels(): (Mutable)List<PreviewChannel!>!

The TvProvider does not allow select queries. Hence, unless you are querying for a single PreviewChannel by id, you must get all of your channels at once and then use the returned list as necessary.

fun getPreviewChannel(channelId: Long): PreviewChannel?

Retrieves a single preview channel from the TvProvider. When you publish a preview channel, the TvProvider assigns an ID to it. That's the channelId to use here.

fun getPreviewProgram(programId: Long): PreviewProgram?

Retrieves a single preview program from the system content provider (aka TvProvider).

fun getWatchNextProgram(programId: Long): WatchNextProgram?

Retrieves a single WatchNext program from the system content provider (aka TvProvider).

fun publishChannel(channel: PreviewChannel): Long

Publishing a channel to the TV home screen is a two step process: first, you add the channel to the TV content provider; second, you make the channel browsable (i.e. visible). This method adds the channel to the TV content provider for you and returns a channelId. Next you must use the channelId to make the channel browsable. There are two ways you can make a channel browsable: a) For your first channel, simply ask the system to make the channel browsable: TvContractCompat.requestChannelBrowsable(context,channelId) b) For any additional channel beyond the first channel, you must get permission from the user. So if this channel is not your first channel, you must request user permission through the following intent. So take the channelId returned by this method and do the following inside an Activity or Fragment:

intent = new Intent(TvContractCompat.ACTION_REQUEST_CHANNEL_BROWSABLE);
intent.putExtra(TvContractCompat.EXTRA_CHANNEL_ID, channelId);
startActivityForResult(intent, REQUEST_CHANNEL_BROWSABLE);

Creating a PreviewChannel, you may pass to the builder a url as your logo. In such case, updatePreviewChannel will load the logo over the network. To use your own networking code, override downloadBitmap.

fun publishDefaultChannel(channel: PreviewChannel): Long

This is a convenience method that simply publishes your first channel for you. After calling publishChannel to add the channel to the TvProvider, it calls requestChannelBrowsable to make the channel visible.

Only use this method to publish your first channel as you do not need user permission to make your first channel browsable (i.e. visible on home screen). For additional channels, see the documentations for publishChannel.

Creating a PreviewChannel, you may pass to the builder a url as your logo. In such case, updatePreviewChannel will load the logo over the network. To use your own networking code, override downloadBitmap.

fun publishPreviewProgram(program: PreviewProgram): Long

Adds programs to a preview channel.

fun publishWatchNextProgram(program: WatchNextProgram): Long

Adds a program to the Watch Next channel

fun updatePreviewChannel(channelId: Long, update: PreviewChannel): Unit

To update a preview channel, you need to use the PreviewChannel.Builder to set the attributes you wish to change. Then simply pass in the built channel and the channelId of the preview channel. (The channelId is the ID you received when you originally published the preview channel.)

Creating a PreviewChannel, you may pass to the builder a url as your logo. In such case, updatePreviewChannel will load the logo over the network. To use your own networking code, override downloadBitmap.

fun updatePreviewProgram(programId: Long, update: PreviewProgram): Unit

Updates programs in a preview channel.

fun updateWatchNextProgram(upgrade: WatchNextProgram, programId: Long): Unit

Updates a WatchNext program.

protected fun downloadBitmap(logoUri: Uri): Bitmap!

Downloads a Bitmap from a remote server. It is declared protected to allow you to override it to use your own networking implementation if you so wish.