pflammertsma

/* Copyright 2021 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */

val params: WindowManager.LayoutParams = window.attributes
if (requestedMode.modeId !== params.preferredDisplayModeId) {
    params.preferredDisplayModeId = requestedMode.modeId
    window.attributes = params
}

pflammertsma

/* Copyright 2021 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */

// Determine whether the transition will be seamless.
// Non-seamless transitions may cause a 1-2 second black screen.
val refreshRates = display?.mode?.alternativeRefreshRates
val willBeSeamless = Arrays.asList<FloatArray>(refreshRates).contains(newRefreshRate)
if (willBeSeamless) {
    // Set the frame rate, but only if the transition will be seamless.
    surface.setFrameRate(newRefreshRate,

pflammertsma

/* Copyright 2021 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */
implementation 'androidx.draganddrop:draganddrop:1.0.0-alpha02'

pflammertsma

/* Copyright 2021 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */
DropHelper.configureView(
    // Activity that will handle the drop
    this,
    // Target drop view to be highlighted
    outerDropTarget,
    // Supported MIME types
    arrayOf(MIMETYPE_TEXT_PLAIN, "image/*"),
    // Options for configuring drop targets

pflammertsma

/* Copyright 2021 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */
// Make a view draggable to share a file. DragStartHelper takes care of
// intercepting drag gestures and attaching the listener.
DragStartHelper(draggableView) { view, _ ->
    // Sets the appropriate MIME types automatically.
    val dragClipData = ClipData.newUri(contentResolver, "File", fileUri)

    // Set the visual look of the dragged object.
    // Can be extended and customized; we use the default here.

pflammertsma

setHeaderPresenterSelector(object : PresenterSelector() {
    override fun getPresenter(item: Any?) = IconHeaderItemPresenter()
})

pflammertsma

override fun onBindViewHolder(viewHolder: Presenter.ViewHolder, item: Any) {
    val headerItem = (item as ListRow).headerItem
    viewHolder.view.apply {
        (findViewById<View>(R.id.header_icon) as ImageView).apply {
            val drawableResId = when (headerItem.id) {
                ID_POPULAR -> R.drawable.ic_popular
                ID_EDITOR_PICKS -> R.drawable.ic_editor_picks
                ...
            }
            setImageDrawable(resources.getDrawable(drawableResId, null))

pflammertsma

<androidx.leanback.widget.NonOverlappingLinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/header_icon"
        android:layout_width="32dp"
        android:layout_height="32dp"

pflammertsma

class IconHeaderItemPresenter : RowHeaderPresenter() {

    override fun onCreateViewHolder(viewGroup: ViewGroup): ViewHolder {
        // inflate layout
    }

    override fun onBindViewHolder(viewHolder: Presenter.ViewHolder, item: Any) {
        // set text, icons, etc.
    }

pflammertsma

val program = PreviewProgram.Builder()
        .setChannelId(channelId)
        // Matches the intent filter in the manifest for VIEW action
        .setIntentUri(Uri.parse("https://.../program/$id"))
        .build()
helper.publishPreviewProgram(program)