在 Android 8.0 之前的 Android TV 平台上,所有推薦內容都會在同一處顯示
一律在畫面上顯示的建議列。瞭解如何建立
首頁的建議資料列
。
如要在所有 Android TV 版本上顯示推薦內容,您的應用程式
都應實作這兩種推薦 API測試目前的系統 API 級別並
使用適當的 API 建構推薦列或頻道。
Kotlin
if(android.os.Build.VERSION.SDK_INT>=Build.VERSION_CODES.O){// Use the home screen recommendation channels API}else{// Use the recommendations row API}
Java
if(android.os.Build.VERSION.SDK_INT>=Build.VERSION_CODES.O){// Use the home screen recommendation channels API}else{// Use the recommendations row API}
[null,null,["上次更新時間:2025-07-27 (世界標準時間)。"],[],[],null,["# Recommend content on the home screen\n\nThe Android TV *home screen* displays recommended content using *channels* and\n*programs*. Channels are displayed as individual rows on the home screen, with\ncards that display all of the available programs for that channel.\n\nYour app should have at least one channel. The first channel your\napp creates becomes its [default channel](/training/tv/discovery/recommendations-channel#default-channel),\nand Android TV displays that channel automatically on the home screen. Your app\ncan offer other channels, but the user must select and approve those channels\nbefore they are added to the home screen.\n\nIf your app features TV shows, movies, or other video content, we recommend that\nyou support [video previews](/training/tv/discovery/preview-videos) and\nintegrate with the [Watch Next channel](/training/tv/discovery/recommendations-channel#watch-next).\nThe Watch Next channel is controlled by the Android system. Your app can add\nuser-related programs to this channel, such as programs that the user marked as\ninteresting, stopped watching in the middle, or that are related to the content\nthe user is watching (like the next episode in a series or next season of a\nshow).\n\nEnsure compatibility\n--------------------\n\nThe home screen displays recommendations two different ways depending on the\nversion of Android:\n\n- In Android 8.0 (API level 26) and later, apps can show recommendations in one or more channels that appear on separate rows. One channel (the default channel) always appears. The user can discover and add the other channels to their home screen. Learn how to create [recommendation channels](/training/tv/discovery/recommendations-channel) on the home screen.\n- Before Android 8.0, Android TV shows all recommendations in a single recommendations row that always appears on the screen. Learn how to create the [recommendation row](/training/tv/discovery/recommendations-row) on the home screen.\n\nTo be able to show recommendations on all versions of Android TV, your app\nshould implement both recommendation APIs. Test the current system API level and\nuse the appropriate API to build the recommendation row or channels. \n\n### Kotlin\n\n```kotlin\nif (android.os.Build.VERSION.SDK_INT \u003e= Build.VERSION_CODES.O) {\n // Use the home screen recommendation channels API\n} else {\n // Use the recommendations row API\n}\n```\n\n### Java\n\n```java\nif (android.os.Build.VERSION.SDK_INT \u003e= Build.VERSION_CODES.O) {\n // Use the home screen recommendation channels API\n} else {\n // Use the recommendations row API\n}\n```\n\nIf your app was compiled using API level 25 or earlier, it can still run on\nAndroid TV in level 26. The old recommendations behavior is forward-compatible,\nbut constrained:\n\n- The recommendations row is automatically converted and appears as a new channel on the home screen.\n- The programs on the converted channel respond to updates from your [recommendation service](/training/tv/discovery/recommendations-row#service), but the user cannot use the TV's UI to manipulate the programs on the channel (add/remove programs, copy programs to the Watch Next channel).\n- If you update the app to API level 26, the converted channel still appears on TVs running API 26. The TV removes the converted channel from the screen the first time your app displays a channel created with the new API. This happens immediately if the app creates a [default channel](/training/tv/discovery/recommendations-channel#the_default_channel), or later when the user selects and adds any other channel created by your app.\n\n| **Note:** This forward-compatible behavior is temporary, it will be removed sometime in the future. To ensure compatibility, the best practice is to implement both APIs, as described above."]]