Android TV -2.5- Enabling Background Playback

Enabling Background Playback

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This lesson teaches you to

1. Request Background Playback

A user watching content on a TV device may decide to switch to the TV launcher at any time. If a user switches to the launcher while using a TV playback app, by default the app is paused. Since the user did not explicitly request to pause playback, the default behavior might seem abrupt and unexpected. This lesson describes how to enable background playback in your app, which provides a better user experience.

Request Background Playback

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Normally, when the user clicks on Home to display the TV launcher, the activity pauses. However, your app can request background playback, in which the activity continues playing behind the TV launcher.

To request background playback, call requestVisibleBehind(). Be sure to clean up media resources if the activity stops being visible. For example, you should free media resources if requestVisibleBehind() returnsfalse to indicate that the request failed, or if the system calls your override of onVisibleBehindCanceled().

@Overridepublic void onPause() {  super.onPause();  if (mVideoView.isPlaying()) {    // Argument equals true to notify the system that the activity    // wishes to be visible behind other translucent activities    if (! requestVisibleBehind(true)) {      // App-specific method to stop playback and release resources      // because call to requestVisibleBehind(true) failed      stopPlayback();    }  } else {    // Argument equals false because the activity is not playing    requestVisibleBehind(false);  }}@Overridepublic void onVisibleBehindCanceled() {  // App-specific method to stop playback and release resources  stopPlayback();  super.onVisibleBehindCanceled();}

Next class: Helping Users Find Content on TV

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