I have received complaints from users of my application that audio playback will sometimes stop when the screen is blank. This seems to be a problem on some phones or Android OS versions, but not everyone sees this issue. On checking the documentation I found that the MediaPlayer by default does not hold a wake lock to prevent the CPU from being shut down by the power management system while the MediaPlayer is playing.
I have now added the following call in my application in order to avoid this problem with the playback stopping: MediaPlayer.setWakeMode(this, PowerManager.PARTIAL_WAKE_LOCK); Now that my application is holding a PARTIAL_WAKE_LOCK, my concern is what will happen if the battery runs low? I started to code a BroadcastReceiver for ACTION_BATTERY_LOW in order to release the wake lock and make sure that the player would stop if the battery is low. However when I looked for the correct parameter to pass to the MediaPlayer.setWakeMode() to restore the original behavior (no wake lock) I couldn't find any value to do this. The documented wake lock mode parameters (in order of increasing power consumption) are: PARTIAL_WAKE_LOCK SCREEN_DIM_WAKE_LOCK SCREEN_BRIGHT_WAKE_LOCK FULL_WAKE_LOCK There is no documented value to pass to MediaPlayer.setWakeMode() in order to tell it to stop holding the PARTIAL_WAKE_LOCK There isn't any documentation to indicate if the MediaPlayer is already listening for the ACTION_BATTERY_LOW broadcast itself and taking appropriate action, so I really don't have to worry about this. There isn't any documentation to tell me how to tell the MediaPlayer that it is OK to let the CPU shut down when the battery is low. I would like my application to be a "good power citizen" and would appreciate any help and direction on the correct way to implement this.
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