Get the remaining battery time available from an Android phone

问题

Is it possible to get the remaining battery time available from an Android phone?

Thanks.

回答1:

You can get battery life with help of broadcast receiver by registering a receiver for action Intent.ACTION_BATTERY_CHANGED. My answer is key only, get information from Android Developers website.

By using the below statement in onReceive() method of BroadcastReceiver with above Intent action, you will get battery level currently available(e.g., 50%, 60%, etc.). But you can't estimate the time remaining, because some apps may consume more power. So i think battery level to time remaining conversion won't give correct result.

battery_level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);

I hope it may help you.

回答2:

There are a few apps (battery widgets and the like) that estimate time remaining before the battery runs out. I'd guess they take current battery level and try to work out current drain based on processor usage, backlight level etc. In my experience they aren't too accurate but in principle if you get the algorithm right it should be possible.

来源：https://stackoverflow.com/questions/8923497/get-the-remaining-battery-time-available-from-an-android-phone