How to Retrieve Battery Level and State Information in Android?

Accessing Battery Information in Android

Question: How to obtain the battery's level and state (e.g., plugged in, discharging, charging) in Android?

Answer:

Android provides the BatteryManager class to manage battery-related information. Contrary to its name, it does not contain any methods but defines constants that represent different battery states and properties.

Usage:

Since Android SDK 21 (Lollipop), you can use the following code to retrieve the current battery level as a percentage:

<code class="java">BatteryManager bm = (BatteryManager) context.getSystemService(BATTERY_SERVICE);
int batLevel = bm.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY);</code>

This code snippet fetches the battery level from the BatteryManager, which is accessible via the BATTERY_SERVICE system service. Note that context represents the current application context.

Additional Information:

• Other useful constants defined in BatteryManager include:

  • BatteryManager.BATTERY_PLUGGED_AC (AC charger)
  • BatteryManager.BATTERY_PLUGGED_USB (USB charger)
  • BatteryManager.BATTERY_HEALTH_GOOD
  • BatteryManager.BATTERY_STATE_CHARGING
• Consult the Android Developers documentation for more details on BatteryManager and battery management in Android: [Read BatteryManager | Android Developers - BATTERY_PROPERTY_CAPACITY](https://developer.android.com/reference/android/os/BatteryManager#BATTERY_PROPERTY_CAPACITY)

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