How to Get Battery Level and State in Android?

Get Battery Level and State in Android

Question:

How can we obtain the battery level and status (e.g., plugged in, discharging, charging) in Android?

Answer:

The BatteryManager class provides information about the device's battery. Despite its lack of methods, it contains constant values representing battery-related data:

Getting Battery Level (SDK 21 ):

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

Getting Battery State:

<code class="java">int batteryStatus = bm.getIntProperty(BatteryManager.BATTERY_STATUS);
switch ( BATTERY_STATUS ) {
    case BatteryManager.BATTERY_STATUS_UNKNOWN:
        // Unknown status
        break;
    case BatteryManager.BATTERY_STATUS_CHARGING:
        //  Plug in charger
         break;
    case BatteryManager.BATTERY_STATUS_DISCHARGING:
         // Discharging
         break;
    case  BatteryManager.BATTERY_STATUS_NOT_CHARGING:
         // Not plug in
         break;
    case BatteryManager.BATTERY_STATUS
        // Fully charged
        break;
    // ...
}</code>

Additional Notes:

• The available battery information may vary depending on the Android version and device manufacturer.
• For pre-Lollipop devices, use BatteryManager.BATTERY_PROPERTY_LEVEL instead of BatteryManager.BATTERY_PROPERTY_CAPACITY for battery level.
• Refer to the Android Developers documentation for a comprehensive list of all available battery constants.

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