Useful extension functions for Andorid

AndroidExt.kt

/**
 * Extension function on [Context] to get current battery level
 */
fun Context.getBatteryLevel(): Float? {
    val batteryStatus: Intent? = registerReceiver(null, IntentFilter(Intent.ACTION_BATTERY_CHANGED))
    batteryStatus?.let { intent ->
        val level: Int = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1)
        val scale: Int = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1)
        return level * 100 / scale.toFloat()
    }
    return null
}

/**
 * Check whether power saving mode is enabled or not
 */
fun Context.isPowerSaveModeEnabled(): Boolean {
    (getSystemService() as PowerManager?)?.let {
        return it.isPowerSaveMode
    }
    return false
}