How to calculate remaining time of android phone battery? [duplicate]

Answer 1

The following code will help you to calculate battery level

public int getBatteryLevel(Context context) {
    IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
    Intent batteryStatus = context.registerReceiver(null, ifilter);
    int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
    return level;
}