// Initialize a new BroadcastReceiver instance
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver()
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        // Get the battery scale----
        int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE,-1);
        // get the battery level----
        int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL,-1);
        // Calculate the battery charged percentage
        float percentage = level/ (float) scale;
        //Battery Percentage
        int mProgressStatus = (int)((percentage)*100);
    }
}

// Initialize a new IntentFilter instance
IntentFilter iFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
// Register the broadcast receiver
mContext.registerReceiver(mBroadcastReceiver,iFilter);