Android Studio Battery Checker 2-1

BatteryReceiver.java

public class BatteryReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {

        TextView statusLabel = ((MainActivity)context).findViewById(R.id.statusLabel);
        TextView percentageLabel = ((MainActivity)context).findViewById(R.id.percentageLabel);
        ImageView batteryImage = ((MainActivity)context).findViewById(R.id.batteryImage);

        String action = intent.getAction();

        if (action != null && action.equals(Intent.ACTION_BATTERY_CHANGED)) {
            // バッテリー情報を取得
        }
    }
}