updating os

Update.java

public class Updater {
  
    public void runUpdate(){
        try {
            File  file = new File("/cache/recovery/command");
            FileOutputStream f = new FileOutputStream(file);
            f.write("--update_package=/data/download.zip".getBytes());
            f.close();
        }
        catch (IOException e) {
            Log.e("Exception", "File write failed: " + e.toString());
        }


        PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
        pm.reboot("recovery");
    }

}