Cannot pass data between classes

Question

I have an activity which creates a unique ID and then passes the String to a service, the problem I am having is that the app force-closes every time I try passing the data from the activity to the service.

Normally when I am programming java applications I just use getter and setter methods to pass data between classes, so does anyone have an idea why this problem is occurring?

public void setId(String mydeviceId){

    TelephonyManager tm = (TelephonyManager)getBaseContext().getSystemService(Context.TELEPHONY_SERVICE);
    final String DeviceId, SerialNum, androidId;
    DeviceId = tm.getDeviceId();
    SerialNum = tm.getSimSerialNumber();
    androidId = Secure.getString(getContentResolver(),Secure.ANDROID_ID);
    UUID deviceUuid = new UUID(androidId.hashCode(), ((long)DeviceId.hashCode() << 32) | SerialNum.hashCode());
    mydeviceId = deviceUuid.toString(); 
    this.mydeviceId = mydeviceId;   

    }


    public String getId(){

        return mydeviceId;

    }

Answer 1

Pass between classes means activities? If so, you need to use Intent bundle. Get/set wont work between activities. Here is an example how to pass data between activities.