Android : startActivityForResult out an activity

How to use startActivityForResult outside an activity context say in a regular java class

EX: In the main activity, Im calling method of SampleClass. In this method i have to open the device camera and obtain the image and process it.

The problem is the control is not going to the onActivityResult callback method inside the SampleClass but instead it is going to onActivityResult callback method inside the MainActivity. What am i doing wrong?

I need to be able to handle the image inside Sample Class only. How can i achieve this

Code Snippet

MAIN ACTIVITY:

public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
...
...

    SampleClass sample = new Sample(this);   
    sample.openCamera();
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == 0){
        if(resultCode == RESULT_OK){
            syso("INSIDE MAIN ACTIVITY");
        }

        if(resultCode == RESULT_CANCELED){
            ...
        }
    }
}

}

SAMPLE CLASS:

public class SampleClass extends Activity{

private Context context;

public SampleClass(Context context){
    this.context = context;
}

public void openCamera(){
    Intent photoIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    ((Activity) context).startActivityForResult(photoIntent, 0);
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if(requestCode == 0){
        if(resultCode == RESULT_OK){
            //get the image 
            // process it.

            syso("INSIDE SAMPLE CLASS");
        }

        if(resultCode == RESULT_CANCELED){

        }
    }
}

}

If i run this program, The output on the console is INSIDE MAIN ACTIVITY. What i want is to be able to get INSIDE SAMPLE CLASS as the output.

Thanks and Regards