How do I add BarcodeFragment in code?

Question

I want to use this lib: https://code.google.com/p/barcodefraglibv2/

But I can't figure out how to add BarcodeFragment in code. Here's a sample:

public class MainActivity extends Activity implements IScanResultHandler{
        BarcodeFragment fragment;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            fragment = new BarcodeFragment();
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            ft.add(R.id.sample, fragment).commit();
            fragment.setScanResultHandler(this);

        }
    }

But I've got an error here:

ft.add(R.id.sample, fragment).commit();

The method add(int, Fragment) in the type FragmentTransaction is not applicable for the arguments (int, BarcodeFragment)

Thank you.

Answer 1

This is an import problem. Your Activity doesn't use the support library, so FragmentTransaction.add is expecting a Fragment of type android.app.Fragment whereas you are providing a BarcoreFragment which extends android.support.v4.app.Fragment;

You can fix that by changing your MainActivity and make it implement FragmentActivity (see doc here), then fixing your imports and making the following changes :

import android.app.FragmentTransaction;
import android.app.Activity;
MainActivity extends Activity
FragmentTransaction ft = getFragmentManager().beginTransaction();

becomes

import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.FragmentActivity;
MainActivity extends FragmentActivity
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();