Make a actionbar with swipe views?

Question

I'm pretty much a newbie when it comes to coding in android and I wonder how you can make a actionbar with swipe views.

My code: http://pastebin.com/iHZn27H3

Errors

Unknown entity 'ViewPager' on line 11
Unknown entity 'ViewPager' on line 21
Unknown type of field 'mViewPager' on line 21
Unknown type of field 'mViewPager' on line 22
Unknown method on line 22
Unknown entity 'ViewPager' on line 23
Unknown type of field 'mViewPager' on line 34
Unknown mrthod on line 34

How do I fix those errors?

EDIT: Errors now gone but I can't switch tab my swiping, only by clicking. Code: http://pastebin.com/iHZn27H3

Answer 1

• Answer to the first sub-question:

I do not know which IDE you are using, but in Intellij you have to go to 'Module Settings' > 'Libraries' > click on plus sign > Java > libs (folder) > android-support-v4.jar. In Eclipse, probably, you have to go to 'Build Path' > 'Config Build Path' > 'Java Build Path' > 'Add JARs' > 'libs' > android-support-v4.jar

---

• Answer to the second sub-question:

Extending http://thepseudocoder.wordpress.com/2011/10/05/android-page-swiping-using-viewpager/ as an example:

Tab1Fragment.java:

public class Tab1Fragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.live, container,false);
        TextView tv = (TextView) view.findViewById(R.id.status);
        tv.setText("Fragment1");

        return view;
    }
}

Tab2Fragment.java:

public class Fragment2 extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.live, container,false);
        TextView tv = (TextView) view.findViewById(R.id.status);
        tv.setText("Fragment2");

        return view;
    }
}

live.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">
    <TextView android:layout_height="fill_parent"
              android:layout_width="fill_parent"
              android:id="@+id/status"/>
</LinearLayout>

main activity (ViewPagerFragmentActivity.java):

public class ViewPagerFragmentActivity extends FragmentActivity {
    private PagerAdapter mPagerAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       super.setContentView(R.layout.activity_main);
       //initialsie the pager
       this.initialisePaging();
    }

    private void initialisePaging() {
        List<Fragment> fragments = new Vector<Fragment>();
        fragments.add(Fragment.instantiate(this, Fragment1.class.getName()));
        fragments.add(Fragment.instantiate(this, Fragment2.class.getName()));
        this.mPagerAdapter  = new PagerAdapter(super.getSupportFragmentManager(), fragments);
        ViewPager pager = (ViewPager)super.findViewById(R.id.viewpager);
        pager.setAdapter(this.mPagerAdapter);
    }
}

main_activity.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

  <android.support.v4.view.ViewPager
    android:id="@+android:id/viewpager"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"></android.support.v4.view.ViewPager>

</LinearLayout>

PagerAdapter.java:

public class PagerAdapter extends FragmentPagerAdapter {
private List<Fragment> fragments;

public PagerAdapter(FragmentManager fm, List<Fragment> fragments) {
    super(fm);
    this.fragments = fragments;
}

@Override
public Fragment getItem(int position) {
    return this.fragments.get(position);
}

@Override
public int getCount() {
    return this.fragments.size();
}
}