MainTabActivity.java

package io.evercam.connect;

import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;

/**
 * MainTabActivity
 * <p/>
 * Tab page, switch between manual and UPnP port forwarding page.
 */

public class MainTabActivity extends FragmentActivity
{
    private static final String STATE_SELECTED_NAVIGATION_ITEM = "selected_navigation_item";

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_tab);

        final ActionBar actionBar = getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        actionBar.setDisplayShowTitleEnabled(false);
        actionBar.setDisplayShowHomeEnabled(false);
        actionBar.addTab(actionBar.newTab().setText(R.string.titleManualForward).setTabListener
                (new TabListener<ManuallyForwardingTab>(this, "tabtwo", ManuallyForwardingTab
                        .class)));
        actionBar.addTab(actionBar.newTab().setText(R.string.titleUpnpForward).setTabListener(new
                TabListener<UpnpForwardingTab>(this, "tabone", UpnpForwardingTab.class)));

    }

    @Override
    public void onRestoreInstanceState(Bundle savedInstanceState)
    {
        if(savedInstanceState.containsKey(STATE_SELECTED_NAVIGATION_ITEM))
        {
            getActionBar().setSelectedNavigationItem(savedInstanceState.getInt
                    (STATE_SELECTED_NAVIGATION_ITEM));
        }
    }

    @Override
    public void onSaveInstanceState(Bundle outState)
    {
        outState.putInt(STATE_SELECTED_NAVIGATION_ITEM, getActionBar().getSelectedNavigationIndex
                ());
    }

    public class TabListener<T extends Fragment> implements ActionBar.TabListener
    {
        private Fragment mFragment;
        private final Activity mActivity;
        private final Class<T> mClass;
        String mTag;

        public TabListener(Activity activity, String tag, Class<T> clz)
        {
            mActivity = activity;
            mTag = tag;
            mClass = clz;
        }

        @Override
        public void onTabSelected(Tab tab, FragmentTransaction ft)
        {
            mFragment = Fragment.instantiate(mActivity, mClass.getName());
            getSupportFragmentManager().beginTransaction().replace(R.id.containter, mFragment)
                    .commit();
        }

        @Override
        public void onTabUnselected(Tab tab, FragmentTransaction ft)
        {
        }

        @Override
        public void onTabReselected(Tab tab, FragmentTransaction ft)
        {
        }
    }
}