相关疑难解决方法(0)

我有一个浏览片段的viewpager.我的FragmentPagerAdapter子类在getItem方法中创建了一个看似浪费的新片段.是否有一个FragmentPagerAdapter相当于convertView在listAdapter,使我重新使用已创建的片段？我的代码如下.

public class ProfilePagerAdapter extends FragmentPagerAdapter {

    ArrayList<Profile> mProfiles = new ArrayList<Profile>();

    public ProfilePagerAdapter(FragmentManager fm) {
        super(fm);
    }

    /**
     * Adding a new profile object created a new page in the pager this adapter is set to.
     * @param profile
     */
    public void addProfile(Profile profile){
        mProfiles.add(profile);
    }

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

    @Override
    public Fragment getItem(int position) {
        return new ProfileFragment(mProfiles.get(position));
    }
}

我有一个主要活动,它将从url异步中获取JSON数据

这是MainActivity.java

public class MainActivity extends FragmentActivity implements ActionBar.TabListener{
    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;

    //Tab titles
    private String[] tabs = {"Sermons", "More"};
    private String[] sermonsList = new String[0];

    //JSON URL for sermonList data
    private static String sermonListJSONUrl = "https://dl.dropboxusercontent.com/u/12345/index.php";

    //Variable to save JSON Object
    private static final String JSON_KEY_SERMONS = "sermon";

    private JSONObject sermonListJSONObject = null;
    private JSONArray sermonListJSONArray = null;
    SermonsFragment mSermonFragment;

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

        //Call JSONParser Asynchronously to get …