@Override
public Object instantiateItem(final ViewGroup container,final int position)
{
    final LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    int resId = 0;
    switch (position)
        {
        case 0:
            resId = R.layout.favorites_fragment;
            break;
        case 1:
            resId = R.layout.nearby_list_fragment;
            break;
        default:
            throw new IllegalArgumentException("Index cant be mapped to fragement:" + position);
        }

    final View view = inflater.inflate(resId,null);

    viewPager.addView(view,0);

    return view;
}

因为我想使用片段我已经混淆了我的这个方法作为所有例子我可以找到膨胀视图而不是在那里创建片段.这该怎么做 ？

PS：我正在使用ActionBarSherlock lib 4.1 …

谢谢,
延

它必须是简单的东西.
我正在展示大部分代码.错误在下一节中.

public class MainActivity extends FragmentActivity implements
    ActionBar.TabListener {

public static final int TAB_COUNT = 3;
public static InputMethodManager inputManager;

SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;

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

    mSectionsPagerAdapter = new SectionsPagerAdapter(
            getSupportFragmentManager());

    // Set up the action bar.
    final ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    // When swiping between different sections,select the corresponding
    // tab.
    mViewPager
            .setonPagechangelistener(new ViewPager.SimpleOnPagechangelistener() {
                @Override
                public void onPageSelected(int position) {
                    actionBar.setSelectednavigationItem(position);
                }
            });

    // For each of the sections in the app,add a tab to the action bar.
    for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {

        actionBar.addTab(actionBar.newTab()
                .setText(mSectionsPagerAdapter.getPageTitle(i))
                .setTabListener(this));
    }

    // To control keyboard pop-up
    inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);

}
    @Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main,menu);
    return true;
}

@Override
public void onTabUnselected(ActionBar.Tab tab,FragmentTransaction fragmentTransaction) {
}

@Override
public void onTabSelected(ActionBar.Tab tab,FragmentTransaction fragmentTransaction) {
    // When the given tab is selected,switch to the corresponding page in
    // the ViewPager.
    mViewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabReselected(ActionBar.Tab tab,FragmentTransaction fragmentTransaction) {
}

这是我的错误所在.
getItem的case 1,Type mismatch：无法从MainActivity.HistoryFragment转换为Fragment.它告诉我要么将方法返回类型更改为HistoryFragment,要么将newInstance()的返回类型更改为Fragment.哪里我也做不到.我见过的其他例子与我的代码几乎相同.我曾经尝试过,不经过论证.

public class SectionsPagerAdapter extends FragmentPagerAdapter {

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

    @Override
    public Fragment getItem(int i) {
        switch (i) {
        case 0:
            Fragment tipCalc = new TipCalcFragment();
            return tipCalc;
        case 1:
            // Fragment history = new HistoryFragment();
            return HistoryFragment.newInstance(i); //ERROR HERE
        case 2:
            Fragment stats = new StatsFragment();
            return stats;
        }
        return null;
    }

我的HistoryFragment扩展了ListFragment.最后,它不会从String []值中提取,而是从数据库资源中提取.我只是想先设置一个结构,然后看看/播放布局.

public static class HistoryFragment extends ListFragment {
    // public HistoryFragment() {
    // }

    String[] values = new String[] { ... };

    static HistoryFragment newInstance(int num) {
        HistoryFragment history = new HistoryFragment();

        Bundle args = new Bundle();
        args.putInt("num",num);

        history.setArguments(args);

        return history;
    }

    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.history,container,false);

        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setlistadapter(new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,android.R.id.text1,values));
    }
}