android– 从活动调用getSupportFragmentManager()时出错

概述我正在尝试使用片段实现滑动视图.但是对我来说,扩展简单的活动而非片段活动非常重要.我在下面编写的代码中的getSupportFragmentManager()上收到错误：publicclassCollectionDemoActivityextendsActivity{DemoCollectionPagerAdaptermDemoCollectionPagerAdapter;ViewPa

我正在尝试使用片段实现滑动视图.
但是对我来说,扩展简单的活动而非片段活动非常重要.
我在下面编写的代码中的getSupportFragmentManager()上收到错误：

public class CollectionDemoActivity extends Activity {DemoCollectionPagerAdapter mDemoCollectionPagerAdapter;VIEwPager mVIEwPager;public voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_collection_demo);    mDemoCollectionPagerAdapter = new DemoCollectionPagerAdapter(getSupportFragmentManager());    mVIEwPager = (VIEwPager) findVIEwByID(R.ID.pager);    mVIEwPager.setAdapter(mDemoCollectionPagerAdapter);}public static class DemoCollectionPagerAdapter extends FragmentStatePagerAdapter {    public DemoCollectionPagerAdapter(FragmentManager fm) {        super(fm);        //int x=10;    }    @OverrIDe    public Fragment getItem(int i) {        Fragment fragment = new DemoObjectFragment();        Bundle args = new Bundle();        args.putInt(DemoObjectFragment.ARG_OBJECT, i + 10);         fragment.setArguments(args);        return fragment;    }    @OverrIDe    public int getCount() {        // For this contrived example, we have a 100-object collection.        return 100;    }    @OverrIDe    public CharSequence getPageTitle(int position) {        return "OBJECT " + (position + 1);    }}public static class DemoObjectFragment extends Fragment {    public static final String ARG_OBJECT = "object";    @OverrIDe    public VIEw onCreateVIEw(LayoutInflater inflater, VIEwGroup container,            Bundle savedInstanceState) {        VIEw rootVIEw = inflater.inflate(R.layout.fragment_collection_object, container, false);        Bundle args = getArguments();        ((TextVIEw) rootVIEw.findVIEwByID(androID.R.ID.text1)).setText(                Integer.toString(args.getInt(ARG_OBJECT)));        return rootVIEw;    }}}

解决方法:

该错误非常明显. getSupportFragmentManager()仅为FragmentActivity类定义.无论您想要或需要多少调用该方法,对于普通活动而言根本不存在.

另见：Difference between Activity and FragmentActivity和Difference between Fragment and FragmentActivity

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