错误不兼容类型：android.app.FragmentManager无法转换为android.support.v4.app.FragmentManager

错误Error incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager正在为我疯狂。

在我的应用程序中，我有3个导航抽屉项目， timesheet ， claim和view ，在MainActivity中创建。 现在我想在view项中添加两个带swipe view tabs 。

MainActivity //用于导航抽屉

  import android.app.Fragment; import android.app.FragmentManager; private void selectItem(int position) { Fragment fragment = null; switch (position) { case 0: fragment=new TimeSheet(); break; case 1: fragment=new Claims1(); break; case 2: fragment=new Viewview(); break; default: break; } 

TabsFragmentPagerAdapter.java

 import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; public class TabsFragmentPagerAdapter extends FragmentPagerAdapter { public TabsFragmentPagerAdapter(FragmentManager fm) { super(fm); // TODO Auto-generated constructor stub } @Override public Fragment getItem(int index) { // TODO Auto-generated method stub switch(index) { case 0: return new UpdatePage2(); case 1: return new Receipt(); } return null; } @Override public int getCount() { // TODO Auto-generated method stub return 2; } } 

ViewView.java

 import android.app.Fragment; import android.content.DialogInterface; import android.content.Intent; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.app.FragmentTransaction; import android.support.v4.view.ViewPager; import android.app.ActionBar; import android.support.v4.widget.SimpleCursorAdapter; import android.support.v7.app.AlertDialog; import android.view.LayoutInflater; import android.view.Menu; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ListView; import com.example.project.project.database.MyDatabaseHelper; public class ViewView extends Fragment implements ActionBar.TabListener { InfoAPI sqlcon; private SimpleCursorAdapter dataAdapter; private SQLiteDatabase database; private MyDatabaseHelper dbHelper; private ListView listView; private ViewPager viewPager; private TabsFragmentPagerAdapter mAdapter; private ActionBar actionBar; private String[] tabs = {"Information", "receipt"}; public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { super.onCreate(savedInstanceState); View View1 = inflater.inflate(R.layout.viewview1, container, false); listView = (ListView) View1.findViewById(R.id.listView1); dbHelper = new MyDatabaseHelper(getActivity()); sqlcon = new InfoAPI(getActivity()); viewPager = (ViewPager) View1.findViewById(R.id.pager); mAdapter = new TabsFragmentPagerAdapter(getActivity().getFragmentManager()); //here the error viewPager.setAdapter(mAdapter); actionBar = getActivity().getActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); for (int i = 0; i < 2; i++) { actionBar.addTab(actionBar.newTab().setText(tabs[i]).setTabListener(this)); } viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageSelected(int arg) { // TODO Auto-generated method stub actionBar.setSelectedNavigationItem(arg); } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } @Override public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } }); BuildList(); return View1; } 

问题：

错误：（49,81）错误：不兼容的类型：android.app.FragmentManager无法转换为android.support.v4.app.FragmentManager

如果更改import android.support.v4.app.FragmentManager; 在TabsFragmentPagerAdapter中import android.app.FragmentManager; ，第一个问题解决但得到这个Error:(12, 15) error: incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager …我不知道如何修复..

编辑

主要活动

 import android.app.Fragment; import android.support.v4.app.FragmentManager; case 2: fragment=new ViewView(); break; default: break; } if (fragment != null) { FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); mDrawerList.setItemChecked(position, true); mDrawerList.setSelection(position); setTitle(mNavigationDrawerItemTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } else { Log.e("MainActivity", "Error in creating fragment"); } } 

错误

错误：（148,30）错误：不兼容类型：ViewView无法转换为Fragment错误：（156,69）错误：不兼容类型：android.app.FragmentManager无法转换为android.support.v4.app.FragmentManager错误： （157,80）错误：不兼容的类型：android.app.Fragment无法转换为android.support.v4.app.Fragment

Answer 1

更改

 import android.app.Fragment; import android.app.FragmentManager; 

至

 import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; 

在每个class级。 你遇到了问题，因为在你的Fragment创建类中你正在使用支持v4片段，而在你的MainActivity类中你正在膨胀为一个简单的片段。

您还需要将getFragmentManager()更改为getSupportFragmentManager() ，并确保它们正在扩展FragmentActivity类。

希望它会对你有所帮助。