错误类型不兼容:android.app.FragmentManager 无法转换为 android.support.v4.app.FragmentManager
Error incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager
错误 Error incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager
快把我逼疯了。
在我的应用程序中,我在 MainActivity 中创建了 3 个导航抽屉项目,timesheet
、claim
和 view
。现在我想在 view
项中添加两个 tabs
和 swipe view
。
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:
Error:(49, 81) error: incompatible types: android.app.FragmentManager
cannot be converted to android.support.v4.app.FragmentManager
如果将 TabsFragmentPagerAdapter
中的 import android.support.v4.app.FragmentManager;
更改为 import android.app.FragmentManager;
,第一个问题就解决了,但得到这个 Error:(12, 15) error: incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager
...我不知道如何解决 ..
已编辑
MainActivity
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
Error:(148, 30) error: incompatible types: ViewView cannot be
converted to Fragment Error:(156, 69) error: incompatible types:
android.app.FragmentManager cannot be converted to
android.support.v4.app.FragmentManager Error:(157, 80) error:
incompatible types: android.app.Fragment cannot be converted to
android.support.v4.app.Fragment
改变
import android.app.Fragment;
import android.app.FragmentManager;
到
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
在每个 class 中。您遇到问题是因为在您的 Fragment 创建 class 中,您使用的是支持 v4 片段,而在您的 MainActivity class 中,您膨胀成一个简单的片段。
您还需要将 getFragmentManager()
更改为 getSupportFragmentManager()
,并确保它们扩展 FragmentActivity
class.
希望对您有所帮助。
错误 Error incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager
快把我逼疯了。
在我的应用程序中,我在 MainActivity 中创建了 3 个导航抽屉项目,timesheet
、claim
和 view
。现在我想在 view
项中添加两个 tabs
和 swipe view
。
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:
Error:(49, 81) error: incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager
如果将 TabsFragmentPagerAdapter
中的 import android.support.v4.app.FragmentManager;
更改为 import android.app.FragmentManager;
,第一个问题就解决了,但得到这个 Error:(12, 15) error: incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager
...我不知道如何解决 ..
已编辑
MainActivity
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
Error:(148, 30) error: incompatible types: ViewView cannot be converted to Fragment Error:(156, 69) error: incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager Error:(157, 80) error: incompatible types: android.app.Fragment cannot be converted to android.support.v4.app.Fragment
改变
import android.app.Fragment;
import android.app.FragmentManager;
到
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
在每个 class 中。您遇到问题是因为在您的 Fragment 创建 class 中,您使用的是支持 v4 片段,而在您的 MainActivity class 中,您膨胀成一个简单的片段。
您还需要将 getFragmentManager()
更改为 getSupportFragmentManager()
,并确保它们扩展 FragmentActivity
class.
希望对您有所帮助。