問題描述
錯誤 錯誤不兼容類型:android.app.FragmentManager 無法轉換為 android.support.v4.app.FragmentManager 讓我抓狂.
在我的應用程序中，我在 MainActivity 中創建了 3 個導航抽屜項，timesheet、claim 和 view.現在我想在 view 項中添加兩個 tabs 和 swipe view.
MainActivity//用于導航抽屜
導入android.app.Fragment；導入android.app.FragmentManager；私人無效selectItem(int位置){片段片段 = null;開關(位置){案例0:片段=新的時間表()；休息;情況1:片段=新索賠1()；休息;案例2:片段=新視圖視圖()；休息;默認:休息;}TabsFragmentPagerAdapter.java
導入android.support.v4.app.Fragment；導入 android.support.v4.app.FragmentManager；導入 android.support.v4.app.FragmentPagerAdapter；公共類 TabsFragmentPagerAdapter 擴展 FragmentPagerAdapter {公共 TabsFragmentPagerAdapter(FragmentManager fm) {超級(調頻)；//TODO 自動生成的構造函數存根}@覆蓋公共片段getItem(int index){//TODO 自動生成的方法存根開關(索引){案例0:返回新的 UpdatePage2();情況1:返回新收據()；}返回空值；}@覆蓋公共 int getCount() {//TODO 自動生成的方法存根返回 2；}}ViewView.java
導入android.app.Fragment；導入 android.content.DialogInterface；導入android.content.Intent；導入android.database.sqlite.SQLiteDatabase；導入android.os.Bundle；導入android.app.FragmentTransaction；導入 android.support.v4.view.ViewPager；導入android.app.ActionBar；導入 android.support.v4.widget.SimpleCursorAdapter；導入 android.support.v7.app.AlertDialog；導入 android.view.LayoutInflater；導入 android.view.Menu；導入android.view.View；導入android.view.ViewGroup；導入 android.widget.AdapterView；導入 android.widget.ListView；導入 com.example.project.project.database.MyDatabaseHelper；公共類 ViewView 擴展片段實現 ActionBar.TabListener {InfoAPI sqlcon;私有 SimpleCursorAdapter 數據適配器；私有 SQLiteDatabase 數據庫；私有 MyDatabaseHelper dbHelper；私有 ListView 列表視圖；私人 ViewPager viewPager;私有 TabsFragmentPagerAdapter mAdapter；私有ActionBar actionBar；private String[] tabs = {"信息", "收據"};public View onCreateView(LayoutInflater inflater, ViewGroup 容器, Bundle savedInstanceState) {super.onCreate(savedInstanceState);查看 View1 = inflater.inflate(R.layout.viewview1, 容器, 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());//這里是錯誤viewPager.setAdapter(mAdapter);actionBar = getActivity().getActionBar();actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);對于 (int i = 0; i < 2; i++) {actionBar.addTab(actionBar.newTab().setText(tabs[i]).setTabListener(this));}viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {@覆蓋公共無效 onPageSelected(int arg){//TODO 自動生成的方法存根actionBar.setSelectedNavigationItem(arg);}@覆蓋公共無效 onPageScrolled(int arg0，float arg1，int arg2){//TODO 自動生成的方法存根}@覆蓋公共無效 onPageScrollStateChanged(int arg0){//TODO 自動生成的方法存根}});構建列表()；返回視圖1；}問題:
<塊引用>錯誤:(49, 81) 錯誤:不兼容的類型:android.app.FragmentManager無法轉成android.support.v4.app.FragmentManager
如果將TabsFragmentPagerAdapter中的import android.support.v4.app.FragmentManager;改為import android.app.FragmentManager;，第一個問題解決但得到這個 Error:(12, 15) error: incompatible types: android.app.FragmentManager cannot be convert to android.support.v4.app.FragmentManager...我不知道怎么做修復..
編輯
MainActivity
導入android.app.Fragment；導入 android.support.v4.app.FragmentManager；案例2:片段=新視圖視圖()；休息;默認:休息;}如果(片段！= null){FragmentManager fragmentManager = getFragmentManager();fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();mDrawerList.setItemChecked(位置，真);mDrawerList.setSelection(位置);setTitle(mNavigationDrawerItemTitles[位置]);mDrawerLayout.closeDrawer(mDrawerList);} 別的 {Log.e("MainActivity", "創建片段時出錯");}}錯誤
<塊引用>Error:(148, 30) 錯誤:不兼容的類型:ViewView 不能轉換為片段錯誤:(156, 69) 錯誤:不兼容的類型:android.app.FragmentManager 無法轉換為android.support.v4.app.FragmentManager 錯誤:(157, 80) 錯誤:不兼容的類型:android.app.Fragment 無法轉換為android.support.v4.app.Fragment
改變
導入android.app.Fragment；導入android.app.FragmentManager；到
導入android.support.v4.app.Fragment；導入 android.support.v4.app.FragmentManager；在每個班級.您正面臨問題，因為在您的 Fragment 創建類中您使用支持 v4 片段，而在您的 MainActivity 類中您正在膨脹為一個簡單的片段.
您還需要將 getFragmentManager() 更改為 getSupportFragmentManager()，并確保它們擴展了 FragmentActivity 類.p>
希望對你有所幫助.
Error Error incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager is drving me nuts.
In my app, I have 3 navigation drawer item, timesheet,claim and view, created in MainActivity. Now I wanted to add two tabs with swipe view in view item.
MainActivity // for navigation drawer
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;
}
Problem :
Error:(49, 81) error: incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager
If changed import android.support.v4.app.FragmentManager; in TabsFragmentPagerAdapter to import android.app.FragmentManager;, the first issue solve but get this Error:(12, 15) error: incompatible types: android.app.FragmentManager cannot be converted to android.support.v4.app.FragmentManager...I have no idea how to fix ..
Edited
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");
}
}
Error
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
Change
import android.app.Fragment;
import android.app.FragmentManager;
to
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
in every class. you are facing problems because in your Fragment creation class you are using support v4 fragment and in your MainActivity class you are inflating as a simple fragment.
You also need to change getFragmentManager() to getSupportFragmentManager(), and make sure they're extending a FragmentActivity class.
Hope it will help you.
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