当我旋转设备然后将其旋转回来时我得到一个例外，说我的导航抽屉碎片没有创建视图
Caused by: java.lang.IllegalStateException: Fragment xxx.xxx.Fragments.NavigationDrawerFragment did not create a view.
at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2200)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:300)
at android.support.v7.app.AppCompatDelegateImplV7.callActivityOnCreateView(AppCompatDelegateImplV7.java:816)
at android.support.v7.app.AppCompatDelegateImplV11.callActivityOnCreateView(AppCompatDelegateImplV11.java:72)
at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:804)
at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:684)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
at xxx.xxxxx.MainActivity.onCreate(MainActivity.java:198)
at android.app.Activity.performCreate(Activity.java:5248)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1110)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3805)
at android.app.ActivityThread.access$900(ActivityThread.java:139)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1216)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5086)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)
这是我的活动布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar android:layout_height="wrap_content"
android:layout_width="match_parent"
android:id="@+id/toolbar"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
</android.support.v7.widget.Toolbar>
<View android:layout_width="match_parent"
android:layout_height="3dp"
android:background="@drawable/toolbar_shadow"/>
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<fragment android:id="@+id/navigation_drawer"
android:layout_width="@dimen/navigation_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
android:name="xxx.xxxx.Fragments.NavigationDrawerFragment" />
</android.support.v4.widget.DrawerLayout>
</RelativeLayout>
这是我的一些MainActivity代码
@Override
public void onCreate(Bundle state){
super.onCreate(state);
setContentView(R.layout.main);
mToolbar = (Toolbar)findViewById(R.id.toolbar);
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ListFragment lf = new ListFragment();
ft.replace(R.id.container, lf).commit();
mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
// Set up the drawer.
mNavigationDrawerFragment.setUp(R.id.navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), mToolbar);
}
我可以旋转一次就好了但是当我再次旋转时它就会崩溃。我看了这个问题的其他问题，但似乎没有一个问题跟着我的问题
编辑：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
mHeader = inflater.inflate(R.layout.header_view,null);
mDrawerListView = (ListView)v.findViewById(R.id.list);
mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(position > 0){
selectItem(position);
}else{
if (mDrawerListView != null) {
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
}
}
}
});
mDrawerListView.addHeaderView(mHeader);
mDrawerListView.setAdapter(new NavDrawerAdapter(
getActivity(),
R.layout.drawer_row_layout,
R.id.text1,
getResources().getStringArray(R.array.menu_list)));
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
return v;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout,Toolbar toolbar) {
mFragmentContainerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
mDrawerToggle = new ActionBarDrawerToggle(
getActivity(), /* host Activity */
mDrawerLayout, /* DrawerLayout object */
toolbar,
R.string.navigation_drawer_open, /* "open drawer" description for accessibility */
R.string.navigation_drawer_close /* "close drawer" description for accessibility */
) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
//getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
if (!mUserLearnedDrawer) {
mUserLearnedDrawer = true;
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(getActivity());
sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
//getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerSlide(View drawerView, float slideOffset){
super.onDrawerSlide(drawerView, slideOffset);
}
};
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
答案 0 :(得分：0)
我不确定为什么这会解决这里的问题，但我所做的不是在xml中创建片段而是我像这样动态创建它
if(!(getSupportFragmentManager().findFragmentById(R.id.navigation_drawer) instanceof NavigationDrawerFragment)){
mNavigationDrawerFragment = new NavigationDrawerFragment();
ft.replace(R.id.navigation_drawer,mNavigationDrawerFragment).commit();
}else{
ft.commit();
}
奇怪的是我有另一个项目，它在xml中声明了app抽屉，我可以将它旋转得很好