我正在开发一个android应用程序。我在片段中使用抽屉。抽屉里有三个菜单。所有工作正常，直到我根据所选菜单在布局中加载片段之前引入密码检查。时间它工作正常，片段为null。当片段不为null时出现问题。当尝试用所选菜单替换现有片段时。当我给出正确的密码时，我得到forceclose。 我正在使用外部课程检查密码，并使用活动结果。 我试着用你的suggetions.help提前帮我。
这是我的班级，
public class TruckInventoryFragment extends SherlockFragment {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
Fragment fragment;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] navMenuTitles;
private TypedArray navMenuIcons;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
int pos;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragmenttab2.xml
View view = inflater.inflate(R.layout.truckinventoryfragment,
container, false);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
mTitle = mDrawerTitle = getActivity().getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
mDrawerLayout = (DrawerLayout) getActivity().findViewById(
R.id.drawer_layout);
mDrawerList = (ListView) getActivity().findViewById(
R.id.list_slidermenu);
navDrawerItems = new ArrayList<NavDrawerItem>();
navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons
.getResourceId(0, -1)));
navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons
.getResourceId(1, -1)));
navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons
.getResourceId(2, -1)));
// Recycle the typed array
navMenuIcons.recycle();
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
// setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(getActivity()
.getApplicationContext(), navDrawerItems);
mDrawerList.setAdapter(adapter);
mDrawerToggle = new ActionBarDrawerToggle(getActivity(), mDrawerLayout,
R.drawable.ic_drawer, // nav menu toggle icon
R.string.app_name, // nav drawer open - description for
// accessibility
R.string.app_name // nav drawer close - description for
// accessibility
) {
public void onDrawerClosed(View view) {
// getActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
// invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
// getActionBar().setTitle(mDrawerTitle);
// // calling onPrepareOptionsMenu() to hide action bar icons
// invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
/**
* Slide menu item click listener
* */
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// display view for selected nav drawer item
displayView(position);
}
}
public void checkfragment()
{
if (fragment != null) {
FragmentManager fragmentManager = getChildFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.truckinventory_form_fragmentgroup, fragment)
.commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(pos, true);
mDrawerList.setSelection(pos);
setTitle(navMenuTitles[pos]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// error in creating fragment
Log.e("MainActivity", "Error in creating fragment");
}
}
private void displayView(int position) {
// update the main content by replacing fragments
fragment = null;
pos = position;
Intent i;
switch (position) {
case 0:
// fragment = new FragmentLoadOut();
i = new Intent(getActivity(), RoutePasswords.class);
i.putExtra("activity", "LoadOutPass");
startActivityForResult(i, 11);
break;
case 1:
i = new Intent(getActivity(), RoutePasswords.class);
i.putExtra("activity", "LoadTransferPass");
startActivityForResult(i, 12);
// fragment = new FragmentLoadtransfer();
break;
case 2:
i = new Intent(getActivity(), RoutePasswords.class);
i.putExtra("activity", "ViewStockPass");
startActivityForResult(i, 13);
// fragment = new FragmentStockview();
break;
default:
break;
}
checkfragment();
}
public void setTitle(CharSequence title) {
mTitle = title;
// getSupportActionBar().setTitle(mTitle);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("nzm", "TruckInventoryFragment");
Log.d("nzm", "" + data + "requestCode" + requestCode);
//super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 11:
if (data.getBooleanExtra("password", true)) {
Log.d("nzm",
"onActivityResult:bolvalue"
+ data.getBooleanExtra("password", true));
fragment = new FragmentLoadOut();
checkfragment();
}
break;
case 12:
if (data.getBooleanExtra("password", true)) {
Log.d("nzm",
"onActivityResult:bolvalue"
+ data.getBooleanExtra("password", true));
fragment = new FragmentLoadtransfer();
checkfragment();
}
break;
case 13:
if (data.getBooleanExtra("password", true)) {
Log.d("nzm",
"onActivityResult:bolvalue"
+ data.getBooleanExtra("password", true));
fragment = new FragmentStockview();
checkfragment();
}
break;
default:
break;
}
}
}
我的LOGCAT
07-08 14:48:06.398: W/dalvikvm(22927): threadid=1: thread exiting with uncaught exception (group=0x40aac228)
07-08 14:48:06.418: E/AndroidRuntime(22927): FATAL EXCEPTION: main
07-08 14:48:06.418: E/AndroidRuntime(22927): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=131084, result=-1, data=Intent { (has extras) }} to activity {com.winwrench.pos/com.winwrench.pos.HomeActivity}: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.app.ActivityThread.deliverResults(ActivityThread.java:3398)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3448)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.app.ActivityThread.access$1100(ActivityThread.java:139)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.os.Handler.dispatchMessage(Handler.java:99)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.os.Looper.loop(Looper.java:156)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.app.ActivityThread.main(ActivityThread.java:4987)
07-08 14:48:06.418: E/AndroidRuntime(22927): at java.lang.reflect.Method.invokeNative(Native Method)
07-08 14:48:06.418: E/AndroidRuntime(22927): at java.lang.reflect.Method.invoke(Method.java:511)
07-08 14:48:06.418: E/AndroidRuntime(22927): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
07-08 14:48:06.418: E/AndroidRuntime(22927): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
07-08 14:48:06.418: E/AndroidRuntime(22927): at dalvik.system.NativeStart.main(Native Method)
07-08 14:48:06.418: E/AndroidRuntime(22927): Caused by: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1343)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1361)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
07-08 14:48:06.418: E/AndroidRuntime(22927): at com.winwrench.pos.fragments.TruckInventoryFragment.checkfragment(TruckInventoryFragment.java:132)
07-08 14:48:06.418: E/AndroidRuntime(22927): at com.winwrench.pos.fragments.TruckInventoryFragment.onActivityResult(TruckInventoryFragment.java:213)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.support.v4.app.FragmentActivity.onActivityResult(FragmentActivity.java:166)
07-08 14:48:06.418: E/AndroidRuntime(22927): at com.winwrench.pos.HomeActivity.onActivityResult(HomeActivity.java:390)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.app.Activity.dispatchActivityResult(Activity.java:4747)
07-08 14:48:06.418: E/AndroidRuntime(22927): at android.app.ActivityThread.deliverResults(ActivityThread.java:3394)
07-08 14:48:06.418: E/AndroidRuntime(22927): ... 11 more
答案 0 :(得分：1)
你应该检查onActivityResult中的data!=null。将以下代码替换为onActvitiyResult，然后参阅。
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("nzm", "TruckInventoryFragment");
Log.d("nzm", "" + data + "requestCode" + requestCode);
//super.onActivityResult(requestCode, resultCode, data);
if(data==null)
{
Log.d("nzm", "Failed to deliver result");
return;
}
switch (requestCode) {
case 11:
if (data.getBooleanExtra("password", true)) {
Log.d("nzm",
"onActivityResult:bolvalue"
+ data.getBooleanExtra("password", true));
fragment = new FragmentLoadOut();
checkfragment();
}
break;
case 12:
if (data.getBooleanExtra("password", true)) {
Log.d("nzm",
"onActivityResult:bolvalue"
+ data.getBooleanExtra("password", true));
fragment = new FragmentLoadtransfer();
checkfragment();
}
break;
case 13:
if (data.getBooleanExtra("password", true)) {
Log.d("nzm",
"onActivityResult:bolvalue"
+ data.getBooleanExtra("password", true));
fragment = new FragmentStockview();
checkfragment();
}
break;
default:
break;
}
}
答案 1 :(得分：1)
更改
fragmentManager.beginTransaction().
replace(R.id.truckinventory_form_fragmentgroup, fragment).commit();
到
fragmentManager.beginTransaction().
replace(R.id.truckinventory_form_fragmentgroup, fragment).commitAllowingStateLoss();
这是一个已知的错误，如this question所述。