[英]java.lang.IllegalStateException - Can not perform this action after onSaveInstanceState
[英]java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState with DialogFragment
我遇到DialogFragment / getSupportFragmentManager / Android 4.x版的问题
01-10 19:46:48.228: E/AndroidRuntime(9879): java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1314)
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1325)
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:548)
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:532)
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.support.v4.app.DialogFragment.show(DialogFragment.java:127)
01-10 19:46:48.228: E/AndroidRuntime(9879): at com.v1.mypck.TermsAndConditions.showDialog(TermsAndConditions.java:256)
01-10 19:46:48.228: E/AndroidRuntime(9879): at com.v1.mypck.TermsAndConditions.handleMessage(TermsAndConditions.java:62)
01-10 19:46:48.228: E/AndroidRuntime(9879): at com.v1.mypck.TermsAndConditions$IncomingHandler.handleMessage(TermsAndConditions.java:53)
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.os.Handler.dispatchMessage(Handler.java:99)
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.os.Looper.loop(Looper.java:137)
01-10 19:46:48.228: E/AndroidRuntime(9879): at android.app.ActivityThread.main(ActivityThread.java:4441)
01-10 19:46:48.228: E/AndroidRuntime(9879): at java.lang.reflect.Method.invokeNative(Native Method)
01-10 19:46:48.228: E/AndroidRuntime(9879): at java.lang.reflect.Method.invoke(Method.java:511)
01-10 19:46:48.228: E/AndroidRuntime(9879): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-10 19:46:48.228: E/AndroidRuntime(9879): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-10 19:46:48.228: E/AndroidRuntime(9879): at dalvik.system.NativeStart.main(Native Method)
在下面的代码中,当我按回去时,它试图完成当前活动并返回到上一个活动,因此抛出上述错误。
代码在较旧的版本(4.x之前)上运行良好。
有人可以指导我正确的方向。
public class TermsAndConditions extends SherlockFragmentActivity implements LoaderManager.LoaderCallbacks<JSONObject>{
static final String TAG = "TermsAndConditions";
private static int titleResource;
private static int messageResource;
private IncomingHandler handler = null;
private static final int SHOW_NETWORK_DIALOG = 3;
static class IncomingHandler extends Handler {
private final WeakReference<TermsAndConditions> mTarget;
IncomingHandler(TermsAndConditions target) {
mTarget = new WeakReference<TermsAndConditions>(target);
}
@Override
public void handleMessage(Message msg) {
TermsAndConditions target = mTarget.get();
if (target != null) {
target.handleMessage(msg);
}
}
}
public void handleMessage(Message msg) {
switch (msg.what) {
case SHOW_NETWORK_DIALOG:
titleResource = R.string.msg_alert_no_network_title;
messageResource = R.string.msg_alert_no_network_message;
showDialog();
break;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.web_view);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportLoaderManager().initLoader(0, null, this);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void loadViewData() {
//Logic to load content.
}
@Override
public Loader<JSONObject> onCreateLoader(int arg0, Bundle arg1) {
if (handler == null){
handler = new IncomingHandler(TermsAndConditions.this);
}
return new JsonLoader(this);
}
@Override
public void onLoadFinished(Loader<JSONObject> arg0, JSONObject jsonData) {
if(jsonDataObject==null || jsonDataObject.length()==0) {
handler.sendEmptyMessage(SHOW_NETWORK_DIALOG);
} else {
loadViewData();
}
}
@Override
public void onLoaderReset(Loader<JSONObject> arg0) {
if(jsonDataObject==null || jsonDataObject.length()==0) {
handler.sendEmptyMessage(SHOW_NETWORK_DIALOG);
} else {
loadViewData();
}
}
public static class JsonLoader extends AsyncTaskLoader<JSONObject> {
public JsonLoader(Context context) {
super(context);
}
@Override
protected void onStartLoading() {
if (jsonDataObject != null) {
deliverResult(jsonDataObject);
}
if (takeContentChanged() || jsonDataObject == null) {
forceLoad();
}
}
@Override
public JSONObject loadInBackground() {
try {
return response.getJSONObject("result");
} catch (JSONException e) {
return null;
} catch (Throwable e) {
return null;
}
}
@Override
public void deliverResult(JSONObject newJsonData) {
if (isReset()) {
if (jsonDataObject != null) {
onReleaseResources(jsonDataObject);
}
}
JSONObject oldData = jsonDataObject;
jsonDataObject = newJsonData;
if (isStarted()) {
super.deliverResult(jsonDataObject);
}
if (oldData != null) {
onReleaseResources(oldData);
}
}
@Override
protected void onStopLoading() {
cancelLoad();
}
@Override public void onCanceled(JSONObject jsonData) {
super.onCanceled(jsonData);
onReleaseResources(jsonData);
}
@Override protected void onReset() {
super.onReset();
onStopLoading();
if (jsonDataObject != null) {
onReleaseResources(jsonDataObject);
jsonDataObject = null;
}
}
protected void onReleaseResources(JSONObject jsonData) {
jsonData = null;
}
}
public static class MyAlertDialogFragment extends DialogFragment {
public static MyAlertDialogFragment newInstance(int title) {
MyAlertDialogFragment frag = new MyAlertDialogFragment();
Bundle args = new Bundle();
args.putInt("title", title);
frag.setArguments(args);
return frag;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
int title = getArguments().getInt("title");
return new AlertDialog.Builder(getActivity())
.setTitle(title)
.setMessage(messageResource)
.setPositiveButton(R.string.alert_dialog_ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
}
)
.create();
}
}
public void showDialog() {
DialogFragment newFragment = MyAlertDialogFragment.newInstance(titleResource);
newFragment.show(getSupportFragmentManager(), "my_dialog");
}
}
这是另一个线程的答案:
onActivityResult中的操作和“错误onSaveInstanceState之后无法执行此操作”
也在这里:
这是解决此问题的示例:
DialogFragment loadingDialog = createDialog();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.add(loadingDialog, "loading");
transaction.commitAllowingStateLoss();
我遇到了同样的问题,我将代码更改为以下
newFragment.show(transactionFragment, "dialog");
至:
transactionFragment.add(android.R.id.content, newFragment).addToBackStack(null).commitAllowingStateLoss();
完整的代码对我来说非常好,希望对您有所帮助
FragmentTransaction transactionFragment = getActivity().getSupportFragmentManager().beginTransaction();
DialogPageListFragment newFragment = new DialogPageListFragment();
transactionFragment.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
newFragment.setArguments(extras);
transactionFragment.add(android.R.id.content, newFragment).addToBackStack(null).commitAllowingStateLoss();
可能是,响应HandleMessage的处理程序与已破坏的活动相关联。
例如:如果旋转屏幕,旧的被破坏的活动将处理该消息,然后您将调用showDialog,并且将引发异常:
在旧的已销毁活动调用其onSaveInstanceState之后,您将创建一个对话框。
尝试用新创建的活动替换回调,以确保始终在活动活动中创建对话框。
如果您不旋转,请在onSaveInstance上放置一个标记(例如“ saving”),然后在onRestoreInstance上将其禁用。 在您的handleMessage方法中,如果打开了“保存”标志,则不显示对话框,只需打开另一个标志,表明必须在onResume上创建对话框。 然后在onResume方法上,检查是否在该过程的中间,应该创建对话框,如果是,则在onResume方法上显示该对话框。
fragmentView.post(() -> {
FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
YourDialog yourDialog = YourDialog.newInstance();
yourDialog.show(ft, "text_data");
});
在这种情况下,post()方法的目标是等待Activity或Fragment的onResume()完成。 如果您想在关闭系统对话框后显示对话框,则可以从Fragment.fe中显示DialogFragment。
发布延迟Runnables handler.postDelayed(Runnable runnable,长时间延迟)时,我面临着同样的问题。
我已经通过这种方式解决了这个问题:
答案为时已晚,但可能是正确答案。 我做了一个父类,对话框片段从中扩展了
public class BaseDialogFragment extends DialogFragment {
@Override
public void show(FragmentManager manager, String tag) {
try {
FragmentTransaction ft = manager.beginTransaction();
ft.add(this, tag).addToBackStack(null);
ft.commitAllowingStateLoss();
} catch (IllegalStateException e) {
Log.d("ABSDIALOGFRAG", "Exception", e);
}
}
boolean mIsStateAlreadySaved = false;
boolean mPendingShowDialog = false;
@Override
public void onResume() {
onResumeFragments();
super.onResume();
}
public void onResumeFragments(){
mIsStateAlreadySaved = false;
if(mPendingShowDialog){
mPendingShowDialog = false;
showSnoozeDialog();
}
}
@Override
public void onPause() {
super.onPause();
mIsStateAlreadySaved = true;
}
private void showSnoozeDialog() {
if(mIsStateAlreadySaved){
mPendingShowDialog = true;
}else{
FragmentManager fm = getFragmentManager();
BaseDialogFragment snoozeDialog = new BaseDialogFragment();
snoozeDialog.show(fm, "BaseDialogFragment");
}
}
}
onPostResume()使用后恢复的方法做你的工作。我认为你调用onRestart或表演的onResume方法对话框,所以要避免它,并使用onPostResume()来显示你的对话框。
您可以检查当前活动是否为isActive(),仅在这种情况下才启动DialogFragment的片段事务。 我遇到了类似的问题,这项检查解决了我的问题。
有用:
CheckinSuccessDialog dialog = new CheckinSuccessDialog();
//dialog.show(getSupportFragmentManager(), null);
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(dialog, null);
ft.commitAllowingStateLoss();
但仍然很糟糕,因为出现错误“活动已被破坏”
ava.lang.IllegalStateException: Activity has been destroyed fragmentTransaction.commitAllowingStateLoss();
所以我的解决方案是添加检查if (!isFinishing()&&!isDestroyed())
CheckinSuccessDialog fragment = CheckinSuccessDialog.newInstance();
if (fragment instanceof DialogFragment) {
DialogFragment dialog = (DialogFragment) fragment;
if (!dialog.isAdded()) {
fragmentTransaction.add(dialog,
CheckinSuccessDialog.class.getName());
if (!isFinishing()&&!isDestroyed()) {
fragmentTransaction.commitAllowingStateLoss();
}
}
解雇时:
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
Fragment fragment = getSupportFragmentManager().findFragmentByTag(CheckinSuccessDialog.class.getName());
if (fragment != null && fragment instanceof DialogFragment) {
DialogFragment dialog = (DialogFragment) fragment;
dialog.dismiss();
if (!isFinishing()&&!isDestroyed()) {
fragmentTransaction.commitAllowingStateLoss();
}
}
在“ 活动”中 ,在显示对话框之前,您可以执行以下操作
getSupportFragmentManager().executePendingTransactions();
这对我有用。
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