java. Lang. IllegalStateException: commit has been called

I tried the following code,

try {
    final Activity activity = ctx;
    FragmentTransaction ft = activity.getFragmentManager().beginTransaction();
    android.app.Fragment prev = activity.getFragmentManager().findFragmentByTag("dialog");
    if (prev != null) {
        ft.remove(prev);
    }
    DialogServiceFailed newFragment = DialogServiceFailed.newInstance(pageName,onServiceFailed);
    newFragment.show(ft,"dialog");
    ft.addToBackStack(null);
    ft.commitAllowingStateLoss();
} catch (ClassCastException e) {
    Log.d("Log","Can't get the fragment manager with this");
}

But I received the following exception and my application crashed

java.lang.IllegalStateException: commit already called
        at android.app.BackStackRecord.commitInternal(BackStackRecord.java:582)
        at android.app.BackStackRecord.commitAllowingStateLoss(BackStackRecord.java:578)
        at com.brightspot.extrain5psim.model.APIRequestHandler.loadServiceFailedDialog(APIRequestHandler.java:99)
        at com.brightspot.extrain5psim.view.fragments.LoginFragment.setOnAsyncTaskCompleted(LoginFragment.java:201)
        at com.brightspot.extrain5psim.model.APIRequestHandler.onPostExecute(APIRequestHandler.java:80)
        at com.brightspot.extrain5psim.model.APIRequestHandler.onPostExecute(APIRequestHandler.java:17)
        at android.os.AsyncTask.finish(AsyncTask.java:631)
        at android.os.AsyncTask.access$600(AsyncTask.java:177)
        at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:176)
        at android.app.ActivityThread.main(ActivityThread.java:5317)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
        at dalvik.system.NativeStart.main(Native Method)

Solution

newFragment.show(ft,"dialog")

newFragment.show(ft,"dialog")

Show calls internal submission So you might want to get rid of it

ft.commitAllowingStateLoss();

Or you can get rid of it

newFragment.show(ft,"dialog");

Add phone

ft.add(newFragment,"dialog");
ft.commitAllowingStateLoss();

edit

This is what dialogfragment's show () looks like

public int show(FragmentTransaction transaction,String tag) {
        mDismissed = false;
        mShownByMe = true;
        transaction.add(this,tag);
        mViewDestroyed = false;
        mBackStackId = transaction.commit();
        return mBackStackId;
}