fragmentTransaction.commit（）上的“ java.lang.IllegalStateException：在onSaveInstanceState之后無法執行此操作”

Question

我似乎無法理解這一點。 我已經研究過Stack Overflow必須提供的解決方案。

我有2個活動，例如A和B； 當我從B返回A並選擇一個圖像返回B時，片段事務均無效，並引發錯誤，如下所示。

碼：

MainMenuFragment.java

 @Override
public void onClick(View v) {
    switch (v.getId()){
        case R.id.menu_filter:
            activity.changeMode(EditImageActivity.MODE_FILTERS);
            activity.sliderFragment.resetBitmaps();
            activity.changeMiddleFragment(EditImageActivity.MODE_FILTERS);
            break;
        case R.id.menu_enhance:
            activity.changeMode(EditImageActivity.MODE_ENHANCE);
            activity.sliderFragment.resetBitmaps();
            activity.changeMiddleFragment(EditImageActivity.MODE_ENHANCE);
            break;
        case R.id.menu_adjust:
            activity.changeMode(EditImageActivity.MODE_ADJUST);
            activity.changeMiddleFragment(EditImageActivity.MODE_ADJUST);
            break;
        case R.id.menu_sticker:
            activity.changeMode(EditImageActivity.MODE_STICKER_TYPES);
            activity.changeMiddleFragment(EditImageActivity.MODE_STICKER_TYPES);
            break;
        case R.id.menu_write:
            activity.changeMode(EditImageActivity.MODE_WRITE);
            activity.changeMiddleFragment(EditImageActivity.MODE_WRITE);
            break;
    }
}

EditImageActivity.java

 public void changeMiddleFragment(int index) {
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.setCustomAnimations(R.anim.slide_up, R.anim.slide_down);
        transaction.replace(R.id.preview_container, getFragment(index, this));
        transaction.commit();
}

錯誤：

FATAL EXCEPTION: main
     Process: org.ArtIQ.Rex, PID: 9739
     java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
         at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1842)
         at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1860)
         at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:650)
         at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:609)
         at org.ArtIQ.Rex.editor.EditImageActivity.changeMiddleFragment(EditImageActivity.java:392)
         at org.ArtIQ.Rex.editor.fragment.MainMenuFragment.onClick(MainMenuFragment.java:82)
         at android.view.View.performClick(View.java:5637)
         at android.view.View$PerformClick.run(View.java:22429)
         at android.os.Handler.handleCallback(Handler.java:751)
         at android.os.Handler.dispatchMessage(Handler.java:95)
         at android.os.Looper.loop(Looper.java:154)
         at android.app.ActivityThread.main(ActivityThread.java:6119)
         at java.lang.reflect.Method.invoke(Native Method)
         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

Answer 1

將transaction.commit()更改為transaction.commitAllowingStateLoss()應該可以解決此問題。