谢谢@gunar，但我认为有更好的方法。

医生说:

*如果您提交的单个事务没有修改 *碎片回栈，强烈考虑使用 * {@link FragmentTransaction#commitNow()}代替。这有助于避免 *当应用程序中的其他代码未提交时，会产生不必要的副作用 *需要不同时间的事务。 ＊ * @return如果有任何待处理事务则返回true *执行。 * / executePendingTransactions();

所以使用commitNow替换:

fragmentTransaction.commit();
FragmentManager.executePendingTransactions()

I solved the issue with onconfigurationchanged. The trick is that according to android activity life cycle, when you explicitly called an intent(camera intent, or any other one); the activity is paused and onsavedInstance is called in that case. When rotating the device to a different position other than the one during which the activity was active; doing fragment operations such as fragment commit causes Illegal state exception. There are lots of complains about it. It's something about android activity lifecycle management and proper method calls. To solve it I did this: 1-Override the onsavedInstance method of your activity, and determine the current screen orientation(portrait or landscape) then set your screen orientation to it before your activity is paused. that way the activity you lock the screen rotation for your activity in case it has been rotated by another one. 2-then , override onresume method of activity, and set your orientation mode now to sensor so that after onsaved method is called it will call one more time onconfiguration to deal with the rotation properly.

你可以复制/粘贴这段代码到你的活动来处理它:

@Override
protected void onSaveInstanceState(Bundle outState) {       
    super.onSaveInstanceState(outState);

    Toast.makeText(this, "Activity OnResume(): Lock Screen Orientation ", Toast.LENGTH_LONG).show();
    int orientation =this.getDisplayOrientation();
    //Lock the screen orientation to the current display orientation : Landscape or Potrait
    this.setRequestedOrientation(orientation);
}

//A method found in stackOverflow, don't remember the author, to determine the right screen orientation independently of the phone or tablet device 
public int getDisplayOrientation() {
    Display getOrient = getWindowManager().getDefaultDisplay();

    int orientation = getOrient.getOrientation();

    // Sometimes you may get undefined orientation Value is 0
    // simple logic solves the problem compare the screen
    // X,Y Co-ordinates and determine the Orientation in such cases
    if (orientation == Configuration.ORIENTATION_UNDEFINED) {
        Configuration config = getResources().getConfiguration();
        orientation = config.orientation;

        if (orientation == Configuration.ORIENTATION_UNDEFINED) {
        // if height and widht of screen are equal then
        // it is square orientation
            if (getOrient.getWidth() == getOrient.getHeight()) {
                orientation = Configuration.ORIENTATION_SQUARE;
            } else { //if widht is less than height than it is portrait
                if (getOrient.getWidth() < getOrient.getHeight()) {
                    orientation = Configuration.ORIENTATION_PORTRAIT;
                } else { // if it is not any of the above it will defineitly be landscape
                    orientation = Configuration.ORIENTATION_LANDSCAPE;
                }
            }
        }
    }
    return orientation; // return value 1 is portrait and 2 is Landscape Mode
}

@Override
public void onResume() {
    super.onResume();
    Toast.makeText(this, "Activity OnResume(): Unlock Screen Orientation ", Toast.LENGTH_LONG).show();
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
} 

经过研究，这个问题的解决方案是做你的片段提交在onresume。

来源:https://wenchaojames.wordpress.com/2013/01/12/illegalstateexception-from-onactivityresult/

在屏幕被锁定\blank并且Activity +对话框的实例状态被保存之后，在对话框片段上调用dismiss()也会发生这种情况。要绕过这个调用:

dismissAllowingStateLoss()

实际上，每次我解散一个对话框时，我都不再关心它的状态了，所以这样做是可以的——实际上你并没有失去任何状态。

我认为生命周期状态可以帮助防止这种崩溃从Android支持库v26.1.0开始，你可以有以下检查:

if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED)){
  // Do fragment's transaction commit
}

或者你可以试试:

Fragment.isStateSaved()

更多信息请点击这里 https://developer.android.com/reference/android/support/v4/app/Fragment.html isStateSaved ()

我也有同样的问题，经过一天的分析，所有的文章，博客和stackoverflow，我找到了一个简单的解决方案。完全不要使用savedInstanceState，这是一行代码的条件。在片段代码上:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(null);
    .....