Java 如何从dialogFragment中替换片段？

我正在尝试创建一个简单的游戏，在某些片段上，当按下后退按钮时，它将显示一个对话框片段，请求退出、继续或重试游戏。当按下重试按钮时，活动上的当前片段应该被替换，但我一直收到“活动已被销毁”错误

反压时

@Override
    public void onBackPressed()
    {
        Fragment currentFragment = getFragmentManager().findFragmentById(android.R.id.content);

        Bundle currentFragmentArguments = currentFragment.getArguments();

        if (currentFragmentArguments != null)
                currentPlayer = (Players)currentFragmentArguments.getSerializable("currentPlayer");

        //if not on last fragment(fight) then check if can go back to last fragment
        if (!currentFragment.getTag().contains("fight"))
        {
            // Is there more than one fragment saved(1 is main menu fragment) and is player 1?
            // Player 2 can only go back when drawing
            if (getFragmentManager().getBackStackEntryCount() > 1  && 
                    (currentPlayer == null || currentPlayer.equals(Players.p1)))
            {
                getFragmentManager().popBackStack();
            }

            //Player 2 can't go back if picking weapon
            else if (currentFragment.equals(Players.p2)
                    && !currentFragment.getTag().contains("weapon"))
            {
                getFragmentManager().popBackStack();
            }

            else
            {
                //show to exit or go back to main menu

                ShowDialog(); //<-- This is the important part
            }
        }

        else
        {    
            ShowDialog(); //<-- This is the important part
        }
    }

public void ReplaceFragment(Fragment fragment, int contentId, FragmentManager fragmentManager,
                                String fragmentTag, boolean shouldAddToBackStack)
    {
        fragmentTrans = fragmentManager.beginTransaction();

        if (shouldAddToBackStack)
        {
            fragmentTrans.addToBackStack(fragmentTag);
        }

        fragmentTrans.replace(contentId, fragment, fragmentTag);

        fragmentTrans.commit();
    }

重新启动按钮侦听器（位于dialogFragment上）

重启游戏

@Override
    public void RestartGame()
    {
       MainMenuFragment mainMenuFragment = new MainMenuFragment();

        fragmentConfig.ReplaceFragment(mainMenuFragment, android.R.id.content,
                getFragmentManager(), mainMenuFragment.GetTag(), false);
    }

ReplaceFragment（这是引发错误的地方）

Logcat

restartBtn.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                dialogStateTxt = DialogStates.Restart.toString();

                dismiss();

                Main main = new Main();

                main.RestartGame();
            }
        });

    Process: retroroots.alphadraja, PID: 24440

    java.lang.IllegalStateException: Activity has been destroyed

    at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1345)

    at android.app.BackStackRecord.commitInternal(BackStackRecord.java:597)

    at android.app.BackStackRecord.commit(BackStackRecord.java:575)

    at retroroots.alphadraja.CanisterEngine.Android.Fragment.FragmentConfig.ReplaceFragment(FragmentConfig.java:70)

    at retroroots.alphadraja.Main.RestartGame(Main.java:71)

    at retroroots.alphadraja.CanisterEngine.Android.Widgets.Dialog$2.onClick(Dialog.java:63)

    at android.view.View.performClick(View.java:4473)

    at android.view.View$PerformClick.run(View.java:18472)

    at android.os.Handler.handleCallback(Handler.java:733)

at android.os.Handler.dispatchMessage(Handler.java:95)

at android.os.Looper.loop(Looper.java:136)

at android.app.ActivityThread.main(ActivityThread.java:5021)

at java.lang.reflect.Method.invokeNative(Native Method)

at java.lang.reflect.Method.invoke(Method.java:515)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)

at dalvik.system.NativeStart.main(Native Method)

android开发有点新，解决这个问题可能会教我一些东西

另外，请解释你的答案

---

谢谢

如果要显示

片段

，请不要调用

super.onBackPressed（）

。仅当用户单击退出时执行它。这可能会导致您的

活动

被销毁。

通过在片段而不是主活动上声明

重新启动游戏

来解决此问题。谢谢你的帮助

这有点困难，整个游戏（应用程序）都是建立在碎片上的。你能给我举个例子吗？当按下后退按钮并创建对话框时，只在退出按钮的onClickListener内调用super.onBackPressed（）。对不起，我误解了你的意思。我没有使用super.onBackPressed（）我已经更新了我的问题。我添加了OnBackPressed定义，可能是因为在main.RestartGame（）之前调用dismise。

    Process: retroroots.alphadraja, PID: 24440

    java.lang.IllegalStateException: Activity has been destroyed

    at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1345)

    at android.app.BackStackRecord.commitInternal(BackStackRecord.java:597)

    at android.app.BackStackRecord.commit(BackStackRecord.java:575)

    at retroroots.alphadraja.CanisterEngine.Android.Fragment.FragmentConfig.ReplaceFragment(FragmentConfig.java:70)

    at retroroots.alphadraja.Main.RestartGame(Main.java:71)

    at retroroots.alphadraja.CanisterEngine.Android.Widgets.Dialog$2.onClick(Dialog.java:63)

    at android.view.View.performClick(View.java:4473)

    at android.view.View$PerformClick.run(View.java:18472)

    at android.os.Handler.handleCallback(Handler.java:733)

at android.os.Handler.dispatchMessage(Handler.java:95)

at android.os.Looper.loop(Looper.java:136)

at android.app.ActivityThread.main(ActivityThread.java:5021)

at java.lang.reflect.Method.invokeNative(Native Method)

at java.lang.reflect.Method.invoke(Method.java:515)

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)

at dalvik.system.NativeStart.main(Native Method)