相关疑难解决方法(0)

我有一个LoginActivity(用户登录).它基本上是它自己Activity的主题就像一个对话框(看起来像一个对话框).它出现在一个SherlockFragmentActivity.我想要的是:如果登录成功,应该有两个FragmentTransaction更新视图.这是代码:

在LoginActivity,如果成功登录,

setResult(1, new Intent());

在SherlockFragmentActivity:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode == 1) {
        LoggedStatus = PrefActivity.getUserLoggedInStatus(this);
        FragmentTransaction t = MainFragmentActivity.this.getSupportFragmentManager().beginTransaction();
        SherlockListFragment mFrag = new MasterFragment();
        t.replace(R.id.menu_frame, mFrag);
        t.commit();

        // Set up Main Screen
        FragmentTransaction t2 = MainFragmentActivity.this.getSupportFragmentManager().beginTransaction();
        SherlockListFragment mainFrag = new FeaturedFragment();
        t2.replace(R.id.main_frag, mainFrag);
        t2.commit();
    }
}

它在第一次提交时崩溃,使用此LogCat:

E/AndroidRuntime(32072): Caused by: java.lang.IllegalStateException: Can not perform this action …

我正在开发一个启动器应用程序,当用户验证自身时会显示对话框碎片.大部分时间这都运行良好,但有时我有这个错误日志:

02-07 18:55:56.619: E/AndroidRuntime(1300): java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1280)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1291)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.app.BackStackRecord.commitInternal(BackStackRecord.java:548)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.app.BackStackRecord.commit(BackStackRecord.java:532)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.app.DialogFragment.dismissInternal(DialogFragment.java:292)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.app.DialogFragment.dismiss(DialogFragment.java:258)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at com.blablabla.android.app.fragments.login.LoginResultFragment$CloseDialogRunnable.run(LoginResultFragment.java:59)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.os.Handler.handleCallback(Handler.java:615)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.os.Handler.dispatchMessage(Handler.java:92)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.os.Looper.loop(Looper.java:137)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at android.app.ActivityThread.main(ActivityThread.java:4745)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at java.lang.reflect.Method.invokeNative(Native Method)
02-07 18:55:56.619: E/AndroidRuntime(1300):     at java.lang.reflect.Method.invoke(Method.java:511)
02-07 18:55:56.619: …

我刚开始使用Android支持库中的DialogFragment,到目前为止发现它非常烦人.我有一些从我的应用程序中的不同位置调用的自定义AsyncTasks.有两种情况我遇到DialogFragments的问题:

1. 调试时屏幕关闭
2. 当我想从onActivityResult()打开FragmentDialog时

至少我认为两者都是相当常见的情况,在这两种情况下我都得到了

java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState

这就是我的AsyncTasks的结构:

private class UploadImageAsyncTask extends AsyncTask<Void, Void, Image> {
    private ProgressDialogFragment dialog;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        FragmentManager fm = getSupportFragmentManager();
        dialog = new ProgressDialogFragment();
        dialog.show(fm, "ProgressDialogFragment");
    }

    @Override
    protected Image doInBackground(Void... params) {
        ...
    }

    @Override
    protected void onPostExecute(Image result) {
        super.onPostExecute(result);
        dialog.dismiss();

        ...
        }
    }
}

我知道我可以设置一个设置,防止屏幕在调试时进入睡眠状态,我可以在onActivityResult()中设置一个标志,然后在onStart()中打开对话框,但这不是我真正想要的.还有更好的解决方案吗？

谢谢西蒙

我已经覆盖了onSavedInstanceState并删除了super,我没有做任何事务,更不用说易失性函数或异步函数中的事务了.

我在自定义回调'onUserExistsListener'中调用它

        @Override
        public Boolean userExists(Boolean exists) {
            if (exists) {


            }
            else
            {
             AlertDialogFragment Frag = AlertDialogFragment.newInstance(0, null);
             Frag.show(getSupportFragmentManager(), "warndialog");
            }
   };

尝试了其他SO问题中提出的所有内容,仍然没有找到解决办法？任何人？

码:

AlertDialogFragment Frag = AlertDialogFragment.newInstance(0, null);
 Frag.show(getSupportFragmentManager(), "warndialog");

过程:

OnCreate :( LoadNames函数)

LoadNames回调 - >显示对话框.

进一步:

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        add_name_to_db();
    }

功能:

public void add_name_to_db() {
        Details.checkNameExists(user_txt.getText().toString());
        Details.setOnUserExistsListener(new onUserExistsListener() {

            @Override
            public Boolean userExists(Boolean exists) {

                if (exists) 
                    {

                    } else {

                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                AlertDialogFragment …