从Activity调用DialogFragment导致"IllegalStateException:片段未附加到Activity"

Question

我有一个具有Fragment的Activity,我需要显示一个DialogFragment(在片段中声明为public和static)以便将用户注销.在此对话框中,我需要发出服务器请求,完成后,必须取消对话框.

这里的问题是,当服务器请求到达时,我收到错误"IllegalStateException:fragment not attached to Activity"

有没有办法解决这个问题？

编辑:

这是logcat输出:

E/AndroidRuntime(13849): java.lang.IllegalStateException: Fragment LogoutDialogFragment{4256be70} not attached to Activity
E/AndroidRuntime(13849):    at android.support.v4.app.Fragment.startActivity(Fragment.java:836)
E/AndroidRuntime(13849):    at nl.emte.merchant.ui.EmteActivity$LogoutDialogFragment$1$1.onDataLoad(EmteActivity.java:328)
E/AndroidRuntime(13849):    at nl.emte.merchant.api.EmteApiManager$5.onPostExecute(EmteApiManager.java:212)

这是的代码LogOutFragment也就是DialogFragment,允许用户退出:

public static class LogoutDialogFragment extends SherlockDialogFragment {

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
            builder.setCancelable(true);
            builder.setMessage(R.string.logout_screen_description);
            builder.setPositiveButton(R.string.logout_positive_button_lbl,
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            dialog.dismiss();
                            EmteApiManager.getInstance().doLogout(new DataLoadListner() {

                                @Override
                                public void onError(Object errorMessage) {
                                }

                                @Override
                                public void onDataLoad(Object result) {
                                    Intent intent = new Intent(
                                            IntentActions.ACTION_LOGIN);
                                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                    startActivity(intent);
                                }
                            });

                        }
                    }).setNegativeButton(R.string.logout_negative_button_lbl,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.dismiss();
                        }
                    });
            return builder.create();
        }
    }

提前致谢!

Answer 1

您可以使用使用应用程序上下文进行回调的静态类.

活动和片段是短暂的,因此在异步回调之后依赖它们处于良好状态是危险的.