android frament跳转activity

Question

报这个空指针异常，这只是一个toast提示UiUtil.longToast(getView().getContext(), getString(R.string.token_error));
//Toast.makeText(getView().getContext(), "您已在其他地方登录，若非您本人操作，您的密码可能已经泄露，请重新登录！", Toast.LENGTH_SHORT).show();

            UserInfo.oauthToken = "";
            UserInfo.refreshToken = "";
            UserInfo.uid = "";

            Intent intent = new Intent(getActivity(), MainActivity.class);
            // 注意本行的FLAG设置
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            intent.putExtra("reopen", true);
            // 已在manifest中添加MainActivity的android:launchMode="singleTop"属性
            // intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
            getActivity().startActivity(intent);
            报错-----------------------------------------------
            06-22 09:08:30.175: E/AndroidRuntime(2859): java.lang.NullPointerException

06-22 09:08:30.175: E/AndroidRuntime(2859): at com.**.frame.AccountFragment$GetDataAsync.onPostExecute(AccountFragment.java:364)
06-22 09:08:30.175: E/AndroidRuntime(2859): at com.**.frame.AccountFragment$GetDataAsync.onPostExecute(AccountFragment.java:1)
06-22 09:08:30.175: E/AndroidRuntime(2859): at android.os.AsyncTask.finish(AsyncTask.java:632)
06-22 09:08:30.175: E/AndroidRuntime(2859): at android.os.AsyncTask.access$600(AsyncTask.java:177)
06-22 09:08:30.175: E/AndroidRuntime(2859): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
06-22 09:08:30.175: E/AndroidRuntime(2859): at android.os.Handler.dispatchMessage(Handler.java:102)
06-22 09:08:30.175: E/AndroidRuntime(2859): at android.os.Looper.loop(Looper.java:136)
06-22 09:08:30.175: E/AndroidRuntime(2859): at android.app.ActivityThread.main(ActivityThread.java:5314)
06-22 09:08:30.175: E/AndroidRuntime(2859): at java.lang.reflect.Method.invokeNative(Native Method)
06-22 09:08:30.175: E/AndroidRuntime(2859): at java.lang.reflect.Method.invoke(Method.java:515)
06-22 09:08:30.175: E/AndroidRuntime(2859): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
06-22 09:08:30.175: E/AndroidRuntime(2859): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:680)
06-22 09:08:30.175: E/AndroidRuntime(2859): at dalvik.system.NativeStart.main(Native Method)

Answer 1

Studio下建立运行得项目吗？表示代码和日志还想都不是很全