小编cyb*_*oid的帖子

在android中,我正在编写一个单击按钮的文件,并在下次单击时,它保存文件并关闭缓冲的编写器.但是,我还希望在onDestroy函数中实现关闭缓冲编写器的功能.在此之前,我需要知道是否Bufferedwriter已经关闭.我如何检查Buffered Writer是否已经关闭？

除此之外,bufferedWriter.close()功能设置bufferedWriter为null？

以下是android代码片段

runOnUiThread(new Runnable() {\n                                public void run() {\n                                    AlertDialog alertDialog;\n                                    alertDialog = new AlertDialog.Builder(MainActivity.this).create();\n                                    alertDialog.setTitle("Network error");\n                                    alertDialog.setMessage("Disconnected");\n                                    alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "ok", new DialogInterface.OnClickListener() {\n                                        /** ON clicking oKay button **/\n                                        public void onClick(DialogInterface dialog, int id)\n                                        {\n\n                                            hasConnectServiceStarted = false;\n                                            IP = null;\n//                                            Intent intent = getIntent();\n                                            Intent intentSplash = new Intent(getApplication().getApplicationContext(), SplashActivity.class);\n\n                                            /** Shutdown the nodemain executor service if\n                                             * HOST goes down\n                                             */\n                                            nodeMainExecutorService.forceShutdown();\n                                            /** and restart the Main Activity that will prompt\n                                             * user to reconnect to the …

是什么

this statement may fall through [-Werror=implicit-fallthrough=]

意思 ？

我在这样的语句编译时收到此错误：

switch(eT)
    {
    case SEL_CRIT:
        {
            TYPE1* psSel;
            iRetVal = dbseq(enB->m_ps,
                NULL, NULL, &esM, NULL, ESEC);
            while (iRetVal == 0)
            {
                if(psEnterprise)
                {
                    bool iFound = false;
                    for (i = 0; i< psME->m_pslave[0].m_uc; i++)
                    {
                        ENT node1;
                        sEOS = psME>m_pslave[0].m_pslavecnt[i];

                    }
                    if (iFound && (psME->m_NOTOVERLOADED == false))
                    {
                        return psME;
                    }
                }
            }
            psSel = (M_EN*)pCrit;
            LOG_INFO(FAIL_TO_LOAD, psME->m_ONG, psME->EN);
            int_Enterprise = NULL;
        }

在

int_Enterprise = NULL;

哪里

int_Enterprise是某种结构指针。

我怎样才能解决这个问题？