Question

我有这个Android代码，它停留在synchronized语句中。即使我删除了process1.wait（）我捕获异常。感谢您的帮助吗？

 private class LongOperation extends AsyncTask<String, Void, String>
   {

      @Override
      protected String doInBackground(String... params)
      {
         try
         {
     Process process1 = new ProcessBuilder("sh", "/data/local/bin/tcpdump.sh").start();            
            synchronized(process1){
               process1.wait();
             }
         }
         catch (Exception e)
         {
            Log.e("Tcpdump function error", "Unable to capture the packets into the buffer");
         }
         return null;
      }

      /* (non-Javadoc)
       * @see android.os.AsyncTask#onPostExecute(java.lang.Object)
       */
      @Override
      protected void onPostExecute(String result)
      {
         try
         {  
            StringBuffer output = new StringBuffer();
            File file = new File("/data/local/bin/dump.txt");
            BufferedReader br = new BufferedReader(new FileReader(file), 8 * 1024);
            String line;
            while ((line = br.readLine()) != null)
            {
               output.append(line + "\n");
            }
            tv.setText(output);
            setContentView(tv);
         }
         catch (Exception e)
         {
            e.printStackTrace();
         }
      }

      /* (non-Javadoc)
      * @see android.os.AsyncTask#onProgressUpdate(Progress[])
      */
     @Override
     protected void onProgressUpdate(Void... values)
      {

      }
}

tcpdump.sh有这一行 tcpdump -c 10＆gt; /data/local/bin/dump.txt

Answer 1

您肯定打电话给Process.waitFor()?而不是wait()?

Android：java.lang.IllegalMonitorStateException：对象在wait（）之前未被线程锁定

1 个答案: