在Android程序中，我創建了HttpDelete方法來調用REST web服務。public void onCreate(Bundle savedInstanceState)    {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    TextView txt = (TextView) findViewById(R.id.textView1);    txt.setText(getInputStreamFromUrl("http://192.168.37.241:8080/kyaw/k"));    }    public static String getInputStreamFromUrl(String url) {          InputStream content = null;          HttpResponse response = null;          try {            DefaultHttpClient httpclient = new DefaultHttpClient();                         HttpDelete delete=new HttpDelete(url);            put.setHeader("Content-Type","application/vnd.org.snia.cdmi.container");            response = httpclient.execute(delete);            content = response.getEntity().getContent();          }catch (Exception e) {            Log.e("[DELETE REQUEST]", "Network exception");          }            String result=response.getStatusLine().toString()+"\n"+response.getHeaders(url);            return result;        }但是獲得以下異常868: ERROR/[DELETE REQUEST](1197): Network exception01-23 08:30:16.868: DEBUG/AndroidRuntime(1197): Shutting down VM01-23 08:30:16.878: WARN/dalvikvm(1197): threadid=1: thread exiting with uncaught exception (group=0x40015560)01-23 08:30:16.908: ERROR/AndroidRuntime(1197): FATAL EXCEPTION: main01-23 08:30:16.908: ERROR/AndroidRuntime(1197): java.lang.RuntimeException: Unable to start activity ComponentInfo誰能幫忙解釋一下呢？