Question

我连接一个ıp凸轮（jpeg），并显示此图像，并且ı不断重复，过了一会儿，我的应用程序错误了。我测试了其他手机并展示了这款手机。

10-28 15:12:51.525: ERROR/AndroidRuntime(675): Uncaught handler: thread Thread-11 exiting due to uncaught exception

我的代码：

public void parse(InputStream is){
  try {
   if (!type.isMjpegStream()) {
    CameraManagerScreen.ActiveCam.setConnected(true);
    setImage(is);
    is.close();
    System.gc();
    if(!mjpeghttp.isCanceled())
      go();
   } 
  } catch (Exception e) {
  }
 }

我的联系是：

protected void connect() {
 InputStream is = null;

try {



 HttpParams httpParameters = new BasicHttpParams();
 // Set the timeout in milliseconds until a connection is
 // established.
 int timeoutConnection = 20000;
 HttpConnectionParams.setConnectionTimeout(httpParameters,
   timeoutConnection);
 // Set the default socket timeout (SO_TIMEOUT)
 // in milliseconds which is the timeout for waiting for data.
 int timeoutSocket = 20000;
 HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

 client = new DefaultHttpClient(httpParameters);

 method = new HttpGet(getUrl());
 System.out.println("Baglanıyor:  " + method.getURI().toString());
 method.addHeader("Authorization", getBase64Encode());

 res = client.execute(method);
 System.out.println("RESPONSE: "
   + res.getStatusLine().getStatusCode());

 is = res.getEntity().getContent();

 if (!cancel) {
  onReturn(res.getStatusLine().getStatusCode(), is);

 }

} catch (Exception e) {
 System.out.println(e.getMessage());

 try {

  cancel = true;

  Thread.sleep(60);

 } catch (Exception ie) {
}
 onError(new Exception("0"));
}
}

...错误

 10-28 14:13:06.794: INFO/dalvikvm(3502): Stack overflow, expanding (0x439b0200 to 0x439b0000)
10-28 14:13:06.794: INFO/dalvikvm(3502): Shrank stack (to 0x439b0200, curFrame is 0x439b0268)
10-28 14:13:06.794: WARN/dalvikvm(3502): threadid=17: thread exiting with uncaught exception (group=0x4001b180)
10-28 14:06:19.944: ERROR/AndroidRuntime(3420): Uncaught handler: thread Thread-11 exiting due to uncaught exception
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420): java.lang.StackOverflowError
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.util.Hashtable.get(Hashtable.java:274)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.util.Properties.getProperty(Properties.java:177)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.lang.System.getProperty(System.java:440)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.lang.System.getProperty(System.java:412)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.lang.Boolean.getBoolean(Boolean.java:174)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.harmony.luni.net.NetUtil$Action.run(NetUtil.java:89)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.harmony.luni.net.NetUtil$Action.run(NetUtil.java:80)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.security.AccessController.doPrivilegedImpl(AccessController.java:264)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.security.AccessController.doPrivileged(AccessController.java:84)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.harmony.luni.net.NetUtil.preferIPv4Stack(NetUtil.java:61)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.harmony.luni.net.PlainSocketImpl.create(PlainSocketImpl.java:266)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.net.Socket.checkClosedAndCreate(Socket.java:889)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at java.net.Socket.connect(Socket.java:1036)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:140)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:348)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.connect(Http.java:75)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.connect(MjpegHttp.java:33)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.go(Http.java:46)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.CameraHttp.go(CameraHttp.java:13)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.go(Camera.java:121)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.parse(Camera.java:170)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.onReturn(MjpegHttp.java:23)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.connect(Http.java:82)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.connect(MjpegHttp.java:33)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.go(Http.java:46)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.CameraHttp.go(CameraHttp.java:13)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.go(Camera.java:121)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.parse(Camera.java:170)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.onReturn(MjpegHttp.java:23)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.connect(Http.java:82)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.connect(MjpegHttp.java:33)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.go(Http.java:46)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.CameraHttp.go(CameraHttp.java:13)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.go(Camera.java:121)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.parse(Camera.java:170)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.onReturn(MjpegHttp.java:23)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.connect(Http.java:82)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.connect(MjpegHttp.java:33)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.go(Http.java:46)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.CameraHttp.go(CameraHttp.java:13)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.go(Camera.java:121)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.parse(Camera.java:170)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.onReturn(MjpegHttp.java:23)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.connect(Http.java:82)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.connect(MjpegHttp.java:33)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.go(Http.java:46)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.CameraHttp.go(CameraHttp.java:13)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.go(Camera.java:121)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.parse(Camera.java:170)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.onReturn(MjpegHttp.java:23)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.connect(Http.java:82)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.MjpegHttp.connect(MjpegHttp.java:33)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.Http.go(Http.java:46)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.connection.CameraHttp.go(CameraHttp.java:13)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepvizyon.camera.Camera.go(Camera.java:121)
    10-28 14:06:19.994: ERROR/AndroidRuntime(3420):     at spexco.cepviz

Answer 1

public void parse(InputStream is){
    if(!mjpeghttp.isCanceled())
      go();

go()究竟做了什么？它调用connect()，调用

if (!cancel) {
  onReturn(res.getStatusLine().getStatusCode(), is);
 }

onReturn()再次致电parse()。 parse()拨打go()来电connect()来电onReturn()来电parse()来电......它永远不会（？）结束。为什么解析必须连接？每个函数调用都需要一点内存。经过大量调用后，没有剩余的内存，您将获得堆栈溢出异常。

你需要打破一些圈子。你可以删除它：

if(!mjpeghttp.isCanceled())
  go();

我认为它甚至不会睡一次

try {

  cancel = true;
  System.out.println("Sleep sleep!");
  Thread.sleep(60);

 } catch (Exception ie) {

是否打印？

怎么样？

imageSet=false;
while(!imageSet)
{
   if (connect())
     if(parse())
       imageSet=true;
}

Answer 2

看起来好像你一遍又一遍地嵌套调用，直到堆栈溢出（这个站点非常合适的问题= P）。

我猜你想让连接方法实际返回一个值而不是调用onReturn方法。这会阻止你的递归嵌套，并且应该摆脱这个特殊的问题。

Answer 3

我这样解决..再次感谢你... :)绝对我删除了 if(!mjpeghttp.isCanceled()) go();

// start connection to ip-camera
public void go() {

    if (mjpeghttp == null) {
        mjpeghttp = new MjpegHttp();
        mjpeghttp.start();

    }
    if (type.isMjpegStream()) {
        mjpeghttp.go(this);
    } else {
        while (mjpeghttp.isCanceled()==false)
            mjpeghttp.go(this);
    }

}

我无法解决这个问题...（过了一段时间我的应用程序错误了...）

3 个答案: