Java HttpClient错误

我尝试使用http客户端通过web服务器上的php脚本执行一些简单的snmp操作。因此php脚本侦听以获取参数。这是我的密码：

 EditText host   = (EditText)findViewById(R.id.editText);
        EditText port   = (EditText)findViewById(R.id.editText2);
        EditText community   = (EditText)findViewById(R.id.editText3);

                String url = "http://192.168.0.102/za/getstatus.php?host=" + host.getText().toString() + "&port=" + port.getText().toString() + "&com=" + community.getText().toString() + "&oid=" + 2 + "&port1=" + 2;
// here is my url = http://192.168.0.102/za/getstatus.php?
// host=192.168.0.101&port=10100&com=private&oid=2&port1=2

        HttpClient httpclient = new DefaultHttpClient();

        // Prepare a request object
        HttpPost httpPost = new HttpPost(url);

        try {
            HttpResponse response = httpclient.execute(httpPost);

            // writing response to log
            Log.d("Http Response:", response.toString());
        } catch (ClientProtocolException e) {
            // writing exception to log
            e.printStackTrace();
        } catch (IOException e) {
            // writing exception to log
            e.printStackTrace();

        }

发送Http post时应该得到的响应是整数：0或整数：1，因此我应该检查该结果

尝试发送http post时的错误日志：

12-29 06:48:21.979    1545-1545/com.example.test.test1 E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.test.test1, PID: 1545
    java.lang.IllegalStateException: Could not execute method of the activity
            at android.view.View$1.onClick(View.java:3823)
            at android.view.View.performClick(View.java:4438)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3818)
            at android.view.View.performClick(View.java:4438)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.os.NetworkOnMainThreadException
            at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1145)
            at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
            at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
            at libcore.io.IoBridge.connect(IoBridge.java:112)
            at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
            at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
            at java.net.Socket.connect(Socket.java:843)
            at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
            at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
            at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
            at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
            at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
            at com.example.zara.sunsannici.MainActivity.selfDestruct(MainActivity.java:51)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3818)
            at android.view.View.performClick(View.java:4438)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)
12-29 06:48:24.919    1545-1545/com.example.test.test1 I/Process﹕ Sending signal. PID: 1545 SIG: 9

也许我还可以用其他的方法。例如，在C#中，我使用更易于使用和获取返回文本的WebClient

---

谢谢您的帮助。

您无法在UI线程中创建它

下面是一个使用AsyncTask的示例

EditText host   = (EditText)findViewById(R.id.editText);
    EditText port   = (EditText)findViewById(R.id.editText2);
    EditText community   = (EditText)findViewById(R.id.editText3);

    String url = "http://192.168.0.102/za/getstatus.php?host=" + host.getText().toString() + "&port=" + port.getText().toString() + "&com=" + community.getText().toString() + "&oid=" + 2 + "&port1=" + 2;

    new Task(url).execute();

    }

    class Task extends AsyncTask<Void, Void, HttpResponse>{
        private String url;

        Task(String url) {
            this.url = url;
        }

        @Override
        protected HttpResponse doInBackground(Void... voids) {
            HttpClient httpclient = new DefaultHttpClient();

            // Prepare a request object
            HttpPost httpPost = new HttpPost(url);

            try {
                return httpclient.execute(httpPost);

            } catch (ClientProtocolException e) {
                // writing exception to log
                e.printStackTrace();
            } catch (IOException e) {
                // writing exception to log
                e.printStackTrace();
            return null;
        }

        @Override
        protected void onPostExecute(HttpResponse httpResponse) {
            super.onPostExecute(httpResponse);
            if(httpResponse != null){
                Log.d("Http Response:", response.toString());
            }
        }
    }

EditText主机=（EditText）findViewById（R.id.EditText）；
EditText端口=（EditText）findViewById（R.id.editText2）；
EditText社区=（EditText）findViewById（R.id.editText3）；
字符串url=”http://192.168.0.102/za/getstatus.php?host=“+host.getText（）.toString（）+”&port=“+port.getText（）.toString（）+”&com=“+community.getText（）.toString（）+”&oid=“+2+”&port1=“+2；
新任务（url）.execute（）；
}
类任务扩展了异步任务{
私有字符串url；
任务（字符串url）{
this.url=url；
}
@凌驾
受保护的HttpResponse doInBackground（无效…无效）{
HttpClient HttpClient=新的DefaultHttpClient（）；
//准备一个请求对象
HttpPost HttpPost=新的HttpPost（url）；
试一试{
返回httpclient.execute（httpPost）；
}捕获（客户端协议例外e）{
//将异常写入日志
e、 printStackTrace（）；
}捕获（IOE异常）{
//将异常写入日志
e、 printStackTrace（）；
返回null；
}
@凌驾
受保护的void onPostExecute（HttpResponse HttpResponse）{
super.onPostExecute（httpResponse）；
if（httpResponse！=null）{
Log.d（“Http响应：，Response.toString（））；
}
}
}

如错误所示，您不能在主活动上使用http请求（POST/get）。请创建另一个活动来执行此操作或创建一个异步任务。