我试图从手机上测试的android活动（USB）到我笔记本电脑上的Apache Tomcat7中的Servlet进行交互。我正在创建一个按钮。点击我应该去下一个“活动”。但是当我尝试在两者之间联系服务器时，它会停止响应并且不会转到下一页。如果需要这些信息，我正在使用Ubuntu作为我的笔记本电脑操作系统和OnePlus作为我的手机。
以下是Android活动的代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_intent);
Button submit = (Button) findViewById(R.id.button1);
submit.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
new Login1().execute();
}
});
}
private class Login1 extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... paramss) {
DefaultHttpClient httpClient = new DefaultHttpClient();
String url = "http://192.168.1.100:8080/Server1/Server";
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("u", "username"));
params.add(new BasicNameValuePair("p", "pass"));
HttpPost httpPost = new HttpPost(url);
Log.i("httpPost","success");
try {
httpPost.setEntity(new UrlEncodedFormEntity(params));
Log.i("setEntity", "success");
HttpResponse httpResponse = httpClient.execute(httpPost);
Log.i("execute", "success");
Intent login = new Intent(getApplicationContext(), act2.class);
startActivity(login);
} catch (ClientProtocolException e) {
e.printStackTrace();
Log.i("Exception","ClientProtocolException");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
Log.i("Exception", "UnsupportedEncodingException");
} catch (IOException e) {
e.printStackTrace();
Log.i("Exception", "IOException");
}
return null;
}
}
以下是我在servlet上的doPost方法。
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String name=request.getParameter("u").toString();
String password=request.getParameter("p").toString();
response.getWriter().write(name+password); //working
}
这就是我尝试过的：我在笔记本电脑上制作了一个本地java文件。试图与apache tomcat7联系。它可以联系并获得所需的结果。但是我的android活动无法与服务器联系。它不会将控件传递给act2 Activity。
我正处于学习阶段，所以我尽量让事情变得简单。
附加信息：如果需要，我与无线互联网，家庭网络连接。
logcat输出：
> 05-22 04:42:16.368 21511-23633/com.example.bhavya.sampleintent I/httpPost﹕ success
05-22 04:42:16.369 21511-23633/com.example.bhavya.sampleintent I/setEntity﹕ success
05-22 04:43:19.575 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.1.100:8080 refused
05-22 04:43:19.576 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:183)
05-22 04:43:19.576 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
05-22 04:43:19.576 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
05-22 04:43:19.576 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
05-22 04:43:19.576 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at com.example.bhavya.sampleintent.IntentAct$Login1.doInBackground(IntentAct.java:117)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at com.example.bhavya.sampleintent.IntentAct$Login1.doInBackground(IntentAct.java:99)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at android.os.AsyncTask$2.call(AsyncTask.java:288)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at java.util.concurrent.FutureTask.run(FutureTask.java:237)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ Caused by: java.net.ConnectException: failed to connect to /192.168.1.100 (port 8080): connect failed: ETIMEDOUT (Connection timed out)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at libcore.io.IoBridge.connect(IoBridge.java:124)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
05-22 04:43:19.577 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:456)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at java.net.Socket.connect(Socket.java:882)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ ... 14 more
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ Caused by: android.system.ErrnoException: connect failed: ETIMEDOUT (Connection timed out)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at libcore.io.Posix.connect(Native Method)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:111)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at libcore.io.IoBridge.connectErrno(IoBridge.java:137)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ at libcore.io.IoBridge.connect(IoBridge.java:122)
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent W/System.err﹕ ... 19 more
05-22 04:43:19.578 21511-23633/com.example.bhavya.sampleintent I/Exception﹕ IOException
我尝试使用本地移动热点网络，将其与互联网断开连接。但它不起作用。
注意：我不是在模拟器上工作。我正在进行USB调试。
所以，通过你的机器访问本地主机，但你无法访问Android设备。
这意味着您的Android设备使用2G / 3G或WIFI连接来命中localhost。如果您使用localhost进行连接，那么您必须位于同一网络中，那么只有您可以访问localhost。
但是在模拟器中，你在同一个网络（可能是本地主机网络），这就是它工作的原因。
最后，您的方法可能的解决方案是