如何在 android 上下文中使用 jersey 客户端 api？

Question

我正在尝试通过 jersey 客户端 api 使用我的网络服务。 这是我的网络服务：

@Path("/myresource")
@Component
@Scope("request")
public class MyResource {

@GET
@Produces(MediaType.TEXT_PLAIN)
@Path("test")
public String test(){
     return "test";
} 

}

这是我的客户：

public class MyClient {
public static void main(String[] args) {
 System.out.println(Client.create().resource( "http://testwebservice.de:8080/CompetenceNetwork/api/myresource/test" ).get( String.class ) );

}

}

一切正常。现在我在一个 android 类中尝试这个：

 TextView tv;
 public void onCreate(Bundle savedInstanceState)
 {
      super.onCreate(savedInstanceState);
      tv = new TextView(this);
      Client c = Client.create();
      WebResource r = c.resource("http://testwebservice.de:8080/CompetenceNetwork/api/myresource/test");
      String s = r.get(String.class);
      tv.setText(s);
      setContentView(tv);
   }

什么也没发生，几分钟后我得到以下异常：

11-04 17:13:27.382: ERROR/AndroidRuntime(231): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tablayout/com.example.tablayout.MyLogin}: com.sun.jersey.api.client.ClientHandlerException: java.net.SocketException: The operation timed out
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2335)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:648)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.widget.TabHost.setCurrentTab(TabHost.java:320)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:379)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.View.performClick(View.java:2364)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.View.onTouchEvent(View.java:4179)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.View.dispatchTouchEvent(View.java:3709)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:852)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.os.Handler.dispatchMessage(Handler.java:99)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.os.Looper.loop(Looper.java:123)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.ActivityThread.main(ActivityThread.java:4363)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at java.lang.reflect.Method.invokeNative(Native Method)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at java.lang.reflect.Method.invoke(Method.java:521)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at dalvik.system.NativeStart.main(Native Method)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): Caused by: com.sun.jersey.api.client.ClientHandlerException: java.net.SocketException: The operation timed out
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:131)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.sun.jersey.api.client.Client.handle(Client.java:616)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.sun.jersey.api.client.WebResource.handle(WebResource.java:559)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.sun.jersey.api.client.WebResource.get(WebResource.java:182)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at com.example.tablayout.MyLogin.onCreate(MyLogin.java:94)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): ... 31 more
11-04 17:13:27.382: ERROR/AndroidRuntime(231): Caused by: java.net.SocketException: The operation timed out
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.platform.OSNetworkSystem.connectSocketImpl(Native Method)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.platform.OSNetworkSystem.connect(OSNetworkSystem.java:114)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:245)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:535)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at java.net.Socket.connect(Socket.java:1054)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:62)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionManager$ConnectionPool.getHttpConnection(HttpConnectionManager.java:145)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionManager.getConnection(HttpConnectionManager.java:67)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection.getHTTPConnection(HttpURLConnection.java:821)
11-04 17:13:27.382: ERROR/AndroidRuntime(231): at org.apache.harmony.luni.internal.net.www.protocol.ht

我正在使用目标 GoogleAPI 7 和以下 jar：

jersey-bundle-1.4.jar jsr311-api-1.1.jar junit-4.5.jar

有没有人想办法解决这个问题？

问候 克里斯汀·鲍尔斯

Answer 1

您是否在 manifest.xml 中设置了适当的权限，以便您的应用可以使用互联网？我不知道确切的代码，但如果你不知道它应该很容易谷歌它。确保将其放在与应用程序相同的级别，而不是在其中，如果将其放在应用程序标记之前似乎效果更好。

Answer 2

放 在应用程序节点之外的 manifest.xml 中

Answer 3

在我看来，您没有在 android 应用程序中设置您的 INTERNET 权限。 没有它，android VM 会阻止您在手机外进行通信。