Java.net.SocketException: Android 权限被拒绝

Question

我创建了一个安卓应用程序来链接到“www.google.com”。但是我总是收到这样的异常：

07-20 16:50:31.137: W/System.err(19007): java.net.SocketException: Permission denied
07-20 16:50:31.137: W/System.err(19007):    at org.apache.harmony.luni.platform.OSNetworkSystem.socket(Native Method)
07-20 16:50:31.137: W/System.err(19007):    at dalvik.system.BlockGuard$WrappedNetworkSystem.socket(BlockGuard.java:335)
07-20 16:50:31.137: W/System.err(19007):    at org.apache.harmony.luni.net.PlainSocketImpl.create(PlainSocketImpl.java:219)
07-20 16:50:31.137: W/System.err(19007):    at java.net.Socket.checkOpenAndCreate(Socket.java:832)
07-20 16:50:31.137: W/System.err(19007):    at java.net.Socket.connect(Socket.java:978)
07-20 16:50:31.137: W/System.err(19007):    at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
07-20 16:50:31.137: W/System.err(19007):    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:143)
07-20 16:50:31.137: W/System.err(19007):    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
07-20 16:50:31.147: W/System.err(19007):    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
07-20 16:50:31.147: W/System.err(19007):    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:359)
07-20 16:50:31.147: W/System.err(19007):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
07-20 16:50:31.147: W/System.err(19007):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
07-20 16:50:31.147: W/System.err(19007):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
07-20 16:50:31.147: W/System.err(19007):    at com.xenos.httpclienttest.HttpClientTest$1.onClick(HttpClientTest.java:60)
07-20 16:50:31.147: W/System.err(19007):    at android.view.View.performClick(View.java:2532)
07-20 16:50:31.147: W/System.err(19007):    at android.view.View$PerformClick.run(View.java:9291)
07-20 16:50:31.147: W/System.err(19007):    at android.os.Handler.handleCallback(Handler.java:587)
07-20 16:50:31.147: W/System.err(19007):    at android.os.Handler.dispatchMessage(Handler.java:92)
07-20 16:50:31.147: W/System.err(19007):    at android.os.Looper.loop(Looper.java:150)
07-20 16:50:31.147: W/System.err(19007):    at android.app.ActivityThread.main(ActivityThread.java:4293)
07-20 16:50:31.147: W/System.err(19007):    at java.lang.reflect.Method.invokeNative(Native Method)
07-20 16:50:31.147: W/System.err(19007):    at java.lang.reflect.Method.invoke(Method.java:507)
07-20 16:50:31.147: W/System.err(19007):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
07-20 16:50:31.147: W/System.err(19007):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
07-20 16:50:31.147: W/System.err(19007):    at dalvik.system.NativeStart.main(Native Method)

我还将权限添加到Manifest.xml中。

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.xenos.study.httpclienttest"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET"/>
<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:name=".HttpClient"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

这里是完整的代码：

public class HttpClientTest extends Activity {


private HttpClient httpClient ;
private HttpGet httpGet ;
private HttpResponse httpResponse ;
private HttpEntity httpEntity ;

private BufferedReader br ;
private Button link ;
private EditText show ;

private String path = "http://74.125.71.104";

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);


    link = (Button) findViewById(R.id.link);
    show = (EditText) findViewById(R.id.show);


    httpClient = new DefaultHttpClient () ;
    httpGet = new HttpGet(path);



    link.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            try {
                httpResponse = httpClient.execute(httpGet);
                httpEntity = httpResponse.getEntity();
                br = new BufferedReader(new InputStreamReader(httpEntity.getContent()));

                String str = null ;
                while ((str = br.readLine())!=null) {

                }
            } catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
    });

    }
  }

这让我感到沮丧，感谢你的帮助。

- Xenos

---

请查看以下链接：http://stackoverflow.com/questions/11341032/android-bump-api-network-on-main-thread-exception - Tomislav Novoselec

清理你的项目并重新构建。 - waqaslam

Answer 1

更新（来自评论） 您必须添加

。

<uses-permission android:name="android.permission.INTERNET"/>

请在您的manifest文件中添加 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 然后进行检查。

- Siddhesh

---

不行，他更愿意使用 <uses-permission android:name="android.permission.INTERNET"/>。 - TOUDIdel

Answer 2

SocketException：它可能发生在各种情况下。要么是服务器端关闭了连接，要么是客户端关闭了连接。

- Divyansh Jain

Answer 3

请检查您的类名，因为

类名是 public class HttpClientTest extends Activity {

但是您在Manifest.xml中的活动是

android:name=".HttpClient"

我认为你的活动名称应该改为“HttpClientTest”，因为我已经测试了你的代码。

- jiw_cs

---

是的，这会带来另一个问题，但它不重要。在我清理项目后，它可以工作。谢谢你的帮助。 - Xenos