Question

 java.net.UnknownHostException: Unable to resolve host "graph.facebook.com": No address associated with hostname
at java.net.InetAddress.lookupHostByName(InetAddress.java:400)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
at java.net.InetAddress.getAllByName(InetAddress.java:220)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:71)
at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
    at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.makeSslConnection(HttpsURLConnectionImpl.java:460)
at libcore.net.http.HttpsURLConnectionImpl$HttpsEngine.connect(HttpsURLConnectionImpl.java:441)
at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
at libcore.net.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:270)
    at com.facebook.android.Util.openUrl(Util.java:215)
at com.facebook.android.Facebook.request(Facebook.java:751)
at com.facebook.android.Facebook.request(Facebook.java:688)
at com.nammari.FinalActivity$1.onClick(FinalActivity.java:62)
at android.view.View.performClick(View.java:3511)
at android.view.View$PerformClick.run(View.java:14105)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
    at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)

Answer 1

在您的清单文件中，添加以下权限：

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

Answer 2

我认为Raghav Sood对以下问题的回答会有所帮助。他描述了你得到这个例外的3个原因

Error on post message to the facebook wall in android 4.0.3

Answer 3

尝试重新启动模拟器。我也得到了同样的错误。我在2天前工作了，今天我发现了一个应用程序，并且在查看上面提到的解决方案之后得到了上述错误Error on post message to the facebook wall in android 4.0.3我把一切都正确了。

最后我刚刚杀了我的模拟器并重新启动并且错误消失了，我认为陈旧的会话会导致问题。

Answer 4

您必须重置网络

我希望这对你有用：

点击开始=＆gt;运行，输入CMD，然后按确定。
将其复制并粘贴到命令提示符中：
netsh winsock重置目录
按Enter键
然后将其复制并粘贴到：
netsh int ip reset reset.log
按Enter键。
完成后重新启动计算机。

https://productforums.google.com/forum/#!topic/chrome/oCUYZsG8VJU

尝试将消息发布到Facebook时出现UknownHostException

4 个答案: