Android應用程序在重新啓動時崩潰java.net.UnknownHostException：無法解析主機

Question

當我重新啓動我的設備時，它崩潰了我的應用程序，它很難調試，我搜索我說它說增加我在我的互聯網許可清單我不知道該怎麼做，任何人都可以請指導我。

02-24 17:37:05.750: I/System.out(5201): onErrorResponse:com.android.volley.NoConnectionError: java.net.UnknownHostException: Unable to resolve host "eventiapp.com": No address associated with hostname 
    02-24 17:37:05.750: W/System.err(5201): com.android.volley.NoConnectionError: java.net.UnknownHostException: Unable to resolve host "eventiapp.com": No address associated with hostname 
    02-24 17:37:05.750: W/System.err(5201):  at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:133) 
    02-24 17:37:05.750: W/System.err(5201):  at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:105) 
    02-24 17:37:05.750: W/System.err(5201): Caused by: java.net.UnknownHostException: Unable to resolve host "eventiapp.com": No address associated with hostname 
    02-24 17:37:05.755: W/System.err(5201):  at java.net.InetAddress.lookupHostByName(InetAddress.java:424) 
    02-24 17:37:05.755: W/System.err(5201):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
    02-24 17:37:05.755: W/System.err(5201):  at java.net.InetAddress.getAllByName(InetAddress.java:214) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:310) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80) 
    02-24 17:37:05.755: W/System.err(5201):  at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188) 
    02-24 17:37:05.755: W/System.err(5201):  at com.android.volley.toolbox.HurlStack.addBodyIfExists(HurlStack.java:227) 
    02-24 17:37:05.755: W/System.err(5201):  at com.android.volley.toolbox.HurlStack.setConnectionParametersForRequest(HurlStack.java:210) 
    02-24 17:37:05.755: W/System.err(5201):  at com.android.volley.toolbox.HurlStack.performRequest(HurlStack.java:106) 
    02-24 17:37:05.755: W/System.err(5201):  at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:93) 
    02-24 17:37:05.755: W/System.err(5201):  ... 1 more 
    02-24 17:37:05.755: W/System.err(5201): Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname) 
    02-24 17:37:05.760: W/System.err(5201):  at libcore.io.Posix.getaddrinfo(Native Method) 
    02-24 17:37:05.770: W/System.err(5201):  at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:55) 
    02-24 17:37:05.770: W/System.err(5201):  at java.net.InetAddress.lookupHostByName(InetAddress.java:405) 
    02-24 17:37:05.770: W/System.err(5201):  ... 18 more 
    02-24 17:37:05.770: W/System.err(5201): Caused by: libcore.io.ErrnoException: getaddrinfo failed: ENETUNREACH (Network is unreachable) 
    02-24 17:37:05.775: W/System.err(5201):  ... 21 more## 

Answer 1

你檢查網絡連接之前創建一個HTTP請求，因爲這樣：

ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
NetworkInfo netInfo = cm.getActiveNetworkInfo(); 
return netInfo != null && netInfo.isConnectedOrConnecting();