android.os.NetworkOnMainThreadException: This exception has no message.

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Samebug tips

,
via Stack Overflow by Razgriz

Happens when you make a network call on the main UI thread of the Android application which results in a UI freeze until the network call is complete and the response is received. Instead, execute the network calls in the background: use AsyncTask.

,

An alternative for just getting rid of the Exception is use StrictMode.ThreadPolicy to force execute on main thread.

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);

Solutions on the web

via GitHub by kwent
, 2 years ago
This exception has no message.
via Google Groups by 三木健太郎, 6 months ago
This exception has no message.
via Google Groups by Sanae, 6 months ago
via Google Groups by giozh via StackOverflow, 3 weeks ago
via GitHub by feiyu1001
, 1 year ago
This exception has no message.
via GitHub by T7777
, 2 years ago
This exception has no message.
android.os.NetworkOnMainThreadException:
at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
at java.net.InetAddress.getAllByName(InetAddress.java:220)
at libcore.net.http.HttpConnection.(HttpConnection.java:71)
at libcore.net.http.HttpConnection.(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:432)
at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188)
at libcore.net.http.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:280)
at com.gc.android.market.api.Tools.postUrl(Tools.java:55)
at com.gc.android.market.api.MarketSession.login(MarketSession.java:140)
at com.gc.android.market.api.MarketSession.login(MarketSession.java:127)
at com.chocopepper.testmarket.TestmarketActivity.onCreate(TestmarketActivity.java:87)
at android.app.Activity.performCreate(Activity.java:4465)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)

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