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  1. ,
    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.

  2. ,

    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);
    

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, 1 year ago
This exception has no message.
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This exception has no message.
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This exception has no message.
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This exception has no message.
via Stack Overflow by Sadragos
, 2 years ago
This exception has no message.
android.os.NetworkOnMainThreadException: 	at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)	at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:110)	at libcore.io.IoBridge.connectErrno(IoBridge.java:137)	at libcore.io.IoBridge.connect(IoBridge.java:122)	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:452)	at java.net.Socket.connect(Socket.java:884)	at com.android.okhttp.internal.Platform.connectSocket(Platform.java:117)	at com.android.okhttp.internal.http.SocketConnector.connectRawSocket(SocketConnector.java:160)	at com.android.okhttp.internal.http.SocketConnector.connectCleartext(SocketConnector.java:67)	at com.android.okhttp.Connection.connect(Connection.java:152)	at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:185)	at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:128)	at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:341)	at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330)	at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248)	at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:433)	at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:114)	at com.example.neil.access_control.MainActivity.getBitmapFromURL(MainActivity.java:71)	at com.example.neil.access_control.MainActivity$1.onClick(MainActivity.java:54)	at android.view.View.performClick(View.java:5198)	at android.view.View$PerformClick.run(View.java:21147)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5417)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)