I have a web service running in my computer and I want to access it from an Android app. It fails always when getResponseCode is done, here is the code:
try {
url = new URL("http://192.168.1.101:8080");
Log.d(TAG, "url initialization");
} catch (MalformedURLException e) {
e.printStackTrace();
Log.d(TAG, "url initialization failed");
}
try {
conn = (HttpURLConnection) url.openConnection();
Log.d(TAG, "http connection");
} catch (IOException e) {
e.printStackTrace();
Log.d(TAG, "http connection failed");
}
try {
conn.setRequestMethod("GET");
Log.d(TAG, "get request");
} catch (ProtocolException e) {
Log.d(TAG, "get request failed");
e.printStackTrace();
}
try {
conn.getResponseCode();
Log.d(TAG, "print response");
} catch (IOException e) {
Log.d(TAG, "print response failed");
e.printStackTrace();
}
The error I am getting constantly is this:
java.lang.RuntimeException: Unable to start activity ComponentInfo{es.my.app/es.my.app.MainActivity}: android.os.NetworkOnMainThreadException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: 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:437)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:388)
at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:501)
at es.my.app.MainActivity.onCreate(MainActivity.java:60)
Previously I was getting an error because of the permissions and I solved it adding in the manifest INTERNET permission. But this error is not even catched by the try-catch...
