Why I get this Error and my app stop. I try to change all domains and all domains are available. The Mobile Phone have Internet connection and in the Manifest I don't forget the Internet premission. I don't know what I forget. I think it's because I click on the Button and I think isNetworkAvailable() boolean didn't support the View v.
Line:34 : socket.connect(new InetSocketAddress("example.com", 80), 2000);
Line:97 : if(isNetworkAvailable()) {
public void setnewuser(View v){
EditText benutzername = (EditText) findViewById(R.id.benutzername);
TextView error = (TextView) findViewById(R.id.error);
if (benutzername.getText().toString().trim() != "") {
String newusid = null;
URL url = null;
if(isNetworkAvailable()) {
try {
url = new URL(gamehost + "/newuser.php");
String readLine = null;
String sResult = null;
BufferedReader buffReader = new BufferedReader(new InputStreamReader(url.openStream()));
while ((readLine = buffReader.readLine()) != null) {
if (sResult == null) {
sResult = readLine;
} else {
sResult = sResult + readLine;
}
}
newusid = sResult;
} catch (MalformedURLException me) {
me.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
String userid = newusid;
if(userid != "") {
editor.putString("username", benutzername.getText().toString().trim());
editor.commit();
editor.putString("userid", userid);
editor.commit();
startActivity(new Intent(Setname.this, Game.class));
finish();
}else{
error.setText(R.string.needinternetforregist);
}
} else {
error.setText(R.string.etwaseingeben);
}
The isNetworkAvailabe() boolean:
public boolean isNetworkAvailable() {
try (Socket socket = new Socket()) {
socket.connect(new InetSocketAddress("example.com", 80), 2000);
return true;
} catch (IOException e) {
// Either we have a timeout or unreachable host or failed DNS lookup
System.out.println(e);
return false;
}
}
Logcat:
Process: de.gamer.myapp, PID: 13895
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:6213)
at android.widget.TextView.performClick(TextView.java:11074)
at android.view.View$PerformClick.run(View.java:23645)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6692)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:6213)
at android.widget.TextView.performClick(TextView.java:11074)
at android.view.View$PerformClick.run(View.java:23645)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6692)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)
Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)
at java.net.Inet6AddressImpl.lookupHostByName(Inet6AddressImpl.java:86)
at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:74)
at java.net.InetAddress.getByName(InetAddress.java:708)
at java.net.InetSocketAddress.<init>(InetSocketAddress.java:232)
at de.gamer.Setname.isNetworkAvailable(Setname.java:34)
at de.gamer.Setname.setnewuser(Setname.java:97)
Caused by: android.os.NetworkOnMainThreadException
That means you are trying to connect to the internet in the main thread.
You have to use an AsyncTask