whenever I open a socket in android, the program immediately force closes. Here's the code:
package com.bensherman.acc;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
Socket socket = new Socket("192.168.43.253", 4452);
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Here's my manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.bensherman.acc"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="14" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.bensherman.acc.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Here's the log:
05-20 19:26:59.539: E/Trace(26558): error opening trace file: No such file or directory (2)
05-20 19:26:59.649: D/AndroidRuntime(26558): Shutting down VM
05-20 19:26:59.649: W/dalvikvm(26558): threadid=1: thread exiting with uncaught exception (group=0x2b545300)
05-20 19:26:59.669: E/AndroidRuntime(26558): FATAL EXCEPTION: main
05-20 19:26:59.669: E/AndroidRuntime(26558): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bensherman.acc/com.bensherman.acc.MainActivity}: android.os.NetworkOnMainThreadException
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2190)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2215)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.ActivityThread.access$600(ActivityThread.java:145)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1211)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.os.Handler.dispatchMessage(Handler.java:99)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.os.Looper.loop(Looper.java:137)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.ActivityThread.main(ActivityThread.java:4978)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.lang.reflect.Method.invokeNative(Native Method)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.lang.reflect.Method.invoke(Method.java:511)
05-20 19:26:59.669: E/AndroidRuntime(26558): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
05-20 19:26:59.669: E/AndroidRuntime(26558): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
05-20 19:26:59.669: E/AndroidRuntime(26558): at dalvik.system.NativeStart.main(Native Method)
05-20 19:26:59.669: E/AndroidRuntime(26558): Caused by: android.os.NetworkOnMainThreadException
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
05-20 19:26:59.669: E/AndroidRuntime(26558): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
05-20 19:26:59.669: E/AndroidRuntime(26558): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
05-20 19:26:59.669: E/AndroidRuntime(26558): at libcore.io.IoBridge.connect(IoBridge.java:112)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.net.Socket.startupSocket(Socket.java:566)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.net.Socket.tryAllAddresses(Socket.java:127)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.net.Socket.<init>(Socket.java:177)
05-20 19:26:59.669: E/AndroidRuntime(26558): at java.net.Socket.<init>(Socket.java:149)
05-20 19:26:59.669: E/AndroidRuntime(26558): at com.bensherman.acc.MainActivity.onCreate(MainActivity.java:22)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.Activity.performCreate(Activity.java:5008)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
05-20 19:26:59.669: E/AndroidRuntime(26558): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
05-20 19:26:59.669: E/AndroidRuntime(26558): ... 11 more
Does anyone have an idea what's the problem? It isn't a problem if I say Socket socket = new Socket(). I have a server running on my computer, although both the laptop and development device are connected via a phone running wifi tether.
