不能在Android項目中使用IRClib

Question

我想在我的Android項目中使用IRClib（http://moepii.sourceforge.net/irclib/javadoc/org/schwering/irc/lib/package-summary.html） 。我在項目的'libs'文件夾中添加了irclib.jar。另外，我已經將該文件添加爲庫，以便它出現在項目的「引用庫」部分中。我還在Android清單中添加了「使用互聯網」權限。

我有以下初步代碼。

package com.shaarad.airc; 

import java.io.IOException; 

import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 
import android.widget.EditText; 
import android.widget.Toast; 

import org.schwering.irc.lib.*; 

public class MainActivity extends Activity { 
EditText text; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    IRCConnection connection=new IRCConnection("irc.freenode.net",6667,6667,"myircpass","shaarad","shaarad","Shaarad"); 
    try { 
     connection.connect(); 
     connection.doJoin("#ubuntu"); 
    } catch (IOException e) { 
     // TODO Auto-generated catch block 
     Toast.makeText(getApplicationContext(), "IOE", Toast.LENGTH_SHORT).show(); 
    } 
    if (connection.isConnected()) { 
     Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_SHORT).show(); 
    }else { 
     Toast.makeText(getApplicationContext(), "Not Connected", Toast.LENGTH_SHORT).show(); 
    } 

    text=(EditText)findViewById(R.id.editText1); 
    text.setText(""); 

} 

@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; 
} 

} 

無論何時通過將它連接爲USB調試模式，我的設備上運行它，該活動會閃爍一秒，並立即關閉！ 這裏是調試輸出：

06-29 12:50:53.211: E/AndroidRuntime(12023): FATAL EXCEPTION: main 
06-29 12:50:53.211: E/AndroidRuntime(12023): java.lang.RuntimeException: Unable to  start activity ComponentInfo{com.shaarad.airc/com.shaarad.airc.MainActivity}: android.os.NetworkOnMainThreadException 
06-29 12:50:53.211: E/AndroidRuntime(12023): at  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2065) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2090) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.app.ActivityThread.access$600(ActivityThread.java:136) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1201) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.os.Handler.dispatchMessage(Handler.java:99) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.os.Looper.loop(Looper.java:137) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.app.ActivityThread.main(ActivityThread.java:4800) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.lang.reflect.Method.invokeNative(Native Method) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.lang.reflect.Method.invoke(Method.java:511) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:798) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:565) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at dalvik.system.NativeStart.main(Native Method) 
06-29 12:50:53.211: E/AndroidRuntime(12023): Caused by: android.os.NetworkOnMainThreadException 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.net.InetAddress.getAllByName(InetAddress.java:214) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.net.Socket.tryAllAddresses(Socket.java:113) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.net.Socket.<init>(Socket.java:182) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at java.net.Socket.<init>(Socket.java:154) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at org.schwering.irc.lib.IRCConnection.connect(IRCConnection.java:295) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at com.shaarad.airc.MainActivity.onCreate(MainActivity.java:22) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.app.Activity.performCreate(Activity.java:5008) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 
06-29 12:50:53.211: E/AndroidRuntime(12023): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2029) 
06-29 12:50:53.211: E/AndroidRuntime(12023): ... 11 more 

Answer 1

你不能在主線程上執行網絡操作，您應該執行使用一個單獨的線程，這些類型的活動（如使用AsyncTask）。

Answer 2

作爲例外已明確說明，Caused by: android.os.NetworkOnMainThreadException您不應該使用主線程進行網絡通信。如果您必須使用以下代碼進行操作。

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

StrictMode.setThreadPolicy(policy); 

但是不鼓勵使用這種方法，因爲它會導致ANR，活動無響應。所以你最好使用異步任務方法或服務類。