在Android的致命异常 [英] fatal exception in android
问题描述
我已经写了简单的客户端服务器套接字编程code作为遵循
MyServer.java
进口java.io.DataInputStream中;
进口java.io.DataOutputStream中;
进口java.io.IOException异常;
进口java.net.ServerSocket的;
进口的java.net.Socket;
公共类要播{ 公共静态无效的主要(字串[] args){
ServerSocket的ServerSocket的= NULL;
Socket套接字= NULL;
DataInputStream以DataInputStream以= NULL;
DataOutputStream类DataOutputStream类= NULL; 尝试{
ServerSocket的=新的ServerSocket(8888);
的System.out.println(听:8888);
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
} 而(真){
尝试{
插座=的ServerSocket.accept();
DataInputStream以=新DataInputStream所(socket.getInputStream());
DataOutputStream类=新的DataOutputStream类(socket.getOutputStream());
的System.out.println(IP:+ socket.getInetAddress());
的System.out.println(消息:+ dataInputStream.readUTF());
dataOutputStream.writeUTF(你好!);
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
最后{
如果(插座!= NULL){
尝试{
socket.close();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
}如果(DataInputStream以!= NULL){
尝试{
dataInputStream.close();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
}如果(DataOutputStream类!= NULL){
尝试{
dataOutputStream.close();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
}
}
}
}}
Android客户端如下:
MyClientActivity.java
包com.exercise.AndroidClient;进口java.io.DataInputStream中;
进口java.io.DataOutputStream中;
进口java.io.IOException异常;
进口的java.net.Socket;
进口的java.net.UnknownHostException;进口android.app.Activity;
进口android.os.Bundle;
进口android.view.View;
进口android.widget.Button;
进口android.widget.EditText;
进口android.widget.TextView;
进口android.os.Bundle;公共类MyClientActivity延伸活动{
EditText上的TextOut;
TextView的textIn; / **当第一次创建活动调用。 * /
@覆盖
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.main); 的TextOut =(EditText上)findViewById(R.id.textout);
按钮buttonSend =(按钮)findViewById(R.id.send);
textIn =(的TextView)findViewById(R.id.textin);
buttonSend.setOnClickListener(buttonSendOnClickListener);
} Button.OnClickListener buttonSendOnClickListener
=新Button.OnClickListener(){@覆盖
公共无效的onClick(查看为arg0){
// TODO自动生成方法存根
Socket套接字= NULL;
DataOutputStream类DataOutputStream类= NULL;
DataInputStream以DataInputStream以= NULL; 尝试{
插座=新的Socket(113.193.42.220,8888);
DataOutputStream类=新的DataOutputStream类(socket.getOutputStream());
DataInputStream以=新DataInputStream所(socket.getInputStream());
dataOutputStream.writeUTF(textOut.getText()的toString());
textIn.setText(dataInputStream.readUTF());
}赶上(UnknownHostException异常五){
// TODO自动生成catch块
e.printStackTrace();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
最后{
如果(插座!= NULL){
尝试{
socket.close();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
} 如果(DataOutputStream类!= NULL){
尝试{
dataOutputStream.close();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
} 如果(DataInputStream以!= NULL){
尝试{
dataInputStream.close();
}赶上(IOException异常五){
// TODO自动生成catch块
e.printStackTrace();
}
}
}
}};
}
main.xml中
<?XML版本=1.0编码=UTF-8&GT?;
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:方向=垂直
机器人:layout_width =FILL_PARENT
机器人:layout_height =FILL_PARENT
>
<的TextView
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=@字符串/你好
/>
<的EditText
机器人:ID =@ + ID /的TextOut
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
/>
<按钮
机器人:ID =@ + ID /发送
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
机器人:文字=发送
/>
<的TextView
机器人:ID =@ + ID / textin
机器人:layout_width =FILL_PARENT
机器人:layout_height =WRAP_CONTENT
/>
< / LinearLayout中>
AndroidManifest.xml中
<?XML版本=1.0编码=UTF-8&GT?;
<清单的xmlns:机器人=http://schemas.android.com/apk/res/android
包=com.exercise.AndroidClient
安卓版code =1
机器人:=的versionName1.0>
<使用许可权的android:NAME =android.permission.INTERNET对/><采用-SDK安卓的minSdkVersion =15/><应用
机器人:图标=@绘制/ ic_launcher
机器人:标签=@字符串/ APP_NAME>
<活动
机器人:MyClientActivityNAME =
机器人:标签=@字符串/ APP_NAME>
&所述;意图滤光器>
<作用机器人:名字=android.intent.action.MAIN/> <类机器人:名字=android.intent.category.LAUNCHER/>
&所述; /意图滤光器>
< /活性GT;
< /用途>< /清单>
我收到FatalException上client.pls执行建议我如何处理这个问题。
我已经尽了PC的IP地址和127.0.0.1还这么我有IP地址或其他任何问题导致FatalException请帮助我。
logcat的是如下
02-21 21:05:48.793:D / gralloc_goldfish(553):没有模拟器检测GPU的仿真。
02-21 21:08:39.794:D / AndroidRuntime(553):关闭VM
02-21 21:08:39.794:W / dalvikvm(553):主题ID = 1:螺纹未捕获的异常(组= 0x409c01f8)退出
02-21 21:08:39.824:E / AndroidRuntime(553):致命异常:主要
02-21 21:08:39.824:E / AndroidRuntime(553):android.os.NetworkOnMainThreadException
02-21 21:08:39.824:E / AndroidRuntime(553):在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
02-21 21:08:39.824:E / AndroidRuntime(553):在libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
02-21 21:08:39.824:E / AndroidRuntime(553):在libcore.io.IoBridge.connectErrno(IoBridge.java:127)
02-21 21:08:39.824:E / AndroidRuntime(553):在libcore.io.IoBridge.connect(IoBridge.java:112)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.net.Socket.startupSocket(Socket.java:566)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.net.Socket.tryAllAddresses(Socket.java:127)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.net.Socket中的<&初始化GT;(Socket.java:177)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.net.Socket中的<&初始化GT;(Socket.java:149)
02-21 21:08:39.824:E / AndroidRuntime(553):在com.exercise.AndroidClient.MyClientActivity $ 1.onClick(MyClientActivity.java:44)
02-21 21:08:39.824:E / AndroidRuntime(553):在android.view.View.performClick(View.java:3511)
02-21 21:08:39.824:E / AndroidRuntime(553):在android.view.View $ PerformClick.run(View.java:14105)
02-21 21:08:39.824:E / AndroidRuntime(553):在android.os.Handler.handleCallback(Handler.java:605)
02-21 21:08:39.824:E / AndroidRuntime(553):在android.os.Handler.dispatchMessage(Handler.java:92)
02-21 21:08:39.824:E / AndroidRuntime(553):在android.os.Looper.loop(Looper.java:137)
02-21 21:08:39.824:E / AndroidRuntime(553):在android.app.ActivityThread.main(ActivityThread.java:4424)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.lang.reflect.Method.invokeNative(本机方法)
02-21 21:08:39.824:E / AndroidRuntime(553):在java.lang.reflect.Method.invoke(Method.java:511)
02-21 21:08:39.824:E / AndroidRuntime(553):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:784)
02-21 21:08:39.824:E / AndroidRuntime(553):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-21 21:08:39.824:E / AndroidRuntime(553):在dalvik.system.NativeStart.main(本机方法)
您是在主应用程序线程acessing网络。这不是在Android的3+允许的。您需要启动单独的线程做接入网络。
您可以使用的AsyncTask
来分隔code,这是acessing网络,另一个发
。
i have written simple client server socket programming code as follow
MyServer.java
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class MyServer {
public static void main(String[] args){
ServerSocket serverSocket = null;
Socket socket = null;
DataInputStream dataInputStream = null;
DataOutputStream dataOutputStream = null;
try {
serverSocket = new ServerSocket(8888);
System.out.println("Listening :8888");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
while(true){
try {
socket = serverSocket.accept();
dataInputStream = new DataInputStream(socket.getInputStream());
dataOutputStream = new DataOutputStream(socket.getOutputStream());
System.out.println("ip: " + socket.getInetAddress());
System.out.println("message: " + dataInputStream.readUTF());
dataOutputStream.writeUTF("Hello!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
if( socket!= null){
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if( dataInputStream!= null){
try {
dataInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if( dataOutputStream!= null){
try {
dataOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}}
android client is as follows
MyClientActivity.java
package com.exercise.AndroidClient;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.os.Bundle;
public class MyClientActivity extends Activity {
EditText textOut;
TextView textIn;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textOut = (EditText)findViewById(R.id.textout);
Button buttonSend = (Button)findViewById(R.id.send);
textIn = (TextView)findViewById(R.id.textin);
buttonSend.setOnClickListener(buttonSendOnClickListener);
}
Button.OnClickListener buttonSendOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Socket socket = null;
DataOutputStream dataOutputStream = null;
DataInputStream dataInputStream = null;
try {
socket = new Socket("113.193.42.220", 8888);
dataOutputStream = new DataOutputStream(socket.getOutputStream());
dataInputStream = new DataInputStream(socket.getInputStream());
dataOutputStream.writeUTF(textOut.getText().toString());
textIn.setText(dataInputStream.readUTF());
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
if (socket != null){
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataOutputStream != null){
try {
dataOutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (dataInputStream != null){
try {
dataInputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}};
}
Main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<EditText
android:id="@+id/textout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/send"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Send"
/>
<TextView
android:id="@+id/textin"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.exercise.AndroidClient"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET"/>
<uses-sdk android:minSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".MyClientActivity"
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>
I am getting FatalException on execution of client.pls suggest me how to handle this. i have tried my pc's ip address and 127.0.0.1 also so do i have any problem with ip address or anything else is causing FatalException pls help me out.
logcat is as follow
02-21 21:05:48.793: D/gralloc_goldfish(553): Emulator without GPU emulation detected.
02-21 21:08:39.794: D/AndroidRuntime(553): Shutting down VM
02-21 21:08:39.794: W/dalvikvm(553): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
02-21 21:08:39.824: E/AndroidRuntime(553): FATAL EXCEPTION: main
02-21 21:08:39.824: E/AndroidRuntime(553): android.os.NetworkOnMainThreadException
02-21 21:08:39.824: E/AndroidRuntime(553): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
02-21 21:08:39.824: E/AndroidRuntime(553): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
02-21 21:08:39.824: E/AndroidRuntime(553): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
02-21 21:08:39.824: E/AndroidRuntime(553): at libcore.io.IoBridge.connect(IoBridge.java:112)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.net.Socket.startupSocket(Socket.java:566)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.net.Socket.tryAllAddresses(Socket.java:127)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.net.Socket.<init>(Socket.java:177)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.net.Socket.<init>(Socket.java:149)
02-21 21:08:39.824: E/AndroidRuntime(553): at com.exercise.AndroidClient.MyClientActivity$1.onClick(MyClientActivity.java:44)
02-21 21:08:39.824: E/AndroidRuntime(553): at android.view.View.performClick(View.java:3511)
02-21 21:08:39.824: E/AndroidRuntime(553): at android.view.View$PerformClick.run(View.java:14105)
02-21 21:08:39.824: E/AndroidRuntime(553): at android.os.Handler.handleCallback(Handler.java:605)
02-21 21:08:39.824: E/AndroidRuntime(553): at android.os.Handler.dispatchMessage(Handler.java:92)
02-21 21:08:39.824: E/AndroidRuntime(553): at android.os.Looper.loop(Looper.java:137)
02-21 21:08:39.824: E/AndroidRuntime(553): at android.app.ActivityThread.main(ActivityThread.java:4424)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.lang.reflect.Method.invokeNative(Native Method)
02-21 21:08:39.824: E/AndroidRuntime(553): at java.lang.reflect.Method.invoke(Method.java:511)
02-21 21:08:39.824: E/AndroidRuntime(553): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-21 21:08:39.824: E/AndroidRuntime(553): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-21 21:08:39.824: E/AndroidRuntime(553): at dalvik.system.NativeStart.main(Native Method)
You are acessing network on main application thread. This is not allowed in Android 3+. You need to start separate thread do access network.
You can use AsyncTask
to separate your code, which is acessing network, to another Thread
.
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