WWW : World Wide Wonsama

Main 에서 네트워크 작업을 수행하면 안됨 !! AsyncTask 를 사용하여 작업을 수행해야 됨

This exception is thrown when an application attempts to perform a networking operation on its main thread. Run your code in AsyncTask:

출처 :

http://stackoverflow.com/questions/6343166/how-to-fix-android-os-networkonmainthreadexception

Thread.sleep(Long.MAX_VALUE);

package kr.co.jwsnt.libs.test;


public class TeNotifyRecur{
	
	/*
	 * 결과
	 * 
	 */

	public static void main(String[] args){
		new TeNotifyRecur();
	}
	
	class TeThread extends Thread{
		
		private TeNotifyRecur p;
		
		public TeThread(TeNotifyRecur p){
			this.p = p;
		}
		
		@Override
		public void run() {
			try {
				Thread.sleep(2000);
				p.reconnect();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}
	
	TeNotifyRecur(){

		System.out.println("start");
		
		connect();
		
		while(true){
			try {
				Thread.sleep(Long.MAX_VALUE);
			} catch (InterruptedException e) {
				break;
			}
		}
		System.out.println("end");
		
	}
	
	private void connect()
	{
		Object obj = new Object();
		System.out.println( "create : " + obj.hashCode() );

		try{
			Thread t = new TeThread(this);
			t.setDaemon(true);
			t.start();
			startWait();
		}catch(Exception e){
			System.out.println( "conn : " + e.toString() );
		}finally{
			close(obj);	
		}
	}
	
	private void close(Object obj){
		System.out.println( "close : " + obj.hashCode() );
		obj = null;
	}
	
	public synchronized void reconnect(){
		notify();
		connect();
	}
	
	public synchronized void startWait() throws InterruptedException{
		wait();
	}
}

public class TeParent {

	class TeChild implements Runnable{
		TeParent p;
		TeChild(TeParent p){
			this.p = p;
		}
		
		@Override
		public void run() {
			try {
				System.out.println("run-1");
				Thread.sleep(3000);
				System.out.println("run-2");
				this.p.waitEnd();
				System.out.println("run-3");
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
	
	public synchronized void waitStart() throws InterruptedException{
		System.out.println("waitStart-1");
		wait();
		System.out.println("waitStart-2");
	}
	
	public synchronized void waitEnd(){
		System.out.println("waitEnd-1");
		notify();
		System.out.println("waitEnd-2");
	}
	
	TeParent(){
		try{
			System.out.println("job-1");
			new Thread(new TeChild(this)).start();;
			System.out.println("job-2");
			waitStart();
			System.out.println("job-3");
		}catch(Exception e){
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args){
		new TeParent();
	}
}