android-handler

 package com.example.handlerex;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {
	private TextView tx;
	private Handler handler=new Handler(){
		public void handleMessage(Message msg) {
			// TODO Auto-generated method stub
			String str=(String) msg.obj;
			tx.setText(str);
		};
	};
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		tx=(TextView)findViewById(R.id.tx);
		MyThread myth=new MyThread();
		myth.start();
	}
	class MyThread extends Thread{
		@Override
		public void run() {
			// TODO Auto-generated method stub
			try {
				Thread.sleep(6000);
				Log.d("hk", "访问到网络");
				String str="我是网络数据";
				Message msg=new Message();
				msg.obj=str;
				handler.sendMessage(msg);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
		}
	}


}