android使用handler ui线程和子线程通讯更新ui示例

package com.act262.sockettx;

import android.app.activity;
import android.os.bundle;
import android.os.handler;
import android.os.message;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.edittext;
import android.widget.textview;

/**
 * 可以在其他线程中获取view类的数据,但是不能修改或者设置view类的数据
 *
 */
public class main extends activity {

    textview result = null;
    edittext get = null;
    button update = null;
    handler handler;

    public void oncreate(bundle bundle) {
        super.oncreate(bundle);
        setcontentview(r.layout.main);
        result = (textview) findviewbyid(r.id.result);
        update = (button) findviewbyid(r.id.update);
        get = (edittext) findviewbyid(r.id.get);

        handler = new handler() {
            public void handlemessage(message msg) {
                if (msg.what == 1) {
                    result.settext("after update ui "
                            + msg.getdata().getstring("data")
                            + "  \nman thread : "
                            + thread.currentthread().getname());
                }
            }
        };

        result.settext("before update ui  main thread : "
                + thread.currentthread().tostring());

        update.setonclicklistener(new onclicklistener() {

            @override
            public void onclick(view v) {
                // todo auto-generated method stub
                new mythread("my thread").start();
            }
        });

    }

    class mythread extends thread {
        public mythread(string name) {
            super(name);
        }

        @override
        public void run() {
            // 发送不带数据的消息
            // handler.sendemptymessage(1);

            // 发送附带数据的消息
            message msg = new message();
            bundle data = new bundle();
            data.putstring("data", get.gettext().tostring() + " my thread:  "
                    + thread.currentthread().getname());
            msg.setdata(data);
            msg.what = 1;
            handler.sendmessage(msg);
        }
    }
}