Android 编程下的计时器代码

同样，为了防止用户恶意的频繁发送激活码，应用中需要对用户发送激活码的时间间隔进行限制，这时就需要用到倒计时器了，大概流程是这样的：页面初始化的时候，按钮为可点击状态，用户在点击“发送激活码”后按钮变为不可点击状态，同时按钮上的文字变为倒计时状态，倒计时结束后，按钮变为可点击状态，文字变为“发送激活码”。具体逻辑看下面的代码：

package cn.sunzn.countdown;

import android.app.activity;
import android.os.bundle;
import android.os.countdowntimer;
import android.view.menu;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;

public class mainactivity extends activity implements onclicklistener {

    private timecount timecount;

    private button btn_reget_captcha;

    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        setcontentview(r.layout.activity_main);
        init();
    }

    private void init() {
        initview();
        initdata();
    }

    private void initdata() {
        timecount = new timecount(60000, 1000);
    }

    private void initview() {
        btn_reget_captcha = (button) findviewbyid(r.id.btn_reget_captcha);
        btn_reget_captcha.setonclicklistener(this);
    }

    public boolean oncreateoptionsmenu(menu menu) {
        getmenuinflater().inflate(r.menu.main, menu);
        return true;
    }

    public void onclick(view v) {
        int id = v.getid();
        switch (id) {
        case r.id.btn_reget_captcha:
            if (btn_reget_captcha.isclickable()) {
                // todo run your logic that you want to do
                timecount.start();
            }
            break;

        default:
            break;
        }
    }

    class timecount extends countdowntimer {
        public timecount(long millisinfuture, long countdowninterval) {
            super(millisinfuture, countdowninterval);
        }

        public void onfinish() {
            btn_reget_captcha.settext("发送激活码");
            btn_reget_captcha.setclickable(true);
        }

        public void ontick(long millisuntilfinished) {
            btn_reget_captcha.setclickable(false);
            btn_reget_captcha.settext("在" + millisuntilfinished / 1000 + "秒后点击重发激活码");
        }
    }

}

最后，附上工程代码：countdown