Android获取验证码倒计时

package com.example.countdowntest;import android.app.Activity;import android.os.Bundle;import android.os.CountDownTimer;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity {private Button bt_1;private TextView tv_1;private TimeCount time;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);time = new TimeCount(6000, 1000);// 构造CountDownTimer对象bt_1 = (Button) findViewById(R.id.bt_1);tv_1 = (TextView) findViewById(R.id.tv_1);bt_1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View view) {time.start();// 开始计时}});}class TimeCount extends CountDownTimer {public TimeCount(long millisInFuture, long countDownInterval) {super(millisInFuture, countDownInterval);// 参数依次为总时长,和计时的时间间隔}@Overridepublic void onFinish() {// 计时完毕时触发bt_1.setText("重新验证");bt_1.setClickable(true);}@Overridepublic void onTick(long millisUntilFinished) {// 计时过程显示bt_1.setClickable(false);tv_1.setText(millisUntilFinished / 1000 + "");}}}
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