Android 抢购类倒计时实现 （包括天数，小时，分钟，秒）
16lz
2021-01-23
Android 抢购类倒计时实现，本文注重实现功能，代码里有注释，实现起来比较简单，所有不做过多解释。
先上图：
实现倒计时可采用Message + Handler 来实现，具体实现如下：
MainActivity的代码如下：
package com.example.android_countdown;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.view.View;import android.widget.RelativeLayout;import android.widget.TextView;/** * 抢购倒计时 * * @author shihao * */public class MainActivity extends Activity {private RelativeLayout countDown;// 倒计时private TextView daysTv, hoursTv, minutesTv, secondsTv;private long mDay = 10;private long mHour = 10;private long mMin = 30;private long mSecond = 00;// 天 ,小时,分钟,秒private boolean isRun = true;private Handler timeHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);if (msg.what==1) {computeTime();daysTv.setText(mDay+"");hoursTv.setText(mHour+"");minutesTv.setText(mMin+"");secondsTv.setText(mSecond+"");if (mDay==0&&mHour==0&&mMin==0&&mSecond==0) {countDown.setVisibility(View.GONE);}}}};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);countDown = (RelativeLayout) findViewById(R.id.countdown_layout);daysTv = (TextView) findViewById(R.id.days_tv);hoursTv = (TextView) findViewById(R.id.hours_tv);minutesTv = (TextView) findViewById(R.id.minutes_tv);secondsTv = (TextView) findViewById(R.id.seconds_tv);startRun();}/** * 开启倒计时 */private void startRun() {new Thread(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubwhile (isRun) {try {Thread.sleep(1000); // sleep 1000msMessage message = Message.obtain();message.what = 1;timeHandler.sendMessage(message);} catch (Exception e) {e.printStackTrace();}}}}).start();}/** * 倒计时计算 */private void computeTime() {mSecond--;if (mSecond < 0) {mMin--;mSecond = 59;if (mMin < 0) {mMin = 59;mHour--;if (mHour < 0) {// 倒计时结束mHour = 23;mDay--;}}}}}activity_main.xml代码如下：
项目下载地址：http://download.csdn.net/detail/shr957250701/8172137
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