Question

android 倒计时器 设计

android中如何实现 点击一个button然后出现自定义倒计时时间的窗口或小插件，确定后开始倒计时，倒计时的数字任然显示在button上

Answer 1

有三种实现方式：

第一种：通过Timer与TimerTask结合的方式进行实现
第二种：通过Handler与Message方式进行实现
第三种：通过CountdownTimer进行实现
示例
第一种：
timer.schedule(task, 1000, 1000); // timeTask ，一秒执行一次，
TimerTask task = new TimerTask() {
@Override
public void run() {
}
}
第二种：
handler.sendMessageDelayed(message, 1000); //1秒后发送消息
final Handler handler = new Handler(){
public void handleMessage(Message msg){ // handle message
switch (msg.what) {
case 1:
recLen--;
if(recLen > 0){ //如果倒计时没到
Message message = handler.obtainMessage(1);
handler.sendMessageDelayed(message, 1000); // 1秒后发送消息
}
}
super.handleMessage(msg);
}
};
第三种：
new CountdownTimer(30000, 1000) { //30秒倒计时，没秒执行一次
public void onTick(long millisUntilFinished) { //每秒执行一次进该方法
mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
}
public void onFinish() { //倒计时结束。
mTextField.setText("done!");
}
}.start();

Answer 2

用timer做一个 计时操作

追问

就是不会呀 求源码或者链接

追答

http://www.cnblogs.com/xzf158/archive/2009/09/04/1560042.html

Answer 3

最近做了一个，给你贴代码

Timer timer = new Timer();
static int hour = 0;
static int minute = 0;
static int second = 0;
//给变量赋值（要计时多久）
timerTask = new TimerTask() {
@Override
public void run() {
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};
timer.schedule(timerTask, 0, 1000);

final Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
if (hour == 0) {// /////////////////////////////////////////
if (minute == 0) {
if (second == 0) {// ʱ�䵽
timeView.setText("Time out !");
if (timer != null) {
timer.cancel();
timer = null;
}
if (timerTask != null) {
timerTask = null;
}
} else {// 00:30,00:08
second--;
if (second >= 10) {
timeView.setText("0" + hour + "小时" + "0"
+ minute + "分" + second);
} else {
timeView.setText("0" + hour + "小时" + "0"
+ minute + "分0" + second);
}
}
} else {// minute!=0,33:00->32:59
if (second == 0) {
second = 59;
minute--;
if (minute >= 10) {// 33:30
timeView.setText("0" + hour + "小时" + minute
+ "分" + second);
} else {// 06:30
timeView.setText("0" + hour + "小时" + "0"
+ minute + "分" + second);
}
} else {// 32:30->32:29
second--;
if (second >= 10) {
if (minute >= 10) {
timeView.setText("0" + hour + "小时" + minute
+ ":" + second);
} else {// 09:30
timeView.setText("0" + hour + "小时" + "0"
+ minute + "分" + second);
}
} else {// 12:30
if (minute >= 10) {
timeView.setText("0" + hour + "小时" + minute
+ "分0" + second);
} else {// 08:30
timeView.setText("0" + hour + "小时" + "0"
+ minute + "分0" + second);
}
}
}
}
}

// hour>0
else {
if (minute == 0) {// hour>0,minute=0
if (second == 0) {
minute = 59;
second = 59;
hour--;
if (hour >= 10) {
if (second >= 10) {
timeView.setText(hour + "小时" + minute + "分"
+ second);
} else {
timeView.setText(hour + "小时" + minute + "分0"
+ second);
}
} else {
if (second >= 10) {
timeView.setText("0" + hour + "小时" + minute
+ "分" + second);
} else {
timeView.setText("0" + hour + "小时" + minute
+ "分0" + second);
}
}
} else {
second--;
if (hour >= 10) {
if (second >= 10) {
timeView.setText(hour + "小时0" + minute + "分"
+ second);
} else {
timeView.setText(hour + "小时0" + minute
+ "分0" + second);
}
} else {
if (second >= 10) {
timeView.setText("0" + hour + "小时0" + minute
+ "分" + second);
} else {
timeView.setText("0" + hour + "小时0" + minute
+ "分0" + second);
}
}
}
} else {// hour>0,minute!=0
if (second == 0) {
second = 59;
minute--;
if (hour >= 10) {
if (second >= 10) {
if (minute >= 10) {
timeView.setText(hour + "小时" + minute
+ "分" + second);
} else {
timeView.setText(hour + "小时0" + minute
+ "分" + second);
}
} else {
if (minute >= 10) {
timeView.setText(hour + "小时" + minute
+ "分0" + second);
} else {
timeView.setText(hour + "小时0" + minute
+ "分0" + second);
}
}
} else {
if (second >= 10) {
if (minute >= 10) {
timeView.setText("0" + hour + "小时"
+ minute + ":" + second);
} else {
timeView.setText("0" + hour + "小时0"
+ minute + "分" + second);
}
} else {
if (minute >= 10) {
timeView.setText("0" + hour + "小时"
+ minute + "分0" + second);
} else {
timeView.setText("0" + hour + "小时0"
+ minute + "分0" + second);
}
}
}

} else {
second--;
if (hour >= 10) {
if (second >= 10) {
if (minute >= 10) {
timeView.setText(hour + "小时" + minute
+ "分" + second);
} else {
timeView.setText(hour + "小时0" + minute
+ "分" + second);
}
} else {
if (minute >= 10) {
timeView.setText(hour + "小时" + minute
+ "分0" + second);
} else {
timeView.setText(hour + ":0" + minute
+ "分0" + second);
}
}
} else {
if (second >= 10) {
if (minute >= 10) {
timeView.setText("0" + hour + "小时"
+ minute + "分" + second);
} else {
timeView.setText("0" + hour + "小时0"
+ minute + "分" + second);
}
} else {
if (minute >= 10) {
timeView.setText("0" + hour + "小时"
+ minute + "分0" + second);
} else {
timeView.setText("0" + hour + "小时0"
+ minute + "分0" + second);
}
}
}

}
}
}
}
}
};

追问

计时的时间需要个人定义，也就是说需要一个定时界面，不是在代码里面就写好了