编写一个计时器显示3.299的代码
时间: 2024-05-01 18:17:41 浏览: 17
好的,以下是 Python 代码:
```
import time
def timer(seconds):
start_time = time.monotonic()
end_time = start_time + seconds
while time.monotonic() < end_time:
remaining_time = end_time - time.monotonic()
display_time = round(remaining_time, 3)
print(display_time)
timer(3.299)
```
相关问题
编写一个计时器
好的,我可以帮你编写一个简单的计时器。你可以按下开始按钮来启动计时器,按下暂停按钮来暂停计时器,按下重置按钮来重置计时器。
以下是一个示例代码:
```python
import time
from tkinter import *
class Timer:
def __init__(self, master):
self.master = master
master.title("计时器")
self.time = 0
self.running = False
self.time_label = Label(master, text="00:00:00")
self.time_label.pack()
self.start_button = Button(master, text="开始", command=self.start)
self.start_button.pack(side=LEFT)
self.pause_button = Button(master, text="暂停", command=self.pause)
self.pause_button.pack(side=LEFT)
self.reset_button = Button(master, text="重置", command=self.reset)
self.reset_button.pack(side=LEFT)
def start(self):
self.running = True
self.run_timer()
def run_timer(self):
while self.running:
hours = int(self.time / 3600)
minutes = int((self.time - hours*3600) / 60)
seconds = int(self.time - hours*3600 - minutes*60)
time_string = '{:02d}:{:02d}:{:02d}'.format(hours, minutes, seconds)
self.time_label.config(text=time_string)
time.sleep(1)
self.time += 1
def pause(self):
self.running = False
def reset(self):
self.running = False
self.time = 0
self.time_label.config(text='00:00:00')
root = Tk()
my_timer = Timer(root)
root.mainloop()
```
这是一个基本的计时器,你可以根据你的需要进行修改和定制化。
用android studio编写一个计时器
以下是一个简单的Android Studio计时器的示例代码:
```java
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
private Button mButtonStart;
private Button mButtonStop;
private Switch mSwitch; private CountDownTimer mCountDownTimer;
private boolean mTimerRunning;
private long mTimeLeftInMillis = 600000; // 10分钟
private long mEndTime;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = findViewById(R.id.text_view_countdown);
mButtonStart = findViewById(R.id.button_start);
mButtonStop = findViewById(R.id.button_stop); mSwitch = findViewById(R.id.switch_timer);
mButtonStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startTimer();
}
});
mButtonStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
stopTimer();
}
});
mSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
mTimeLeftInMillis = 300000; // 5分钟
} else {
mTimeLeftInMillis = 600000; // 10分钟
}
updateCountDownText();
}
});
updateCountDownText();
}
private void startTimer() {
mEndTime = System.currentTimeMillis() + mTimeLeftInMillis;
mCountDownTimer = new CountDownTimer(mTimeLeftInMillis, 1000) {
@Override
public void onTick(long millisUntilFinished) {
mTimeLeftInMillis = millisUntilFinished;
updateCountDownText();
}
@Override
public void onFinish() {
mTimerRunning = false;
mButtonStart.setVisibility(View.VISIBLE);
mButtonStop.setVisibility(View.INVISIBLE);
}
}.start();
mTimerRunning = true;
mButtonStart.setVisibility(View.INVISIBLE);
mButtonStop.setVisibility(View.VISIBLE);
}
private void stopTimer() {
mCountDownTimer.cancel();
mTimerRunning = false;
mButtonStart.setVisibility(View.VISIBLE);
mButtonStop.setVisibility(View.INVISIBLE);
}
private void updateCountDownText() {
int minutes = (int) (mTimeLeftInMillis / 1000) / 60;
int seconds = (int) (mTimeLeftInMillis / 1000) % 60;
String timeLeftFormatted = String.format(Locale.getDefault(), "%02d:%02d", minutes, seconds);
mTextView.setText(timeLeftFormatted);
}
}
```
这个计时器包括一个文本视图,两个按钮和一个开关。用户可以选择计时器的时间长度,然后按下“开始”按钮启动计时器。计时器将在指定的时间内倒计时,并在计时结束时停止。用户还可以按下“停止”按钮手动停止计时器。