英文:
My timer start triggering faster and faster every time I start it again
问题
这似乎是多个定时器同时运行的情况。每次点击特定按钮时，我调用这个 realTimer 函数。我该如何解决？
以下是代码部分：
public void realTimer(){
running = true;
final Handler handler = new Handler();
handler.post(new Runnable() {
@Override
public void run() {
int hours = counter/3600;
int minutes = (counter%3600)/60;
int secs = counter%60;
String time = String.format("%d:%02d:%02d", hours, minutes, secs);
timerTextView.setText(time);
if(running){
counter++;
}
handler.postDelayed(this, 1000);
}
});
}
英文:
It seems like there are multiple timers running together. I‘m calling this realTimer function each time a certain button is clicked. How do I solve it?
this is the code:
public void realTimer(){
running = true;
final Handler handler = new Handler();
handler.post(new Runnable() {
@Override
public void run() {
int hours = counter/3600;
int minutes = (counter%3600)/60;
int secs = counter%60;
String time = String.format("%d:%02d:%02d", hours, minutes, secs);
timerTextView.setText(time);
if(running){
counter++;
}
handler.postDelayed(this, 1000);
}
});
}
答案1
得分: 1
我认为代码应该像这样：
// 顶层代码
final Handler handler = new Handler();
// ... 其他函数放在这里
public void realTimer(){
running = true;
counter = 0;
handler.removeCallbacksAndMessages(null);
Runnable callback = new Runnable() {
@Override
public void run() {
int hours = counter/3600;
int minutes = (counter%3600)/60;
int secs = counter%60;
String time = String.format("%d:%02d:%02d", hours, minutes, secs);
timerTextView.setText(time);
if(running){
counter++;
}
handler.postDelayed(this, 1000);
}
};
handler.post(callback);
}
每次调用realTime()函数时，计数器被设置为0，并且从处理程序中移除回调。
英文:
I think the code should be like this :
//top level code
final Handler handler = new Handler();
//... other functions goes here
public void realTimer(){
running = true;
counter = 0;
handler.removeCallbacksAndMessages(null);
Runnable callback = new Runnable() {
@Override
public void run() {
int hours = counter/3600;
int minutes = (counter%3600)/60;
int secs = counter%60;
String time = String.format("%d:%02d:%02d", hours, minutes, secs);
timerTextView.setText(time);
if(running){
counter++;
}
handler.postDelayed(this, 1000);
}
};
handler.post(callback);
}
The counter is set to 0 each time realTime() function is called, and callbacks are removed from the handler
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