以下是我的code:
在MainActivity.class
In MainActivity.class
private OnCheckedChangeListener alert_on_off_listener = new OnCheckedChangeListener(){ public void onCheckedChanged(RadioGroup groupname, int CheckedButtonId) { if(CheckedButtonId==R.id.radiobutton_on){ Toast.makeText(getApplicationContext(), "radio on", Toast.LENGTH_LONG).show(); alert_on = true; display_alert(); } else{ alert_on = false; } } }; public void display_alert(){ int delay = 10000; Timer timer =new Timer(); timer.scheduleAtFixedRate(new TimerTask() { public void run() { Intent myIntent = new Intent(HoraWatchActivity.this,MyService.class); startService(myIntent); } }, delay,10000); }MyService.class
MyService.class
@Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); if(MainActivity.alert_on) Toast.makeText(getApplicationContext(), "Alert is On", Toast.LENGTH_LONG).show(); else Toast.makeText(getApplicationContext(), "Alert is Off",Toast.LENGTH_LONG).show(); }我检查 onCheckedChangeListener 并调用 display_alert 根据检查单选按钮的功能。
I am checking the onCheckedChangeListener and calling display_alert function according to the checked radio button.
在 display_alert 我是用定时器调度以10秒的固定利率,并要求为MyService 类的功能。
In display_alert function I was using timer scheduling at fixed rate of 10 seconds and calling myservice class.
所以,当我检查了 radio_on 按钮,它会调用我的 display_aler T功能,并得到了警惕的在致祝酒辞。因此,它做工精细。
So once I checked the radio_on button, it calls my display_alert function and got the "alert on" in toast. So its working fine.
如果我再次检查 radio_off 按钮,然后选中 radio_on 按钮,我收到了警惕的敬酒,但敬酒来了两次。同样的,如果我再次选择 radio_on 按钮,面包显示第三次,但我只需要一次。这是由于该定时器正在运行,每10秒。我想停止计时,一旦我点击 radio_off 按钮。
If I again check radio_off button and then check the radio_on button, I am getting the "alert on" toast, but the toast is coming twice. Similarly if I again select the radio_on button, the toast is displaying for the third time, but I need only once. This was due to that the timer is running for every 10 seconds. I want to stop the timer once I click the radio_off button.
问题是,一旦我开始计时,我没有再阻止它。当我应如何取消我的课定时任务?
The problem is, once I started the timer, I was not stopping it further. When and how shall I cancel the timer tasks in my class?
推荐答案首先,在一个独立的方式创建您的TimerTask:
First, create your TimerTask on a separate way:
class MyTimerTask extends TimerTask { public void run() { Intent myIntent = new Intent(HoraWatchActivity.this,MyService.class); startService(myIntent); } }声明它的地方,当然看得见你OnCheckedChangeListener:
Declare it somewhere, of course visible to your OnCheckedChangeListener:
MyTimerTask myTimerTask;安排的:
public void display_alert() { int delay = 10000; myTimerTask = new MyTimerTask(); Timer timer = new Timer(); timer.scheduleAtFixedRate(myTimerTask, delay, 10000); }然后修改code为:
And then modify your code to:
private OnCheckedChangeListener alert_on_off_listener = new OnCheckedChangeListener(){ public void onCheckedChanged(RadioGroup groupname, int CheckedButtonId) { if(CheckedButtonId==R.id.radiobutton_on){ Toast.makeText(getApplicationContext(), "radio on", Toast.LENGTH_LONG).show(); alert_on = true; display_alert(); } else{ myTimerTask.cancel(); alert_on = false; } } };更多推荐
如何停止计时器的Android
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