如何取消计时器并更新同一个定时器? [英] How to cancel the timer and renew the same timer?
问题描述
我创建一个应用程序,振动并发出蜂鸣声,每30秒,当我退出的振动并发出蜂鸣声必须取消,当我登录的振动和蜂鸣应该恢复。
I am creating an app that vibrate and beep every 30 sec and when I log out the vibrate and beep must be cancelled and when I log in the vibrate and beep should resume.
注:必须振动并发出蜂鸣声,每30秒,直到我退出
NOTE: it must vibrate and beep for every 30 sec until I log out
在我的应用程序,我使用的TimerTask
此实施
In my app I am using TimerTask
for this implementation
这是在code为振动并发出蜂鸣声使用的TimerTask
this is the code for vibrate and beep using TimerTask
static TimerTask Task;
final static Handler handler = new Handler();
static Timer t = new Timer();
public static void vib() {
Task = new TimerTask() {
public void run() {
handler.post(new Runnable() {
public void run() {
Vibrator vibrator = (Vibrator) ApplicationUtils.getContext().getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(3000);
playSound();
Log.d("TIMER", "Timer set on");
}
});
}
};
t.schedule(Task, 0, 30000);
}
这是注销部分code我用
This is the code I'm using in logout section
public void stopvib() {
if (Task != null) {
// Log.d("TIMER", "timer canceled");
t.cancel();
Task.cancel();
}
}
注:我也删除了 Task.cancel();
但还是我收到同样的错误
Note: I also removed the Task.cancel();
but still I am getting same error
我的震动做工精细注销前重新登录我歌厅错误
My vibrate working fine before logout and again login I am geting error
java.lang.IllegalStateException: Timer was cancelled
at java.util.Timer.scheduleImpl(Timer.java:562)
at java.util.Timer.schedule(Timer.java:481)
at com.vib(AlertListActivity.java:724)
任何一个可以帮我这个编码。我哪里做错了?
can any one help me with this coding. Where did I go wrong?
推荐答案
我最近运行此code和工作正常。这可以通过使用广播Receiver.You实现必须实行独立的CustomTimer任务,扩展TimerTask的:
i have recently run this code and is working fine. This can be achieved using broadcast Receiver.You have to implement separate CustomTimer task that extend TimerTask:
Activity mActivity=null;
public MyCustomTimer(Activity mActivity) {
this.mActivity=mActivity;
}
@Override
public void run() {
this.mActivity.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(mActivity, "Write you code here",Toast.LENGTH_LONG).show();
Log.d("MyCustomTimer","Call");
}
});
}
在此,你必须实现广播要实现VIB()方法的类接收: 让说,在我的情况(只是举例)是MainActivity:
After this you have to implement BroadCast Receive in that class where you want to implement " vib() " method.: Let say, in my case (just for example ) is MainActivity:
public class MainActivity extends Activity {
private MyCustomTimer myCustomTimer = null;
BroadcastReceiver mBr_Start = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("START_VIBRATION")) {
System.out.println("onreceive :START_VIBRATION");
vib();
}
}
};
BroadcastReceiver mBr_Stop = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("STOP_VIBRATION")) {
stopVibration();
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
IntentFilter mIntentFilter = new IntentFilter();
mIntentFilter.addAction("START_VIBRATION");
registerReceiver(mBr_Start, mIntentFilter);
IntentFilter mIntentFilter2 = new IntentFilter();
mIntentFilter2.addAction("STOP_VIBRATION");
registerReceiver(mBr_Stop, mIntentFilter2);
Button b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(MainActivity.this, MySecondActivity.class)
.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private void vib() {
myCustomTimer = new MyCustomTimer(MainActivity.this);
Timer timer = new Timer();
timer.scheduleAtFixedRate(myCustomTimer, 0, 30000);
}
private void stopVibration() {
Log.d("MainActivity", "Before Cancel");
if (null != myCustomTimer)
myCustomTimer.cancel();
Log.d("MainActivity", "After Cancel");
}
}
现在,你可以启动或通过实施这些行停振: 要启动振动:
Now,you can start Or stop vibration by implementing these lines: To start vibration:
Intent i=new Intent("START_VIBRATION");
mActivity.sendBroadcast(i);
要停止:
Intent i=new Intent("STOP_VIBRATION");
mActivity.sendBroadcast(i);
请注意: 的onDestroy()MainActivity的(在你的情况,你在哪里实现广播接收器,注销的BroadcastReceiver。)
Note: onDestroy() of MainActivity (in your case,Where you implement Broadcast Receiver,unregister BroadcastReceiver.)
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