Do *not* use volatile variables. They are not guaranteed to be atomic.
It's just a compiler hint.
Instead, use synchronized blocks:
class MyThread extends Thread {
boolean mPaused;
boolean mStopped;
public void run() {
...
...
mStopped = false;
mPaused = true or false, depends on your application.
while (!mStopped) {
if (waitForResume())
break;
// do your thing.
...
}
}
public void stopThread() {
syncrhonized(this) {
mPaused = false;
mStopped = true;
this.notify();
}
// optionally, code an extra 'join()' statement if the caller
needs
// to wait until the thread has completely finished.
}
public void pauseThread() {
syncrhonized(this) {
mPaused = true;
this.notify();
}
}
public void resumeThread() {
syncrhonized(this) {
mPaused = false;
this.notify();
}
}
private boolean waitForResume() {
synchronized(this) {
if (mStopped)
return false;
while (mPaused) {
this.wait();
}
if (mStopped)
return false;
}
}
...
...
}
Then code that needs to control your thread, just call
myThread.pauseThread() or myThread.resumeThread() and stops the thread
entirely by calling myThread.stopThread();
Note: you could replace 'this' with another object to use for
synchronization.
On Apr 1, 10:06 am, Tom <[email protected]> wrote:
> Try this:
>
> Create a set of volatile variables (toPause, isPaused, toStop,
> isStopped).
>
> Outside the thread, in the methods mentioned previously, set or clear
> the appropriate variables.
> Inside the thread, be checking the appropriate variables to determine
> if the thread needs to be paused or stopped.
>
> Put the use of the variable within synchronized blocks.
> Use wait and notify to avoid busy polling.
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
-~----------~----~----~----~------~----~------~--~---
