Android Programming Tutorials

Your Friends Seem Remote

The easiest way to make the above change is to change the first line of the

LocalBinder definition to the first line in the above listing, add the

semicolon at the end, and get rid of the separate declaration and initializer

of binder.

Then, we need to do something about our polling logic, so when we register

an account we do not tie up the UI thread of the client doing an immediate

poll(), yet we still quickly get status updates rather than waiting a full

minute. To help resolve this, we will use two polling periods: a one-second

period when we have no accounts, and the original one-minute period for

when we do have accounts. That way, we will find out about our first

account within one second of it being registered; only then will we slow

down, so as not to abuse the service.

To that end, add the following data members to PostMonitor:

private static final int INITIAL_POLL_PERIOD= 1000 ;

private int pollPeriod=INITIAL_POLL_PERIOD;

Also, change threadBody to use the new polling logic:

private Runnable threadBody=new Runnable() {

public void run() {

while (active.get()) {

for (Account l : accounts.values()) {

poll(l);

pollPeriod=POLL_PERIOD;

}

SystemClock.sleep(pollPeriod);

}

}

};

Now, you should be able to recompile and reinstall both projects.

Launching Patchy will give you similar results as before – the difference

being that now it is using the remote PostMonitor service, rather than a local

one.

Here is an implementation of Patchy after making this tutorial's

modifications:

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