OK I'm reading this page:
http://developer.android.com/guide/appendix/faq/commontasks.html#threading
The code is as in the example (see below). In my application, the
worker thread has done loading of large bitmaps, and I need to notify
the UI thread the filename of the bitmap that was loaded as they get
loaded. How can I notify the UI thread of the filename of the bitmap
just loaded? I can see anyway to for updateResultsInUi() to be able to
take a parameter from the example below.
public class MyActivity extends Activity {
[ . . . ]
// Need handler for callbacks to the UI thread
final Handler mHandler = new Handler();
// Create runnable for posting
final Runnable mUpdateResults = new Runnable() {
public void run() {
updateResultsInUi();
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
[ . . . ]
}
protected void startLongRunningOperation() {
// Fire off a thread to do some work that we shouldn't do
directly in the UI thread
Thread t = new Thread() {
public void run() {
mResults = doSomethingExpensive();
mHandler.post(mUpdateResults);
}
};
t.start();
}
private void updateResultsInUi() {
// Back in the UI thread -- update our UI elements based on
the data in mResults
[ . . . ]
}
}
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