*/
public void registerCallback(Callback callback, Handler handler) {
synchronized (this) {
- if (callback != null && !mCallbacks.contains(callback)) {
+ if (callback != null && findCallbackLocked(callback) < 0) {
boolean addedFirstCallback = mCallbacks.size() == 0;
addCallbackLocked(callback, handler);
if (addedFirstCallback) {
}
}
- private void removeCallbackLocked(Callback callback) {
+ /** @return position in mCallbacks for callback or -1 if not present. */
+ private int findCallbackLocked(Callback callback) {
if (callback == null) {
throw new IllegalArgumentException("Callback cannot be null");
}
final int size = mCallbacks.size();
for (int i = 0; i < size; ++i) {
if (mCallbacks.get(i).mCallback == callback) {
- mCallbacks.remove(i);
- return;
+ return i;
}
}
+ return -1;
+ }
+
+ private void removeCallbackLocked(Callback callback) {
+ int pos = findCallbackLocked(callback);
+ if (pos >= 0) {
+ mCallbacks.remove(pos);
+ }
}
private void addCallbackLocked(Callback callback, Handler handler) {