private void clear() {
if (properties != null) {
properties.clear();
properties = null;
}
if (hash != null) {
hash.clear();
hash = null;
}
if (task != null) {
task.cancel(true);
task = null;
}
if (concerned != null) {
concerned.clear();
concerned = null;
}
url = null;
priority = 0;
}
public void start() {
if (task == null) {
task = new WebTask();
task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, hash); // task.execute(hash);
}
}