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| import android.support.annotation.CheckResult; | |
| import android.support.annotation.NonNull; | |
| import android.widget.AbsListView; | |
| import com.jakewharton.rxbinding.view.ViewEvent; | |
| public final class ListViewScrollEvent extends ViewEvent<AbsListView> { | |
| @CheckResult | |
| @NonNull | |
| public static ListViewScrollEvent create(AbsListView listView, int scrollState, | |
| int firstVisibleItem, int visibleItemCount, int totalItemCount) { | |
| return new ListViewScrollEvent(listView, scrollState, firstVisibleItem, visibleItemCount, | |
| totalItemCount); | |
| } | |
| public final int scrollState; | |
| public final int firstVisibleItem; | |
| public final int visibleItemCount; | |
| public final int totalItemCount; | |
| private ListViewScrollEvent(@NonNull AbsListView view, int scrollState, | |
| int firstVisibleItem, int visibleItemCount, int totalItemCount) { | |
| super(view); | |
| this.scrollState = scrollState; | |
| this.firstVisibleItem = firstVisibleItem; | |
| this.visibleItemCount = visibleItemCount; | |
| this.totalItemCount = totalItemCount; | |
| } | |
| public int scrollState() { | |
| return scrollState; | |
| } | |
| public int firstVisibleItem() { | |
| return firstVisibleItem; | |
| } | |
| public int visibleItemCount() { | |
| return visibleItemCount; | |
| } | |
| public int totalItemCount() { | |
| return totalItemCount; | |
| } | |
| @Override | |
| public boolean equals(Object o) { | |
| if (this == o) return true; | |
| if (o == null || getClass() != o.getClass()) return false; | |
| ListViewScrollEvent that = (ListViewScrollEvent) o; | |
| if (scrollState != that.scrollState) return false; | |
| if (firstVisibleItem != that.firstVisibleItem) return false; | |
| if (visibleItemCount != that.visibleItemCount) return false; | |
| return totalItemCount == that.totalItemCount; | |
| } | |
| @Override | |
| public int hashCode() { | |
| int result = scrollState; | |
| result = 31 * result + firstVisibleItem; | |
| result = 31 * result + visibleItemCount; | |
| result = 31 * result + totalItemCount; | |
| return result; | |
| } | |
| @Override | |
| public String toString() { | |
| return "ListViewScrollEvent{" + | |
| "scrollState=" + scrollState + | |
| ", firstVisibleItem=" + firstVisibleItem + | |
| ", visibleItemCount=" + visibleItemCount + | |
| ", totalItemCount=" + totalItemCount + | |
| '}'; | |
| } | |
| } |
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| import android.widget.AbsListView; | |
| import rx.Observable; | |
| import rx.Subscriber; | |
| import rx.android.MainThreadSubscription; | |
| import static com.jakewharton.rxbinding.internal.Preconditions.checkUiThread; | |
| public final class ListViewScrollEventOnSubscribe | |
| implements Observable.OnSubscribe<ListViewScrollEvent> { | |
| final AbsListView view; | |
| public ListViewScrollEventOnSubscribe(AbsListView view) { | |
| this.view = view; | |
| } | |
| @Override | |
| public void call(final Subscriber<? super ListViewScrollEvent> subscriber) { | |
| checkUiThread(); | |
| final AbsListView.OnScrollListener listener = new AbsListView.OnScrollListener() { | |
| int currentScrollState = SCROLL_STATE_IDLE; | |
| @Override | |
| public void onScrollStateChanged(AbsListView view, int scrollState) { | |
| this.currentScrollState = scrollState; | |
| } | |
| @Override | |
| public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, | |
| int totalItemCount) { | |
| if (!subscriber.isUnsubscribed()) { | |
| ListViewScrollEvent event = ListViewScrollEvent | |
| .create(view, this.currentScrollState, firstVisibleItem, | |
| visibleItemCount, totalItemCount); | |
| subscriber.onNext(event); | |
| } | |
| } | |
| }; | |
| view.setOnScrollListener(listener); | |
| subscriber.add(new MainThreadSubscription() { | |
| @Override | |
| protected void onUnsubscribe() { | |
| view.setOnScrollListener(null); | |
| } | |
| }); | |
| } | |
| } |
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| import android.support.annotation.CheckResult; | |
| import android.support.annotation.NonNull; | |
| import android.widget.AbsListView; | |
| import android.widget.AbsListView.OnScrollListener; | |
| import rx.Observable; | |
| import static com.google.common.base.Preconditions.checkNotNull; | |
| public final class RxListView { | |
| /** | |
| * Create an observable of scroll events on {@code listView}. | |
| * <p> | |
| * <em>Warning:</em> The created observable keeps a strong reference to {@code listView}. | |
| * Unsubscribe to free this reference. | |
| * * <p> | |
| * <em>Warning:</em> The created observable uses {@link AbsListView#setOnScrollListener(OnScrollListener)} | |
| * to observe scroll changes. Only one observable can be used for a view at a time. | |
| * <p> | |
| */ | |
| @CheckResult | |
| @NonNull | |
| public static Observable<ListViewScrollEvent> scrollEvents(@NonNull AbsListView view) { | |
| checkNotNull(view, "view == null"); | |
| return Observable.create(new ListScrollEventOnSubscribe(view)); | |
| } | |
| } |
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prob does the same but use this
import static com.jakewharton.rxbinding.internal.Preconditions.checkNotNull;