Load enough initial data into BaseListFragment
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litetex
parent
2814ae6d3c
commit
fb362022f7
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@ -271,7 +271,7 @@ public abstract class BaseListFragment<I, N> extends BaseStateFragment<I>
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@Override
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protected void initListeners() {
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super.initListeners();
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infoListAdapter.setOnStreamSelectedListener(new OnClickGesture<StreamInfoItem>() {
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infoListAdapter.setOnStreamSelectedListener(new OnClickGesture<>() {
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@Override
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public void selected(final StreamInfoItem selectedItem) {
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onStreamSelected(selectedItem);
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@ -418,7 +418,66 @@ public abstract class BaseListFragment<I, N> extends BaseStateFragment<I>
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// Load and handle
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//////////////////////////////////////////////////////////////////////////*/
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protected abstract void loadMoreItems();
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/**
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* If more items are loadable and the itemList is not scrollable -> load more data.
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* <br/>
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* Should be called once the initial items inside {@link #startLoading(boolean)}
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* has been loaded and added to the {@link #itemsList}.
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* <br/>
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* Otherwise the loading indicator is always shown but no data can be loaded
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* because the view is not scrollable; see also #1974.
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*/
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protected void ifMoreItemsLoadableLoadUntilScrollable() {
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ifMoreItemsLoadableLoadUntilScrollable(0);
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}
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/**
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* If more items are loadable and the itemList is not scrollable -> load more data.
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*
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* @param recursiveCallCount Amount of recursive calls that occurred
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* @see #ifMoreItemsLoadableLoadUntilScrollable()
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*/
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protected void ifMoreItemsLoadableLoadUntilScrollable(final int recursiveCallCount) {
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// Try to prevent malfunction / stackoverflow
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if (recursiveCallCount > 100) {
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Log.w(TAG, "loadEnoughInitialData - Too many recursive calls - Aborting");
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return;
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}
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if (!hasMoreItems()) {
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if (DEBUG) {
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Log.d(TAG, "loadEnoughInitialData - OK: No more items to load");
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}
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return;
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}
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if (itemsList.canScrollVertically(1)
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|| itemsList.canScrollVertically(-1)) {
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if (DEBUG) {
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Log.d(TAG, "loadEnoughInitial - OK: itemList is scrollable");
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}
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return;
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}
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if (DEBUG) {
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Log.d(TAG, "loadEnoughInitialData - View is not scrollable "
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+ "but it could load more items -> Loading more");
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}
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loadMoreItems(() ->
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ifMoreItemsLoadableLoadUntilScrollable(recursiveCallCount + 1));
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}
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/**
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* Loads more items.
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* @param initialDataLoadCallback
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* Callback used in {@link #ifMoreItemsLoadableLoadUntilScrollable()}.
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* <br/>
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* Execute it once the data was loaded and added to the {@link #itemsList}.
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* <br/>
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* Might be <code>null</code>.
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*/
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protected abstract void loadMoreItems(@Nullable Runnable initialDataLoadCallback);
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protected void loadMoreItems() {
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loadMoreItems(null);
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}
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protected abstract boolean hasMoreItems();
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@ -6,6 +6,7 @@ import android.util.Log;
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import android.view.View;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import org.schabi.newpipe.error.ErrorInfo;
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import org.schabi.newpipe.error.UserAction;
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@ -65,7 +66,7 @@ public abstract class BaseListInfoFragment<I extends ListInfo>
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super.onResume();
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// Check if it was loading when the fragment was stopped/paused,
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if (wasLoading.getAndSet(false)) {
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if (hasMoreItems() && infoListAdapter.getItemsList().size() > 0) {
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if (hasMoreItems() && !infoListAdapter.getItemsList().isEmpty()) {
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loadMoreItems();
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} else {
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doInitialLoadLogic();
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@ -105,6 +106,7 @@ public abstract class BaseListInfoFragment<I extends ListInfo>
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// Load and handle
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//////////////////////////////////////////////////////////////////////////*/
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@Override
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protected void doInitialLoadLogic() {
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if (DEBUG) {
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Log.d(TAG, "doInitialLoadLogic() called");
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@ -144,6 +146,7 @@ public abstract class BaseListInfoFragment<I extends ListInfo>
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currentInfo = result;
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currentNextPage = result.getNextPage();
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handleResult(result);
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ifMoreItemsLoadableLoadUntilScrollable();
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}, throwable ->
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showError(new ErrorInfo(throwable, errorUserAction,
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"Start loading: " + url, serviceId)));
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@ -158,7 +161,8 @@ public abstract class BaseListInfoFragment<I extends ListInfo>
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*/
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protected abstract Single<ListExtractor.InfoItemsPage> loadMoreItemsLogic();
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protected void loadMoreItems() {
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@Override
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protected void loadMoreItems(@Nullable final Runnable initialDataLoadCallback) {
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isLoading.set(true);
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if (currentWorker != null) {
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@ -171,9 +175,12 @@ public abstract class BaseListInfoFragment<I extends ListInfo>
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.subscribeOn(Schedulers.io())
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.observeOn(AndroidSchedulers.mainThread())
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.doFinally(this::allowDownwardFocusScroll)
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.subscribe((@NonNull ListExtractor.InfoItemsPage InfoItemsPage) -> {
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.subscribe(infoItemsPage -> {
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isLoading.set(false);
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handleNextItems(InfoItemsPage);
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handleNextItems(infoItemsPage);
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if (initialDataLoadCallback != null) {
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initialDataLoadCallback.run();
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}
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}, (@NonNull Throwable throwable) ->
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dynamicallyShowErrorPanelOrSnackbar(new ErrorInfo(throwable,
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errorUserAction, "Loading more items: " + url, serviceId)));
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@ -223,7 +230,7 @@ public abstract class BaseListInfoFragment<I extends ListInfo>
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setTitle(name);
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if (infoListAdapter.getItemsList().isEmpty()) {
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if (result.getRelatedItems().size() > 0) {
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if (!result.getRelatedItems().isEmpty()) {
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infoListAdapter.addInfoItemList(result.getRelatedItems());
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showListFooter(hasMoreItems());
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} else {
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@ -240,7 +247,7 @@ public abstract class BaseListInfoFragment<I extends ListInfo>
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final List<Throwable> errors = new ArrayList<>(result.getErrors());
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// handling ContentNotSupportedException not to show the error but an appropriate string
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// so that crashes won't be sent uselessly and the user will understand what happened
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errors.removeIf(throwable -> throwable instanceof ContentNotSupportedException);
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errors.removeIf(ContentNotSupportedException.class::isInstance);
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if (!errors.isEmpty()) {
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dynamicallyShowErrorPanelOrSnackbar(new ErrorInfo(result.getErrors(),
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@ -868,12 +868,15 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
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.subscribeOn(Schedulers.io())
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.observeOn(AndroidSchedulers.mainThread())
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.doOnEvent((searchResult, throwable) -> isLoading.set(false))
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.subscribe(this::handleResult, this::onItemError);
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.subscribe(result -> {
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handleResult(result);
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ifMoreItemsLoadableLoadUntilScrollable();
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}, this::onItemError);
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}
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@Override
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protected void loadMoreItems() {
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protected void loadMoreItems(@Nullable final Runnable initialDataLoadCallback) {
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if (!Page.isValid(nextPage)) {
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return;
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}
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@ -891,7 +894,12 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
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.subscribeOn(Schedulers.io())
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.observeOn(AndroidSchedulers.mainThread())
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.doOnEvent((nextItemsResult, throwable) -> isLoading.set(false))
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.subscribe(this::handleNextItems, this::onItemError);
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.subscribe(itemsPage -> {
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handleNextItems(itemsPage);
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if (initialDataLoadCallback != null) {
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initialDataLoadCallback.run();
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}
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}, this::onItemError);
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}
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@Override
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