Java Code Examples for androidx.recyclerview.widget.RecyclerView#AdapterDataObserver

The following examples show how to use androidx.recyclerview.widget.RecyclerView#AdapterDataObserver . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: TestUtils.java From FeatureAdapter with Apache License 2.0

6 votes

/**
 * Fixes internal dependencies to android.database.Observable so that a RecyclerView.Adapter can
 * be tested using regular unit tests while verifying changes to the data.
 *
 * <p>Pulled from:
 * https://github.com/badoo/Chateau/blob/master/ExampleApp/src/test/java/com/badoo/chateau/example/ui/utils/TestUtils.java
 */
public static RecyclerView.AdapterDataObserver fixAdapterForTesting(RecyclerView.Adapter adapter)
    throws NoSuchFieldException, IllegalAccessException {
  // Observables are not mocked by default so we need to hook the adapter up to an observer so we can track changes
  Field observableField = RecyclerView.Adapter.class.getDeclaredField("mObservable");
  observableField.setAccessible(true);
  Object observable = observableField.get(adapter);
  Field observersField = Observable.class.getDeclaredField("mObservers");
  observersField.setAccessible(true);
  final ArrayList<Object> observers = new ArrayList<>();
  RecyclerView.AdapterDataObserver dataObserver =
      createMock(RecyclerView.AdapterDataObserver.class);
  observers.add(dataObserver);
  observersField.set(observable, observers);
  return dataObserver;
}

Example 2

Source File: BaseMVPActivity.java From DevUtils with Apache License 2.0

5 votes

/**
 * 注册 Adapter 观察者
 * @param recyclerView        {@link RecyclerView}
 * @param adapterDataObserver Adapter 观察者
 * @param isRefAdapter        是否刷新适配器
 */
public void registerAdapterDataObserver(RecyclerView recyclerView, RecyclerView.AdapterDataObserver adapterDataObserver, boolean isRefAdapter) {
    if (recyclerView != null) {
        RecyclerView.Adapter adapter = recyclerView.getAdapter();
        if (adapter != null) {
            adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
                @Override
                public void onChanged() {
                    super.onChanged();
                    // 获取数据总数
                    int itemCount = adapter.getItemCount();
                    // 如果为 null 特殊处理
                    ViewUtils.reverseVisibilitys(itemCount != 0, vid_ba_content_linear, vid_ba_state_linear);
                    // 判断是否不存在数据
                    if (itemCount == 0) {
                        stateLayout.showEmptyData();
                    }

                    if (adapterDataObserver != null) {
                        adapterDataObserver.onChanged();
                    }
                }
            });
            // 刷新适配器
            if (isRefAdapter) adapter.notifyDataSetChanged();
        }
    }
}

Example 3

Source File: AbstractPagerFragment.java From cloudinary_android with MIT License

5 votes

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_pager_page, container, false);

    recyclerView = (RecyclerView) rootView.findViewById(R.id.mainGallery);
    recyclerView.setHasFixedSize(true);
    ((SimpleItemAnimator) recyclerView.getItemAnimator()).setSupportsChangeAnimations(false);
    RecyclerView.LayoutManager layoutManager = getLayoutManager(getContext());
    recyclerView.setLayoutManager(layoutManager);
    emptyView = rootView.findViewById(R.id.emptyListView);
    dividerSize = getResources().getDimensionPixelSize(R.dimen.grid_divider_width);
    addItemDecoration(recyclerView);
    observer = new RecyclerView.AdapterDataObserver() {
        @Override
        public void onChanged() {
            super.onChanged();
            emptyView.setVisibility(recyclerView.getAdapter().getItemCount() == 0 ? View.VISIBLE : View.INVISIBLE);
        }

        @Override
        public void onItemRangeInserted(int positionStart, int itemCount) {
            super.onItemRangeInserted(positionStart, itemCount);
            emptyView.setVisibility(recyclerView.getAdapter().getItemCount() == 0 ? View.VISIBLE : View.INVISIBLE);

        }

        @Override
        public void onItemRangeRemoved(int positionStart, int itemCount) {
            super.onItemRangeRemoved(positionStart, itemCount);
            emptyView.setVisibility(recyclerView.getAdapter().getItemCount() == 0 ? View.VISIBLE : View.INVISIBLE);

        }
    };

    return rootView;
}

Example 4

Source File: CompositeRecyclerAdapter.java From recyclerview-adapters with Apache License 2.0

5 votes

@Override
public void bindParentAdapter(@Nullable CompositeRecyclerAdapter adapter, @Nullable RecyclerView.AdapterDataObserver dataObserver) {
    if (hasParentAdapter()) {
        throw new IllegalStateException("Adapter already has parentAdapter.");
    }
    parentAdapter = new WeakReference<>(adapter);
    registerAdapterDataObserver(dataObserver);
}

Example 5

Source File: BaseLocalAdapter.java From recyclerview-adapters with Apache License 2.0

5 votes

@Override
public void bindParentAdapter(@Nullable CompositeRecyclerAdapter adapter, @Nullable RecyclerView.AdapterDataObserver dataObserver) {
    if (hasParentAdapter()) {
        throw new IllegalStateException("Adapter already has parentAdapter.");
    }
    parentAdapter = new WeakReference<>(adapter);
    registerAdapterDataObserver(dataObserver);
}

Example 6

Source File: BaseActivity.java From DevUtils with Apache License 2.0

5 votes

/**
 * 注册 Adapter 观察者
 * @param recyclerView        {@link RecyclerView}
 * @param adapterDataObserver Adapter 观察者
 * @param isRefAdapter        是否刷新适配器
 */
public void registerAdapterDataObserver(RecyclerView recyclerView, RecyclerView.AdapterDataObserver adapterDataObserver, boolean isRefAdapter) {
    if (recyclerView != null) {
        RecyclerView.Adapter adapter = recyclerView.getAdapter();
        if (adapter != null) {
            adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
                @Override
                public void onChanged() {
                    super.onChanged();
                    // 获取数据总数
                    int itemCount = adapter.getItemCount();
                    // 如果为 null 特殊处理
                    ViewUtils.reverseVisibilitys(itemCount != 0, vid_ba_content_linear, vid_ba_state_linear);
                    // 判断是否不存在数据
                    if (itemCount == 0) {
                        stateLayout.showEmptyData();
                    }

                    if (adapterDataObserver != null) {
                        adapterDataObserver.onChanged();
                    }
                }
            });
            // 刷新适配器
            if (isRefAdapter) adapter.notifyDataSetChanged();
        }
    }
}

Example 7

Source File: BaseAnimationAdapter.java From PictureSelector with Apache License 2.0

4 votes

@Override
public void registerAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
    super.registerAdapterDataObserver(observer);
    mAdapter.registerAdapterDataObserver(observer);
}

Example 8

Source File: BaseAnimationAdapter.java From PictureSelector with Apache License 2.0

4 votes

@Override
public void unregisterAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
    super.unregisterAdapterDataObserver(observer);
    mAdapter.unregisterAdapterDataObserver(observer);
}

Example 9

Source File: WrapperAdapter.java From OmegaRecyclerView with MIT License

4 votes

@Override
public void registerAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
    mChildAdapter.registerAdapterDataObserver(observer);
}

Example 10

Source File: WrapperAdapter.java From OmegaRecyclerView with MIT License

4 votes

@Override
public void unregisterAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
    mChildAdapter.unregisterAdapterDataObserver(observer);
}

Example 11

Source File: CircleIndicator3.java From CircleIndicator with Apache License 2.0

4 votes

public RecyclerView.AdapterDataObserver getAdapterDataObserver() {
    return mAdapterDataObserver;
}

Example 12

Source File: BaseFilter.java From MusicBobber with MIT License

4 votes

public RecyclerView.AdapterDataObserver getAdapterDataObserver() {
    return adapterDataObserver;
}

Example 13

Source File: ViewPager2Attacher.java From ScrollingPagerIndicator with Apache License 2.0

4 votes

@Override
public void attachToPager(@NonNull final ScrollingPagerIndicator indicator, @NonNull final ViewPager2 pager) {
    attachedAdapter = pager.getAdapter();
    if (attachedAdapter == null) {
        throw new IllegalStateException("Set adapter before call attachToPager() method");
    }

    this.pager = pager;

    updateIndicatorDotsAndPosition(indicator);

    dataSetObserver = new RecyclerView.AdapterDataObserver() {
        @Override
        public void onChanged() {
            indicator.reattach();
        }
    };
    attachedAdapter.registerAdapterDataObserver(dataSetObserver);

    onPageChangeListener = new ViewPager2.OnPageChangeCallback() {

        boolean idleState = true;

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixel) {
            updateIndicatorOnPagerScrolled(indicator, position, positionOffset);
        }

        @Override
        public void onPageSelected(int position) {
            if (idleState) {
                updateIndicatorDotsAndPosition(indicator);
            }
        }

        @Override
        public void onPageScrollStateChanged(int state) {
            idleState = state == ViewPager2.SCROLL_STATE_IDLE;
        }
    };

    pager.registerOnPageChangeCallback(onPageChangeListener);
}

Example 14

Source File: RecyclerViewAttacher.java From ScrollingPagerIndicator with Apache License 2.0

4 votes

@Override
public void attachToPager(@NonNull final ScrollingPagerIndicator indicator, @NonNull final RecyclerView pager) {
    if (!(pager.getLayoutManager() instanceof LinearLayoutManager)) {
        throw new IllegalStateException("Only LinearLayoutManager is supported");
    }
    if (pager.getAdapter() == null) {
        throw new IllegalStateException("RecyclerView has not Adapter attached");
    }
    this.layoutManager = (LinearLayoutManager) pager.getLayoutManager();
    this.recyclerView = pager;
    this.attachedAdapter = pager.getAdapter();
    this.indicator = indicator;

    dataObserver = new RecyclerView.AdapterDataObserver() {
        @Override
        public void onChanged() {
            indicator.setDotCount(attachedAdapter.getItemCount());
            updateCurrentOffset();
        }

        @Override
        public void onItemRangeChanged(int positionStart, int itemCount) {
            onChanged();
        }

        @Override
        public void onItemRangeChanged(int positionStart, int itemCount, Object payload) {
            onChanged();
        }

        @Override
        public void onItemRangeInserted(int positionStart, int itemCount) {
            onChanged();
        }

        @Override
        public void onItemRangeRemoved(int positionStart, int itemCount) {
            onChanged();
        }

        @Override
        public void onItemRangeMoved(int fromPosition, int toPosition, int itemCount) {
            onChanged();
        }
    };
    attachedAdapter.registerAdapterDataObserver(dataObserver);
    indicator.setDotCount(attachedAdapter.getItemCount());
    updateCurrentOffset();

    scrollListener = new RecyclerView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
            if (newState == RecyclerView.SCROLL_STATE_IDLE && isInIdleState()) {
                int newPosition = findCompletelyVisiblePosition();
                if (newPosition != RecyclerView.NO_POSITION) {
                    indicator.setDotCount(attachedAdapter.getItemCount());
                    if (newPosition < attachedAdapter.getItemCount()) {
                        indicator.setCurrentPosition(newPosition);
                    }
                }
            }
        }

        @Override
        public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
            updateCurrentOffset();
        }
    };

    recyclerView.addOnScrollListener(scrollListener);
}

Example 15

Source File: RecyclerConverterAdapter.java From power-adapters with Apache License 2.0

4 votes

@Override
public final void registerAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
    super.registerAdapterDataObserver(observer);
    mAdapterDataObservers.add(observer);
    updateObserver();
}

Example 16

Source File: CircleIndicator2.java From CircleIndicator with Apache License 2.0

4 votes

public RecyclerView.AdapterDataObserver getAdapterDataObserver() {
    return mAdapterDataObserver;
}

Example 17

Source File: AdapterWrapper.java From SwipeRecyclerView with Apache License 2.0

4 votes

@Override
public void registerAdapterDataObserver(@NonNull RecyclerView.AdapterDataObserver observer) {
    super.registerAdapterDataObserver(observer);
}

Example 18

Source File: AdapterWrapper.java From SwipeRecyclerView with Apache License 2.0

4 votes

@Override
public void unregisterAdapterDataObserver(@NonNull RecyclerView.AdapterDataObserver observer) {
    super.unregisterAdapterDataObserver(observer);
}

Example 19

Source File: AnimationAdapter.java From recyclerview-animators with Apache License 2.0

4 votes

@Override public void registerAdapterDataObserver(RecyclerView.AdapterDataObserver observer) {
  super.registerAdapterDataObserver(observer);
  mAdapter.registerAdapterDataObserver(observer);
}

Example 20

Source File: LocalAdapter.java From recyclerview-adapters with Apache License 2.0

votes

void bindParentAdapter(@Nullable CompositeRecyclerAdapter adapter, @Nullable RecyclerView.AdapterDataObserver dataObserver);