水平RecyclerView内部的水平ViewPager
我有一个与GridLayoutManager的recyclerview，并在项目内使用ViewPager显示照片，我得到下面的崩溃：
02-28 14：58：56.618 30212-30212 / ofeksprojects.ofek.com.tw E / AndroidRuntime：致命例外：主进程：ofeksprojects.ofek.com.twoutout，PID：30212 java.lang.NullPointerException：尝试调用virtual上在eu.fiskur.simpleviewpager.SimpleViewPager.onLayout在eu.fiskur.simpleviewpager.SimpleViewPager.setIndicator（SimpleViewPager.java:217）空对象引用方法 'android.view.View android.widget.LinearLayout.getChildAt（INT）' （SimpleViewPager.java:243）at android.view.View.layout（View.java:16694）at android.view.ViewGroup.layout（ViewGroup.java:5481）at android.support.constraint.ConstraintLayout.onLayout（ConstraintLayout。在Android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）at android.view.ViewGroup.layout（ViewGroup.java:5481）在android.view.View.layout（View.java:16694） android.view.View.layout（View.java:16694）android.view.ViewGroup.layout（ViewGroup.java:5481）在android.supp中的android.widget.FrameLayout.onLayout（FrameLayout.java:273） ort.v7.widget.RecyclerView $ LayoutManager.layoutDecoratedWithMargins（RecyclerView.java:8994）在android.support.v7.widget.GridLayoutManager.layoutChunk（GridLayoutManager.java:685）在android.support.v7.widget.LinearLayoutManager.fill（ LinearLayoutManager.java:1518）在android.support.v7.widget.LinearLayoutManager.onLayoutChildren（LinearLayoutManager.java:585）在android.support.v7.widget.GridLayoutManager.onLayoutChildren（GridLayoutManager.java:170）在android.support.v7 .widget.RecyclerView.dispatchLayoutStep2（RecyclerView.java:3719）在android.support.v7.widget.RecyclerView.dispatchLayout（RecyclerView.java:3436）在android.support.v7.widget.RecyclerView.onLayout（RecyclerView.java:3988 ）在android.view.View.layout（View.java:16694）在android.view.ViewGroup.layout（ViewGroup.java:5481）在android.widget.RelativeLayout.onLayout（RelativeLayout.java:1079）在android.view .View.layout（View.java:16694）在android.view.ViewGroup.layout（ViewGroup.java:5481）android.widget.FrameLayout.layoutChil 在android.view.View.Group.layout（ViewGroup.java）android.view.View.layout（View.java:16694）android.widget.FrameLayout.onLayout（FrameLayout.java:273）dren（FrameLayout.java:336） ：5481）android.view.ViewGroup.layout（ViewGroup.java:5481）在android.view.View.layout（View.java:16694）android.widget.RelativeLayout.onLayout（RelativeLayout.java:1079） 。android.support.design.widget.ViewOffsetBehavior.onLayoutChild（ViewOffsetBehavior.java:42）at android.support.design.widget.AppBarLayout $ ScrollingViewBehavior.onLayoutChild（HeaderScrollingViewBehavior.java:132）.support.design.widget.HeaderScrollingViewBehavior.layoutChild（HeaderScrollingViewBehavior.java:132） （AppBarLayout.java:1361）在android.view.View.layout（View.java:16694）android.view.ViewGroup.layout（android.support.design.widget.CoordinatorLayout.onLayout（CoordinatorLayout.java:874） ViewGroup.java:5481）在android.view.View.layout（View.java:16694）android.view.ViewGroup.la上的android.support.v4.widget.DrawerLayout.onLayout（DrawerLayout.java:1172） 在android.view.View.layout（View.java）android.widget.FrameLayout.onLayout（FrameLayout.java:273）android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）处的视图（ViewGroup.java:5481） ：16694）在android.view.ViewGroup.layout（ViewGroup.java:5481）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在机器人.widget.LinearLayout.onLayout（LinearLayout.java:1495）at android.view.View.layout（View.java:16694）at android.view.ViewGroup.layout（ViewGroup.java:5481）at android.widget.FrameLayout。在android.view.ViewGroup.layout（ViewGroup.java）的android.view.View.layout（View.java:16694）android.widget.FrameLayout.onLayout（FrameLayout.java:273）layoutchildren（FrameLayout.java:336） ：5481）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）在机器人。视图 .View.layout（View.java:16694）at android.view.ViewGroup.layout（ViewGroup.java:5481
我记得我读过它是一个已知的问题，因为recyclerview和viewpager水平滚动，但我无法找到解决方案。 任何人都可以对此有所了解？
这里是代码 -
ublic class PlacesSearchAdapter extends BaseQuickAdapter<Place,PlacesSearchAdapter.PlaceViewHolder> {
private static String PLACE_PHOTOS_BASE_URL = "https://maps.googleapis.com/maps/api/place/photo?";
public PlacesSearchAdapter(@Nullable List<Place> data) {
super(R.layout.place_item_base_layout,data);
}
@Override
protected void convert(PlaceViewHolder helper, Place item) {
helper.nameTV.setText(item.getName());
helper.addressTV.setText(item.getTextualAddress());
loadThumbs(helper,item);
}
private void loadThumbs(PlaceViewHolder helper, Place item) {
ArrayList<String> photosUrl = new ArrayList<>();
for (Place.PlacePhoto photo:item.getPhotos()) {
StringBuilder builder = new StringBuilder(PLACE_PHOTOS_BASE_URL);
builder.append("maxwidth="+photo.getWidth());
builder.append("&");
builder.append("maxheight="+photo.getHeight());
builder.append("&");
builder.append("photoreference="+photo.getReference());
photosUrl.add(builder.toString());
}
String[] photosArr = photosUrl.toArray(new String[photosUrl.size()]);
helper.photosPager.setImageUrls(photosArr, new ImageURLLoader() {
@Override
public void loadImage(ImageView imageView, String url) {
Picasso.with(imageView.getContext()).load(url).fit().into(imageView);
}
});
}
public class PlaceViewHolder extends BaseViewHolder {
SimpleViewPager photosPager;
TextView nameTV,addressTV;
MaterialFavoriteButton favoriteButton;
public PlaceViewHolder(View view) {
super(view);
nameTV = view.findViewById(R.id.nameTV_placeAdapter);
addressTV = view.findViewById(R.id.addressTV_placeAdapter);
photosPager = view.findViewById(R.id.placeThumb_placeAdapter);
int indicatorColor = Color.parseColor("#ffffff");
int selectedIndicatorColor = Color.parseColor("#fff000");
photosPager.showIndicator(indicatorColor, selectedIndicatorColor);
favoriteButton = view.findViewById(R.id.favoriteButton_placeAdapter);
}
}
}
和我的onViewCreated（） -
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
final CardView searchCard = view.findViewById(R.id.searchCard_searchFrag);
placesRV = view.findViewById(R.id.resultList_searchFrag);
placesRV.setLayoutManager(new GridLayoutManager(placesRV.getContext(),1,GridLayoutManager.HORIZONTAL,false));
assert getActivity()!=null;
placesRV.setNestedScrollingEnabled(true);
placesRV.getLayoutManager().setAutoMeasureEnabled(true);
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