java - 如何使用底页从片段回调到活动

Question

嘿，我正在使用带有视图寻呼机和两个片段的底部工作表过滤我的项目中的数据床单

这就是我从活动中发送数据的方式

   adapter = new PagerAdapters(this.getSupportFragmentManager(), 
   tabLayout.getTabCount(),_id);

并在片段中使用构造函数接收数据

  public Filterfragment(String _id) {
    this._id = _id;
}

我正在使用 recyclerview 来显示这样的数据

那么如何将项目的 id 发送到活动，以便在单击应用按钮时重新加载我的 recyclerview 数据。

  <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/bottom_sheet"
    android:background="@android:color/white"
    app:behavior_peekHeight="0dp"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
    android:orientation="vertical">

    <android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        app:tabGravity="fill"
        app:tabMode="fixed"
        app:tabPadding="0dp"/>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_below="@id/tabs"
        android:layout_above="@id/applyBtn"
        android:layout_height="match_parent"
        />

    <Button
        android:id="@+id/applyBtn"
        android:layout_width="match_parent"
        android:text="Apply"
        android:layout_alignParentBottom="true"
        android:layout_height="wrap_content" />

</RelativeLayout>

这是主要的 recyclerview 适配器

public class FilterAdapter extends RecyclerView.Adapter<FilterAdapter.FilterViewHolder>  {
    private static final String TAG = "FilterAdapter";
    Context context;
    List<TagTypeResult> tagTypeModels;
    public static int current_pos = -1;
    TagAdapter tagAdapter;
    int rotationAngle = 0;
    public FilterAdapter(Context context, List<TagTypeResult> tagTypeModels) {
        this.context = context;
        this.tagTypeModels = tagTypeModels;
    }

    @NonNull
    @Override
    public FilterViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int i) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.filter_row_item,parent,false);
        return new FilterAdapter.FilterViewHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull FilterViewHolder filterViewHolder, int i) {
        TagTypeResult tagTypeModel = tagTypeModels.get(i);
        filterViewHolder.txt.setText(tagTypeModel.getName());

        filterViewHolder.sub_list_recycler.setVisibility(View.GONE);


        if (tagTypeModel.getTagsLists() != null) {
            if (tagTypeModel.getTagsLists().size() <= 0) {
                filterViewHolder.arrow.setVisibility(View.GONE);
                filterViewHolder.arrow.setRotationX(180);
            } else {
                filterViewHolder.arrow.setVisibility(View.VISIBLE);
                filterViewHolder.arrow.setRotationX(0);
            }
        }else {
            filterViewHolder.arrow.setVisibility(View.GONE);

        }


        tagAdapter = new TagAdapter(context, tagTypeModel.getTagsLists(), new TagInterface() {
            @Override
            public void tagClick(View view, int pos, String tagID) {

                Log.d(TAG, "tagClick: "+tagID);


            }
        });
        filterViewHolder.sub_list_recycler.setAdapter(tagAdapter);
        tagAdapter.notifyDataSetChanged();


        if (current_pos == filterViewHolder.getAdapterPosition()){
            if (filterViewHolder.sub_list_recycler.getVisibility() == View.GONE) {
                filterViewHolder.sub_list_recycler.setVisibility(View.VISIBLE);
            }else {
                filterViewHolder.sub_list_recycler.setVisibility(View.GONE);

            }
        }else {
            Log.i(TAG, "onBindViewHolder: sublist gone "+tagTypeModel.getName());
            filterViewHolder.sub_list_recycler.setVisibility(View.GONE);
        }

    }

    @Override
    public int getItemCount() {
        return tagTypeModels.size();
    }

    class FilterViewHolder extends RecyclerView.ViewHolder {
        TextView txt;
        ImageView arrow;
        RecyclerView sub_list_recycler;
        RelativeLayout linearLayout;
        FilterViewHolder(@NonNull View itemView) {
            super(itemView);
            txt = itemView.findViewById(R.id.txt);
            arrow = itemView.findViewById(R.id.arrow);
            linearLayout = itemView.findViewById(R.id.main_cat_lay);

            linearLayout.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Log.i(TAG, "onClick: "+current_pos);

                    if (current_pos != getAdapterPosition()) {
                        current_pos = getAdapterPosition();
                        notifyDataSetChanged();
                    }
                    else{
                        current_pos = -1;
                        notifyDataSetChanged();
                    }
                }
            });

            sub_list_recycler = itemView.findViewById(R.id.sub_list_recycler);
            RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(context) {
                @Override
                public boolean canScrollVertically() {
                    return false;
                }
            };
            sub_list_recycler.setLayoutManager(mLayoutManager);
            sub_list_recycler.addItemDecoration(new SimpleDividerItemDecoration(context));
        }
    }
}

子 recyclerView 适配器：

public class TagAdapter extends RecyclerView.Adapter<TagAdapter.TagViewHolder> {
    private static final String TAG = "SublistAdapter";
    Context context;
    List<TagsList> tagsLists;
    int pos = -1;
    TagInterface tagInterface;

    public TagAdapter(Context context, List<TagsList> tagsLists,TagInterface tagInterface) {
        this.context = context;
        this.tagsLists = tagsLists;
        this.tagInterface = tagInterface;
    }

    @NonNull
    @Override
    public TagViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int i) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.tag_item,parent,false);
        return new TagAdapter.TagViewHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull TagViewHolder tagViewHolder, int i) {

        TagsList tagsList = tagsLists.get(i);
        tagViewHolder.tagtxt.setText(tagsList.getName());

        if (tagsList.isChecked()){
            tagViewHolder.tagName.setChecked(true);
        }else {
            tagViewHolder.tagName.setChecked(false);

        }

    }

    @Override
    public int getItemCount() {
        return tagsLists.size();
    }

    public class TagViewHolder extends RecyclerView.ViewHolder {
        TextView tagtxt;
        CheckBox tagName;
        RelativeLayout childClik;

        public TagViewHolder(@NonNull View itemView) {
            super(itemView);

            //pri_txt = itemView.findViewById(R.id.pri_txt);
            tagName = itemView.findViewById(R.id.tagName);
            tagtxt = itemView.findViewById(R.id.tagtxt);
            childClik = itemView.findViewById(R.id.childClik);
            tagName.setEnabled(false);
            childClik.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    boolean isChecked = true;
                    if (isChecked)
                    {
                        tagsLists.get(getAdapterPosition()).setChecked(true);
                        tagName.setChecked(true);
                        tagInterface.tagClick(v,getAdapterPosition(),tagsLists.get(getAdapterPosition()).get_id());
                        Toast.makeText(context, "[pos]"+tagsLists.get(getAdapterPosition()).get_id(), Toast.LENGTH_SHORT).show();
                    }else
                        {
                            tagsLists.get(getAdapterPosition()).setChecked(false);
                            tagName.setChecked(false);
                        }

                }
            });


        }
    }
}

标签： javaandroidandroid-recyclerviewbottom-sheet