SearchView表示RecyclerView中的RecyclerView

Question

我有一个应用程序，它按类别列出回收视图中的书籍。类别列表是动态的；每个用户将根据其配置文件看到不同的类别。图书列表也在(水平)回收视图中，也是动态的，取决于用户可以访问哪些书籍。

就像这样：

Category 1
<List of books>
Category 2
<List of books>

如何为检索到的所有书籍添加带有自定义适配器的SearchView？

这是我的主要活动。

BrowseBooksActivity它有两个功能：

1. fetchBooks -获取类别列表
2. fetchBooksByCategory -循环遍历类别列表以获得书籍列表 类setContentView(R.layout.browsebooksmain_layout) BrowseBooksActivity : AppCompatActivity() {AppCompatActivity onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) super.onCreate(SavedInstanceState) recyclerview_main.layoutManager = LinearLayoutManager(this) }兴趣fetchBooks (上下文){ val sp = PreferenceManager.getDefaultSharedPreferences(context) val token = sp.getString(PREF_TOKEN，"") val = url + "/tags?type=level“val client =OkHttpClient.Builder().addInterceptor(对象:拦截器{@抛出(IOException：：class)覆盖有趣的拦截(链: Interceptor.Chain)：响应{ val newRequest = chain.request().newBuilder() .addHeader(”授权“)，.build() println(newRequest)返回chain.proceed(newRequest) }).build() val请求= Request.Builder().url(url).build() client.newCall(请求).enqueue(对象:回调{覆盖乐趣onResponse(调用:调用？)响应:响应？){ val jsonData = response?.body()?.string() val gson = GsonBuilder().setPrettyPrinting().create() val tagList: List = gson.fromJson(jsonData，object : TypeToken() {}.type) fetchBooksByCategory(context，tagList) } fetchBooksByCategory (context: Context: Context，列表){ PreferenceManager.getDefaultSharedPreferences(this) sp = sp.getString(PREF_TOKEN，"") val = tagList.size var bookListByGroup: HashMap = HashMap() for ((idx，tag: tag))在tagList.withIndex(){ var tagName = tag.name tagName.replace(“"，"%20") var url = URL + "/me/resources?resourceType.name=version2&tags.name=“+ tagName var client =OkHttpClient.Builder().addInterceptor(对象:拦截器{@抛出(IOException：：class)覆盖有趣的拦截(链: Interceptor.Chain)：响应{ val newRequest = chain.request().newBuilder() .addHeader(”授权“)，( .build()返回chain.proceed(newRequest) }).build() var请求= Request.Builder().url(url).build() client.newCall(请求).enqueue(对象:回调{重写有趣的onResponse(调用:调用？)响应:响应？){ val jsonData = response?.body()?.string() val gson = GsonBuilder().setPrettyPrinting().create() val bookList: List = gson.fromJson(jsonData，object : TypeToken() {}.type) if (bookList.isNotEmpty()) {bookListByGroup！.put(tag.name)，( bookList) } if (idx == (count - 1)) {/ runOnUiThread { recyclerview_main.adapter = BrowseBooksAdapter(context，bookListByGroup) }}}

BrowseBooksAdapter

class BrowseBooksAdapter (val context: Context, val bookListByGroup : HashMap<String, List<ResourcesList>>?): RecyclerView.Adapter<CustomViewHolder>()  {

    override fun getItemCount(): Int {
        return bookListByGroup!!.size
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomViewHolder {
        val layoutInflater = LayoutInflater.from(parent.context)
        val cellForRow = layoutInflater.inflate(R.layout.browsebooks_layout, parent, false)
        return CustomViewHolder(cellForRow)
    }

    override fun onBindViewHolder(holder: CustomViewHolder, position: Int) {

        val keyList = ArrayList(bookListByGroup!!.keys)
        val valueList = ArrayList(bookListByGroup!!.values)

        holder?.v?.book_category.text = keyList[position]
        var booksByCategory : List<ResourcesList>? = valueList[position]

        holder?.v.inner_recyclerview.adapter = BooksByCategoryAdapter(booksByCategory)
        holder?.v.inner_recyclerview.layoutManager = CustomLinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
    }
}

class CustomViewHolder(val v: View): RecyclerView.ViewHolder(v) {

}

BooksByCategoryAdapter

class BooksByCategoryAdapter (val booksByCategory: List<ResourcesList>?): RecyclerView.Adapter<CustomVH>() {

    override fun getItemCount(): Int {
        return booksByCategory!!.count()
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomVH {
        val layoutInflater = LayoutInflater.from(parent.context)
        val cellForRow = layoutInflater.inflate(R.layout.bookcontainer_layout, parent, false)
        return CustomVH(cellForRow)
    }

    override fun onBindViewHolder(holder: CustomVH, position: Int) {
        holder.booksByCategory = booksByCategory!![position]
        Picasso.get().load(booksByCategory!![position].coverURI).into(holder?.v?.inner_bookcover)
    }
}

class CustomVH(val v: View, var booksByCategory : ResourcesList? = null): RecyclerView.ViewHolder(v) {

    init {
        v.setOnClickListener {
            val intent = Intent (v.context, ReadBooksActivity::class.java)
            intent.putExtra("ID", booksByCategory!!.id)
            v.context.startActivity(intent)
        }

    }

}

Answer 1

您的问题还不清楚，但是如果您想显示所有数据，那么如果您想使用自定义适配器按类别进行搜索，则可以使用此方法。

1. 在/res/菜单中添加search_menu.xml <menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" tools:context="com.learn2crack.recyclerviewsearch.MainActivity"> <item android:id="@+id/search" android:icon="@drawable/ic_search" android:title="Search" app:showAsAction="ifRoom|collapseActionView" app:actionViewClass="android.support.v7.widget.SearchView"/> </menu>
2. 将serach_menu附加到活动onCreateOptionsMenu @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.search_menu, menu); MenuItem search = menu.findItem(R.id.search); SearchView searchView = (SearchView) MenuItemCompat.getActionView(search); //Calling function to search the text you entered in your custom adapter search(searchView); }
3. 搜索功能 在搜索菜单中输入文本后将调用此函数。

这里，Old_Adapter是你发送到回收视图来显示内容的适配器。您必须使用与搜索的字符串匹配的数据创建新的适配器对象，并使用此新适配器调用recyclerview。

    private void search(SearchView searchView) {

    searchView.setQueryHint("SOME_CATEGORY"); //Mention what you want to search as hint
    searchView.setInputType(InputType.TYPE_CLASS_TEXT);

    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }


        //Your searched text will appear as newText
        @Override
        public boolean onQueryTextChange(String newText) {

            //Create new object of your custom adapter
            List<AnyAdapter> searchcategory = new ArrayList<>();

            //Old_Adapter is your adapter with which you sent data to your Recyclerview
            for (int x = 0; x < Old_Adapter.size(); x++) {

                //Fetch data from your Old_Adapter
                final AnyAdapter newSearch = Old_Adapter.get(x);
                String cat = newSearch.getCategory();

                //compare the data with searched text add newSearch adapter to new Adapter created earlier  
                if (cat.contains(newText)) {
                    searchcategory.add(newSearch);
                }
            }
            if (newText.isEmpty()) { //If searched text is empty then pass Old_Adapter to your recyclerview again
                callRecyclerview(Old_Adapter);
            } else{ //Else call recyclerview with new Adapter
                callRecyclerview(searchcategory);
            }
            return true;
        }
    });
}