搜索图标未显示在工具栏中

Question

我在我的应用程序中有几个搜索视图，我想在另一个片段中实现它，我复制并粘贴它所在的其他片段中的所有内容，显然更改变量等等，因为它不会导致冲突或其他事情和我的app运行正常，工具栏显示但不是我的searchview，一旦我从tab更改为tab并返回此片段现在显示，我不知道为什么，请任何帮助都会很棒

menu_main.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=".ManageFragments.MainActivity">

        <item
            android:id="@+id/action_search"
            android:icon="@android:drawable/ic_menu_search"
            android:title="@string/action_search"
            app:actionViewClass="android.support.v7.widget.SearchView"
            app:showAsAction="always"/>
</menu>

Search_view.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@color/GrayBackground"
    tools:context=".HomeFragments.SearchFragment">

    <android.support.v7.widget.Toolbar
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/toolbar"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:minHeight="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/Theme.AppCompat.Light"
        app:theme="@style/ThemeOverlay.AppCompat.ActionBar" />

        <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textStyle="bold"
        android:textColor="@android:color/black"
        android:layout_gravity="clip_vertical"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:visibility="invisible" />

</RelativeLayout>
    </ScrollView>
</LinearLayout>

分段

  final MenuItem mSearchMenuItem = menu.findItem(R.id.action_search);
        final SearchView searchView = (SearchView) mSearchMenuItem.getActionView();
        //final SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
        searchView.setQueryHint(getText(R.string.search));
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener()
        {
            @Override
            public boolean onQueryTextSubmit( String query)
            {
                final GifTextView loading = (GifTextView)FeedsFragment.this.getActivity().findViewById(R.id.loadingSearch);
                final TextView loadingText = (TextView)FeedsFragment.this.getActivity().findViewById(R.id.loadingTextSearch);
                final ImageView loadingBackground = (ImageView)FeedsFragment.this.getActivity().findViewById(R.id.imgGrayBackgroundSearch);
                loading.setVisibility(View.VISIBLE);
                loadingText.setVisibility(View.VISIBLE);
                loadingBackground.setVisibility(View.VISIBLE);
                //Toast.makeText(SearchFragment.this.getActivity(), R.string.buscado, Toast.LENGTH_SHORT).show();
                searchView.setQuery("", false);
                searchView.setIconified(true);
                new PlifRequestBase(getActivity()){
                    @Override
                    public JsonObject onHttpOk(JsonObject response) throws JSONException
                    {
                        JsonObject data, pagination_details = null, businesses, cover_premium, cv, iurl;
                        JsonArray premiums, basics;
                        if (response.get("pagination") == null)
                        {
                            data =  response;
                        }else {
                            pagination_details = response.get("pagination").getAsJsonObject();
                            data = response.get("data").getAsJsonObject();

                            businesses = data.get("businesses").getAsJsonObject();
                            premiums = businesses.get("premiums").getAsJsonArray();
                            basics = businesses.get("basics").getAsJsonArray();

                            gson = new Gson();
                            arrayBusiness = new ArrayList<Business>();
                            arrayBasics= new ArrayList<Business>();

                            arrayBusiness = gson.fromJson(premiums, BUSINESS_TYPE);
                            arrayBasics=gson.fromJson(basics, BUSINESS_TYPE);
                            Log.d("size", String.valueOf(arrayBusiness.size()));
                            //Log.d("", String.valueOf(images_premiums));
                            if (getActivity() == null)
                                return response;
                            FeedsFragment.this.getActivity().runOnUiThread(new Runnable()
                            {
                                @Override
                                public void run() {

                                    RecyclerView recycler = (RecyclerView) FeedsFragment.this.getActivity().findViewById(R.id.high_recycler_view);
                                    RecyclerView recyclerbasics=(RecyclerView) FeedsFragment.this.getActivity().findViewById(R.id.lower_recycler_view);

                                    SearchHorizontalAdapter adapter = new SearchHorizontalAdapter(getActivity(), arrayBusiness, R.layout.search_high_layout);
                                    SearchVerticalAdapter adapterbasics=new SearchVerticalAdapter(getActivity(),arrayBasics,R.layout.search_low_layout);

                                    recyclerbasics.setNestedScrollingEnabled(false);
                                    recycler.setNestedScrollingEnabled(false);

                                    mLowerLayoutManager = new GridLayoutManager(FeedsFragment.this.getActivity(),2);
                                    recyclerbasics.setLayoutManager(mLowerLayoutManager);
                                    recyclerbasics.setAdapter(adapterbasics);

                                    mLayoutManagera = new LinearLayoutManager(FeedsFragment.this.getActivity(), LinearLayoutManager.HORIZONTAL, false);
                                    recycler.setLayoutManager(mLayoutManagera);
                                    recycler.setAdapter(adapter);

                                    for (int i = 0; i < arrayBusiness.size(); i++)
                                    {
                                        Log.d("Imprime", arrayBusiness.get(i).getName());
                                    }
                                    for (int i = 0; i < arrayBasics.size(); i++)
                                    {
                                        Log.d("Imprime", arrayBasics.get(i).getName());
                                    }


                                    loading.setVisibility(View.GONE);
                                    loadingText.setVisibility(View.GONE);
                                    loadingBackground.setVisibility(View.GONE);
                                }
                            });
                        }
                        if (pagination_details.isJsonNull()){
                            Log.d("Paginacion", pagination_details.toString());
                        }

                        return data;

                    }
                    @Override
                    public void onHttpCreate(JsonObject response) throws JSONException
                    {

                    }

                    @Override
                    public void onHttpUnprocessableEntity(JsonObject response) throws JSONException {
                        this.cancel(true);
                        final String error = response.get("errors").toString();
                        getActivity().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(getActivity().getApplicationContext(), error, Toast.LENGTH_LONG).show();
                            }
                        });
                    }
                }.execute("businesses/search", "GET", "q", "\'"+query.replaceAll(" ","&").trim()+"\'");

                return true;

            }

            @Override
            public boolean onQueryTextChange(String newText) {
                textView.setText(newText);
                return true;
            }
        });

        View searchPlate = (View) searchView.findViewById(android.support.v7.appcompat.R.id.search_plate);
        searchPlate.setBackgroundResource(R.mipmap.textfield_custom);

        //return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {


            default:
                return super.onOptionsItemSelected(item);
        }
    }

编辑 http://imgur.com/a/WPnsq这是我遇到问题的地方，它没有显示

http://imgur.com/a/WcxNy在这里我从一个标签移动到另一个标签并返回，现在它正在显示