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I've implemented SearchView inside my toolbar, following Android's official instructions.

SearchView works well itself, but when I tap the search icon, it is shifted to the left instead of showing the Search Hint and Close button, although if I click this "second Search" icon, finally I get the typical search view.

Here is my xml of the toolbar:

<item android:id="@+id/search"

        android:title="@string/search_view"

    app:showAsAction="collapseActionView|ifRoom"

    android:iconTint="@android:color/white"

        android:icon="@drawable/ic_search_white_24dp"

    app:actionViewClass="android.widget.SearchView" />

And my onCreateOptionsMenu

@Override

    public boolean onCreateOptionsMenu(Menu menu) {



        MenuInflater inflater = getMenuInflater();

        inflater.inflate(R.menu.options_menu, menu);



        // Associate searchable configuration with the SearchView

        SearchManager searchManager =

                (SearchManager) getSystemService(Context.SEARCH_SERVICE);

        SearchView searchView =

                (SearchView) menu.findItem(R.id.search).getActionView();



        searchView.setSearchableInfo(

                searchManager.getSearchableInfo(getComponentName()));



        return true;

    }

And my manifest.xml

<activity

            android:name=".Activities.MainActivity"

            android:label="@string/addWordLabel_Act"

            android:launchMode="singleTop"

            android:screenOrientation="portrait">

            <intent-filter>

                <action android:name="android.intent.action.SEARCH"/>

            </intent-filter>

            <meta-data

                android:name="android.app.searchable"

                android:resource="@xml/searchable" />

        </activity>

Finally, here you have some screenshots of the problem:
SearchView before tapping

SearchView after first tap, Here's the problem

SearchView after second tap, "the normal SearchView"

And that's all.

Note: I haven't implemented an Activity/Fragment to handle the Search yet.

Finally, I got the solution. It was easy, but I've spent two days trying to figure it out.

Just, for compatibility issues, use

app:actionViewClass="android.support.v7.widget.SearchView"

instead of app:actionViewClass="android.widget.SearchView"

and, of course, change

SearchManager searchManager =

                (SearchManager) getSystemService(Context.SEARCH_SERVICE);

       SearchView searchView =

                (SearchView) menu.findItem(R.id.search).getActionView();

by

SearchManager searchManager =

                (SearchManager) getSystemService(Context.SEARCH_SERVICE);

        android.support.v7.widget.SearchView searchView =

                (android.support.v7.widget.SearchView) menu.findItem(R.id.search).getActionView();