MaterialAppCompatSearchView

activity_search.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/blue" />
</LinearLayout>

menu_search

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:compat="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/search"
        android:icon="@drawable/abc_ic_search_api_mtrl_alpha"
        android:title="Search"
        android:visible="true"
        compat:actionViewClass="android.support.v7.widget.SearchView"
        compat:showAsAction="ifRoom|collapseActionView" />
    
</menu>

SearchActivity.java

public class SearchActivity extends AppCompatActivity {

    Toolbar toolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search);

        toolbar = (Toolbar)findViewById(R.id.toolbar);
        if (toolbar != null) {

            toolbar.setTitle("SearchView");
            setSupportActionBar(toolbar);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_search, menu);
        final SearchView searchView = (SearchView) MenuItemCompat
                .getActionView(menu.findItem(R.id.search));

        SearchManager searchManager = (SearchManager) this.getSystemService(this.SEARCH_SERVICE);
        searchView.setSearchableInfo (searchManager.getSearchableInfo (this.getComponentName()));

        //changing edittext color
        EditText searchEdit = ((EditText)searchView.findViewById(android.support.v7.appcompat.R.id.search_src_text));
        searchEdit.setTextColor(Color.BLACK);
        searchEdit.setHint("Search...");
        searchEdit.setHintTextColor(Color.WHITE);
        searchEdit.setCursorVisible(true);
        searchEdit.setFocusable(true);
        searchEdit.setFocusableInTouchMode(true);

        View v = searchView.findViewById(android.support.v7.appcompat.R.id.search_plate);
        v.setBackgroundColor(Color.parseColor("#00000000"));

        searchView.setOnQueryTextListener(new android.support.v7.widget.SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String s) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {
                return false;
            }
        });
        return true;
    }

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


            case R.id.search:
                return true;

            case android.R.id.home:
                return true;

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