SearchView Android

activity_layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 

 android:id="@+id/sample_main_layout" 

 android:layout_width="match_parent" 

 android:layout_height="match_parent" 

 android:orientation="vertical">

    <SearchView 

 android:id="@+id/searchView" 

 android:layout_width="200dp" 

 android:layout_height="wrap_content" 

 android:layout_gravity="center_horizontal" />
</LinearLayout>

MainActivity

public class MainActivity extends AppCompatActivity {
    SearchView search;

    @Override 

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        search = (SearchView) findViewById(R.id.searchView);
        search.setQueryHint("Search...");
        search.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {

            @Override 

 public void onFocusChange(View v, boolean hasFocus) {
                Toast.makeText(getBaseContext(), String.valueOf(hasFocus),
                        Toast.LENGTH_SHORT).show();
            }
        });
        search.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

            @Override 

 public boolean onQueryTextSubmit(String query) {
                Toast.makeText(getBaseContext(), query,
                        Toast.LENGTH_SHORT).show();
                return false;
            }

            @Override 

 public boolean onQueryTextChange(String newText) {
                Toast.makeText(getBaseContext(), newText,
                        Toast.LENGTH_SHORT).show();
                return false;
            }
        });
    }

}