public class MainActivity extends AppCompatActivity {

    TextView textView;
    SearchView searchView;

    private static final int DELAY = 1000;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView = findViewById(R.id.receiving_text);

        workWithIntent();
    }

    private void workWithIntent() {
        final Intent intent = getIntent();
        String action = intent.getAction();
        String type = intent.getType();

        if (Intent.ACTION_SEND.equals(action) && type != null) {
            if ("text/plain".equals(type)) {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        String receivedText = intent.getStringExtra(Intent.EXTRA_TEXT);
                        textView.setText(receivedText);

                        searchView.setQuery(receivedText, true);
                        searchView.setFocusable(true);
                        searchView.setIconified(false);
                        searchView.clearFocus();
                    }
                }, DELAY);
            }
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);

        MenuItem item = menu.findItem(R.id.action_search);

        searchView = (SearchView) item.getActionView();
        return super.onCreateOptionsMenu(menu);
    }
}