Android ContextMenu - does not show

When you click on the buttons in the Genymotion emulator, instead of opening the context menu, there is no reaction. There is no error in the logs. Checked on a standard emulator, the same error. What could be the problem?

Main Activity:

package com.example.hasanshans.segundo; import android.graphics.Color; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.ContextMenu; import android.view.View; import android.view.Menu; import android.view.MenuItem; import android.widget.Button; import android.widget.TextView; public class MainActivity extends AppCompatActivity { Button tvColor, tvSize; final int MENU_COLOR_GREEN = 1; final int MENU_COLOR_BLUE = 2; final int MENU_COLOR_RED = 3; final int MENU_SIZE_22 = 4; final int MENU_SIZE_26 = 5; final int MENU_SIZE_30 = 6; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tvColor = (Button) findViewById(R.id.tvColor); tvSize = (Button) findViewById(R.id.tvSize); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); tvColor.setOnCreateContextMenuListener(this); registerForContextMenu(tvSize); setSupportActionBar(toolbar); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { switch (v.getId()){ case R.id.tvColor: menu.add(0,MENU_COLOR_BLUE, 0, "BLUE"); menu.add(0,MENU_COLOR_RED, 0, "RED"); menu.add(0,MENU_COLOR_GREEN, 0, "GREEN"); break; case R.id.tvSize: menu.add(0,MENU_SIZE_22, 0, "22"); menu.add(0, MENU_SIZE_26, 0, "26"); menu.add(0,MENU_SIZE_30, 0, "30"); break; } } @Override public boolean onContextItemSelected(MenuItem item) { switch (item.getItemId()) { case MENU_COLOR_RED: tvColor.setTextColor(Color.RED); tvColor.setText("Text color = red"); break; case MENU_COLOR_GREEN: tvColor.setTextColor(Color.GREEN); tvColor.setText("Text color = green"); break; case MENU_COLOR_BLUE: tvColor.setTextColor(Color.BLUE); tvColor.setText("Text color = blue"); break; // пункты меню для size case MENU_SIZE_22: tvSize.setTextSize(22); tvSize.setText("Text size = 22"); break; case MENU_SIZE_26: tvSize.setTextSize(26); tvSize.setText("Text size = 26"); break; case MENU_SIZE_30: tvSize.setTextSize(30); tvSize.setText("Text size = 30"); break; } return super.onContextItemSelected(item); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } } 

xml:

 <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="New Button" android:id="@+id/tvColor" android:layout_below="@+id/toolbar" android:layout_centerHorizontal="true" android:layout_marginTop="66dp" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="New Button" android:id="@+id/tvSize" android:layout_below="@+id/tvColor" android:layout_centerHorizontal="true" android:layout_marginTop="63dp" /> </RelativeLayout>