material-components_material-components-android/docs/components/Menu.md

Menu

Design & API Documentation

• Material Design guidelines: Menus

Material Styles

The MaterialComponents theme provides styling for overflow, contextual and popup menus. Just use any Theme.MaterialComponents.* theme or add the widget styles to your theme:

<item name="popupMenuStyle">@style/Widget.MaterialComponents.PopupMenu</item>
<item name="android:contextPopupMenuStyle">@style/Widget.MaterialComponents.PopupMenu.ContextMenu</item>
<item name="actionOverflowMenuStyle">@style/Widget.MaterialComponents.PopupMenu.Overflow</item>

For information on the Exposed Dropdown Menu, see its specific section below.

Overflow Menus

The following will provide the Material style through the actionOverflowMenuStyle theme attribute.

res/menu/custom_menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/search"
          android:icon="@drawable/ic_search"
          android:title="@string/search_label"
          android:showAsAction="ifRoom"/>
    <item android:id="@+id/help"
          android:icon="@drawable/ic_help"
          android:title="@string/help_label" />
</menu>

MainActivity.java

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.custom_menu, menu);
    return true;
}

Popup Menus

Inflating menus via PopupMenu will also have have the right styling through the popupMenuStyle theme attribute.

public boolean showMenu(View anchor) {
    PopupMenu popup = new PopupMenu(this, anchor);
    popup.getMenuInflater().inflate(R.menu.custom_menu, popup.getMenu());
    popup.show();
}

Exposed Dropdown Menus

The Exposed Dropdown Menu is implemented via the use of the TextInputLayout. For detailed information on how Material text fields work, see the TextInputLayout documentation.

Usage

In order to create an Exposed Dropdown Menu, you will need to use a TextInputLayout with a Widget.MaterialComponents.TextInputLayout.*.ExposedDropdownMenu style. Additionally, the TextInputLayout should have an AutoCompleteTextView as its direct child.

res/layout/dropdown_menu.xml

<com.google.android.material.textfield.TextInputLayout
    style="@style/Widget.MaterialComponents.TextInputLayout.FilledBox.ExposedDropdownMenu"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/hint_text">

  <AutoCompleteTextView
      android:id="@+id/filled_exposed_dropdown"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"/>

</com.google.android.material.textfield.TextInputLayout>

You will also need an item layout resource to populate the dropdown popup. The example below provides a layout that follows the Material Design guidelines.

res/layout/dropdown_menu_popup_item.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="16dp"
    android:ellipsize="end"
    android:maxLines="1"
    android:textAppearance="?attr/textAppearanceSubtitle1"/>

Finally, you will need to set the AutoCompleteTextView's adapter.

MainActivity.java

String[] COUNTRIES = new String[] {"Item 1", "Item 2", "Item 3", "Item 4"};

ArrayAdapter<String> adapter =
        new ArrayAdapter<>(
            getContext(),
            R.layout.dropdown_menu_popup_item,
            COUNTRIES);

AutoCompleteTextView editTextFilledExposedDropdown =
    view.findViewById(R.id.filled_exposed_dropdown);
editTextFilledExposedDropdown.setAdapter(adapter);

The example above will provide an editable filled Exposed Dropdown Menu.

Note: In order to have a non editable variation of the menu, you should disable user input in the AutoCompleteTextView. That can be achieved by setting android:editable="false" on the AutoCompleteTextView.

Variations

Filled

As seen above, apply this style to your TextInputLayout:

style="@style/Widget.MaterialComponents.TextInputLayout.FilledBox.ExposedDropdownMenu"`

Outlined

Apply this style to your TextInputLayout:

style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.ExposedDropdownMenu"`

Dense Filled

Apply this style to your TextInputLayout:

style="@style/Widget.MaterialComponents.TextInputLayout.FilledBox.Dense.ExposedDropdownMenu"`

Dense Outlined

Apply this style to your TextInputLayout:

style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox.Dense.ExposedDropdownMenu"`