How to show menu popup exact below actionbar?

问题

I am working on popup-menu in actionbar. But I am stuck to display exact below of actionbar(cut-to-cut).I am putting two snapshot.

My issue screen shot:

I want exact popup menu below of actionbar as below screenshot

Correction screenshot:

My code snippet:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">
<item android:id="@+id/action_filter"
    android:icon="@drawable/ic_filter_white_18dp"
    android:title="@string/action_filter"
    app:showAsAction="ifRoom" />
<item android:id="@+id/action_label"
    android:icon="@drawable/ic_add_circle_outline_white_18dp"
    android:title="@string/action_label"
    app:showAsAction="ifRoom" />
<item android:id="@+id/action_settings"
    android:title="@string/action_settings"
    app:showAsAction="never" />

回答1:

Set the theme at android manifest to

android:theme="@android:style/Theme.Holo.Light"

回答2:

When working with AppCompat Theme, below code help you.Either Kitkat or Lollipop

Make your style.xml like below

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/black</item>
    <item name="android:background">@android:color/transparent</item>
    <item name="actionOverflowMenuStyle">@style/OverflowMenu</item>
</style>


<style name="OverflowMenu" parent="Widget.AppCompat.PopupMenu.Overflow">
    <item name="android:windowDisablePreview">true</item>
    <item name="overlapAnchor">false</item>
    <item name="android:dropDownVerticalOffset">5.0dp</item>
    <!--<item name="android:popupBackground">#FFF</item>-->
</style>

回答3:

As per my code this is exact sotution by changing style.

<style name="AppTheme" parent="@android:style/Theme.Holo.Light">
    <item name="android:actionBarStyle">@style/MyActionBar</item>
    <item name="android:actionMenuTextColor">@color/text_white</item>
    <item name="android:popupMenuStyle">@style/PopupMenu.Example</item>
    <item name="actionOverflowMenuStyle">@style/OverflowMenu</item>
</style>

<style name="PopupMenu.Example" parent="@android:style/Widget.Holo.Light.ListPopupWindow">
    <item name="android:popupBackground">#efefef</item>
</style>

<style name="OverflowMenu" parent="Widget.AppCompat.PopupMenu.Overflow">
    <!-- Required for pre-Lollipop. -->
    <item name="overlapAnchor">false</item>

    <!-- Required for Lollipop. -->
    <item name="android:overlapAnchor">false</item>
    <item name="android:dropDownVerticalOffset">4.0dip</item>

</style>

回答4:

If you want to keep using ActionBar and AppCompat theme rather than ToolBar or Holo theme, you can use this code:

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <item name="actionOverflowMenuStyle">@style/MyOverflowMenu</item>
</style>

<style name="MyOverflowMenu" parent="Widget.AppCompat.PopupMenu.Overflow">
    <item name="overlapAnchor">false</item>
    <item name="android:overlapAnchor" tools:ignore="NewApi">false</item>
    <item name="android:dropDownVerticalOffset">4.0dip</item>
</style>

This worked for me.

回答5:

You can achieve this by style property overlapAnchor= false

 <style name="toolBarStyle" parent="AppTheme">
        <item name="popupTheme">@style/toolbarPopup</item>
    </style>

    <style name="toolbarPopup" parent="@android:style/Widget.Holo.ListPopupWindow">  <!--ThemeOverlay.AppCompat.Light-->
        <item name="android:popupBackground">#AF0000</item>
        <item name="overlapAnchor">false</item>
        <item name="android:dropDownVerticalOffset">5dp</item>

    </style>

and set that style in AppTheme like below

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!--   to avoid overlay of popup window in toolbar -->
        <item name="actionOverflowMenuStyle">@style/toolBarStyle</item>
</style>

来源：https://stackoverflow.com/questions/34738893/how-to-show-menu-popup-exact-below-actionbar