SearchView doesn't fill the entire width

Question

I'm adding SearchView to my Toolbar by menu:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/action_search"
        android:icon="@drawable/ic_search_white"
        android:orderInCategory="0"
        android:title="@android:string/search_go"
        android:visible="true"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:iconifiedByDefault="false"
        app:showAsAction="always" />
</menu>

I don't know why but SearchView is moved to the right:

Any ideas why is that happening?

Answer 1

I had the same problem, try to add this programmatically:

searchView.setMaxWidth( Integer.MAX_VALUE );

If this doesn't work try to replace the <item> tag to <SearchView>

If using API 20 and above do this
Add this to your styles.xml file:

/*Theme name and parent can be different - depends on the one that already 
declared in you manifest under the tag <application> theme:AppTheme*/
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> /
    <item name="searchViewStyle">@style/SearchView</item>
</style>

<style name="SearchView" parent="Widget.AppCompat.SearchView">
    <item name="android:maxWidth">@dimen/maxSize</item>
</style>
<dimen name="maxSize">1000dp</dimen>

Answer 2

I had the same problem but in my case, it happened that I had a menu drawer icon image in the toolbar (in the layout file) and at the same time had enabled the home button programmatically like so

getSupportActionBar().setDisplayHomeAsUpEnabled(true)

Setting this as false (or removing this code) freed up space for the drawer icon and the SearchView. Hope this helps someone.