How to use SearchView in Toolbar Android

You have to use Appcompat library for that. Which is used like below:

dashboard.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"       xmlns:tools="http://schemas.android.com/tools"      xmlns:app="http://schemas.android.com/apk/res-auto">    <item        android:id="@+id/action_search"        android:icon="@android:drawable/ic_menu_search"        app:showAsAction="always|collapseActionView"        app:actionViewClass="androidx.appcompat.widget.SearchView"        android:title="Search"/></menu>

Activity file (in Java):

public boolean onCreateOptionsMenu(Menu menu) {    MenuInflater menuInflater = getMenuInflater();    menuInflater.inflate(R.menu.dashboard, menu);     MenuItem searchItem = menu.findItem(R.id.action_search);    SearchManager searchManager = (SearchManager) MainActivity.this.getSystemService(Context.SEARCH_SERVICE);    SearchView searchView = null;    if (searchItem != null) {        searchView = (SearchView) searchItem.getActionView();    }    if (searchView != null) {        searchView.setSearchableInfo(searchManager.getSearchableInfo(MainActivity.this.getComponentName()));    }        return super.onCreateOptionsMenu(menu);}

Activity file (in Kotlin):

override fun onCreateOptionsMenu(menu: Menu?): Boolean {    menuInflater.inflate(R.menu.menu_search, menu)    val searchItem: MenuItem? = menu?.findItem(R.id.action_search)    val searchManager = getSystemService(Context.SEARCH_SERVICE) as SearchManager    val searchView: SearchView? = searchItem?.actionView as SearchView    searchView?.setSearchableInfo(searchManager.getSearchableInfo(componentName))    return super.onCreateOptionsMenu(menu)}

manifest file:

<meta-data       android:name="android.app.default_searchable"       android:value="com.apkgetter.SearchResultsActivity" />         <activity            android:name="com.apkgetter.SearchResultsActivity"            android:label="@string/app_name"            android:launchMode="singleTop" >            <intent-filter>                <action android:name="android.intent.action.SEARCH" />            </intent-filter>            <intent-filter>                <action android:name="android.intent.action.VIEW" />            </intent-filter>            <meta-data                android:name="android.app.searchable"                android:resource="@xml/searchable" />        </activity>

searchable xml file:

<?xml version="1.0" encoding="utf-8"?><searchable xmlns:android="http://schemas.android.com/apk/res/android"    android:hint="@string/search_hint"    android:label="@string/app_name" />

And at last, your SearchResultsActivity class code. for showing result of your search.

If you would like to setup the search facility inside your Fragment, just add these few lines:

Step 1 - Add the search field to you toolbar:

<item    android:id="@+id/action_search"    android:icon="@android:drawable/ic_menu_search"    app:showAsAction="always|collapseActionView"    app:actionViewClass="android.support.v7.widget.SearchView"    android:title="Search"/>

Step 2 - Add the logic to your onCreateOptionsMenu()

import android.support.v7.widget.SearchView; // not the default !@Overridepublic boolean onCreateOptionsMenu( Menu menu) {    getMenuInflater().inflate( R.menu.main, menu);    MenuItem myActionMenuItem = menu.findItem( R.id.action_search);    searchView = (SearchView) myActionMenuItem.getActionView();    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {        @Override        public boolean onQueryTextSubmit(String query) {            // Toast like print            UserFeedback.show( "SearchOnQueryTextSubmit: " + query);            if( ! searchView.isIconified()) {                searchView.setIconified(true);            }            myActionMenuItem.collapseActionView();            return false;        }        @Override        public boolean onQueryTextChange(String s) {            // UserFeedback.show( "SearchOnQueryTextChanged: " + s);            return false;        }    });    return true;}

If you want to add it directly in the toolbar.

<?xml version="1.0" encoding="utf-8"?><android.support.design.widget.AppBarLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content">    <android.support.v7.widget.Toolbar        android:id="@+id/app_bar"        android:layout_width="match_parent"        android:layout_height="wrap_content">        <SearchView            android:id="@+id/searchView"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:iconifiedByDefault="false"            android:queryHint="Search"            android:layout_centerHorizontal="true" />    </android.support.v7.widget.Toolbar></android.support.design.widget.AppBarLayout>