c# - How to show navigation bar in my android app created with unity -

i'm creating android app unity. although deleted statement

androidmanifest.xml

android:theme="@android:style/theme.notitlebar" 

it's still not showing navigation bar in app. can me someone?

folder path myunityproject/assets/plugins/android/androidmanifest.xml , androidmanifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest     xmlns:android="http://schemas.android.com/apk/res/android"     package="com.unity3d.player"     android:installlocation="preferexternal"     android:versioncode="1"     android:versionname="1.0">     <uses-sdk android:minsdkversion="14" android:targetsdkversion="22" />     <uses-feature android:name="android.hardware.camera" />     <supports-screens         android:smallscreens="true"         android:normalscreens="true"         android:largescreens="true"         android:xlargescreens="true"         android:anydensity="true"/>     <uses-permission android:name="android.permission.internet" />     <uses-permission android:name="android.permission.camera" />     <uses-permission android:name="android.permission.access_network_state"/>     <uses-permission android:name="android.permission.write_external_storage" />     <uses-permission android:name="android.permission.access_fine_location"/>      <application         android:icon="@drawable/app_icon"         android:label="@string/app_name"         >         <activity android:name="com.unity3d.player.unityplayernativeactivity"                   android:label="@string/app_name">             <intent-filter>                 <action android:name="android.intent.action.main" />                 <category android:name="android.intent.category.launcher" />             </intent-filter>             <meta-data android:name="unityplayer.unityactivity" android:value="true" />             <meta-data android:name="unityplayer.forwardnativeeventstodalvik" android:value="false" />         </activity>         <activity android:name="com.unity3d.player.videoplayer"                   android:label="@string/app_name"                   android:screenorientation="portrait"                   android:configchanges="fontscale|keyboard|keyboardhidden|locale|mnc|mcc|navigation|orientation|screenlayout|screensize|smallestscreensize|uimode|touchscreen">          </activity>         <!--             support devices using ti s3d library stereo mode must             add following library.             devices require are: odg x6         -->         <uses-library android:name="com.ti.s3d" android:required="false" />         <!--             support odg r7 in stereo mode must add following library.         -->         <uses-library android:name="com.osterhoutgroup.api.ext" android:required="false" />     </application> </manifest>  <!-- android:installlocation="preferexternal" -->