android - Imageview not showing on Lollipop and Marshmallow -

i have simple activity , xml shows .png file fills whole activity. have tested in kitkat , ice cream. working. not working on lollipop , marshmallow. i've check other answers not 1 looking for. activity simple one.

help activity

package com.pointwest.timetrackermobilelog.activities;  import android.content.intent; import android.os.bundle; import android.support.v7.app.appcompatactivity;  import com.pointwest.timetrackermobilelog.r;   public class helpactivity extends appcompatactivity {       @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_help_material);          getsupportactionbar().setdisplayhomeasupenabled(true);         getsupportactionbar().sethomebuttonenabled(true);      }      @override     public void onbackpressed() {         super.onbackpressed();         intent mainintent = new intent(this, mainactivity.class);         startactivity(mainintent);     }  } 

activity_help_material.xml

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical"     android:gravity="fill"     android:background="@color/blue_main"     tools:context="com.pointwest.timetrackermobilelog.activities.loginactivity">      <imageview         android:layout_width="fill_parent"         android:layout_height="fill_parent"         android:scaletype="fitxy"         android:src="@drawable/help"/>  </linearlayout> 

those 2 files.

androidmanifest.xml this

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.pointwest.timetrackermobilelog" >      <uses-permission android:name="android.permission.internet" />      <uses-permission android:name="android.permission.access_network_state" />      <uses-permission android:name="android.permission.get_accounts" />      <uses-permission android:name="android.permission.use_credentials" />      <!-- permission required use alarm manager -->     <uses-permission android:name="com.android.alarm.permission.set_alarm"/>      <application         android:name=".webservices.applicationclass"         android:allowbackup="true"         android:icon="@mipmap/tt_app_icon"         android:label="@string/app_name"         android:theme="@style/apptheme" >         <meta-data             android:name="com.google.android.gms.version"             android:value="@integer/google_play_services_version" />         <meta-data             android:name="com.google.android.gms.analytics.globalconfigresource"             android:value="@xml/pointwest_tracker" />          <activity             android:name=".activities.loginactivity"             android:screenorientation="portrait"             android:label="@string/app_name" >             <meta-data                 android:name="android.support.parent_activity"                 android:value=".activities.openingactivity" />         </activity>         <activity             android:name=".activities.mainactivity"             android:label="@string/available_title"             android:configchanges="orientation|keyboardhidden"             android:screenorientation="portrait"             android:parentactivityname=".activities.loginactivity" >             <meta-data                 android:name="android.support.parent_activity"                 android:value=".activities.loginactivity" />         </activity>         <activity             android:name=".activities.openingactivity"             android:screenorientation="portrait"             android:configchanges="orientation|keyboardhidden"             android:label="@string/app_name" >             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity>         <activity             android:name=".activities.demoactivity"             android:screenorientation="portrait"             android:configchanges="orientation|keyboardhidden"             android:label="@string/title_activity_demo" >         </activity>         <activity             android:name=".activities.chooseactivity"             android:label="@string/title_activity_choose"             >         </activity>          <activity             android:name=".activities.reminderactivity"             android:screenorientation="portrait"             android:label="@string/title_reminder_activity">         <meta-data             android:name="android.support.parent_activity"             android:value=".activities.mainactivity" />      </activity>      <activity         android:name=".activities.helpactivity"         android:screenorientation="portrait"         android:label="@string/title_help">          <meta-data             android:name="android.support.parent_activity"             android:value=".activities.mainactivity" />      </activity>      <service         android:name="com.pointwest.timetrackermobilelog.businessservices.connectivityoutsideappservice"         android:exported="false"/>       <!--register alarm receiver -->     <receiver android:name="com.pointwest.timetrackermobilelog.utilities.notificationreceiver"         android:enabled="true" />      <receiver android:name="com.pointwest.timetrackermobilelog.utilities.connectivityoutsideappreceiver"         android:enabled="true"         android:process=":remote">          <intent-filter android:priority="1000" >             <action android:name="android.net.conn.connectivity_change"/>         </intent-filter>     </receiver>    </application> 

finally, build.gradle

apply plugin: 'com.android.application'  android {     compilesdkversion 23     buildtoolsversion "23.0.1"      defaultconfig {         applicationid "com.pointwest.timetrackermobilelog"         vectordrawables.usesupportlibrary = true         minsdkversion 15         targetsdkversion 23         versioncode 32         versionname "1.0"         multidexenabled true     }      repositories {         maven { url "https://jitpack.io" }         jcenter()     }      buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     }      ext {         supportlibversion = '23.2'  // variable can referenced keep support libs consistent     }  //    dexoptions { //        predexlibraries = false //        javamaxheapsize "4g" // use gig increments depending on needs //        incremental true //    } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])     compile 'com.android.support:appcompat-v7:23.2.+'     compile 'com.android.support:design:23.2.+'     compile 'com.android.support:cardview-v7:23.2.+'     compile 'com.android.support:recyclerview-v7:23.2.+'     compile "com.android.support:support-v4:23.2.+"     compile 'com.squareup.retrofit:retrofit:1.9.0'     compile 'com.jpardogo.materialtabstrip:library:1.1.0'     compile 'com.google.android.gms:play-services:8.4.0'     compile 'io.realm:realm-android:0.82.0'     compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0'     compile 'com.squareup.okhttp:okhttp:2.0.0'     compile 'com.android.support:multidex:1.0.0' //    compile 'com.github.navasmdc:materialdesign:1.5@aar'     compile 'com.h6ah4i.android.materialshadowninepatch:materialshadowninepatch:0.6.3'     compile 'me.zhanghai.android.materialprogressbar:library:1.1.5'     compile 'com.code-troopers.betterpickers:library:2.5.3'   } 

here's project structure

move drawable drawable folder drawable-nodpi folder