layout - Android : Button Error. Visible in Marshmallow Not seen in Kitkat AVD? -


i'm developing android application music player. here in tabbed layout have placed botton. while running project button shown in marshmallow avd . while running same programme on kitkat avd button not seen .. can 1 me find error ..?

my xml code,......

<linearlayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:fitssystemwindows="true"     android:orientation="vertical">      <android.support.v7.widget.toolbar         xmlns:android="http://schemas.android.com/apk/res/android"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:background="@color/material_blue_grey_800"         android:id="@+id/toolbar"         android:theme="@style/themeoverlay.appcompat.dark.actionbar"         app:title="millenium   audios" />      <android.support.v4.widget.drawerlayout         xmlns:android="http://schemas.android.com/apk/res/android"         xmlns:app="http://schemas.android.com/apk/res-auto"         android:layout_height="match_parent"         android:layout_width="match_parent"         android:id="@+id/drawerlayout"         >            <framelayout             android:orientation="vertical"              android:layout_width="match_parent"             android:layout_height="match_parent"             android:id="@+id/containerview">              <button                 android:layout_width="403dp"                 android:layout_height="wrap_content"                 android:text="new button"                 android:id="@+id/button"                 android:onclick="clikplayer"                 android:layout_gravity="left|bottom" />         </framelayout>            <android.support.design.widget.navigationview             xmlns:android="http://schemas.android.com/apk/res/android"             xmlns:app="http://schemas.android.com/apk/res-auto"             android:layout_width="wrap_content"             android:layout_height="match_parent"             android:layout_gravity="start"             android:id="@+id/shitstuff"             app:itemtextcolor="@color/black"             app:menu="@menu/drawermenu"             android:layout_margintop="-24dp"             />        </android.support.v4.widget.drawerlayout>   </linearlayout>


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