MockView cannot be added to android.view.ViewGroup in xml
When checking in graphical layout, I get this error:
Exception thrown on rendering: com.android.layoutlib.bridge.MockView cannot be dropped android.view.ViewGroup
Below I posted my activity_main.xml code:
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textviewHeading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:fontFamily="fonts/Dosis.otf"
android:text="@string/heading_chapter"
android:textSize="25dp"
android:visibility="gone" />
<ListView
android:id="@+id/listviewChapters"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@+id/imageviewBanner"
android:layout_below="@+id/textviewHeading"
android:layout_marginTop="5dp" >
</ListView>
<ImageView
android:id="@+id/imageviewBanner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:src="@drawable/banner"
android:visibility="invisible" />
</RelativeLayout>
<ListView
android:id="@+id/list_slidermenu"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="@color/list_divider"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_selector"
android:background="@color/list_background"/>
</android.support.v4.widget.DrawerLayout>
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This error occurred due to incorrect implementation of the box layout. I am putting three straight layouts in the drawer layout where the error will occur. According to google doc he took two layouts directly.
In the drawer layout, if I placed two straight layouts solved the problem. So I am using the frame layout as the parent layout below the Drawer Layout and then finally add a list view to display the navigation drawer.
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="@+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:id="@+id/container"
android:layout_width="wrap_content"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textviewHeading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:fontFamily="fonts/Dosis.otf"
android:text="@string/heading_chapter"
android:textSize="25sp"
android:visibility="gone" />
<ListView
android:id="@+id/listviewChapters"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="@+id/imageviewBanner"
android:layout_below="@+id/textviewHeading"
android:layout_marginTop="5dp" >
</ListView>
<ImageView
android:id="@+id/imageviewBanner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:src="@drawable/banner"
android:visibility="invisible" />
</RelativeLayout>
</FrameLayout>
<ListView
android:id="@+id/list_slidermenu"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="@color/list_background"
android:choiceMode="singleChoice"
android:divider="@color/list_divider"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_selector" />
</android.support.v4.widget.DrawerLayout>
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use this
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.sun_soft.app_maker_new.MainActivity"
tools:ignore="MergeRootFrame" />
<ListView
android:id="@+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#ffffff"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="0dp" />
<ListView
android:id="@+id/right_drawer"
android:layout_width="@dimen/paanelsize"
android:layout_height="match_parent"
android:layout_gravity="end"
android:background="#ffffff"
android:choiceMode="singleChoice"
android:divider="@android:color/transparent"
android:dividerHeight="0dp" />
</android.support.v4.widget.DrawerLayout>
and then you will have to reference the list in mainactivity and have to make an adapter and inflate the view for the listitem.
I think that in your code you are wrong throwing some kind of view. please post the code.
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I would suggest you check the resources listed in your layout .
In my case, I made the mistake of saving the psd file as a png file. When this "bad" png file is referenced in my layout, Eclipse ends up with this error, i.e.
Exception raised during rendering: com.android.layoutlib.bridge.MockView cannot be cast to android.widget.ImageView
Simply because the png file referenced in the ImageView was essentially a psd file, i.e .:
android:src="@drawable/my_psd_file_with_wrong_png_extension"
Hope it helps.
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