InflateException: Binary XML file line #22: Error inflating class <unknown>

Question

When i try to run my application it crashes and i get the following in logcat:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.application/com.example.application.StartActivity}: android.view.InflateException: Binary XML file line #22: Error inflating class <unknown>

.....

Caused by: android.view.InflateException: Binary XML file line #22: Error inflating class <unknown>

.....

Caused by: java.lang.reflect.InvocationTargetException

.....

Caused by: java.lang.UnsupportedOperationException: Can't convert to dimension: type=0x1

the error also includes to a line in my own code where i set the content view

this is the xml file i reference to

<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">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin">



            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="200dp">

                <TextView
                    android:id="@+id/summonerName"
                    android:layout_width="439dp"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:gravity="center_vertical"
                    android:hint="@string/prompt_email"
                    android:textSize="?android:textAppearanceLarge"
                    android:singleLine="true" />

                <Spinner
                    android:id="@+id/region"
                    android:layout_width="83dp"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:layout_toRightOf="@id/summonerName"
                    android:layout_alignParentRight="true"
                    />

            <Button
                android:id="@+id/btnSearch"
                style="?android:textAppearanceSmall"
                android:layout_width="200dp"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:background="#777"
                android:layout_alignParentBottom="true"
                android:layout_alignParentRight="true"
                android:text="@string/action_sign_in"
                android:textColor="#FFF"
                android:textStyle="bold" />

            </RelativeLayout>
        </LinearLayout>


<ListView
    android:id="@+id/left_drawer"
    android:layout_width="240dp"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:background="#f3f3f4"
    android:choiceMode="singleChoice"
    android:divider="#dadadc"
    android:dividerHeight="1dp"/>

I have no clue what to do with these errors. Can anyone help me onto the right track?

Answer 1

All your @dimens should be defined

for example

<resources>
    <!-- Default margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
</resources>

You might have added those in for example these folders

• values-sw600dp
• values-sw600dp-land
• values-v19
• values-xxhdpi

Or any other folder of course where they could belong
But don't forget that those also have to be in

• values

They have to be also defined there

if that isn't the problem try to create a value-XXXX folder for every layout-XXXX folder you have

• layout-xhdpi
• values-xhdpi

And

• layout-large
• values-large

for example