title: Can’t use android:xlargeScreens="true"?
body: <p>I am making app for phones, but I wan’t them to be usable on tablets. I don’t know why can’t. I use this in my android manifest file:</p>
  
  <pre><code>android:xlargeScreens="true"
  </code></pre>
  
  <p>I get this error:</p>
  
  <p><em><strong>error: No resource identifier found for attribute 'xlargeScreens' in package 'android'</em></strong></p>
  
  <p>This is my manifest file:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="cro.perger.bonbon"
        android:versionCode="5"
        android:versionName="1.4"&gt;
      &lt;uses-sdk android:minSdkVersion="4" android:targetSdkVersion="11" /&gt;
  
      &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt;
          &lt;activity android:name=".bonbon"
                    android:label="@string/app_name"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
                  &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
  
              &lt;!-- Broadcast Receiver that will process AppWidget updates --&gt;
          &lt;receiver android:name=".HelloWidget" android:label="@string/w_name"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.appwidget.action.APPWIDGET_UPDATE" /&gt;
                  &lt;/intent-filter&gt;
          &lt;meta-data android:name="android.appwidget.provider"
              android:resource="@xml/hello_widget_provider" /&gt;
          &lt;/receiver&gt;
  
          &lt;receiver android:name=".SMSReceiver"&gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.provider.Telephony.SMS_RECEIVED" /&gt;
              &lt;/intent-filter&gt;
          &lt;/receiver&gt;    
  
          &lt;/application&gt;
          &lt;supports-screens android:resizeable="true"
                        android:smallScreens="true"
                        android:normalScreens="true"
                        android:largeScreens="true"
                        android:xlargeScreens="true"
                        android:anyDensity="true"/&gt;
      &lt;uses-permission android:name="android.permission.SEND_SMS"&gt;&lt;/uses-permission&gt;
      &lt;uses-permission android:name="android.permission.RECEIVE_SMS"&gt;&lt;/uses-permission&gt;
      &lt;uses-permission android:name="android.permission.CALL_PHONE"&gt;&lt;/uses-permission&gt;
      &lt;uses-permission android:name="android.permission.INTERNET"&gt;&lt;/uses-permission&gt; 
      &lt;uses-permission android:name="android.permission.READ_SMS"/&gt;
  &lt;/manifest&gt;
  </code></pre>
  
  <p>What should I do?</p>