title: android eclipse using string resource for text size in layouts
body: <p>I want to be able to store a font size (18sp) in a resource so that a lot of my layouts will use so that I can easily change the size in the future if I need to.  I've a string in a string resource file with "18sp" as the value, and I can call it in the layout editor by setting the text size to "@strings/string_name". At that point everything is fine, and the text is changed to the correct font.  The problem is once I try to test that on an actual device I get :</p>
  
  <pre><code>04-13 12:01:01.210: E/AndroidRuntime(17114): Caused by: android.view.InflateException:    Binary XML file line #50: Error inflating class &lt;unknown&gt;
  
  
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at 
  
  android.view.LayoutInflater.createView(LayoutInflater.java:606)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:742)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.app.Activity.setContentView(Activity.java:1835)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.app.Activity.performCreate(Activity.java:4465)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    ... 11 more
  04-13 12:01:01.210: E/AndroidRuntime(17114): Caused by: java.lang.reflect.InvocationTargetException
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at java.lang.reflect.Constructor.constructNative(Native Method)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.view.LayoutInflater.createView(LayoutInflater.java:586)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    ... 29 more
  04-13 12:01:01.210: E/AndroidRuntime(17114): Caused by: java.lang.UnsupportedOperationException: Can't convert to dimension: type=0x3
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:463)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.widget.TextView.&lt;init&gt;(TextView.java:786)
  04-13 12:01:01.210: E/AndroidRuntime(17114):    at android.widget.TextView.&lt;init&gt;(TextView.java:442)
  </code></pre>
  
  <p>Is this because I am using a string resource as a text size, or would it be some other underlying problem?  If it is because i am using a string resource, is there a different / more proper way to have a global text size that I can call on so that I can change everything by modifying 1 value?</p>
  
  <p>Also to note:  My app worked just fine before I tried using a string resource as a text size, so I'm relatively certain it can't be something unrelated that is causing the error.</p>
  
  <p>THanks!</p>