streching spinner icon
<p>when i am using my own background theme for spinner it is stretching icon.</p>

<p><img src="http://i.stack.imgur.com/ssaAe.png" alt="enter image description here"></p>

<p>my spinner code is :</p>

<pre><code>&lt;Spinner android:id="@+id/spinnerCategory" style="@style/spinner"
                    android:entries="@array/category_array" android:prompt="@string/category_prompt"
                    android:background="@drawable/spinner" /&gt;
</code></pre>

<p>my spinner.xml is:</p>

<pre><code>&lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;

    &lt;item android:state_window_focused="false" android:state_enabled="true"
        android:drawable="@drawable/btn_dropdown_normal" /&gt;

    &lt;item android:state_pressed="true" android:drawable="@drawable/btn_dropdown_pressed" /&gt;
    &lt;item android:state_focused="true" android:state_enabled="true"
        android:drawable="@drawable/btn_dropdown_selected" /&gt;
    &lt;item android:state_enabled="true" android:drawable="@drawable/btn_dropdown_normal" /&gt;

&lt;/selector&gt; 
</code></pre>

<p>and images i copied from the sdk 4.</p>

<p>so kindly help me out. how can i stop spinner icon stretching. </p>
