Android : how can set style dynamically to component?

i have used getlayoutInflater method to style a button dynamically , but width,height and weight are not applied. how can solve this problem?

in MainActivity : 
 award = (Button) getLayoutInflater().inflate(R.layout.btn_layout, null);
                    award.setId(R.id.award);
                    award.setText("---");
                    submenu.addView(award);

in inflater Layout :
<Button
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_height="wrap_content"
        android:width="0dp"
        android:layout_weight="1"
        style="@style/subbtn"></Button>


in style.xml :
<style name="subbtn">
        <item name="android:textColor">#fff</item>
        <item name="android:background">@drawable/selector</item>
    </style>