Android - Change Tab Background

TabWidget에서 추가되는 Tab의 Background변경하기
Tab마다 View를 얻어와서 직접 BackgroundDrawable을 지정하고
아래 막대부분은 reflection을 이용하여 꽁수로 바꿔치기 한다

tab_indicator.xml, tab_bar_left.xml, tab_bar_right.xml 내용은 <selector>로 정의

    private void changeTabWidgetStyle(TabWidget tw){
        for (int i = 0; i < tw.getChildCount(); i++) {
            View v = tw.getChildAt(i);
            v.setBackgroundDrawable(getResources().getDrawable(R.drawable.tab_indicator));
        }
       
        Field mBottomLeftStrip;
        Field mBottomRightStrip;
        try {
            mBottomLeftStrip = tw.getClass().getDeclaredField("mBottomLeftStrip");
            mBottomRightStrip = tw.getClass().getDeclaredField("mBottomRightStrip");
           
            if(!mBottomLeftStrip.isAccessible()) {
                mBottomLeftStrip.setAccessible(true);
            }
            if(!mBottomRightStrip.isAccessible()){
                mBottomRightStrip.setAccessible(true);
            }
            mBottomLeftStrip.set(tw, getResources().getDrawable(R.drawable.tab_bar_left));
            mBottomRightStrip.set(tw, getResources().getDrawable(R.drawable.tab_bar_right));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

tab_indicator.xml 예

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Non focused states -->
    <item android:state_focused="false"
        android:state_selected="false"
        android:state_pressed="false"
        android:drawable="@drawable/tab_unselected" />
    <item android:state_focused="false"
        android:state_selected="true"
        android:state_pressed="false"
        android:drawable="@drawable/tab_selected" />

    <!-- Focused states -->
    <item android:state_focused="true"
        android:state_selected="false"
        android:state_pressed="false"
        android:drawable="@drawable/tab_focus" />
    <item android:state_focused="true"
        android:state_selected="true"
        android:state_pressed="false"
        android:drawable="@drawable/tab_focus" />

    <!-- Pressed -->
    <item android:state_pressed="true" android:drawable="@drawable/tab_press" />
</selector>