Come modificare il colore delle schede di navigazione di ActionBar?

Question

Ho un ActionBar in un'app e ha schede di navigazione incorporate in esso (non TabHost!). Per impostazione predefinita, le schede vengono visualizzate in grigio scuro, con una sottile linea blu sotto tutte le schede e un indicatore blu nella scheda selezionata.

Quali stili devo sostituire per cambiare quei colori?

Answer 1

Non ho cambiato le schede stesse, ma presumo che si può fare con questi stili di styles.xml ...

<style name="Widget.Holo.TabWidget" parent="Widget.TabWidget"> 
     <item name="android:tabStripLeft">@null</item> 
     <item name="android:tabStripRight">@null</item> 
     <item name="android:tabStripEnabled">false</item> 
     <item name="android:divider">?android:attr/dividerVertical</item> 
     <item name="android:showDividers">middle</item> 
     <item name="android:dividerPadding">8dip</item> 
     <item name="android:measureWithLargestChild">true</item> 
     <item name="android:tabLayout">@android:layout/tab_indicator_holo</item> 
    </style> 

con tab_indicator_holo.xml

<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_holo" /> 
     <item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/tab_selected_holo" /> 

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

     <!-- Pressed --> 
     <!-- Non focused states --> 
     <item android:state_focused="false" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/tab_unselected_pressed_holo" /> 
     <item android:state_focused="false" android:state_selected="true" android:state_pressed="true" android:drawable="@drawable/tab_selected_pressed_holo" /> 

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

Oppure si può anche provare

<style name="Widget.Holo.ActionBar.TabView" parent="Widget.ActionBar.TabView"> 
      <item name="android:background">@drawable/tab_indicator_ab_holo</item> 
      <item name="android:paddingLeft">16dip</item> 
      <item name="android:paddingRight">16dip</item> 
     </style> 

e tab_indicator_ab_holo.xml

<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="@color/transparent" /> 
     <item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/tab_selected_holo" /> 

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

     <!-- Pressed --> 
     <!-- Non focused states --> 
     <item android:state_focused="false" android:state_selected="false" android:state_pressed="true" android:drawable="@drawable/list_pressed_holo_dark" /> 
     <item android:state_focused="false" android:state_selected="true" android:state_pressed="true" android:drawable="@drawable/tab_selected_pressed_holo" /> 

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

Infine utilizzando i due png-9 drawable: tab_selected_holo e tab_unselected_holo. Sembrano le due linee blu più spesse e sottili di cui stai parlando.

O intendi i minitab?

<style name="Widget.ActionBar.TabView" parent="Widget"> 
     <item name="android:gravity">center_horizontal</item> 
     <item name="android:background">@drawable/minitab_lt</item> 
     <item name="android:paddingLeft">4dip</item> 
     <item name="android:paddingRight">4dip</item> 
    </style> 

con in minitab_lt.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <item android:state_pressed="true" android:state_selected="true" 
      android:drawable="@drawable/minitab_lt_press" /> 
    <item android:state_selected="true" 
      android:drawable="@drawable/minitab_lt_selected" /> 
    <item android:state_pressed="true" 
      android:drawable="@drawable/minitab_lt_unselected_press" /> 
    <item android:drawable="@drawable/minitab_lt_unselected" /> 
</selector> 

Se avete bisogno di un'altra definizione basta cercare TabWidget qui: https://github.com/android/platform_frameworks_base/blob/master/core/res/res/values/styles.xml

Poi, come al solito definire il proprio stile con tutti gli attributi e drawable richieste ...

Answer 2

Se si desidera personalizzare facilmente le barre delle schede, è possibile utilizzare questo ottimo strumento: http://jgilfelt.github.io/android-actionbarstylegenerator

Basta selezionare i colori desiderati e genera automaticamente i XMLs stile, il PNG, ecc