[英]Is it possible to change actionbar tab indicator programmatically
如何以編程方式更改操作欄的選定選項卡指示器? 我已經閱讀了選項卡樣式和Tab.setCustomView()方法,但這些都沒有幫助:
使用選項卡樣式,我可以更改指示器顏色,但它將保留所有選項卡(我希望每個選項卡都有一個指示器)。
使用選項卡自定義視圖,我使用了帶有TextView
for tab標題的布局,以及用於管理指示器顏色的View
。 在java中我動態地更改了View
的背景,但問題是View
的背景與標簽邊界不匹配。
<TextView
android:id="@+id/custom_tab_text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:layout_centerHorizontal="true"
android:gravity="center|center_horizontal"
android:textStyle="bold"/>
<View
android:id="@+id/custom_tab_view"
android:layout_width="match_parent"
android:layout_height="10dp"
android:layout_alignParentBottom="true"/>
誰能告訴我哪里錯了? 還有另一種方法嗎? 謝謝
通過使用@ Padma的答案生成我的標簽指示器背景,我已經成功實現了我想要的東西:我需要5個選擇器:綠色,黃色,藍色,橙色和紅色。 所以我創建了5個xml drawables
( tabs_selector_red.xml, tabs_selector_blue.xml, etc...
):
tabs_selector_green.xml:
<!-- Non focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="false" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="false" android:state_pressed="false" android:state_selected="true"/>
<!-- Focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="true" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="true" android:state_pressed="false" android:state_selected="true"/>
<!-- Pressed -->
<!-- Non focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="false" android:state_pressed="true" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="false" android:state_pressed="true" android:state_selected="true"/>
<!-- Focused states -->
<item android:drawable="@android:color/transparent" android:state_focused="true" android:state_pressed="true" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs_green" android:state_focused="true" android:state_pressed="true" android:state_selected="true"/>
我還為每個xml背景創建了一個layer-list
:layer_bg_selected_tabs_green.xml
<item>
<shape android:shape="rectangle" >
<solid android:color="@color/tab_green" />
<padding android:bottom="5dp" />
</shape>
</item>
<item>
<shape android:shape="rectangle" >
<solid android:color="#FFFFFF" />
</shape>
</item>
最后,在Java
,我使用所選標簽的custom view
和index
動態切換背景:
private static final int[] TABS_BACKGROUND = {
R.drawable.tabs_selector_orange, R.drawable.tabs_selector_green,
R.drawable.tabs_selector_red, R.drawable.tabs_selector_blue,
R.drawable.tabs_selector_yellow };
/*
BLA BLA BLA
*/
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
RelativeLayout tabLayout = (RelativeLayout) tab.getCustomView();
tabLayout.setBackgroundResource(TABS_BACKGROUND[tab.getPosition()]);
tab.setCustomView(tabLayout);
/* ... */
}
現在讓我們添加一些截圖:
//你的標簽欄應該是
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/Wrap"
android:background="@drawable/tabs_selector"
android:gravity="center_horizontal|bottom"
android:minHeight="@dimen/size_fourty"
>
<TextView
android:id="@+id/custom_tab_text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:layout_centerHorizontal="true"
android:gravity="center|center_horizontal"
android:textStyle="bold"/>
</RelativeLayout>
//你的tabs_selector.xml應該是這樣的
<!-- Non focused states -->
<item android:drawable="@drawable/layer_bg_unselected_tabs" android:state_focused="false" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs" android:state_focused="false" android:state_pressed="false" android:state_selected="true"/>
<!-- Focused states -->
<item android:drawable="@drawable/layer_bg_unselected_tabs" android:state_focused="true" android:state_pressed="false" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs" android:state_focused="true" android:state_pressed="false" android:state_selected="true"/>
<!-- Pressed -->
<!-- Non focused states -->
<item android:drawable="@drawable/layer_bg_unselected_tabs" android:state_focused="false" android:state_pressed="true" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs" android:state_focused="false" android:state_pressed="true" android:state_selected="true"/>
<!-- Focused states -->
<item android:drawable="@drawable/layer_bg_unselected_tabs" android:state_focused="true" android:state_pressed="true" android:state_selected="false"/>
<item android:drawable="@drawable/layer_bg_selected_tabs" android:state_focused="true" android:state_pressed="true" android:state_selected="true"/>
//你的layer_bg_unselected_tabs應該是這樣的
<item>
<shape android:shape="rectangle" >
<solid android:color="@color/red" />
<padding android:bottom="2dp" />
</shape>
</item>
<item>
<shape android:shape="rectangle" >
<solid android:color="@color/gray" />
</shape>
</item>
//你的layer_bg_selected_tabs應該是這樣的
<item>
<shape android:shape="rectangle" >
<solid android:color="@color/red" />
<padding android:bottom="8dp" />
</shape>
</item>
<item>
<shape android:shape="rectangle" >
<solid android:color="@color/gray" />
</shape>
</item>
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