爲選定的旋轉器項目設置背景顏色

Question

我在我的代碼中使用了Spinner控件。我希望項目在選擇時突出顯示（即，該項目的背景顏色已更改）。這怎麼能實現？

Answer 1

創建一個XML：爲前：mybg.xml

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<item android:state_pressed="false" android:drawable="@color/anyColor" /> 
<item android:drawable="@android:color/transparent" /> 
</selector> 

，並在活動XML

做

<Spinner............... 
    android:drawSelectorOnTop="true" 
    android:background="@drawable/mybg"/> 

Answer 2

1. 創建自定義視圖佈局（例如，從TextView的）
2. 創建選擇器並將其設置爲該視圖的背景
3. 設置微調與自定義視圖

選擇：custom_selector.xml

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <item android:state_focused="true" 
      android:state_pressed="false" 
      android:drawable="@color/light_grey" /> 
    <item android:state_focused="true" 
      android:state_pressed="true" 
      android:drawable="@color/light_grey" /> 
    <item android:state_focused="false" 
      android:state_pressed="true" 
     android:drawable="@color/light_grey" /> 
    <item android:state_selected="true" android:drawable="@color/light_grey"/> 
    <item android:drawable="@color/white" /> 
</selector> 

自定義視圖佈局：my_simple_item

<?xml version="1.0" encoding="utf-8"?> 
<TextView 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:lines="1" 
android:padding="5dip" 
android:background="@drawable/custom_selector"/> 

初始化微調：

String[] items = new String[] {"One", "Two", "Three"}; 
Spinner spinner = (Spinner) findViewById(R.id.mySpinner); 
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.my_simple_item, items); 

希望這幫助