的ListView与选择不升级Froyo

Question

工作，我有这样的：

row_selector.xml：

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"  android:exitFadeDuration="@android:integer/config_mediumAnimTime"> 

<item android:drawable="@color/green" android:state_pressed="true"/> 
<item android:drawable="@color/blue" android:state_selected="true"/> 
<item android:drawable="@color/yellow" android:state_activated="true"/> 

</selector> 

album_item.xml：

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

AlbumCursorAdapter.java

public class AlbumCursorAdapter extends CursorAdapter { 
... 
@Override 
public View newView(Context context, Cursor cursor, ViewGroup parent) { 
    final View view = mInflater.inflate(R.layout.album_item, parent, false); 
... 
} 

为什么在android上工作4.0，并没有在Froyo工作？

谢谢！

Answer 1

android：state_activated在android 3.0（API 11）中引入JavaDoc