ListView保存并还原焦点

原文：http://blog.csdn.net/cgq1030699125/article/details/54343693
盗个图

public class MemListView extends ListView {  
    public MemListView(Context context) {  
        super(context);  
    }  

    public MemListView(Context context, AttributeSet attrs) {  
        super(context, attrs);  
    }  

    public MemListView(Context context, AttributeSet attrs, int defStyle) {  
        super(context, attrs, defStyle);  
    }  

    @Override  
        protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {  
        int lastSelectItem = getSelectedItemPosition();  
        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);  
        if (gainFocus) {  
            if(lastSelectItem < 0){
               lastSelectItem = 0;  //默认选第一个
            }
            setSelection(lastSelectItem);  
        }  
    }  
}