android开发之方形圆角listview代码分享

先看效果图：

首先，你得写一个类我们命名为cornerlistview

[java]

/**
 * 圆角listview示例
 * @description: 圆角listview示例
 * @filename: cornerlistview.java
 */
public class cornerlistview extends listview {
    public cornerlistview(context context) {
        super(context);
    }

    public cornerlistview(context context, attributeset attrs, int defstyle) {
        super(context, attrs, defstyle);
    }

    public cornerlistview(context context, attributeset attrs) {
        super(context, attrs);
    }

    @override
    public boolean onintercepttouchevent(motionevent ev) {
        switch (ev.getaction()) {
        case motionevent.action_down:
                int x = (int) ev.getx();
                int y = (int) ev.gety();
                int itemnum = pointtoposition(x, y);

                if (itemnum == adapterview.invalid_position)
                        break;                 
                else{
                    if(itemnum==0){
                        if(itemnum==(getadapter().getcount()-1)){                                    
                            setselector(r.drawable.<span style="color: #ff0000">app_list_corner_round</span>);
                        }else{
                            setselector(r.drawable.<span style="color: #ff0000">app_list_corner_round_top</span>);
                        }
                    }else if(itemnum==(getadapter().getcount()-1))
                            setselector(r.drawable.<span style="color: #ff0000">app_list_corner_round_bottom</span>);
                    else{                            
                        setselector(r.drawable.<span style="color: #ff0000">app_list_corner_shape</span>);
                    }
                }

                break;
        case motionevent.action_up:
                break;
        }

        return super.onintercepttouchevent(ev);
    }
}

/**
 * 圆角listview示例
 * @description: 圆角listview示例
 * @filename: cornerlistview.java
 */
public class cornerlistview extends listview {
    public cornerlistview(context context) {
        super(context);
    }

    public cornerlistview(context context, attributeset attrs, int defstyle) {
        super(context, attrs, defstyle);
    }

    public cornerlistview(context context, attributeset attrs) {
        super(context, attrs);
    }

    @override
    public boolean onintercepttouchevent(motionevent ev) {
        switch (ev.getaction()) {
        case motionevent.action_down:
                int x = (int) ev.getx();
                int y = (int) ev.gety();
                int itemnum = pointtoposition(x, y);

                if (itemnum == adapterview.invalid_position)
                        break;               
                else{
                 if(itemnum==0){
                        if(itemnum==(getadapter().getcount()-1)){                                  
                            setselector(r.drawable.app_list_corner_round);
                        }else{
                            setselector(r.drawable.app_list_corner_round_top);
                        }
                 }else if(itemnum==(getadapter().getcount()-1))
                         setselector(r.drawable.app_list_corner_round_bottom);
                 else{                          
                     setselector(r.drawable.app_list_corner_shape);
                 }
                }

                break;
        case motionevent.action_up:
                break;
        }

        return super.onintercepttouchevent(ev);
    }
}

其中，app_list_corner_round

[html]

<span style="color: #333333"><?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff" 
        android:endcolor="#40b9ff" 
        android:angle="270"/>
    <corners android:topleftradius="6dip"
        android:toprightradius="6dip"
        android:bottomleftradius="6dip"
        android:bottomrightradius="6dip"/>
</shape> </span>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff"
        android:endcolor="#40b9ff"
        android:angle="270"/>
    <corners android:topleftradius="6dip"
        android:toprightradius="6dip"
        android:bottomleftradius="6dip"
        android:bottomrightradius="6dip"/>
</shape>

app_list_corner_round_top

[html]

<span style="color: #333333"><?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff" 
        android:endcolor="#40b9ff" 
        android:angle="270"/>
    <corners android:topleftradius="6dip"
        android:toprightradius="6dip"/>
</shape> </span>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff"
        android:endcolor="#40b9ff"
        android:angle="270"/>
    <corners android:topleftradius="6dip"
        android:toprightradius="6dip"/>
</shape>

app_list_corner_round_bottom

[html]

<span style="color: #333333"><?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff" 
        android:endcolor="#40b9ff" 
        android:angle="270"/>
    <corners android:bottomleftradius="6dip"
        android:bottomrightradius="6dip" />
</shape> </span>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff"
        android:endcolor="#40b9ff"
        android:angle="270"/>
    <corners android:bottomleftradius="6dip"
        android:bottomrightradius="6dip" />
</shape>

app_list_corner_shape
[html]

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff" 
        android:endcolor="#40b9ff" 
        android:angle="270"/>
</shape> 

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient android:startcolor="#bfeeff"
        android:endcolor="#40b9ff"
        android:angle="270"/>
</shape>

写好了之后，就可以在你的代码中直接像listview一样调用。