Android ListView圆角

首先来看看ListView 相关基本属性

1、单击列表后,列表的背景变成黑色了。可通过指定android:cacheColorHint的属性来放变它,将它指定为透明。使用下面的属性值:
    android:cacheColorHint="#000000" 即可。
2、去除列表项中间的分割线:android:divider="#00000000",这里的值也可以指向一个drawable图片对象(android:divider="@drawable/list_line"),如果使用了图片高度大于系统的像素的话,可以自己设定一个高度。android:dividerHight="10px"
3、listview在拖动时,listview的背景变成黑色。用这个可解决:android:scrollingCache="false"
4、listview的上边和下边有黑色的阴影。用这个可解决:android:fadingEdge="none"
5、listview右边的滑动条覆盖列表项的内容。用这个可解决:android:scrollbarStyle="outsideInset"
6、修改listvew右边的滑动条与列表项之间的距离。用这个可解决:android:paddingRight="10dip",可以根据需要进行修改。
7、修改右边的滑动条显示的颜色。用这个可解决:
    android:scrollbarTrackVertical="@drawable/scrollbar_vertical_track"
    android:scrollbarThumbVertical="@drawable/scrollbar_vertical_thumb"  
其中scrollbar_vertical_track和scrollbar_vertical_thumb是滑动条的XML配置文件,在API中有,可根据自己的需要修改一下开始颜色和结束颜色即可。

具体请参考这篇文章 Android ListView 属性

下面来看看ListView 圆角实现,本文主要亮点是数据源可以灵活设置,不用在xml上写死了。

1.在drawable文件下新建

  list_bottom_selector.xml

 

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

    <item android:state_pressed="true"><shape>
            <solid android:color="#ADFF2F" />

            <corners android:bottomLeftRadius="4dp" android:bottomRightRadius="4dp" />
        </shape></item>
    <item><shape>
            <solid android:color="@color/white" />

            <corners android:bottomLeftRadius="4dp" android:bottomRightRadius="4dp" />
        </shape></item>

</selector>
如法炮制 新建几个xml

list_rect_selector.xml

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

    <item android:state_pressed="true"><shape>
            <solid android:color="#ADFF2F" />
        </shape></item>
    <item><shape>
            <solid android:color="@color/white" />
        </shape></item>

</selector>

list_round_selector.xml

<?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">  
      
        <item android:state_pressed="true"><shape>  
                <solid android:color="#ADFF2F" />  
                <corners android:bottomLeftRadius="4dp" android:bottomRightRadius="4dp" 
                    android:topLeftRadius="4dp" android:topRightRadius="4dp"/>  
            </shape></item>  
        <item><shape>  
                <solid android:color="@color/white" />  
      
                <corners android:bottomLeftRadius="4dp" android:bottomRightRadius="4dp" 
                    android:topLeftRadius="4dp" android:topRightRadius="4dp"/>  
            </shape></item>  
      
    </selector>  

list_top_selector.xml

<?xml version="1.0" encoding="utf-8"?>
    <selector xmlns:android="http://schemas.android.com/apk/res/android">  
      
        <item android:state_pressed="true"><shape>  
                <solid android:color="#ADFF2F" />  
      
                <corners android:topLeftRadius="4dp" android:topRightRadius="4dp" />  
            </shape></item>  
        <item><shape>  
      
                <solid android:color="@color/white" />  
      
                <corners android:topLeftRadius="4dp" android:topRightRadius="4dp" />  
            </shape></item>  
      
    </selector>  

接下来我们在layout新建一个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:paddingRight="5dp"
    >
    <TextView 
        android:id="@+id/text"
        android:layout_width="fill_parent"
        android:layout_height="40dp"
       	android:textSize="16sp"
       	android:paddingLeft="15dp"
       	android:textColor="#000000"
        android:gravity="left|center_vertical"
        />
    
    <ImageView 
        android:src="@drawable/common_left"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_alignParentRight="true"
        />

</RelativeLayout>

后新建一个activity_main.xml 来作为我们程序的主页面,也就是我们要显示ListView,布局也很简单

如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:paddingTop="15dp" >

        <ListView
            android:id="@+id/list1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/round_bg"
            android:cacheColorHint="#00000000"
            android:divider="@color/list_divider"
            android:dividerHeight="0.1dp"
            android:listSelector="#00000000" >
        </ListView>

        <ListView
            android:id="@+id/list2"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="15dp"
            android:background="@drawable/round_bg"
            android:cacheColorHint="#00000000"
            android:divider="@color/list_divider"
            android:dividerHeight="0.1dp"
            android:listSelector="#00000000" >
        </ListView>

        <ListView
            android:id="@+id/list3"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="15dp"
            android:background="@drawable/round_bg"
            android:cacheColorHint="#00000000"
            android:divider="@color/list_divider"
            android:dividerHeight="1px"
            android:listSelector="@color/transparent" >
        </ListView>
    </LinearLayout>


然后新建一个MainActivity

public class MainActivity extends Activity {

	private ListView list1;
	private ListView list2;
	private ListView list3;
	
	String array1[] = {"设置"};
	String array2[] = {"朋友圈","我的空间"};
	String array3[] = {"我的钱包","我的收藏","我的相册","关联"};
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
	}
    private void initView()
    {
		list1 = (ListView) findViewById(R.id.list1);
		list2 = (ListView) findViewById(R.id.list2);
		list3 = (ListView) findViewById(R.id.list3);
		list1.setAdapter(new MyListAdapter(array1,this));
		list2.setAdapter(new MyListAdapter(array2,this));
		list3.setAdapter(new MyListAdapter(array3,this));
    }

}


后面我们自定义一个MyListAdapter 继承BaseAdapter

public class MyListAdapter extends BaseAdapter {

	private LayoutInflater inflater;
	private String[] array;
	private Context mContext;

	public MyListAdapter(String[] array,Context context) {
		inflater = LayoutInflater.from(context);
		this.array = array;
		this.mContext =context; 
	}

	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return array.length;
	}

	@Override
	public Object getItem(int position) {
		// TODO Auto-generated method stub
		return array[position];
	}

	@Override
	public long getItemId(int position) {
		// TODO Auto-generated method stub
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		convertView = inflater.inflate(R.layout.item, null);
		TextView tv = (TextView) convertView.findViewById(R.id.text);
		tv.setText(array[position]);
		if (array.length == 1) {
			setBackgroundDrawable(convertView,
					R.drawable.list_round_selector);
		} else if (array.length == 2) {
			if (position == 0) {
				setBackgroundDrawable(convertView,
						R.drawable.list_top_selector);
			} else if (position == array.length - 1) {
				setBackgroundDrawable(convertView,
						R.drawable.list_bottom_selector);
			}
		} else {
			if (position == 0) {
				setBackgroundDrawable(convertView,
						R.drawable.list_top_selector);
			} else if (position == array.length - 1) {
				setBackgroundDrawable(convertView,
						R.drawable.list_bottom_selector);
			} else {
				setBackgroundDrawable(convertView,
						R.drawable.list_rect_selector);
			}
		}
		return convertView;
	}

	private void setBackgroundDrawable(View view, int resID) {
		view.setBackgroundDrawable(mContext.getResources().getDrawable(resID));
	}
}



效果图:Android ListView圆角_第1张图片


   

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