Android ListView圆角 _ListView

临文乍了了，彻卷兀若无。这篇文章主要讲述Android ListView圆角相关的知识，希望能为你提供帮助。
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。
使用以下的属性值：
android:cacheColorHint="#000000" 就可以。
2、去除列表项中间的切割线：android:divider="#00000000"，这里的值也能够指向一个drawable图片对象(android:divider="@drawable/list_line")。假设使用了图片高度大于系统的像素的话，能够自己设定一个高度。
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、改动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"。能够依据须要进行改动。
7、改动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"
当中scrollbar_vertical_track和scrollbar_vertical_thumb是滑动条的XML配置文件，在API中有，可依据自己的须要改动一下開始颜色和结束颜色就可以。

详细请參考这篇文章 Android ListView 属性
以下来看看ListView 圆角实现，本文主要亮点是数据源能够灵活设置。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="https://www.songbingjia.com/android/@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，布局也非常easy
例如以下：

< ?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","我的相冊","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)); }}

后面我们自己定义一个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：