How to create ring shape drawable in android?

问题

with this code I get just a border:

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="ring"
    android:innerRadius="15dp"
    android:thickness="2dp"
    android:useLevel="false">
    <solid android:color="#4d4d4d" />

</shape> 

how can I make a ring shape like below image :

回答1:

2dp outer ring with a 2dp gap:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:top="4dp"
        android:right="4dp"
        android:bottom="4dp"
        android:left="4dp">
        <shape
            android:shape="oval">
            <solid android:color="#4d4d4d" />
        </shape>
    </item>
    <item>
        <shape
            android:shape="oval">
            <stroke android:width="2dp"
                android:color="#4d4d4d"/>
        </shape>
    </item>
</layer-list>

回答2:

You will need to create a drawable and set it as a background.

shape_primary_ring.xml

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:innerRadiusRatio="2.5"
    android:shape="ring"
    android:thickness="4dp"
    android:useLevel="false">

    <solid android:color="@color/colorPrimary"/>

</shape>

Preview

回答3:

Ring drawable is juxtaposition of elements, use layer-list

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:right="6dip" android:left="6dip">
    <shape xmlns:android="http://schemas.android.com/apk/res/android"
           android:innerRadius="0dp"
           android:shape="ring"
           android:thicknessRatio="3"
           android:useLevel="false" >
      <solid android:color="@android:color/transparent" />
      <stroke
          android:width="5dp"
          android:color="@color/maroon" />
    </shape>
  </item>
  <item android:right="20dip"
        android:left="20dip"
        android:bottom="0dip"
        android:top="34dip">
    <shape xmlns:android="http://schemas.android.com/apk/res/android"
           android:shape="rectangle"
           android:innerRadius="0dp">
      <solid android:color="@color/maroon" />
      <stroke android:width="1dip" android:color="@android:color/transparent" />
    </shape>
  </item>
  <item android:right="20dip"
        android:left="20dip"
        android:bottom="34dip"
        android:top="0dip">
    <shape xmlns:android="http://schemas.android.com/apk/res/android"
           android:shape="rectangle"
           android:innerRadius="0dp">
      <solid android:color="@color/maroon" />
      <stroke android:width="1dip" android:color="@android:color/transparent" />
    </shape>
  </item>
</layer-list>

Xml drawable by all means more useful than static images, they can be correctly scaled without need of .9 library or generating set of different sizes from Gimp, Photoshop

回答4:

I think using a shape in android is better than a shape in photoshop.

Correct, creating a drawable it's better because you can change the colour or shape with code instead of creating a new image resource, for example. Create a FrameLayout with 2 Views and a TextView. The first view background would be your outer ring (shape) and the second a filed circle (shape). Finally the last View (bigger z-index) your TextView:

<FrameLayout>
   <View/><!-- (outer ring)-->
   <View/><!-- (filed circle)-->
   <TextView/><!-- (text)-->
</FrameLayout>

回答5:

<item>
    <shape
        android:innerRadiusRatio="4"
        android:shape="ring"
        android:thicknessRatio="15"
        android:useLevel="false" >
        <solid android:color="@color/white_color" />
        <size
            android:height="48dip"
            android:width="48dip" />
    </shape>

</item>
<item>
    <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="ring"
        android:innerRadius="0dp"
        android:thickness="55dp"
        android:useLevel="false">
        <solid android:color="@color/white_color"/>
        <size android:height="200dp"
            android:width="200dp"/>
        <stroke android:color="@color/green_color" android:width="5dp"/>
    </shape>
</item>

回答6:

<?xml version="1.0" encoding="utf-8"
    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item>
            <shape android:innerRadius="10dp" android:shape="ring" android:thickness="2dp" android:useLevel="false">
                <solid android:color="#dfdfdf" />
            </shape>
        </item>
     </selector>

来源：https://stackoverflow.com/questions/30676208/how-to-create-ring-shape-drawable-in-android