在xml中設(shè)置如下屬性，就可以把圖片變?yōu)閳A角

fresco:roundedCornerRadius="5dp"

<com.facebook.drawee.view.SimpleDraweeView    
    fresco:roundedCornerRadius="5dp"    
    fresco:actualImageScaleType="focusCrop"    
    android:id="@+id/image_view"    
    android:layout_width="match_parent"    
    android:layout_height="match_parent"    />

Uri uri = Uri.parse("http://i.imgur.com/DvpvklR.png");
SimpleDraweeView imageView = (SimpleDraweeView) findViewById(R.id.image_view);
imageView.setImageURI(uri);```


![Paste_Image.png](http://upload-images.jianshu.io/upload_images/1503465-55edac1cbd3c3d4d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
 - 當(dāng)然也可以設(shè)置底部不為圓角

<com.facebook.drawee.view.SimpleDraweeView
fresco:roundBottomLeft="false"
fresco:roundBottomRight="false"
fresco:roundedCornerRadius="500dp"
fresco:actualImageScaleType="focusCrop"
android:id="@+id/image_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />

![Paste_Image.png](http://upload-images.jianshu.io/upload_images/1503465-2007ed218a47745e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

- 如果你是用來做頭像的，一般設(shè)置為圓圈圖片

<com.facebook.drawee.view.SimpleDraweeView
fresco:roundAsCircle="true"
fresco:actualImageScaleType="focusCrop"
android:id="@+id/image_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />

![Paste_Image.png](http://upload-images.jianshu.io/upload_images/1503465-f8423688fa5d28f6.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

- 還可以加個(gè)頭盔

<com.facebook.drawee.view.SimpleDraweeView
fresco:roundAsCircle="true"
fresco:actualImageScaleType="focusCrop"
android:id="@+id/image_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
fresco:roundingBorderWidth="10dp"
fresco:roundingBorderColor="#ff0000" />```

Paste_Image.png