1.添加读写权限 网络权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>
2.在Application 中 Fresco初始化
// 设置磁盘缓存
DiskCacheConfig diskCacheConfig = DiskCacheConfig.newBuilder(this)
.setBaseDirectoryName("images_zjj")
.setBaseDirectoryPath(Environment.getExternalStorageDirectory())
.build();
//设置磁盘缓存的配置,生成配置文件
ImagePipelineConfig config = ImagePipelineConfig.newBuilder(this)
.setMainDiskCacheConfig(diskCacheConfig)
.build();
Fresco.initialize(this,config);
OK.