fresco本地緩存

public class App extends Application {
@Override
public void onCreate() {
super.onCreate();

File sd = Environment.getExternalStorageDirectory();
    String mPath = sd.getPath() + "/image";
    File file = new File(mPath);
    if (!file.exists()) {
        file.mkdir();
    }
    Fresco.initialize(this,ImagePipelineConfig.newBuilder(App.this)
            .setMainDiskCacheConfig(
                    DiskCacheConfig.newBuilder(this)
                            .setBaseDirectoryPath(file)
                            .build()
            )
            .build()
    );
}

}