Fresco 圖片緩存

public class App extends Application{
    @Override
    public void onCreate() {
        super.onCreate();
          Fresco.initialize(this, ImagePipelineConfig.newBuilder(App.this)
                          .setMainDiskCacheConfig(
                                  DiskCacheConfig.newBuilder(this)
                                          //磁盤緩存路徑
                                          .setBaseDirectoryPath(new File(Environment.getExternalStorageDirectory().getAbsolutePath())) // 注意Android運行時權限。
                                          .setMaxCacheSize(10 * 1024 * 1024)
                                          .build()
                          )
                          .build()
                  );
    }
}