【译】加载进阶

int resourceId = R.mipmap.ic_launcher;

Picasso
    .with(context)
    .load(resourceId)
    .into(imageViewResource);

// this file probably does not exist on your device. However, you can use any file path, which points to an image file

File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Running.jpg");

Picasso
    .with(context)
    .load(file)
    .into(imageViewFile);

// this could be any Uri. for demonstration purposes we're just creating an Uri pointing to a launcher icon

Uri uri = resourceIdToUri(context, R.mipmap.future_studio_launcher);

Picasso
    .with(context)
    .load(uri)
    .into(imageViewUri);

public static final String ANDROID_RESOURCE = "android.resource://";
public static final String FOREWARD_SLASH = "/";

private static Uri resourceIdToUri(Context context, int resourceId) {
    return Uri.parse(ANDROID_RESOURCE + context.getPackageName() + FOREWARD_SLASH + resourceId);
}