Glide4判断图片是否有缓存(同步获取)

搜索一下网络上都是异步获取,唯一一个同步的还是反射,分享一个同步方法.

public static @Nullable File getCacheByUrl(Context context, String url) {
        final File[] cacheFile = new File[1];
        CountDownLatch countDownLatch = new CountDownLatch(1);
        new Thread(() -> {
            try {
                cacheFile[0] = GlideApp.with(context).downloadOnly().load(url).onlyRetrieveFromCache(true).submit().get();
            } catch (ExecutionException | InterruptedException e) {
                e.printStackTrace();
            }
            countDownLatch.countDown();
        }).start();
        try {
            countDownLatch.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return cacheFile[0];
    }