Use OkHttp to download lots of images to sd card
<p>So a part of my app downloads a large number (~1600) of images to SdCard using an IntentService. I previously used Glide, but now want to switch to OkHttp, since it seems to be faster and less battery consuming. This is my current code:</p>

<pre><code>for (int i = 1; i &lt; 1600; i++) {
        try {
            Request request = new Request.Builder()
                    .url(imageUrls[i])
                    .build();

            Response response = client.newCall(request).execute();
            File testDirectory = new File(Environment.getExternalStorageDirectory() 
                                                                  + "/downloadTest");
            if (!testDirectory.exists())
                 testDirectory.mkdirs();
            OutputStream outputStream = new FileOutputStream(new File(testDirectory, 
                                                          "testImage" + i + ".png"));
            InputStream inputStream = response.body().byteStream();
            byte[] buffer = new byte[1024];
            int read;
            while ((read = inputStream.read(buffer, 0, buffer.length)) &gt;= 0)
                outputStream.write(buffer, 0, read);
            outputStream.flush();
            outputStream.close();
            inputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
</code></pre>

<p>Is there any way I could optimize this code to make downloading faster? </p>