Add method to set http timeouts in Glide’s default networking library.

Progress toward #2220.

library/src/main/java/com/bumptech/glide/request/RequestOptions.java

@@ -14,6 +14,7 @@
 import com.bumptech.glide.load.Options;
 import com.bumptech.glide.load.Transformation;
 import com.bumptech.glide.load.engine.DiskCacheStrategy;
+import com.bumptech.glide.load.model.stream.HttpGlideUrlLoader;
 import com.bumptech.glide.load.resource.bitmap.BitmapDrawableTransformation;
 import com.bumptech.glide.load.resource.bitmap.BitmapEncoder;
 import com.bumptech.glide.load.resource.bitmap.CenterCrop;
@@ -314,6 +315,13 @@ public static RequestOptions downsampleOf(@NonNull DownsampleStrategy strategy)
     return new RequestOptions().downsample(strategy);
   }
 
+  /**
+   * Returns a {@link RequestOptions} object with {@link #timeout(int)} set.
+   */
+  public static RequestOptions timeoutOf(int timeout) {
+    return new RequestOptions().timeout(timeout);
+  }
+
   /**
    * Returns a {@link com.bumptech.glide.request.RequestOptions} with {@link
    * #encodeQuality(int)} called with the given quality.
@@ -726,6 +734,20 @@ public RequestOptions encodeQuality(int quality) {
     return set(BitmapEncoder.COMPRESSION_QUALITY, quality);
   }
 
+  /**
+   * Sets the time position of the frame to extract from a video.
+   *
+   * <p>This is a component option specific to {@link VideoBitmapDecoder}. If the default video
+   * decoder is replaced or skipped because of your configuration, this option may be ignored.
+   *
+   * @see VideoBitmapDecoder#TARGET_FRAME
+   * @param frameTimeMicros The time position in microseconds of the desired frame. If negative, the
+   *                        Android framework implementation return a representative frame.
+   */
+  public RequestOptions frame(long frameTimeMicros) {
+    return set(VideoBitmapDecoder.TARGET_FRAME, frameTimeMicros);
+  }
+
   /**
    * Sets the {@link DecodeFormat} to use when decoding {@link Bitmap} objects using
    * {@link Downsampler}.
@@ -735,27 +757,40 @@ public RequestOptions encodeQuality(int quality) {
    * ({@link android.media.MediaMetadataRetriever} for example), or that the decoder may choose to
    * ignore the requested format if it can't display the image (i.e. RGB_565 is requested, but the
    * image has alpha).
+   *
+   * <p>This is a component option specific to {@link Downsampler}. If the defautlt Bitmap decoder
+   * is replaced or skipped because of your configuration, this option may be ignored.
+   *
+   * @see Downsampler#DECODE_FORMAT
    */
   public RequestOptions format(@NonNull DecodeFormat format) {
     return set(Downsampler.DECODE_FORMAT, Preconditions.checkNotNull(format));
   }
 
   /**
-   * Sets the time position of the frame to extract from a video.
+   * Sets the {@link DownsampleStrategy} to use when decoding {@link Bitmap Bitmaps} using
+   * {@link Downsampler}.
    *
-   * @param frameTimeMicros The time position in microseconds of the desired frame. If negative, the
-   *                        Android framework implementation return a representative frame.
+   * <p>This is a component option specific to {@link Downsampler}. If the defautlt Bitmap decoder
+   * is replaced or skipped because of your configuration, this option may be ignored.
    */
-  public RequestOptions frame(long frameTimeMicros) {
-    return set(VideoBitmapDecoder.TARGET_FRAME, frameTimeMicros);
+  public RequestOptions downsample(@NonNull DownsampleStrategy strategy) {
+    return set(Downsampler.DOWNSAMPLE_STRATEGY, Preconditions.checkNotNull(strategy));
   }
 
   /**
-   * Sets the {@link DownsampleStrategy} to use when decoding {@link Bitmap Bitmaps} using
-   * {@link Downsampler}.
+   * Sets the read and write timeout for the http requests used to load the image.
+   *
+   * <p>This is a component option specific to Glide's default networking library and
+   * {@link com.bumptech.glide.load.model.stream.HttpGlideUrlLoader}. If you use any other
+   * networking library including Glide's Volley or OkHttp integration libraries, this option will
+   * be ignored.
+   *
+   * @see com.bumptech.glide.load.model.stream.HttpGlideUrlLoader#TIMEOUT
+   * @param timeoutMs The read and write timeout in milliseconds.
    */
-  public RequestOptions downsample(@NonNull DownsampleStrategy strategy) {
-    return set(Downsampler.DOWNSAMPLE_STRATEGY, Preconditions.checkNotNull(strategy));
+  public RequestOptions timeout(int timeoutMs) {
+    return set(HttpGlideUrlLoader.TIMEOUT, timeoutMs);
   }
 
   /**