[Android/Java] Glide, An Image Loader. -- 1. Overview

Glide

you will save yourself a lot of time & headache.

• Why use glide?
• Android is not good when working with images, since it will load images into the memory pixel by pixel.
• Google introduce this library(Glide) in Google I/O 2015.
• Even Google official application uses Glide.

• example

• @Override
  public View getView(int position, View convertView, ViewGroup parent) {
      if (null == convertView) {
          convertView = inflater.inflate(R.layout.imageView, parent, false);
      }
       Glide
          .with(context)
          .load(images[position])
          .into((ImageView) convertView);
       return convertView;
  }

• Save yourself a lot of time & headache.
• Automatically resource re-use.
• Glide automatically takes care of the request canceling, clearing of the ImageViews.
• Glide load the correct image into the appropriate ImageView.
• So, You don’t need to make any code to image control for scrolling in “getView()”
• Cache policy
• Glide uses three sources: memory, disk and network. but, there is nothing coder will have to do.
• Glide hides all that complexity from coder, while creating intelligently sized caches for coder.
• Memory-wise
• In comparison to Picasso, Glide is much more efficient memory-wise.
• Glide automatically limits the size of the image it holds in cache and memory to the ImageView dimensions.
• Picasso also has the same ability, but requires a call to fit().
• Additional Function
• Placeholder
• Error-Placeholder
• Crossfade animation. (default 300ms)

• Glide  
      .with(context)
      .load("http://www.childc.co.kr/some_image.png")
      .placeholder(R.mipmap.ic_launcher) // can also be a drawable
      .error(R.mipmap.future_studio_launcher) // will be displayed if the image cannot be loaded
      .crossfade()
      .into(imageViewError);

• Displaying Gifs (Nothing is different from image)
• Displaying Thumbnail of video