ImageView targetImageView = (ImageView) findViewById(R.id.imageView);
String internetUrl = "http://i.imgur.com/idojSYm.png";
Glide
  .with(context)
  .load(internetUrl)
  .into(targetImageView);

public interface MyDataModel {
  public String buildUrl(int width, int height);
} 
public class MyUrlLoader extends BaseGlideUrlLoader<MyDataModel> {
  @Override
  protected String getUrl(MyDataModel model, int width, int height) {
    // Construct the url for the correct size here.
    return model.buildUrl(width, height);
  }
}

Glide.with(this)
   .using(new MyUrlLoader(this))
   .load(new MyDataModel() {
     @Override
     public String buidUrl(int width, int height) {
       if (width >= 600) {
         return url1;
       } else {
         return url2;
        }
     }
   })
   .into(imageView);

public class MyGlideModule implements GlideModule {
  ...
  @Override
  public void registerComponents(Context context, Glide glide) {
    glide.register(MyDataModel.class, InputStream.class, 
      new MyUrlLoader.Factory());
  }
}

<meta-data
  android:name="com.mypackage.MyGlideModule"
  android:value="GlideModule" />

//定義正則表達式
private static final Pattern PATTERN =
   Pattern.compile("__w-((?:-?\\d+)+)__");

@Override
protected String getUrl(String model, int width, int height) {
  Matcher m = PATTERN.matcher(model);
  int bestBucket = 0;
  if (m.find()) {
    String[] found = m.group(1).split("-");//拿到可以加載的尺寸數(shù)組
    for (String bucketStr : found) {
      bestBucket = Integer.parseInt(bucketStr);
      if (bestBucket >= width) {//剛好大于要加載的尺寸，直接跳出循環(huán)
        // the best bucket is the first immediately
        // bigger than the requested width
        break;
      }
    }
    if (bestBucket > 0) {//返回合適尺寸的url
      model = m.replaceFirst("w"+bestBucket);
    }
  }
  return model;
}

adb shell setprop log.tag.GenericRequest DEBUG

adb shell setprop log.tag.GenericRequest ERROR

adb shell setprop log.tag.Engine VERBOSE
adb shell setprop log.tag.EngineJob VERBOSE
adb shell setprop log.tag.DecodeJob VERBOSE

// 示例: .listener(new LoggingListener<String, GlideDrawable>()) 
public class LoggingListener<T, R> implements RequestListener<T, R> {
  @Override public boolean onException(Exception e, Object model, Target target, boolean isFirstResource) {
    android.util.Log.d("GLIDE", String.format(Locale.ROOT,
        "onException(%s, %s, %s, %s)", e, model, target, isFirstResource), e);
    return false; 
  } 
  @Override public boolean onResourceReady(Object resource, Object model, Target target, boolean isFromMemoryCache, boolean isFirstResource) {
    android.util.Log.d("GLIDE", String.format(Locale.ROOT,
        "onResourceReady(%s, %s, %s, %s, %s)", resource, model, target, isFromMemoryCache, isFirstResource));
    return false; 
  } 
}