Glide3.8升级到Glide4.0.0

1.最近公司项目内存占用较高，加上GIF图片掉祯，发现gilded官网升级到最新的4.0.0(正式版)
解决了这个问题 话不多说直接上代码。
2.解决加载本地APP图标错误
a.编写拦截器

 Glide.get(this).getRegistry().replace(GlideUrl.class, InputStream.class, new OkHttpUrlLoader.Factory())//okhttp拦截器
                .append(AppIcon.class, ApplicationInfo.class, new ApplicationIconModelLoader.Factory())
                .append(ApplicationInfo.class, Drawable.class, new ApplicationIconDecoder())// 本地应用图片加载拦截器
                .append(String.class, InputStream.class, new WebpUrlLoader.Factory())
                .replace(GlideUrl.class, InputStream.class, new OkHttpUrlLoader.Factory());//webp图标加载拦截器

引用:

   compile 'com.github.bumptech.glide:glide:4.0.0'
   compile 'com.github.bumptech.glide:okhttp3-integration:4.0.0@aar'

b.构建ApplicationIconModelLoader

public class ApplicationIconModelLoader implements ModelLoader<AppIcon, ApplicationInfo> {

    public static class Factory implements ModelLoaderFactory<AppIcon, ApplicationInfo> {
        @Override
        public ModelLoader<AppIcon, ApplicationInfo> build(MultiModelLoaderFactory multiFactory) {
            return new ApplicationIconModelLoader();
        }

        @Override
        public void teardown() {
        }
    }

    @Nullable
    @Override
    public LoadData<ApplicationInfo> buildLoadData(final AppIcon appIcon, int width, int height, Options options) {
        return new LoadData<>(new ObjectKey(appIcon), new DataFetcher<ApplicationInfo>() {
            @Override
            public void loadData(Priority priority, DataCallback<? super ApplicationInfo> callback) {
                PackageManager packageManager = AegonApplication.getContext().getPackageManager();
                PackageInfo packageInfo = null;
                ApplicationInfo applicationInfo = null;
                try {
                    packageInfo = packageManager.getPackageInfo(appIcon.getPackName(),
                            PackageManager.GET_SIGNATURES);
                } catch (PackageManager.NameNotFoundException e) {
                    e.printStackTrace();
                }
                if (packageInfo != null)
                    applicationInfo = packageInfo.applicationInfo;
                callback.onDataReady(applicationInfo);
            }

            @Override
            public void cleanup() {

            }

            @Override
            public void cancel() {

            }

            @Override
            public Class<ApplicationInfo> getDataClass() {
                return ApplicationInfo.class;
            }

            @Override
            public DataSource getDataSource() {
                return DataSource.LOCAL;
            }
        });
    }

    @Override
    public boolean handles(AppIcon appIcon) {
        return true;
    }
}

c：重点编写转换的包名的类

public class ApplicationIconDecoder implements ResourceDecoder<ApplicationInfo, Drawable> {
    @Nullable
    @Override
    public Resource<Drawable> decode(ApplicationInfo source, int width, int height, Options options)
            throws IOException {
        Drawable icon = source.loadIcon(AegonApplication.getContext().getPackageManager());
        return new DrawableResource<Drawable>(icon) {
            @Override
            public Class<Drawable> getResourceClass() {
                return Drawable.class;
            }

            @Override
            public int getSize() { // best effort
                if (drawable instanceof BitmapDrawable) {
                    return Util.getBitmapByteSize(((BitmapDrawable) drawable).getBitmap());
                } else {
                    return 1;
                }
            }

            @Override
            public void recycle() { /* not from our pool */ }
        };
    }

    @Override
    public boolean handles(ApplicationInfo source, Options options) throws IOException {
        return true;
    }

d.调用代码

  getRequestManager(context)
                .load(AppIcon.parseAppIcon(packName))
                .apply(imageDefaultOptions(R.drawable.default_app_icon))
                .into(imageView);

3.代码可能不全，最近我会传上我的github
4.新手小白 Markdown 编辑器 不是特别会用，分享用glide中遇到的坑.