Glide加载OkHttp框架https协议的图片

Glide是支持加载https协议图片的，需要自定义GlideModule的实现类，将OkHttp框架实现了https协议的OkHttpClient配置进去。我测试的Glide版本是3.7.0，Okhttp3的版本是3.4.1，核心的类只有三个供大家参考。

public class GlideModuleForOkHttps implements GlideModule {
    @Override
    public void applyOptions(Context context, GlideBuilder builder) {
        // Do nothing.
    }


    @Override
    public void registerComponents(Context context, Glide glide) {
        OkHttpClient client = HttpProcessorModel.getProcessor().mOkHttpClient;
        glide.register(GlideUrl.class, InputStream.class, new OkHttpUrlLoader.Factory(client));
    }
}

public class OkHttpStreamFetcher implements DataFetcher {
    private final OkHttpClient client;
    private final GlideUrl url;
    private InputStream stream;
    private ResponseBody responseBody;

    public OkHttpStreamFetcher(OkHttpClient client, GlideUrl url) {
        this.client = client;
        this.url = url;
    }

    @Override
    public InputStream loadData(Priority priority) throws Exception {
        Request.Builder requestBuilder = new Request.Builder()
                .url(url.toStringUrl());

        for (Map.Entry headerEntry : url.getHeaders().entrySet()) {
            String key = headerEntry.getKey();
            requestBuilder.addHeader(key, headerEntry.getValue());
        }

        Request request = requestBuilder.build();

        Response response = client.newCall(request).execute();
        responseBody = response.body();
        if (!response.isSuccessful()) {
            throw new IOException("Request failed with code: " + response.code());
        }

        long contentLength = responseBody.contentLength();
        stream = ContentLengthInputStream.obtain(responseBody.byteStream(), contentLength);
        return stream;
    }

    @Override
    public void cleanup() {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException e) {
            }
        }
        if (responseBody != null) {
            responseBody.close();
        }
    }

    @Override
    public String getId() {
        return url.getCacheKey();
    }

    @Override
    public void cancel() {
    }
}

public class OkHttpUrlLoader implements ModelLoader {

    public static class Factory implements ModelLoaderFactory {
        private static volatile OkHttpClient internalClient;
        private OkHttpClient client;

        private static OkHttpClient getInternalClient() {
            if (internalClient == null) {
                synchronized (Factory.class) {
                    if (internalClient == null) {
                        internalClient = new OkHttpClient();
                    }
                }
            }
            return internalClient;
        }

        public Factory() {
            this(getInternalClient());
        }

        public Factory(OkHttpClient client) {
            this.client = client;
        }

        @Override
        public ModelLoader build(Context context, GenericLoaderFactory factories) {
            return new OkHttpUrlLoader(client);
        }

        @Override
        public void teardown() {
        }
    }

    private final OkHttpClient client;

    public OkHttpUrlLoader(OkHttpClient client) {
        this.client = client;
    }

    @Override
    public DataFetcher getResourceFetcher(GlideUrl model, int width, int height) {
        return new OkHttpStreamFetcher(client, model);
    }
}

最后一步是在清单文件中注册：

    
        
        
            android:name="com.**.glide.GlideModuleForOkHttps"
            android:value="GlideModule"/>