如何通过 OkHttpClient 拦截器将 baseUrl(主机)添加到 Picasso?
How to add baseUrl (host) to Picasso via OkHttpClient Interceptor?
我有对象 Photo
和 String imageUrl = "foo.png"
并且有String host = "http://example.com/photos/"
我正在尝试加载图像:
mPicasso.load(photo.getImageUrl()).into(mImageView);
public Picasso providesPicasso(OkHttp3Downloader okHttpDownloader) {
return new Picasso.Builder(context).listener(new Picasso.Listener() {
@Override
public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
exception.printStackTrace();
}
}).downloader(okHttpDownloader)
.executor(Executors.newSingleThreadExecutor())//avoid OutOfMemoryError
.build();
}
public OkHttp3Downloader providesPicassoOkHttpClient(Context context) {
File cacheDir = createDefaultCacheDir(context, BIG_CACHE_PATH);
long cacheSize = calculateDiskCacheSize(cacheDir);
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.cache(new Cache(cacheDir, cacheSize))
.addInterceptor(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
String host = "http://example.com/photos/";
HttpUrl newUrl = request.url().newBuilder().host(host + request.url()).build();
request = request.newBuilder().url(newUrl).build();
return chain.proceed(request);
}
})
.build();
return new OkHttp3Downloader(okHttpClient);
}
`
错误:
java.lang.IllegalStateException: Unrecognized type of request: Request{foo.png}
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.load(BitmapHunter.java:66)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.hunt(BitmapHunter.java:206)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.run(BitmapHunter.java:159)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.lang.Thread.run(Thread.java:818)
也许你可以尝试将每张照片的照片 url 与照片 url 连接起来。
public static final String BASE_IMAGE_URL = "//your image host"
...
Picasso.with(getContext()).load(BASE_IMAGE_URL + "image url").into(your imageview);
首先,您可以通过拦截器将 headers 添加到您的请求中。
private Interceptor getDefaultHeaderInterceptor() throws IOException {
return new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request.Builder requestBuilder = chain.request().newBuilder();
requestBuilder.header(ApiConstants.ACCEPT_LANGUAGE, Locale.getDefault().getLanguage());
requestBuilder.header(ApiConstants.AUTHORIZATION, oauthTokenStore.getAccessToken());
return chain.proceed(requestBuilder.build());
}
};
}
你可以像这样创建 OkHttpClient。
public OkHttpClient getOkHttpClient() throws IOException {
OkhttpClient.Builder builder = new Builder()
.readTimeout(BuildConfig.CONNECTION_READ_TIMEOUT, TimeUnit.SECONDS)
.connectTimeout(BuildConfig.CONNECT_TIMEOUT, TimeUnit.SECONDS)
.addInterceptor(getDefaultHeaderInterceptor())
.build();
...
最后构造 Picasso 实例:
public Picasso providePicasso() {
return new Picasso.Builder(context)
.downloader(new OkHttp3Downloader(getOkHttpClient()))
.build();
}
然后你可以像@faranjit 告诉你的那样使用它:
providePicasso().load(BASE_IMAGE_URL + "image url").into(your imageview);
这里的问题是 Picasso
拒绝了您的请求,因为它无法识别 Request
的类型。所以没有拦截请求。
W/System.err: java.lang.IllegalStateException: Unrecognized type of request: Request{img_fjords.jpg}
你不应该在你的 Interceptor
中转换你的 URL 并且应该事先这样做。你可以加一个Picasso.RequestTransformer
to your Picasso.Builder
。根据文档,RequestTransformer
是:
A transformer that is called immediately before every request is submitted. This can be used to modify any information about a request.
For example, if you use a CDN you can change the hostname for the image based on the current location of the user in order to get faster download speeds.
public Picasso providesPicasso(OkHttp3Downloader okHttpDownloader) {
return new Picasso.Builder(context).listener(new Picasso.Listener() {
@Override
public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
exception.printStackTrace();
}
})
.downloader(okHttpDownloader)
.requestTransformer(new Picasso.RequestTransformer() {
@Override
public com.squareup.picasso.Request transformRequest(com.squareup.picasso.Request request) {
Log.d(TAG, "nonTransformedRequest: " + request.uri.toString());
String host = "https://www.w3schools.com/w3css/";
com.squareup.picasso.Request build = new com.squareup.picasso.Request.Builder(Uri.parse(host + request.uri.toString())).build();
Log.d(TAG, "transformedRequest: " + build.uri.toString());
return build;
}
})
.executor(Executors.newSingleThreadExecutor())//avoid OutOfMemoryError
.build();
}
您可以在 Interceptor
中处理剩下的事情
public OkHttp3Downloader providesPicassoOkHttpClient(Context context) {
File cacheDir = createDefaultCacheDir(context, BIG_CACHE_PATH);
long cacheSize = calculateDiskCacheSize(cacheDir);
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.cache(new Cache(cacheDir, cacheSize))
.addInterceptor(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
Log.d(TAG, "URL in Interceptor: "+request.url());
request = request.newBuilder().build(); //ADD HEADERS HERE
return chain.proceed(request);
}
})
.build();
return new OkHttp3Downloader(okHttpClient);
}
现在只需按预期使用 mPicasso
mPicasso.load(photo.getImageUrl()).into(mImageView);
这是我们的 LOG
的样子
02-15 15:10:14.767 6531-6531/com.smk.stack D/TAG: nonTransformedRequest: img_fjords.jpg
02-15 15:10:14.767 6531-6531/com.smk.stack D/TAG: transformedRequest: https://www.w3schools.com/w3css/img_fjords.jpg
02-15 15:10:14.828 6531-6590/com.smk.stack D/TAG: URL in Interceptor: https://www.w3schools.com/w3css/img_fjords.jpg
保持简单!你有classPhoto
?添加方法
public String getFullUrl(Context context) {
return context.getString(R.string.host) + imageUrl;
}
将您的主机定义移动到字符串资源中(奖励:您现在可以针对不同的配置覆盖它,例如用于暂存、生产等)。
如果您需要额外的 headers,请将它们添加到 Interceptor
中。对于 Picasso 使用新方法:
mPicasso.load(photo.getFullUrl(getContext())).into(mImageView);
我有对象 Photo
和 String imageUrl = "foo.png"
并且有String host = "http://example.com/photos/"
我正在尝试加载图像:
mPicasso.load(photo.getImageUrl()).into(mImageView);
public Picasso providesPicasso(OkHttp3Downloader okHttpDownloader) {
return new Picasso.Builder(context).listener(new Picasso.Listener() {
@Override
public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
exception.printStackTrace();
}
}).downloader(okHttpDownloader)
.executor(Executors.newSingleThreadExecutor())//avoid OutOfMemoryError
.build();
}
public OkHttp3Downloader providesPicassoOkHttpClient(Context context) {
File cacheDir = createDefaultCacheDir(context, BIG_CACHE_PATH);
long cacheSize = calculateDiskCacheSize(cacheDir);
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.cache(new Cache(cacheDir, cacheSize))
.addInterceptor(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
String host = "http://example.com/photos/";
HttpUrl newUrl = request.url().newBuilder().host(host + request.url()).build();
request = request.newBuilder().url(newUrl).build();
return chain.proceed(request);
}
})
.build();
return new OkHttp3Downloader(okHttpClient);
}
`
错误:
java.lang.IllegalStateException: Unrecognized type of request: Request{foo.png}
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.load(BitmapHunter.java:66)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.hunt(BitmapHunter.java:206)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.run(BitmapHunter.java:159)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.lang.Thread.run(Thread.java:818)
也许你可以尝试将每张照片的照片 url 与照片 url 连接起来。
public static final String BASE_IMAGE_URL = "//your image host"
...
Picasso.with(getContext()).load(BASE_IMAGE_URL + "image url").into(your imageview);
首先,您可以通过拦截器将 headers 添加到您的请求中。
private Interceptor getDefaultHeaderInterceptor() throws IOException {
return new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request.Builder requestBuilder = chain.request().newBuilder();
requestBuilder.header(ApiConstants.ACCEPT_LANGUAGE, Locale.getDefault().getLanguage());
requestBuilder.header(ApiConstants.AUTHORIZATION, oauthTokenStore.getAccessToken());
return chain.proceed(requestBuilder.build());
}
};
}
你可以像这样创建 OkHttpClient。
public OkHttpClient getOkHttpClient() throws IOException {
OkhttpClient.Builder builder = new Builder()
.readTimeout(BuildConfig.CONNECTION_READ_TIMEOUT, TimeUnit.SECONDS)
.connectTimeout(BuildConfig.CONNECT_TIMEOUT, TimeUnit.SECONDS)
.addInterceptor(getDefaultHeaderInterceptor())
.build();
... 最后构造 Picasso 实例:
public Picasso providePicasso() {
return new Picasso.Builder(context)
.downloader(new OkHttp3Downloader(getOkHttpClient()))
.build();
}
然后你可以像@faranjit 告诉你的那样使用它:
providePicasso().load(BASE_IMAGE_URL + "image url").into(your imageview);
这里的问题是 Picasso
拒绝了您的请求,因为它无法识别 Request
的类型。所以没有拦截请求。
W/System.err: java.lang.IllegalStateException: Unrecognized type of request: Request{img_fjords.jpg}
你不应该在你的 Interceptor
中转换你的 URL 并且应该事先这样做。你可以加一个Picasso.RequestTransformer
to your Picasso.Builder
。根据文档,RequestTransformer
是:
A transformer that is called immediately before every request is submitted. This can be used to modify any information about a request. For example, if you use a CDN you can change the hostname for the image based on the current location of the user in order to get faster download speeds.
public Picasso providesPicasso(OkHttp3Downloader okHttpDownloader) {
return new Picasso.Builder(context).listener(new Picasso.Listener() {
@Override
public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
exception.printStackTrace();
}
})
.downloader(okHttpDownloader)
.requestTransformer(new Picasso.RequestTransformer() {
@Override
public com.squareup.picasso.Request transformRequest(com.squareup.picasso.Request request) {
Log.d(TAG, "nonTransformedRequest: " + request.uri.toString());
String host = "https://www.w3schools.com/w3css/";
com.squareup.picasso.Request build = new com.squareup.picasso.Request.Builder(Uri.parse(host + request.uri.toString())).build();
Log.d(TAG, "transformedRequest: " + build.uri.toString());
return build;
}
})
.executor(Executors.newSingleThreadExecutor())//avoid OutOfMemoryError
.build();
}
您可以在 Interceptor
public OkHttp3Downloader providesPicassoOkHttpClient(Context context) {
File cacheDir = createDefaultCacheDir(context, BIG_CACHE_PATH);
long cacheSize = calculateDiskCacheSize(cacheDir);
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.cache(new Cache(cacheDir, cacheSize))
.addInterceptor(new Interceptor() {
@Override
public Response intercept(Chain chain) throws IOException {
Request request = chain.request();
Log.d(TAG, "URL in Interceptor: "+request.url());
request = request.newBuilder().build(); //ADD HEADERS HERE
return chain.proceed(request);
}
})
.build();
return new OkHttp3Downloader(okHttpClient);
}
现在只需按预期使用 mPicasso
mPicasso.load(photo.getImageUrl()).into(mImageView);
这是我们的 LOG
的样子
02-15 15:10:14.767 6531-6531/com.smk.stack D/TAG: nonTransformedRequest: img_fjords.jpg
02-15 15:10:14.767 6531-6531/com.smk.stack D/TAG: transformedRequest: https://www.w3schools.com/w3css/img_fjords.jpg
02-15 15:10:14.828 6531-6590/com.smk.stack D/TAG: URL in Interceptor: https://www.w3schools.com/w3css/img_fjords.jpg
保持简单!你有classPhoto
?添加方法
public String getFullUrl(Context context) {
return context.getString(R.string.host) + imageUrl;
}
将您的主机定义移动到字符串资源中(奖励:您现在可以针对不同的配置覆盖它,例如用于暂存、生产等)。
如果您需要额外的 headers,请将它们添加到 Interceptor
中。对于 Picasso 使用新方法:
mPicasso.load(photo.getFullUrl(getContext())).into(mImageView);