我有对象Photo with String imageUrl =“foo.png”
并有String host =“http://example.com/photos/”
我正在尝试加载图像:
mPicasso.load(photo.getImageUrl())代入(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$2.load(BitmapHunter.java:66)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.hunt(BitmapHunter.java:206)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at com.squareup.picasso.BitmapHunter.run(BitmapHunter.java:159)
03-01 14:06:49.856 19150-19150/com.basicflags W/System.err: at java.util.concurrent.Executors$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)
解决方法:
这里的问题是毕加索拒绝你的请求,因为它不承认请求的类型.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,并且应该事先做到这一点.您可以在Picasso.Builder
中添加Picasso.RequestTransformer
.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();
}
你可以在你的拦截器中处理其余部分
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您的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