我一直在尝试从twitter api的带有Id响应的搜索推文中提取图像url。url存在于includes->响应中的媒体阵列。但当我尝试使用twitter java Sdk获得它时，它并没有出现在他们的屏幕上。以下是Sdk的链接：Twitter官方Java Sdk
https://api.twitter.com/2/tweets?ids=1102112466283175936,1553802769207037953,1552279853633835009&tweet.fields=author_id,entities,attachments,conversation_id,created_at,referenced_tweets&expansions=attachments.media_keys&media.fields=url,type
Twitter api请求
JSON响应
{
"data": [
{
"text": "5000 selfies make up this iconic image of @jeremycorbyn in today's @ObserverUK, calling on him to bring courage and leadership to unite @UKLabour MPs behind a #PublicVote on #Brexit. RT to support! ",
"attachments": {
"media_keys": [
"3_1102112450588147712"
]
},
"entities": {
"hashtags": [
{
"start": 159,
"end": 170,
"tag": "PublicVote"
},
{
"start": 174,
"end": 181,
"tag": "Brexit"
}
],
"urls": [
{
"start": 198,
"end": 221,
"expanded_url": "https://twitter.com/Avaaz/status/1102112466283175936/photo/1",
"display_url": "pic.twitter.com/RAQN3rvXOc",
"media_key": "3_1102112450588147712"
}
],
"mentions": [
{
"start": 42,
"end": 55,
"username": "jeremycorbyn",
"id": "117777690"
},
{
"start": 67,
"end": 78,
"username": "ObserverUK",
"id": "1017383741919023104"
},
{
"start": 136,
"end": 145,
"username": "UKLabour",
"id": "14291684"
}
]
},
"id": "1102112466283175936",
"created_at": "2019-03-03T07:44:22.000Z",
"conversation_id": "1102112466283175936",
"author_id": "2553151"
},
{
"text": "@oldschoolmonk My current favorite doge meme 😂❤️ ",
"attachments": {
"media_keys": [
"3_1553802763171414016"
]
},
"id": "1553802769207037953",
"created_at": "2022-07-31T18:00:23.000Z",
"conversation_id": "1553801521476669440",
"referenced_tweets": [
{
"type": "replied_to",
"id": "1553801521476669440"
}
],
"entities": {
"urls": [
{
"start": 49,
"end": 72,
"expanded_url": "https://twitter.com/Pareshaan_aatma/status/1553802769207037953/photo/1",
"display_url": "pic.twitter.com/Gp8FBBHmHO",
"media_key": "3_1553802763171414016"
}
],
"mentions": [
{
"start": 0,
"end": 14,
"username": "oldschoolmonk",
"id": "135241813"
}
]
},
"author_id": "224239908"
},
{
"text": "I've just found out that 3 of my Samsung phones' batteries have blown up because of the recent UK heatwave nnNot a single other brand has 🤔 ",
"attachments": {
"media_keys": [
"3_1552279848432844800",
"3_1552279848416169987"
]
},
"id": "1552279853633835009",
"created_at": "2022-07-27T13:08:51.000Z",
"entities": {
"annotations": [
{
"start": 33,
"end": 39,
"probability": 0.8414,
"type": "Product",
"normalized_text": "Samsung"
},
{
"start": 95,
"end": 96,
"probability": 0.5409,
"type": "Place",
"normalized_text": "UK"
}
],
"urls": [
{
"start": 140,
"end": 163,
"expanded_url": "https://twitter.com/Mrwhosetheboss/status/1552279853633835009/photo/1",
"display_url": "pic.twitter.com/LI6Qrz8xSv",
"media_key": "3_1552279848432844800"
},
{
"start": 140,
"end": 163,
"expanded_url": "https://twitter.com/Mrwhosetheboss/status/1552279853633835009/photo/1",
"display_url": "pic.twitter.com/LI6Qrz8xSv",
"media_key": "3_1552279848416169987"
}
]
},
"conversation_id": "1552279853633835009",
"author_id": "3363946175"
}
],
"includes": {
"media": [
{
"media_key": "3_1102112450588147712",
"type": "photo",
"url": "https://pbs.twimg.com/media/D0t9bz_XgAAl3hD.jpg"
},
{
"media_key": "3_1553802763171414016",
"type": "photo",
"url": "https://pbs.twimg.com/media/FZA3YXXaQAAOnma.jpg"
},
{
"media_key": "3_1552279848432844800",
"type": "photo",
"url": "https://pbs.twimg.com/media/FYrOTD3WQAA0tvt.jpg"
},
{
"media_key": "3_1552279848416169987",
"type": "photo",
"url": "https://pbs.twimg.com/media/FYrOTDzX0AMBSnE.jpg"
}
]
}
}
tl；dr
截至本文撰写之时(v2.0.1(，没有直接方法来检索完全水合的Tweet对象。
长版本
要检索完全水合的Tweet对象，首先需要在客户端上启用字段扩展。
final Get2TweetsSearchRecentResponse response =
twitterApi.tweets()
.tweetsRecentSearch(queryString.toString())
.expansions(TwitterEntityFields.getExpansions())
.mediaFields(TwitterEntityFields.getMediaFields())
.placeFields(TwitterEntityFields.getPlaceFields())
.userFields(TwitterEntityFields.getUserFields())
.tweetFields(TwitterEntityFields.getTweetFields())
.maxResults(maxNoOfTweets)
.execute(connectionRetries);
TwitterEntityFields类似于，它封装了所有需要扩展的字段。
public abstract class TwitterEntityFields {
private final static Set<String> TWEET_FIELDS = new HashSet<>();
private final static Set<String> PLACE_FIELDS = new HashSet<>();
private final static Set<String> MEDIA_FIELDS = new HashSet<>();
private final static Set<String> USER_FIELDS = new HashSet<>();
private final static Set<String> EXPANSIONS = new HashSet<>();
static {
TWEET_FIELDS.add("author_id");
TWEET_FIELDS.add("id");
TWEET_FIELDS.add("created_at");
TWEET_FIELDS.add("public_metrics");
TWEET_FIELDS.add("entities");
TWEET_FIELDS.add("geo");
TWEET_FIELDS.add("lang");
TWEET_FIELDS.add("source");
TWEET_FIELDS.add("referenced_tweets");
TWEET_FIELDS.add("in_reply_to_user_id");
PLACE_FIELDS.add("country");
PLACE_FIELDS.add("geo");
PLACE_FIELDS.add("name");
PLACE_FIELDS.add("place_type");
PLACE_FIELDS.add("contained_within");
MEDIA_FIELDS.add("duration_ms");
MEDIA_FIELDS.add("height");
MEDIA_FIELDS.add("media_key");
MEDIA_FIELDS.add("preview_image_url");
MEDIA_FIELDS.add("public_metrics");
MEDIA_FIELDS.add("width");
MEDIA_FIELDS.add("url");
EXPANSIONS.add("author_id");
EXPANSIONS.add("attachments.media_keys");
EXPANSIONS.add("geo.place_id");
USER_FIELDS.add("created_at");
USER_FIELDS.add("description");
USER_FIELDS.add("location");
USER_FIELDS.add("profile_image_url");
USER_FIELDS.add("protected");
USER_FIELDS.add("public_metrics");
USER_FIELDS.add("url");
USER_FIELDS.add("verified");
}
public static Set<String> getTweetFields() {
return Collections.unmodifiableSet(TWEET_FIELDS);
}
public static Set<String> getPlaceFields() {
return Collections.unmodifiableSet(PLACE_FIELDS);
}
public static Set<String> getMediaFields() {
return Collections.unmodifiableSet(MEDIA_FIELDS);
}
public static Set<String> getUserFields() {
return Collections.unmodifiableSet(USER_FIELDS);
}
public static Set<String> getExpansions() {
return Collections.unmodifiableSet(EXPANSIONS);
}
}
接下来，您需要将媒体密钥(包含在Tweet的attachments中(映射到相应的扩展Media对象
要做到这一点，你可以做一些类似的事情
public class TweetAdapter {
private final Tweet tweet;
private final Set<CashtagEntity> symbols = new HashSet<>();
private final Set<HashtagEntity> hashtags = new HashSet<>();
private final Set<MentionEntity> mentions = new HashSet<>();
private final Set<UrlEntity> urls = new HashSet<>();
private final Set<Media> media = new HashSet<>();
private final User user;
private final Place place;
public TweetAdapter(Tweet tweet, Expansions expansions) {
assert (tweet != null);
assert (expansions != null);
this.tweet = tweet;
collectTextEntities(tweet);
this.place = collectPlaces(expansions);
this.media.addAll(collectMedia(expansions));
this.user = collectUser(expansions);
}
private User collectUser(Expansions expansions) {
if (expansions != null && expansions.getUsers() != null) {
for (User user : expansions.getUsers()) {
if (user.getId().equals(tweet.getAuthorId())) {
return user;
}
}
}
throw new RuntimeException("Could not extract Tweet's author. Tweet with ID = " + tweet.getId());
}
private Set<Media> collectMedia(Expansions expansions) {
final Set<Media> result = new HashSet<>();
if (expansions != null) {
final TweetAttachments attachments = tweet.getAttachments();
final List<Media> media = expansions.getMedia();
if (attachments != null && media != null) {
if (attachments.getMediaKeys() != null) {
for (String mKey : attachments.getMediaKeys()) {
for (Media m : media) {
if (m.getMediaKey() != null && m.getMediaKey().equals(mKey)) {
result.add(m);
}
}
}
}
}
}
return result;
}
private Place collectPlaces(Expansions expansions) {
if (expansions != null
&& tweet.getGeo() != null
&& expansions.getPlaces() != null) {
final String placeId = tweet.getGeo().getPlaceId();
for (Place place : expansions.getPlaces()) {
if (place.getId().equals(placeId)) {
return place;
}
}
}
return null;
}
private void collectTextEntities(Tweet tweet) {
final FullTextEntities entities = tweet.getEntities();
if (entities != null) {
if (entities.getCashtags() != null) {
for (CashtagEntity c : entities.getCashtags()) {
symbols.add(c);
}
}
if (entities.getHashtags() != null) {
for (HashtagEntity c : entities.getHashtags()) {
hashtags.add(c);
}
}
if (entities.getMentions() != null) {
for (MentionEntity c : entities.getMentions()) {
mentions.add(c);
}
}
if (entities.getUrls() != null) {
for (UrlEntity c : entities.getUrls()) {
urls.add(c);
}
}
}
}
// getters
}
这将提供完全水合的CCD_ 7。
检索Media对象的URL可以归结为：
if (media instanceof Video v) {
return v.getPreviewImageUrl() != null ? v.getPreviewImageUrl().toString() : Constants.EMPTY_STRING;
}
if (media instanceof Photo v) {
return v.getUrl() != null ? v.getUrl().toString() : Constants.EMPTY_STRING;
}
if (media instanceof AnimatedGif v) {
return v.getPreviewImageUrl() != null ? v.getPreviewImageUrl().toString() : Constants.EMPTY_STRING;
}