如何使用图形api获取Facebook用户相册？
如何使用图形api获取Facebook用户相册？
提问于 2012-09-12 17:07:27
如何从facebook获取所有用户相册。我用这个Url https://graph.facebook.com/me/albums?access_token=xxxx尝试了一下
我用的是这段代码，我提到的这个权限也是"user_photos"。
Bundle parameters = new Bundle();
parameters.putString("format", "json");
parameters.putString("method", "user_photos");
parameters.putString(TOKEN, facebook.getAccessToken());
JSONObject response = null;
try {
response = Util.parseJson(Album_Url);
JSONArray array = obj.optJSONArray("data");
for(int i = 0; i<array.length(); i++){
JSONObject main_obj = array.getJSONObject(i);
String album = main_obj.getString("name");
}
} catch (JSONException e1) {
e1.printStackTrace();
} catch (FacebookError e1) {
e1.printStackTrace();
}但是我在log cat 09-12 14:27:42.990: W/System.err(12189): org.json.JSONException: Value https of type java.lang.String cannot be converted to JSONObject中得到了这个。
我也试过这样
try {
Bundle parameters = new Bundle();
parameters.putString("format", "json");
parameters.putString(TOKEN, facebook.getAccessToken()) ;
String response = null;
try {
response = Util.openUrl(Album_Url, "GET", parameters);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
JSONObject obj = Util.parseJson(response);
JSONArray array = obj.optJSONArray("data");
for(int i = 0; i<array.length(); i++){
JSONObject main_obj = array.getJSONObject(i);
String album = main_obj.getString("name");
}
} catch (JSONException e1) {
e1.printStackTrace();
} catch (FacebookError e1) {
e1.printStackTrace();
} 我收到了这个错误09-12 14:42:36.920: W/System.err(12259): com.facebook.android.FacebookError: Malformed access token
Stack Overflow用户
回答已采纳
发布于 2012-09-12 17:59:33
在onCreate()方法中，我调用此Asynctask
private class getAlbumsData extends AsyncTask<Void, Void, Void> {
LinearLayout linlaHeaderProgress = (LinearLayout) findViewById(R.id.linlaHeaderProgress);
@Override
protected void onPreExecute() {
// SHOW THE PROGRESS BAR (SPINNER) WHILE LOADING ALBUMS
linlaHeaderProgress.setVisibility(View.VISIBLE);
}
@Override
protected Void doInBackground(Void... params) {
// CHANGE THE LOADING MORE STATUS TO PREVENT DUPLICATE CALLS FOR
// MORE DATA WHILE LOADING A BATCH
loadingMore = true;
// SET THE INITIAL URL TO GET THE FIRST LOT OF ALBUMS
URL = "https://graph.facebook.com/" + initialUserID
+ "/albums&access_token="
+ Utility.mFacebook.getAccessToken() + "?limit=10";
try {
HttpClient hc = new DefaultHttpClient();
HttpGet get = new HttpGet(URL);
HttpResponse rp = hc.execute(get);
if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
String queryAlbums = EntityUtils.toString(rp.getEntity());
JSONObject JOTemp = new JSONObject(queryAlbums);
JSONArray JAAlbums = JOTemp.getJSONArray("data");
if (JAAlbums.length() == 0) {
stopLoadingData = true;
Runnable run = new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"No more Albums", Toast.LENGTH_SHORT)
.show();
}
};
Albums.this.runOnUiThread(run);
} else {
// PAGING JSONOBJECT
if (JOTemp.has("paging")) {
JSONObject JOPaging = JOTemp.getJSONObject("paging");
if (JOPaging.has("next")) {
String initialpagingURL = JOPaging
.getString("next");
String[] parts = initialpagingURL.split("limit=10");
String getLimit = parts[1];
pagingURL = "https://graph.facebook.com/"
+ initialUserID + "/albums&access_token="
+ Utility.mFacebook.getAccessToken()
+ "?limit=10" + getLimit;
} else {
stopLoadingData = true;
Runnable run = new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"No more Albums",
Toast.LENGTH_SHORT).show();
}
};
Albums.this.runOnUiThread(run);
}
} else {
stopLoadingData = true;
Runnable run = new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"No more Albums",
Toast.LENGTH_SHORT).show();
}
};
Albums.this.runOnUiThread(run);
}
getAlbums albums;
for (int i = 0; i < JAAlbums.length(); i++) {
JSONObject JOAlbums = JAAlbums.getJSONObject(i);
if (JOAlbums.has("link")) {
albums = new getAlbums();
// GET THE ALBUM ID
if (JOAlbums.has("id")) {
albums.setAlbumID(JOAlbums.getString("id"));
} else {
albums.setAlbumID(null);
}
// GET THE ALBUM NAME
if (JOAlbums.has("name")) {
albums.setAlbumName(JOAlbums
.getString("name"));
} else {
albums.setAlbumName(null);
}
// GET THE ALBUM COVER PHOTO
if (JOAlbums.has("cover_photo")) {
albums.setAlbumCover("https://graph.facebook.com/"
+ JOAlbums.getString("cover_photo")
+ "/picture?type=normal"
+ "&access_token="
+ Utility.mFacebook
.getAccessToken());
} else {
albums.setAlbumCover("https://graph.facebook.com/"
+ JOAlbums.getString("id")
+ "/picture?type=album"
+ "&access_token="
+ Utility.mFacebook
.getAccessToken());
}
// GET THE ALBUM'S PHOTO COUNT
if (JOAlbums.has("count")) {
albums.setAlbumPhotoCount(JOAlbums
.getString("count"));
} else {
albums.setAlbumPhotoCount("0");
}
arrAlbums.add(albums);
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// SET THE ADAPTER TO THE LISTVIEW
lv.setAdapter(adapter);
// CHANGE THE LOADING MORE STATUS
loadingMore = false;
// HIDE THE PROGRESS BAR (SPINNER) AFTER LOADING ALBUMS
linlaHeaderProgress.setVisibility(View.GONE);
}
}为了完整起见，下面是我用来获取一个永无止境列表的分页URLS：
private class loadMoreAlbums extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// SHOW THE BOTTOM PROGRESS BAR (SPINNER) WHILE LOADING MORE ALBUMS
linlaProgressBar.setVisibility(View.VISIBLE);
}
@Override
protected Void doInBackground(Void... params) {
// SET LOADING MORE "TRUE"
loadingMore = true;
// INCREMENT CURRENT PAGE
current_page += 1;
// Next page request
URL = pagingURL;
// Log.e("NEW URL", URL);
try {
HttpClient hc = new DefaultHttpClient();
HttpGet get = new HttpGet(URL);
HttpResponse rp = hc.execute(get);
if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
String queryAlbums = EntityUtils.toString(rp.getEntity());
// Log.e("RESULT", queryAlbums);
JSONObject JOTemp = new JSONObject(queryAlbums);
JSONArray JAAlbums = JOTemp.getJSONArray("data");
if (JAAlbums.length() == 0) {
stopLoadingData = true;
Runnable run = new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"No more Albums", Toast.LENGTH_SHORT)
.show();
}
};
Albums.this.runOnUiThread(run);
} else {
// PAGING JSONOBJECT
JSONObject JOPaging = JOTemp.getJSONObject("paging");
// Log.e("PAGING", JOPaging.toString());
if (JOPaging.has("next")) {
String initialpagingURL = JOPaging
.getString("next");
// Log.e("initialpagingURL", initialpagingURL);
String[] parts = initialpagingURL.split("limit=10");
String getLimit = parts[1];
pagingURL = "https://graph.facebook.com/"
+ initialUserID + "/albums&access_token="
+ Utility.mFacebook.getAccessToken()
+ "?limit=10" + getLimit;
// Log.e("NEW PAGING URL", pagingURL);
} else {
stopLoadingData = true;
Runnable run = new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"No more Albums available",
Toast.LENGTH_SHORT).show();
}
};
Albums.this.runOnUiThread(run);
}
getAlbums albums;
for (int i = 0; i < JAAlbums.length(); i++) {
JSONObject JOAlbums = JAAlbums.getJSONObject(i);
// Log.e("INDIVIDUAL ALBUMS", JOAlbums.toString());
if (JOAlbums.has("link")) {
albums = new getAlbums();
// GET THE ALBUM ID
if (JOAlbums.has("id")) {
albums.setAlbumID(JOAlbums.getString("id"));
} else {
albums.setAlbumID(null);
}
// GET THE ALBUM NAME
if (JOAlbums.has("name")) {
albums.setAlbumName(JOAlbums
.getString("name"));
} else {
albums.setAlbumName(null);
}
// GET THE ALBUM COVER PHOTO
if (JOAlbums.has("cover_photo")) {
albums.setAlbumCover("https://graph.facebook.com/"
+ JOAlbums.getString("cover_photo")
+ "/picture?type=album"
+ "&access_token="
+ Utility.mFacebook
.getAccessToken());
} else {
albums.setAlbumCover("https://graph.facebook.com/"
+ JOAlbums.getString("id")
+ "/picture?type=album"
+ "&access_token="
+ Utility.mFacebook
.getAccessToken());
}
// GET THE ALBUM'S PHOTO COUNT
if (JOAlbums.has("count")) {
albums.setAlbumPhotoCount(JOAlbums
.getString("count"));
} else {
albums.setAlbumPhotoCount("0");
}
arrAlbums.add(albums);
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// get listview current position - used to maintain scroll position
int currentPosition = lv.getFirstVisiblePosition();
// APPEND NEW DATA TO THE ARRAYLIST AND SET THE ADAPTER TO THE
// LISTVIEW
adapter = new AlbumsAdapter(Albums.this, arrAlbums);
lv.setAdapter(adapter);
// Setting new scroll position
lv.setSelectionFromTop(currentPosition + 1, 0);
// SET LOADINGMORE "FALSE" AFTER ADDING NEW FEEDS TO THE EXISTING
// LIST
loadingMore = false;
// HIDE THE BOTTOM PROGRESS BAR (SPINNER) AFTER LOADING MORE ALBUMS
linlaProgressBar.setVisibility(View.GONE);
}
}loadMoreAlbums Asynctask是从onCreate()中的onScrollListener设置运行的
lv.setOnScrollListener(new OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
int lastInScreen = firstVisibleItem + visibleItemCount;
if ((lastInScreen == totalItemCount) && !(loadingMore)) {
if (stopLoadingData == false) {
// FETCH THE NEXT BATCH OF FEEDS
new loadMoreAlbums().execute();
}
}
}
});您可以从我的代码中选择相关的部分，也可以完整地使用它(当然是在填充了几个空白之后)。希望这能对你有所帮助。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/12384717
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