我想使用Facebook SDK 3.0 for Android来做一些简单的Graph请求。由于我不会使用Fragment，我无法使用Facebook开发人员文档中发布的示例。
我已经设置了一些简单的Activity，但它们没有用。我通过赏金here和here提出了问题。但这并没有真正帮助。
与此同时，我一直在阅读很多关于Facebook SDK的帖子并尝试了几十个小时，但没有成功。最后，我在this blog上找到了一个额外的代码示例。所以我设置了一个完整的Activity，即将所有朋友的家乡打印到LogCat。
但这也行不通。相反，它只询问基本权限（公共信息+朋友列表），然后退出。我究竟做错了什么？设置了Facebook应用程序的密钥哈希，包名和类名，并且没有任何有趣的内容打印到LogCat。
package com.my.package;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.widget.Toast;
import com.facebook.*;
public class FBRequest extends Activity {
private static final String PERMISSION_FRIENDS_HOMETOWN = "friends_hometown";
private static final String PREFERENCE_ACCESS_TOKEN = "facebookAccessToken";
private static final String PREFERENCE_EXPIRATION_DATE = "facebookAccessTokenExpires";
private ProgressDialog mProgress;
private SharedPreferences mPrefs;
private void showToast(final String text) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), text, Toast.LENGTH_LONG).show();
}
});
}
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
try {
startFacebookRequest();
}
catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session session = Session.getActiveSession();
if (session != null) {
session.onActivityResult(this, requestCode, resultCode, data);
}
}
public interface FacebookConnectHandler {
public void onSuccess();
public void onFailure();
}
public void startFacebookRequest() {
connectToFacebook(new FacebookConnectHandler() {
@Override
public void onSuccess() {
// safety check
if (isFinishing()) { return; }
showProgressDialog("Connecting to Facebook ...");
// check for publish permissions
final List<String> permissions_required = Arrays.asList(PERMISSION_FRIENDS_HOMETOWN);
if (Session.getActiveSession().getPermissions() == null || !Session.getActiveSession().getPermissions().containsAll(permissions_required)) {
// need to make a Session.openActiveSessionFromCache(...) call
// because of a bug in the Facebook sdk
// where a second call to get permissions
// won't result in a session callback when the token is updated
if (Session.openActiveSessionFromCache(FBRequest.this) == null) {
showToast("Could not connect to Facebook! (3)");
return;
}
Session.getActiveSession().addCallback(new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
if (exception != null || state.equals(SessionState.CLOSED) || state.equals(SessionState.CLOSED_LOGIN_FAILED)) {
// didn't get required permissions
session.removeCallback(this);
// safety check
if (!isFinishing()) {
showToast("Could not connect to Facebook! (4)");
}
}
else if (state.equals(SessionState.OPENED_TOKEN_UPDATED) && session.getPermissions().containsAll(permissions_required)) {
// got required permissions
session.removeCallback(this);
// safety check
if (!isFinishing()) {
startFacebookRequest();
}
}
}
});
Session.getActiveSession().requestNewReadPermissions(new Session.NewPermissionsRequest(FBRequest.this, permissions_required));
return;
}
startGraphRequest(Session.getActiveSession());
}
@Override
public void onFailure() {
cancelProgressDialog();
showToast("Could not connect to Facebook! (1)");
}
});
}
private void startGraphRequest(Session session) {
Request.executeGraphPathRequestAsync(session, "me/friends/?access_token="+session.getAccessToken()+"&fields=id,name,hometown&limit=500", new Request.Callback() {
@Override
public void onCompleted(Response response) {
if (response != null) {
try {
JSONArray jarr = response.getGraphObject().getInnerJSONObject().getJSONArray("data");
JSONObject entry;
StringBuilder backupStr = new StringBuilder();
int nExistingEntries = existingEntries.length;
for (int i = 0; i < jarr.length(); i++) {
entry = jarr.getJSONObject(i);
if (!entry.isNull("id") && !entry.isNull("name") && !entry.isNull("hometown")) {
System.out.println(entry.getString("hometown"));
}
}
}
catch (Exception e) {
e.printStackTrace();
showToast("Unexpected error!");
}
}
}
});
}
private void connectToFacebook(final FacebookConnectHandler handler) {
// check whether the user already has an active session
// and try opening it if we do
// (note: making a Session.openActiveSessionFromCache(...) call
// instead of simply checking whether the active session is opened
// because of a bug in the Facebook sdk
// where successive calls to update a token
// (requesting additional permissions etc)
// don't result in a session callback)
if (Session.getActiveSession() != null && Session.openActiveSessionFromCache(this) != null) {
handler.onSuccess();
return;
}
// initialise the session status callback
Session.StatusCallback callback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
if (isFinishing()) { return; }
// check session state
if (state.equals(SessionState.CLOSED) || state.equals(SessionState.CLOSED_LOGIN_FAILED)) {
clearFacebookSharedPreferences();
// specific action for when the session is closed
// because an open-session request failed
if (state.equals(SessionState.CLOSED_LOGIN_FAILED)) {
cancelProgressDialog();
handler.onFailure();
}
}
else if (state.equals(SessionState.OPENED)) {
cancelProgressDialog();
saveFacebookSharedPreferences(session.getAccessToken(), session.getExpirationDate().getTime());
showToast("Succeeded connecting to Facebook");
handler.onSuccess();
}
}
};
// make the call to open the session
showProgressDialog("Connecting to Facebook...");
if (Session.getActiveSession() == null && mPrefs.contains(PREFERENCE_ACCESS_TOKEN) && mPrefs.contains(PREFERENCE_EXPIRATION_DATE)) {
// open a session from the access token info
// saved in the app's shared preferences
String accessTokenString = mPrefs.getString(PREFERENCE_ACCESS_TOKEN, "");
Date accessTokenExpires = new Date(mPrefs.getLong(PREFERENCE_EXPIRATION_DATE, 0));
AccessToken accessToken = AccessToken.createFromExistingAccessToken(accessTokenString, accessTokenExpires, null, null, null);
Session.openActiveSessionWithAccessToken(this, accessToken, callback);
}
else {
// open a new session, logging in if necessary
Session.openActiveSession(this, true, callback);
}
}
private void saveFacebookSharedPreferences(final String token, final long expiration) {
if (mPrefs != null) {
SharedPreferences.Editor editor = mPrefs.edit();
editor.putString(PREFERENCE_ACCESS_TOKEN, token);
editor.putLong(PREFERENCE_EXPIRATION_DATE, expiration);
editor.commit();
}
}
private void clearFacebookSharedPreferences() {
if (mPrefs != null) {
SharedPreferences.Editor editor = mPrefs.edit();
editor.remove(PREFERENCE_ACCESS_TOKEN);
editor.remove(PREFERENCE_EXPIRATION_DATE);
editor.commit();
}
}
private void showProgressDialog(final String text) {
mProgress = ProgressDialog.show(getApplicationContext(), "Facebook", text, true, false);
}
private void cancelProgressDialog() {
if (mProgress != null) {
if (mProgress.isShowing()) {
mProgress.dismiss();
}
mProgress = null;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
cancelProgressDialog();
}
}
提前致谢！
修改：代码 有效，但我没有致电setContentView()，而Activity的{{1}}被调用了在一个错误的情况下。这就是为什么人们无法看到（扩展）权限的第二个请求。
答案 0 :(得分：9)
上面的代码工作正常，除了我做的小改动，即在显示进度对话框时，为此我已更改上下文给出异常窗口坏标记。我还评论了一条未使用'existingEntries'的行。
我能够登录和应用程序请求访问朋友家乡访问权限。我可以看到朋友ids和他们的家乡。
更新后的工作版本：
package com.example.options;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.widget.Toast;
import com.facebook.AccessToken;
import com.facebook.Request;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.Session.Builder;
import com.facebook.Session.NewPermissionsRequest;
import com.facebook.Session.OpenRequest;
import com.facebook.SessionLoginBehavior;
import com.facebook.SessionState;
public class FBRequest extends Activity {
private static final String PERMISSION_FRIENDS_HOMETOWN = "friends_hometown";
private static final String PREFERENCE_ACCESS_TOKEN = "facebookAccessToken";
private static final String PREFERENCE_EXPIRATION_DATE = "facebookAccessTokenExpires";
private ProgressDialog mProgress;
private SharedPreferences mPrefs;
private void showToast(final String text) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), text, Toast.LENGTH_LONG).show();
}
});
}
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
try {
startFacebookRequest();
}
catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == RESULT_OK && requestCode == Session.DEFAULT_AUTHORIZE_ACTIVITY_CODE)
{
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
Session session = Session.getActiveSession();
if (session != null && !session.isClosed())
{
startFacebookRequest();
}
}
}
public interface FacebookConnectHandler {
public void onSuccess();
public void onFailure();
}
public void startFacebookRequest() {
connectToFacebook(new FacebookConnectHandler() {
@Override
public void onSuccess() {
// safety check
if (isFinishing()) { return; }
showProgressDialog("Connecting to Facebook ...");
// check for publish permissions
final List<String> permissions_required = Arrays.asList(PERMISSION_FRIENDS_HOMETOWN);
if (Session.getActiveSession().getPermissions() == null || !Session.getActiveSession().getPermissions().containsAll(permissions_required)) {
// need to make a Session.openActiveSessionFromCache(...) call
// because of a bug in the Facebook sdk
// where a second call to get permissions
// won't result in a session callback when the token is updated
if (Session.openActiveSessionFromCache(FBRequest.this) == null) {
showToast("Could not connect to Facebook! (3)");
return;
}
Session.getActiveSession().addCallback(new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
if (exception != null || state.equals(SessionState.CLOSED) || state.equals(SessionState.CLOSED_LOGIN_FAILED)) {
// didn't get required permissions
session.removeCallback(this);
// safety check
if (!isFinishing()) {
showToast("Could not connect to Facebook! (4)");
}
}
else if (state.equals(SessionState.OPENED_TOKEN_UPDATED) && session.getPermissions().containsAll(permissions_required)) {
// got required permissions
session.removeCallback(this);
// safety check
if (!isFinishing()) {
startFacebookRequest();
}
}
}
});
NewPermissionsRequest req = new Session.NewPermissionsRequest(FBRequest.this, permissions_required);
req.setLoginBehavior(SessionLoginBehavior.SUPPRESS_SSO);
Session.getActiveSession().requestNewReadPermissions(req);
return;
}
startGraphRequest(Session.getActiveSession());
}
@Override
public void onFailure() {
cancelProgressDialog();
showToast("Could not connect to Facebook! (1)");
}
});
}
private void startGraphRequest(Session session) {
Request.executeGraphPathRequestAsync(session, "me/friends/?access_token="+session.getAccessToken()+"&fields=id,name,hometown&limit=500", new Request.Callback()
{
@Override
public void onCompleted(Response response) {
if (response != null) {
try {
JSONArray jarr = response.getGraphObject().getInnerJSONObject().getJSONArray("data");
JSONObject entry;
StringBuilder backupStr = new StringBuilder();
// int nExistingEntries = existingEntries.length;
for (int i = 0; i < jarr.length(); i++) {
entry = jarr.getJSONObject(i);
if (!entry.isNull("id") && !entry.isNull("name") && !entry.isNull("hometown")) {
System.out.println(entry.getString("hometown"));
}
}
}
catch (Exception e) {
e.printStackTrace();
showToast("Unexpected error!");
}
showToast("Friends list populated");
cancelProgressDialog();
}
}
});
}
private void connectToFacebook(final FacebookConnectHandler handler) {
// check whether the user already has an active session
// and try opening it if we do
// (note: making a Session.openActiveSessionFromCache(...) call
// instead of simply checking whether the active session is opened
// because of a bug in the Facebook sdk
// where successive calls to update a token
// (requesting additional permissions etc)
// don't result in a session callback)
if (Session.getActiveSession() != null && Session.openActiveSessionFromCache(this) != null) {
handler.onSuccess();
return;
}
// initialise the session status callback
Session.StatusCallback callback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
if (isFinishing()) { return; }
// check session state
if (state.equals(SessionState.CLOSED) || state.equals(SessionState.CLOSED_LOGIN_FAILED)) {
clearFacebookSharedPreferences();
// specific action for when the session is closed
// because an open-session request failed
if (state.equals(SessionState.CLOSED_LOGIN_FAILED)) {
cancelProgressDialog();
handler.onFailure();
}
}
else if (state.equals(SessionState.OPENED)) {
cancelProgressDialog();
saveFacebookSharedPreferences(session.getAccessToken(), session.getExpirationDate().getTime());
showToast("Succeeded connecting to Facebook");
handler.onSuccess();
}
}
};
// make the call to open the session
showProgressDialog("Connecting to Facebook...");
if (Session.getActiveSession() == null && mPrefs.contains(PREFERENCE_ACCESS_TOKEN) && mPrefs.contains(PREFERENCE_EXPIRATION_DATE)) {
// open a session from the access token info
// saved in the app's shared preferences
String accessTokenString = mPrefs.getString(PREFERENCE_ACCESS_TOKEN, "");
Date accessTokenExpires = new Date(mPrefs.getLong(PREFERENCE_EXPIRATION_DATE, 0));
AccessToken accessToken = AccessToken.createFromExistingAccessToken(accessTokenString, accessTokenExpires, null, null, null);
Session.openActiveSessionWithAccessToken(this, accessToken, callback);
}
else {
// open a new session, logging in if necessary
OpenRequest op = new Session.OpenRequest(this);
op.setLoginBehavior(SessionLoginBehavior.SUPPRESS_SSO);
op.setCallback(null);
List<String> permissions = new ArrayList<String>();
permissions.add(PERMISSION_FRIENDS_HOMETOWN);
op.setPermissions(permissions);
Session session = new Builder(this).build();
Session.setActiveSession(session);
session.openForRead(op);
}
}
private void saveFacebookSharedPreferences(final String token, final long expiration) {
if (mPrefs != null) {
SharedPreferences.Editor editor = mPrefs.edit();
editor.putString(PREFERENCE_ACCESS_TOKEN, token);
editor.putLong(PREFERENCE_EXPIRATION_DATE, expiration);
editor.commit();
}
}
private void clearFacebookSharedPreferences() {
if (mPrefs != null) {
SharedPreferences.Editor editor = mPrefs.edit();
editor.remove(PREFERENCE_ACCESS_TOKEN);
editor.remove(PREFERENCE_EXPIRATION_DATE);
editor.commit();
}
}
private void showProgressDialog(final String text) {
cancelProgressDialog();
mProgress = ProgressDialog.show(FBRequest.this, "Facebook", text, true, false);
}
private void cancelProgressDialog() {
if (mProgress != null) {
if (mProgress.isShowing()) {
mProgress.dismiss();
}
mProgress = null;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
cancelProgressDialog();
}
}
logcat的：
......
......
03-11 18:57:26.781: I/System.out(6729): {"id":"10555075614xxxx","name":"Khammam"}
03-11 18:57:26.781: I/System.out(6729): {"id":"11042167564xxxx","name":"Warangal, India"}
03-11 18:57:26.789: I/System.out(6729): {"id":"11042167564xxxx","name":"Warangal, India"}
03-11 18:57:26.796: I/System.out(6729): {"id":"13074615695xxxx","name":"Jaggayyapet, India"}
03-11 18:57:26.812: I/System.out(6729): {"id":"12530386417xxxx","name":"Kodada, India"}
03-11 18:57:26.812: I/System.out(6729): {"id":"11047265564xxxx","name":"Vishakhapatnam, Andhra Pradesh, India"}
<强>更新
首次登录时会询问所有权限，并删除了SSO登录，因为我没有使用本机应用程序（使用密钥库散列密钥）配置我的Facebook应用程序。
答案 1 :(得分：-2)
在facebook SDK https://github.com/facebook/facebook-android-sdk/
之后使用以下是您的要求的代码（从Facebook获取好友列表）
try {
Facebook mFacebook = new Facebook(Constants.FB_APP_ID);
AsyncFacebookRunner mAsyncRunner = new AsyncFacebookRunner(mFacebook);
Bundle bundle = new Bundle();
bundle.putString("fields", "birthday");
mFacebook.request("me/friends", bundle, new FriendListRequestListener());
} catch(Exception e){
Log.e(Constants.LOGTAG, " " + CLASSTAG + " Exception = "+e.getMessage());
}
public class FriendListRequestListener extends BaseRequestListener {
public void onComplete(final String response) {
_error = null;
try {
JSONObject json = Util.parseJson(response);
final JSONArray friends = json.getJSONArray("data");
FacebookActivity.this.runOnUiThread(new Runnable() {
public void run() {
// Do stuff here with your friends array,
// which is an array of JSONObjects.
}
});
} catch (JSONException e) {
_error = "JSON Error in response";
} catch (FacebookError e) {
_error = "Facebook Error: " + e.getMessage();
}
if (_error != null)
{
FacebookActivity.this.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "Error occurred: " +
_error, Toast.LENGTH_LONG).show();
}
});
}
}
}
我希望它可以帮助你和...其他。