这包括与存储在SharedPreferences（你可以用你的数据库）实的access_token共享。但access_token已过期日期和时间（至少一次您需要登录以避免过期）
public class ShareActivity extends Activity {
private ProgressDialog pDialog;
SharedPreferences prefs;
@SuppressLint("NewApi")
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
pDialog = new ProgressDialog(this);
pDialog.setMessage("loading");
pDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
pDialog.setCanceledOnTouchOutside(false);
prefs = PreferenceManager.getDefaultSharedPreferences(ShareActivity.this);
Log.d("accesstoken shared", prefs.getString(Strings.accesToken, ""));
AccessToken at = AccessToken.createFromExistingAccessToken(prefs.getString(Strings.accesToken, ""), null, null, null, null);
Session.openActiveSessionWithAccessToken(getApplicationContext(), at, new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
if (session.isOpened()) {
Session.setActiveSession(session);
publishFeedDialog(session);
likePage();
}
}
});
}
/**
*
* @param session
*
* Sends the request to post the message as a feed.
*/
private void publishFeedDialog(Session session) {
Bundle postParams = new Bundle();
postParams.putString("message", getIntent().getStringExtra("message"));
postParams.putString("access_token", session.getAccessToken());
Request request = new Request(null, prefs.getString(Strings.pageID, "") + "/feed", postParams, HttpMethod.POST, callback);
RequestAsyncTask newtask = new RequestAsyncTask(request);
newtask.execute();
}
/**
*
* Callback Listener for facebook post
*
*/
Request.Callback callback = new Request.Callback() {
public void onCompleted(Response response) {
FacebookRequestError error = response.getError();
if (error != null) {
Log.e("FACEBOOK ERROR", "" + error.getErrorMessage());
pDialog.dismiss();
Toast.makeText(ShareActivity.this, "Posting failed...", Toast.LENGTH_LONG).show();
finish();
} else {
JSONObject graphResponse = response.getGraphObject().getInnerJSONObject();
String postId = null;
try {
postId = graphResponse.getString("id");
Log.d("post id", postId);
pDialog.dismiss();
Toast.makeText(ShareActivity.this, "Feedback Post successful", Toast.LENGTH_LONG).show();
finish();
} catch (JSONException e) {
Log.d("Share Activity Json exception", e.getMessage(), e);
}
}
}
};
/**
*
* Likes the fb page
*
*/
private void likePage() {
Bundle params = new Bundle();
params.putString("object", "http://samples.ogp.me/" + prefs.getString(Strings.pageID, ""));
Request nrequest = new Request(null, "me/og.likes", params, HttpMethod.POST);
RequestAsyncTask task = new RequestAsyncTask(nrequest);
task.execute();
facebookLogout();
}
/**
*
* This must be called if facebook api is used. Once the4 user is logged in,
* the session is set here.
*
*/
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}
/**
* This will logout the user from Facebook
*/
public void facebookLogout() {
Session session = Session.getActiveSession();
if (session != null) {
if (!session.isClosed()) {
session.closeAndClearTokenInformation();
}
} else {
session = new Session(this);
Session.setActiveSession(session);
session.closeAndClearTokenInformation();
}
AccountManager manager = (AccountManager) getSystemService(ACCOUNT_SERVICE);
Account[] accountsList = manager.getAccountsByType("com.facebook.auth.login");
for (int i = 0; i < accountsList.length; i++) {
manager.removeAccount(accountsList[i], null, null);
}
}
@Override
protected void onStop() {
super.onStop();
pDialog.dismiss();
}
@Override
protected void onStart() {
super.onStart();
pDialog.show();
}
}