如何从facebook获取电子邮件ID。我从以下代码获得了所有其他信息，但我想获得用户电子邮件ID，但它不会检索用户电子邮件。
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login_and_facebook);
initializeViews();
initializeOthers();
setListners();
setEditTextPostition();
}
private void setEditTextPostition() {
// TODO Auto-generated method stub
_etPassword.setPadding(60, 0, 0, 0);
_etUserName.setPadding(60, 0, 0, 0);
}
private void initializeOthers() {
// TODO Auto-generated method stub
// facebook = new Facebook(APP_ID);
// mAsyncRunner = new AsyncFacebookRunner(facebook);
Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
fb_session = Session
.openActiveSessionFromCache(getApplicationContext());
_clinet = new DefaultHttpClient();
_post = new HttpPost("http://appliconic.com/SG_Taxi/json.php");
_pDialogue = new ProgressDialog(this);
}
private void setListners() {
// TODO Auto-generated method stub
_bFacebookLogin.setOnTouchListener(this);
_bLogin.setOnTouchListener(this);
_bSignUp.setOnTouchListener(this);
}
private void initializeViews() {
// TODO Auto-generated method stub
_etPassword = (EditText) findViewById(R.id.etPasswordLogin);
_etUserName = (EditText) findViewById(R.id.etUserNameLogin);
_bFacebookLogin = (Button) findViewById(R.id.bFacebookLogin);
_bLogin = (Button) findViewById(R.id.bLogin);
_bSignUp = (Button) findViewById(R.id.bRegisterLogin);
}
public class CheckDataBase extends AsyncTask<String, Void, JSONObject> {
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
_pDialogue.setMessage("Please wait...");
_pDialogue.setCancelable(false);
_pDialogue.show();
}
@Override
protected JSONObject doInBackground(String... params) {
// TODO Auto-generated method stub
ArrayList<NameValuePair> l_nameValuePairs = new ArrayList<NameValuePair>();
l_nameValuePairs.add(new BasicNameValuePair("tag", "login"));
l_nameValuePairs
.add(new BasicNameValuePair("tag_type", "passenger"));
l_nameValuePairs.add(new BasicNameValuePair("login", "account"));
l_nameValuePairs.add(new BasicNameValuePair("txtb_email", ""
+ _etUserName.getText().toString().trim()));
l_nameValuePairs.add(new BasicNameValuePair("txtb_password", ""
+ _etPassword.getText().toString().trim()));
try {
_post.setEntity(new UrlEncodedFormEntity(l_nameValuePairs));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HttpResponse l_response = null;
try {
l_response = _clinet.execute(_post);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int status = l_response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity e = l_response.getEntity();
String l_data = null;
try {
l_data = EntityUtils.toString(e);
} catch (org.apache.http.ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
JSONObject l_jsonObject = null;
try {
l_jsonObject = new JSONObject(l_data);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return l_jsonObject;
}
return null;
}
@Override
protected void onPostExecute(JSONObject result) {
// TODO Auto-generated method stub
if (_pDialogue.isShowing()) {
_pDialogue.dismiss();
}
String l_successMsg = null;
String l_errorMsg = null;
try {
l_successMsg = result.getString("success_msg");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
l_errorMsg = result.getString("error_msg");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (l_errorMsg == null) {
Toast.makeText(getApplicationContext(), "" + l_successMsg,
Toast.LENGTH_SHORT).show();
startActivity(new Intent(getApplicationContext(),
ActivityNearDriverMap.class));
} else if (l_errorMsg.compareTo("YOU ARE ALREADY LOGGED IN") == 0) {
startActivity(new Intent(getApplicationContext(),
ActivityNearDriverMap.class));
} else {
Toast.makeText(getApplicationContext(), "" + l_errorMsg,
Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
new AlertDialog.Builder(this).setMessage("Do you want to Exit ? ")
.setPositiveButton("Ok", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
finish();
}
}).setNegativeButton("Cancel", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.dismiss();
}
}).setCancelable(false).show();
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.bFacebookLogin:
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (fb_session != null && fb_session.isOpened()) {
makeMeRequest(fb_session);
Log.i("Facebook Login State == >", "Facebook Login State");
} else {
if (fb_session == null) {
fb_session = new Session(getApplicationContext());
}
Session.setActiveSession(fb_session);
ConnectToFacebook();
Log.i("Facebook not Login State == >",
"Facebook Not login State");
}
// facebookLogin();
break;
case MotionEvent.ACTION_UP:
break;
}
break;
case R.id.bLogin:
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (_etUserName.getText().toString().compareTo("") != 0
&& _etPassword.getText().toString().compareTo("") != 0) {
_singletonObj.SetEmail(_etUserName.getText().toString()
.trim());
new CheckDataBase().execute("");
} else {
Toast.makeText(getApplicationContext(),
"Enter Info Properly", Toast.LENGTH_SHORT).show();
}
break;
case MotionEvent.ACTION_UP:
break;
}
break;
case R.id.bRegisterLogin:
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
startActivity(new Intent(getApplicationContext(),
ActivityRegistrationForm.class));
break;
case MotionEvent.ACTION_UP:
break;
}
break;
}
return true;
}
private void makeMeRequest(final Session session) {
Request request = Request.newMeRequest(session,
new Request.GraphUserCallback() {
@Override
public void onCompleted(GraphUser user, Response response) {
// TODO Auto-generated method stub
try {
if (user != null) {
String firstName = user.getFirstName();
String lastName = user.getLastName();
String id = user.getId();
//String Birth=user.getBirthday();
Log.e("facebookid", id);
Log.e("firstName", firstName);
Log.e("lastName", lastName);
//Log.e("Birthday",Birth);
Log.i("Nain",
"Email " + user.getProperty("email").toString());
Log.i("Response", response.toString());
// Toast.makeText(getApplicationContext(), name
// +FirstName+Email,Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
request.executeAsync();
}
private void ConnectToFacebook() {
Session session = Session.getActiveSession();
if (!session.isOpened() && !session.isClosed()) {
Log.i("ConnectToFacebook if == >", "ConnectToFacebook if");
OpenRequest newSession = new Session.OpenRequest(this);
newSession.setCallback(callback);
session.openForRead(newSession);
try {
Session.OpenRequest request = new Session.OpenRequest(this);
request.setPermissions(Arrays.asList("basic_info","email"));
} catch (Exception e) {
e.printStackTrace();
}
} else {
Log.i("ConnectToFacebook else == >", "ConnectToFacebook else");
Session.openActiveSession(this, true, callback);
}
}
private Session.StatusCallback callback = new Session.StatusCallback() {
public void call(final Session session, final SessionState state,
final Exception exception) {
onSessionStateChange(session, state, exception);
}
};
private void onSessionStateChange(final Session session,
SessionState state, Exception exception) {
if (session != null && session.isOpened()) {
makeMeRequest(session);
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(this, requestCode,
resultCode, data);
}
}
问题出在电子邮件中我收到了其他信息但是因电子邮件而变为空。