Blank Screen during facebook login

Blank Screen during facebook login

i am using facebook login in my application and its working fine, but
problem is that when i click the login button, it shows the blank screen
for a moment, i want to use the my own asynctask instead of facebook.

here is my code.
ublic class SDLoginActivity extends Activity {
private static final String TAG = SDLoginActivity.class.getSimpleName();
private ImageButton imgbtnFacebookLogin;
private TextView tvUserDetails;
private int counter = 0;
private Session.StatusCallback statusCallback = new SessionStatusCallback();
// ---------------------------------------------------------------------
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Utilities.showToast(SDLoginActivity.this, "Data == " + data);
Session.getActiveSession().onActivityResult(this, requestCode,
resultCode, data);
}
// ---------------------------------------------------------------------
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Logger.logger("inside " + TAG);
setContentView(R.layout.login_layout);
imgbtnFacebookLogin = (ImageButton) findViewById(R.id.btn_fb_login);
tvUserDetails = (TextView) findViewById(R.id.tv_user_details);
Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
Session session = Session.getActiveSession();
if (session == null) {
if (savedInstanceState != null) {
session = Session.restoreSession(this, null, statusCallback,
savedInstanceState);
}
if (session == null) {
session = new Session(this);
}
Session.setActiveSession(session);
if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) {
session.openForRead(new
Session.OpenRequest(this).setCallback(statusCallback));
}
}
imgbtnFacebookLogin.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
tvUserDetails.setText("");
onClickLogin();
}
});
// updateView(session);
}
// ---------------------------------------------------------------------
private class SessionStatusCallback implements Session.StatusCallback {
@Override
public void call(Session session, SessionState state, Exception
exception) {
if (session.isOpened()) {
updateView(session);
}
}
}
// ---------------------------------------------------------------------
@Override
public void onStart() {
super.onStart();
Session.getActiveSession().addCallback(statusCallback);
}
// ---------------------------------------------------------------------
@Override
public void onStop() {
super.onStop();
Session.getActiveSession().removeCallback(statusCallback);
}
// ---------------------------------------------------------------------
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Session session = Session.getActiveSession();
Session.saveSession(session, outState);
}
// ---------------------------------------------------------------------
private void updateView(Session session) {
Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
@Override
public void onCompleted(GraphUser user, Response response) {
if (user != null) {
Logger.logger(TAG, "======================User
Data===================" + user.toString());
Logger.logger(TAG, "strFbName=======" + user.getName());
Logger.logger(TAG, "strProfileUrl=======" +
"https://graph.facebook.com/" + user.getId() +
"/picture?type=large");
Logger.logger(TAG, "USER_GENDER=======" +
user.getProperty("gender").toString());
Logger.logger(TAG, "strFbId=======" + user.getId());
Logger.logger(TAG, "strFbName=======" + user.getName());
Logger.logger(TAG, "strFbUId=======" + user.getId());
Logger.logger(TAG, "strFbLastName=======" +
user.getLastName());
Logger.logger(TAG,
"==================================================");
counter++;
Utilities.showToast(SDLoginActivity.this, "OnCompleted
called " + counter);
tvUserDetails.setText(user.getName());
Utilities.startNewActivity(SDLoginActivity.this, new
Intent(SDLoginActivity.this, ShareOnFbActivity.class));
}
}
});
}
// ---------------------------------------------------------------------
private void onClickLogin() {
Session session = Session.getActiveSession();
if (!session.isOpened() && !session.isClosed()) {
openMyActiveSession(this, true, statusCallback,
Arrays.asList("email", "status_update"));
} else {
Session.openActiveSession(this, true, statusCallback);
}
}
// ---------------------------------------------------------------------
private static Session openMyActiveSession(Activity activity, boolean
allowLoginUI, StatusCallback callback, List<String> permissions) {
OpenRequest openRequest = new
OpenRequest(activity).setPermissions(permissions).setCallback(callback);
Session session = new Builder(activity).build();
if (SessionState.CREATED_TOKEN_LOADED.equals(session.getState()) ||
allowLoginUI) {
Session.setActiveSession(session);
session.openForRead(openRequest);
return session;
}
return null;
}
}