Get trough json parse user name and id from facebook graph

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http://stackoverflow.com – I am new with facebook api. I tried multiply tutorials but nothing works out for me... I am using api level 10, platform 2.3.3, the connections works fine, but when i log out and open the application again it should show me the welcome text with me name but instead the application crash... The Code: package com.example.kamehameha; import java.io.IOException; import java.net.MalformedURLException; import org.json.JSONException; import org.json.JSONObject; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import (HowTos)