Android: Facebook get “User Access Token”, on successful login

Question

I have been doing some login project via Facebook latest SDK i.e. 3.0. I\'m getting a hard time in getting user access token. I have searched on the internet and all, maximu

Answer 1

I successfully managed to integrate the Facebook sdk in my my with the help of following code:

public class MainActivity extends Activity implements OnClickListener {
    Facebook fb;
    Button button;
    SharedPreferences sp;
    //TextView welcome;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String APP_ID = getString(R.string.APP_ID);
        fb=new Facebook(APP_ID);

        sp=getPreferences(MODE_PRIVATE);
        String access_token=sp.getString("access token",null);
        long expires=sp.getLong("access expires",0);

        if(access_token!=null){
            fb.setAccessToken(access_token);
        }
        if(expires!=0){
            fb.setAccessExpires(expires);
        }



        button=(Button)findViewById(R.id.login);
        //pic=(ImageView)findViewById(R.id.picture_pic);
        button.setOnClickListener(this);
        updateButtonImage();
    }

    private void updateButtonImage() {
        // TODO Auto-generated method stub
        if(fb.isSessionValid()){
            try{
                //post.setVisibility(Button.VISIBLE);
                button.setBackgroundResource(R.drawable.logout_button);
                /*pic.setVisibility(ImageView.VISIBLE);

                JSONObject obj=null;
                URL img_url = null;
                String jsonuser=fb.request("me");
                obj=Util.parseJson(jsonuser);

                String id = obj.optString("id");
                String name = obj.optString("name");
                welcome.setText("Welcome  "+name);
                img_url=new URL("http://graph.facebook.com/"+id+"/picture?type=large");
                Bitmap bmp =  BitmapFactory.decodeStream(img_url.openConnection().getInputStream());
                pic.setImageBitmap(bmp);*/
                buttonClicks();
                }catch(Exception e){
                    e.printStackTrace();
                }

        }else{
            //post.setVisibility(Button.INVISIBLE);
            button.setBackgroundResource(R.drawable.login_button);
            //pic.setVisibility(ImageView.INVISIBLE);
        }
    }

    public void buttonClicks()
    {
            Bundle params = new Bundle();
            params.putString("image", "your string");


            fb.dialog(MainActivity.this, "feed", params, new DialogListener(){

                @Override
                public void onComplete(Bundle values) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onFacebookError(FacebookError e) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onError(DialogError e) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onCancel() {
                    // TODO Auto-generated method stub

                }

            });
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        if(fb.isSessionValid()){
            //button close our session - log out facebook
            try {
                fb.logout(getApplicationContext());
                updateButtonImage();
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }else{
            //login to fb
            fb.authorize(MainActivity.this, new String[] {"email"}, new DialogListener(){

                @Override
                public void onComplete(Bundle values) {
                    // TODO Auto-generated method stub
                    Editor editor=sp.edit();
                    editor.putString("access_token", fb.getAccessToken());
                    editor.putLong("access expires", fb.getAccessExpires());
                    editor.commit();
                    updateButtonImage();
                }

                @Override
                public void onFacebookError(FacebookError e) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "onFacebookError", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onError(DialogError e) {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "onError", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onCancel() {
                    // TODO Auto-generated method stub
                    Toast.makeText(MainActivity.this, "onCancel", Toast.LENGTH_SHORT).show();
                }

            });
        }
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        fb.authorizeCallback(requestCode, resultCode, data);
    }
}

I hope, you will get some help with this.