Log in with twitter4j callback

Question

I try to write an application where an user can log in on twitter. I use twitter4j like library.My problem is that when I go in the page where I must put username and passwo

Answer 1

Twitter login in 4 easy steps:

1- Add intent-filter for your activity (Based on @rennoDeniro response) AndroidManifest.xml

2- Define twitter key and secret in strings.xml

XXX
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3- Request twitter for signup page in MainActivity.java

public String CALLBACK_URL="myapp://twitter";
public Twitter twitter;
private static RequestToken rToken;


public void onLoginTwitter(View v) {
    (new RequestTwitterLoginTask()).execute();
}

class RequestTwitterLoginTask extends AsyncTask {

    @Override
    protected String doInBackground(Void... params) {
        twitter = new TwitterFactory().getInstance();
        try
        {
            twitter.setOAuthConsumer(R.string.twitter_consumerKey, R.string.twitter_consumerSecret);
            String callbackURL = CALLBACK_URL;
            rToken= twitter.getOAuthRequestToken(callbackURL);

        }
        catch(Exception e)
        {
               Toast.makeText(getApplicationContext(), "Exception: " + e.toString(),Toast.LENGTH_SHORT).show();
            e.printStackTrace();
        }            

        return null;
    }


    @Override
    protected void onPostExecute(String s) {
        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(rToken.getAuthenticationURL())));
    }
}    

4- Handle Callback in MainActivity.java

public void onResume(){
    super.onResume();

    if (this.getIntent()!=null && this.getIntent().getData()!=null){
        Uri uri = this.getIntent().getData();

        //handle returning from authenticating the user
        if (uri != null && uri.toString().startsWith(CALLBACK_URL)) {
            String token = uri.getQueryParameter("oauth_token");
            String verifier = uri.getQueryParameter("oauth_verifier");

            try {
                Twitter t = new TwitterFactory().getInstance();
                t.setOAuthConsumer(getResources().getString(R.string.twitter_consumerKey), getResources().getString(R.string.twitter_consumerSecret));

                AccessToken accessToken = t.getOAuthAccessToken(rToken,verifier);

                long userID = accessToken.getUserId();
                User user = t.showUser(userID);

                /* Do whatever you want */
            } catch (TwitterException e) {
                Toast.makeText(getApplicationContext(), "Twitter Exception: " + e.toString(),Toast.LENGTH_SHORT).show();
                e.printStackTrace();
            }

            return;
        }
    }    

    Toast.makeText(getApplicationContext(), "Resume",Toast.LENGTH_SHORT).show();

}