Twitter for Android を使って OAuth 認証できるっぽいので

MainActivity.java

package jp.rhe.test.twitterauth;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

public class MainActivity extends Activity {
    private final int REQUEST_CODE = 280414022;
    private static final ComponentName AUTH_ACTIVITY = new ComponentName("com.twitter.android", "com.twitter.android.AuthorizeAppActivity");

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

        findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent localIntent = new Intent().setComponent(AUTH_ACTIVITY);
                localIntent.putExtra("ck", "IQKbtAYlXLripLGPWd0HUA");
                localIntent.putExtra("cs", "GgDYlkSvaPxGxC4X8liwpUoqKwwr3lCADbz8A7ADU");
                startActivityForResult(localIntent, REQUEST_CODE);
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        
        if (requestCode == REQUEST_CODE && data != null) {
            // requestCode == REQUEST_CODE && data == null は Cancel？
            Bundle extras = data.getExtras();
            ((TextView) findViewById(R.id.textView1)).setText("Access Token: " + extras.getString("tk"));
            ((TextView) findViewById(R.id.textView2)).setText("Access Token Secret: " + extras.getString("ts"));
            ((TextView) findViewById(R.id.textView3)).setText("Screen Name: " + extras.getString("screen_name"));
            ((TextView) findViewById(R.id.textView4)).setText("User ID: " + extras.getLong("user_id"));
        }
    }
}