AndroidアプリでNetworkOnMainThreadExceptionを避けつつTwitter4Jを使用したアプリ連携を行う #Twitter4J ref: http://qiita.com/rsato/items/39efd16c8a77a893a67e

auth1.java

// 準備
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(consumerKey, consumerSecret);
twitter.setOAuthAccessToken(null);
RequestToken requestToken = twitter.getOAuthRequestToken(); // ここで通信
// このURLでブラウザで認証
String url = requestToken.getAuthorizationURL();

auth2.java

// PIN入力
AccessToken accessToken = twitter.getOAuthAccessToken(pin); // ここでも通信
// トークンの取得
String token = accessToken.getToken();
String tokenSecret = accessToken.getTokenSecret();

do-auth.java

TwitterOAuthRequestTokenCallbacks oAuthRequestTokenCallbacks = new TwitterOAuthRequestTokenCallbacks(this, mTwitter);
getLoaderManager().initLoader(0, null, oAuthRequestTokenCallbacks);

file0.java

// 準備
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(consumerKey, consumerSecret);
twitter.setOAuthAccessToken(null);
RequestToken requestToken = twitter.getOAuthRequestToken(); // ここで通信
// このURLでブラウザで認証
String url = requestToken.getAuthorizationURL();

file1.java

// PIN入力
AccessToken accessToken = twitter.getOAuthAccessToken(pin); // ここでも通信
// トークンの取得。これらを保管しておく。
String token = accessToken.getToken();
String tokenSecret = accessToken.getTokenSecret();

file2.java

public class TwitterOAuthRequestTokenLoader extends AsyncTaskLoader<RequestToken> {

    private Twitter mTwitter;

    public TwitterOAuthRequestTokenLoader(Context context, Twitter twitter) {
        super(context);
        mTwitter = twitter;
    }

    @Override
    public RequestToken loadInBackground() {
        RequestToken requestToken = null;
       try {
            requestToken = mTwitter.getOAuthRequestToken();
        } catch (TwitterException e) {
            requestToken = null;
        }
        return requestToken;
    }
}

file3.java

public class TwitterOAuthRequestTokenCallbacks implements LoaderCallbacks<RequestToken> {

    private Context mContext;
    private Twitter mTwitter;

    public TwitterOAuthRequestTokenCallbacks(Context context, Twitter twitter) {
        mContext = context;
        mTwitter = twitter;
    }

    @Override
    public Loader<RequestToken> onCreateLoader(int id, Bundle args) {
        Loader<RequestToken> loader = new TwitterOAuthRequestTokenLoader(mContext, mTwitter);
        loader.startLoading();
        return loader;
    }

    @Override
    public void onLoadFinished(Loader<RequestToken> arg0, RequestToken requestToken) {
        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(requestToken.getAuthorizationURL()));
        mContext.startActivity(intent);
    }
}

file4.java

mTwitter = new TwitterFactory().getInstance();
mTwitter.setOAuthConsumer(KEY), KEY_SECRET);
mTwitter.setOAuthAccessToken(null);

file5.java

LoaderManager.LoaderCallbacks<RequestToken> requestTokenCallbacks = new TwitterOAuthRequestTokenCallbacks(this, mTwitter);
getSupportLoaderManager().initLoader(0, null, requestTokenCallbacks);

twitter-prepare.java

mTwitter = new TwitterFactory().getInstance();
mTwitter.setOAuthConsumer(getString(R.string.twitter_consumer_key), getString(R.string.twitter_consumer_key_secret));
mTwitter.setOAuthAccessToken(null);

TwitterOAuthRequestTokenCallbacks.java

public class TwitterOAuthRequestTokenCallbacks implements LoaderCallbacks<RequestToken> {

    private Context mContext;
    private Twitter mTwitter;

    public TwitterOAuthRequestTokenCallbacks(Context context, Twitter twitter) {
        mContext = context;
        mTwitter = twitter;
    }

    @Override
    public Loader<RequestToken> onCreateLoader(int id, Bundle args) {
        TwitterOAuthRequestTokenLoader loader = new TwitterOAuthRequestTokenLoader(mContext, mTwitter);
        loader.forceLoad();
        return loader;
    }

    @Override
    public void onLoadFinished(Loader<RequestToken> arg0, RequestToken requestToken) {
        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(requestToken.getAuthorizationURL()));
        mContext.startActivity(intent);
    }
}

TwitterOAuthRequestTokenLoader.java

public class TwitterOAuthRequestTokenLoader extends AsyncTaskLoader<RequestToken> {

    private Twitter mTwitter;

    public TwitterOAuthRequestTokenLoader(Context context, Twitter twitter) {
        super(context);
        mTwitter = twitter;
    }

    @Override
    public RequestToken loadInBackground() {
        RequestToken requestToken = null;
       try {
            requestToken = mTwitter.getOAuthRequestToken();
        } catch (TwitterException e) {
            requestToken = null;
        }
        return requestToken;
    }
}