import de.umass.lastfm.Authenticator; //导入依赖的package包/类
public boolean startLastFmSession(String lastFmUsername, String lastFmPassword) {
    // Last fm API set up
    Caller lastFmCaller = Caller.getInstance();
    lastFmCaller.setUserAgent(System.getProperties().getProperty("http.agent"));
    lastFmCaller.setDebugMode(true);
    lastFmCaller.setCache(new MemoryCache());

    try {
        mLastFmSession = Authenticator.getMobileSession(lastFmUsername, lastFmPassword, API_KEY, API_SECRET);
    } catch (Exception e) {
        Log.e(TAG, "Error while getting last.fm session", e);
        return false;
    }

    return mLastFmSession != null;
}
 

import de.umass.lastfm.Authenticator; //导入依赖的package包/类
public void requestAuthorize(String user, String pwd, Context c) throws ServiceCommException{
	
	try{
		session = Authenticator.getMobileSession(user, pwd, key, secret);			
	}catch(RuntimeException e){
		throw new ServiceCommException(ServiceID.LASTFM, ServiceErr.IO);			
	}
	
	if(session == null)
		throw new ServiceCommException(ServiceID.LASTFM, ServiceErr.NOT_AUTH);
	
	Editor editor = PreferenceManager.getDefaultSharedPreferences(c).edit();
	editor.putString(PREF_SESSIONKEY, session.getKey());
	editor.putString(PREF_USERNAME, session.getUsername());
	editor.commit();		
}
 

import de.umass.lastfm.Authenticator; //导入依赖的package包/类
public void getSession(final String username, final String password, final LastfmWaiter loginWaiter) {
    AsyncTask t = new AsyncTask() {
        @Override
        protected Object doInBackground(Object[] objects) {
            try {
                mSession = Authenticator.getMobileSession(username, password, API_KEY, API_SECRET);
                if (mSession != null) {
                    mAccessKey = mSession.getKey();
                    mUserName = mSession.getUsername();
                    saveSession();
                    return true;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return false;
        }

        @Override
        protected void onPostExecute(Object o) {
            loginWaiter.onResult((Boolean)o);
        }
    };
    t.execute();
}
 

import de.umass.lastfm.Authenticator; //导入依赖的package包/类
/**
 * @see Authenticator#getSession(String, String, String)
 */
public Session getSession(String token, String apiKey, String secret) {
  return Authenticator.getSession(token, apiKey, secret);
}
 

import de.umass.lastfm.Authenticator; //导入依赖的package包/类
private void updateScrobbling() {
	if(musicPlayer.isActive() == false) {
		return;
	}
	if(!preference.getBoolean(getString(R.string.pref_lastfm_scrobbling), false))
		return;

	checkState(musicPlayer.getCurrentTrack() != null);
		
	Thread t = new Thread(new Runnable(){
		Track track = musicPlayer.getCurrentTrack();
		
		public void run() {	
			Session session = null;
			try {
				session = Authenticator.getMobileSession(
						preference.getString(getString(R.string.pref_lastfm_username), ""),
						preference.getString(getString(R.string.pref_lastfm_pwd), ""), 
						lastFM_key, lastFM_secret);
				
			} catch (de.umass.lastfm.CallException ex) {
				LOGGER.warn("de.umass.lastfm.CallException: {}",  ex.getMessage());
			}
			if(session == null)
			{
				//					LOGGER.debug("Could not log in");
				Looper.prepare();
				Toast.makeText(getBaseContext(),SonarflowApplication.getAppContext().getString(R.string.could_not_log_in), Toast.LENGTH_SHORT).show();
				Looper.loop();
				return;
			}
			try {
				Thread.sleep(30000);
			} catch (InterruptedException e1) {
				LOGGER.debug("Could not sleep");
			}

			if(track == musicPlayer.getCurrentTrack() && musicPlayer.isPlaying())
			{
				int now = (int)(System.currentTimeMillis()/1000);
				try{
					ScrobbleResult result = de.umass.lastfm.Track.scrobble(
							track.getArtistName(), track.getName(), now, session);
					if(result.isSuccessful() && !result.isIgnored())
					{
						Looper.prepare();
						Toast.makeText(getBaseContext(),SonarflowApplication.getAppContext().getString(R.string.current_song_scrobbled)  , Toast.LENGTH_SHORT).show();
						Looper.loop();
					}}
				catch(Exception e){
					Looper.prepare();
					LOGGER.error(e.getMessage());
					Toast.makeText(getBaseContext(), SonarflowApplication.getAppContext().getString(R.string.problem_with_scrobbling) , Toast.LENGTH_SHORT).show();
					Looper.loop();
				}
			}
		}
	});
	t.start();
}
 

import de.umass.lastfm.Authenticator; //导入依赖的package包/类
public Session getSession(String username, String password) {
	return Authenticator.getMobileSession(username, password, Auth.KEY, Auth.SECRET);
}