我通过集成“httpclient-4.0.1.jar”，“signpost-commonhttp4-1.2.1.1.jar”，“signpost-core-1.2.1.1.jar”，“twitter4j-core”在我的应用程序中集成了twitter -2.1.11.jar“files ..
代码是：
public class AndroidTwitterSample extends Activity {
private SharedPreferences prefs;
private final Handler mTwitterHandler = new Handler();
private TextView loginStatus;
String message="Hii";
final Runnable mUpdateTwitterNotification = new Runnable() {
public void run() {
Toast.makeText(getBaseContext(), "Tweet sent !", Toast.LENGTH_LONG).show();
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.prefs = PreferenceManager.getDefaultSharedPreferences(this);
loginStatus = (TextView)findViewById(R.id.login_status);
Button tweet = (Button) findViewById(R.id.btn_tweet);
Button clearCredentials = (Button) findViewById(R.id.btn_clear_credentials);
tweet.setOnClickListener(new View.OnClickListener() {
/**
* Send a tweet. If the user hasn't authenticated to Tweeter yet, he'll be redirected via a browser
* to the twitter login page. Once the user authenticated, he'll authorize the Android application to send
* tweets on the users behalf.
*/
public void onClick(View v) {
if (TwitterUtils.isAuthenticated(prefs)) {
sendTweet();
} else {
Intent i = new Intent(getApplicationContext(), PrepareRequestTokenActivity.class);
i.putExtra("tweet_msg",getTweetMsg());
startActivity(i);
}
}
});
clearCredentials.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
clearCredentials();
updateLoginStatus();
}
});
}
@Override
protected void onResume() {
super.onResume();
updateLoginStatus();
}
public void updateLoginStatus() {
loginStatus.setText("Logged into Twitter : " + TwitterUtils.isAuthenticated(prefs));
}
private String getTweetMsg() {
return message;
}
public void sendTweet() {
Thread t = new Thread() {
public void run() {
try {
TwitterUtils.sendTweet(prefs,getTweetMsg());
mTwitterHandler.post(mUpdateTwitterNotification);
} catch (Exception ex) {
ex.printStackTrace();
}
}
};
t.start();
}
private void clearCredentials() {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
final Editor edit = prefs.edit();
edit.remove(OAuth.OAUTH_TOKEN);
edit.remove(OAuth.OAUTH_TOKEN_SECRET);
edit.commit();
}
}
Constants类：
public class Constants {
public static final String CONSUMER_KEY = "<key>";
public static final String CONSUMER_SECRET= "<secret>";
public static final String REQUEST_URL = "https://api.twitter.com/oauth/request_token";
public static final String ACCESS_URL = "https://api.twitter.com/oauth/access_token";
public static final String AUTHORIZE_URL = "https://api.twitter.com/oauth/authorize";
public static final String OAUTH_CALLBACK_SCHEME = "x-oauthflow-twitter";
public static final String OAUTH_CALLBACK_HOST = "callback";
public static final String OAUTH_CALLBACK_URL = OAUTH_CALLBACK_SCHEME + "://" + OAUTH_CALLBACK_HOST;
}
OAuthRequestToken类：
public class OAuthRequestTokenTask extends AsyncTask<Void, Void, Void> {
final String TAG = getClass().getName();
private Context context;
private OAuthProvider provider;
private OAuthConsumer consumer;
/**
*
* We pass the OAuth consumer and provider.
*
* @param context
* Required to be able to start the intent to launch the browser.
* @param provider
* The OAuthProvider object
* @param consumer
* The OAuthConsumer object
*/
public OAuthRequestTokenTask(Context context,OAuthConsumer consumer,OAuthProvider provider) {
this.context = context;
this.consumer = consumer;
this.provider = provider;
}
/**
*
* Retrieve the OAuth Request Token and present a browser to the user to authorize the token.
*
*/
@Override
protected Void doInBackground(Void... params) {
try {
Log.i(TAG, "Retrieving request token from Google servers");
final String url = provider.retrieveRequestToken(consumer, Constants.OAUTH_CALLBACK_URL);
Log.i(TAG, "Popping a browser with the authorize URL : " + url);
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)).setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_FROM_BACKGROUND);
context.startActivity(intent);
} catch (Exception e) {
Log.e(TAG, "Error during OAUth retrieve request token", e);
}
return null;
}
}
PrepareRequestTokenActivity：
public class PrepareRequestTokenActivity extends Activity {
final String TAG = getClass().getName();
private OAuthConsumer consumer;
private OAuthProvider provider;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
this.consumer = new CommonsHttpOAuthConsumer(Constants.CONSUMER_KEY, Constants.CONSUMER_SECRET);
this.provider = new CommonsHttpOAuthProvider(Constants.REQUEST_URL,Constants.ACCESS_URL,Constants.AUTHORIZE_URL);
} catch (Exception e) {
Log.e(TAG, "Error creating consumer / provider",e);
}
Log.i(TAG, "Starting task to retrieve request token.");
new OAuthRequestTokenTask(this,consumer,provider).execute();
}
/**
* Called when the OAuthRequestTokenTask finishes (user has authorized the request token).
* The callback URL will be intercepted here.
*/
@Override
public void onNewIntent(Intent intent) {
super.onNewIntent(intent);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
final Uri uri = intent.getData();
if (uri != null && uri.getScheme().equals(Constants.OAUTH_CALLBACK_SCHEME)) {
Log.i(TAG, "Callback received : " + uri);
Log.i(TAG, "Retrieving Access Token");
new RetrieveAccessTokenTask(this,consumer,provider,prefs).execute(uri);
finish();
}
}
public class RetrieveAccessTokenTask extends AsyncTask<Uri, Void, Void> {
private Context context;
private OAuthProvider provider;
private OAuthConsumer consumer;
private SharedPreferences prefs;
public RetrieveAccessTokenTask(Context context, OAuthConsumer consumer,OAuthProvider provider, SharedPreferences prefs) {
this.context = context;
this.consumer = consumer;
this.provider = provider;
this.prefs=prefs;
}
/**
* Retrieve the oauth_verifier, and store the oauth and oauth_token_secret
* for future API calls.
*/
@Override
protected Void doInBackground(Uri...params) {
final Uri uri = params[0];
final String oauth_verifier = uri.getQueryParameter(OAuth.OAUTH_VERIFIER);
try {
provider.retrieveAccessToken(consumer, oauth_verifier);
final Editor edit = prefs.edit();
edit.putString(OAuth.OAUTH_TOKEN, consumer.getToken());
edit.putString(OAuth.OAUTH_TOKEN_SECRET, consumer.getTokenSecret());
edit.commit();
String token = prefs.getString(OAuth.OAUTH_TOKEN, "");
String secret = prefs.getString(OAuth.OAUTH_TOKEN_SECRET, "");
consumer.setTokenWithSecret(token, secret);
context.startActivity(new Intent(context,AndroidTwitterSample.class));
executeAfterAccessTokenRetrieval();
Log.i(TAG, "OAuth - Access Token Retrieved");
} catch (Exception e) {
Log.e(TAG, "OAuth - Access Token Retrieval Error", e);
}
return null;
}
private void executeAfterAccessTokenRetrieval() {
String msg = getIntent().getExtras().getString("tweet_msg");
try {
TwitterUtils.sendTweet(prefs, msg);
} catch (Exception e) {
Log.e(TAG, "OAuth - Error sending to Twitter", e);
}
}
}
}
TwitterUtils：
public class TwitterUtils {
public static boolean isAuthenticated(SharedPreferences prefs) {
String token = prefs.getString(OAuth.OAUTH_TOKEN, "");
String secret = prefs.getString(OAuth.OAUTH_TOKEN_SECRET, "");
AccessToken a = new AccessToken(token,secret);
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(Constants.CONSUMER_KEY, Constants.CONSUMER_SECRET);
twitter.setOAuthAccessToken(a);
try {
twitter.getAccountSettings();
return true;
} catch (TwitterException e) {
return false;
}
}
public static void sendTweet(SharedPreferences prefs,String msg) throws Exception {
String token = prefs.getString(OAuth.OAUTH_TOKEN, "");
String secret = prefs.getString(OAuth.OAUTH_TOKEN_SECRET, "");
AccessToken a = new AccessToken(token,secret);
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(Constants.CONSUMER_KEY, Constants.CONSUMER_SECRET);
twitter.setOAuthAccessToken(a);
twitter.updateStatus(msg);
}
}
问题出在2条推文之后，它给了我一个例外：
W/System.err(5104): 403:The request is understood, but it has been refused. An accompanying error message will explain why. This code is used when requests are being denied due to update limits (http://support.twitter.com/forums/10711/entries/15364).
W/System.err(5104): error - Status is a duplicate.
W/System.err(5104): request - /1/statuses/update.json
W/System.err(5104): Relevant discussions can be on the Internet at:
W/System.err(5104): http://www.google.co.jp/search?q=15bb6564 or
W/System.err(5104): http://www.google.co.jp/search?q=010f3e5b
W/System.err(5104): TwitterException{exceptionCode=[15bb6564-010f3e5b], statusCode=403, retryAfter=0, rateLimitStatus=null, version=2.1.11}
W/System.err(5104): at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:199)
W/System.err(5104): at twitter4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:75)
W/System.err(5104): at twitter4j.internal.http.HttpClientWrapper.post(HttpClientWrapper.java:112)
W/System.err(5104): at twitter4j.Twitter.updateStatus(Twitter.java:593)
W/System.err(5104): at com.ecs.android.sample.twitter.TwitterUtils.sendTweet(TwitterUtils.java:38)
W/System.err(5104): at com.ecs.android.sample.twitter.AndroidTwitterSample$4.run(AndroidTwitterSample.java:84)
答案 0 :(得分：10)
从错误消息中：
error - Status is a duplicate.
这意味着您不能两次发送相同的消息。
如果您发送了推文HI，那么您cannot再次发推文（至少在那一天 - 不确定）。您将收到Status is a duplicate错误