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  1. POTwitter4J in android app don't work:TwitterException: 401
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    <p>I've got a problem while integrating twitter in my android application while using twitter4j: </p> <p>This is my code: ------- do auth</p> <pre><code>public void doOauth(){ try { String authURL = provider.retrieveRequestToken(consumer, CALLBACK_URL); Log.i("OAuthTwitter", authURL); startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(authURL))); webview.getSettings().setJavaScriptEnabled(true); webview.loadUrl(authURL); } catch (OAuthMessageSignerException e) { e.printStackTrace(); } catch (OAuthNotAuthorizedException e) { e.printStackTrace(); } catch (OAuthExpectationFailedException e) { e.printStackTrace(); } catch (OAuthCommunicationException e) { e.printStackTrace(); } } </code></pre> <p>---- on new intent</p> <pre><code> @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); Uri uri = intent.getData(); Log.i(TAG, "uri = "+uri); if (uri != null &amp;&amp; uri.toString().startsWith(CALLBACK_URL)) { Log.i("OAuthTwitter : url", uri.toString()); String verifier = uri.getQueryParameter(OAuth.OAUTH_VERIFIER); Log.i("OAuthTwitter : verify", verifier); AccessToken a = new AccessToken(consumer.getToken(), consumer.getTokenSecret()); Log.i(TAG, "comsumer.toker = "+consumer.getToken() ); Log.i(TAG, "comsumer.tokersecret = "+consumer.getTokenSecret() ); // initialize Twitter4J twitter = new TwitterFactory().getInstance(); twitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET); twitter.setOAuthAccessToken(a); // create a tweet Date d = new Date(System.currentTimeMillis()); String tweet = "#OAuth working! " + d.toLocaleString(); // send the tweet try { twitter.updateStatus(tweet); Log.i(TAG, "sucess !!!!"); } catch (TwitterException e) { // TODO Auto-generated catch block e.printStackTrace(); } // feedback for the user... Toast.makeText(this, tweet, Toast.LENGTH_LONG).show(); } } </code></pre> <p>Here is the error message: </p> <pre><code>03-03 09:26:34.140: WARN/System.err(4056): twitter4j.TwitterException: 401:Authentication credentials were missing or incorrect. 03-03 09:26:34.140: WARN/System.err(4056): {"request":"\/1\/statuses\/update.json","error":"Request token must be exchanged for an access token before use"} 03-03 09:26:34.140: WARN/System.err(4056): at twitter4j.http.HttpClient.request(HttpClient.java:318) 03-03 09:26:34.140: WARN/System.err(4056): at twitter4j.http.HttpClientWrapper.request(HttpClientWrapper.java:66) 03-03 09:26:34.140: WARN/System.err(4056): at twitter4j.http.HttpClientWrapper.post(HttpClientWrapper.java:97) 03-03 09:26:34.140: WARN/System.err(4056): at twitter4j.Twitter.updateStatus(Twitter.java:428) 03-03 09:26:34.140: WARN/System.err(4056): at com.vortexsolution.evenko.ShareByTwitter.onNewIntent(ShareByTwitter.java:83) 03-03 09:26:34.140: WARN/System.err(4056): at android.app.Instrumentation.callActivityOnNewIntent(Instrumentation.java:1119) 03-03 09:26:34.140: WARN/System.err(4056): at android.app.ActivityThread.deliverNewIntents(ActivityThread.java:2738) 03-03 09:26:34.140: WARN/System.err(4056): at android.app.ActivityThread.performNewIntents(ActivityThread.java:2750) 03-03 09:26:34.140: WARN/System.err(4056): at android.app.ActivityThread.handleNewIntent(ActivityThread.java:2758) 03-03 09:26:34.140: WARN/System.err(4056): at android.app.ActivityThread.access$3100(ActivityThread.java:125) 03-03 09:26:34.140: WARN/System.err(4056): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2080) 03-03 09:26:34.140: WARN/System.err(4056): at android.os.Handler.dispatchMessage(Handler.java:99) 03-03 09:26:34.140: WARN/System.err(4056): at android.os.Looper.loop(Looper.java:123) 03-03 09:26:34.140: WARN/System.err(4056): at android.app.ActivityThread.main(ActivityThread.java:4627) 03-03 09:26:34.144: WARN/System.err(4056): at java.lang.reflect.Method.invokeNative(Native Method) 03-03 09:26:34.144: WARN/System.err(4056): at java.lang.reflect.Method.invoke(Method.java:521) 03-03 09:26:34.144: WARN/System.err(4056): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 03-03 09:26:34.144: WARN/System.err(4056): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 03-03 09:26:34.144: WARN/System.err(4056): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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