Question

我正确使用了所有代码，我的Twitter连接Android应用程序工作正常。但当它显示登录按钮时，我多次点击此按钮但没有任何反应。它加载并再次回到同一页面。请帮帮我们！提前致谢..！！我的Main.java类给出如下：

 public class Main extends Activity {
        // Constants
        /**
         * Register your here app https://dev.twitter.com/apps/new and get your
         * consumer key and secret
         * */
        static String TWITTER_CONSUMER_KEY = "";
        static String TWITTER_CONSUMER_SECRET = "";

        // Preference Constants
        static String PREFERENCE_NAME = "twitter_oauth";
        static final String PREF_KEY_OAUTH_TOKEN = "oauth_token";
        static final String PREF_KEY_OAUTH_SECRET = "oauth_token_secret";
        static final String PREF_KEY_TWITTER_LOGIN = "isTwitterLogedIn";

        static final String TWITTER_CALLBACK_URL = " OAuthTwitter://myTweet";

        // Twitter oauth urls
        static final String URL_TWITTER_AUTH = "auth_url";
        static final String URL_TWITTER_OAUTH_VERIFIER = "oauth_verifier";
        static final String URL_TWITTER_OAUTH_TOKEN = "oauth_token";

        // Login button
        Button btnLoginTwitter;
        // Update status button
        Button btnUpdateStatus;
        // Logout button
        Button btnLogoutTwitter;
        // EditText for update
        EditText txtUpdate;
        // lbl update
        TextView lblUpdate;
        TextView lblUserName;

        // Progress dialog
        ProgressDialog pDialog;

        // Twitter
        private static Twitter twitter;
        private static RequestToken requestToken;

        // Shared Preferences
        private static SharedPreferences mSharedPreferences;

        // Internet Connection detector
        private ConnectionDetector cd;

        // Alert Dialog Manager
        AlertDialogManager alert = new AlertDialogManager();

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

            cd = new ConnectionDetector(getApplicationContext());

            // Check if Internet present
            if (!cd.isConnectingToInternet()) {
                // Internet Connection is not present
                alert.showAlertDialog(Main.this, "Internet Connection Error",
                        "Please connect to working Internet connection", false);
                // stop executing code by return
                return;
            }

            // Check if twitter keys are set
            if(TWITTER_CONSUMER_KEY.trim().length() == 0 || TWITTER_CONSUMER_SECRET.trim().length() == 0){
                // Internet Connection is not present
                alert.showAlertDialog(Main.this, "Twitter oAuth tokens", "Please set your twitter oauth tokens first!", false);
                // stop executing code by return
                return;
            }

            // All UI elements
            btnLoginTwitter = (Button) findViewById(R.id.btnLoginTwitter);
            btnUpdateStatus = (Button) findViewById(R.id.btnUpdateStatus);
            btnLogoutTwitter = (Button) findViewById(R.id.btnLogoutTwitter);
            txtUpdate = (EditText) findViewById(R.id.txtUpdateStatus);
            lblUpdate = (TextView) findViewById(R.id.lblUpdate);
            lblUserName = (TextView) findViewById(R.id.lblUserName);

            // Shared Preferences
            mSharedPreferences = getApplicationContext().getSharedPreferences(
                    "MyPref", 0);

            /**
             * Twitter login button click event will call loginToTwitter() function
             * */
            btnLoginTwitter.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View arg0) {
                    // Call login twitter function
                    loginToTwitter();
                }
            });

            /**
             * Button click event to Update Status, will call updateTwitterStatus()
             * function
             * */
            btnUpdateStatus.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    // Call update status function
                    // Get the status from EditText
                    String status = txtUpdate.getText().toString();

                    // Check for blank text
                    if (status.trim().length() > 0) {
                        // update status
                        new updateTwitterStatus().execute(status);
                    } else {
                        // EditText is empty
                        Toast.makeText(getApplicationContext(),
                                "Please enter status message", Toast.LENGTH_SHORT)
                                .show();
                    }
                }
            });

            /**
             * Button click event for logout from twitter
             * */
            btnLogoutTwitter.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View arg0) {
                    // Call logout twitter function
                    logoutFromTwitter();
                }
            });

            /** This if conditions is tested once is
             * redirected from twitter page. Parse the uri to get oAuth
             * Verifier
             * */
            if (!isTwitterLoggedInAlready()) {
                Uri uri = getIntent().getData();
                if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
                    // oAuth verifier
                    String verifier = uri
                            .getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);

                    try {
                        // Get the access token
                        AccessToken accessToken = twitter.getOAuthAccessToken(
                                requestToken, verifier);

                        // Shared Preferences
                        Editor e = mSharedPreferences.edit();

                        // After getting access token, access token secret
                        // store them in application preferences
                        e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
                        e.putString(PREF_KEY_OAUTH_SECRET,
                                accessToken.getTokenSecret());
                        // Store login status - true
                        e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
                        e.commit(); // save changes

                        Log.e("Twitter OAuth Token", "> " + accessToken.getToken());

                        // Hide login button
                        btnLoginTwitter.setVisibility(View.GONE);

                        // Show Update Twitter
                        lblUpdate.setVisibility(View.VISIBLE);
                        txtUpdate.setVisibility(View.VISIBLE);
                        btnUpdateStatus.setVisibility(View.VISIBLE);
                        btnLogoutTwitter.setVisibility(View.VISIBLE);

                        // Getting user details from twitter
                        // For now i am getting his name only
                        long userID = accessToken.getUserId();
                        User user = twitter.showUser(userID);
                        String username = user.getName();

                        // Displaying in xml ui
                        lblUserName.setText(Html.fromHtml("<b>Welcome " + username + "</b>"));
                    } catch (Exception e) {
                        // Check log for login errors
                        Log.e("Twitter Login Error", "> " + e.getMessage());
                    }
                }
            }

        }

        /**
         * Function to login twitter
         * */
        private void loginToTwitter() {
            // Check if already logged in
            if (!isTwitterLoggedInAlready()) {
                ConfigurationBuilder builder = new ConfigurationBuilder();
                builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
                builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);
                Configuration configuration = builder.build();

                TwitterFactory factory = new TwitterFactory(configuration);
                twitter = factory.getInstance();

                try {
                    requestToken = twitter
                            .getOAuthRequestToken(TWITTER_CALLBACK_URL);
                    this.startActivity(new Intent(Intent.ACTION_VIEW, Uri
                            .parse(requestToken.getAuthenticationURL())));
                } catch (TwitterException e) {
                    e.printStackTrace();
                }
            } else {
                // user already logged into twitter
                Toast.makeText(getApplicationContext(),
                        "Already Logged into twitter", Toast.LENGTH_LONG).show();
            }
        }

        /**
         * Function to update status
         * */
        class updateTwitterStatus extends AsyncTask<String, String, String> {

            /**
             * Before starting background thread Show Progress Dialog
             * */
            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                pDialog = new ProgressDialog(Main.this);
                pDialog.setMessage("Updating to twitter...");
                pDialog.setIndeterminate(false);
                pDialog.setCancelable(false);
                pDialog.show();
            }

            /**
             * getting Places JSON
             * */
            protected String doInBackground(String... args) {
                Log.d("Tweet Text", "> " + args[0]);
                String status = args[0];
                try {
                    ConfigurationBuilder builder = new ConfigurationBuilder();
                    builder.setOAuthConsumerKey(TWITTER_CONSUMER_KEY);
                    builder.setOAuthConsumerSecret(TWITTER_CONSUMER_SECRET);

                    // Access Token 
                    String access_token = mSharedPreferences.getString(PREF_KEY_OAUTH_TOKEN, "");
                    // Access Token Secret
                    String access_token_secret = mSharedPreferences.getString(PREF_KEY_OAUTH_SECRET, "");

                    AccessToken accessToken = new AccessToken(access_token, access_token_secret);
                    Twitter twitter = new TwitterFactory(builder.build()).getInstance(accessToken);

                    // Update status
                    twitter4j.Status response = twitter.updateStatus(status);

                    Log.d("Status", "> " + response.getText());
                } catch (TwitterException e) {
                    // Error in updating status
                    Log.d("Twitter Update Error", e.getMessage());
                }
                return null;
            }

            /**
             * After completing background task Dismiss the progress dialog and show
             * the data in UI Always use runOnUiThread(new Runnable()) to update UI
             * from background thread, otherwise you will get error
             * **/
            protected void onPostExecute(String file_url) {
                // dismiss the dialog after getting all products
                pDialog.dismiss();
                // updating UI from Background Thread
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(getApplicationContext(),
                                "Status tweeted successfully", Toast.LENGTH_SHORT)
                                .show();
                        // Clearing EditText field
                        txtUpdate.setText("");
                    }
                });
            }

        }

        /**
         * Function to logout from twitter
         * It will just clear the application shared preferences
         * */
        private void logoutFromTwitter() {
            // Clear the shared preferences
            Editor e = mSharedPreferences.edit();
            e.remove(PREF_KEY_OAUTH_TOKEN);
            e.remove(PREF_KEY_OAUTH_SECRET);
            e.remove(PREF_KEY_TWITTER_LOGIN);
            e.commit();

            // After this take the appropriate action
            // I am showing the hiding/showing buttons again
            // You might not needed this code
            btnLogoutTwitter.setVisibility(View.GONE);
            btnUpdateStatus.setVisibility(View.GONE);
            txtUpdate.setVisibility(View.GONE);
            lblUpdate.setVisibility(View.GONE);
            lblUserName.setText("");
            lblUserName.setVisibility(View.GONE);

            btnLoginTwitter.setVisibility(View.VISIBLE);
        }

        /**
         * Check user already logged in your application using twitter Login flag is
         * fetched from Shared Preferences
         * */
        private boolean isTwitterLoggedInAlready() {
            // return twitter login status from Shared Preferences
            return mSharedPreferences.getBoolean(PREF_KEY_TWITTER_LOGIN, false);
        }

        protected void onResume() {
            super.onResume();
        }

下面给出的图像。

enter image description here

Answer 1

检查您的DDMS，您的应用中应该有android.os.NetworkOnMainThreadException例外。这是因为requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);在主UI线程上发出了http请求。您应该实现AsyncTask类来处理请求。

AsyncTask类DOC：http://developer.android.com/reference/android/os/AsyncTask.html

Answer 2

Alvin，你在错误的地方处理Twitter回调。回调代码不应该在您的活动的onCreate(Bundle)方法中。假设你已经按照这样的教程......

http://blog.blundell-apps.com/sending-a-tweet/

...如果您在应用清单中添加了一个用于捕获回调的Main活动的intent-filter，则回调代码应该在您的活动的onNewIntent(Intent)方法中。

希望有所帮助！

Android应用未登录Twitter

2 个答案: