我在应用程序中将twitter集成到登录和推文时面临很大问题 我无法获得access_token，我用Google搜索了很长时间，我现在很沮丧
Logcat向我显示此行中的错误
e.putString(PREF_KEY_OAUTH_TOKEN, accessToken.getToken());
从twitter重定向时
注意：我使用的是twitter4j-core-3.0.5.jar，我按照的教程是twitter4j-core-3.0.3.jar
我希望你能帮助我，因为我真的遇到麻烦了
这是我的代码： -
package com.engahmedphp.successquotes;
import java.io.File;
import twitter4j.Twitter;
import twitter4j.TwitterFactory;
import twitter4j.User;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;
import twitter4j.conf.Configuration;
import twitter4j.conf.ConfigurationBuilder;
import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.PendingIntent;
import android.app.ProgressDialog;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.Preference.OnPreferenceClickListener;
import android.util.Log;
import android.widget.TimePicker;
import android.widget.Toast;
public class SettingsActivity extends PreferenceActivity {
private int hour;
private int minute;
static final int TIME_DIALOG_ID = 999;
static String TWITTER_CONSUMER_KEY = "9b5e5CKWI3SbSJ4HoVnsMA";
static String TWITTER_CONSUMER_SECRET = "igj0dTYlPVygRddnklhvluOtiA7W8HySCjOsyq6Vo";
// 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 = "oauth://com.engahmedphp.successquotes.SettingsActivity";
// 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";
// Progress dialog
ProgressDialog pDialog;
// Twitter
private static Twitter twitter;
private static RequestToken requestToken;
private AccessToken accessToken;
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);
addPreferencesFromResource(R.layout.settings);
setTitle("Settings");
final SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
cd = new ConnectionDetector(getApplicationContext());
// Check if Internet present
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(SettingsActivity.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(SettingsActivity.this, "Twitter oAuth tokens",
"Please set your twitter oauth tokens first!", false);
// stop executing code by return
return;
}
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences("MyPref", 0);
Preference notify_me = (Preference) findPreference("notify_me");
final Preference time = (Preference) findPreference("time");
Preference background = (Preference) findPreference("background");
Preference facebook = (Preference) findPreference("facebook_login");
Preference twitter_login = (Preference) findPreference("twitter_login");
Preference twitter_logout = (Preference) findPreference("twitter_logout");
Preference about = (Preference) findPreference("about");
boolean notify_me_value = sharedPrefs.getBoolean("notify_me", true);
boolean background_value = sharedPrefs.getBoolean("background", false);
// ==============================================================================
time.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
showDialog(TIME_DIALOG_ID);
return true;
}
});
twitter_login.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
loginToTwitter();
return false;
}
});
twitter_logout.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
return true;
}
});
if (!isTwitterLoggedInAlready()) {
Uri uri = getIntent().getData();
if (uri != null && uri.toString().startsWith(TWITTER_CALLBACK_URL)) {
// oAuth verifier
final String verifier = uri.getQueryParameter(URL_TWITTER_OAUTH_VERIFIER);
try {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
// Get the access token
SettingsActivity.this.accessToken = twitter.getOAuthAccessToken(requestToken, verifier);
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
// 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);
// 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());
e.printStackTrace();
}
}
}
}
// ==============================================================================
/**
* 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();
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
SettingsActivity.this.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(requestToken
.getAuthenticationURL())));
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
} else {
// user already logged into twitter
Toast.makeText(getApplicationContext(), "Already Logged into twitter", Toast.LENGTH_LONG).show();
}
}
// ==============================================================================
/**
* 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);
}
// ==============================================================================
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case TIME_DIALOG_ID:
// set time picker as current time
return new TimePickerDialog(this, timePickerListener, hour, minute, false);
}
return null;
}
// ==============================================================================
private TimePickerDialog.OnTimeSetListener timePickerListener = new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int selectedHour, int selectedMinute) {
hour = selectedHour;
minute = selectedMinute;
}
};
// ==============================================================================
@Override
protected void onPause() {
super.onPause();
}
// ==============================================================================
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
}
}
logcat的
11-24 07:28:05.230: E/Twitter Login Error(2068): > null
11-24 07:28:05.249: W/System.err(2068): java.lang.NullPointerException
11-24 07:28:05.249: W/System.err(2068): at com.engahmedphp.successquotes.SettingsActivity.onCreate(SettingsActivity.java:172)
11-24 07:28:05.269: W/System.err(2068): at android.app.Activity.performCreate(Activity.java:5133)
11-24 07:28:05.269: W/System.err(2068): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-24 07:28:05.279: W/System.err(2068): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-24 07:28:05.289: W/System.err(2068): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-24 07:28:05.299: W/System.err(2068): at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-24 07:28:05.299: W/System.err(2068): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-24 07:28:05.319: W/System.err(2068): at android.os.Handler.dispatchMessage(Handler.java:99)
11-24 07:28:05.319: W/System.err(2068): at android.os.Looper.loop(Looper.java:137)
11-24 07:28:05.363: W/System.err(2068): at android.app.ActivityThread.main(ActivityThread.java:5103)
11-24 07:28:05.363: W/System.err(2068): at java.lang.reflect.Method.invokeNative(Native Method)
11-24 07:28:05.363: W/System.err(2068): at java.lang.reflect.Method.invoke(Method.java:525)
11-24 07:28:05.382: W/System.err(2068): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-24 07:28:05.389: W/System.err(2068): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-24 07:28:05.389: W/System.err(2068): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
我终于明白了。我移动这段代码：
// 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);
// 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();
在线程中就像那样
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
requestToken = twitter.getOAuthRequestToken(TWITTER_CALLBACK_URL);
SettingsActivity.this.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(requestToken
.getAuthenticationURL())));
// 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);
// 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();
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();