我在我的Android应用程序中使用twitter api在我的帐户上发布应用推文 但是在从twitterb重定向后获取访问令牌时，我无法识别出一些错误。
我希望你能帮助我
这是我的代码
if (!isTwitterLoggedInAlready()) {
Toast.makeText(QuoteDialogActivity.this, "token get", Toast.LENGTH_SHORT).show();
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
QuoteDialogActivity.this.accessToken = twitter.getOAuthAccessToken(
requestToken,verifier);
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
// Shared Preferences
Editor e = mPrefs.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.getToken());
// Store login status - true
e.putBoolean(PREF_KEY_TWITTER_LOGIN, true);
e.commit(); // save changes
Log.e("Twitter OAuth Token", "> " + accessToken.getToken());
// 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();
}
}
}
=============================================== ===
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);
QuoteDialogActivity.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();
}
}
private boolean isTwitterLoggedInAlready() {
// return twitter login status from Shared Preferences
return mPrefs.getBoolean(PREF_KEY_TWITTER_LOGIN, false);
}
=============================================== =====
logcat的
11-24 10:32:29.104: E/Twitter Login Error(3867): > null
11-24 10:32:29.104: W/System.err(3867): java.lang.NullPointerException
11-24 10:32:29.104: W/System.err(3867): at com.engahmedphp.successquotes.MainActivity.onCreate(MainActivity.java:143)
11-24 10:32:29.104: W/System.err(3867): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-24 10:32:29.104: W/System.err(3867): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2633)
11-24 10:32:29.104: W/System.err(3867): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2685)
11-24 10:32:29.104: W/System.err(3867): at android.app.ActivityThread.access$2300(ActivityThread.java:126)
11-24 10:32:29.104: W/System.err(3867): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2038)
11-24 10:32:29.104: W/System.err(3867): at android.os.Handler.dispatchMessage(Handler.java:99)
11-24 10:32:29.104: W/System.err(3867): at android.os.Looper.loop(Looper.java:123)
11-24 10:32:29.114: W/System.err(3867): at android.app.ActivityThread.main(ActivityThread.java:4633)
11-24 10:32:29.114: W/System.err(3867): at java.lang.reflect.Method.invokeNative(Native Method)
11-24 10:32:29.114: W/System.err(3867): at java.lang.reflect.Method.invoke(Method.java:521)
11-24 10:32:29.114: W/System.err(3867): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
11-24 10:32:29.114: W/System.err(3867): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
11-24 10:32:29.114: W/System.err(3867): at dalvik.system.NativeStart.main(Native Method)
11-24 10:32:29.114: W/System.err(3867): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
11-24 10:32:29.114: W/System.err(3867): at android.os.Handler.<init>(Handler.java:121)
11-24 10:32:29.114: W/System.err(3867): at android.widget.Toast.<init>(Toast.java:68)
11-24 10:32:29.114: W/System.err(3867): at android.widget.Toast.makeText(Toast.java:231)
11-24 10:32:29.114: W/System.err(3867): at com.engahmedphp.successquotes.MainActivity$5.run(MainActivity.java:126)
11-24 10:32:29.114: W/System.err(3867): at java.lang.Thread.run(Thread.java:1096)