Hey guys i am using twitter4J to post tweet on twitter

Here i Change the Code according to your suggestion . i do some google search. The problem is When i try to shift from main activity to twitter activity it show force close. Main activity is = "MainActivity" twitter activity is = "twiti_backup" I think there is problem in Manifestfile but i dont know what was it.

public class twiti_backup extends Activity {

private static final String TAG = "Blundell.TweetToTwitterActivity";


private static final String PREF_ACCESS_TOKEN = "";

private static final String PREF_ACCESS_TOKEN_SECRET = "";

private static final String CONSUMER_KEY = "";

private static final String CONSUMER_SECRET = ""; 
private static final String CALLBACK_URL = "android:///";

private SharedPreferences mPrefs;

private Twitter mTwitter;

private RequestToken mReqToken;

private Button mLoginButton;
private Button mTweetButton;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.i(TAG, "Loading TweetToTwitterActivity");
    setContentView(R.layout.twite);


    mPrefs = getSharedPreferences("twitterPrefs", MODE_PRIVATE);

    mTwitter = new TwitterFactory().getInstance();

    mTwitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);


    mLoginButton = (Button) findViewById(R.id.login_button);
    mTweetButton = (Button) findViewById(R.id.tweet_button);
}


public void buttonLogin(View v) {
    Log.i(TAG, "Login Pressed");
    if (mPrefs.contains(PREF_ACCESS_TOKEN)) {
        Log.i(TAG, "Repeat User");
        loginAuthorisedUser();
    } else {
        Log.i(TAG, "New User");
        loginNewUser();
    }
}


public void buttonTweet(View v) {
    Log.i(TAG, "Tweet Pressed");
    tweetMessage();
}


private void loginNewUser() {
    try {
        Log.i(TAG, "Request App Authentication");
        mReqToken = mTwitter.getOAuthRequestToken(CALLBACK_URL);

        Log.i(TAG, "Starting Webview to login to twitter");
        WebView twitterSite = new WebView(this);
        twitterSite.loadUrl(mReqToken.getAuthenticationURL());
        setContentView(twitterSite);

    } catch (TwitterException e) {
        Toast.makeText(this, "Twitter Login error, try again later", Toast.LENGTH_SHORT).show();
    }
}


private void loginAuthorisedUser() {
    String token = mPrefs.getString(PREF_ACCESS_TOKEN, null);
    String secret = mPrefs.getString(PREF_ACCESS_TOKEN_SECRET, null);

    // Create the twitter access token from the credentials we got previously
    AccessToken at = new AccessToken(token, secret);

    mTwitter.setOAuthAccessToken(at);

    Toast.makeText(this, "Welcome back", Toast.LENGTH_SHORT).show();

    enableTweetButton();
}

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    Log.i(TAG, "New Intent Arrived");
    dealWithTwitterResponse(intent);
}

@Override
protected void onResume() {
    super.onResume();
    Log.i(TAG, "Arrived at onResume");
}


private void dealWithTwitterResponse(Intent intent) {
    Uri uri = intent.getData();
    if (uri != null && uri.toString().startsWith(CALLBACK_URL)) { // If the user has just logged in
        String oauthVerifier = uri.getQueryParameter("oauth_verifier");

        authoriseNewUser(oauthVerifier);
    }
}


private void authoriseNewUser(String oauthVerifier) {
    try {
        AccessToken at = mTwitter.getOAuthAccessToken(mReqToken, oauthVerifier);
        mTwitter.setOAuthAccessToken(at);

        saveAccessToken(at);

        // Set the content view back after we changed to a webview
        setContentView(R.layout.twite);

        enableTweetButton();
    } catch (TwitterException e) {
        Toast.makeText(this, "Twitter auth error x01, try again later", Toast.LENGTH_SHORT).show();
    }
}


private void enableTweetButton() {
    Log.i(TAG, "User logged in - allowing to tweet");
    mLoginButton.setEnabled(false);
    mTweetButton.setEnabled(true);
}


private void tweetMessage() {
    try {
        mTwitter.updateStatus("Test - Tweeting with @Blundell_apps #AndroidDev Tutorial using #Twitter4j http://blog.blundell-apps.com/sending-a-tweet/");

        Toast.makeText(this, "Tweet Successful!", Toast.LENGTH_SHORT).show();
    } catch (TwitterException e) {
        Toast.makeText(this, "Tweet error, try again later", Toast.LENGTH_SHORT).show();
    }
}

private void saveAccessToken(AccessToken at) {
    String token = at.getToken();
    String secret = at.getTokenSecret();
    Editor editor = mPrefs.edit();
    editor.putString(PREF_ACCESS_TOKEN, token);
    editor.putString(PREF_ACCESS_TOKEN_SECRET, secret);
    editor.commit();
}

}

And here is Manifest

  <application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/title_activity_main" 
        android:launchMode="singleInstance"
          android:configChanges="orientation|screenSize">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".twiti_backup"
         android:launchMode="singleInstance">     
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />               <data android:scheme="android" android:host="callback_main" />              </activity>
  <activity android:name=".MyTwite"/>
    <activity android:name=".mp3" />
     <activity android:name=".myfbapp" />
</application>

Here is Log cat when i try to launch twiti_backup from main activity

W/dalvikvm(16357): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0) E/AndroidRuntime(16357): FATAL EXCEPTION: main E/AndroidRuntime(16357): java.lang.VerifyError: com.example.uitest.twiti_backup

E/AndroidRuntime(16357): at java.lang.Class.newInstanceImpl(Native Method)

E/AndroidRuntime(16357): at java.lang.Class.newInstance(Class.java:1409) E/AndroidRuntime(16357): at android.app.Instrumentation.newActivity(Instrumentation.java:1040) E/AndroidRuntime(16357): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1735) E/AndroidRuntime(16357): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1842) E/AndroidRuntime(16357): at android.app.ActivityThread.access$1500(ActivityThread.java:132) E/AndroidRuntime(16357): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1038) E/AndroidRuntime(16357): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime(16357): at android.os.Looper.loop(Looper.java:143) E/AndroidRuntime(16357): at android.app.ActivityThread.main(ActivityThread.java:4263) E/AndroidRuntime(16357): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(16357): at java.lang.reflect.Method.invoke(Method.java:507) E/AndroidRuntime(16357): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) E/AndroidRuntime(16357): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) E/AndroidRuntime(16357): at dalvik.system.NativeStart.main(Native Method)