I want to send a tweet from Android.I have executed the following code.But I am not bale to send any tweets.Avtually the button I created is not working.Can anybody tel me wats the prob?

This is my code..

package samplecode.sampleapp.sampletwidgitpublicintent;

import android.app.Activity;

import android.content.ActivityNotFoundException; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.os.Bundle;

public class TwidgitPublicIntent extends Activity implements OnClickListener {

private static final int TWIDGIT_REQUEST_CODE = 2564;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    ((Button)findViewById(R.id.tweet_button)).setOnClickListener(this);
    ((Button)findViewById(R.id.mention_button)).setOnClickListener(this);
    ((Button)findViewById(R.id.retweet_button)).setOnClickListener(this);
    ((Button)findViewById(R.id.message_button)).setOnClickListener(this);
}
public void onClick(View v) {
    switch(v.getId()) {
        case R.id.tweet_button:

            // Standard tweet
            Intent tIntent = new Intent("com.disretrospect.twidgit.TWEET");
            tIntent.putExtra("com.disretrospect.twidgit.extras.MESSAGE", "_message_in_here_");
            try {
                this.startActivityForResult(tIntent, TWIDGIT_REQUEST_CODE);
            } catch (ActivityNotFoundException e) {
                // If Twidgit is not installed
            }

            break;
        case R.id.mention_button:

            // Mention
            Intent mIntent = new Intent("com.disretrospect.twidgit.MENTION");
            mIntent.putExtra("com.disretrospect.twidgit.extras.TO", "_username_to_xmention_");
            mIntent.putExtra("com.disretrospect.twidgit.extras.MESSAGE", "_message_in_here_");
            try {
                this.startActivityForResult(mIntent, TWIDGIT_REQUEST_CODE);
            } catch (ActivityNotFoundException e) {
                // If Twidgit is not installed
            }

            break;
        case R.id.retweet_button:

            // Retweet a tweet
            Intent rtIntent = new Intent("com.disretrospect.twidgit.RETWEET");
            rtIntent.putExtra("com.disretrospect.twidgit.extras.MESSAGE", "_message_in_here_");
            rtIntent.putExtra("com.disretrospect.twidgit.extras.VIA", "_original_author_of_tweet_name_");
            try {
                this.startActivityForResult(rtIntent, TWIDGIT_REQUEST_CODE);
            } catch (ActivityNotFoundException e) {
                // If Twidgit is not installed
            }

            break;
        case R.id.message_button:

            // Send DM
            Intent dmIntent = new Intent("com.disretrospect.twidgit.DIRECT_MESSAGE");
            dmIntent.putExtra("com.disretrospect.twidgit.extras.TO", "_username_to_send_dm_to_");
            dmIntent.putExtra("com.disretrospect.twidgit.extras.MESSAGE", "_message_in_here_");
            try {
                this.startActivityForResult(dmIntent, TWIDGIT_REQUEST_CODE);
            } catch (ActivityNotFoundException e) {
                // If Twidgit is not installed
            }

            break;
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    // Check result code
    if(resultCode == Activity.RESULT_OK) {
        // Check requestCode
        switch(requestCode) {
            case TWIDGIT_REQUEST_CODE:
                // Handle successful return
            break;
        }
    } else if(resultCode == Activity.RESULT_CANCELED){
        // Handle canceled activity
    }
}

}