public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		final Button button = (Button) findViewById(R.id.sendtweet);
		button.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				Intent intent = new Intent("com.twidroid.SendTweet");
				
				intent.putExtra("com.twidroid.extra.MESSAGE",
						"This is a test from Twidroid public intent.");
				
				try {
					startActivityForResult(intent, 1);
				} catch (ActivityNotFoundException e) {
					/* Handle Exception if Twidroid is not installed */
					TextView text = (TextView) findViewById(R.id.message);
					text.setText("Twidroid Application not found.");
				    button.setVisibility(View.GONE);
				}
			}
		});

	}

http://www.twidroid.com

Use Twidroid's public intent to send Twitter messages from your own  Android application

twitter, android

Java