ShareTest.java

package bastos.sharetest;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.widget.Toast;

public class ShareTest extends Activity {
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		Intent intent = new Intent();
		intent.setAction(Intent.ACTION_SEND);
		intent.setType("image/jpeg");
		Log.i("MAIN", getLastImageThumbUri().toString());
		intent.putExtra(Intent.EXTRA_STREAM, getLastImageThumbUri());
		try {
			startActivity(Intent.createChooser(intent, "Send file"));
		} catch (android.content.ActivityNotFoundException ex) {
			Toast.makeText(this, "Can't share this file", Toast.LENGTH_SHORT)
					.show();
		}

	}
	public Uri getLastImageThumbUri() {

		String[] proj = {MediaStore.Images.Media.DATA};

		Cursor cursor = managedQuery(
				MediaStore.Images.Media.EXTERNAL_CONTENT_URI, proj, // Which
				// columns
				// to return
				null, // WHERE clause; which rows to return (all rows)
				null, // WHERE clause selection arguments (none)
				null); // Order-by clause (ascending by name)

		int column_index = cursor
				.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
		cursor.moveToLast();
		return Uri.parse("file://" + cursor.getString(column_index));

	}
}