Open Facebook Page with Android Sample Gist Code

MainActivity.java

package facebook.page.test;

import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        if (id == R.id.action_settings) {
            OpenFacebookPage();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    protected void OpenFacebookPage(){

        String facebookPageID = "dempagumi.inc";

        // URL
        String facebookUrl = "https://www.facebook.com/" + facebookPageID;

        String facebookUrlScheme = "fb://page/" + facebookPageID;

        try {
            int versionCode = getPackageManager().getPackageInfo("com.facebook.katana", 0).versionCode;

            if (versionCode >= 3002850) {
                Uri uri = Uri.parse("fb://facewebmodal/f?href=" + facebookUrl);
                startActivity(new Intent(Intent.ACTION_VIEW, uri));
            } else {
                startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(facebookUrlScheme)));
            }
        } catch (PackageManager.NameNotFoundException e) {
            startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(facebookUrl)));

        }

    }
}