Custom Dialog Android

package com.mobengineers;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

public class DashboardActivity extends Activity {
    private static final int DIALOG_CUSTOM_ANIMATION = 1;

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

    public void onButtonDownUpActivityClick(View view) {
        startActivity(new Intent(this, DownUpActivity.class));
    }

    public void onButtonDialogClick(View view) {
        showDialog(DIALOG_CUSTOM_ANIMATION);
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DIALOG_CUSTOM_ANIMATION:
            CustomAlertDialog dialog = new CustomAlertDialog(this);
            dialog.setTitle("Swich on Location providers for better !");
            dialog.setCancelable(true);
            dialog.setMessage("How this dialog....  just for fun)");
            dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
            dialog.setButton("Settings", new DialogInterface.OnClickListener() {
               
                @Override
                public void onClick(DialogInterface dialog, int which) {
                
                    dialog.dismiss();// TODO Auto-generated method stub
                   
                }
            });

            WindowManager.LayoutParams wmlp = dialog.getWindow()
                    .getAttributes();

            wmlp.gravity = Gravity.TOP;

            dialog.show();
            return dialog;
        }
        return super.onCreateDialog(id);
    }
}