Creating a Pop-Up Dialog

Dialog XML File:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"
        tools:ignore="UselessParent">

                <!-- ENTER YOUR ELEMENTS HERE! -->

        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

Code to show Dialog XML in your Activity:

final Dialog dd = new Dialog(ACTIVITY.this);
dd.setTitle("TITLE");
dd.setContentView(R.layout.XMLSHEETABOVE);
// OTHER CODE HERE
dd.show();

If you want to close the Dialog use:

dd.dismiss();