Dialog newServerDialog = new Dialog(getContext(), R.style.CustomDialogStyleServerDetails);

newServerDialog.setContentView(newServerDialogLayout);
newServerDialog.setTitle(R.string.server_details_new_title_text);
newServerDialog.getWindow().setLayout(
    android.view.ViewGroup.LayoutParams.FILL_PARENT,
    android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
newServerDialog.setCancelable(true);

<style name="CustomDialogStyleServerDetails" parent="@android:style/Theme.Dialog">
    <item name="android:background">@drawable/server_details_background_repeat</item>
    <item name="android:windowTitleStyle">@style/DialogWindowTitle</item>
</style>

<style name="DialogWindowTitle">
    <item name="android:maxLines">1</item>
    <item name="android:scrollHorizontally">true</item>
    <item name="android:textAppearance">@style/customDialogTextAppearance</item>
    <item name="android:gravity">center_horizontal|center_vertical</item>
    <item name="android:background">@drawable/server_details_title_background_repeat</item>
</style>

ContextThemeWrapper mTheme = new ContextThemeWrapper(this,
        R.style.CustomDialogStyleServerDetails);

mInflater = (LayoutInflater) getBaseContext().getSystemService(
        LAYOUT_INFLATER_SERVICE);

ContextThemeWrapper mTheme = new ContextThemeWrapper(this,
        R.style.CustomDialogStyleServerDetails);

mView = mInflater.inflate(R.layout.YOUR_XML_LAYOUT_FILE, null);


mDialog = new Dialog(mTheme);
mDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
mDialog.setContentView(this.mView);
mDialog.show();