Add padding on view programmatically

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I am developing Android v2.2 app.

I have a Fragment. In the onCreateView(...) callback of my fragment class, I inflate an layout to the fragment like below:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.login, null);
        
    return view;
}

The above inflated layout file is (login.xml):

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Username" />

    
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Username" />

</LinearLayout>

I would like to set a paddingTop to the above <LinearLayout> element , and I want to do it in the Java code instead of do it in xml.

How to set paddingTop to <LinearLayout> in my fragment Java class code ??

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