How to Declare a LayoutParams, in Java

LinearLayout.LayoutParams was added in API Level 1
Per-child layout information associated with ViewLinearLayout.

1. In the MainActivity.java file, add the below line to the imports section.

import android.widget.LinearLayout;

2. In the MainActivity.java file, add the below line to the onCreate method. This will create a new LinearLayout.LayoutParams named lp.

LinearLayout.LayoutParams lp;

3. Compile and run!

Resources:
http://developer.android.com/reference/android/widget/LinearLayout.html

http://developer.android.com/reference/android/widget/LinearLayout.LayoutParams.html