如何在不影响父视图的情况下设置子视图的Layoutparams？

Question

I have a custom row view for a list. Say there are 2 components a parent and a child....i want to maintain the height of the parent to be constant when i change the height of the child...

I have set the parent height constant and the height of the child is varied dynamically.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/parent"
android:layout_width="wrap_content"
android:layout_height="150dp"
android:background="#fff"
android:orientation="vertical" >


<RelativeLayout
    android:id="@+id/child"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/icon" />

</RelativeLayout>
</LinearLayout>

and during runtime,

child.setLayoutParams(new LayoutParams(30, x);

where x is a varying height variable. Still the height of the parent is getting affected. any solutions?

Answer 1

If the LinearLayout is the root view, when you are inflating it the params android:layout_width and android:layout_height are changed by android, if it is a row inside a list, then they will have the width match_parent and the height wrap_content. If you want to keep a constant height for the row you will have to set the layout params programatically after you inflate the view.