Changing relative layout programmatically

Question

I've relative layout i.e. main.xml which I set as follows. But now I've to put view1 on view2 with width=200dp and height =100dp, so that view2 will be large one and view1 will be small one on it.

public void onCreate(Bundle savedInstanceState) 
         {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
         }

main.xml

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <RelativeLayout
    android:id="@+id/MainPanel"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_above="@id/panel_bottom"
    android:layout_gravity="center_horizontal" >

    <com.proj.demo.view1
        android:id="@+id/sheet"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignWithParentIfMissing="true"
        android:layout_centerInParent="true"
        android:layout_toLeftOf="@+id/panel_quick_buttons"
        />

    <com.proj.demo.view2
        android:id="@+id/sheet2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignWithParentIfMissing="true"
        android:layout_centerInParent="true"
        android:layout_toLeftOf="@+id/panel_quick_buttons"
      />

</RelativeLayout>
</RelativeLayout>

goodm · Accepted Answer · 2014-05-24T15:51:02.417

29

What do you want to achieve? If you just want to change width and heigh than:

    RelativeLayout rl = (RelativeLayout) findViewById(R.id.yourId);
    rl.getLayoutParams().height = 100;
    rl.getLayoutParams().width = 100;

edited May 24 '14 at 15:51

answered May 17 '12 at 08:22

goodm

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then call invalidate() from rl afterwards. – Gökhan Barış Aker May 17 '12 at 08:25
Nothing happen when I call rl.invalidate(). But it will change after I scroll the screen. Anyway to refresh the whole screed? – Bagusflyer Nov 24 '13 at 03:40
3

@bagusflyer you can use rl.requestLayout(); – Saurabh Android Oct 28 '14 at 06:47

score 0 · Answer 2 · answered May 20 '23 at 16:17

I have found some void changes when try to change multiples times the size like this :

relativeLayout.layoutParams.width = size
relativeLayout.layoutParams.height = size

So, insted you can use this kotlin function

Executes block with the View's layoutParams and reassigns the layoutParams with the updated version.

relativeLayout.updateLayoutParams {
    width = size
    height = size
}

Changing relative layout programmatically

2 Answers2

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