Change Relative layout width and height dynamically

Question

Hi i am using following layout structure inside LinearLayout

<TableLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >

    <TableRow
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
    </TableRow>

    <TableRow
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/tv1"
            android:layout_height="wrap_content"
            android:gravity="left"
            android:paddingLeft="10dp"
            android:textColor="#000" />

        <TextView
            android:id="@+id/tv2"
            android:layout_height="wrap_content"
            android:layout_weight="1.0"
            android:gravity="right"
            android:paddingRight="10dp"
            android:textColor="#000" />
    </TableRow>
</TableLayout>

<ImageView
    android:id="@+id/img1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center" />

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="320px"
    android:layout_height="320px"
    android:gravity="center" >
</RelativeLayout>

and want to set relative layout width and height dynamically from java file instead of setting it to 320px in the xml file but not able to do that , Orientation change is not an issue for as i restricting it to only in Portrait mode. It is possible to set the relative layout on full screen by using match_parent but i have to put another views on the screen so is it possible or i have to achieve it another way...

To set the layout width dynamically you will have to extend the RelativeLayout class from a class that you created and override the onMeasure method — the-ginger-geek, Mar 15 '13 at 05:12
Thanks for reply , I have tried every thing and it's giving class cast exception when i try to set the width and height dynamically. The relative layout also contain other child as image views so i take it as View Group in java file but unable to do that . — Vikas Panwar, Mar 15 '13 at 06:05
this is the code .. ViewGroup container = (ViewGroup) this.findViewById(R.id.containerr); i am accessing that Relative layout as ViewGroup where containerr is the id of the relative layout in the xml file. — Vikas Panwar, Mar 15 '13 at 06:51
if i set the layoutparams to container it shows error.. Java.lang.ClassCastException:RelativeLayout&LayoutParams cannot be cast to LinearLayout&LayoutParams — Vikas Panwar, Mar 15 '13 at 07:02
You are getting a LinearLayout in your xml for the id you are getting according to the Error. Also why are you using ViewGroup and not View? — the-ginger-geek, Mar 15 '13 at 07:04
Actually i am making an puzzle game and have put 16 pieces of an image into that Relative layout to swap, that's why i am using ViewGroup. I am getting Linear Layout for the id according to the error that may be because of the xml file's parent view is LinearLayout. — Vikas Panwar, Mar 15 '13 at 07:18

score 26 · Accepted Answer · edited May 14 '15 at 16:22

26

Android does NOT refresh layout of views with wrap_content once it has been displayed. Even with invalidate() or requestLayout(). So if you add a child view, or modify the content dynamically, you're screwed.

getLayoutParams().height = x plus requestLayout() are a good solution if you know the "x", and if you need to do it ONLY ONCE. After that the wrap_content in LayoutParams is lost, since you have overridden it.

To solve that, I've written a static class that recomputes the sizes and forces the update of the layout for the views with wrap_content. The code and instructions to use are available here:

https://github.com/ea167/android-layout-wrap-content-updater

Enjoy!

edited May 14 '15 at 16:22

ahmed hamdy

5,096
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answered Apr 02 '14 at 21:00

Eric

795
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15

Hey Eric, do you have a usage example for your code? I can't seem to access the methods from your class?! – patrics Feb 13 '15 at 18:44
You effectively rescued my life with that class. Thank you so much. – Namnodorel Sep 10 '16 at 14:38

score 18 · Answer 2 · answered Mar 15 '13 at 05:11

18

try using this

getLayoutParams().height= x;
requestLayout(); or invalidate();

answered Mar 15 '13 at 05:11

Anu

553
5
14

score 8 · Answer 3 · answered Mar 15 '13 at 05:24

give an id to your relative layout in .xml :

android:id="@+id/relativelayout"

now in your java file write this:

RelativeLayout Rl = (RelativeLayout) findViewById(R.id.relativelayout);

RelativeLayout.LayoutParams layout_description = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT or YourUserDefinedwidth,
                        RelativeLayout.LayoutParams.FILL_PARENT or YourUserDefinedHeight);

Rl.setLayoutParams(layout_description);

score 2 · Answer 4 · answered Mar 15 '13 at 05:17

2

From below code u can get device height and width:-

Display display = getWindowManager().getDefaultDisplay();
    int width = (display.getWidth() );
    int height = (display.getHeight() );

paramsTop ur realative layout:-

Now u can set height or width what you want.

        paramsTop = new RelativeLayout.LayoutParams(width, height);

answered Mar 15 '13 at 05:17

duggu

37,851
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This is deprecated code. Please refer to the following thread for non-deprecated code: http://stackoverflow.com/questions/4743116/get-screen-width-and-height – Simon Jul 25 '15 at 18:27

score 2 · Answer 5 · answered Mar 15 '13 at 05:18

You can set views dimensions dynamically using LayoutParams. Something like this:

RelativeLayout layout = (RelativeLayout) findViewById(R.id.yourlayout_id);
// Gets the layout params that will allow you to resize the layout
LayoutParams params = layout.getLayoutParams();
params.height = 320;
params.width = 320;

score 2 · Answer 6 · answered Jan 29 '16 at 06:23

I faced this problem, the best solution for Change Relative layout width and height dynamically like this

RelativeLayout relMain = (RelativeLayout) convertView.findViewById(R.id.relMain);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    params.width =200;
 params.height =200;
 params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
        relMain.setLayoutParams(params);

How to add duration to this? – reza_khalafi Sep 21 '19 at 08:15 — reza_khalafi, Sep 21 '19 at 08:15

score 1 · Answer 7 · answered Nov 20 '16 at 00:08

1

If you intending to change Height, then this would make a trick.

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

answered Nov 20 '16 at 00:08

shaiban

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score 0 · Answer 8 · answered Sep 10 '21 at 10:00

I encountered same issue when working with LinearLayout which has wrap_content and one child as TextView which had match_parent.

Remove the TextView programatically and then add it again.

linearLayout.removeView(textView)
linearLayout.addView(textView)

I know it sound stupid but it works. In my case calling invalidate didn't work, only this worked.

Depending on your implementation you need to take care of view index inside its parent

Change Relative layout width and height dynamically

8 Answers8

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