Java method for android:layout_gravity

Question

I would like to know if is there a way to call android:layout_gravity property from a Java method. I didn't found any method in Android documentation to do it. This is the picture of the layout I want to implement:

http://www.anddev.org/resources/image/2234

I know to do it through XML, as following:

<FrameLayout
    xlmns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">

      <Button
         android:layout_gravity="left|center_vertical"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="<" />


      <Button
         android:layout_gravity="right|center_vertical"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text=">" />
</FrameLayout>

But in my situation, I need to do it through Java code, because I'll implement another layout views dynamically. To avoid merging XML layout with Java code, I would prefer make all layout using Java.

btw here it wouldn't be necessary to mark it community wiki ;) — RoflcoptrException, May 31 '10 at 19:23

score 30 · Accepted Answer · edited Sep 22 '13 at 05:43

30

Well as far as I understand you looking for this It is for FrameLayout for other layout see appropriate LayoutParams classes. For setting gravity like in your XML use something like:

FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,Gravity.LEFT | Gravity.CENTER_VERTICAL)

followed by addView with newly constructed LayoutParams

edited Sep 22 '13 at 05:43

BlaShadow

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answered May 31 '10 at 20:07

Nikolay Ivanov

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thre is no CENTRAL_VERTICAL, it should be [CENTER_VERTICAL](http://developer.android.com/reference/android/view/Gravity.html) – Mithun Sreedharan Sep 02 '11 at 08:21
And WRAP_CONTENT should be `ViewGroup.LayoutParams.WRAP_CONTENT` – Simon Forsberg Sep 10 '12 at 18:28
Someone correct me if I'm wrong, but doesn't this set the "gravity" of the object not the "layout gravity"? I believe the OP is looking for "layout gravity" – BriCo84 Mar 19 '13 at 20:23
@ BriCo84 : no, its layout gravity, because its `LayoutParams` – xmen Dec 19 '13 at 18:01

score 2 · Answer 2 · answered Dec 20 '12 at 16:10

Watchout! This wouldn't work with LinearLayout though. Because LinearLayout.LayoutParams(...) constructor is different from FrameLayout.LayoutParams(...) constructor. The third parameter is not gravity but weight.

     LinearLayout.LayoutParams(int width, int height, float weight)

as opposed to

     FrameLayout.LayoutParams(int width, int height, int gravity)

and this call, despite not producing compiler error is actually wrong:

lparams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, Gravity.LEFT);

Although you cant set the gravity via the constructor but the gravity field of the LinearLayout.LayoutParams is public so you can use the gravity from there — , Dec 10 '14 at 14:34

score 2 · Answer 3 · answered May 31 '10 at 18:47

2

Maybe I misunderstand you, but here it is:

http://developer.android.com/reference/android/widget/TextView.html#setGravity(int)

answered May 31 '10 at 18:47

4

Unfortunately that's the gravity for the text within the TextView, not the gravity for the layout of the TextView itself. – Steve Haley May 31 '10 at 19:55
you can also use it for the button. the button inherits it – May 31 '10 at 20:02
Yes, Steve. =( Unfortunately that's the gravity for the text, the same of android:gravity. – André Leitão May 31 '10 at 20:21

score 1 · Answer 4 · answered Jan 30 '14 at 13:43

1

button.setBackgroundResource(R.drawable.sound_on);
        button.setText("On");
        button.setGravity(Gravity.CENTER_VERTICAL| Gravity.RIGHT);
        button.invalidate();

answered Jan 30 '14 at 13:43

all-ok

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layout_gravity is not the same thing as gravity. Gravity is the gravity of your children. Layout gravity is you telling your parent layout what you want your gravity to be. – MinceMan Feb 26 '14 at 20:06

score 1 · Answer 5 · answered Jun 01 '14 at 20:33

To change the layout_gravity attribute for an existing view:

Button button = (Button) findViewById(R.id.some_button);
FrameLayout.LayoutParams params;
params = (LayoutParams) button.getLayoutParams();

params.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL;
button.setLayoutParams(params);

The button is contained in a FrameLayout which has a gravity attribute corresponding to the layout_gravity XML attribute. Documentation link.

score -2 · Answer 6 · edited Jun 14 '15 at 22:49

-2

before adding the button, you should change the orientation of your layout

yourbutton.setGravity(Gravity.RIGHT);
LayoutParams layout = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, Gravity.RIGHT);
layout.gravity = Gravity.RIGHT;
yourbutton.setLayoutParams(layout);


yourlayout.setGravity(Gravity.RIGHT);
yourlayout.addView(yourbutton);

edited Jun 14 '15 at 22:49

Nick Volynkin

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answered Jun 14 '15 at 19:08

Ali Vizcaya

1

how does this answer the question? – Nick Volynkin Jun 14 '15 at 22:50

Java method for android:layout_gravity

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