Android - 以编程方式为LinearLayout设置Layout_Gravity

Question

I've got the following problem: I implemented a HorizontalScrollView which contains in one case a LinearLayout and an ImageView . In this case the image is about 50% of the screen width. So I want to center it. Unfortunately the only way I found to center it is, to use layout_gravity="center" on the LinearLayout .

Here's my xml:

<HorizontalScrollView
            android:layout_gravity="center"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">

        <LinearLayout
                android:orientation="horizontal"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

        <ImageView                    
                android:src="@drawable/myImg"
                android:layout_width="wrap_content"
                android:adjustViewBounds="true"
                android:layout_height="150dp"/>

        </LinearLayout>

    </HorizontalScrollView>

But I need to set the layout_gravity programmatically. Does anybody has an idea how I can achieve this or knows a different way? All the things I found via Google are not working for me like this post .

Thanks!

Answer 1

Do somethings like this :

   LayoutParams lp = new LayoutParams();
   lp.gravity= Gravity.CENTER_HORIZONTAL; 
   myImg.setLayoutParams(lp);

UPDATE : Another way to do this :

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            params.weight = 1.0f;
            params.gravity = Gravity.CENTER;

            imageView.setLayoutParams(params);

Answer 2

Put the ImageView in a FrameLayout like this:

Removed extra code

ImageView image = new ImageView(mContext);
image.setLayoutParams(new FrameLayout.LayoutParams(width, height, gravity));

More info here .

Answer 3

I think , this one will work for you

FrameLayout.LayoutParams layoutParams = new ScrollView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
 layoutParams1.gravity(YourGravity);
yourImage.setLayoutParams(layoutParams);