继承的RelativeLayout内LinearLayout内ImageView的边距不起作用

Question

<br.application.component.HexagonGrid
    android:id="@+id/hexagonGrid"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:id="@+id/searchResultList"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="12dp"
        android:orientation="vertical" >
    </LinearLayout>
</br.application.component.HexagonGrid>

HexagonGrid was created to put elements inside, like a RelativeLayout , this way:

public class HexagonGrid extends RelativeLayout {
    public HexagonGrid(Context context) {
        super(context);
    }

    public HexagonGrid(Context context, AttributeSet aSet) {
        super(context, aSet);
    }

    [...]

    private ImageView createGrayHexagonDefault() {
        ImageView grayHexagon = new ImageView(context);
        LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        lp.setMargins( 10, 0, 10, 0 );
        grayHexagon.setScaleType(ScaleType.MATRIX);
        grayHexagon.setImageDrawable(getResources().getDrawable(R.drawable.hexagon_disabled));
        grayHexagon.setLayoutParams(lp);
        return grayHexagon;
    }
}

And I am adding some images programmatically inside this searchResultList that is inside HexagonGrid .

LinearLayout searchResultList= (LinearLayout) findViewById(R.id.searchResultList);
searchResultList.addView(createGrayHexagonDefault());

I am not understanding why setMargins is not working:

lp.setMargins( 10, 0, 10, 0 );

Any one can tell me why?

Answer 1

OMG!

ImageView will have a LinearLayout as its parent, but there is two types of LayoutParams :

RelativeLayout.LayoutParams and LinearLayout.LayoutParams

For some reason, my project automatically selected RelativeLayout.LayoutParams as default. This way margins don't work.