relativelayout - How set android:layout_marginBottom programm? -


to drag image on screen created own class:

private class customimageview extends appcompatimageview

in constructor want set params:

public customimageview(context context) {     super(context);     params = new relativelayout.layoutparams(relativelayout.layoutparams.match_parent, relativelayout.layoutparams.match_parent);     params.bottommargin = 50;     this.setscaletype(imageview.scaletype.center_crop);     this.setlayoutparams(params);     this.setwillnotdraw(false); }

my activity_main.xml:

<relativelayout      xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="com.example.eleizo.firstapplication.mainactivity">    </relativelayout>

i want have :

<relativelayout      xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="com.example.eleizo.firstapplication.mainactivity">      <imageview         android:id="@+id/map"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:scaletype="centercrop"         android:layout_marginbottom="50dp"         /> </relativelayout>

why string "params.bottommargin = 50" doesn't work? tried set params = new relativelayout.layoutparams(val1,val2) it's no matter. how set android:layout_marginbottom in relativelayout code?

try using layoutparams while adding view in relative layout. viewgroup.addview(view, layoutparams) .

something this.

relativelayout.layoutparams params = new relativelayout.layoutparams(relativelayout.layoutparams.match_parent, relativelayout.layoutparams.match_parent); params.bottommargin = 50;  relativelayout.addview(new cutomimageview(context), params);

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