android set margin programmatically

Question

after i press a button, i would like to move a textfield programmatically from the actual position + 20 margin left.

this is my xml file:

<RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:paddingTop="5dp"     android:paddingBottom="5dp">       <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/txtField"         android:layout_below="@+id/txtField2"         android:layout_alignParentLeft="true"         android:layout_alignParentStart="true"         android:layout_marginLeft="20dp"         android:layout_toLeftOf="@+id/Seperator"         android:layout_toStartOf="@+id/Seperator"         android:layout_marginRight="10p" />      ....   </RelativeLayout> 

i tried this code:

parameter = new RelativeLayout.LayoutParams( RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); parameter.setMargins(30, 32, 10, 0); // left, top, right, bottom txtField.setLayoutParams(parameter); 

this works semi optimal. is there an way to use all the values of an xml file and only change the margin left value programmatically?

Answer 1

Try this code:

parameter =  (RelativeLayout.LayoutParams) txtField.getLayoutParams(); parameter.setMargins(leftMargin, parameter.topMargin, parameter.rightMargin, parameter.bottomMargin); // left, top, right, bottom txtField.setLayoutParams(parameter);