Set attributes in java

Question

In my layout xml, if I do something like android:layout_marginTop="10px", how can I do that same thing in java?

Answer 1

Try this:

RelativeLayout rel=new RelativeLayout(this);
mWidth=getWindowManager().getDefaultDisplay().getWidth();
RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams(mWidth,mHeight);
Button mBtn=(Button) findViewById(R.id.xBtn);
params=new RelativeLayout.LayoutParams(mWidth, mHeight);
params.setMargins(int left, int top, int right, int bottom);
mBtn.setLayoutParams(params);