android - How to position a Button in a RelativeLayout through code? -

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< relativelayout     android:layout_width="wrap_content"     android:layout_height="wrap_content">         < button android:text="previous"              android:layout_height="wrap_content"              android:id="@+id/measureprev"                        android:layout_alignparentbottom="true"             android:layout_width="wrap_content">         < / button> < / relativelayout >

can tell me how can using java code or in activity class? not know how set android:layout_alignparentbottom="true". want implement whole view via java code.

here dynamic equivalent of code : 

    relativelayout rl = new relativelayout(this);     layoutparams params = new relativelayout.layoutparams(layoutparams.wrap_content, layoutparams.wrap_content);     rl.setlayoutparams(params);     button button = new button(this);     button.settext("previous");     layoutparams params1 = new relativelayout.layoutparams(layoutparams.wrap_content, layoutparams.wrap_content);     params1.addrule(relativelayout.align_parent_bottom);     button.setlayoutparams(params1);     rl.addview(button);

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