问如何在android中编程对齐相对布局中的线性布局

EN

|--------------------|--> Relative Layout
|Horizontal linear 1 |
|Horizontal linear 2 |
|Horizontal linear 3 |
|--------------------| 

 ll = new LinearLayout(this);
        ll.setLayoutParams(new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
        TextView tv = new TextView(this);
        EditText ed = new EditText(this);
        Button bob = new Button(this);
        tv.setText("NextVal");
        ed.setHint("Number");
        ed.setId(++i);
        ed.setInputType(InputType.TYPE_CLASS_NUMBER);
        bob.setText("Rem");
        bob.setId(i);
        ll.setOrientation(LinearLayout.HORIZONTAL);
        allet.add(ed);
        ll.addView(tv);
        ll.addView(ed);
        ll.addView(bob);
        ll.setId(i);
        allli.add(ll);
        rl.addView(ll);