动态显示复选框

Question

当我尝试动态显示复选框时，每个都与其他重叠。我尝试的代码是

while(pCur.moveToNext()){
    String phoneNo=pCur.getString(pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));    
RelativeLayout rl=(RelativeLayout)findViewById(R.id.r1);
        ScrollView scroll = new ScrollView(MainActivity.this);
        CheckBox c1 = new CheckBox (MainActivity.this);
        c1.setText(name);
        c1.setBackgroundColor( -16776961);
        LayoutParams lp=new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);
        lp.bottomMargin=10;
        LayoutParams lp1=new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);
                                 c1.setLayoutParams(lp);
        scroll.addView(c1);
        scroll.setLayoutParams(lp1);
        rl.addView(scroll);
}

如何在下一行显示每个复选框？