旧的android版本恢复了背景色

Question

I'm developing a UI with the version17 (With Galaxy Nexus) for Android, and, I got the background white. When I try the same code in a version15 (with Galaxy II) the background is black. So, Why is the color different if the code is the same??

Another question is that I was using to TextView the function setBackground and it's just for the version16 or newer. Is it the setBackgroundResourse the equivalent?

This is an example of as I'm making the code.

FrameLayout frame = new FrameLayout(this);
        frame.setId(findId());
        FrameLayout.LayoutParams frameParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,FrameLayout.LayoutParams.MATCH_PARENT);               
        frame.setBackgroundResource(idBorder);
        frame.setLayoutParams(frameParams);


        //Relative layaout que engloba todo
        RelativeLayout relativeLayout = new RelativeLayout(this);
        //relativeLayout.setId(findId());
        RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);     
        relativeLayout.setLayoutParams(relativeParams);         
        relativeLayout.setPadding(5, 5, 5, 5);
        relativeParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
        relativeParams.addRule(RelativeLayout.CENTER_VERTICAL);
        relativeLayout.setBackgroundColor(Color.WHITE);
        //relativeLayout.setBackground(getResources().getDrawable(idBorder));
        relativeLayout.setBackgroundResource(idBorder);
        frame.addView(relativeLayout);

        //Nombre de la sala
        TextView textRoomName = new TextView(this);
        textRoomName.setId(findId());
        relativeLayout.addView(textRoomName);

        textRoomName.setText(room.getName());
        RelativeLayout.LayoutParams relativeParamRoomName = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);      
        relativeParamRoomName.addRule(RelativeLayout.ALIGN_PARENT_LEFT);    
        relativeParamRoomName.setMargins(10, 10, 10, 5);    
        textRoomName.setLayoutParams(relativeParamRoomName);
        textRoomName.setTextColor(Color.parseColor("#040404"));
        textRoomName.setTextSize(20);
        textRoomName.setTypeface(null, Typeface.BOLD);
        textRoomName.setPadding(3, 3, 3, 3);        
        //textRoomName.setBackground(getResources().getDrawable(idBorder));
        textRoomName.setBackgroundResource(idBorder);

Answer 1

You can see what theme the application is using in Manifest file and style.xml. See this to maintain compatibility.