                        课程
                    
                        /移动开发
                        
                            /Android
                        
                        /Android UI模板设计

求解决为什么为这样

public class bar extends RelativeLayout {
private Button leftButton,rightButton;
private TextView tvTitle;

private int leftTextColor;
private Drawable leftBackground;
private String leftText;

private int rightTextColor;
private Drawable rightBackground;
private String rightText;

private int titleTextColor;
private float titleTextSize;
private String titleText;

public bar(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray ta= context.obtainStyledAttributes(attrs,R.styleable.Topbar);
leftTextColor=ta.getColor(R.styleable.Topbar_leftTextColor, 0);
leftBackground=ta.getDrawable(R.styleable.Topbar_leftBackground);
leftText=ta.getString(R.styleable.Topbar_leftText);

rightTextColor=ta.getColor(R.styleable.Topbar_rightTextColor, 0);
rightBackground=ta.getDrawable(R.styleable.Topbar_rightBackground);
rightText=ta.getString(R.styleable.Topbar_rightText);

titleTextColor=ta.getColor(R.styleable.Topbar_titleTextColor, 0);
titleTextSize=ta.getDimension(R.styleable.Topbar_titileTextSize, 0);
titleText=ta.getString(R.styleable.Topbar_title);

ta.recycle();

leftButton=new Button(context);
rightButton=new Button(context);
tvTitle=new TextView(context);

leftButton.setTextColor(leftTextColor);
leftButton.setBackground(leftBackground);
leftButton.setText(leftText);

rightButton.setTextColor(rightTextColor);
rightButton.setBackground(rightBackground);
rightButton.setText(rightText);

tvTitle.setText(titleText);
tvTitle.setTextColor(titleTextColor);
tvTitle.setTextSize(titleTextSize);
}
}