first sb

public (Context context) {  
    this(context, null);  
}  
  
public (Context context, AttributeSet attrs) {  
    this(context, attrs, 0);  
}  
  
public (Context context, AttributeSet attrs, int defStyleAttr) {  
    super(context, attrs, defStyleAttr);  
    
     * 获取自定义参数 
     */  
    TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.TipView,defStyleAttr,0);  
    radius = ta.getDimension(R.styleable.TipView_radius,radius);  
    arrowHeight = ta.getDimension(R.styleable.TipView_arrowHeight, arrowHeight);  
    bgColor = ta.getColor(R.styleable.TipView_bgColor, bgColor);  
    bgColor_pressed = ta.getColor(R.styleable.TipView_bgColor_pressed, bgColor_pressed);  
    direction = ta.getInt(R.styleable.TipView_direction, direction);  
    nowColor = bgColor;  
    ta.recycle();  
    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);  
    init();  
}