在java中获取attr的值

TypedValue value = new TypedValue();
        mContext.getTheme().resolveAttribute(R.attr.colorPrimary,value,true);

public MyView(Context context,AttributeSet attrs)     
    {     
        super(context,attrs);     
        mPaint = new Paint();     
             
        TypedArray a = context.obtainStyledAttributes(attrs,     
                R.styleable.MyView);     
             
        int textColor = a.getColor(R.styleable.MyView_textColor,     
                0XFFFFFFFF);     
        float textSize = a.getDimension(R.styleable.MyView_textSize, 36);     
             
        mPaint.setTextSize(textSize);     
        mPaint.setColor(textColor);     
             
        a.recycle();     
    }