public MyStyleView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
Log.i(TAG, "MyStyleView3");
/**
     * 獲得我們所定義的自定義樣式屬性
     */
TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CustomStyleView, defStyleAttr, 0);
    int n = a.getIndexCount();
 
    for (int i = 0; i < n; i++)
    {
int attr = a.getIndex(i);
        switch (attr)
        {
case R.styleable.CustomStyleView_mTitleText:

mTitleText = a.getString(attr);
                break;
            case R.styleable.CustomStyleView_mTitleTextColor:
// 預設顏色設定為黑色
mTitleTextColor = a.getColor(attr, Color.BLACK
 
);
                break;
            case R.styleable.CustomStyleView_mTitleTextSize:
// 預設設定為16sp，TypeValue也可以把sp轉化為px
mTitleTextSize = a.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(
                        TypedValue.COMPLEX_UNIT_SP, 16, getResources().getDisplayMetrics()));
                break;
 
}

    }
    a.recycle();
/**
     * 獲得繪製文字的寬和高
     */
mPaint = new Paint();
mPaint.setTextSize(mTitleTextSize);
// mPaint.setColor(mTitleTextColor);
mBound = new Rect();
mPaint.getTextBounds(mTitleText, 0, mTitleText.length(), mBound);
}