NestHeader.java 文件源码

/**
     * @see android.view.ViewGroup#dispatchDraw(Canvas)
     */
    @Override
    protected void dispatchDraw(Canvas canvas) {
        if (mState == STATE_REFRESHING) {
//
//            float centerX = mArrowImageView.getMeasuredWidth() / 2;
//            float centerY = mArrowImageView.getMeasuredHeight() / 2;
//            Matrix matrix = mArrowImageView.getImageMatrix();
//            mArrowImageView.setScaleType(ScaleType.MATRIX);
//            matrix.postRotate(25, centerX, centerY);
//            mArrowImageView.setImageMatrix(matrix);
        }
        super.dispatchDraw(canvas);
        if (isInEditMode()) {
            return;
        }
        FontMetrics fontMetrics = mPaint.getFontMetrics();
        // 计算文字高度
        float fontHeight = fontMetrics.bottom - fontMetrics.top;
        // 计算文字baseline
        float textBaseY = getHeight() - (getHeight() - fontHeight) / 2 - fontMetrics.bottom;
        canvas.drawText(mstrTitle, getWidth() / 2 + mArrowImageView.getMeasuredWidth(), textBaseY, mPaint);
    }