RoundedIconGenerator.java 文件源码

/**
 * Constructs the generator and initializes the common members ignoring display density.
 *
 * @param iconWidthPx The width of the generated icon in pixels.
 * @param iconHeightPx The height of the generated icon in pixels.
 * @param cornerRadiusPx The radius of the corners in the icon in pixels.
 * @param backgroundColor Color at which the rounded rectangle should be drawn.
 * @param textSizePx Size at which the text should be drawn in pixels.
 */
public RoundedIconGenerator(int iconWidthPx, int iconHeightPx, int cornerRadiusPx,
        int backgroundColor, float textSizePx) {
    mIconWidthPx = iconWidthPx;
    mIconHeightPx = iconHeightPx;
    mCornerRadiusPx = cornerRadiusPx;

    mBackgroundRect = new RectF(0, 0, mIconWidthPx, mIconHeightPx);

    mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mBackgroundPaint.setColor(backgroundColor);

    mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
    mTextPaint.setColor(Color.WHITE);
    mTextPaint.setFakeBoldText(true);
    mTextPaint.setTextSize(textSizePx);

    FontMetrics textFontMetrics = mTextPaint.getFontMetrics();
    mTextHeight = (float) Math.ceil(textFontMetrics.bottom - textFontMetrics.top);
    mTextYOffset = -textFontMetrics.top;
}