java类android.graphics.Xfermode的实例源码

/**
 * Set erase to true when the erase button is clicked.
 *
 * @param isErase {@code true} if erase is clicked {@code false} otherwise
 */
public void setErase(boolean isErase) {
    Xfermode xfermode = isErase ? new PorterDuffXfermode(
            PorterDuff.Mode.CLEAR) : null;
    drawPaint.setXfermode(xfermode);
}

/**
 * Sets the blend mode to use when applying this fill
 */
void setBleningMode(Xfermode mode);

/**
 * Returns the blend mode to use when applying this fill.
 * 
 * @return {@link Xfermode} May be <code>null</code>
 */
Xfermode getBleningMode();