ChangeTabStrip.java 文件源码

/**
 * 绘制左边阴影
 */
private void drawShadow(Canvas canvas){
    final float width = shadowWidth * (1 - selectionOffsetX);
    LinearGradient linearGradient = new LinearGradient(0, getHeight(), width, getHeight(), new int[] {shadowColor, Color.TRANSPARENT}, new float[]{shadowProportion, 1f}, Shader.TileMode.CLAMP);
    shadowPaint.setShader(linearGradient);
    canvas.drawRect(0, 0, width, getHeight(), shadowPaint);
}