While steelbytes' answer will probably give you more control over the individual sections of the gradient, you can do it without the path:
Paint m_Paint = new Paint();
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
// start at 0,0 and go to 0,max to use a vertical
// gradient the full height of the screen.
m_Paint.setShader(new LinearGradient(0, 0, 0, getHeight(), Color.BLACK, Color.WHITE, Shader.TileMode.MIRROR));
canvas.drawPaint(m_Paint);
}
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…