class MyView extends View {    float phase;    PathEffect[] effects = new PathEffect[7];    int[] colors;    private Paint paint;    Path path;    public MyView(Context context) {        super(context);        paint = new Paint();        paint.setStyle(Paint.Style.STROKE);        paint.setStrokeWidth(4);        // 创建初始化Path        path = new Path();        path.moveTo(0, 0); // 设置绘制的起点在左上角        for (int i = 1; i <= 15; i++) {            path.lineTo(i * 20, (float) Math.random() * 60);        }        colors = new int[] { Color.BLACK, Color.BLUE, Color.CYAN, Color.GREEN, Color.MAGENTA, Color.RED,                Color.YELLOW };    }    @Override    protected void onDraw(Canvas canvas) {        // 将背景填充成白色        canvas.drawColor(Color.WHITE);        // -------下面开始初始化7中路径的效果        // 使用路径效果        effects[0] = null;        // 使用CornerPathEffect路径效果        effects[1] = new CornerPathEffect(10);        // 初始化DiscretePathEffect        effects[2] = new DiscretePathEffect(3.0f, 5.0f);        // 初始化DashPathEffect        effects[3] = new DashPathEffect(new float[] { 20, 10, 5, 10 }, phase);        // 初始化PathDashPathEffect        Path p = new Path();        p.addRect(0, 0, 8, 8, Path.Direction.CCW);        effects[4] = new PathDashPathEffect(p, 12, phase, PathDashPathEffect.Style.ROTATE);        // 初始化PathDashPathEffect        effects[5] = new ComposePathEffect(effects[2], effects[4]);        effects[6] = new SumPathEffect(effects[4], effects[3]);        // 将画布移到8,8处开始绘制        canvas.translate(8, 8);        // 依次使用7中不同路径效果,7种不 同的颜色来绘制路径        for (int i = 0; i < effects.length; i++)        {            paint.setPathEffect(effects[i]);            paint.setColor(colors[i]);            canvas.drawPath(path, paint);            canvas.translate(0, 60);        }        // 改变phase值,形成动画效果        phase += 1;        invalidate();    }}