Paint中PathDashPathEffect的简单使用

今天来了解一下PathDashPathEffect的简单使用，PathDashPathEffect与DashPathEffect的功能很像，不一样的就是它中间的实线部分，可以是我自定义的图形。看一下，方法

public PathDashPathEffect(Path shape, float advance, float phase,
                              Style style) {
        native_instance = nativeCreate(shape.ni(), advance, phase,
                                       style.native_style);
    }

官方的解释是：
shape是填充的图形，这个图形可以自己绘制，
advance是图形之间的间距，
phase是path的偏移量，
其中有3种style，TRANSLATE是指图形以平移的方式填充path，ROTATE会根据path的旋转而旋转，MORPH和ROTATE差不多，不过有一点就是MORPH会在转角的连接处以平滑的方式连接
（这里说明一下，MORPH，这个我试了一下，使用这个style，显示不出来，不知道为什么，如果有知道，请告诉我一下）
好了，话不多说，直接上代码，就一切都明白了

public class PathDashView extends View {

    private Paint mPaint;
    private Path mPath1;
    private Path mPath2;

    private Path mPath;
    private Paint mPaint1;
    private Paint mPaint2;

    private Path pPath;
    private Path pPath2;

    private PathEffect mPathEffect;
    private PathEffect mPathEffect1;
    private PathEffect mPathEffect2;

    public PathDashView(Context context) {
        this(context,null);
    }

    public PathDashView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public PathDashView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeWidth(5);
        mPaint.setColor(Color.RED);

        mPaint1 = new Paint(Paint.ANTI_ALIAS_FLAG);
        mPaint1.setStyle(Paint.Style.STROKE);
        mPaint1.setStrokeWidth(5);
        mPaint1.setColor(Color.RED);

        mPaint2 = new Paint(Paint.ANTI_ALIAS_FLAG);
        mPaint2.setStyle(Paint.Style.STROKE);
        mPaint2.setStrokeWidth(5);
        mPaint2.setColor(Color.RED);

        mPath = new Path();
        mPath.moveTo(0,300);
        mPath.lineTo(200,300);
        mPath.lineTo(400,100);
        mPath.lineTo(600,400);

        mPath1 = new Path();
        mPath1.moveTo(0,350);
        mPath1.lineTo(200,350);
        mPath1.lineTo(400,150);
        mPath1.lineTo(600,450);

        mPath2 = new Path();
        mPath2.moveTo(0,400);
        mPath2.lineTo(200,400);
        mPath2.lineTo(400,200);
        mPath2.lineTo(600,500);

        //第一种间隔，小圆点
        pPath = new Path();
        pPath.addCircle(0,0,5,Path.Direction.CW);

        //第二种间隔，小三角
        pPath2 = new Path();
        pPath2.moveTo(5,0);
        pPath2.lineTo(0,5);
        pPath2.lineTo(10,5);
        pPath2.lineTo(5,0);

        mPathEffect = new PathDashPathEffect(pPath,20,0,PathDashPathEffect.Style.ROTATE);
        mPathEffect1 = new PathDashPathEffect(pPath,20,0,PathDashPathEffect.Style.TRANSLATE);
        mPathEffect2 = new PathDashPathEffect(pPath2,20,6,PathDashPathEffect.Style.ROTATE);

        mPaint.setPathEffect(mPathEffect);
        mPaint1.setPathEffect(mPathEffect1);
        mPaint2.setPathEffect(mPathEffect2);

    }


    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        canvas.drawPath(mPath,mPaint);
        canvas.drawPath(mPath1,mPaint1);
        canvas.drawPath(mPath2,mPaint2);
    }
}