Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);

Path path = new Path();

PathEffect cornerPathEffect = new CornerPathEffect(20);

PathEffect discretePathEffect = new DiscretePathEffect(20, 5);

PathEffect dashPathEffect = new DashPathEffect(new float[]{20, 10, 5, 10}, 0);

PathEffect pathDashPathEffect;

PathEffect sumPathEffect = new SumPathEffect(dashPathEffect, discretePathEffect);

PathEffect composePathEffect = new ComposePathEffect(dashPathEffect, discretePathEffect);

public Practice12PathEffectView(Context context) {

super(context);

}

public Practice12PathEffectView(Context context, @Nullable AttributeSet attrs) {

super(context, attrs);

}

public Practice12PathEffectView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

}

{

paint.setStyle(Paint.Style.STROKE);

path.moveTo(50, 100);

path.rLineTo(50, 100);

path.rLineTo(80, -150);

path.rLineTo(100, 100);

path.rLineTo(70, -120);

path.rLineTo(150, 80);

Path dashPath = new Path();

dashPath.lineTo(20, -30);

dashPath.lineTo(40, 0);

dashPath.close();

pathDashPathEffect = new PathDashPathEffect(dashPath, 50, 0, PathDashPathEffect.Style.MORPH);

}

@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

// 使用 Paint.setPathEffect() 来设置不同的 PathEffect

// CornerPathEffect

paint.setPathEffect(cornerPathEffect);

canvas.drawPath(path, paint);

canvas.save();

canvas.translate(500, 0);

// DiscretePathEffect

paint.setPathEffect(discretePathEffect);

canvas.drawPath(path, paint);

canvas.restore();

canvas.save();

canvas.translate(0, 200);

// DashPathEffect

paint.setPathEffect(dashPathEffect);

canvas.drawPath(path, paint);

canvas.restore();

canvas.save();

canvas.translate(500, 200);

// PathDashPathEffect

paint.setPathEffect(pathDashPathEffect);

canvas.drawPath(path, paint);

canvas.restore();

canvas.save();

canvas.translate(0, 400);

// SumPathEffect

paint.setPathEffect(sumPathEffect);

canvas.drawPath(path, paint);

canvas.restore();

canvas.save();

canvas.translate(500, 400);

// ComposePathEffect

paint.setPathEffect(composePathEffect);

canvas.drawPath(path, paint);

canvas.restore();

paint.setPathEffect(null);

}