PathEffectView.java 文件源码

@Override protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  //无效果
  mEffects[0] = null;
  //拐角处变得圆滑
  mEffects[1] = new CornerPathEffect(30);
  //线段上就会产生许多杂点
  mEffects[2] = new DiscretePathEffect(3.0F, 5.0F);
  //绘制虚线
  mEffects[3] = new DashPathEffect(new float[] { 20, 10, 5, 10 }, 0);
  Path path = new Path();
  path.addRect(0, 0, 8, 8, Path.Direction.CCW);
  //设置点的图形,即方形点的虚线,圆形点的虚线
  mEffects[4] = new PathDashPathEffect(path, 12, 0, PathDashPathEffect.Style.ROTATE);
  //组合PathEffect
  mEffects[5] = new ComposePathEffect(mEffects[3], mEffects[1]);
  for (int i = 0; i < mEffects.length; i++) {
    mPaint.setPathEffect(mEffects[i]);
    canvas.drawPath(mPath, mPaint);
    canvas.translate(0, 200);
  }
}