Java 类android.graphics.DiscretePathEffect 实例源码

@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);
  }
}

@Override
Paint initPaint() {
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setAntiAlias(true);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeJoin(Paint.Join.MITER);
    paint.setStrokeCap(Paint.Cap.SQUARE);
    paint.setStrokeMiter(0.2f);
    paint.setPathEffect(new DiscretePathEffect(2, 2));
    return paint;
}

private void initPaint() {
    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

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

    mPath = new Path();

    mPath.moveTo(0, 0);

    for(int i = 0;i<=30;i++){
        mPath.lineTo(i*35, (float)Math.random()*100);
    }

    mEffects = new PathEffect[7];
    mEffects[0] = null;
    mEffects[1] = new CornerPathEffect(10);
    mEffects[2] = new DiscretePathEffect(3.0F, 5.0F);
    mEffects[3] = new DashPathEffect(new float[] { 20, 10, 5, 10 }, mPhase);
    Path path = new Path();
    path.addRect(0, 0, 8, 8, Path.Direction.CCW);
    mEffects[4] = new PathDashPathEffect(path, 12, mPhase, PathDashPathEffect.Style.ROTATE);
    mEffects[5] = new ComposePathEffect(mEffects[2], mEffects[4]);
    mEffects[6] = new SumPathEffect(mEffects[4], mEffects[3]);

}

private void init(Context context) {
    mainTitlePaint = new Paint();
    mainTitlePaint.setColor(ContextCompat.getColor(context, R.color.white));
    mainTitlePaint.setTextAlign(Paint.Align.CENTER);
    mainTitlePaint.setTextSize(DensityUtils.sp2px(context, MAIN_TITLE_FONT_SIZE_SP));
    mainTitleOffsetY = -(mainTitlePaint.getFontMetrics().ascent +
            mainTitlePaint.getFontMetrics().descent) / 2;
    mainTitlePaint.setAntiAlias(true);

    circleColor = ContextCompat.getColor(context, R.color.whiteTransparent);
    subTitlePaint = new Paint();
    subTitlePaint.setColor(circleColor);
    subTitlePaint.setTextSize(DensityUtils.sp2px(context, SUB_TITLE_FONT_SIZE_SP));
    subTitleOffsetY = DensityUtils.sp2px(context, SUB_TITLE_FONT_OFFSET_DP);
    subTitleSeparator = getResources().getString(R.string.sub_title_separator);
    subTitlePaint.setAntiAlias(true);

    bigCirclePaint = new Paint();
    bigCirclePaint.setStrokeWidth(DensityUtils.dp2px(context, BIG_CIRCLE_SIZE));
    bigCirclePaint.setStyle(Paint.Style.STROKE);
    bigCirclePaint.setAntiAlias(true);

    blurPaint = new Paint(bigCirclePaint);
    blurSize = DensityUtils.dp2px(context, CIRCLE_BLUR_SIZE);

    PathEffect pathEffect1 = new CornerPathEffect(DensityUtils.dp2px(getContext(), BIG_CIRCLE_SHAKE_RADIUS));
    PathEffect pathEffect2 = new DiscretePathEffect(DensityUtils.dp2px(getContext(), BIG_CIRCLE_SHAKE_RADIUS),
            DensityUtils.dp2px(getContext(), BIG_CIRCLE_SHAKE_OFFSET));
    PathEffect pathEffect = new ComposePathEffect(pathEffect1, pathEffect2);
    bigCirclePaint.setPathEffect(pathEffect);

    dottedCirclePaint = new Paint();
    dottedCirclePaint.setStrokeWidth(DensityUtils.dp2px(context, DOTTED_CIRCLE_WIDTH));
    dottedCirclePaint.setColor(ContextCompat.getColor(context, R.color.whiteTransparent));
    dottedCirclePaint.setStyle(Paint.Style.STROKE);
    float gagPx = DensityUtils.dp2px(context, DOTTED_CIRCLE_GAG);
    dottedCirclePaint.setPathEffect(new DashPathEffect(new float[]{gagPx, gagPx}, 0));
    dottedCirclePaint.setAntiAlias(true);

    solidCirclePaint = new Paint();
    solidCirclePaint.setStrokeWidth(DensityUtils.dp2px(context, SOLID_CIRCLE_WIDTH));
    solidCirclePaint.setColor(ContextCompat.getColor(context, R.color.white));
    solidCirclePaint.setStyle(Paint.Style.STROKE);
    solidCirclePaint.setStrokeCap(Paint.Cap.ROUND);
    solidCirclePaint.setAntiAlias(true);

    dotPaint = new Paint();
    dotPaint.setStrokeWidth(DensityUtils.dp2px(context, DOT_SIZE));
    dotPaint.setStrokeCap(Paint.Cap.ROUND);
    dotPaint.setColor(ContextCompat.getColor(context, R.color.white));
    dotPaint.setAntiAlias(true);

    backgroundBitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.bg_step_law);

    // 设置手表 icon 的大小
    watchBitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.icon_headview_watch);
    float scale = DensityUtils.dp2px(context, WATCH_SIZE) / watchBitmap.getWidth();
    Matrix matrix = new Matrix();
    matrix.postScale(scale, scale);
    watchBitmap = Bitmap.createBitmap(watchBitmap,
            0, 0, watchBitmap.getWidth(), watchBitmap.getHeight(),
            matrix, true);
    watchOffset = DensityUtils.sp2px(context, WATCH_OFFSET_DP);

    fireworksCircle = new FireworksCircleGraphics(context);

    animationThread = new AnimationThread();
    animationThread.start();
}