InkPageIndicator.java 文件源码

public InkPageIndicator(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    final int density = (int) context.getResources().getDisplayMetrics().density;

    // Load attributes
    final TypedArray a = getContext().obtainStyledAttributes(
            attrs, R.styleable.InkPageIndicator, defStyle, 0);

    dotDiameter = a.getDimensionPixelSize(R.styleable.InkPageIndicator_dotDiameter,
            DEFAULT_DOT_SIZE * density);
    dotRadius = dotDiameter / 2;
    halfDotRadius = dotRadius / 2;
    gap = a.getDimensionPixelSize(R.styleable.InkPageIndicator_dotGap,
            DEFAULT_GAP * density);
    animDuration = (long) a.getInteger(R.styleable.InkPageIndicator_animationDuration,
            DEFAULT_ANIM_DURATION);
    animHalfDuration = animDuration / 2;
    unselectedColour = a.getColor(R.styleable.InkPageIndicator_pageIndicatorColor,
            DEFAULT_UNSELECTED_COLOUR);
    selectedColour = a.getColor(R.styleable.InkPageIndicator_currentPageIndicatorColor,
            DEFAULT_SELECTED_COLOUR);

    a.recycle();

    unselectedPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    unselectedPaint.setColor(unselectedColour);
    selectedPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    selectedPaint.setColor(selectedColour);
    interpolator = new FastOutSlowInInterpolator();

    // create paths & rect now – reuse & rewind later
    combinedUnselectedPath = new Path();
    unselectedDotPath = new Path();
    unselectedDotLeftPath = new Path();
    unselectedDotRightPath = new Path();
    rectF = new RectF();

    addOnAttachStateChangeListener(this);
}