SweepGradientRadarView.java 文件源码

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    mCx = w / 2;
    mCy = h / 2;
    mSweepGradient = new SweepGradient(mCx, mCy,
            new int[]{Color.argb(25, 0, 255, 0),
                    Color.argb(80, 0, 255, 0),
                    Color.argb(200, 0, 255, 0)},
            new float[]{0, 0.95f, 1.0f});
    mPaint = new Paint();
    mPaint.setShader(mSweepGradient);
    mDividerPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mCircleDividerColor = Color.BLACK;
    mCrossDividerColor = Color.WHITE;
    mRadarBgColor = Color.rgb(154, 154, 154);
    mDividerPaint.setColor(mCircleDividerColor);
    mDividerPaint.setStrokeWidth(3);
    mDividerPaint.setStyle(Paint.Style.STROKE);
}