LineChartRenderer.java 文件源码

@Override
public void draw(Canvas canvas) {
    final LineChartData data = dataProvider.getLineChartData();

    final Canvas drawCanvas;

    // softwareBitmap can be null if chart is rendered in layout editor. In that case use default canvas and not
    // softwareCanvas.
    if (null != softwareBitmap) {
        drawCanvas = softwareCanvas;
        drawCanvas.drawColor(Color.TRANSPARENT, Mode.CLEAR);
    } else {
        drawCanvas = canvas;
    }

    for (Line line : data.getLines()) {
        if (line.hasLines()) {
            if (line.isCubic()) {
                drawSmoothPath(drawCanvas, line);
            } else if (line.isSquare()) {
                drawSquarePath(drawCanvas, line);
            } else {
                drawPath(drawCanvas, line);
            }
        }
    }

    if (null != softwareBitmap) {
        canvas.drawBitmap(softwareBitmap, 0, 0, null);
    }
}