Android：创建动态频率（正弦）图

发布于 2024-12-25 19:40:21 字数 363 浏览 0 评论 0原文

我如何在android中创建动态频率图？像这样： http://www.jazzitalia.net/lezioni/sax/immagini/ grafico1.gif 没有轴。我有像这样的图表所需的相位、幅度和正常数据。我找到了这个例子： http://androidplot.com/wiki/A_Dynamic_XYPlot 但我没有知道这是否是执行此操作的完美方法...

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看透却不说透 2025-01-01 19:40:21

动态图示例是您想要的一个非常好的起点。更改 GetY 和 Runnable，使其按照您想要的方式处理数据。

至于图形的样式，您可以通过将 null 传递给 LineAndPointFormatter 上的适当参数来关闭填充和点。

下面的代码展示了如何在您不需要时关闭各种视觉功能。它已作为 TimedXyPlotExample 与源签入，但尚未发布。

    if (!mBackgroundOn) {
        // remove the background stuff.
        mDynamicPlot.setBackgroundPaint(null);
        mDynamicPlot.getGraphWidget().setBackgroundPaint(null);
        mDynamicPlot.getGraphWidget().setGridBackgroundPaint(null);
    }

    if (!mKeyOn)
        mDynamicPlot.getLayoutManager()
                .remove(mDynamicPlot.getLegendWidget());
    if (!mDomainLabelOn)
        mDynamicPlot.getLayoutManager().remove(
                mDynamicPlot.getDomainLabelWidget());
    if (!mDomainAxisOn) {
        mDynamicPlot.getGraphWidget().setDomainLabelPaint(null);
        mDynamicPlot.getGraphWidget().setDomainOriginLabelPaint(null);
    }
    if (!mBoarderOn)
        mDynamicPlot.setDrawBorderEnabled(false);
    if (!mRangeLabelOn)
        mDynamicPlot.getLayoutManager().remove(
                mDynamicPlot.getRangeLabelWidget());
    if (!mRangeAxisOn) {
        mDynamicPlot.getGraphWidget().setRangeLabelPaint(null);
        mDynamicPlot.getGraphWidget().setRangeOriginLabelPaint(null);
    }
    if (!mGridOn) {
        mDynamicPlot.getGraphWidget().setGridLinePaint(null);
        mDynamicPlot.getGraphWidget().setDomainOriginLinePaint(null);
        mDynamicPlot.getGraphWidget().setRangeOriginLinePaint(null);
    }
    if (!mTitleOn) 
        mDynamicPlot.getLayoutManager().remove(mDynamicPlot.getTitleWidget());

The dynamic plot example is a very good starting point for what you want. Change GetY and the Runnable to make it do the data the way you want it.

As for the style of the graph you can switch thhe fill off and the points off by passing in null to the apripriate parrameter on the LineAndPointFormatter.

Here is code to show how to switch various visual features off if you don't want them. It's checked in with the source as TimedXyPlotExample but has not made it into a release yet.

    if (!mBackgroundOn) {
        // remove the background stuff.
        mDynamicPlot.setBackgroundPaint(null);
        mDynamicPlot.getGraphWidget().setBackgroundPaint(null);
        mDynamicPlot.getGraphWidget().setGridBackgroundPaint(null);
    }

    if (!mKeyOn)
        mDynamicPlot.getLayoutManager()
                .remove(mDynamicPlot.getLegendWidget());
    if (!mDomainLabelOn)
        mDynamicPlot.getLayoutManager().remove(
                mDynamicPlot.getDomainLabelWidget());
    if (!mDomainAxisOn) {
        mDynamicPlot.getGraphWidget().setDomainLabelPaint(null);
        mDynamicPlot.getGraphWidget().setDomainOriginLabelPaint(null);
    }
    if (!mBoarderOn)
        mDynamicPlot.setDrawBorderEnabled(false);
    if (!mRangeLabelOn)
        mDynamicPlot.getLayoutManager().remove(
                mDynamicPlot.getRangeLabelWidget());
    if (!mRangeAxisOn) {
        mDynamicPlot.getGraphWidget().setRangeLabelPaint(null);
        mDynamicPlot.getGraphWidget().setRangeOriginLabelPaint(null);
    }
    if (!mGridOn) {
        mDynamicPlot.getGraphWidget().setGridLinePaint(null);
        mDynamicPlot.getGraphWidget().setDomainOriginLinePaint(null);
        mDynamicPlot.getGraphWidget().setRangeOriginLinePaint(null);
    }
    if (!mTitleOn) 
        mDynamicPlot.getLayoutManager().remove(mDynamicPlot.getTitleWidget());

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