小编Ala*_*ays的帖子

我正在使用以下代码在Android中向图像添加文本：

public Bitmap drawTextToBitmap(Context gContext, Bitmap image, String gText) {

    Resources resources = gContext.getResources();
    float scale = resources.getDisplayMetrics().density;

    android.graphics.Bitmap.Config bitmapConfig =
            image.getConfig();
    // set default bitmap config if none
    if(bitmapConfig == null) {
        bitmapConfig = android.graphics.Bitmap.Config.ARGB_8888;
    }
    // resource bitmaps are imutable,
    // so we need to convert it to mutable one

    Bitmap bitmap = null;

    try{
        bitmap = image.copy(bitmapConfig, true);
        image.recycle();

        Canvas canvas = new Canvas(bitmap);
        // new antialised Paint
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        // text color - …

我正在尝试在 Highchart 注释上添加一个点击事件，但它不起作用..

我尝试在注释对象上设置事件属性，如下所述：

https://www.highcharts.com/products/plugin-registry/single/17/Annotations

事件 mouseup、click、dblclick。回调中的 this 指的是注解对象。

我在这里找不到关于注释事件的任何信息：https : //api.highcharts.com/highcharts/annotations

我做错了什么？

// Data generated from http://www.bikeforums.net/professional-cycling-fans/1113087-2017-tour-de-france-gpx-tcx-files.html
var elevationData = [
    [0.0, 225],
    [0.1, 226],
    [0.2, 228],
    [0.3, 228],
    [0.4, 229],
    [0.5, 229],
    [0.6, 230],
    [0.7, 234],
    [0.8, 235],
    [0.9, 236],
    [1.0, 235],
];

// Now create the chart
Highcharts.chart('container', {

    chart: {
        type: 'area',
        zoomType: 'x',
        panning: true,
        panKey: 'shift',
        scrollablePlotArea: {
            minWidth: 600
        }
    },

    title: {
        text: '2017 Tour de France Stage 8: Dole - …