用android的webview加载echarts的地图模拟迁徙效果，发现lines的尾迹变成了点状，而不是拖尾的效果，请问是什么原因？

[NicoleJJ]

One-line summary [问题简述]

如题；
附加：
html的option 完全和Echart官网一致，echarts.min.js和china.js都是官网下的；
同样的html文件，在web端浏览器查看，尾迹效果正常，但是，在android端用webview加载后显示出来后，尾迹就变成点状了；
谢谢！

Version & Environment [版本及环境]

• ECharts version [ECharts 版本]: ECharts 3.0.0.2
• Browser version [浏览器类型和版本]: Firefox 59.0.2
• OS Version [操作系统类型和版本]: android 6.0， 4.0

Expected behaviour [期望结果]

用android加载应该和web端查看的尾迹效果一致；

ECharts option [ECharts配置项]

option = {
backgroundColor: '#404a59',
    title : {
        text: '模拟迁徙',
        subtext: '数据纯属虚构',
        left: 'center',
        textStyle : {
            color: '#fff'
        }
    },
    tooltip : {
        trigger: 'item'
    },
    legend: {
        orient: 'vertical',
        top: 'bottom',
        left: 'right',
        data:['北京 Top10', '上海 Top10', '广州 Top10'],
        textStyle: {
            color: '#fff'
        },
        selectedMode: 'single'
    },
    geo: {
        map: 'china',
        label: {
            emphasis: {
                show: false
            }
        },
        roam: true,
        itemStyle: {
            normal: {
                areaColor: '#323c48',
                borderColor: '#404a59'
            },
            emphasis: {
                areaColor: '#2a333d'
            }
        }
    },
    series: series
}

Other comments [其他信息]

echart官网效果：

android中webview加载后的效果：

在android端就是简单的用webview加载html；------------------------------------
mWebView = (WebView) findViewById(R.id.echart_webView);
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
webSettings.setSupportZoom(true);
webSettings.setDisplayZoomControls(true);
mWebView.setBackgroundColor(0); // 设置背景色
mWebView.loadUrl("file:///android_asset/js/test.html");

html文件完整内容如下：----------------------------------------------------------

<title>ECharts</title>

<script src="file:///android_asset/js/echarts.min.js"></script>
<script src="file:///android_asset/js/china.js"></script>
   <style type="text/css">  
        *{  
            margin: 0;  
            padding: 0;  
        }  
        html,body{  
            height: 100%;  
            width: 100%;  
        }  
    </style>  </head>

<script type="text/javascript"> var geoCoordMap = { '上海': [121.4648,31.2891], '东莞': [113.8953,22.901], '东营': [118.7073,37.5513], '中山': [113.4229,22.478], '临汾': [111.4783,36.1615], '临沂': [118.3118,35.2936], '丹东': [124.541,40.4242], '丽水': [119.5642,28.1854], '乌鲁木齐': [87.9236,43.5883], '佛山': [112.8955,23.1097], '保定': [115.0488,39.0948], '兰州': [103.5901,36.3043], '包头': [110.3467,41.4899], '北京': [116.4551,40.2539], '北海': [109.314,21.6211], '南京': [118.8062,31.9208], '南宁': [108.479,23.1152], '南昌': [116.0046,28.6633], '南通': [121.1023,32.1625], '厦门': [118.1689,24.6478], '台州': [121.1353,28.6688], '合肥': [117.29,32.0581], '呼和浩特': [111.4124,40.4901], '咸阳': [108.4131,34.8706], '哈尔滨': [127.9688,45.368], '唐山': [118.4766,39.6826], '嘉兴': [120.9155,30.6354], '大同': [113.7854,39.8035], '大连': [122.2229,39.4409], '天津': [117.4219,39.4189], '太原': [112.3352,37.9413], '威海': [121.9482,37.1393], '宁波': [121.5967,29.6466], '宝鸡': [107.1826,34.3433], '宿迁': [118.5535,33.7775], '常州': [119.4543,31.5582], '广州': [113.5107,23.2196], '廊坊': [116.521,39.0509], '延安': [109.1052,36.4252], '张家口': [115.1477,40.8527], '徐州': [117.5208,34.3268], '德州': [116.6858,37.2107], '惠州': [114.6204,23.1647], '成都': [103.9526,30.7617], '扬州': [119.4653,32.8162], '承德': [117.5757,41.4075], '拉萨': [91.1865,30.1465], '无锡': [120.3442,31.5527], '日照': [119.2786,35.5023], '昆明': [102.9199,25.4663], '杭州': [119.5313,29.8773], '枣庄': [117.323,34.8926], '柳州': [109.3799,24.9774], '株洲': [113.5327,27.0319], '武汉': [114.3896,30.6628], '汕头': [117.1692,23.3405], '江门': [112.6318,22.1484], '沈阳': [123.1238,42.1216], '沧州': [116.8286,38.2104], '河源': [114.917,23.9722], '泉州': [118.3228,25.1147], '泰安': [117.0264,36.0516], '泰州': [120.0586,32.5525], '济南': [117.1582,36.8701], '济宁': [116.8286,35.3375], '海口': [110.3893,19.8516], '淄博': [118.0371,36.6064], '淮安': [118.927,33.4039], '深圳': [114.5435,22.5439], '清远': [112.9175,24.3292], '温州': [120.498,27.8119], '渭南': [109.7864,35.0299], '湖州': [119.8608,30.7782], '湘潭': [112.5439,27.7075], '滨州': [117.8174,37.4963], '潍坊': [119.0918,36.524], '烟台': [120.7397,37.5128], '玉溪': [101.9312,23.8898], '珠海': [113.7305,22.1155], '盐城': [120.2234,33.5577], '盘锦': [121.9482,41.0449], '石家庄': [114.4995,38.1006], '福州': [119.4543,25.9222], '秦皇岛': [119.2126,40.0232], '绍兴': [120.564,29.7565], '聊城': [115.9167,36.4032], '肇庆': [112.1265,23.5822], '舟山': [122.2559,30.2234], '苏州': [120.6519,31.3989], '莱芜': [117.6526,36.2714], '菏泽': [115.6201,35.2057], '营口': [122.4316,40.4297], '葫芦岛': [120.1575,40.578], '衡水': [115.8838,37.7161], '衢州': [118.6853,28.8666], '西宁': [101.4038,36.8207], '西安': [109.1162,34.2004], '贵阳': [106.6992,26.7682], '连云港': [119.1248,34.552], '邢台': [114.8071,37.2821], '邯郸': [114.4775,36.535], '郑州': [113.4668,34.6234], '鄂尔多斯': [108.9734,39.2487], '重庆': [107.7539,30.1904], '金华': [120.0037,29.1028], '铜川': [109.0393,35.1947], '银川': [106.3586,38.1775], '镇江': [119.4763,31.9702], '长春': [125.8154,44.2584], '长沙': [113.0823,28.2568], '长治': [112.8625,36.4746], '阳泉': [113.4778,38.0951], '青岛': [120.4651,36.3373], '韶关': [113.7964,24.7028] }; var BJData = [ [{name:'北京'}, {name:'上海',value:95}], [{name:'北京'}, {name:'广州',value:90}], [{name:'北京'}, {name:'大连',value:80}], [{name:'北京'}, {name:'南宁',value:70}], [{name:'北京'}, {name:'南昌',value:60}], [{name:'北京'}, {name:'拉萨',value:50}], [{name:'北京'}, {name:'长春',value:40}], [{name:'北京'}, {name:'包头',value:30}], [{name:'北京'}, {name:'重庆',value:20}], [{name:'北京'}, {name:'常州',value:10}] ]; var SHData = [ [{name:'上海'},{name:'包头',value:95}], [{name:'上海'},{name:'昆明',value:90}], [{name:'上海'},{name:'广州',value:80}], [{name:'上海'},{name:'郑州',value:70}], [{name:'上海'},{name:'长春',value:60}], [{name:'上海'},{name:'重庆',value:50}], [{name:'上海'},{name:'长沙',value:40}], [{name:'上海'},{name:'北京',value:30}], [{name:'上海'},{name:'丹东',value:20}], [{name:'上海'},{name:'大连',value:10}] ]; var GZData = [ [{name:'广州'},{name:'福州',value:95}], [{name:'广州'},{name:'太原',value:90}], [{name:'广州'},{name:'长春',value:80}], [{name:'广州'},{name:'重庆',value:70}], [{name:'广州'},{name:'西安',value:60}], [{name:'广州'},{name:'成都',value:50}], [{name:'广州'},{name:'常州',value:40}], [{name:'广州'},{name:'北京',value:30}], [{name:'广州'},{name:'北海',value:20}], [{name:'广州'},{name:'海口',value:10}] ]; var planePath = 'path://M1705.06,1318.313v-89.254l-319.9-221.799l0.073-208.063c0.521-84.662-26.629-121.796-63.961-121.491c-37.332-0.305-64.482,36.829-63.961,121.491l0.073,208.063l-319.9,221.799v89.254l330.343-157.288l12.238,241.308l-134.449,92.931l0.531,42.034l175.125-42.917l175.125,42.917l0.531-42.034l-134.449-92.931l12.238-241.308L1705.06,1318.313z'; var convertData = function (data) { var res = []; for (var i = 0; i < data.length; i++) { var dataItem = data[i]; var toCoord = geoCoordMap[dataItem[0].name]; var fromCoord = geoCoordMap[dataItem[1].name]; if (fromCoord && toCoord) { res.push({ fromName: dataItem[0].name, toName: dataItem[1].name, coords: [fromCoord, toCoord] }); } } return res; }; var color = ['#a6c84c', '#ffa022', '#46bee9']; var series = []; [['北京', BJData], ['上海', SHData], ['广州', GZData]].forEach(function (item, i) { series.push({ name: item[0] + ' Top10', type: 'lines', zlevel: 1, effect: { show: true, period: 3, trailLength: 0.7, color: '#fff', symbolSize: 3 }, animation:false, lineStyle: { normal: { color: color[i], width: 0, curveness: 0.2 } }, data: convertData(item[1]) }, { name: item[0] + ' Top10', type: 'lines', zlevel: 2, symbol: ['none', 'arrow'], symbolSize: 10, effect: { show: true, period: 3, trailLength: 0, symbol: planePath, symbolSize: 15 }, lineStyle: { normal: { color: color[i], width: 1, opacity: 0.6, curveness: 0.2 } }, data: convertData(item[1]) }, { name: item[0] + ' Top10', type: 'effectScatter', coordinateSystem: 'geo', zlevel: 2, rippleEffect: { brushType: 'stroke' }, label: { normal: { show: true, position: 'right', formatter: '{b}' } }, symbolSize: function (val) { return val[2] / 8; }, itemStyle: { normal: { color: color[i] } }, data: item[1].map(function (dataItem) { return { name: dataItem[1].name, value: geoCoordMap[dataItem[1].name].concat([dataItem[1].value]) }; }) }); }); var option = { backgroundColor: '#404a59', title : { text: '模拟迁徙', subtext: '数据纯属虚构', left: 'center', textStyle : { color: '#fff' } }, tooltip : { trigger: 'item' }, legend: { orient: 'vertical', top: 'bottom', left: 'right', data:['北京 Top10', '上海 Top10', '广州 Top10'], textStyle: { color: '#fff' }, selectedMode: 'single' }, geo: { map: 'china', label: { emphasis: { show: false } }, roam: true, itemStyle: { normal: { areaColor: '#323c48', borderColor: '#404a59' }, emphasis: { areaColor: '#2a333d' } } }, series: series }; var myChart = echarts.init(document.getElementById('chart_common')); myChart.setOption(option, true); </script> -------------

[zhang6685979]

问题解决了么？我这也出现了这样的问题

[alex2wong]

line trail 绘制方式目前已经优化，移动端效果应该有所提升。请在master 最新代码中测试，或者等下一个版本查验。如果有任何问题，可以reopen issue