Created
July 5, 2019 11:55
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Kotlin Google Charts API easy and basic implementation
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| package com.activity | |
| import android.os.Bundle | |
| import kotlinx.android.synthetic.main.activity_statistiques.* | |
| class StatsActivity : BaseActivity() { | |
| override fun onCreate(savedInstanceState: Bundle?) { | |
| super.onCreate(savedInstanceState) | |
| setContentView(R.layout.activity_statistiques) | |
| val content = ("<html>" | |
| + " <head>" | |
| + " <script type=\"text/javascript\" src=\"https://www.gstatic.com/charts/loader.js\"></script>" | |
| + " <script type=\"text/javascript\">" | |
| + " google.load(\"visualization\", \"1\", {packages:[\"corechart\"]});" | |
| + " google.setOnLoadCallback(drawChart);" | |
| + " function drawChart() {" | |
| + " var data = google.visualization.arrayToDataTable([" | |
| + " ['Year', 'Sales', 'Expenses']," | |
| + " ['2010', 1000, 400]," | |
| + " ['2011', 1170, 460]," | |
| + " ['2012', 660, 1120]," | |
| + " ['2013', 1030, 540]" | |
| + " ]);" | |
| + " var options = {" | |
| + " title: 'Truiton Performance'," | |
| + " hAxis: {title: 'Year', titleTextStyle: {color: 'red'}}" | |
| + " };" | |
| + " var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));" | |
| + " chart.draw(data, options);" | |
| + " }" | |
| + " </script>" | |
| + " </head>" | |
| + " <body>" | |
| + " <div id=\"chart_div\" style=\"width: " + webView1.width + "px; height: " + webView1.height + "px;\"></div>" | |
| + " <img style=\"padding: 0; margin: 0 0 0 330px; display: block;\" src=\"truiton.png\"/>" | |
| + " </body>" + "</html>") | |
| val webSettings = webView1.settings | |
| webSettings.javaScriptEnabled = true | |
| webView1.requestFocusFromTouch() | |
| webView1.loadDataWithBaseURL("file:///android_asset/", content, "text/html", "utf-8", null) | |
| } | |
| } |
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This is interesting, but the hard part is that most of the use cases for this the Data would not be fixed in the code, but usually requested at runtime, so you need a way to "inject" that data on the JS part and sync everything. That's the harder part.