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我正在從數據庫中取出股票的日期,其中公司的股票歷史記錄保留在數據庫列中。每天的數據以{date,stock_value}的格式顯示,並由其他日期的「\ n」分隔。Android GraphView僅在X軸上呈現一個日期
String[] allStocks = history.split("\n");
String[] singleStock;
ArrayList<DataPoint> points = new ArrayList<>();
GraphView graph = (GraphView) findViewById(R.id.graph);
for(int i=0; i<3; i++)
{
singleStock = allStocks[i].split(",");
Date date = new Date(Long.parseLong(singleStock[0]));
System.out.println(date);
points.add(new DataPoint(new Date(Long.parseLong(singleStock[0])), Float.parseFloat(singleStock[1])));
}
DataPoint[] dbPoint = points.toArray(new DataPoint[points.size()]);
System.out.println(points);
LineGraphSeries<DataPoint> series = new LineGraphSeries<DataPoint>(dbPoint);
graph.addSeries(series);
graph.getGridLabelRenderer().setLabelFormatter(new DateAsXAxisLabelFormatter(this));
graph.getGridLabelRenderer().setNumHorizontalLabels(2);
// set manual x bounds to have nice steps
graph.getViewport().setXAxisBoundsManual(true);
// as we use dates as labels, the human rounding to nice readable numbers
// is not necessary
graph.getGridLabelRenderer().setHumanRounding(false);
以下是點的可變內容: [[1.4887386E12/117.55000305175781],[1.4881338E12/118.62000274658203],[1.4876154E12/118.79000091552734]]
該圖顯示爲: The graph appears only for one date
這是我的圖表中的XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<com.jjoe64.graphview.GraphView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/graph" />
</LinearLayout>
只有一個日期出現在圖表。當我嘗試來自'GraphView'的示例代碼的日期時,一切都按預期工作。請讓我知道我的代碼是否有缺陷。
不工作。同樣的問題仍然存在。 –