Androidグラフ描画ライブラリAChartEngine：大きいレイアウトで表示時にグラフが消える問題
Android グラフ描画ライブラリ AchartEngine の CubicLineChart を使用し、横長の曲線グラフの一覧を表示する画面を作成しようとしています。
まず TemplatureChart.class の execute メソッドで GraphicalView を返すように作成します。
【グラフのView作成クラス】
public class TemplatureChart {
public GraphicalView execute(Context context) {
String[] titles = new String[] { "Sales for 2008", "Sales for 2007",
"Difference between 2008 and 2007 sales" };
List<double[]> values = new ArrayList<double[]>();
values.add(new double[] { 14230, 12300, 14240, 15244, 14900, 12200, 11030, 12000, 12500, 15500,
14600, 15000 });
values.add(new double[] { 10230, 10900, 11240, 12540, 13500, 14200, 12530, 11200, 10500, 12500,
11600, 13500 });
int length = values.get(0).length;
double[] diff = new double[length];
for (int i = 0; i < length; i++) {
diff[i] = values.get(0)[i] - values.get(1)[i];
}
values.add(diff);
int[] colors = new int[] { Color.BLUE, Color.CYAN, Color.GREEN };
PointStyle[] styles = new PointStyle[] { PointStyle.POINT, PointStyle.POINT, PointStyle.POINT };
XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);
setChartSettings(renderer, "Monthly sales in the last 2 years", "Month", "Units sold", 0.75,
12.25, -5000, 19000, Color.GRAY, Color.LTGRAY);
renderer.setXLabels(12);
renderer.setYLabels(10);
renderer.setChartTitleTextSize(20);
renderer.setTextTypeface("sans_serif", Typeface.BOLD);
renderer.setLabelsTextSize(14f);
renderer.setAxisTitleTextSize(15);
renderer.setLegendTextSize(15);
length = renderer.getSeriesRendererCount();
for (int i = 0; i < length; i++) {
XYSeriesRenderer seriesRenderer = (XYSeriesRenderer) renderer.getSeriesRendererAt(i);
if (i == length - 1) {
FillOutsideLine fill = new FillOutsideLine(FillOutsideLine.Type.BOUNDS_ALL);
fill.setColor(Color.GREEN);
seriesRenderer.addFillOutsideLine(fill);
}
seriesRenderer.setLineWidth(2.5f);
seriesRenderer.setDisplayChartValues(true);
seriesRenderer.setChartValuesTextSize(10f);
}
return ChartFactory.getCubeLineChartView(context, buildBarDataset(titles, values), renderer,
0.5f);
}
/**
* Builds a bar multiple series dataset using the provided values.
*
* @param titles the series titles
* @param values the values
* @return the XY multiple bar dataset
*/
protected XYMultipleSeriesDataset buildBarDataset(String[] titles, List<double[]> values) {
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
int length = titles.length;
for (int i = 0; i < length; i++) {
CategorySeries series = new CategorySeries(titles[i]);
double[] v = values.get(i);
int seriesLength = v.length;
for (int k = 0; k < seriesLength; k++) {
series.add(v[k]);
}
dataset.addSeries(series.toXYSeries());
}
return dataset;
}
public static XYMultipleSeriesRenderer getRenderer(){
XYSeriesRenderer renderer1 = new XYSeriesRenderer(); //個別のグラフ
renderer1.setColor(Color.rgb(51,181,229)); //グラフの色
renderer1.setLineWidth(2); //グラフの幅
renderer1.setPointStyle(PointStyle.SQUARE); //ポイント設定
renderer1.setPointStrokeWidth(8);
renderer1.setFillPoints(true);
XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer(); //グラフ全体
mRenderer.setApplyBackgroundColor(true); //背景色変更
mRenderer.setBackgroundColor(Color.BLACK);
mRenderer.setMarginsColor(Color.argb(0x00, 0x01, 0x01, 0x01)); //余白色変更
mRenderer.setPanEnabled(true); //グラフを固定
mRenderer.setZoomEnabled(false); //ズームを不可に
mRenderer.setShowLegend(false); //凡例非表示
mRenderer.setAxesColor(Color.GRAY); //軸の色
mRenderer.setShowGrid(true); //グリッド表示
mRenderer.setGridColor(Color.parseColor("lightgray")); //グリッドの色
mRenderer.setXAxisMin(0);
//mRenderer.setXAxisMax(23); //表示範囲
//mRenderer.setLabelsTextSize(24); //ラベル文字サイズ
// mRenderer.setXLabels(0); //X軸ラベル非表示
//Y軸ラベル設定
mRenderer.setYLabels(5);//Y軸グリッドの密度？
mRenderer.setYLabelsColor(0, Color.GRAY);
mRenderer.setYLabelsPadding(20);
mRenderer.setYLabelsVerticalPadding(-8);
mRenderer.addSeriesRenderer(renderer1);
return mRenderer;
}
/**
* Builds an XY multiple dataset using the provided values.
*
* @param titles the series titles
* @param xValues the values for the X axis
* @param yValues the values for the Y axis
* @return the XY multiple dataset
*/
protected XYMultipleSeriesDataset buildDataset(String[] titles, List<double[]> xValues,
List<double[]> yValues) {
XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
addXYSeries(dataset, titles, xValues, yValues, 0);
return dataset;
}
public void addXYSeries(XYMultipleSeriesDataset dataset, String[] titles, List<double[]> xValues,
List<double[]> yValues, int scale) {
int length = titles.length;
for (int i = 0; i < length; i++) {
XYSeries series = new XYSeries(titles[i], scale);
double[] xV = xValues.get(i);
double[] yV = yValues.get(i);
int seriesLength = xV.length;
for (int k = 0; k < seriesLength; k++) {
series.add(xV[k], yV[k]);
}
dataset.addSeries(series);
}
}
/**
* Builds an XY multiple series renderer.
*
* @param colors the series rendering colors
* @param styles the series point styles
* @return the XY multiple series renderers
*/
protected XYMultipleSeriesRenderer buildRenderer(int[] colors, PointStyle[] styles) {
XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
setRenderer(renderer, colors, styles);
return renderer;
}
protected void setRenderer(XYMultipleSeriesRenderer renderer, int[] colors, PointStyle[] styles) {
renderer.setAxisTitleTextSize(16);
renderer.setChartTitleTextSize(20);
renderer.setLabelsTextSize(15);
renderer.setLegendTextSize(15);
renderer.setPointSize(5f);
renderer.setMargins(new int[] { 20, 30, 15, 20 });
int length = colors.length;
for (int i = 0; i < length; i++) {
XYSeriesRenderer r = new XYSeriesRenderer();
r.setColor(colors[i]);
r.setPointStyle(styles[i]);
renderer.addSeriesRenderer(r);
}
}
/**
* Sets a few of the series renderer settings.
*
* @param renderer the renderer to set the properties to
* @param title the chart title
* @param xTitle the title for the X axis
* @param yTitle the title for the Y axis
* @param xMin the minimum value on the X axis
* @param xMax the maximum value on the X axis
* @param yMin the minimum value on the Y axis
* @param yMax the maximum value on the Y axis
* @param axesColor the axes color
* @param labelsColor the labels color
*/
protected void setChartSettings(XYMultipleSeriesRenderer renderer, String title, String xTitle,
String yTitle, double xMin, double xMax, double yMin, double yMax, int axesColor,
int labelsColor) {
renderer.setChartTitle(title);
renderer.setXTitle(xTitle);
renderer.setYTitle(yTitle);
renderer.setXAxisMin(xMin);
renderer.setXAxisMax(xMax);
renderer.setYAxisMin(yMin);
renderer.setYAxisMax(yMax);
renderer.setAxesColor(axesColor);
renderer.setLabelsColor(labelsColor);
}
}
次に下記のような XML ファイルを作成します。
【レイアウトxmlファイル】
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.templature.MainActivity$PlaceholderFragment" >
<HorizontalScrollView
android:id="@+id/horizontalScrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/graph1"
android:layout_width="1000dp"
android:layout_height="100dp"
android:orientation="vertical" >
</LinearLayout>
<LinearLayout
android:id="@+id/graph2"
android:layout_width="2000dp"
android:layout_height="100dp"
android:orientation="vertical" >
</LinearLayout>
<LinearLayout
android:id="@+id/graph3"
android:layout_width="3000dp"
android:layout_height="100dp"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
上記のレイアウトにexecuteで設定したidがgraph1, graph2、graph3のLinearLayoutにaddViewします。
【addView部分】
LinearLayout graph1 = (LinearLayout) rootView.findViewById(R.id.graph1);
LinearLayout graph2 = (LinearLayout) rootView.findViewById(R.id.graph2);
LinearLayout graph3 = (LinearLayout) rootView.findViewById(R.id.graph3);
TemplatureChart chart1 = new TemplatureChart();
GraphicalView chartA = chart1.execute(getActivity());
graph1.addView(chartA);
TemplatureChart chart2 = new TemplatureChart();
GraphicalView chartB = chart2.execute(getActivity());
graph2.addView(chartB);
TemplatureChart chart3 = new TemplatureChart();
GraphicalView chartC = chart3.execute(getActivity());
graph3.addView(chartC);
実行結果は下記のようになります。
上記のように大きなレイアウト入れたビューのグラフが消えてしまいます。
この問題の原因と解決方法をご存知の方は御教授いただければ幸いです。
よろしくお願いします。