Fix chart crash at route details

OsmAnd/src/net/osmand/plus/mapcontextmenu/other/TrackDetailsMenu.java

@@ -213,10 +213,12 @@ public class TrackDetailsMenu {
 		updateView(main);
 	}
 
-	private TrkSegment getTrackSegment(LineChart chart) {
+	@Nullable
+	private TrkSegment getTrackSegment(@NonNull LineChart chart) {
 		TrkSegment segment = this.segment;
 		if (segment == null) {
-			List<ILineDataSet> ds = chart.getLineData().getDataSets();
+			LineData lineData = chart.getLineData();
+			List<ILineDataSet> ds = lineData != null ? lineData.getDataSets() : null;
 			GpxDisplayItem gpxItem = getGpxItem();
 			if (ds != null && ds.size() > 0 && gpxItem != null) {
 				for (GPXUtilities.Track t : gpxItem.group.getGpx().tracks) {
@@ -236,12 +238,17 @@ public class TrackDetailsMenu {
 		return segment;
 	}
 
+	@Nullable
 	private LatLon getLocationAtPos(LineChart chart, float pos) {
 		LatLon latLon = null;
-		List<ILineDataSet> ds = chart.getLineData().getDataSets();
+		LineData lineData = chart.getLineData();
+		List<ILineDataSet> ds = lineData != null ? lineData.getDataSets() : null;
 		GpxDisplayItem gpxItem = getGpxItem();
 		if (ds != null && ds.size() > 0 && gpxItem != null) {
 			TrkSegment segment = getTrackSegment(chart);
+			if (segment == null) {
+				return null;
+			}
 			OrderedLineDataSet dataSet = (OrderedLineDataSet) ds.get(0);
 			if (gpxItem.chartAxisType == GPXDataSetAxisType.TIME ||
 					gpxItem.chartAxisType == GPXDataSetAxisType.TIMEOFDAY) {
@@ -295,10 +302,12 @@ public class TrackDetailsMenu {
 	private QuadRect getRect(LineChart chart, float startPos, float endPos) {
 		double left = 0, right = 0;
 		double top = 0, bottom = 0;
-		List<ILineDataSet> ds = chart.getLineData().getDataSets();
+		LineData lineData = chart.getLineData();
+		List<ILineDataSet> ds = lineData != null ? lineData.getDataSets() : null;
 		GpxDisplayItem gpxItem = getGpxItem();
 		if (ds != null && ds.size() > 0 && gpxItem != null) {
 			TrkSegment segment = getTrackSegment(chart);
+			if (segment != null) {
 				OrderedLineDataSet dataSet = (OrderedLineDataSet) ds.get(0);
 				if (gpxItem.chartAxisType == GPXDataSetAxisType.TIME || gpxItem.chartAxisType == GPXDataSetAxisType.TIMEOFDAY) {
 					float startTime = startPos * 1000;
@@ -346,13 +355,14 @@ public class TrackDetailsMenu {
 					}
 				}
 			}
+		}
 		return new QuadRect(left, top, right, bottom);
 	}
 
 	private void fitTrackOnMap(LineChart chart, LatLon location, boolean forceFit) {
 		QuadRect rect = getRect(chart, chart.getLowestVisibleX(), chart.getHighestVisibleX());
 		MapActivity mapActivity = getMapActivity();
-		if (mapActivity != null) {
+		if (mapActivity != null && rect.left != 0 && rect.right != 0) {
 			RotatedTileBox tb = mapActivity.getMapView().getCurrentRotatedTileBox().copy();
 			int tileBoxWidthPx = 0;
 			int tileBoxHeightPx = 0;
@@ -454,17 +464,19 @@ public class TrackDetailsMenu {
 
 	private List<LatLon> getXAxisPoints(LineChart chart) {
 		float[] entries = chart.getXAxis().mEntries;
-		float maxXValue = chart.getLineData().getXMax();
-		if (entries.length >= 2) {
+		LineData lineData = chart.getLineData();
+		float maxXValue = lineData != null ? lineData.getXMax() : -1;
+		if (entries.length >= 2 && lineData != null) {
 			float interval = entries[1] - entries[0];
 			if (interval > 0) {
-				xAxisPoints = new ArrayList<>();
+				List<LatLon> xAxisPoints = new ArrayList<>();
 				float currentPointEntry = interval;
 				while (currentPointEntry < maxXValue) {
 					LatLon location = getLocationAtPos(chart, currentPointEntry);
 					xAxisPoints.add(location);
 					currentPointEntry += interval;
 				}
+				this.xAxisPoints = xAxisPoints;
 			}
 		}
 		return xAxisPoints;

OsmAnd/src/net/osmand/plus/myplaces/TrackSegmentFragment.java

@@ -477,7 +477,8 @@ public class TrackSegmentFragment extends OsmAndListFragment implements TrackBit
 
 		private TrkSegment getTrackSegment(LineChart chart) {
 			if (segment == null) {
-				List<ILineDataSet> ds = chart.getLineData().getDataSets();
+				LineData lineData = chart.getLineData();
+				List<ILineDataSet> ds = lineData != null ? lineData.getDataSets() : null;
 				if (ds != null && ds.size() > 0) {
 					for (GPXUtilities.Track t : gpxItem.group.getGpx().tracks) {
 						for (TrkSegment s : t.segments) {
@@ -497,7 +498,8 @@ public class TrackSegmentFragment extends OsmAndListFragment implements TrackBit
 
 		private WptPt getPoint(LineChart chart, float pos) {
 			WptPt wpt = null;
-			List<ILineDataSet> ds = chart.getLineData().getDataSets();
+			LineData lineData = chart.getLineData();
+			List<ILineDataSet> ds = lineData != null ? lineData.getDataSets() : null;
 			if (ds != null && ds.size() > 0) {
 				TrkSegment segment = getTrackSegment(chart);
 				OrderedLineDataSet dataSet = (OrderedLineDataSet) ds.get(0);