I've tried a couple of things but no luck unfortunately.
Firstly:
var chartBuilder = new Chart_Range_Hour_Droid(Application.Context, range); // sets up builder
chartBuilder._chart.DrawingCacheEnabled = true;
chartBuilder.build(); // builds chart i.e. axis and line w/ annotation
chart._chart.Measure(View.MeasureSpec.MakeMeasureSpec(400, MeasureSpecMode.Exactly), View.MeasureSpec.MakeMeasureSpec(400, MeasureSpecMode.Exactly));
chart._chart.Layout(0, 0, 400, 400);
Android.Graphics.Bitmap bitmap = null;
using (bitmap = chart._chart.DrawingCache)
{
try
{
widgetView.SetImageViewBitmap(Resource.Id.chart, bitmap);
}
finally
{
chart._chart.DrawingCacheEnabled = false;
}
}
This actually doesn't draw anything. Perhaps I misunderstood the instructions?
Also:
using (bitmap = chart._chart.DrawingCache)
{
try
{
bitmap = Helper_Widget.getBitmapFromView(chart._chart);
widgetView.SetImageViewBitmap(Resource.Id.chart, bitmap);
}
finally
{
chart._chart.DrawingCacheEnabled = false;
}
}
Draws the chart just like before i.e. the line and x-axis labels, but not the annotations.
For reference, this is the chart control I'm updating the bitmap of:
<!-- Chart -->
<LinearLayout
android:id="@+id/data"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/summary">
<ImageView
android:id="@+id/chart"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
