Recycling View Android Plot Becomes Gray After Scrolling

I got the following Problem. When Including Android-XYPlot into Recycle-View, the Plots are not displayed after Scrolling Elements out of the Screen. It seems to me if Androidplot

Solution 1:

It looks like you're doing some stuff in the constructor of your ViewHolder that you probably shouldnt. In particular:

InitDiagramm();
addSampleData();
mPlot.redraw();

RecyclerView only contains a few View instances that are dynamically bound to your model data as the user scrolls, which means that you need to set the model data etc. every time the view is bound. This means that addSampleData and plot.Redraw should be done in onBindView.

You have the logic that actually adds the series data mixed between InitDiagramm and addSampleData. I'd suggest refactoring that a bit so that your plot style setup is separate from the code that actually sets data on the plot. At the very least, the addSeries call in InitDiagram should happen every bind, after your invocation of plot.clear but before your invocation of plot.redraw.

Solution 2:

The Problem was that I used the background Thread, after removing the Problem was solved

Before:

<com.androidplot.xy.XYPlot
                android:id="@+id/mPlot"
                style="@style/APDefacto.Light"
                androidplot.renderMode="use_background_thread"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:visibility="visible"
                ap:lineLabels="left"
                android:minHeight="100dp"/>

After:

<com.androidplot.xy.XYPlot
                android:id="@+id/mPlot"
                style="@style/APDefacto.Light"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:visibility="visible"
                ap:lineLabels="left"
                android:minHeight="100dp"/>