Mpandroidchart: java.lang.NegativeArraySizeException: -2

[Nima9Faraji]

hello guys
i am following Getting Start and my code is :
Java :

`
here is my code :

    ArrayList<Entry> entries = new ArrayList<>();
    entries.add(new Entry(4f, 0));
    entries.add(new Entry(8f, 1));
    entries.add(new Entry(6f, 2));
    entries.add(new Entry(2f, 3));
    entries.add(new Entry(18f, 4));
    entries.add(new Entry(9f, 5));

    ArrayList<String> labels = new ArrayList<String>();
    labels.add("1");
    labels.add("2");
    labels.add("3");
    labels.add("4");

    LineDataSet dataSet = new LineDataSet(entries, "Label");

    LineData lineData = new LineData(dataSet);
    chartUser.setData(lineData);
    chartUser.invalidate();

`

XML :
<com.github.mikephil.charting.charts.LineChart android:id="@+id/chart_user" android:layout_width="match_parent" android:layout_height="200dp"/>

i have Exception with this simple code ! and
the Exception Logcat is :

java.lang.NegativeArraySizeException: -2
at com.github.mikephil.charting.utils.Transformer.generateTransformedValuesLine(Transformer.java:178)
at com.github.mikephil.charting.renderer.LineChartRenderer.drawValues(LineChartRenderer.java:547)
at com.github.mikephil.charting.charts.BarLineChartBase.onDraw(BarLineChartBase.java:264)
at android.view.View.draw(View.java:17071)
at android.view.View.updateDisplayListIfDirty(View.java:16053)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.draw(View.java:17074)
at android.view.View.updateDisplayListIfDirty(View.java:16053)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.updateDisplayListIfDirty(View.java:16048)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.support.design.widget.CoordinatorLayout.drawChild(CoordinatorLayout.java:1234)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.updateDisplayListIfDirty(View.java:16048)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.support.v4.widget.DrawerLayout.drawChild(DrawerLayout.java:1367)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.updateDisplayListIfDirty(View.java:16048)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.updateDisplayListIfDirty(View.java:16048)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.updateDisplayListIfDirty(View.java:16048)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.updateDisplayListIfDirty(View.java:16048)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.updateDisplayListIfDirty(View.java:16048)
at android.view.View.draw(View.java:16837)
at android.view.ViewGroup.drawChild(ViewGroup.java:3764)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3550)
at android.view.View.draw(View.java:17074)
at com.android.internal.policy.DecorView.draw(DecorView.java:751)
at android.view.View.updateDisplayListIfDirty(View.java:16053)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:656)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:662)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:770)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2796)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2604)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2211)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1246)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6301)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)
at android.view.Choreographer.doCallbacks(Choreographer.java:683)
at android.view.Choreographer.doFrame(Choreographer.java:619)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
01-08 20:19:12.262 6010-6010/ir.ninesoft.fitshow E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

anyone can help ?

[bkraszewski]

@Nima9Faraji Its required to have dataset sorted by x axis. Note that when you create new entry its actually Entry(x, y). Try switching constructor params and should be fine. Right now values 0, 1, 2 are on Y axis instead of X

[Silic0nS0ldier]

Just hit this and @bkraszewski's suggestion worked. (kinda obvious why it errored out when you think about it, though the specific exception that ends up getting thrown leaves a lot to be desired)

[almic]

lol