CODEWITHSUNDEEP
androidbar-chartmpandroidchart
Stark
Stark

Reputation: 85

Error when try add value on Array of BarEntry

I have a little problem with MPAndroidChart. In the code above i get an error which are make me mad for 3 days. Im getting an error when i try to add a entry to a barEntry array and i don no why.

private void retrive(){
    NoSQL.with(this).using(Float.class)
            .bucketId("MyMarket")
            .entityId("Chart")
            .retrieve(new RetrievalCallback<Float>() {
                @Override
                public void retrievedResults(List<NoSQLEntity<Float>> noSQLEntities) {
                    for(int i = 0; i < noSQLEntities.size(); i++) {
                        float item = noSQLEntities.get(i).getData();
                        BarEntry entry = new BarEntry(i, item);
                        barEntries.add(entry);

                    }
                }
            });

    BarDataSet barDataSet = new BarDataSet(barEntries, "Compras");

    BarData theData = new BarData(barDataSet);
    theData.setBarWidth(0.9f);
    barChart.setData(theData);

    barChart.setTouchEnabled(true);
    barChart.setDragEnabled(true);
    barChart.setScaleEnabled(true);
    barChart.setDescription("");
    barChart.animateY(2700);
    barChart.setData(theData);
    barChart.setFitBars(true);

    XAxis xAxis = barChart.getXAxis();
    xAxis.setDrawGridLines(false);

    YAxis right = barChart.getAxisRight();
    right.setDrawGridLines(false);

    YAxis left = barChart.getAxisLeft();
    left.setDrawGridLines(false);

    barChart.invalidate();
}

In this line: 

BarEntry entry = new BarEntry(i, item);

I have sure the value is added, but the program keep give me this error:

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.stark.mymarket, PID: 6404
              java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
                  at com.github.mikephil.charting.buffer.BarBuffer.addBar(BarBuffer.java:37)
                  at com.github.mikephil.charting.buffer.BarBuffer.feed(BarBuffer.java:80)
                  at com.github.mikephil.charting.renderer.BarChartRenderer.drawDataSet(BarChartRenderer.java:103)
                  at com.github.mikephil.charting.renderer.BarChartRenderer.drawData(BarChartRenderer.java:78)
                  at com.github.mikephil.charting.charts.BarLineChartBase.onDraw(BarLineChartBase.java:243)
                  at android.view.View.draw(View.java:16178)
                  at android.view.View.updateDisplayListIfDirty(View.java:15174)
                  at android.view.View.draw(View.java:15948)
                  at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
                  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
                  at android.view.View.updateDisplayListIfDirty(View.java:15169)
                  at android.view.View.draw(View.java:15948)
                  at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
                  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
                  at android.view.View.updateDisplayListIfDirty(View.java:15169)
                  at android.view.View.draw(View.java:15948)
                  at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
                  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
                  at android.view.View.updateDisplayListIfDirty(View.java:15169)
                  at android.view.View.draw(View.java:15948)
                  at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
                  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
                  at android.view.View.updateDisplayListIfDirty(View.java:15169)
                  at android.view.View.draw(View.java:15948)
                  at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
                  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
                  at android.view.View.updateDisplayListIfDirty(View.java:15169)
                  at android.view.View.draw(View.java:15948)
                  at android.view.ViewGroup.drawChild(ViewGroup.java:3609)
                  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3399)
                  at android.view.View.draw(View.java:16181)
                  at com.android.internal.policy.PhoneWindow$DecorView.draw(PhoneWindow.java:2690)
                  at android.view.View.updateDisplayListIfDirty(View.java:15174)
                  at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:281)
                  at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:287)
                  at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:322)
                  at android.view.ViewRootImpl.draw(ViewRootImpl.java:2615)
                  at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2434)
                  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2067)
                  at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
                  at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
                  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
                  at android.view.Choreographer.doCallbacks(Choreographer.java:670)
                  at android.view.Choreographer.doFrame(Choreographer.java:606)
                  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
                  at android.os.Handler.handleCallback(Handler.java:739)
                  at android.os.Handler.dispatchMessage(Handler.java:95)
                  at android.os.Looper.loop(Looper.java:148)
                  at android.app.ActivityThread.main(ActivityThread.java:5417)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Upvotes: 2

Views: 494

Answers (1)

Francisco Romero
Francisco Romero

Reputation: 13199

You should look at your console log. Focusing on the line in which it says to you what kind of error you are getting:

java.lang.ArrayIndexOutOfBoundsException: length=0; index=0

which means that you are trying to access to a wrong position of your list, noSQLEntities.

You are getting the error on this line: 

BarEntry entry = new BarEntry(i, item);

but I am almost secure that your error it is really on this other line (which is used on the line above):

float item = noSQLEntities.get(i).getData();

It seems that you are not initializing your noSQLEntities list with values so you are trying to access to a position of that list that does not exist.

Make sure that your noSQLEntities list have values. You can use debug mode (if you are using Android Studio) or logs to see the values of your noSQLEntities list in your console.

Upvotes: 1

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