achartEngine. Graphic inside a layout

I'm trying to create an aChartengine graph inside the layout of this image, but I'm not able to do it, the activity is suddenly interrupted..does anyone can help me?

with this code:

private GraphicalView mChartView;

private XYSeries visitsSeries ; private XYMultipleSeriesDataset dataset;

private XYSeriesRenderer visitsRenderer;

private XYMultipleSeriesRenderer renderer;

protected void onResume() { super.onResume();

    if (mChartView == null) {
      LinearLayout layout = (LinearLayout) findViewById(R.id.linearLayout1);
      Context context=getApplication();

      mChartView = (GraphicalView) ChartFactory.getLineChartView(context, dataset, renderer);
      //mChartView = ChartFactory.getLineChartView(context, dataset, renderer);
      layout.addView(mChartView);

    } else {
      mChartView.repaint();
    }
  }

and this XML code:

?xml version="1.0" encoding="utf-8"?

RelativeLayout xmlns:android="http://ift.tt/nIICcg"

android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/degradado"
android:orientation="vertical" >

<LinearLayout
    android:id="@+id/linearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_below="@+id/Drugs"
    android:layout_margin="10dp"
    android:orientation="vertical" >
</LinearLayout>



<Spinner
    android:id="@+id/Drugs"
    android:layout_width="96dp"
    android:layout_height="wrap_content"
    android:layout_alignRight="@+id/patient_data"
    android:layout_below="@+id/patient_data"
    android:layout_marginTop="12dp"
    android:hint="Drugs"
    android:text="Drugs" />

<Button
    android:id="@+id/doctor_data"
    style="?android:attr/buttonStyleSmall"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/Drugs"
    android:layout_alignRight="@+id/linearLayout1"
    android:layout_marginRight="60dp"
    android:text="Doctor Data" />

<Button
    android:id="@+id/patient_data"
    style="?android:attr/buttonStyleSmall"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_marginRight="51dp"
    android:layout_toLeftOf="@+id/Start"
    android:text="Patient Data" />

<ToggleButton
    android:id="@+id/OnOff"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignRight="@+id/doctor_data"
    android:layout_alignTop="@+id/Drugs"
    android:layout_marginRight="14dp"
    android:text="ToggleButton" 
  android:onClick="onToggleClicked"/>