android - achartEngine. simple example -

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i'm creating simple graphic achartengine, breaks following error activity , don't why:

enter image description here

here activity code, accessed buttom in previous activity.

import org.achartengine.chartfactory;

import org.achartengine.graphicalview;

import org.achartengine.model.xymultipleseriesdataset;

import org.achartengine.renderer.xymultipleseriesrenderer;

import android.content.context;

import android.support.v7.app.actionbaractivity;

import android.widget.linearlayout;

public class startactivity extends actionbaractivity {

private graphicalview mchartview; private xymultipleseriesdataset dataset; private xymultipleseriesrenderer renderer;

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

    if (mchartview == null) {       linearlayout layout = (linearlayout) findviewbyid(r.id.linearlayout1);       context context=getapplication();       mchartview = chartfactory.getbarchartview(context,dataset, renderer);       layout.addview(mchartview);     } else {       mchartview.repaint();     }   } }

and xml code:

relativelayout xmlns:android="http://schemas.android.com/apk/res/android" 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"/>

enter image description here


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