Cannot cast from View to XYPlot - eclipse

Question

Im getting error at the bold line inside XYPlot.java class.
XYPlot.java :
package com.arise.plotme;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import com.androidplot.xy.SimpleXYSeries;
import com.androidplot.series.XYSeries;
import com.androidplot.xy.*;
import com.arise.plotme.R;
import java.util.Arrays;
/**
* The simplest possible example of using AndroidPlot to plot some data.
*/
public class XYPlot extends Activity
{
private XYPlot mySimpleXYPlot;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.plot_xml);
// initialize our XYPlot reference:
**mySimpleXYPlot = (XYPlot) findViewById(R.id.mySimpleXYPlot);**
// Create a couple arrays of y-values to plot:
Number[] series1Numbers = {12,2,4,3};// --x -lat
// Number[] series2Numbers = {1,2,10,3};
Number[] series3Numbers = {2,12,-2,7};// --y -lon
// Turn the above arrays into XYSeries':
XYSeries series1 = new SimpleXYSeries(
Arrays.asList(series1Numbers), // --x // SimpleXYSeries takes a List so turn our array into a List
//SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, // Y_VALS_ONLY means use the element index as the x value
Arrays.asList(series3Numbers),//--y
"Series1"); // Set the display title of the series
// same as above
// XYSeries series2 = new SimpleXYSeries(Arrays.asList(series2Numbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, "Series2");
// Create a formatter to use for drawing a series using LineAndPointRenderer:
LineAndPointFormatter series1Format = new LineAndPointFormatter(
Color.rgb(0, 200, 0), // line color
Color.rgb(0, 100, 0), // point color
null); // fill color (none)
// add a new series' to the xyplot:
**mySimpleXYPlot.addSeries(series1, series1Format);**
// same as above:
//mySimpleXYPlot.addSeries(series2,
// new LineAndPointFormatter(Color.rgb(0, 0, 200), Color.rgb(0, 0, 100), null));
// reduce the number of range labels
**mySimpleXYPlot.setTicksPerRangeLabel(3);**
// by default, AndroidPlot displays developer guides to aid in laying out your plot.
// To get rid of them call disableAllMarkup():
**mySimpleXYPlot.disableAllMarkup();**
}
}
*plot_xml.xml :*
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#+dimen/activity_vertical_margin"
android:paddingLeft="#+dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".XYPlot" >
<com.arise.plotme.XYPlot
android:id="#+id/mySimpleXYPlot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10px"
android:layout_marginLeft="10px"
android:layout_marginRight="10px"
title="XY Plot me"/>
</RelativeLayout>
*Plot_Me MAnifest :*
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.arise.plotme"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.arise.plotme.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.arise.plotme.XYPlot"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
Actually I have two layout of xml because I have two activity.
This is my second activity, my first activity contain no error.
Any helps are much appreciated.

Answer 1

Please replace your manifest file to this.
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.arise.plotme.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.arise.plotme.XYPlot"
android:label="#string/app_name" >
</activity>
</application>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />