error when saving a java file ( Some characters can not be mapped using Cp1252 character encoding)

Question

When I am tring to save a java file, an error occured and and I can not save the file.

Error is :

"Some characters can not be mapped using Cp1252 character encoding."

My Code is :

package org.anddev.android.HelloWorld;

import android.app.Activity;

import android.content.SharedPreferences;

import android.os.Bundle;

import android.text.Editable;

import android.text.TextWatcher;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.*;

public class LifeCycleDemo extends Activity {

LinearLayout myScreen;

TextView txtColorSelect;

int actMode = 0;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.lifecycledemo);

myScreen = (LinearLayout) findViewById(R.id.myScreen);

TextView txtToDo = (TextView) findViewById(R.id.txtToDo);

String msg =

"Instructions: \n" + "0. New instance (onCreate, onStart, onResume) \n" + "1. Back Arrow (onPause, onStop, onDestroy) \n" + "2. Finish (onPause, onStop, onDestroy) \n" + "3. Home (onPause, onStop) \n" + "4. After 3 > App Tab > re-execute current app \n" + " (onRestart, onStart, onResume) \n" + "5. Run DDMS > Receive a phone call or SMS \n" + " (onRestart, onStart, onResume) \n" + "6. Enter some data - repeat steps 1-5 \n";

　 　 　

txtToDo.setText(msg); @Override

protected void onPause() { super.onPause(); //saveDataFromCurrentState();

 Toast.makeText(this, "onPause", 1).show(); 

}

@Override

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

Toast.makeText(

this, "onRestart", 1).show();

}

@Override

protected void onResume() {

super.onResume();

Toast.makeText(

this, "onResume", 1).show();

}

@Override

protected void onStart() {

// TODO Auto-generated method stub

super.onStart();

//updateFromSavedState(); Toast.makeText(this, "onStart", 1).show();

}

@Override

protected void onDestroy() {

// TODO Auto-generated method stub

super.onDestroy();

Toast.makeText(this, "onDestroy", 1).show();

}

@Override

protected void onStop() {

// TODO Auto-generated method stub super.onStop();

Toast.makeText(this, "onStop", 1).show();

}

Please help me,...