Android :: Getting Run Time Error

i am getting error that the app has stopped unexpectedly as soon as i lauch the following programme on the emulator:package com.example.TextSpeaker2;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.widget.Button;
import android.widget.Toast;
public class TextSpeaker2 extends Activity implements OnInitListener{
public static final Uri SMS_CONTENT_URI = Uri.parse("content://sms");
public static final Uri SMS_INBOX_CONTENT_URI = Uri.withAppendedPath(SMS_CONTENT_URI, "inbox");
int MY_DATA_CHECK_CODE = 0;
public static TextToSpeech mtts;
public static String body="";
Button speak;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent myintent = new Intent();
myintent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(myintent, MY_DATA_CHECK_CODE);
getSmsDetails(this, 0, false);
}Public static void getSmsDetails(Context context, long ignoreThreadId, boolean unreadOnly) {
String SMS_READ_COLUMN = "read";
String WHERE_CONDITION = unreadOnly ? SMS_READ_COLUMN + " = 0" : null;
String SORT_ORDER = "date DESC";
int count = 0;
if (ignoreThreadId > 0) {
WHERE_CONDITION += " AND thread_id != " + ignoreThreadId;
}Cursor cursor = context.getContentResolver().query(SMS_INBOX_CONTENT_URI,
new String[] { "_id", "thread_id", "address", "person", "date", "body" }, WHERE_CONDITION, null, SORT_ORDER);
if (cursor != null) {
count = cursor.getCount();
cursor.moveToFirst();
} else {
return;
} long messageId = cursor.getLong(0);
long threadId = cursor.getLong(1);
String address = cursor.getString(2);
long contactId = cursor.getLong(3);
String contactId_string = String.valueOf(contactId);
long timestamp = cursor.getLong(4);
body = cursor.getString(5);
StringBuffer smsMessage = new StringBuffer();
smsMessage.append("MessageID: " + messageId + "/" + count + "
"); smsMessage.append("ThreadID: " + threadId + "
"); smsMessage.append("address: " + address + "
"); smsMessage.append("contactID: " + contactId + "
"); smsMessage.append("contactID_string: " + contactId_string + "
"); smsMessage.append("timestamp: " + timestamp + "
"); smsMessage.append("body: " + body + "
"); Toast.makeText(context, smsMessage.toString(), Toast.LENGTH_LONG).show();