代码运行不了,该怎么处理

package com.example.listview;
import static java.lang.System.out;
import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.graphics.Color;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.PhoneLookup;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.Display;
import android.view.View;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class Activity01 extends Activity {
	LinearLayout m_LinearLayout;
	ListView m_ListView;

	public void onCreate(Bundle savedInstanceState) {
		String number = "";
		String contact="";
		super.onCreate(savedInstanceState);
		
		String string = "";
		/* 创建LinearLayout布局对象 */
		m_LinearLayout = new LinearLayout(this);
		m_LinearLayout.setOrientation(LinearLayout.VERTICAL);
		m_LinearLayout.setBackgroundColor(android.graphics.Color.BLACK);
		/* 创建ListView对象 */
		m_ListView = new ListView(this);
		LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
				LinearLayout.LayoutParams.FILL_PARENT,
				LinearLayout.LayoutParams.WRAP_CONTENT);
		m_ListView.setBackgroundColor(Color.BLACK);
		/* 添加m_ListView到m_LinearLayout布局 */
		m_LinearLayout.addView(m_ListView, param);
		/* 设置显示m_LinearLayout布局 */
		setContentView(m_LinearLayout);
		/* 获取数据库phone的cursor */
		
		ContentResolver cur = getContentResolver();
		Cursor cursor = cur.query(ContactsContract.Contacts.CONTENT_URI, null,
				null, null, null);
		startManagingCursor(cursor);
		while (cursor.moveToNext()) {

			//logCursor(cursor);

			int i = 0;

			i = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);

			 contact = cursor.getString(i);

			String contactId = cursor.getString(cursor
					.getColumnIndex(ContactsContract.Contacts._ID)); // 获取联系人的ID号，在SQLite中的数据库ID
			
			Cursor phone = cur.query(
					ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
					ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = "
							+ contactId, null, null);

			

			while (phone.moveToNext()) {
				
				String strPhoneNumber = phone
						.getString(phone
								.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); // 手机号码字段联系人可能不止一个
				number += strPhoneNumber;
				
			}
			

			string += (contact + ":" + number + "\n");

		
			
		}
ListAdapter adapter=new SimpleCursorAdapter(this,android.R.layout.simple_list_item_2,(Cursor) cur,new String[]{contact,number},new int[]{android.R.id.text1,android.R.id.text2});
m_ListView.setAdapter(adapter);
m_ListView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
	@Override
	public void onItemSelected(AdapterView<?> arg0,View arg1,int arg2,long arg3)
	{
		DisplayerToast("滚动到第"+Long.toString(arg0.getSelectedItemId())+"项");
	}
	public void onNothingSelected(AdapterView<?> arg0)
	{
		//没有选中
	}
});
m_ListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
	

	public void onItemClick(AdapterView<?> arg0,View arg1,int arg2,Long arg3)
	{
		DisplayerToast("选中了第"+Integer.toString(arg2+1)+"项");
	}


});
	}
	public void DisplayerToast(String str)
	{
		Toast.makeText(this, str,Toast.LENGTH_SHORT).show();
	}
}