Android 通過 intent傳值獲得null

我在通過intent 獲得傳遞兌現過的時候報錯，空指針,我是getMap方法進行傳值，代碼如下

public void getMap(View view){
 
        Intent i = new Intent(this, BreweryYourTopBeers.class);
        Log.d(map , e.beerBreweryId);
        i.putExtra(breweryID,  e.beerBreweryId);
        i.setClass(this, BreweryMap.class);
 
        startActivity(i);
    }

從我的日志中能夠看到 在傳值之前e.beerBreweryId 確實有值，我在下面的代碼中獲取改值

public class BreweryMap extends ActionbarMenu {
    BeerData e;
     String beerID;
     GoogleMap map;
    //從bundle  中獲得beer  詳細信息
     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_brewerymap);
        //get brewery data
        //get beer data
         Intent intent = getIntent();
         Bundle extras = intent.getExtras();
  
        String breweryID = extras.getString(brewreyID);
        map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
         String url = http://api.brewerydb.com/v2/brewery/+ breweryID +?key=myKey&format=json&withLocations=y;
        Log.d(map, url);
         new myAsyncTask(this,map).execute(url);
}
}

處理方法

有一行寫錯誤了.
把
String breweryID = extras.getString(brewreyID);
換成
String breweryID = extras.getString(breweryID);