Android 通过 intent传值获得null_移动开发_编程开发_程序员俱乐部

我在通过intent 获得传递兑现过的时候报错，空指针,我是getMap方法进行传值，代码如下

1 2 3 4 5 6 7 8 9 class="java keyword" style="margin: 0px !important; padding: 0px !important; outline: 0px !important; border-radius: 0px !important; border: 0px currentColor !important; left: auto !important; top: auto !important; width: auto !important; height: auto !important; text-align: left !important; right: auto !important; bottom: auto !important; color: #006699 !important; line-height: 1.1em !important; overflow: visible !important; font-family: Consolas, 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important; font-size: 1em !important; font-style: normal !important; font-weight: bold !important; vertical-align: baseline !important; float: none !important; position: static !important; min-height: inherit !important; box-sizing: content-box !important;">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);     }

从我的日志中能够看到  在传值之前e.beerBreweryId  确实有值，我在下面的代码中获取改值

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 public class BreweryMap extends ActionbarMenu {     BeerData e;      String beerID;      GoogleMap map;     //从bundle  中获得beer  详细信息      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); } }

我每次获得值都是NULL ，不知道是什么原因.

处理方法

 

有一行写错误了. 把 String breweryID = extras.getString("brewreyID"); 换成 String breweryID = extras.getString("breweryID");

 

原文地址：http://www.itmmd.com/201411/134.html  该文章由 萌萌的IT人 整理发布,转载须标明出处。