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 | 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。