尝试在空对象引用上调用虚拟方法“java.lang.String[] android.os.Bundle.getStringArray(java.lang.String)”
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Attempt to invoke virtual method 'java.lang.String[] android.os.Bundle.getStringArray(java.lang.String)' on a null object reference
提问by robWDC
I need to pass a long[] from an Activity to an IntentService. Created a Bundle, stored the array in the Bundle and then added the Bundle to the Intent. In the IntentService, when i try to extract the Bundle, i get:
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] android.os.Bundle.getStringArray(java.lang.String)' on a null object reference.As you can see, i've tried this with both a long[] and String[] and both fault in the same way.
我需要将 long[] 从 Activity 传递到 IntentService。创建了一个 Bundle，将数组存储在 Bundle 中，然后将 Bundle 添加到 Intent。在 IntentService 中，当我尝试提取 Bundle 时，我得到：
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String[] android.os.Bundle.getStringArray(java.lang.String)' on a null object reference.如您所见，我已尝试使用 long[] 和 String[] 进行此操作，并且两者都以相同的方式出错。
In the Activity
在活动中
String[] sAr = {"some", "times"};
// launch simulator threads using test parameters
Intent inStartSim = new Intent(this, SimService.class);
//inStartSim.setAction("TrigParm");
inStartSim.setAction("genData");
Bundle simBundle = new Bundle();
//simBundle.putByteArray(arSimConfig);
//simBundle.putLongArray("simConfigAr",arSim1Config);
simBundle.putStringArray("simConfigAr",sAr);
inStartSim.putExtras(simBundle);
startService(inStartSim);
In the IntentService
在 IntentService
Bundle simBundle = intent.getBundleExtra("simBundle");
long[] simConfigParm;
String[] sAr;
//simConfigParm = simBundle.getLongArray("simConfigAr");
sAr = simBundle.getStringArray("simConfigAr");
When drilling into the Bundle object after the exception, i did notice that the identifiers are different:
在异常之后钻入 Bundle 对象时，我确实注意到标识符不同：
Bundle[{simConfigAr=[J@5668b8a}] – in Simulator
Bundle[{simConfigAr=[J@f0d80de}] – in SimService
I know that there are many other ways to move data between Activities and Services, but this seemed to be the easiest. http://developer.android.com/guide/faq/framework.html#3- a good starting point for other techniques.
我知道还有许多其他方法可以在活动和服务之间移动数据，但这似乎是最简单的。 http://developer.android.com/guide/faq/framework.html#3- 其他技术的良好起点。
回答by Rohit5k2
You need to get the value from the bundle you are putting into
您需要从要放入的捆绑包中获取价值
Solution 1
方案一
Change this in you intent service
在你的意图服务中改变这一点
Bundle simBundle = intent.getBundleExtra("simBundle");
to
到
Bundle simBundle = intent.getExtras();
Solution 2This is preferred if you will send extra values from other activity too to the same service
解决方案 2如果您也将来自其他活动的额外值发送到同一服务，则这是首选
Change this in your Activity
在您的活动中更改此设置
inStartSim.putExtras(simBundle);
to
到
inStartSim.putExtra("simBundle", simBundle)
