IntentService运行时异常
问题:启动 IntentService
生成 RuntimeException
。
我一无所知。如果您需要更多信息,请询问。日志:
D/dalvikvm( 6839): newInstance failed: no <init>()
D/AndroidRuntime( 6839): Shutting down VM
W/dalvikvm( 6839): threadid=1: thread exiting with uncaught exception (group=0x40015560)
E/AndroidRuntime( 6839): FATAL EXCEPTION: main
E/AndroidRuntime( 6839): java.lang.RuntimeException: Unable to instantiate service org.xyz.android.service.MyService: java.lang.InstantiationException: org.xyz.android.service.MyService
E/AndroidRuntime( 6839): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1929)
E/AndroidRuntime( 6839): at android.app.ActivityThread.access$2500(ActivityThread.java:117)
E/AndroidRuntime( 6839): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:985)
E/AndroidRuntime( 6839): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 6839): at android.os.Looper.loop(Looper.java:130)
E/AndroidRuntime( 6839): at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime( 6839): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 6839): at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime( 6839): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
E/AndroidRuntime( 6839): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
E/AndroidRuntime( 6839): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 6839): Caused by: java.lang.InstantiationException: org.xyz.android.service.MyService
E/AndroidRuntime( 6839): at java.lang.Class.newInstanceImpl(Native Method)
E/AndroidRuntime( 6839): at java.lang.Class.newInstance(Class.java:1409)
E/AndroidRuntime( 6839): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1926)
E/AndroidRuntime( 6839): ... 10 more
此代码调用服务(它是从 ContentProvider
调用的):
Intent i = new Intent(
getContext(),
MyService.class);
i.putStringArrayListExtra(EXTRA_MISSING, missingMonths);
i.putExtra(EXTRA_URI, uri);
i.putExtra(EXTRA_START, startTime);
i.putExtra(EXTRA_END, endTime);
getContext().startService(i);
这是与 IntentService
相关的代码块(只有两个方法。除了 asynctask 本身之外,当然):
public MyService(String name) {
super("MyService");
}
@Override
protected void onHandleIntent(Intent intent) {
// ... do stuff
new DownloaderTask().execute(missingMonths);
}
Possible Duplicate:
Android RuntimeException: Unable to instantiate the service
Problem: starting an IntentService
generates a RuntimeException
.
I'm clueless. If you need more info, just ask. Log:
D/dalvikvm( 6839): newInstance failed: no <init>()
D/AndroidRuntime( 6839): Shutting down VM
W/dalvikvm( 6839): threadid=1: thread exiting with uncaught exception (group=0x40015560)
E/AndroidRuntime( 6839): FATAL EXCEPTION: main
E/AndroidRuntime( 6839): java.lang.RuntimeException: Unable to instantiate service org.xyz.android.service.MyService: java.lang.InstantiationException: org.xyz.android.service.MyService
E/AndroidRuntime( 6839): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1929)
E/AndroidRuntime( 6839): at android.app.ActivityThread.access$2500(ActivityThread.java:117)
E/AndroidRuntime( 6839): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:985)
E/AndroidRuntime( 6839): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 6839): at android.os.Looper.loop(Looper.java:130)
E/AndroidRuntime( 6839): at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime( 6839): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 6839): at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime( 6839): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
E/AndroidRuntime( 6839): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
E/AndroidRuntime( 6839): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 6839): Caused by: java.lang.InstantiationException: org.xyz.android.service.MyService
E/AndroidRuntime( 6839): at java.lang.Class.newInstanceImpl(Native Method)
E/AndroidRuntime( 6839): at java.lang.Class.newInstance(Class.java:1409)
E/AndroidRuntime( 6839): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1926)
E/AndroidRuntime( 6839): ... 10 more
This code calls the service (it's being called from a ContentProvider
):
Intent i = new Intent(
getContext(),
MyService.class);
i.putStringArrayListExtra(EXTRA_MISSING, missingMonths);
i.putExtra(EXTRA_URI, uri);
i.putExtra(EXTRA_START, startTime);
i.putExtra(EXTRA_END, endTime);
getContext().startService(i);
And this is the IntentService
relevant code blocks (there are only two methods. Besides the asynctask itself, of course):
public MyService(String name) {
super("MyService");
}
@Override
protected void onHandleIntent(Intent intent) {
// ... do stuff
new DownloaderTask().execute(missingMonths);
}
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您似乎缺少零参数公共构造函数。从当前构造函数中删除
String name
(因为您无论如何都没有使用它),然后就可以开始了。You appear to be missing the zero-argument public constructor. Delete the
String name
from your current constructor (since you're not using it anyway), and you should be good to go.