启动 IntentService时错误
启动 IntentService时异常
今天写一个service继承自 IntentService,但是在启动的时候报错,报错内容:
今天写一个service继承自 IntentService,但是在启动的时候报错,报错内容: 04-27 16:45:40.289: W/dalvikvm(8792): threadid=1: thread exiting with uncaught exception (group=0x40015578) 04-27 16:45:40.390: E/AndroidRuntime(8792): FATAL EXCEPTION: main 04-27 16:45:40.390: E/AndroidRuntime(8792): java.lang.RuntimeException: Unable to instantiate service com.example.UpdateService1: java.lang.InstantiationException: com.example.UpdateService1 04-27 16:45:40.390: E/AndroidRuntime(8792): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1933) 04-27 16:45:40.390: E/AndroidRuntime(8792): at android.app.ActivityThread.access$2500(ActivityThread.java:117) 04-27 16:45:40.390: E/AndroidRuntime(8792): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:989) 04-27 16:45:40.390: E/AndroidRuntime(8792): at android.os.Handler.dispatchMessage(Handler.java:99) 04-27 16:45:40.390: E/AndroidRuntime(8792): at android.os.Looper.loop(Looper.java:123) 04-27 16:45:40.390: E/AndroidRuntime(8792): at android.app.ActivityThread.main(ActivityThread.java:3687) 04-27 16:45:40.390: E/AndroidRuntime(8792): at java.lang.reflect.Method.invokeNative(Native Method) 04-27 16:45:40.390: E/AndroidRuntime(8792): at java.lang.reflect.Method.invoke(Method.java:507) 04-27 16:45:40.390: E/AndroidRuntime(8792): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) 04-27 16:45:40.390: E/AndroidRuntime(8792): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 04-27 16:45:40.390: E/AndroidRuntime(8792): at dalvik.system.NativeStart.main(Native Method) 04-27 16:45:40.390: E/AndroidRuntime(8792): Caused by: java.lang.InstantiationException: com.example.UpdateService1 04-27 16:45:40.390: E/AndroidRuntime(8792): at java.lang.Class.newInstanceImpl(Native Method) 04-27 16:45:40.390: E/AndroidRuntime(8792): at java.lang.Class.newInstance(Class.java:1409) 04-27 16:45:40.390: E/AndroidRuntime(8792): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1930) 04-27 16:45:40.390: E/AndroidRuntime(8792): ... 10 more 04-27 16:46:07.199: I/Process(8792): Sending signal. PID: 8792 SIG: 9
最后发现错误是在 构造函数方面
启动服务代码:
写道
startService(new Intent(this,UpdateService1.class));
UpdateService1.class 继承 IntentService ,构造函数应该不带参数,结果带了参数,改成
public UpdateService1() { super("SOME NAME"); }