IllegalStateException：不允许启动服务意图（来自活动onCreate）

Question

java.lang.IllegalStateException: Not allowed to start service Intent { cmp=com.company.mobile/com.company.mobile.gcm.RegistrationIntentService }: app is in background uid UidRecord{c96fbae u0a184 TPSL idle procs:1 seq(0,0,0)}
    at android.app.ContextImpl.startServiceCommon()(ContextImpl.java:1577)
    at android.app.ContextImpl.startService()(ContextImpl.java:1532)
    at android.content.ContextWrapper.startService()(ContextWrapper.java:664)
    at cs.a()(FirebaseUtility.java:42)
    at com.company.mobile.MainActivity.onCreate()(MainActivity.java:81)
    at android.app.Activity.performCreate()(Activity.java:7136)
    at android.app.Activity.performCreate()(Activity.java:7127)
    at android.app.Instrumentation.callActivityOnCreate()(Instrumentation.java:1271)
    at android.app.ActivityThread.performLaunchActivity()(ActivityThread.java:2893)
    at android.app.ActivityThread.handleLaunchActivity()(ActivityThread.java:3048)
    at android.app.servertransaction.LaunchActivityItem.execute()(LaunchActivityItem.java:78)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks()(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute()(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage()(ActivityThread.java:1808)
    at android.os.Handler.dispatchMessage()(Handler.java:106)
    at android.os.Looper.loop()(Looper.java:193)
    at android.app.ActivityThread.main()(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke()(Method.java:-2)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run()(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main()(ZygoteInit.java:858)

Answer 1

只有在调用了onresume()之后，您的活动才被认为在前台。这就是为什么不允许从oncreate()启动intentservice

引用过程和应用程序生命周期

前台进程是用户当前正在做的事情所需要的进程。不同的应用程序组件可以使其包含的进程以不同的方式被视为前台。如果满足下列任一条件，则进程被视为处于前台：

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