Android studio 使用startService報錯：IllegalStateException

Android 8.0啓動service報錯：java.lang.RuntimeException和java.lang.IllegalStateException

錯誤信息：

java.lang.RuntimeException: Unable to start receiver cn.edu.zut.broadservice.MyReceiver: java.lang.IllegalStateException: Not allowed to start service Intent { cmp=cn.edu.zut.broadservice/.MyService }: app is in background uid UidRecord{b67c471 u0a86 RCVR idle change:uncached procs:1 seq(0,0,0)}
        at android.app.ActivityThread.handleReceiver(ActivityThread.java:3388)
        at android.app.ActivityThread.access$1200(ActivityThread.java:199)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1661)
        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(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.IllegalStateException: Not allowed to start service Intent { cmp=cn.edu.zut.broadservice/.MyService }: app is in background uid UidRecord{b67c471 u0a86 RCVR idle change:uncached 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 android.content.ContextWrapper.startService(ContextWrapper.java:664)
        at cn.edu.zut.broadservice.MyReceiver.onReceive(MyReceiver.java:24)
        at android.app.ActivityThread.handleReceiver(ActivityThread.java:3379)
        at android.app.ActivityThread.access$1200(ActivityThread.java:199) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1661) 
        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(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 

錯誤緣由：

• 若是針對 Android 8.0 的應用嘗試在不容許其建立後臺服務的狀況下使用 startService() 函數，則該函數將引起一個 IllegalStateException。
• 新的 Context.startForegroundService() 函數將啓動一個前臺服務。如今，即便應用在後臺運行，系統也容許其調用 Context.startForegroundService()。不過，應用必須在建立服務後的五秒內調用該服務的 startForeground() 函數。
• 如需瞭解詳細信息，請參閱後臺執行限制。

解決方案：

在 原來啓動service的地方，把startService()；替換爲下面的代碼。

Intent intent = new Intent(context, MyService.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    context.startForegroundService(intent);
} else {
   context.startService(intent);
}

而且在service的類裏面加入（若加入上面代碼後正常運行可忽略此內容）

@Override
public void onCreate() {
    super.onCreate();
   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
       startForeground(1,new Notification()); 
}

參考 ：參考地址