android - Android-如何从restartPackage()保存服务？

Question

我制作了一个应用程序，该应用程序应在我的应用程序启动后立即启动。

但是问题是无论何时我尝试使用那里的任何Task Killer杀死我的应用程序，然后我的服务就会崩溃并显示NullPointerException。据我所知，这些任务杀手使用软件包名称调用restartPackage()。

这就是我开始服务的方式:-

Intent intent = new Intent(myContext, BackService.class);
intent.putExtra("input", duration);
startService(intent);

在这里，我在杀死我的应用程序后得到了NullPointerException:

Long duration = intent.getLongExtra("input", 199999999);

任何想法如何解决这个问题？

堆栈跟踪 :-

java.lang.RuntimeException: Unable to start service com.varundroid.util.manager.BackService@47b8ee08 with null: java.lang.NullPointerException
    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3063)
    at android.app.ActivityThread.access$3600(ActivityThread.java:125)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2096)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:4627)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
    at com.varundroid.util.manager.BackService.onStart(BackService.java:77)
    at android.app.Service.onStartCommand(Service.java:420)
    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3053)
    ... 10 more
java.lang.NullPointerException
    at com.varundroid.util.manager.BackService.onStart(BackService.java:77)
    at android.app.Service.onStartCommand(Service.java:420)
    at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3053)
    at android.app.ActivityThread.access$3600(ActivityThread.java:125)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2096)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:4627)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)
    at dalvik.system.NativeStart.main(Native Method)

Answer 1

当应用程序被杀死时，传递给Intent的Context似乎无效。简单的解决方法是:

Long duration = 199999999;
if(intent!=null){
    duration = intent.getLongExtra("input", 199999999);
}