如何设置唯一ID或推送：
08-21 15:25:39.823 18627-18627/com.example.android.mbm I/HwSecImmHelper: mSecurityInputMethodService is null
08-21 15:25:42.613 18627-18627/com.example.android.mbm E/InputEventReceiver: Exception dispatching input event.
08-21 15:25:42.613 18627-18627/com.example.android.mbm E/MessageQueue-JNI: Exception in MessageQueue callback: handleReceiveCallback08-21 15:25:42.616 18627-18627/com.example.android.mbm E/MessageQueue-JNI: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.res.Resources.getString(int)' on a null object reference
at com.example.android.mbm.model.Movie.getInfo(Movie.java:103)
at com.example.android.mbm.fragments.MovieFragment$1.onItemClick(MovieFragment.java:44)
at com.example.android.mbm.fragments.MovieFragment$RecyclerItemClickListener.onInterceptTouchEvent(MovieFragment.java:117)
at android.support.v7.widget.RecyclerView.dispatchOnItemTouch(RecyclerView.java:2261)
at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:2389)
at android.view.View.dispatchTouchEvent(View.java:9390)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2549)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2240)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2555)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2254)
at com.android.internal.policy.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2461)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1777)
at android.app.Activity.dispatchTouchEvent(Activity.java:2865)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:60)
at com.android.internal.policy.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2422)
at android.view.View.dispatchPointerEvent(View.java:9610)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4436)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4302)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3836)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3889)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3855)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3981)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3863)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4038)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3836)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3889)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3855)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3863)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3836)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6135)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6109)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6070)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6251)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:192)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:330)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5546)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller
08-21 15:25:42.649 18627-18627/com.example.android.mbm I/Process: Sending signal. PID: 18627 SIG: 9
现在，如果我将位置设置为用户A，然后将位置设置为用户B，则设置位置将被用户B替换。