LocationServices运行时错误

Question

我一直收到运行时异常（见下文） 我真的不能完全解决这个问题。

这是堆栈跟踪：

NullPointerException

这个

java.lang.IllegalAccessError: Illegal class access: 'com.google.android.gms.location.FusedLocationProviderClient' attempting to access 'com.google.android.gms.internal.zzbce' (declaration of 'com.google.android.gms.location.FusedLocationProviderClient' appears in /data/app/app.puresecure-1/base.apk)
    at com.google.android.gms.location.FusedLocationProviderClient.<init>(Unknown Source)
    at com.google.android.gms.location.LocationServices.getFusedLocationProviderClient(Unknown Source)
    at app.puresecure.LocationActivity.onCreate(LocationActivity.java:20)
    at android.app.Activity.performCreate(Activity.java:6956)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2927)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
    at android.app.ActivityThread.-wrap14(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6776)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1518)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1408)

参考：

at app.puresecure.LocationActivity.onCreate(LocationActivity.java:20)