java.lang.NullPointerException:

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09-29 09:18:25.694 22415-22415/com.moreunion.zhenghao E/AndroidRuntime: FATAL EXCEPTION: main
                                                                        Process: com.moreunion.zhenghao, PID: 22415
                                                                        java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object java.util.List.get(int)' on a null object reference
                                                                            at com.example.yilibrary.utils.LocationService.getGeocoder(LocationService.java:92)
                                                                            at com.example.yilibrary.utils.LocationService.access$000(LocationService.java:27)
                                                                            at com.example.yilibrary.utils.LocationService$1.onLocationChanged(LocationService.java:56)
                                                                            at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:317)
                                                                            at android.location.LocationManager$ListenerTransport.-wrap0(LocationManager.java)
                                                                            at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:242)
                                                                            at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                            at android.os.Looper.loop(Looper.java:156)
                                                                            at android.app.ActivityThread.main(ActivityThread.java:6524)
                                                                            at java.lang.reflect.Method.invoke(Native Method)
                                                                            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
                                                                            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)