我在学习调用高德地图API时遇到了这个错误，该注册的应该都在manifest中注册了，提供帮助的话感激不尽！
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dkx.gaode/com.dkx.gaode.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.amap.api.location.AMapLocationClient.setLocationListener(com.amap.api.location.AMapLocationListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.amap.api.location.AMapLocationClient.setLocationListener(com.amap.api.location.AMapLocationListener)' on a null object reference
MainActivity这里 设置 地图监听 setLocationListener，这时候的地图监听是不是还没初始化导致引用空？